Income Taxes - (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 28, 2022	Dec. 29, 2021
Deferred tax assets:
Self-insurance accruals	$ 2,094	$ 2,594
Finance lease liabilities	1,230	1,281
Operating lease liabilities	33,028	35,545
Accrued exit costs	21	19
Interest rate swaps	0	13,221
Pension, other retirement and compensation plans	11,239	11,259
Deferred income	4,396	4,675
Other accruals	918	0
General business and foreign tax credit carryforwards - state and federal	2,387	2,218
Net operating loss carryforwards - state	1,157	1,429
Total deferred tax assets before valuation allowance	56,470	72,241
Less: valuation allowance	(2,738)	(2,192)
Total deferred tax assets	53,732	70,049
Deferred tax liabilities:
Intangible assets	(15,706)	(14,874)
Contract assets	(1,360)	0
Deferred finance costs	(250)	(313)
Operating lease right-of-use assets	(29,822)	(32,198)
Fixed assets	(9,291)	(10,134)
Interest rate swaps	(4,722)	0
Other accruals	0	(1,028)
Total deferred tax liabilities	(61,151)	(58,547)
Net deferred tax asset (liability)	$ (7,419)
Net deferred tax asset (liability)		$ 11,502