CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1,160,513	$ 880,690	$ 578,276
Other comprehensive income (loss):
Unrealized gains (losses) on investments	(26,606)	7,764	7,993
Unrealized gains (losses) on cash flow hedges	48,111	(36,511)	(38,414)
Total unrealized gains (losses)	21,505	(28,747)	(30,421)
Income tax (expense) benefit	(5,202)	6,914	7,431
Other comprehensive income (loss), net of tax (expense) benefit	16,303	(21,833)	(22,990)
Total comprehensive income	$ 1,176,816	$ 858,857	$ 555,286