|
Contractual Maturities of Available for Sale Debt Securities (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2012
|
|---|---|
| Schedule of Available-for-sale Securities [Line Items] | |
| Due within one year | $ 57,647 |
| Due one to five years | 143,966 |
| Available-for-sale Securities, Fair Value Disclosure | $ 201,613 |