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GOODWILL
 3 Months Ended
Mar. 31, 2017
GOODWILL [Abstract]  
GOODWILL
4. GOODWILL

The changes in the carrying amount of goodwill consisted of the following (in thousands):

  
Three Months Ended
March 31, 2017
 
    
Beginning balance
 
$
226,806
 
Goodwill acquired during the period
  
17,586
 
Goodwill adjustments for purchase price allocation of business acquired
  
54
 
Goodwill written-off - closed clinics
  
-
 
Ending balance
 
$
244,446