Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 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	6,621,080	$ 5,264,843
Balance, end of period, net of tax	7,183,221	5,483,823
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
Net increase in fair value, net of tax	167,639	795
Net realized (gain) loss reclassified to net income, net of tax	(1,510)	2
Balance, end of period, net of tax	$ 163,999	$ 797