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GOODWILL (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Goodwill [Roll Forward]  
Beginning balance $ 147,914us-gaap_Goodwill
Goodwill acquired during the period 10,936us-gaap_GoodwillAcquiredDuringPeriod
Goodwill adjustments for business acquired in 2014 360us-gaap_GoodwillPurchaseAccountingAdjustments
Goodwill written off (34)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Ending balance $ 159,176us-gaap_Goodwill