Investment Securities - Amortized Cost and Estimated Fair Values of Investment Securities that are Available-for-Sale and Held-to-Maturity by Contractual Maturity (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Available-for-sale Securities by Maturity, Amortized Cost |
|
|
| Available-for-sale, Securities maturing in one year or less, Amortized cost |
$ 22,211
|
|
| Available-for-sale, Securities maturing in After one year through five years, Amortized cost |
110,702
|
|
| Available-for-sale, Securities maturing in After five years through ten years, Amortized cost |
93,472
|
|
| Available-for-sale, Securities maturing in After ten years, Amortized cost |
110,860
|
|
| Available-for-sale, Amortized Cost |
337,245
|
$ 333,268
|
| Available-for-sale Securities by Maturity, Fair Value |
|
|
| Available-for-sale, Securities maturing in one year or less, Fair Value |
22,288
|
|
| Available-for-sale, Securities maturing in After one year through five years, Fair Value |
110,290
|
|
| Available-for-sale, Securities maturing in After five years through ten years, Fair Value |
92,908
|
|
| Available-for-sale, Securities maturing in After ten years, Fair Value |
110,123
|
|
| Available-for-sale, Fair Value |
335,609
|
332,736
|
| Held-to-maturity Securities by Maturity, Amortized Cost |
|
|
| Held-to-maturity, Securities maturing in one year or less, Amortized Cost |
10,099
|
|
| Held-to-maturity, Securities maturing in After one year through five years, Amortized Cost |
46,310
|
|
| Held-to-maturity, Securities maturing in After five years through ten years, Amortized Cost |
12,403
|
|
| Held-to-maturity, Securities maturing in After ten years, Amortized Cost |
4,700
|
|
| Held-to-maturity, Amortized Cost |
73,512
|
65,882
|
| Held-to-maturity Securities by Maturity, Fair Value |
|
|
| Held-to-maturity, Securities maturing in one year or less, Fair Value |
10,107
|
|
| Held-to-maturity, Securities maturing in After one year through five years, Fair Value |
46,102
|
|
| Held-to-maturity, Securities maturing in After five years through ten years, Fair Value |
12,218
|
|
| Held-to-maturity, Securities maturing in After ten years, Fair Value |
4,573
|
|
| Held-to-maturity, Fair Value |
$ 73,000
|
$ 66,049
|