|
Outstanding Principal Balance and Carrying Amount of Loans Included in Consolidated Balance Sheet (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Business Acquisition [Line Items] | ||
| Outstanding principal balance | $ 26,467 | $ 385,152 |
| Carrying amount | 26,099 | |
|
Business acquisition
|
||
| Business Acquisition [Line Items] | ||
| Outstanding principal balance | 26,467 | |
| Carrying amount | $ 26,099 |