Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to common stockholders	$ 28,990	$ (2,896)	$ 13,835	$ 32,545
Other comprehensive (loss) income:
Unrealized (loss) gain on derivatives, net of income taxes	(25,178)		(68,301)
Unrealized (loss) gain on derivatives, net of income taxes		8,495		30,328
Interest expense (income) on derivatives recognized into earnings, net of income taxes	212		(755)
Interest expense (income) on derivatives recognized into earnings, net of income taxes		(697)		(2,352)
Other comprehensive (loss) income	(24,966)	7,798	(69,056)	27,976
Comprehensive income (loss)	$ 4,024	$ 4,902	$ (55,221)	$ 60,521