Derivative Instruments and Hedging Activities, Offsetting of Derivative Assets Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 30, 2015	Jul. 31, 2015
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months	$ 3,955
Interest Rate Swaps [Member]
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract]
Gross Asset Amounts	1,241	$ 3,878
Liability Amount Offset	(203)	(119)
Net Asset Amount Presented in the Balance Sheets	1,038	3,759
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Gross Liability Amounts	11,982	9,821
Asset Amount Offset	0	0
Net Liability Amount Presented in the Balance Sheets	11,982	9,821
Other Assets [Member] | Interest Rate Swaps [Member]
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract]
Net Asset Amount Presented in the Balance Sheets	1,038	3,759
Current Interest Rate Swap Liability [Member]
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Reduction in the fair value	475	62
Current Interest Rate Swap Liability [Member] | Interest Rate Swaps [Member]
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Net Liability Amount Presented in the Balance Sheets	776	1,117
Long-term Interest Rate Swap Liability [Member] | Interest Rate Swaps [Member]
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Net Liability Amount Presented in the Balance Sheets	$ 11,206	$ 8,704