SHARE-BASED COMPENSATION - Other Options Disclosures (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Options Disclosures [Line Items]
Fair value per option issued	$ 0	$ 0	$ 7.84
Intrinsic value of options exercised	$ 508	$ 528	$ 899
Tax benefit from options exercised, before impact of valuation allowance	192	209	355
Cash received from exercise price of options exercised	$ 135	$ 71	$ 130
Number of options issued	0	0	3
Maximum
Other Options Disclosures [Line Items]
Exercise price range of options issued	$ 0	$ 0	$ 12.08
General vesting period in years	0	0	10
Minimum
Other Options Disclosures [Line Items]
Exercise price range of options issued	$ 0	$ 0	$ 12.08
General vesting period in years	0	0	1