Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash flow hedge gains expected to reclassified out of AOCI over next 12 months	$ 62,500
Balance, beginning of period, net of tax	8,433,491	$ 6,621,080
Balance, end of period, net of tax	10,120,779	7,183,221
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period, net of tax	129,273	(2,130)
Net increase in fair value, net of tax	0	167,639
Net realized gain reclassified to net income, net of tax	(11,305)	(1,510)
Balance, end of period, net of tax	$ 117,968	$ 163,999