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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings per share — Basic:
Earnings from continuing operations	$ 33,932	$ 38,536
Less: Earnings allocated to unvested stock	(118)	(132)
Earnings from continuing operations available to common shareholders — Basic	$ 33,814	$ 38,404
Weighted average common shares outstanding - Basic (shares)	52,405	52,945
Continuing operations	$ 0.65	$ 0.73
Earnings per share — Diluted:
Earnings from continuing operations	$ 33,932	$ 38,536
Less: Earnings allocated to unvested stock	(118)	(132)
Earnings from continuing operations available to common shareholders — Diluted	$ 33,814	$ 38,404
Weighted average common shares outstanding - Basic (shares)	52,405	52,945
Effect of dilutive equity awards (shares)	608	451
Weighted average common shares outstanding — Diluted (shares)	53,013	53,396
Continuing operations	$ 0.64	$ 0.72
Anti-dilutive equity awards not included above (shares)	1,046	591

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