Consolidated Statements Of Shareholders' Equity And Comprehensive Income (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net Of Tax [Member]	Total
Balance at Dec. 31, 2009	$ 6,000	$ 15,437,000	$ 48,484,000	$ (3,808,000)	$ 60,119,000
Balance, shares at Dec. 31, 2009	5,915,878
Common shares issued upon exercise of options		1,025,000			1,025,000
Common shares issued upon exercise of options, shares	125,505
Common shares issued upon exercise of Stock Appreciation Rights, shares	9,189
Share-based compensation expense		532,000			532,000
Common shares received as payment for stock options		(100,000)	(299,000)		(399,000)
Common shares received as payment for stock options, shares	(37,602)
Purchase and retirement of common shares		(141,000)	(393,000)		(534,000)
Purchase and retirement of common shares, shares	(52,995)
Cash dividends declared ($.54 per share)			(3,196,000)		(3,196,000)
Comprehensive Income (Loss):
Net earnings			3,807,000		3,807,000
Net change during the period related to:
Pensions, net of tax benefit				(254,000)	(254,000)
Comprehensive Income:					3,553,000
Balance at Dec. 31, 2010	6,000	16,753,000	48,403,000	(4,062,000)	61,100,000
Balance, shares at Dec. 31, 2010	5,959,975				5,959,975
Common shares issued upon exercise of options		1,056,000			1,056,000
Common shares issued upon exercise of options, shares	117,846
Common shares issued upon exercise of Stock Appreciation Rights, shares	425
Share-based compensation expense		1,005,000			1,005,000
Warrants issued		800,000			800,000
Common shares received as payment for stock options		(26,000)	(73,000)		(99,000)
Common shares received as payment for stock options, shares	(8,491)
Purchase and retirement of common shares		(241,000)	(641,000)		(882,000)
Purchase and retirement of common shares, shares	(76,693)
Cash dividends declared ($.54 per share)			(3,235,000)		(3,235,000)
Comprehensive Income (Loss):
Net earnings			4,136,000		4,136,000
Net change during the period related to:
Pensions, net of tax benefit				(2,835,000)	(2,835,000)
Comprehensive Income:					1,301,000
Balance at Dec. 31, 2011	$ 6,000	$ 19,347,000	$ 48,590,000	$ (6,897,000)	$ 61,046,000
Balance, shares at Dec. 31, 2011	5,993,062				5,993,062