CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (42,417)	$ 13,920	$ (212,013)	$ 36,271
Net change in fair value of interest rate swaps, net of income tax (expense) benefit of ($977), $1,276, $6,218 and $5,344, respectively	2,847	(3,839)	(18,127)	(16,075)
Comprehensive income (loss)	$ (39,570)	$ 10,081	$ (230,140)	$ 20,196