|
Deposits - Additional Information (Detail) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
Customer
|
Dec. 31, 2013
Customer
|
Dec. 31, 2012
|
|
| Schedule Of Deposits [Line Items] | |||
| Time deposits greater than or equal to $100,000 | $ 85,302,000 | $ 86,491,000 | |
| Aggregate deposits | 206,207,000 | 138,063,000 | |
| Brokered certificates of deposits | 48,935,000 | 0 | |
| Average weighted rate | 0.81% | ||
| Customer [Member] | |||
| Schedule Of Deposits [Line Items] | |||
| Number of customers | 1 | 2 | |
| Aggregate deposits | $ 66,411,000,000 | $ 72,250,000,000 | |
| Percentage of bank deposits | 7.00% | 11.00% | |