CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 362,173	$ 158,189
Other comprehensive income (loss):
Unrealized gains (losses) on investments	4,803	2,938
Unrealized gains (losses) on cash flow hedges	(45,694)	(14,117)
Total unrealized gains (losses)	(40,891)	(11,179)
Income tax benefit (expense)	9,984	2,733
Other comprehensive income (loss), net of tax benefit (expense)	(30,907)	(8,446)
Total comprehensive income	$ 331,266	$ 149,743