Investments (Gross Unrealized Losses and Fair Values of Securities) (Details) - USD ($)
$ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
$ 44,687
|
$ 47,594
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
1,487
|
754
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
89,822
|
82,737
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
5,386
|
6,695
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
63,559
|
27,302
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
1,069
|
149
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
18,416
|
14,540
|
| Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss |
973
|
357
|
| US government agencies [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
4,838
|
4,931
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
162
|
69
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
23,913
|
24,325
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
1,087
|
675
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
15,934
|
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
12
|
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
0
|
|
| Residential mortgage-backed agencies [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
29,047
|
15,897
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
696
|
135
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
14,645
|
10,422
|
| Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss |
755
|
288
|
| Commercial mortgage-backed agencies [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
12,311
|
12,593
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
473
|
169
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
26,532
|
28,298
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
1,134
|
711
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
16,416
|
9,028
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
227
|
6
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
0
|
0
|
| Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss |
0
|
0
|
| Collateralized mortgage obligations [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
16,826
|
27,387
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
619
|
472
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
20,799
|
12,447
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
859
|
443
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
0
|
0
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
0
|
0
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
3,771
|
4,118
|
| Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss |
218
|
69
|
| Obligations of states and political subdivisions [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
10,712
|
2,683
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
233
|
44
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
2,431
|
2,747
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
96
|
75
|
| Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value |
2,162
|
2,377
|
| Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss |
134
|
8
|
| Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value |
0
|
0
|
| Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss |
0
|
0
|
| Collateralized debt obligations [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value |
0
|
0
|
| Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses |
0
|
0
|
| Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value |
16,147
|
14,920
|
| Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses |
$ 2,210
|
$ 4,791
|