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Investment Securities (Unrealized Gains and Losses by Category) (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
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Available For Sale Securities Continuous Unrealized Loss Position Amortized Cost [Abstract] |  |
Available for sale - Amortized cost - less than 12 month | $ 109,088,000 | $ 39,732,000
Available for sale - Amortized cost - more than 12 month | 0 | 0
Total Available for Sale Amortization cost | 109,088,000 | 39,732,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |
Available for sale - Unrealized Loss - less than 12 month | 3,753,000 | 210,000
Total Available for Sale Unrealized Loss | 3,753,000 | 210,000
Available For Sale Securities Continuous Unrealized Loss Position Fair Value [Abstract] |  |
Available for sale - Fair Value - less than 12 month | 105,335,000 | 39,522,000
Total Available for Sale Fair Value | 105,335,000 | 39,522,000
FNMA and FHLMC [Member] |  |
Available For Sale Securities Continuous Unrealized Loss Position Amortized Cost [Abstract] |  |
Available for sale - Amortized cost - less than 12 month | 108,552,000 | 34,628,000
Total Available for Sale Amortization cost | 108,552,000 | 34,628,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |
Available for sale - Unrealized Loss - less than 12 month | 3,750,000 | 32,000
Total Available for Sale Unrealized Loss | 3,750,000 | 32,000
Available For Sale Securities Continuous Unrealized Loss Position Fair Value [Abstract] |  |
Available for sale - Fair Value - less than 12 month | 104,802,000 | 34,596,000
Total Available for Sale Fair Value | 104,802,000 | 34,596,000
Continuous Unrealized Loss Position Amortized Cost [Abstract] |  |
Held to Maturity - Amortized cost - less than 12 month | 126,767,000 |
Held to Maturity - Amortized Cost | 126,767,000 |
Held To Maturity Securities, Continuous Unrealized Loss Position Aggregate Losses [Abstract] |  |
Held to Maturity- Unrealized Loss - less than 12 month | 1,289,000 |
Held to Maturity- Unrealized Loss | 1,289,000 |
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value [Abstract] |  |
Held-to-Maturity - Fair Value - less than 12 Month | 125,478,000 |
Held to Maturity - Fair Value | 125,478,000 |
Government National Mortgage Association Certificates and Obligations (GNMA) [Member] |  |
Available For Sale Securities Continuous Unrealized Loss Position Amortized Cost [Abstract] |  |
Available for sale - Amortized cost - less than 12 month | 536,000 | 5,104,000
Total Available for Sale Amortization cost | 536,000 | 5,104,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |  |
Available for sale - Unrealized Loss - less than 12 month | 3,000 | 178,000
Total Available for Sale Unrealized Loss | 3,000 | 178,000
Available For Sale Securities Continuous Unrealized Loss Position Fair Value [Abstract] |  |
Available for sale - Fair Value - less than 12 month | 533,000 | 4,926,000
Total Available for Sale Fair Value | $ 533,000 | $ 4,926,000

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