Consolidated Condensed Statement of Shareholders' Equity (unaudited) (USD $) In Thousands	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 27,858	$ 1,353	$ 58,242	$ 0	$ (8,644)	$ 78,809
Balance (in shares) at Dec. 31, 2010	18,572				1,146
Net loss	0	0	(36,670)	0	0	(36,670)
Treasury stock reacquired	0	0	0	0	(634)	(634)
Treasury stock reacquired (in shares)					168
Retirement plans	0	(62)	0	(67)	104	(25)
Retirement plans (in shares)					(14)
Exercise of stock options	0	(1,362)	0	0	1,966	604
Exercise of stock options (in shares)					(278)
Restricted stock	0	465	0	0	320	785
Restricted stock (in shares)					(42)
Tax (expense)/benefit of stock options	0	33	0	0	0	33
Balance at Dec. 31, 2011	27,858	427	21,572	(67)	(6,888)	42,902
Balance (in shares) at Dec. 31, 2011	18,572				980
Net loss	0	0	(5,649)	0	0	(5,649)
Treasury stock reacquired	0	0	0	0	(3)	(3)
Treasury stock reacquired (in shares)					3
Retirement plans	0	(38)	0	0	51	13
Retirement plans (in shares)					(12)
Restricted stock	0	136	0	0	(7)	129
Restricted stock (in shares)					1
Tax (expense)/benefit of stock options	0	(62)	0	0	0	(62)
Balance at Mar. 31, 2012	$ 27,858	$ 463	$ 15,923	$ (67)	$ (6,847)	$ 37,330
Balance (in shares) at Mar. 31, 2012	18,572				972