Derivatives - AOCI Activity (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 374,571
Loss reclassified to earnings	6,727
Loss recognized in AOCI	(4,971)
Ending balance	427,079
Deferred Loss on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(197)
Loss reclassified to earnings	123
Loss recognized in AOCI	(570)
Ending balance	(644)
Deferred Loss on Cash Flow Hedges | Interest rate swap agreements
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(170)
Loss reclassified to earnings	6
Loss recognized in AOCI	(425)
Ending balance	(589)
Deferred Loss on Cash Flow Hedges | Forward Currency-Exchange Contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(27)
Loss reclassified to earnings	117
Loss recognized in AOCI	(145)
Ending balance	$ (55)