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STOCK APPRECIATION RIGHTS - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 01, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period for stock options issued	10 years
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense associated with SARs				$ 318
SARs granted in period (in shares)		0	0