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Fair Value of Financial Instruments - Quantitative Information About Recurring Level 3 Fair Value of Financial Instruments (Details) $ in Thousands | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Securities available for sale, fair value | $ 761,221 | $ 647,974
Valuation Technique, Discounted Cash Flow [Member] | Junior Subordinated Debentures [Member] |  |
Borrowings | $ 44,712 | $ 43,136
Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | Measurement Input, Discount Rate [Member] | Junior Subordinated Debentures [Member] |  |
Liabilities, Weighted average | 4.1 | 4.2
Trust Preferred Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Securities available for sale, fair value | $ 1,342 | $ 1,295
Trust Preferred Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | Measurement Input, Discount Rate [Member] |  |
Assets, Weighted average | 4.1 | 4.2

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