CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Dec. 31, 2012	$ 141,377	$ 22,677	$ (82,860)	$ 124,059	$ (6,776)	$ 198,477
BALANCE (in shares) at Dec. 31, 2012	29,659,457
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(51,286)	0	(51,286)
Employee pension plan adjustments, net of taxes	0	0	0	0	3,214	3,214
Stock-based compensation expense
Restricted stock	$ 0	2,893	0	0	0	2,893
Restricted stock (in shares)	400,779
Stock options	$ 0	102	0	0	0	102
Tax deficiency of stock-based awards and canceled	0	(698)	0	0	0	(698)
Net share settlement for equity-based compensation	$ 0	(797)	0	0	0	(797)
Net share settlement for equity-based compensation (in shares)	(140,475)
Cash dividend	$ 0	0	0	(6,709)	0	(6,709)
BALANCE at Dec. 31, 2013	$ 141,377	24,177	(82,860)	66,064	(3,562)	145,196
BALANCE (in shares) at Dec. 31, 2013	29,919,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(56,133)	0	(56,133)
Employee pension plan adjustments, net of taxes	0	0	0	0	(3,905)	(3,905)
Stock-based compensation expense
Restricted stock	$ 0	2,517	0	0	0	2,517
Restricted stock (in shares)	158,308
Stock options	$ 0	104	0	0	0	104
Net share settlement for equity-based compensation	$ 0	(448)	0	0	0	(448)
Net share settlement for equity-based compensation (in shares)	(144,983)
Cash dividend	$ 0	0	0	(4,321)	0	(4,321)
BALANCE at Dec. 31, 2014	$ 141,377	26,350	(82,860)	5,610	(7,467)	$ 83,010
BALANCE (in shares) at Dec. 31, 2014	29,933,086					29,933,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(3,350)	0	$ (3,350)
Employee pension plan adjustments, net of taxes	0	0	0	0	395	395
Stock-based compensation expense
Restricted stock	$ 0	1,095	0	0	0	1,095
Restricted stock (in shares)	(119,791)
Stock options	$ 0	33	0	0	0	33
Net share settlement for equity-based compensation	$ 0	(186)	0	0	0	(186)
Net share settlement for equity-based compensation (in shares)	(85,740)
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					29,727,555