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GOODWILL (Tables)
9 Months Ended
Sep. 30, 2017
GOODWILL [Abstract]  
Summary of Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill consisted of the following (in thousands):

  
Nine Months Ended
September 30, 2017
 
    
Beginning balance
 
$
226,806
 
Goodwill acquired during the period
  
40,384
 
Goodwill adjustments for purchase price allocation of business acquired
  
860
 
Ending balance
 
$
268,050