Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income (loss) including noncontrolling interests	$ (11,393)	$ 90,047
Adjustments to reconcile net (loss) income to net cash used in operating activities
Depreciation and amortization	48,971	57,048
Amortization of debt issue costs	5,326	1,414
Loss (gain) on disposal of property and equipment	408	43
Loss on extinguishment of debt	211,018	0
Provision for doubtful accounts	0	91
Deferred taxes	(222)	(5,220)
Foreign currency transaction gains and losses	2,039	230
Equity in losses of unconsolidated joint ventures	18,897	5,765
Return on investments in unconsolidated joint ventures	20,788	9,313
Stock-based compensation	20,675	15,978
Contributions of treasury stock	30,140	29,167
Changes in assets and liabilities, net of acquisitions and consolidated joint ventures:
Accounts receivable	(131,414)	(227,756)
Contract assets	(47,905)	(78,254)
Prepaid expenses and other assets	(9,396)	(40,899)
Accounts payable	10,585	35,043
Accrued expenses and other current liabilities	(10,533)	33,336
Contract liabilities	(1,360)	76,522
Income taxes	(52,509)	10,309
Other long-term liabilities	(6,308)	1,809
Net cash provided by operating activities	97,807	13,986
Cash flows from investing activities:
Capital expenditures	(18,698)	(17,956)
Proceeds from sale of property and equipment	53	65
Payments for acquisitions, net of cash acquired	(63)	(42,273)
Investments in unconsolidated joint ventures	(70,032)	(24,507)
Return of investments in unconsolidated joint ventures	25	72
Proceeds from sales of investments in unconsolidated joint ventures	0	381
Net cash used in investing activities	(88,715)	(84,218)
Cash flows from financing activities:
Proceeds from borrowings under credit agreement	153,200	187,400
Repayments of borrowings under credit agreement	(153,200)	(187,400)
Proceeds from issuance of convertible notes due 2029	800,000	0
Repurchases of convertible notes due 2025	(495,575)	0
Payments for debt issuance costs	(19,185)	0
Contributions by noncontrolling interests	77	200
Distributions to noncontrolling interests	(15,249)	(2,487)
Repurchases of common stock	(10,000)	(8,000)
Taxes paid on vested stock	(18,940)	(6,838)
Capped call transactions	(88,400)	0
Bond Hedge Termination	195,549	0
Redemption of warrants	(104,952)	0
Proceeds from issuance of common stock	3,740	2,940
Net cash (used in) provided by financing activities	247,065	(14,185)
Effect of exchange rate changes	(638)	467
Net increase (decrease) in cash, cash equivalents, and restricted cash	255,519	(83,950)
Cash, cash equivalents and restricted cash:
Beginning of year	272,943	262,539
End of period	$ 528,462	$ 178,589