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Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Due within 1 year | $ 512 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 512 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 2,741 | $ 387
Debt Securities, Held-to-maturity | 357,890 | 393,855
Securities held to maturity, fair value | 360,224 | $ 383,993
Due after 1 but within 5 years | 8,084 |
Due after 5 but within 10 years | 33,902 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | 34,464 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value | 8,144 |
Due after 10 years | 0 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | 0 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost | 42,498 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value | 43,120 |
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost | 315,392 |
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value | 317,104 |
US Government Agencies Residential Mortgage-backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 57,800 |
Securities held to maturity, fair value | 57,900 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 257,600 |
Securities held to maturity, fair value | $ 259,200 |

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