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Investment Securities (Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands | Sep. 30, 2019 USD ($) security | Dec. 31, 2018 USD ($) security
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Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 6 | 16
Available-for-sale securities, Less than 12 Months: Fair Value | $ 8,640 | $ 20,487
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 18 | $ 190
Available-for-sale securities, 12 Months or More: Number of Securities | security | 21 | 91
Available-for-sale securities, 12 Months or More: Fair Value | $ 23,217 | $ 84,999
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 232 | $ 3,935
Available-for-sale securities, Total: Number of Securities | security | 27 | 107
Available-for-sale securities, Total: Fair Value | $ 31,857 | $ 105,486
Available-for-sale securities, Total: Unrealized Losses | $ 250 | $ 4,125
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 10 | 38
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 18,686 | $ 31,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 30 | $ 210
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 16 | 115
Held-to-maturity securities, 12 Months or More: Fair Value | $ 16,397 | $ 80,743
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 109 | $ 2,095
Held-to-maturity securities, Total: Number of Securities | security | 26 | 153
Held-to-maturity securities, Total: Fair Value | $ 35,083 | $ 111,743
Held-to-maturity securities, Total: Unrealized Losses | $ 139 | $ 2,305
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 16 | 54
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value | $ 27,326 | $ 51,487
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 48 | $ 400
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security | 37 | 206
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value | $ 39,614 | $ 165,742
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 341 | $ 6,030
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security | 53 | 260
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value | $ 66,940 | $ 217,229
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses | $ 389 | $ 6,430
U.S. Treasury and U.S. government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 3 | 0
Available-for-sale securities, Less than 12 Months: Fair Value | $ 6,988 |
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 12 |
Available-for-sale securities, 12 Months or More: Number of Securities | security | 7 | 21
Available-for-sale securities, 12 Months or More: Fair Value | $ 11,940 | $ 38,386
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 99 | $ 1,708
Available-for-sale securities, Total: Number of Securities | security | 10 | 21
Available-for-sale securities, Total: Fair Value | $ 18,928 | $ 38,386
Available-for-sale securities, Total: Unrealized Losses | $ 111 | $ 1,708
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 3 | 1
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 7,447 | $ 1,985
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 15 | $ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 1 | 3
Held-to-maturity securities, 12 Months or More: Fair Value | $ 2,994 | $ 8,852
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 5 | $ 133
Held-to-maturity securities, Total: Number of Securities | security | 4 | 4
Held-to-maturity securities, Total: Fair Value | $ 10,441 | $ 10,837
Held-to-maturity securities, Total: Unrealized Losses | $ 20 | $ 143
Mortgage-backed U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 1 | 11
Available-for-sale securities, Less than 12 Months: Fair Value | $ 627 | $ 16,740
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 2 | $ 163
Available-for-sale securities, 12 Months or More: Number of Securities | security | 14 | 19
Available-for-sale securities, 12 Months or More: Fair Value | $ 11,277 | $ 22,093
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 133 | $ 853
Available-for-sale securities, Total: Number of Securities | security | 15 | 30
Available-for-sale securities, Total: Fair Value | $ 11,904 | $ 38,833
Available-for-sale securities, Total: Unrealized Losses | $ 135 | $ 1,016
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 7 | 10
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 11,239 | $ 16,165
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 15 | $ 79
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 15 | 35
Held-to-maturity securities, 12 Months or More: Fair Value | $ 13,403 | $ 42,431
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 104 | $ 1,231
Held-to-maturity securities, Total: Number of Securities | security | 22 | 45
Held-to-maturity securities, Total: Fair Value | $ 24,642 | $ 58,596
Held-to-maturity securities, Total: Unrealized Losses | $ 119 | $ 1,310
State and political subdivision obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 2 | 3
Available-for-sale securities, Less than 12 Months: Fair Value | $ 1,025 | $ 1,751
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 4 | $ 23
Available-for-sale securities, 12 Months or More: Number of Securities | security | 0 | 51
Available-for-sale securities, 12 Months or More: Fair Value |  | $ 24,520
Available-for-sale securities, 12 Months or More: Unrealized Losses |  | $ 1,374
Available-for-sale securities, Total: Number of Securities | security | 2 | 54
Available-for-sale securities, Total: Fair Value | $ 1,025 | $ 26,271
Available-for-sale securities, Total: Unrealized Losses | $ 4 | $ 1,397
Held-to-maturity securities, Less than 12 Months: Number of Securities | security |  | 26
Held-to-maturity securities, Less than 12 Months: Fair Value |  | $ 11,321
Held-to-maturity securities, Less than 12 Months: Unrealized Losses |  | $ 111
Held-to-maturity securities, 12 Months or More: Number of Securities | security |  | 77
Held-to-maturity securities, 12 Months or More: Fair Value |  | $ 29,460
Held-to-maturity securities, 12 Months or More: Unrealized Losses |  | $ 731
Held-to-maturity securities, Total: Number of Securities | security |  | 103
Held-to-maturity securities, Total: Fair Value |  | $ 40,781
Held-to-maturity securities, Total: Unrealized Losses |  | $ 842
Corporate debt securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security |  | 2
Available-for-sale securities, Less than 12 Months: Fair Value |  | $ 1,996
Available-for-sale securities, Less than 12 Months: Unrealized Losses |  | $ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security |  | 0
Available-for-sale securities, Total: Number of Securities | security |  | 2
Available-for-sale securities, Total: Fair Value |  | $ 1,996
Available-for-sale securities, Total: Unrealized Losses |  | $ 4
Held-to-maturity securities, Less than 12 Months: Number of Securities | security |  | 1
Held-to-maturity securities, Less than 12 Months: Fair Value |  | $ 1,529
Held-to-maturity securities, Less than 12 Months: Unrealized Losses |  | $ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security |  | 0
Held-to-maturity securities, Total: Number of Securities | security |  | 1
Held-to-maturity securities, Total: Fair Value |  | $ 1,529
Held-to-maturity securities, Total: Unrealized Losses |  | $ 10

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