Condensed Consolidated Statement of Shareholders' Equity - 9 months ended Sep. 27, 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	15,814				15,814
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(5,700)
Change in employee benefit plans, net of taxes	251		251
Net foreign currency translation adjustment	$ (15,134)			(15,134)
Stock Options Exercised, Shares	420,142	420,142
Stock Options Exercised, Value	$ 7,265	$ 7,265
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		6,455
Stock Based Compensation Expense	2,059	$ 2,059
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ (1,464)	$ (1,464)
Stock Repurchased and Retired During Period, Shares	(769,931)	(769,931)
Stock Repurchased and Retired During Period, Value	$ (14,374)	$ (2,485)			(11,889)
Dividends, Cash	(14,467)				(14,467)
Balance at Sep. 27, 2015	$ 413,256	$ 86,848	$ (4,935)	$ (86,608)	$ 428,416	$ (10,465)
Share balance at Sep. 27, 2015	26,727,997	26,386,913