Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 395,647	$ 425,292
Receivables, net	464,588	437,558
Contract assets	145,437	132,097
Other current assets	177,210	37,767
Property and equipment, net	433,504	421,149
Accounts payable	324,313	321,347
Contract liabilities	200,041	162,925
Accrued expenses and other current liabilities	$ 452,829	$ 381,747
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)	45,840,260	45,668,541
Common stock, shares outstanding (in shares)	45,840,260	45,668,541
Consolidated Construction Corporate Joint Venture [Member]
Cash and cash equivalents	$ 92,783	$ 74,819
Receivables, net	49,534	56,147
Contract assets	50,054	33,838
Other current assets	8,091	13,252
Property and equipment, net	14,920	23,704
Accounts payable	55,012	53,033
Contract liabilities	69,328	79,777
Accrued expenses and other current liabilities	$ 5,514	$ 4,410