EARNINGS 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
Earnings (loss) per share — Basic:
Earnings (loss) from continuing operations	$ (73,705)	$ 75,452	$ (182,834)	$ 121,342
Less: Distributed and undistributed earnings allocated to unvested stock	(130)	(286)	(248)	(464)
Earnings (loss) from continuing operations available to common shareholders — Basic	$ (73,835)	$ 75,166	$ (183,082)	$ 120,878
Weighted average common shares outstanding - Basic (in shares)	52,355	52,337	52,320	52,377
Earnings from continuing operations per common share - Basic (in dollars per share)	$ (1.41)	$ 1.44	$ (3.50)	$ 2.31
Earnings (loss) per share — Diluted:
Earnings (loss) from continuing operations	$ (73,705)	$ 75,452	$ (182,834)	$ 121,342
Less: Distributed and undistributed earnings allocated to unvested stock	(130)	(286)	(248)	(464)
Earnings (loss) from continuing operations available to common shareholders — Diluted	$ (73,835)	$ 75,166	$ (183,082)	$ 120,878
Weighted average common shares outstanding - Basic (in shares)	52,355	52,337	52,320	52,377
Effect of dilutive equity awards (in shares)	0	212	0	218
Weighted average common shares outstanding — Diluted (in shares)	52,355	52,549	52,320	52,595
Earnings (loss) from continuing operations per common share - Diluted (in dollars per share)	$ (1.41)	$ 1.43	$ (3.50)	$ 2.30
Anti-dilutive equity awards not included above (in shares)	3,612	1,724	3,498	1,703