Change in Fair Values for Level Three Assets (Detail) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jul. 30, 2016 |
Aug. 01, 2015 |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Beginning balance | $ 11,296 | $ 10,226 |
| Sales and redemptions | (2,322) | |
| Unrealized losses included in accumulated other comprehensive income | (103) | |
| Ending balance | $ 8,974 | $ 10,123 |