Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income including noncontrolling interests	$ 14,371	$ 13,386
Adjustments to reconcile net income to net cash used in operating activities
Depreciation and amortization	32,409	30,591
Amortization of debt issue costs	173	244
Gain on disposal of property and equipment	(104)	(27)
Provision for doubtful accounts	0	(279)
Deferred taxes	5,514	1,486
Foreign currency transaction gains and losses	1,383	618
Equity in earnings of unconsolidated joint ventures	(6,114)	(10,397)
Return on investments in unconsolidated joint ventures	6,551	10,794
Stock-based compensation	2,252	0
Contributions of treasury stock	14,871	12,250
Changes in assets and liabilities, net of acquisitions and newly consolidated joint ventures:
Accounts receivable	(91,734)	(17,135)
Contract assets	(52,346)	(46,984)
Prepaid expenses and current assets	(3,766)	(1,424)
Accounts payable	19,788	(28,182)
Accrued expenses and other current liabilities	(24,336)	(24,023)
Contract liabilities	11,416	14,884
Income taxes	(6,212)	(3,645)
Other long-term liabilities	(43,099)	(12,265)
Net cash used in operating activities	(118,983)	(60,108)
Cash flows from investing activities:
Capital expenditures	(12,637)	(11,041)
Proceeds from sale of property and equipment	485	135
Payments for acquisitions, net of cash acquired	0	(287,482)
Investments in unconsolidated joint ventures	(50)	(4,905)
Return of investments in unconsolidated joint ventures	0	2,234
Net cash used in investing activities	(12,202)	(301,059)
Cash flows from financing activities:
Proceeds from borrowings	131,500	290,000
Repayments of borrowings	(66,500)	(60,000)
Payments for debt costs and credit agreement	0	(286)
Contributions by noncontrolling interests	221	708
Distributions to noncontrolling interests	(360)	(18,986)
Purchase of treasury stock	0	(813)
Taxes paid on vested stock	(1,149)	0
Net cash provided by financing activities	63,712	210,623
Effect of exchange rate changes	(1,179)	(182)
Net decrease in cash, cash equivalents, and restricted cash	(68,652)	(150,726)
Cash, cash equivalents and restricted cash:
Beginning of year	195,374	281,195
End of period	$ 126,722	$ 130,469