Accumulated Other Comprehensive Items - Components of AOCI on the Balance Sheet (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 284,279	$ 267,945	$ 265,459
Ending balance	332,504	284,279	267,945
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(41,094)
Other comprehensive income (loss) before reclassifications	23,593
Reclassifications from AOCI	0
Net current period other comprehensive income (loss)	23,593
Ending balance	(17,501)	(41,094)
Unrecognized Prior Service Cost
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(397)
Other comprehensive income (loss) before reclassifications	(17)
Reclassifications from AOCI	95
Net current period other comprehensive income (loss)	78
Ending balance	(319)	(397)
Deferred Loss on Pension and Other Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(8,158)
Other comprehensive income (loss) before reclassifications	(1,185)
Reclassifications from AOCI	369
Net current period other comprehensive income (loss)	(816)
Ending balance	(8,974)	(8,158)
Deferred Gain (Loss) on Hedging Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	12
Other comprehensive income (loss) before reclassifications	(17)
Reclassifications from AOCI	84
Net current period other comprehensive income (loss)	67
Ending balance	79	12
Accumulated Other Comprehensive Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(49,637)	(36,972)	(17,146)
Other comprehensive income (loss) before reclassifications	22,374
Reclassifications from AOCI	548
Net current period other comprehensive income (loss)	22,922
Ending balance	$ (26,715)	$ (49,637)	$ (36,972)