Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Total stockholders' equity, beginning balance at Dec. 31, 2011	$ 142,213	$ 270	$ 1,337,935	$ (1,207,179)	$ (3,271)	$ 14,458
Common stock, shares outstanding at Dec. 31, 2011		7,888,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares, shares		(332,000)
Purchase of treasury shares, value	(3,257)				(3,257)
Share-based compensation expense, shares		38,000
Share-based compensation expense, value	1,192		1,192
Dividend to common stockholders	(57,957)		(57,957)
Net loss	5,664			5,664
Other comprehensive income (loss)	(14,954)					(14,954)
Total stockholders' equity, ending balance at Dec. 31, 2012	72,901	270	1,281,170	(1,201,515)	(6,528)	(496)
Common stock, shares outstanding at Dec. 31, 2012		7,594,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares, shares		(389,000)
Purchase of treasury shares, value	(3,884)				(3,884)
Share-based compensation expense, shares		81,000
Share-based compensation expense, value	713		713
Net loss	(6,822)			(6,822)
Other comprehensive income (loss)	882					882
Total stockholders' equity, ending balance at Dec. 31, 2013	63,790	270	1,281,883	(1,208,337)	(10,412)	386
Common stock, shares outstanding at Dec. 31, 2013	7,286,000	7,286,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and warrants, shares		100,000
Exercise of stock options and warrants, value	1,641		1,641
Share-based compensation expense, value	959		959
Net loss	(12,155)			(12,155)
Other comprehensive income (loss)	(3,265)					(3,265)
Total stockholders' equity, ending balance at Dec. 31, 2014	$ 50,970	$ 270	$ 1,284,483	$ (1,220,492)	$ (10,412)	$ (2,879)
Common stock, shares outstanding at Dec. 31, 2014	7,386,000	7,386,000