CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ (8,790)	$ 2,329	$ (13,194)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3,333)	(3,326)	(3,718)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(28)	5	158
Other Comprehensive Income (Loss), Net of Tax	(3,361)	(3,321)	(3,560)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (12,151)	$ (992)	$ (16,754)