Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 199,751	$ 293,991
Receivables, net	397,231	463,987
Contract assets	288,146	241,916
Property and equipment, net	531,457	509,210
Accounts payable	295,125	334,392
Contract liabilities	160,245	173,286
Accrued expenses and other current liabilities	$ 266,541	$ 288,469
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	3,000,000	3,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	43,880,224	43,743,907
Common stock, shares outstanding (in shares)	43,880,224	43,743,907
Consolidated Construction Corporate Joint Venture [Member]
Cash and cash equivalents	$ 112,340	$ 102,547
Receivables, net	25,488	39,281
Contract assets	86,027	80,306
Property and equipment, net	7,540	7,834
Accounts payable	43,009	57,534
Contract liabilities	46,943	62,675
Accrued expenses and other current liabilities	$ 7,570	$ 8,451