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v3.23.1

Investment Securities - Additional Information (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2023 USD ($) | Mar. 31, 2023 USD ($) Security | Dec. 31, 2022 USD ($) Security
Available-for-sale Securities, Amortized Cost Basis [Abstract] |  |  |
Number of securities in unrealized loss positions, twelve months or more | Security |  | 89 | 57
Available for sale securities unrealized aggregate loss |  | $ 12,468 | $ 11,515
Available-for-sale investment securities aggregate, amortized historical cost |  | 199,300 |
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost |  | $ 13,200 | $ 14,800
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage |  | (6.70%) | (7.20%)
Available-for-sale investment securities decline in fair value and amortized historical cost |  | $ 1,600 |
Held-to-maturity Securities [Abstract] |  |  |
Available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis |  |  | $ 205,400
Provision for credit losses | $ 0 |  |
Gain (Loss) on Sale of Investments [Abstract] |  |  |
Securities pledged to collateralize deposit |  | 134,600 | 86,000
Securities pledged to collateralize borrowing |  | 75,500 | $ 39,900
Investment securities, aggregate book value | $ 450,000 |  |
Aggregate fair value |  | $ 846,000 |
State and Political Subdivisions [Member] |  |  |
Available-for-sale Securities, Amortized Cost Basis [Abstract] |  |  |
Number of securities in unrealized loss positions, twelve months or more | Security |  | 23 | 17
Available for sale securities unrealized aggregate loss |  | $ 2,294 | $ 2,171
Held-to-maturity Securities [Abstract] |  |  |
Held-to-maturity securities aggregate unrealized loss |  | $ 1,734 | $ 1,469
Number of securities in unrealized loss positions, twelve months or more | Security |  | 12 | 7
Held-to-maturity securities aggregate unrealized loss |  | $ 1,734 | $ 1,469
Twelve months or more Fair Value |  | 10,620 | 5,077
Debt Securities [Member] |  |  |
Held-to-maturity Securities [Abstract] |  |  |
Held-to-maturity securities aggregate unrealized loss |  | $ 9,092 | $ 4,664
Number of securities in unrealized loss positions, twelve months or more | Security |  | 82 | 29
Held-to-maturity securities aggregate unrealized loss |  | $ 9,092 | $ 4,664
Twelve months or more Fair Value |  | 91,235 | $ 29,085
Held-to-Maturity Securities [Member] |  |  |
Available-for-sale Securities, Amortized Cost Basis [Abstract] |  |  |
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis |  | 201,700 |
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost |  | $ 12,100 |
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage |  | (4.50%) |

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- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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