Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income (loss)	$ 6,747	$ (9,576)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation, depletion and amortization	32,328	52,853
Amortization related to long-term debt (see Note 15)	1,423	4,666
Gain on sale of discontinued operations (see Note 3)	(6,234)	0
Gain on sales of property and equipment, net	(9,513)	(34,190)
Deferred income taxes	2,545	0
Stock-based compensation	4,376	3,642
Equity in net (income) loss from unconsolidated joint ventures	17,228	(6,972)
Net loss from affiliates	(6,165)	(8,039)
Other non-cash adjustments	(84)	1,483
Changes in assets and liabilities:
Deposit/insurance receivable for legal settlement (see Note 18)	0	(63,000)
Receivables	(69,114)	(48,584)
Contract assets, net	(71,282)	(28,111)
Inventories	(18,618)	(6,062)
Contributions to unconsolidated construction joint ventures	(33,563)	(47,580)
Distributions from unconsolidated construction joint ventures and affiliates	6,522	7,029
Other assets, net	15,627	(7,197)
Accounts payable	17,983	26,056
Accrual for expected resolution of SEC investigation (see Note 18)	12,000	0
Accrual for legal settlement (see Note 18)	0	129,000
Accrued expenses and other liabilities, net	(5,484)	3,578
Net cash used in operating activities	(103,278)	(31,004)
Investing activities
Purchases of marketable securities	(49,968)	(5,000)
Purchases of property and equipment	(73,216)	(46,437)
Proceeds from sales of property and equipment	15,289	48,517
Proceeds from the sale of discontinued operations (see Note 3)	142,571	0
Issuance of notes receivable	(4,560)	0
Collection of notes receivable	201	4,581
Net cash provided by investing activities	30,317	1,661
Financing activities
Proceeds from long-term debt	50,000	0
Debt principal repayments	(124,660)	(4,677)
Cash dividends paid	(11,857)	(11,890)
Repurchases of common stock (See Note 1)	(70,374)	(2,497)
Contributions from non-controlling partners	6,327	11,350
Distributions to non-controlling partners	(6,700)	(5,836)
Other financing activities, net	209	(62)
Net cash used in financing activities	(157,055)	(13,612)
Net decrease in cash, cash equivalents and restricted cash	(230,016)	(42,955)
Cash, cash equivalents and $1,512 in restricted cash at beginning of each period	413,655	437,648
Cash, cash equivalents and $0 and $1,512 in restricted cash at end of each period	183,639	394,693
Less: Cash, cash equivalents and $0 and $1,512 in restricted cash included in current assets held-for-sale at end of each period	8,617	17,073
Cash and cash equivalents of continuing operations at end of period	175,022	377,620
Supplementary Information
Right of use assets obtained in exchange for lease obligations	8,167	7,997
Cash paid for operating lease liabilities	11,667	10,956
Cash paid during the period for:
Interest	6,786	8,078
Income taxes	1,553	1,817
Non-cash investing and financing activities:
RSUs issued, net of forfeitures	7,688	7,554
Dividends declared but not paid	5,730	5,956
Contributions from non-controlling partners	3,274	9,240
Accrued equipment purchases	$ (5,149)	$ 3,024