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Disclosure - Contract Assets and Liabilities - Contracts in process (Details) link:presentationLink link:calculationLink link:definitionLink 40306 - Disclosure - Contract Assets and Liabilities - Summary of net asset position for contracts in process (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Lease Obligations - Summary of lease-related assets and liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - Lease Obligations - Summary of lease related costs (Details) link:presentationLink link:calculationLink link:definitionLink 40406 - Disclosure - Lease Obligations - Schedule of future minimum lease payments (Details) link:presentationLink link:calculationLink link:definitionLink 40407 - Disclosure - Lease Obligations - Schedule of future minimum lease payments under ASC 840 (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Accounts Receivable - Schedule of accounts receivable (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Property and Equipment - Summary of property and equipment (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Goodwill and Intangible Assets - Summary of goodwill and intangible assets (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - Goodwill and Intangible Assets -Schedule of estimated future intangible asset amortization expense (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Accrued Liabilities - Schedule of other current liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Debt - Summary of total debt (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - Debt - Schedule of remaining principal payments for long term obligations (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Income Taxes - Summary of income before income taxes by geographical area (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - Income Taxes - Summary of income tax provision (Details) link:presentationLink link:calculationLink link:definitionLink 41203 - Disclosure - Income Taxes - Schedule of effective tax rate reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 41204 - Disclosure - Income Taxes - Summary of net deferred tax assets and (liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 41801 - 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:calculationLink link:definitionLink 00300 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Organization, Business and Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Acquisitions - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - Acquisitions - Summary of supplemental pro forma financial information (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Lease Obligations - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Goodwill and Intangible Assets - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Debt - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Revenue Recognition - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - Revenue Recognition - Schedule of revenue by contract type (Details) link:presentationLink link:calculationLink link:definitionLink 41103 - Disclosure - Revenue Recognition - Schedule of revenue by market type (Details) link:presentationLink link:calculationLink link:definitionLink 41104 - Disclosure - Revenue Recognition - Summary of remaining performance obligations (Details) link:presentationLink link:calculationLink link:definitionLink 41104 - Disclosure - Revenue Recognition - Summary of remaining performance obligations Default (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Commitments and Contingencies - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - Commitments and Contingencies - Summary of accrued short- and long-term insurance liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Stock-Based Compensation - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41402 - Disclosure - Stock-Based Compensation - Summary of stock option activity (Details) link:presentationLink link:calculationLink link:definitionLink 41404 - Disclosure - Stock-Based Compensation - Summary of stock options outstanding and exercisable (Details) link:presentationLink link:calculationLink link:definitionLink 41405 - Disclosure - Stock-Based Compensation - Summary of time-vested stock awards activity (Details) link:presentationLink link:calculationLink link:definitionLink 41406 - Disclosure - Stock-Based Compensation - Summary of performance share award activity (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Employee Benefit Plans - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - Employee Benefit Plans - Summary of multi-employer benefit plans (Details) link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - Segment Information - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - Segment Information - Summary of segment's internal financial reports (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - Segment Information - Summary of assets allocation by segment (Details) link:presentationLink link:calculationLink link:definitionLink 41604 - Disclosure - Segment Information - Summary of depreciation and amortization by segment (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Disclosure - Noncontrolling Interests - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41802 - Disclosure - Earnings Per Share - Summary of shares excluded from calculation of dilute securities (Details) link:presentationLink link:calculationLink link:definitionLink 41803 - Disclosure - Earnings Per Share - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - 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Disclosure - Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Revenue Recognition link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - Employee Benefit Plans link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 11701 - Disclosure - Noncontrolling Interests link:presentationLink link:calculationLink link:definitionLink 11801 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 11901 - Disclosure - Quarterly Financial Data (Unaudited) link:presentationLink link:calculationLink link:definitionLink 20102 - Disclosure - Organization, Business and Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Contract Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Lease Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Accounts Receivable (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - 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Disclosure - Contract Assets and Liabilities - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Lease Obligations - Summary of the lease terms and discount rates (Details) link:presentationLink link:calculationLink link:definitionLink 40405 - Disclosure - Lease Obligations - Summary of other and supplemental cash flow information related to leases (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Accounts Receivable - Summary of allowance for doubtful accounts activity (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Property and Equipment - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41205 - Disclosure - Income Taxes - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41206 - Disclosure - Income Taxes - Summary of liability for unrecognized tax benefits reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 41901 - Disclosure - Quarterly Financial Data (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink