Derivative Financial Instruments - Additional Information (Detail) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 25, 2015	Mar. 31, 2015	Jan. 31, 2014	Jan. 30, 2016	Jan. 24, 2015	Jan. 30, 2016	Jan. 24, 2015	Aug. 31, 2015	Apr. 26, 2014
Interest Rate Cap [Member]
Derivative [Line Items]
Notional amount of derivatives				$ 575,000,000		$ 575,000,000
Replacement Interest Rate Cap Agreement [Member]
Derivative [Line Items]
Notional amount of derivatives								$ 100,000,000	$ 100,000,000
Interest Rate Swap Agreement [Member]
Derivative [Line Items]
Notional amount of derivatives			$ 250,000,000
Percentage of senior notes			5.17%
Settlement of swap		$ 29,003,000
Interest Rate Swap Agreement [Member] | 5.17% Senior Notes [Member]
Derivative [Line Items]
Maturity date of long-term loan			Mar. 25, 2015
Senior notes amount due			$ 250,000,000
Interest Rate Swap Agreement [Member] | 5.17% Senior Notes [Member] | Long-term Debt [Member]
Derivative [Line Items]
Period of long-term loan			10 years
Interest Rate Swap Agreement [Member] | Senior Notes 3.48% [Member]
Derivative [Line Items]
Percentage of senior notes	3.48%
Maturity date of long-term loan	Mar. 24, 2025
Period of long-term loan						10 years
Aggregate principal amount	$ 250,000,000
Interest Rate Swap [Member]
Derivative [Line Items]
Increase (decrease) in interest expense				$ 709,000	$ (48,000)	$ 2,114,000	$ (145,000)