Derivative Financial Instruments - Additional Information (Detail) - USD ($)		1 Months Ended		3 Months Ended
	Mar. 25, 2015	Mar. 31, 2015	Jan. 31, 2014	Jul. 27, 2019	Jul. 28, 2018	Apr. 27, 2019
Derivative [Line Items]
Settlement of swap				$ 122,000
Gains or losses recognized in OCI on cash flow hedging derivative				0	$ 0
Ineffectiveness recorded during period				0	0
Increase (decrease) in interest expense				(2,900,000)
Interest Rate Cap
Derivative [Line Items]
Notional amount of derivatives				525,000,000
New Interest Rate Cap
Derivative [Line Items]
Notional amount of derivatives				100,000,000
Interest Rate Swap Agreement
Derivative [Line Items]
Settlement of swap		$ 29,003,000
Interest Rate Swap Agreement | 5.17% Senior Notes
Derivative [Line Items]
Notional amount of derivatives			$ 250,000,000
Percentage of senior notes			5.17%
Maturity date of long-term loan			Mar. 25, 2015
Interest Rate Swap Agreement | Senior Notes 3.48%
Derivative [Line Items]
Percentage of senior notes	3.48%
Maturity date of long-term loan	Mar. 24, 2025
Aggregate principal amount	$ 250,000,000
Interest Rate Swap
Derivative [Line Items]
Notional amount of derivatives				565,756,000		$ 553,719,000
Increase (decrease) in interest expense				(725,000)	$ (733,000)
Interest Rate Swap Two
Derivative [Line Items]
Notional amount of derivatives				$ 72,798,000