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Investment Securities - Held to Maturity (Details) $ in Thousands | Sep. 30, 2020 USD ($) security | Dec. 31, 2019 USD ($) security | Sep. 30, 2019 USD ($) security
--- | --- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Amortized Cost | $ 224,799 | $ 245,065 | $ 255,095
Gross Unrealized Gains | 8,745 | 4,647 | 4,077
Gross Unrealized Losses | (43) | (94) | (44)
Held-To-Maturity Securities, at Fair Value | 233,501 | 249,618 | 259,128
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 20,290 |  |
From 1 - 5 Years | 162,791 |  |
From 5 - 10 Years | 40,656 |  |
Over 10 Years | 1,062 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 20,489 |  |
From 1 - 5 Years | 169,107 |  |
From 5 - 10 Years | 42,825 |  |
Over 10 Years | 1,080 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 1,476 | 1,438 | 3,845
12 Months or Longer | 0 | 1,994 | 8,475
Total | $ 1,476 | $ 3,432 | $ 12,320
Number of Securities in a Continuous Loss Position | security | 4 | 10 | 38
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 42 | $ 85 | $ 10
12 Months or Longer | 1 | 9 | 34
Total | 43 | 94 | 44
Equity Securities | 1,511 | 2,063 | 1,996
State and Municipal Obligations |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Amortized Cost | 195,735 | 208,243 | 215,661
Gross Unrealized Gains | 7,488 | 4,170 | 3,669
Gross Unrealized Losses | (43) | (94) | (34)
Held-To-Maturity Securities, at Fair Value | 203,180 | 212,319 | 219,296
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 15,605 |  |
From 1 - 5 Years | 138,412 |  |
From 5 - 10 Years | 40,656 |  |
Over 10 Years | 1,062 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 15,677 |  |
From 1 - 5 Years | 143,598 |  |
From 5 - 10 Years | 42,825 |  |
Over 10 Years | 1,080 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 1,476 | 1,438 | 763
12 Months or Longer | 0 | 1,994 | 6,764
Total | $ 1,476 | $ 3,432 | $ 7,527
Number of Securities in a Continuous Loss Position | security | 4 | 10 | 19
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 42 | $ 85 | $ 1
12 Months or Longer | 1 | 9 | 33
Total | 43 | 94 | 34
Mortgage-Backed Securities - Residential |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Amortized Cost | 29,064 | 36,822 | 39,434
Gross Unrealized Gains | 1,257 | 477 | 408
Gross Unrealized Losses | 0 | 0 | (10)
Held-To-Maturity Securities, at Fair Value | 30,321 | 37,299 | 39,832
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 4,685 |  |
From 1 - 5 Years | 24,379 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 4,812 |  |
From 1 - 5 Years | 25,509 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 0 | 0 | 3,082
12 Months or Longer | 0 | 0 | 1,711
Total | $ 0 | $ 0 | $ 4,793
Number of Securities in a Continuous Loss Position | security | 0 | 0 | 19
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 0 | $ 0 | $ 9
12 Months or Longer | 0 | 0 | 1
Total | 0 | 0 | 10
Fair Value, Measurements, Recurring |  |  |
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Equity Securities | 1,511 | 2,063 | 1,996
Collateral Pledged |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, Pledged as Collateral, at Fair Value | 221,844 | 237,969 | 244,373
US Government Agencies Debt Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Amortized Cost | 10,669 | 1,703 | 1,844
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring | Mortgage-Backed Securities - Residential |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Fair Value | 11,049 | 1,720 | 1,854
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Amortized Cost | 18,395 | 35,119 | 37,590
US Government-sponsored Enterprises Debt Securities | Fair Value, Measurements, Recurring | Mortgage-Backed Securities - Residential |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Held-To-Maturity Securities, at Fair Value | $ 19,272 | $ 35,579 | $ 37,978

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