Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Net income (loss)	$ 5,974	$ 4,946	$ 33,602	$ 15,814
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(4,211)	(9,098)	(12,877)	(15,134)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(2,545)	(6,826)	(7,961)	(9,844)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	1,935	(266)	4,144
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(2,545)	(4,891)	(8,227)	(5,700)
Defined benefit pension plan:
Amortization of amounts resulting from changes in actuarial assumptions	84	134	252	402
Tax provision	(31)	(51)	(93)	(151)
Pension changes, net of tax	53	83	159	251
Other comprehensive income (loss), net of tax	(6,703)	(13,906)	(20,945)	(20,583)
Comprehensive income	$ (729)	$ (8,960)	$ 12,657	$ (4,769)