Condensed Consolidated Statement of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock Including Additional Paid in Capital [Member]	Pension Plans, Defined Benefit [Member]	Accumulated Translation Adjustment [Member]	Retained Earnings [Member]
Balance at Dec. 30, 2012	$ 466,905	$ 71,819	$ (5,030)	$ (57,584)	$ 457,700
Share balance at Dec. 30, 2012	27,295,488	27,295,488
Net income	11,258				11,258
Change in employee benefit plans, net of taxes	169		169
Net foreign currency translation adjustment	(1,693)			(1,693)
Stock Options Exercised, Shares	92,808	92,808
Stock Options Exercised, Value	1,133	1,133
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		41,682
Stock Based Compensation Expense	986	986
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	249	249
Balance at Jun. 30, 2013	$ 479,007	$ 74,187	$ (4,861)	$ (59,277)	$ 468,958
Share balance at Jun. 30, 2013	27,429,978	27,429,978