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STOCK-BASED COMPENSATION Defined contribution plan and non-cash employer-matching contributions (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Discolusre of Compensation Related Costs, Share-based Payments [Abstract]    
Share-based compensation arrangement award vesting period 5 years  
Defined contribution pan, maximum annual contribution per employee percent 15.00%  
Defined contribution plan, employer matching contribution percent 3.00%  
Expense recognized for the 401(k) plan $ 190 $ 193
Number of shares of the Company's common stock issued 0 124
Market value per share of the Company's common stock on contribution date (in dollars) $ 0.00 $ 5.35
Non-cash contribution made for employer matching liability 0 666
Other Postretirement Benefits Payments 651 0
Cash and Noncash pension and other postretirement contributions $ 651 $ 666