Information on Impaired PCI Loan Pools (Detail) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
|
Sep. 30, 2016
USD ($)
Loan
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
Loan
|
Sep. 30, 2015
USD ($)
|
Dec. 31, 2015
USD ($)
Loan
|
|
| Financing Receivable, Recorded Investment [Line Items] | |||||
| Unpaid principal balance | $ 7,652 | $ 7,652 | $ 11,277 | ||
| Recorded investment | 7,436 | 7,436 | 11,184 | ||
| Interest income recognized | 169 | $ 128 | 555 | $ 523 | |
| Average recorded investment | 7,665 | 11,023 | 7,773 | 12,100 | |
| PCI loans | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| Unpaid principal balance | 1,104 | 1,104 | 3,759 | ||
| Recorded investment | $ 1,104 | 1,104 | 2,834 | ||
| Allowance for loan losses | $ 12 | $ 54 | |||
| Number of impaired loans | Loan | 1 | 1 | 2 | ||
| Interest income recognized | $ 12 | 96 | $ 130 | 273 | |
| Average recorded investment | $ 1,139 | $ 3,045 | $ 2,195 | $ 3,464 | |