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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Cash flows from operating activities:    
Net income (loss) $ (63,792) $ (18,704)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation 210,285 172,195
Amortization of intangible assets 83,987 53,263
Non-cash stock-based compensation expense 17,090 13,172
(Benefit from) provision for deferred income taxes (42,548) 6,190
Equity in earnings of unconsolidated affiliates, net (16,648) (13,364)
Gains on sales of assets, net (13,598) (8,662)
Non-cash interest expense, net 2,864 1,709
Other non-cash items, net 389 301
Changes in assets and liabilities, net of acquisitions:    
Accounts receivable (61,606) 18,575
Contract assets (97,689) (289,018)
Inventories 3,693 (19,844)
Other assets, current and long-term portion 38,324 521
Accounts payable and accrued expenses (204,453) 99,796
Contract liabilities 65,404 (11,915)
Other liabilities, current and long-term portion (19,612) (2,674)
Net cash (used in) provided by operating activities (97,910) 1,541 Close
Cash flows from investing activities:    
Cash paid for acquisitions, net of cash acquired (63,880) (44,908)
Capital expenditures (119,067) (189,870)
Proceeds from sales of property and equipment 42,570 17,722
Payments for other investments (1,627) (2,965)
Proceeds from other investments 425 0
Other investing activities, net 119 0
Net cash used in investing activities (141,460) (220,021) Close
Cash flows from financing activities:    
Proceeds from credit facilities 1,687,400 1,954,650
Repayments of credit facilities (1,580,775) (1,741,083)
Payments of finance lease obligations (85,223) (83,375)
Repurchases of common stock 0 (81,291)
Payments of acquisition-related contingent consideration (8,955) (26,779)
Payments for acquisition-related contingent assets 0 (17,636)
Payments to non-controlling interests, including acquisition of interests and distributions (11,660) 0
Payments for stock-based awards (10,256) (4,024)
Other financing activities, net (2,686) (3,446)
Net cash used in financing activities (12,155) (2,984) Close
Effect of currency translation on cash 838 (343)
Net decrease in cash and cash equivalents (250,687) (221,807) Close
Cash and cash equivalents - beginning of period 370,592 360,736
Cash and cash equivalents - end of period 119,905 138,929
Supplemental cash flow information:    
Interest paid 111,969 34,507
Income taxes paid, net of refunds 13,947 1,304
Supplemental disclosure of non-cash information:    
Additions to property and equipment from finance leases $ 70,464 $ 126,669