NET (LOSS) INCOME PER SHARE - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic net (loss) income per share:
Net (loss) income applicable to common stockholders	$ (146)	$ 30,960	$ (106,793)	$ 45,740
Weighted average common shares outstanding (in shares)	52,874	55,197	53,015	55,233
Basic net (loss) per share (in usd per share)	$ 0.00	$ 0.56	$ (2.01)	$ 0.83
Diluted net (loss) income per share:
Net (loss) income applicable to common stockholders	$ (146)	$ 30,960	$ (106,793)	$ 45,740
Weighted average common shares outstanding (in shares)	52,874	55,197	53,015	55,233
Dilutive stock options and restricted stock (in shares)	0	471	0	486
Diluted weighted average common shares outstanding (in shares)	52,874	55,668	53,015	55,719
Diluted net (loss) income per share (in usd per share)	$ 0.00	$ 0.56	$ (2.01)	$ 0.82