Investment Securities - Summary of Carrying Amounts and Estimated Fair Values of Securities Held-to-Maturity (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Schedule Of Held To Maturity Securities [Line Items] |
|
|
| Held-to-maturity, Amortized Cost |
$ 73,512
|
$ 65,882
|
| Held-to-maturity, Gross Unrealized Gain |
105
|
243
|
| Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months |
(579)
|
(74)
|
| Held-to-maturity, Gross Unrealized Losses, 12 Months or Longer |
(38)
|
(2)
|
| Held-to-maturity, Fair Value |
73,000
|
66,049
|
| Municipal Securities |
|
|
| Schedule Of Held To Maturity Securities [Line Items] |
|
|
| Held-to-maturity, Amortized Cost |
73,512
|
63,650
|
| Held-to-maturity, Gross Unrealized Gain |
105
|
238
|
| Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months |
(579)
|
(74)
|
| Held-to-maturity, Gross Unrealized Losses, 12 Months or Longer |
(38)
|
(2)
|
| Held-to-maturity, Fair Value |
$ 73,000
|
63,812
|
| Certificates of Deposit |
|
|
| Schedule Of Held To Maturity Securities [Line Items] |
|
|
| Held-to-maturity, Amortized Cost |
|
2,232
|
| Held-to-maturity, Gross Unrealized Gain |
|
5
|
| Held-to-maturity, Fair Value |
|
$ 2,237
|