CHANGES IN ACCUMULATED OTHER COMPREHENSIVE LOSS (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassification out of AOCI
Sales	$ 86,794	$ 67,211	$ 70,186	$ 67,822	$ 86,960	$ 76,805	$ 82,356	$ 69,128	$ 292,013	$ 315,249	$ 311,633
Other expense, net									(310)	(632)	(514)
Income (loss) from continuing operations before income taxes									3,067	4,438	(1,125)
Income taxes									(1,843)	(1,828)	(1,233)
Net income (loss)	$ 3,707	$ (1,383)	$ 145	$ (1,245)	$ 2,759	$ (327)	$ 1,586	$ (1,408)	1,224	2,610	(2,140)
Unrealized gain (loss) on cash flow hedges | Amount reclassified from AOCI
Reclassification out of AOCI
Sales									27	(120)	43
Other expense, net									(102)	(92)	106
Income (loss) from continuing operations before income taxes									(75)	(212)	149
Income taxes									(16)	36	(8)
Net income (loss)									(91)	(176)	141
Retirement plans related adjustments | Amount reclassified from AOCI
Reclassification out of AOCI
Amortization of prior service credit									311	318	399
Amortization of transition asset									253	258	276
Amortization of actuarial loss									(4,259)	(3,238)	(2,063)
Income (loss) from continuing operations before income taxes									(3,695)	(2,662)	(1,388)
Income taxes									426	187	65
Net income (loss)									$ (3,269)	$ (2,475)	$ (1,323)