Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ (460,821)	$ 128,294	$ 264,670
Other comprehensive income (loss), before tax:
Gains (losses) arising during the period	(2,901)	693	(2,231)
Amount reclassified from accumulated other comprehensive loss	194	97	(64)
Total gain (loss) on minimum pension liability	(2,707)	790	(2,295)
Interest rate derivatives:
Gains (losses) arising during period	(39,958)	3,539
Amount reclassified from accumulated other comprehensive loss	10,505	(1,905)
Total income (loss) from interest rate derivatives	(29,453)	1,634
Other-than-temporary impairment loss on held-to-maturity securities:
Amount reclassified from accumulated other comprehensive loss	210	333	333
Total non-credit loss on other-than-temporary impairment	210	333	333
Other comprehensive income (loss), before tax	(31,950)	2,757	(1,962)
Income tax (provision) benefit related to items of comprehensive loss		(185)	630
Other comprehensive income (loss), net of tax	(31,950)	2,572	(1,332)
Comprehensive income (loss)	(492,771)	130,866	263,338
Comprehensive income (loss) available to common stockholders	(442,913)	149,194	$ 263,338
Consolidated Joint Venture [Member]
Other-than-temporary impairment loss on held-to-maturity securities:
Comprehensive loss attributable to noncontrolling interest	48,989	$ 18,328
Operating Partnership [Member]
Other-than-temporary impairment loss on held-to-maturity securities:
Comprehensive loss attributable to noncontrolling interest	$ 869