Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Net income (loss)	$ 14,464	$ 4,334
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	(1,845)	(3,725)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	1,318	(2,092)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	(266)	994
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	1,052	(1,098)
Defined benefit pension plan:
Amortization of amounts resulting from changes in actuarial assumptions	84	134
Tax provision	(33)	(50)
Pension changes, net of tax	51	84
Other comprehensive income (loss), net of tax	(742)	(4,739)
Comprehensive income	$ 13,722	$ (405)