Condensed Consolidated Statement of Shareholders' Equity - 6 months ended Jun. 26, 2016 - 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. 27, 2015	26,730,247	26,098,895
Balance at Dec. 27, 2015	$ 413,912	$ 88,108	$ (4,140)	$ (88,284)	$ 427,517	$ (9,289)
Net income	27,628
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(5,682)
Change in employee benefit plans, net of taxes	106		106
Net foreign currency translation adjustment	$ (8,666)			(8,666)
Stock Options Exercised, Shares	50,158	48,908
Stock Options Exercised, Value	$ 898	$ 898
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		1,557
Stock Based Compensation Expense	2,314	$ 2,314
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	0	$ 0
Stock Repurchased and Retired During Period, Shares		(723,669)
Stock Repurchased and Retired During Period, Value	(13,098)	$ (2,414)			(10,684)
Dividends, Cash	(9,254)				(9,254)
Balance at Jun. 26, 2016	$ 408,158	$ 88,906	$ (4,034)	$ (96,950)	$ 435,207	$ (14,971)
Share balance at Jun. 26, 2016	26,727,997	25,425,691