Condensed Consolidated Statement of Shareholders' Equity - 6 months ended Jun. 28, 2015 - USD ($) $ in Thousands	Total	Common Stock Including Additional Paid in Capital [Member]	Pension Plans, Defined Benefit [Member]	Accumulated Translation Adjustment [Member]	Retained Earnings [Member]	Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Share balance at Dec. 28, 2014	26,730,247	26,730,247
Balance at Dec. 28, 2014	$ 439,006	$ 81,473	$ (5,186)	$ (71,474)	$ 438,958
Net income	10,868				10,868
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(810)
Change in employee benefit plans, net of taxes	168		168
Net foreign currency translation adjustment	$ (6,036)			(6,036)
Stock Options Exercised, Shares	375,178	375,178
Stock Options Exercised, Value	$ 6,484	$ 6,484
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		17,285
Stock Based Compensation Expense	1,270	$ 1,270
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ (1,389)	$ (1,389)
Stock Repurchased and Retired During Period, Shares	(394,713)	(394,713)
Stock Repurchased and Retired During Period, Value	$ (7,547)	$ (1,259)			(6,288)
Dividends, Cash	(9,698)				(9,698)
Balance at Jun. 28, 2015	$ 432,316	$ 86,579	$ (5,018)	$ (77,510)	$ 433,840	$ (5,575)
Share balance at Jun. 28, 2015	26,727,997	26,727,997