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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
EARNINGS PER SHARE
Net income	$ 9,150	$ 14,267	$ 18,958	$ 151,576
Weighted average shares outstanding - basic	36,117,000	41,957,000	39,000,000	41,886,000
SHARE-BASED COMPENSATION
Dilutive effect of Treasury warrants (in shares)		25,000		28,000
Weighted average shares outstanding - diluted	36,656,000	42,320,000	39,405,000	42,235,000
Basic earnings per share (in dollars per share)	$ 0.25	$ 0.34	$ 0.49	$ 3.62
Diluted earnings per share (in dollars per share)	$ 0.25	$ 0.34	$ 0.48	$ 3.59
Antidilutive securities excluded from the dilutive share calculation (in shares)	22,864	26,256	22,864	26,256
Employee stock options and awards
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements	539,000	338,000	405,000	318,000
Deferred salary restricted stock units
SHARE-BASED COMPENSATION
Dilutive effect of share-based compensation arrangements				3,000

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