CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 141,812	$ 34,310	$ (636,142)	$ 120,040
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale securities	8,236	4,484	(19,890)	19,764
Reclassification of unrealized gain on available-for-sale securities to net income	(445)	(3,492)	(11,525)	(15,807)
Net unrealized loss on interest rate agreements	0	(11,791)	(32,806)	(27,130)
Reclassification of unrealized loss on interest rate agreements to net income	1,040	0	2,148	0
Total other comprehensive income (loss)	8,831	(10,799)	(62,073)	(23,173)
Total Comprehensive Income (Loss)	$ 150,643	$ 23,511	$ (698,215)	$ 96,867