Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Details)

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EMPLOYEE BENEFIT PLANS (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
401(k) plans      
Employer's matching contribution (as a percent) 60.00%    
Maximum contribution by employer as a percentage of employee's compensation 5.00%    
Employer's matching contribution before change (as a percent) 50.00%    
Vesting period of employer's contributions 3 years    
Contributions by employer $ 551 $ 438 $ 1,065
Nonqualified deferred compensation plan      
Maximum percentage of annual salary and bonus that may be deferred 100.00%    
Period for payment of obligation upon separation, one 3 years    
Period for payment of obligation upon separation, two 5 years    
Deferred compensation plan assets $ 1,276 $ 1,429