Derivative - Changes in AOCL, net of tax (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2021	Sep. 29, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 288,693	$ 571,742
Ending balance	321,946	322,276
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,785)	(435)
Ending balance	(166)	(4,841)
Interest rate swap agreement | Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,464)	0
Other comprehensive loss before reclassifications	2,514	(4,726)
Amounts reclassified from AOCI	950	667
Other comprehensive loss, net of tax	$ 3,464	(4,059)
Ending balance		$ (4,059)