Stockholders' Equity and EPS - Activity Related to Net Gains on Cash Flow Hedges in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cash flow hedge gains expected to reclassified out of AOCI over next 12 months	$ 3,200
Balance, beginning of period, net of tax	5,264,843	$ 4,319,415	$ 3,777,037
Balance, end of period, net of tax	6,621,080	5,264,843	4,319,415
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period, net of tax	0	0	0
Net decrease in fair value, net of tax	(5,999)	0	0
Net realized loss reclassified to net income, net of tax	3,869	0	0
Balance, end of period, net of tax	$ (2,130)	$ 0	$ 0