Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 28, 2013	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012	Mar. 01, 2014
SERP Investment		$ 9,121,000	$ 8,752,000	$ 6,900,000
Cash Equivalents, at Carrying Value		14,400,000	7,200,000
Allowance for Doubtful Accounts Receivable		1,578,000	1,882,000
Impairment of Long-Lived Assets Held-for-use	2,100,000	0	2,088,000	0
Self Insurance, Maximum of Workers Compensation Claims Liability per Associate per Claim		2,000,000
Stop loss insurance specific deductible					500,000
Stop loss insurance aggregating deductible					250,000
Cost of Goods Sold, Vendor Allowances		89,500,000	76,400,000	75,100,000
Vendor Paid Cooperative Advertising Credits		16,000,000	16,000,000	16,400,000
Accounts Receivable, Earned Advertising Credits		395,000	440,000
Accounts Receivable, Earned Promotional Discounts		5,700,000	5,800,000
Unearned Income for Vendor Programs		734,000	911,000
Advertising Expense		24,600,000	23,500,000	23,500,000
ASU 2014-15, Presentation of Financial Statements - Going Concern [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0
Depreciation Expense [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			(11,500,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income			(6,800,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Basic Earnings Per Share			$ (0.25)
Prior to March 1, 2012 [Member]
Self Insurance, Annual Maximum of Health Claims Liability per Associate		750,000
Between March 1, 2012 to March 1, 2013 [Member]
Self Insurance, Annual Maximum of Health Claims Liability per Associate		1,250,000
Between March 1, 2013 to March 1, 2014 [Member]
Self Insurance, Annual Maximum of Health Claims Liability per Associate		2,000,000
Maximum [Member]
Property and Casualty Insurance, Deductible		1,000,000
Minimum [Member]
Property and Casualty Insurance, Deductible		$ 100,000