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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Fair Value Disclosures [Abstract]    
Financial assets measured at fair value on recurring basis $ 0 $ 0
Financial liabilities measured at fair value on recurring basis 0 0
Financial assets measured at fair value on nonrecurring basis 0 0
Financial liabilities measured at fair value on nonrecurring basis $ 0 $ 0