Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net income including noncontrolling interests	$ 290,665	$ 207,915	$ 126,565
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	99,251	119,973	120,501
Amortization of debt issue costs	7,799	2,842	3,029
Loss (gain) on disposal of property and equipment	948	206	(164)
Convertible debt repurchase loss	18,355	0	0
Provision for doubtful accounts	0	32	57
Deferred taxes	6,101	(8,914)	(844)
Foreign currency transaction gains and losses	6,919	(330)	1,973
Equity in losses (earnings) of unconsolidated joint ventures	23,361	47,751	(16,347)
Return on investments in unconsolidated joint ventures	40,162	48,970	28,417
Stock-based compensation	56,082	34,365	23,008
Contributions of treasury stock	59,778	58,172	54,659
Changes in assets and liabilities, net of acquisitions and newly consolidated joint ventures
Accounts receivable	(163,139)	(176,181)	(117,318)
Contract assets	31,881	(119,898)	(32,032)
Prepaid expenses and other assets	35,830	(95,415)	(1,405)
Accounts payable	(42,686)	24,497	(717)
Accrued expenses and other current liabilities	79,984	163,440	3,879
Contract liabilities	(11,325)	84,439	41,306
Income taxes	(341)	2,886	(3,649)
Other long-term liabilities	(16,019)	12,949	6,608
Net cash provided by operating activities	523,606	407,699	237,526
Cash flows from investing activities
Capital expenditures	(49,213)	(40,396)	(30,593)
Proceeds from sale of property and equipment	179	546	771
Payments for acquisitions, net of cash acquired	(428,710)	(221,937)	(379,467)
Investments in unconsolidated joint ventures	(133,921)	(119,582)	(17,622)
Return of investments in unconsolidated joint ventures	54,950	5,018	9,443
Proceeds from sales of investments in unconsolidated joint ventures	0	381	0
Net cash used in investing activities	(556,715)	(375,970)	(417,468)
Cash flows from financing activities
Proceeds from borrowings under credit agreement	153,200	620,900	969,700
Proceeds from delayed draw term loan	0	0	350,000
Repayments of borrowings under credit agreement	(153,200)	(620,900)	(969,700)
Repayment of private placement debt	0	0	(200,000)
Payments for acquired warrants	0	0	(11,243)
Proceeds from issuance of convertible notes due 2029	800,000	0	0
Repurchases of convertible notes due 2025	(497,613)	0	0
Payments for debt costs and credit agreement	(19,185)	0	(862)
Contributions by noncontrolling interests	2,174	2,867	10,266
Distributions to noncontrolling interests	(29,199)	(12,496)	(24,128)
Repurchases of common stock	(25,000)	(11,000)	(22,000)
Taxes paid on vested stock	(22,560)	(7,301)	(7,042)
Capped call transactions	(88,400)	0	0
Bond hedge termination	195,549	0	0
Redemption of warrants	(104,952)	0	0
Proceeds from issuance of common stock	7,935	6,059	5,377
Net cash provided by (used in) financing activities	218,749	(21,871)	100,368
Effect of exchange rate changes	(5,035)	546	(1,770)
Net increase (decrease) in cash, cash equivalents and restricted cash	180,605	10,404	(81,344)
Cash, cash equivalents and restricted cash
Beginning of year	272,943	262,539	343,883
End of year	453,548	272,943	262,539
Cash paid during the year for
Interest	34,440	30,273	20,819
Income taxes (net of refunds)	$ 65,274	$ 74,133	$ 32,175