CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 128,812	$ 641,207
Other comprehensive income (loss):
Unrealized losses on investments	(81,041)	(10,071)
Unrealized gains on cash flow hedges	52,530	23,423
Total unrealized gains (losses)	(28,511)	13,352
Income tax (expense) benefit	6,894	(3,229)
Other comprehensive income (loss), net of tax (expense) benefit	(21,617)	10,123
Total comprehensive income	$ 107,195	$ 651,330