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SHARE-BASED COMPENSATION - Other Options Disclosures (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Other Options Disclosures [Line Items]    
Intrinsic value of options exercised $ 1,272 $ 405
Cash received from exercise price of options exercised 242 65
Tax benefit from options exercised $ 73 $ 107