Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Income Taxes [Abstract]
Domestic	$ 118,208,000	$ 88,262,000	$ 36,478,000
Foreign	11,953,000	33,588,000	(13,349,000)
Income before income taxes	130,161,000	121,850,000	23,129,000
Current tax expense (benefit) [Abstract]
Federal	43,127,000	32,132,000	14,834,000
Foreign	1,740,000	6,292,000	3,248,000
State and local	2,398,000	2,518,000	2,264,000
Current tax expense	47,265,000	40,942,000	20,346,000
Deferred tax (benefit) expense [Abstract]
Federal	(6,480,000)	(4,057,000)	(4,321,000)
Foreign	344,000	(2,036,000)	3,893,000
State and local	1,946,000	(534,000)	(2,126,000)
Deferred tax (benefit) expense	(4,190,000)	(6,627,000)	(2,554,000)
Income tax expense	43,075,000	34,315,000	17,792,000
Income Tax Reconciliation [Abstract]
Expected income tax expense	45,556,000	42,647,000	8,095,000
State and local income tax, net of federal benefit	4,267,000	2,867,000	2,844,000
Effect of foreign statutory rate different from U.S. and other foreign adjustments	(560,000)	(2,143,000)	435,000
Valuation allowance changes	(443,000)	(5,496,000)	52,000
U.S. production activities deduction	(3,850,000)	(2,975,000)	(700,000)
Gain on early retirement of debt	0	0	(45,000)
Goodwill impairment	0	0	8,728,000
Tax contingency changes	(1,934,000)	(1,516,000)	(973,000)
Other, net	39,000	931,000	(644,000)
Income tax expense	43,075,000	34,315,000	17,792,000
Additional valuation allowance releases, State tax attributes	400,000
Additional valuation allowance per diluted share, State tax attributes (in dollars per share)	$ 0.01
Deferred tax asset valuation allowance released		5,500,000
Valuation allowance per diluted share (in dollars per share)		$ 0.15	$ 0.02
Additional valuation allowance releases		1,100,000	2,600,000
Additional valuation allowance releases per diluted share (in dollars per share)		$ 0.03	$ 0.07
Valuation allowance added to offset foreign deferred tax asset		(1,100,000)	(3,600,000)
Valuation allowance to offset foreign deferred tax asset per diluted share (in dollars per share)		$ (0.03)	$ (0.10)
Valuation allowance related to federal deferred tax asset			900,000
Deferred tax asset associated with tax uncertainties	200,000
Unrecognized Tax Benefits Reconciliation [Roll Forward]
Beginning balance	8,565,000	11,282,000
Increases related to prior year tax positions	0	134,000
Increases related to current year tax positions	0	47,000
Decreases related to prior year tax positions	(802,000)	(612,000)
Decreases related to settlements with taxing authorities	0	(392,000)
Decreases due to lapses in the statute of limitations	(1,191,000)	(1,894,000)
Ending balance	6,572,000	8,565,000	11,282,000
Unrecognized tax benefits, accrued interest	200,000
Unrecognized tax benefits that would impact effective tax rate	4,000,000
Unrecognized tax benefits decreases resulting from current period tax positions	3,600,000
Cumulative potential interest and penalties accrued related to unrecognized tax benefits	200,000	700,000
Credit to income tax expense related to penalties and interest	500,000	200,000	700,000
Audit settlements tax expense		2,000,000
Audit settlements tax expense per diluted share (in dollars per share)		$ 0.05
Deferred tax assets [Abstract]
Accounts receivable	424,000	1,961,000
Inventories	11,075,000	7,885,000
Other postretirement benefits and accrued items	13,880,000	13,889,000
Pension	19,262,000	14,764,000
Other reserves	14,671,000	13,516,000
Federal and foreign tax attributes	7,421,000	6,651,000
State tax attributes, net of federal benefit	30,478,000	32,138,000
Other	2,296,000	2,062,000
Total deferred tax assets	99,507,000	92,866,000
Less valuation allowance	(29,705,000)	(28,714,000)
Deferred tax assets, net of valuation allowance	69,802,000	64,152,000
Deferred tax liabilities [Abstract]
Property, plant, and equipment	44,757,000	48,330,000
Foreign withholding tax	0	719,000
Pension	8,589,000	8,621,000
Other	893,000	1,093,000
Total deferred tax liabilities	54,239,000	58,763,000
Net deferred tax asset (liability)	15,563,000	5,389,000
State income tax credit carryforwards	600,000
Other state income tax credit carryforwards	15,400,000
State net operating loss carryforwards with potential tax benefits	14,400,000
State tax credit and NOL carryforwards offset by valuation allowances	22,800,000
Federal and foreign tax attributes with potential tax benefits	7,400,000
Federal and foreign tax attributes with potential tax benefits with unlimited life	2,200,000
Federal and foreign tax attributes with potential tax benefits with expiration	5,200,000
Valuation allowances	6,900,000
Income taxes paid	$ 45,900,000	$ 46,000,000	$ 20,000,000