SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Supplemental Cash Flow Elements [Abstract]
Cash paid for income taxes			$ 1,414	$ 3,196
Cash paid for interest			4,937	3,987
Loss associated with disposal of assets			18	0
Amortization of deferred financing costs	$ 215	$ 215	430	430
Deferred income taxes	$ 249	$ (50)	307	(96)
Other			$ 755	$ 334