Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income	$ 7,878	$ 59,681
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation, depletion and amortization	65,298	61,714
Amortization related to long-term debt	1,689	1,901
Loss on debt extinguishment	51,052	0
Gain on sale of business	0	(3,278)
Gain on sales of property and equipment, net	(7,793)	(10,462)
Deferred income taxes	1,542	(17,819)
Stock-based compensation	8,630	6,151
Equity in net (income) loss from unconsolidated joint ventures	(4,535)	25,066
Net income from affiliates	(19,378)	(9,656)
Other non-cash adjustments	5,659	38
Changes in assets and liabilities:
Receivables	(286,262)	(94,233)
Contract assets, net	8,315	(91,102)
Inventories	(3,421)	(8,795)
Contributions to unconsolidated construction joint ventures	(18,310)	(44,667)
Distributions from unconsolidated construction joint ventures and affiliates	8,903	7,960
Other assets, net	(6,705)	27,633
Accounts payable	144,721	60,973
Accrued expenses and other liabilities, net	76,915	14,264
Net cash provided by (used in) operating activities	34,198	(14,631)
Investing activities
Purchases of marketable securities	(9,740)	(59,810)
Maturities of marketable securities	40,000	15,000
Purchases of property and equipment	(108,963)	(97,753)
Proceeds from sales of property and equipment	14,613	21,110
Proceeds from company owned life insurance	1,545	0
Proceeds from the sale of business	0	142,571
Acquisition of business	(26,933)	0
Issuance of notes receivable	0	(7,560)
Collection of notes receivable	208	316
Net cash provided by (used in) investing activities	(89,270)	13,874
Financing activities
Proceeds from long-term debt	55,000	50,000
Debt principal repayments	(304,851)	(124,911)
Capped call transactions	(53,035)	0
Redemption of warrants	(13,201)	0
Proceeds from issuance of 3.75% Convertible Notes	373,750	0
Debt issuance costs	(10,024)	0
Cash dividends paid	(17,101)	(17,587)
Repurchases of common stock	(3,900)	(70,724)
Contributions from non-controlling partners	35,400	11,925
Distributions to non-controlling partners	(9,100)	(6,725)
Other financing activities, net	267	208
Net cash provided by (used in) financing activities	53,205	(157,814)
Net decrease in cash, cash equivalents and restricted cash	(1,867)	(158,571)
Cash, cash equivalents and $0 and $1,512 in restricted cash at beginning of period	293,991	413,655
Cash, cash equivalents and $0 in restricted cash at end of period	292,124	255,084
Supplementary Information
Right of use assets obtained in exchange for lease obligations	28,546	12,898
Operating lease liabilities	16,461	17,135
Interest	6,473	7,397
Income taxes	7,324	1,780
Other non-cash operating activities:
Performance guarantees	(6,513)	(4,678)
Deferred taxes related to capped call transactions	13,656	0
Non-cash investing and financing activities:
RSUs issued, net of forfeitures	11,447	8,258
Dividends declared but not paid	5,710	5,685
Contributions from non-controlling partners	2,523	4,109
Accrued equipment purchases	$ (2,204)	$ 897