CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Capital in Excess of Par Value	Reinvested Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Comprehensive Income
Beginning Balance at Dec. 31, 2008		$ 11,353	$ 15,203	$ 142,617	$ (10,516)
Comprehensive Income:
Net Earnings	13,070			12,821		249	13,070
Foreign currency translation adjustments					1,440	641	2,081
Pension liability adjustment (net of tax of $2,618 in 2011, $601 in 2010, $633 in 2009)					(990)		(990)
Total Comprehensive Income							14,161
Issuance of subsidiary shares to noncontrolling interest						3,157
Cash dividends declared ($0.64 per share in 2011, $0.63 per share in 2010, $0.59 per share in 2009)				(6,682)
Stock options exercised		85	596
Issuance of restricted stock		12	(12)
Stock-based compensation expense			877
Income tax benefit from stock options exercised and vesting of restricted stock			124
Shares purchased and retired		(117)		(2,515)
Ending Balance at Dec. 31, 2009		11,333	16,788	146,241	(10,066)	4,047
Comprehensive Income:
Net Earnings	14,126			13,668		458	14,126
Foreign currency translation adjustments					122	193	315
Pension liability adjustment (net of tax of $2,618 in 2011, $601 in 2010, $633 in 2009)					940		940
Total Comprehensive Income							15,381
Cash dividends declared ($0.64 per share in 2011, $0.63 per share in 2010, $0.59 per share in 2009)				(7,144)
Stock options exercised		114	1,088
Issuance of restricted stock		13	(13)
Restricted stock forfeited		(2)	2
Stock-based compensation expense			1,128
Income tax benefit from stock options exercised and vesting of restricted stock			555
Shares purchased and retired		(102)		(2,219)
Ending Balance at Dec. 31, 2010	177,144	11,356	19,548	150,546	(9,004)	4,698
Comprehensive Income:
Net Earnings	16,441			15,251		1,190	16,441
Foreign currency translation adjustments					(320)	(489)	(809)
Pension liability adjustment (net of tax of $2,618 in 2011, $601 in 2010, $633 in 2009)					(4,095)		(4,095)
Total Comprehensive Income							11,537
Cash dividends declared ($0.64 per share in 2011, $0.63 per share in 2010, $0.59 per share in 2009)				(7,086)
Stock options exercised		123	973
Issuance of restricted stock		19	(19)
Stock-based compensation expense			1,224
Income tax benefit from stock options exercised and vesting of restricted stock			496
Shares purchased and retired		(576)		(12,445)
Ending Balance at Dec. 31, 2011	$ 171,390	$ 10,922	$ 22,222	$ 146,266	$ (13,419)	$ 5,399