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Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | $ 745 | $ 33,161
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 2 | 619
Held to Maturity, Losses 12 months or longer, Fair Value | 2,890 | 52,253
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 15 | 489
Held to Maturity, Total, Fair Value | 3,635 | 85,414
Held to Maturity, Total, Gross Unrealized Losses | 17 | 1,108
Municipal Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 523 | 4,735
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 2 | 38
Held to Maturity, Losses 12 months or longer, Fair Value | 2,890 | 3,143
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 15 | 31
Held to Maturity, Total, Fair Value | 3,413 | 7,878
Held to Maturity, Total, Gross Unrealized Losses | 17 | 69
Commercial Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 222 | 28,426
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses |  | 581
Held to Maturity, Total, Fair Value | $ 222 | 28,426
Held to Maturity, Total, Gross Unrealized Losses |  | 581
Collateralized Mortgage Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses 12 months or longer, Fair Value |  | 49,110
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses |  | 458
Held to Maturity, Total, Fair Value |  | 49,110
Held to Maturity, Total, Gross Unrealized Losses |  | $ 458

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