Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Items [Member]	Noncontrolling Interest [Member]	Total
Beginning balance at Dec. 31, 2011	$ 146	$ 93,701	$ 198,706	$ (62,118)	$ (7,955)	$ 1,150	$ 223,630
Beginning balance (in shares) at Dec. 31, 2011	14,624,159			2,983,717
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	0	0	7,053	0	0	23	7,076
Activity under stock plans	0	(1,645)	0	1,939	0	0	294
Treasury stock reissued (in shares)				(93,074)
Tax benefits related to employees' and directors' stock plans	0	122	0	0	0	0	122
Purchases of Company common stock	0	0	0	(1,281)	0	0	(1,281)
Purchases of Company common stock (in shares)				58,099
Other Comprehensive Items	0	0	0	0	4,037	34	4,071
Ending balance at Mar. 31, 2012	146	92,178	205,759	(61,460)	(3,918)	1,207	233,912
Ending balance (in shares) at Mar. 31, 2012	14,624,159			2,948,742
Beginning balance at Dec. 29, 2012	146	95,448	230,329	(74,025)	(3,315)	1,384	249,967
Beginning balance (in shares) at Dec. 29, 2012	14,624,159			3,493,546
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	0	0	5,284	0	0	36	5,320
Dividend declared	0	0	(1,401)	0	0	0	(1,401)
Activity under stock plans	0	(2,535)	0	2,651	0	0	116
Treasury stock reissued (in shares)				(125,054)
Tax benefits related to employees' and directors' stock plans	0	303	0	0	0	0	303
Purchases of Company common stock	0	0	0	(1,334)	0	0	(1,334)
Purchases of Company common stock (in shares)				50,000
Other Comprehensive Items	0	0	0	0	(2,728)	(48)	(2,776)
Ending balance at Mar. 30, 2013	$ 146	$ 93,216	$ 234,212	$ (72,708)	$ (6,043)	$ 1,372	$ 250,195
Ending balance (in shares) at Mar. 30, 2013	14,624,159			3,418,492