CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Dec. 31, 2015	$ 141,377	$ 27,292	$ (82,860)	$ 2,260	$ (7,072)	$ 80,997
BALANCE (in shares) at Dec. 31, 2015	29,727,555
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(6,068)	0	(6,068)
Employee pension plan adjustments	0	0	0	0	222	222
Stock-based compensation expense
Restricted stock	$ 0	373	0	0	0	373
Restricted stock (in shares)	(26,200)
Net share settlement for equity-based compensation	$ 0	(101)	0	0	0	(101)
Net share settlement for equity-based compensation (in shares)	(35,278)
BALANCE at Mar. 31, 2016	$ 141,377	27,564	(82,860)	(3,808)	(6,850)	75,423
BALANCE (in shares) at Mar. 31, 2016	29,666,077
BALANCE at Dec. 31, 2016	$ 141,377	28,554	(82,860)	(26,044)	(6,101)	$ 54,926
BALANCE (in shares) at Dec. 31, 2016	30,685,017					30,685,017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(10,929)	0	$ (10,929)
Employee pension plan adjustments	0	0	0	0	220	220
Stock-based compensation expense
Restricted stock	$ 0	361	0	0	0	361
Restricted stock (in shares)	(2,398)
Net share settlement for equity-based compensation	$ 0	(429)	0	0	0	(429)
Net share settlement for equity-based compensation (in shares)	(184,231)
BALANCE at Mar. 31, 2017	$ 141,377	$ 28,486	$ (82,860)	$ (36,973)	$ (5,881)	$ 44,149
BALANCE (in shares) at Mar. 31, 2017	30,498,388					30,498,388