DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Summary of Adjustments to Conform to New Guidance [Abstract]
Retained earnings	$ 147,807	$ 168,695
ASU 2016-09 [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Cumulative effect adjustment	0
ASU 2016-09 [Member] | Retained Earnings [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Cumulative effect adjustment	1,696
ASU 2016-09 [Member] | Additional Paid-in Capital [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Cumulative effect adjustment	(1,696)
ASU 2016-09 [Member] | Adjustments Due to ASC 606 [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Retained earnings	$ 3,400
ASU 2016-02 [Member] | Plan [Member] | Minimum [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Right-of-use assets		18,000
Lease liabilities		18,000
ASU 2016-02 [Member] | Plan [Member] | Maximum [Member]
Summary of Adjustments to Conform to New Guidance [Abstract]
Right-of-use assets		22,000
Lease liabilities		$ 22,000