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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings (loss) per share — Basic:
Earnings (loss) from continuing operations	$ (91,538)	$ 91,602	$ 29,804	$ 175,084
Less: Distributed and undistributed earnings allocated to unvested stock	(114)	(333)	(336)	(630)
Earnings (loss) from continuing operations available to common shareholders — Basic	$ (91,652)	$ 91,269	$ 29,468	$ 174,454
Weighted average common shares outstanding - Basic (in shares)	52,319	52,397	52,358	52,391
Earnings from continuing operations per common share - Basic (in dollars per share)	$ (1.75)	$ 1.74	$ 0.56	$ 3.33
Earnings (loss) per share — Diluted:
Earnings (loss) from continuing operations	$ (91,538)	$ 91,602	$ 29,804	$ 175,084
Less: Distributed and undistributed earnings allocated to unvested stock	(114)	(333)	(336)	(630)
Earnings (loss) from continuing operations available to common shareholders — Diluted	$ (91,652)	$ 91,269	$ 29,468	$ 174,454
Weighted average common shares outstanding - Basic (in shares)	52,319	52,397	52,358	52,391
Effect of dilutive equity awards (in shares)	0	373	199	349
Weighted average common shares outstanding — Diluted (in shares)	52,319	52,770	52,557	52,740
Earnings (loss) from continuing operations per common share - Diluted (in dollars per share)	$ (1.75)	$ 1.73	$ 0.56	$ 3.31
Anti-dilutive equity awards not included above (in shares)	3,170	1,197	1,945	1,230

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