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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
EARNINGS PER SHARE
Net income	$ 9,808	$ 137,309
Weighted average shares outstanding - basic	41,915,000	41,816,000
SHARE-BASED COMPENSATION
Dilutive effect of Treasury warrants (in shares)		29,000
Weighted average shares outstanding - diluted	42,477,000	42,297,000
Basic earnings per share (in dollars per share)	$ 0.23	$ 3.28
Diluted earnings per share (in dollars per share)	$ 0.23	$ 3.25
Antidilutive securities excluded from the dilutive share calculation (in shares)	23,624	26,256
Employee stock options and awards
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements	562,000	447,000
Deferred salary restricted stock units
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements		5,000

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