Correction of Prior Consolidated Financial Statements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 25, 2014	Jul. 26, 2013	Apr. 25, 2014
Balance Sheet [Abstract]
Credit facility borrowings	$ 0		$ 458,898
Total current liabilities	133,194		599,085
Long-term debt	462,240		835
Total long-term liabilities	547,184		80,888
Statement of Cash Flows [Abstract]
Net decrease in credit facility	0
Proceeds from long term debt	0
Proceeds from credit facility borrowings and other long-term debt	97,159	117,579
Repayments of credit facility borrowings and other long-term debt	(94,288)	(104,335)
As reported
Balance Sheet [Abstract]
Credit facility borrowings	458,836
Total current liabilities	592,030
Long-term debt	3,404
Total long-term liabilities	88,348
Statement of Cash Flows [Abstract]
Net decrease in credit facility	(62)
Proceeds from long term debt	2,933
Proceeds from credit facility borrowings and other long-term debt	0
Repayments of credit facility borrowings and other long-term debt	0
Adjustments
Balance Sheet [Abstract]
Credit facility borrowings	(458,836)
Total current liabilities	(458,836)
Long-term debt	458,836
Total long-term liabilities	458,836
Statement of Cash Flows [Abstract]
Net decrease in credit facility	62
Proceeds from long term debt	(2,933)
Proceeds from credit facility borrowings and other long-term debt	97,159
Repayments of credit facility borrowings and other long-term debt	$ (94,288)