Commitments and Financial Instruments with Off-Balance-Sheet Risk (Details) - USD ($)
$ in Thousands |
3 Months Ended |
|
Mar. 31, 2016 |
Dec. 31, 2015 |
| Loan commitments to extend credit |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Off-balance-sheet instruments |
$ 853,202
|
$ 829,509
|
| Standby letters of credit |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Off-balance-sheet instruments |
$ 39,563
|
37,984
|
| Standby letters of credit | Minimum |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Letter of credit term |
6 months
|
|
| Standby letters of credit | Maximum |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Letter of credit term |
1 year
|
|
| Commercial and similar letters of credit |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Off-balance-sheet instruments |
$ 611
|
$ 741
|
| Commercial and similar letters of credit | Minimum |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Letter of credit term |
3 months
|
|
| Commercial and similar letters of credit | Maximum |
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
| Letter of credit term |
6 months
|
|