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401(K) RETIREMENT SAVINGS PLAN (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
401(K) RETIREMENT SAVINGS PLAN      
Employee's elective deferrals (as a percent) 100.00%    
Matching contributions by employer (as a percent) 4.00%    
Employer matching contributions to the Retirement Savings Plan $ 1.7 $ 1.6 $ 1.4