Operating Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 15, 2012	Sep. 10, 2011	Sep. 15, 2012	Sep. 10, 2011	Mar. 31, 2012
Schedule of segment reporting information by operating segment
Net sales	$ 621,559	$ 619,647	$ 1,225,471	$ 1,222,211
Inter-segment sales	155,658	153,618	305,282	304,055
Depreciation and amortization	8,805	8,408	17,475	16,775
Operating earnings	18,948	19,981	30,661	33,977
Capital expenditures	14,462	11,215	21,006	20,883
Total assets	784,013		784,013		763,473
Distribution [Member]
Schedule of segment reporting information by operating segment
Net sales	259,242	256,226	517,590	513,355
Inter-segment sales	155,658	153,618	305,282	304,055
Depreciation and amortization	1,972	1,976	3,931	3,889
Operating earnings	10,849	8,764	18,671	16,166
Capital expenditures	2,052	1,056	3,482	2,962
Total assets	271,076		271,076		216,873
Retail [Member]
Schedule of segment reporting information by operating segment
Net sales	362,317	363,421	707,881	708,856
Inter-segment sales
Depreciation and amortization	6,833	6,432	13,544	12,886
Operating earnings	8,099	11,217	11,990	17,811
Capital expenditures	12,410	10,159	17,524	17,921
Total assets	507,581		507,581		541,110
Discontinued Operations [Member]
Schedule of segment reporting information by operating segment
Total assets	$ 5,356		$ 5,356		$ 5,490