Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 1,016,700	$ 1,022,023	$ 447,221
Other comprehensive income, net of tax:
Change in value of derivatives	100	100	81
Other comprehensive income	100	100	81
Comprehensive income	$ 1,016,800	$ 1,022,123	$ 447,302