Income Taxes (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Income Taxes [Abstract]
Domestic	$ 121,614	$ 135,445	$ 262,220
Foreign	10,175	12,568	9,178
Income before income taxes	131,789	148,013	271,398
Current tax expense [Abstract]
Federal	50,272	45,723	69,565
Foreign	4,042	2,346	2,608
State and local	4,886	3,905	6,723
Current tax expense	59,200	51,974	78,896
Deferred tax (benefit) expense [Abstract]
Federal	(13,739)	(2,469)	17,694
Foreign	(1,180)	890	(376)
State and local	(899)	(4,916)	1,895
Deferred tax (benefit) expense	(15,818)	(6,495)	19,213
Income tax expense	43,382	45,479	98,109
Undistributed earnings of foreign subsidiaries	81,000
Income Tax Reconciliation [Abstract]
Expected income tax expense	46,126	51,805	94,989
State and local income tax, net of federal benefit	2,673	3,355	6,405
Effect of foreign statutory rate different from U.S. and other foreign adjustments	(654)	(1,094)	(1,026)
Valuation allowance changes	0	(5,732)	0
U.S. production activities deduction	(3,500)	(4,025)	(4,445)
Goodwill disposition	646	0	1,790
Tax contingency changes	0	0	(140)
Permanent adjustment to deferred tax liabilities	(4,218)	0	0
Other, net	2,309	1,170	536
Income tax expense	43,382	45,479	98,109
Unrecognized tax benefits that would impact effective tax rate	0	0	0
Deferred tax assets [Abstract]
Inventories	14,802	12,815
Other postretirement benefits and accrued items	15,294	14,550
Pension	2,349	4,792
Other reserves	9,823	10,262
Federal and foreign tax attributes	7,403	6,451
State tax attributes, net of federal benefit	21,716	22,928
Share-based compensation	3,397	3,016
Total deferred tax assets	74,784	74,814
Less valuation allowance	(17,650)	(17,119)
Deferred tax assets, net of valuation allowance	57,134	57,695
Deferred tax liabilities [Abstract]
Property, plant, and equipment	43,592	57,089
Other	1,546	1,721
Total deferred tax liabilities	45,138	58,810
Net deferred tax asset (liability)	11,996	$ (1,115)
State income tax credit carryforwards with expiration	3,300
Other state income tax credit carryforwards with unlimited life	10,100
State net operating loss carryforwards with potential tax benefits	8,400
Valuation allowances	11,600
Federal and foreign tax attributes with potential tax benefits	7,300
Valuation allowances	$ 3,700
Permanent adjustment to deferred tax liabilities (in dollars per share)	$ 0.07
Additional valuation allowance per diluted share, State tax attributes (in dollars per share)		$ 0.10
Income taxes paid	$ 49,900	$ 47,300	$ 80,100