STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - Summary of Dividends Paid (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Dividend payments to shareholders	[1]	$ 9,432	$ 9,277	$ 9,174

[1] On January 1, 2018, the Company adopted the ASC 606 revenue recognition standard and adjusted prior periods to conform. See "Note 2. Significant Accounting Policies" for additional information.