CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2008	$ 967	$ 51,919	$ (22,268)	$ 50,857	$ 81,475
Balance (in shares) at Dec. 31, 2008	9,675,000				9,675,000
Comprehensive income:
Net income	0	0	0	10,172	10,172
Other comprehensive income, net of tax and reclassification adjustments:
Pension liability adjustment	0	0	1,587	0	1,587
Changes in unrealized loss on derivative instruments adjustment	0	0	176	0	176
Other comprehensive income					1,763
Comprehensive income					11,935
Issuance of common stock through stock plan transactions	19	231	0	0	250
Issuance of common stock through stock plan transactions (in shares)	190,000
Issuance of restricted stock	10	(10)	0	0	0
Issuance of restricted stock (in shares)	101,000
Repurchased shares			0	0
Forfeiture of restricted stock	(2)	2	0	0	0
Forfeiture of restricted stock (in shares)	(24,000)
Release of restricted stock	(2)	(171)	0	0	(173)
Release of restricted stock (in shares)	(19,000)
Share-based compensation	0	736		0	736
Tax benefit from stock plan transactions		(127)	0	0	(127)
Balance at Dec. 31, 2009	992	52,580	(20,505)	61,029	94,096
Balance (in shares) at Dec. 31, 2009	9,923,000				9,923,000
Comprehensive income:
Net income	0	0	0	12,705	12,705
Other comprehensive income, net of tax and reclassification adjustments:
Pension liability adjustment	0	0	(1,247)	0	(1,247)
Changes in unrealized loss on derivative instruments adjustment	0	0	61	0	61
Other comprehensive income					(1,186)
Comprehensive income					11,519
Issuance of common stock through stock plan transactions	17	1,463	0	0	1,480
Issuance of common stock through stock plan transactions (in shares)	171,000
Issuance of restricted stock	3	(3)	0	0	0
Issuance of restricted stock (in shares)	30,000
Repurchased shares	(4)	(546)	0	0	(550)
Repurchased shares (in shares)	(40,000)
Forfeiture of restricted stock	(2)	2	0	0	0
Forfeiture of restricted stock (in shares)	(24,000)
Release of restricted stock	(2)	(219)	0	0	(221)
Release of restricted stock (in shares)	(20,000)
Share-based compensation	0	718	0		718
Tax benefit from stock plan transactions	0	143	0	0	143
Balance at Dec. 31, 2010	1,004	54,138	(21,691)	73,734	107,185
Balance (in shares) at Dec. 31, 2010	10,040,029				10,040,029
Comprehensive income:
Net income				11,457	11,457
Other comprehensive income, net of tax and reclassification adjustments:
Pension liability adjustment	0	0	(6,024)	0	(6,024)
Changes in unrealized loss on derivative instruments adjustment	0	0	285	0	285
Other comprehensive income					5,739
Comprehensive income					5,718
Issuance of common stock through stock plan transactions	28	1,803	0	0	1,831
Issuance of common stock through stock plan transactions (in shares)	281,000
Issuance of restricted stock	5	(5)	0	0	0
Issuance of restricted stock (in shares)	50,000
Repurchased shares	(2)	(309)	0	0	(311)
Repurchased shares (in shares)	(21,000)
Forfeiture of restricted stock	(2)	2	0	0	0
Forfeiture of restricted stock (in shares)	(15,000)
Release of restricted stock	(1)	(183)	0	0	(184)
Release of restricted stock (in shares)	(13,000)
Share-based compensation	0	686	0	0	686
Common stock subject to recession rights	0	(1,194)	0	0	(1,194)
Tax benefit from stock plan transactions	0	590	0	0	590
Balance at Dec. 31, 2011	$ 1,032	$ 55,528	$ (27,430)	$ 85,191	$ 114,321
Balance (in shares) at Dec. 31, 2011	10,321,749				10,321,749