Consolidated Statement of Shareholders' Equity (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, 2009	$ 27,858	$ 2,923	$ 70,172	$ 0	$ (11,218)	$ 89,735
Balance (in shares) at Dec. 31, 2009	18,572				1,477
Net loss	0	0	(11,930)	0	0	(11,930)
Treasury stock reacquired	0	0	0	0	(76)	(76)
Treasury stock reacquired (in shares)					21
Retirement plans	0	(12)	0	0	4	(8)
Retirement plans (in shares)					(1)
Exercise of stock options	0	(1,146)	0	0	1,817	671
Exercise of stock options (in shares)					(241)
Restricted stock	0	(352)	0	0	829	477
Restricted stock (in shares)					(110)
Tax (expense) benefit of stock-based awards	0	(60)	0	0	0	(60)
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-based awards	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	(15,056)	0	0	(15,056)
Treasury stock reacquired	0	0	0	0	(5)	(5)
Treasury stock reacquired (in shares)					4
Retirement plans	0	220	0	(12)	(287)	(79)
Retirement plans (in shares)					41
Restricted stock	0	575	0	0	(9)	566
Restricted stock (in shares)					1
Tax (expense) benefit of stock-based awards	0	(57)	0	0	0	(57)
Balance at Dec. 31, 2012	$ 27,858	$ 1,165	$ 6,516	$ (79)	$ (7,189)	$ 28,271
Balance (in shares) at Dec. 31, 2012	18,572				1,026