Business Segments Reconciliation of Segment Information to Consolidated Amounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Income (loss) from construction operations	$ 226,804	$ 262,344	$ (365,007)
Other income (expense)	2,004	(11,853)	6,667
Interest expense	(69,026)	(76,212)	(67,494)
Income (loss) before income taxes	$ 159,782	$ 174,279	$ (425,834)