Condensed Consolidated Statement of Shareholders' Equity - 3 months ended Mar. 27, 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	14,464				14,464
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	1,052					1,052
Change in employee benefit plans, net of taxes	51		51
Net foreign currency translation adjustment	$ (1,845)			(1,845)
Stock Options Exercised, Shares	14,125	10,875
Stock Options Exercised, Value	$ 179	$ 179
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		2,552
Stock Based Compensation Expense	$ 556	$ 556
Stock Repurchased and Retired During Period, Shares	(585,970)	(672,483)
Stock Repurchased and Retired During Period, Value	$ (11,928)	$ (2,238)			(9,690)
Dividends, Cash	(4,632)				(4,632)
Balance at Mar. 27, 2016	$ 411,809	$ 86,605	$ (4,089)	$ (90,129)	$ 427,659	$ (8,237)
Share balance at Mar. 27, 2016	26,727,997	25,439,839