Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($)
$ in Thousands |
Sep. 30, 2017 |
Dec. 31, 2016 |
| Schedule of Investments [Line Items] |
|
|
| Amortized Cost: Due after one year through five years |
$ 15,865
|
|
| Amortized Cost: Due after five years through ten years |
20,553
|
|
| Amortized Cost: Due after ten years |
34,212
|
|
| Amortized Cost: Sub Total |
70,630
|
|
| Fair Value: Due after one year through five years |
15,759
|
|
| Fair Value: Due after five years through ten years |
20,193
|
|
| Fair Value: Due after ten years |
29,499
|
|
| Available For Sale Debt Maturities Fair Value Sub Total |
65,451
|
|
| Available-for-sale Securities, Amortized Cost Basis |
155,419
|
$ 149,561
|
| Available-for-sale Securities |
149,160
|
140,000
|
| Amortized Cost: Due after five years through ten years, Held to maturity |
15,841
|
|
| Amortized Cost: Due after ten years, Held to maturity |
8,510
|
|
| Amortized Cost: Total, Held to maturity |
24,351
|
|
| Fair Value: Due after five years through ten years, Held to maturity |
16,450
|
|
| Fair Value: Due after ten years, Held to maturity |
9,836
|
|
| Fair Value: Total, Held to maturity |
26,286
|
|
| Held-to-maturity securities |
95,975
|
97,169
|
| Held-to-maturity securities, fair value |
98,183
|
97,981
|
| Residential mortgage-backed agencies [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Held-to-maturity securities |
50,019
|
50,384
|
| Held-to-maturity securities, fair value |
49,957
|
50,265
|
| Commercial mortgage-backed agencies [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale Securities, Amortized Cost Basis |
42,417
|
52,978
|
| Available-for-sale Securities |
41,823
|
52,222
|
| Held-to-maturity securities |
17,364
|
17,584
|
| Held-to-maturity securities, fair value |
17,749
|
17,832
|
| Collateralized mortgage obligations [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale Securities, Amortized Cost Basis |
42,372
|
19,953
|
| Available-for-sale Securities |
41,886
|
19,567
|
| Held-to-maturity securities |
4,241
|
4,833
|
| Held-to-maturity securities, fair value |
$ 4,191
|
$ 4,684
|