Derivative Financial Instruments - Effect of Interest Rate Contracts on Condensed Consolidated Statements of Income and Other Comprehensive Income (OCI) (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jan. 30, 2016 |
Jan. 24, 2015 |
Jan. 30, 2016 |
Jan. 24, 2015 |
|
| Interest Rate Swap [Member] | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Effect of interest rate contracts | $ 442 | $ (8,143) | $ 1,496 | $ (14,319) |