1001 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME link:presentationLink link:definitionLink link:calculationLink 1005 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:definitionLink link:calculationLink 1006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - Organization, Business and Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 1008 - Disclosure - Acquisitions link:presentationLink link:definitionLink link:calculationLink 1009 - Disclosure - Revenue Recognition link:presentationLink link:definitionLink link:calculationLink 1010 - Disclosure - Fair Value Measurements link:presentationLink link:definitionLink link:calculationLink 1011 - Disclosure - Accounts Receivable link:presentationLink link:definitionLink link:calculationLink 1012 - Disclosure - Property and Equipment link:presentationLink link:definitionLink link:calculationLink 1013 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:definitionLink link:calculationLink 1014 - Disclosure - Accrued Liabilities link:presentationLink link:definitionLink link:calculationLink 1015 - Disclosure - Debt link:presentationLink link:definitionLink link:calculationLink 1016 - Disclosure - Income Taxes link:presentationLink link:definitionLink link:calculationLink 1017 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 1018 - Disclosure - Lease Obligations link:presentationLink link:definitionLink link:calculationLink 1019 - Disclosure - Stock-Based Compensation link:presentationLink link:definitionLink link:calculationLink 1020 - Disclosure - Employee Benefit Plans link:presentationLink link:definitionLink link:calculationLink 1021 - Disclosure - Segment Information link:presentationLink link:definitionLink link:calculationLink 1022 - Disclosure - Noncontrolling Interests link:presentationLink link:definitionLink link:calculationLink 1023 - Disclosure - Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 1024 - Disclosure - Quarterly Financial Data (Unaudited) link:presentationLink link:definitionLink link:calculationLink 1025 - Disclosure - Organization, Business and Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 1026 - Disclosure - Acquisitions (Tables) link:presentationLink link:definitionLink link:calculationLink 1027 - Disclosure - Revenue Recognition (Tables) link:presentationLink link:definitionLink link:calculationLink 1028 - Disclosure - Accounts Receivable (Tables) link:presentationLink link:definitionLink link:calculationLink 1029 - Disclosure - Property and Equipment (Tables) link:presentationLink link:definitionLink link:calculationLink 1030 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:definitionLink link:calculationLink 1031 - Disclosure - Accrued Liabilities (Tables) link:presentationLink link:definitionLink link:calculationLink 1032 - Disclosure - Debt (Tables) link:presentationLink link:definitionLink link:calculationLink 1033 - Disclosure - Income Taxes (Tables) link:presentationLink link:definitionLink link:calculationLink 1034 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:definitionLink link:calculationLink 1035 - Disclosure - Lease Obligations (Tables) link:presentationLink link:definitionLink link:calculationLink 1036 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:definitionLink link:calculationLink 1037 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:definitionLink link:calculationLink 1038 - Disclosure - Segment Information (Tables) link:presentationLink link:definitionLink link:calculationLink 1039 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 1040 - Disclosure - Quarterly Financial Data (Unaudited) (Tables) link:presentationLink link:definitionLink link:calculationLink 1041 - Disclosure - Organization, Business and Significant Accounting Policies - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1042 - Disclosure - Acquisition - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1043 - Disclosure - Acquisitions - Summary of acquisition by acquisition (Details) link:presentationLink link:definitionLink link:calculationLink 1044 - Disclosure - Acquisitions - Summary of supplemental pro forma financial information (Details) link:presentationLink link:definitionLink link:calculationLink 1045 - Disclosure - Revenue Recognition - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1046 - Disclosure - Revenue Recognition - Schedule of revenue by contract type (Details) link:presentationLink link:definitionLink link:calculationLink 1047 - Disclosure - Revenue Recognition - Schedule of revenue by market type (Details) link:presentationLink link:definitionLink link:calculationLink 1048 - Disclosure - Revenue Recognition - Summary of contract assets (Details) link:presentationLink link:definitionLink link:calculationLink 1049 - Disclosure - Revenue Recognition - Summary of contract liabilities (Details) link:presentationLink link:definitionLink link:calculationLink 1050 - Disclosure - Revenue Recognition - Summary of assets and liabilities (Details) link:presentationLink link:definitionLink link:calculationLink 1051 - Disclosure - Revenue Recognition - Contracts in process (Details) link:presentationLink link:definitionLink link:calculationLink 1052 - Disclosure - Revenue Recognition - Summary of net asset position for contracts in process (Details) link:presentationLink link:definitionLink link:calculationLink 1053 - Disclosure - Revenue Recognition - Summary of remaining performance obligations (Details) link:presentationLink link:definitionLink link:calculationLink 1054 - Disclosure - Accounts Receivable - Schedule of accounts receivable (Details) link:presentationLink link:definitionLink link:calculationLink 1055 - Disclosure - Accounts Receivable - Summary of allowance for doubtful accounts activity (Details) link:presentationLink link:definitionLink link:calculationLink 1056 - Disclosure - Property and Equipment - Summary of property and equipment (Details) link:presentationLink link:definitionLink link:calculationLink 1057 - Disclosure - Property and Equipment - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1058 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1059 - Disclosure - Goodwill and Intangible Assets - Summary of goodwill and intangible assets (Details) link:presentationLink link:definitionLink link:calculationLink 1060 - Disclosure - Goodwill and Intangible Assets -Schedule of estimated future intangible asset amortization expense (Details) link:presentationLink link:definitionLink link:calculationLink 1061 - Disclosure - Accrued Liabilities - (Details) link:presentationLink link:definitionLink link:calculationLink 1062 - Disclosure - Debt - Summary of total debt - (Details) link:presentationLink link:definitionLink link:calculationLink 1063 - Disclosure - Debt - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1064 - Disclosure - Debt - Schedule of remaining principal payments for long term obligations (Details) link:presentationLink link:definitionLink link:calculationLink 1065 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1066 - Disclosure - Income Taxes - Summary of income before income taxes by geographical area (Details) link:presentationLink link:definitionLink link:calculationLink 1067 - Disclosure - Income Taxes - Summary of income tax provision (Details) link:presentationLink link:definitionLink link:calculationLink 1068 - Disclosure - Income Taxes - Schedule of effective tax rate reconciliation (Details) link:presentationLink link:definitionLink link:calculationLink 1069 - Disclosure - Income Taxes - Summary of net deferred tax assets and (liabilities) (Details) link:presentationLink link:definitionLink link:calculationLink 1070 - Disclosure - Income Taxes - Summary of liability for unrecognized tax benefits reconciliation (Details) link:presentationLink link:definitionLink link:calculationLink 1071 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1072 - Disclosure - Commitments and Contingencies - Summary of accrued short- and long-term insurance liabilities (Details) link:presentationLink link:definitionLink link:calculationLink 1073 - Disclosure - Lease Obligations - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1074 - Disclosure - Lease Obligations - Schedule of future minimum lease payments (Details) link:presentationLink link:definitionLink link:calculationLink 1075 - Disclosure - Stock-Based Compensation - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1076 - Disclosure - Stock-Based Compensation - Summary of stock option activity (Details) link:presentationLink link:definitionLink link:calculationLink 1077 - Disclosure - Stock-Based Compensation - Summary of other stock option related activity (Details) link:presentationLink link:definitionLink link:calculationLink 1078 - Disclosure - Stock-Based Compensation - Summary of stock options outstanding and exercisable (Details) link:presentationLink link:definitionLink link:calculationLink 1079 - Disclosure - Stock-Based Compensation - Summary of time-vested stock awards activity (Details) link:presentationLink link:definitionLink link:calculationLink 1080 - Disclosure - Stock-Based Compensation - Summary of performance share award activity (Details) link:presentationLink link:definitionLink link:calculationLink 1081 - Disclosure - Employee Benefit Plans - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1082 - Disclosure - Employee Benefit Plans - Summary of multi-employer benefit plans (Details) link:presentationLink link:definitionLink link:calculationLink 1083 - Disclosure - Segment Information - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1084 - Disclosure - Segment Information - Summary of segment's internal financial reports (Details) link:presentationLink link:definitionLink link:calculationLink 1085 - Disclosure - Segment Information - Summary of assets allocation by segment (Details) link:presentationLink link:definitionLink link:calculationLink 1086 - Disclosure - Segment Information - Summary of depreciation and amortization by segment (Details) link:presentationLink link:definitionLink link:calculationLink 1087 - Disclosure - Noncontrolling Interests - (Details) link:presentationLink link:definitionLink link:calculationLink 1088 - Disclosure - Earnings Per Share - Summary of weighted average number of common shares used to compute basic and dilute earnings per share (Details) link:presentationLink link:definitionLink link:calculationLink 1089 - Disclosure - Earnings Per Share - Summary of shared excluded from calculation of dilute securities (Details) link:presentationLink link:definitionLink link:calculationLink 1090 - Disclosure - Earnings Per Share - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink 1091 - Disclosure - Quarterly Financial Data (Unaudited) (Details) link:presentationLink link:definitionLink link:calculationLink 1092 - Disclosure - Quarterly Financial Data (Unaudited) - Narrative (Details) link:presentationLink link:definitionLink link:calculationLink