Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total USD ($)	Common stock USD ($)	Common stock Series A: Common Stock	Common stock Series B: Common Stock	Additional Paid-in Capital USD ($)	Accumulated Other Comprehensive Income/(Loss) USD ($)	Accumulated Deficit USD ($)
Balance at Dec. 31, 2009	$ 321,597	$ 207			$ 488,241	$ 3,364	$ (170,215)
Balance, shares at Dec. 31, 2009			18,248,970	2,507,590
Net loss	(9,299)						(9,299)
Other comprehensive loss:
Other post-employment benefits, net of tax	(365)					(365)
Total comprehensive loss	(9,664)
Issuance of shares for restricted stock units, shares			62,119
Issuance of shares for restricted stock units	19	1			18
Issuance of shares from stock option exercises, shares			208,773	44,290
Issuance of shares from stock option exercises	881	2			879
Income tax on options	(32)				(32)
Conversion of Series B to Series A			2,164	(2,164)
Share-based compensation	1,288				1,288
Balance at Jun. 30, 2010	314,089	210			490,394	2,999	(179,514)
Balance, shares at Jun. 30, 2010			18,522,026	2,549,716
Balance at Dec. 31, 2010	199,873	212			491,542	2,569	(294,450)
Balance, shares at Dec. 31, 2010			18,896,876	2,392,074
Net loss	(13,548)						(13,548)
Other comprehensive loss:
Other post-employment benefits, net of tax	(307)					(307)
Total comprehensive loss	(13,855)
Issuance of shares for restricted stock units, shares			220,661
Issuance of shares for restricted stock units		3			(3)
Issuance of shares from stock option exercises, shares			6,000
Issuance of shares from stock option exercises	12				12
Income tax on options	(24)				(24)
Conversion of Series B to Series A			571	(571)
Share-based compensation	1,561				1,561
Dividends	(1,351)						(1,351)
Balance at Jun. 30, 2011	$ 186,216	$ 215			$ 493,088	$ 2,262	$ (309,349)
Balance, shares at Jun. 30, 2011			19,124,108	2,391,503