Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash flow hedge gains expected to reclassified out of AOCI over next 12 months	$ 63,300
Balance, beginning of period, net of tax	6,621,080	$ 5,264,843	$ 4,319,415
Balance, end of period, net of tax	8,433,491	6,621,080	5,264,843
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period, net of tax	(2,130)	0	0
Net increase (decrease) in fair value, net of tax	167,639	(5,999)	0
Net realized (gain) loss reclassified to net income, net of tax	(36,236)	3,869	0
Balance, end of period, net of tax	$ 129,273	$ (2,130)	$ 0