Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Net income (loss)	$ 13,165	$ 6,534	$ 27,628	$ 10,868
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	(6,821)	(2,311)	(8,666)	(6,036)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(6,734)	(928)	(5,416)	(3,020)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	1,216	(266)	2,210
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(6,734)	288	(5,682)	(810)
Defined benefit pension plan:
Amortization of amounts resulting from changes in actuarial assumptions	84	134	168	268
Tax provision	(30)	(50)	(62)	(100)
Pension changes, net of tax	54	84	106	168
Other comprehensive income (loss), net of tax	(13,501)	(1,939)	(14,242)	(6,678)
Comprehensive income	$ (336)	$ 4,595	$ 13,386	$ 4,190