Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash flow hedge gains expected to reclassified out of AOCI over next 12 months	$ 63,500
Balance, beginning of period, net of tax	7,468,313	$ 5,706,175	$ 6,621,080	$ 5,264,843
Balance, end of period, net of tax	7,967,380	6,048,469	7,967,380	6,048,469
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period, net of tax	152,556	13,828	(2,130)	0
Net increase in fair value, net of tax	0	7,077	167,639	20,536
Net realized (gain) loss reclassified to net income, net of tax	(11,568)	1,958	(24,521)	2,327
Balance, end of period, net of tax	$ 140,988	$ 22,863	$ 140,988	$ 22,863