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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]    
Balance at beginning of period $ 105,950 $ 98,445
Measurement period adjustments [1] 0 7,505
Balance at end of period $ 105,950 $ 105,950
[1] See Note 22 for details on the measurement period adjustments.