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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract]      
Purchase of treasury stock (in shares) 187,000us-gaap_TreasuryStockSharesAcquired    
Cost of treasury stock issued upon exercise of stock options and issuance of restricted stock $ 211,000us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised $ 261,000us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised $ 341,000us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised