Lease Commitments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
---|---|---|---|
Apr. 28, 2012
|
Apr. 30, 2011
|
Apr. 24, 2010
|
|
Commitments and Contingencies Disclosure [Line Items] | |||
Rent expense | $ 20,819 | $ 20,459 | $ 19,238 |