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Investment Securities (Gross Unrealized Losses and Fair Value by Length of Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | $ 829 | $ 15,060
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 7 | 271
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 141,639 | 132,266
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 2,131 | 3,861
Available-for-sale securities, continuous unrealized loss position, fair value | 142,468 | 147,326
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 2,138 | 4,132
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value | 2,967 | 2,968
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 33 | 32
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value | 1,487 | 1,617
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 11 | 25
Held-to-maturity securities, continuous unrealized loss position, fair value | 4,454 | 4,585
Held-to-maturity securities, continuous unrealized loss position, unrealized losses | 44 | 57
Mortgage-backed [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value |  | 13,981
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses |  | 261
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 109,014 | 99,904
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 1,752 | 3,220
Available-for-sale securities, continuous unrealized loss position, fair value | 109,014 | 113,885
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 1,752 | 3,481
U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 829 | 1,079
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 7 | 10
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 32,625 | 32,362
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 379 | 641
Available-for-sale securities, continuous unrealized loss position, fair value | 33,454 | 33,441
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 386 | 651
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value | 1,487 | 1,617
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 11 | 25
Held-to-maturity securities, continuous unrealized loss position, fair value | 1,487 | 1,617
Held-to-maturity securities, continuous unrealized loss position, unrealized losses | 11 | 25
Other Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value | 2,967 | 2,968
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 33 | 32
Held-to-maturity securities, continuous unrealized loss position, fair value | 2,967 | 2,968
Held-to-maturity securities, continuous unrealized loss position, unrealized losses | $ 33 | $ 32

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