Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 156,575	$ 247,919	$ 147,874
Other comprehensive income, net of tax:
Net derivative loss reclassified into earnings	184	1,166	2,202
Other comprehensive income	184	1,166	2,202
Total comprehensive income	$ 156,759	$ 249,085	$ 150,076