CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (85,211)	$ 150,277	$ 276,962	$ 308,466
Other comprehensive income (loss):
Unrealized gains on investments	1,211	3,164	6,014	6,102
Unrealized losses on cash flow hedges	(2,343)	(24,013)	(48,037)	(38,130)
Total unrealized losses	(1,132)	(20,849)	(42,023)	(32,028)
Income tax benefit	335	5,093	10,319	7,826
Other comprehensive loss, net of tax benefit	(797)	(15,756)	(31,704)	(24,202)
Total comprehensive income (loss)	$ (86,008)	$ 134,521	$ 245,258	$ 284,264