DEBT (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2014
Scheduled principal payments [Abstract]
2016	[1]	$ 24,772
2017		18,813
2018		24,188
2019		119,415
Total long-term debt		187,188	$ 232,600
Less: Current maturities of long-term debt		(24,772)	(13,438)
Noncurrent portion of long-term debt		162,416	219,187
Long term debt, excess cash flow payment		8,600
Term Loan and DDTL [Member]
Scheduled principal payments [Abstract]
Total long-term debt		187,188	$ 209,600
KeyBank [Member]
Line of Credit Facility [Line Items]
Additional borrowings		$ 100,000
Percentage of capital stock of foreign subsidiaries given as collateralized security to line of credit		65.00%
Basis spread on variable rate		2.75%	2.75%
Interest on borrowings outstanding, percentage		3.19%	2.94%
Effective LIBOR rate		0.44%	0.19%
Line of credit, current borrowing capacity		$ 50,000
Deferred financing costs			$ 5,800
Deferred financing costs amortization period			5 years
Interest expense incurred		$ 7,600	$ 4,000
KeyBank [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.00%
KeyBank [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
KeyBank [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.00%
KeyBank [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.50%
KeyBank [Member] | Alternate Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.75%
KeyBank [Member] | Alternate Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.00%
KeyBank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maturity date				Jun. 18, 2019
Available line of credit		$ 50,000
Additional borrowings					$ 20,000
Line of credit, amount outstanding		0	23,000
KeyBank [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Available line of credit		145,000
Additional borrowings					90,000
KeyBank [Member] | Delayed Draw Term Loan [Member]
Line of Credit Facility [Line Items]
Available line of credit		$ 70,000
Additional borrowings					$ 70,000
Bank of America [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Available line of credit				$ 30,000
Line of credit, amount outstanding				$ 12,000
Line of credit facility, expiration date				Oct. 14, 2016
Repayments of line of credit			$ 12,000

[1] Includes an estimated $8.6 million excess cash flow payment due in 2016 based on 2015 results as per the terms of the CSA.