STOCK-BASED COMPENSATION - STOCK OPTION AWARDS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding, Weighted Average Remaining Contractual Term (in years), beginning of period	1 year 11 months 16 days	2 years 3 months 26 days
Stock Options, Outstanding, Weighted Average Remaining Contractual Term (in years), end of period	1 year 11 months 16 days	2 years 3 months 26 days
Total Unrecognized Compensation Cost	$ 0
Stock Options, Total Intrinsic Value	2,300,000	2,100,000	2,800,000
Expected Forfeiture Rate Employees	4.00%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Stock Options Outstanding, beginning of period	145,000
Stock Options, Shares Excerised	(47,000)
Number of Stock Options Outstanding and Vested, end of period	97,000
Stock Options, Weighted Average Exercise Price, Outstanding beginning of period	$ 12.12
Stock Options, Weighted Average Exercise Price, Exercised	$ 6.01
Stock Options, Weighted Average Exercise Price, Outstanding and Vested end of period	$ 15.10
Stock Options, Outstanding, Aggregate Intrinsic Value, beginning of period	7,469,000
Stock Options, Outstanding, Aggregate Intrinsic Value, end of period	$ 3,880,000