Consolidated Statement Of Shareholders' Equity And Comprehensive Income (USD $) In Thousands, unless otherwise specified	Preferred Stock [Member]	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning Balance at Dec. 27, 2008		$ 26	$ 38,042	$ 70,090	$ (1,602)	$ 106,556
Beginning Balance, shares at Dec. 27, 2008		24,986
Shares issued, Restricted Stock
Shares issued, Restricted Stock, shares		60
Shares issued, Other Comp
Shares issued, Other Comp, shares		6
Shares issued, Stock Options			11			11
Shares issued, Stock Options, shares		5
Shares issued, ESPP			392			392
Shares issued, ESPP, shares		43
Shares issued, ESOP			2,796			2,796
Shares issued, ESOP, shares		299
Stock-based compensation			960			960
Tax benefit of stock-based compensation			9			9
Dividends issued				(7,572)		(7,572)
Comprehensive income (loss):
Net income				1,856		1,856
Unrealized gain (loss) on available for sale securities					116	116
Foreign currency translation adjustments					2,490	2,490
Comprehensive income (loss):						4,462
Ending Balance at Jan. 02, 2010		26	42,210	64,374	1,004	107,614
Ending Balance, shares at Jan. 02, 2010		25,399
Shares issued, Restricted Stock
Shares issued, Restricted Stock, shares		69
Shares issued, Other Comp
Shares issued, Other Comp, shares		8
Shares issued, Stock Options			44			44
Shares issued, Stock Options, shares		15
Shares issued, ESPP			423			423
Shares issued, ESPP, shares		32
Stock-based compensation			1,149			1,149
Tax benefit of stock-based compensation			175			175
Dividends issued				(14,642)		(14,642)
Comprehensive income (loss):
Net income				21,400		21,400
Unrealized gain (loss) on available for sale securities					(59)	(59)
Foreign currency translation adjustments					(1,080)	(1,080)
Comprehensive income (loss):						20,261
Ending Balance at Jan. 01, 2011		26	44,001	71,132	(135)	115,024
Ending Balance, shares at Jan. 01, 2011		25,523
Shares issued, Restricted Stock
Shares issued, Restricted Stock, shares		88
Shares issued, Other Comp
Shares issued, Other Comp, shares		14
Shares issued, Stock Options			61			61
Shares issued, Stock Options, shares		9
Shares issued, ESPP			574			574
Shares issued, ESPP, shares		29
Shares issued, ESOP						2,412
Shares issued, shared distribution			2,412			2,412
Shares issued, shared distribution, shares		93
Stock-based compensation			1,752			1,752
Tax benefit of stock-based compensation			144			144
Dividends issued				(10,383)		(10,383)
Comprehensive income (loss):
Net income				37,677		37,677
Unrealized gain (loss) on available for sale securities					(549)	(549)
Foreign currency translation adjustments					(1,436)	(1,436)
Comprehensive income (loss):						35,692
Ending Balance at Dec. 31, 2011		$ 26	$ 48,944	$ 98,426	$ (2,120)	$ 145,276
Ending Balance, shares at Dec. 31, 2011		25,756