Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (80,546)	$ (34,959)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation	107,247	85,194
Amortization of intangible assets	41,944	25,589
Non-cash stock-based compensation expense	8,515	6,336
(Benefit from) provision for deferred income taxes	(30,863)	1,647
Equity in earnings of unconsolidated affiliates, net	(9,152)	(6,777)
Gains on sales of assets, net	(7,818)	(2,568)
Non-cash interest expense, net	1,367	854
Other non-cash items, net	1,585	(926)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	50,082	121,646
Contract assets	(22,011)	(104,490)
Inventories	(5,673)	(8,980)
Other assets, current and long-term portion	36,587	36,268
Accounts payable and accrued expenses	(212,714)	14,537
Contract liabilities	29,495	(13,802)
Other liabilities, current and long-term portion	5,584	11,949
Net cash (used in) provided by operating activities	(86,371)	131,518
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	(46,506)	(21,840)
Capital expenditures	(63,346)	(83,191)
Proceeds from sales of property and equipment	19,946	4,630
Payments for other investments	(205)	(960)
Proceeds from other investments	425	0
Other investing activities, net	200	0
Net cash used in investing activities	(89,486)	(101,361)
Cash flows from financing activities:
Proceeds from credit facilities	918,000	773,500
Repayments of credit facilities	(911,188)	(855,083)
Payments of finance lease obligations	(37,047)	(41,600)
Repurchases of common stock	0	(13,791)
Payments to non-controlling interests, including acquisition of interests and distributions	(11,660)	0
Payments for stock-based awards	(13,107)	(3,996)
Other financing activities, net	1,560	(17,046)
Net cash used in financing activities	(53,442)	(158,016)
Effect of currency translation on cash	267	256
Net decrease in cash and cash equivalents	(229,032)	(127,603)
Cash and cash equivalents - beginning of period	370,592	360,736
Cash and cash equivalents - end of period	141,560	233,133
Supplemental cash flow information:
Interest paid	59,444	23,178
Income tax payments, net	(939)	(740)
Supplemental disclosure of non-cash information:
Additions to property and equipment from finance leases	$ 22,633	$ 48,604