Acquisitions (Details) (USD $)	3 Months Ended	6 Months Ended		6 Months Ended
	Sep. 27, 2014	Sep. 27, 2014	Sep. 28, 2013	Sep. 28, 2013 Curry Acquisition numberofstores	Sep. 27, 2014 Hennelly Acquistion [Member] numberofstores	Sep. 27, 2014 Lentz Acquisition [Member] numberofstores	Sep. 27, 2014 Kan Rock Acquisition [Member] numberofstores	Sep. 27, 2014 Bald Tire Acquisition [Member] numberofstores	Sep. 27, 2014 Wood & Fullerton Acquisition [Member] numberofstores	Sep. 28, 2013 Mitchell Acquisition [Member] numberofstores
Business Acquisition [Line Items]
Number of stores acquired				10	35	10	9	2	9	1
Total costs related to acquisitions	$ 200,000	$ 600,000
Sales for the fiscal 2015 acquired entities	9,700,000	10,600,000
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]
Inventories	4,384,000	4,384,000
Other current assets	437,000	437,000
Property, plant and equipment	24,588,000	24,588,000
Intangible assets	7,755,000	7,755,000
Long-term deferred income tax assets	15,167,000	15,167,000
Other non-current assets	17,000	17,000
Total assets acquired	52,348,000	52,348,000	6,511,000
Warranty reserves	702,000	702,000
Other current liabilities	2,468,000	2,468,000
Long-term capital leases and financing obligations	48,064,000	48,064,000
Other long-term liabilities	1,122,000	1,122,000
Total liabilities assumed	52,356,000	52,356,000	3,856,000
Total net identifiable assets acquied	(8,000)	(8,000)
Total consideration transferred	64,192,000	64,192,000
Less: total net identifiable assets acquired	(8,000)	(8,000)
Goodwill	$ 64,200,000	$ 64,200,000	$ 14,577,000