Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net loss	$ (29,442)	$ (25,772)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation, depletion and amortization	29,068	19,733
Amortization related to long-term debt	758	472
Gain on sales of property and equipment, net	(1,418)	(2,037)
Stock-based compensation	12,895	4,828
Equity in net income from unconsolidated construction joint ventures	(2,290)	(911)
Net income from affiliates	(3,970)	(5,187)
Other non-cash adjustments	(691)	(151)
Changes in assets and liabilities:
Receivables	169,965	66,800
Contract assets, net	(62,882)	(59,307)
Inventories	(13,066)	(11,083)
Contributions to unconsolidated construction joint ventures	(2,000)	(3,350)
Distributions from unconsolidated construction joint ventures and affiliates	7,914	2,478
Other assets, net	(7,134)	(5,724)
Accounts payable	(60,029)	(42,955)
Accrued expenses and other liabilities, net	(13,605)	(14,522)
Net cash provided by (used in) operating activities	24,073	(76,688)
Investing activities
Maturities of marketable securities	20,000	10,000
Purchases of property and equipment	(27,871)	(40,461)
Proceeds from sales of property and equipment	2,535	4,518
Proceeds from company owned life insurance	0	1,545
Return of investment in affiliates	693	0
Cash paid for purchase price adjustments on business acquisition (See Note 3)	(6,119)	0
Collection of notes receivable	0	62
Net cash used in investing activities	(10,762)	(24,336)
Financing activities
Debt principal repayments	(102,140)	(256)
Cash dividends paid	(5,713)	(5,687)
Repurchases of common stock	(7,416)	(3,523)
Contributions from non-controlling partners	10,000	17,600
Distributions to non-controlling partners	(3,950)	(1,350)
Other financing activities, net	(3)	0
Net cash provided by (used in) financing activities	(109,222)	6,784
Net decrease in cash, cash equivalents	(95,911)	(94,240)
Cash and cash equivalents at beginning of period	417,663	293,991
Cash and cash equivalents at end of period	321,752	199,751
Supplementary Information
Right of use assets obtained in exchange for lease obligations	6,498	3,388
Operating lease liabilities	5,681	5,824
Interest	4,099	1,012
Income taxes	831	166
Non-cash investing and financing activities:
RSUs issued, net of forfeitures	17,987	9,552
Dividends declared but not paid	5,739	5,704
Contributions from non-controlling partners	$ 888	$ 1,324