Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2019	Dec. 30, 2018
Deferred tax assets:
Accounts receivable	$ 26,973	$ 29,094
Inventories	10,020	11,958
Loss and credit carryforwards	35,509	105,915
Operating leases	15,378
Operating expenses	23,686	21,213
Pension	6,206	11,543
Other compensation	27,633	35,418
Postretirement benefits	7,053	7,894
Interest rate hedge	5,202	5,607
Tax sharing agreement	3,096	4,015
Other	15,122	9,077
Gross deferred tax assets	175,878	241,734
Valuation allowance	(33,260)	(36,311)
Net deferred tax assets	142,618	205,423
Deferred tax liabilities:
Depreciation and amortization of long-lived assets	13,361	12,258
Equity method investment	17,674	15,113
Operating leases	11,936
Other	9,852	9,885
Deferred tax liabilities	52,823	37,256
Net deferred income taxes	$ 89,795	$ 168,167