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Securities - Securities with Unrealized Losses Aggregated by Investment Category and Time with Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | $ 22,394 | $ 153,118
Less than 12 months, unrealized losses | 1,533 | 15,751
More than 12 months, fair value | 498,557 | 375,245
More than 12 months, unrealized losses | 78,100 | 73,290
Total, fair value | 520,951 | 528,363
Total, unrealized losses | 79,633 | 89,041
U.S. Treasury Notes and Bonds [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | 0 | 0
Less than 12 months, unrealized losses | 0 | 0
More than 12 months, fair value | 78,395 | 78,204
More than 12 months, unrealized losses | 12,184 | 12,606
Total, fair value | 78,395 | 78,204
Total, unrealized losses | 12,184 | 12,606
State and Municipal [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | 1,311 | 89,158
Less than 12 months, unrealized losses | 31 | 12,612
More than 12 months, fair value | 231,235 | 140,390
More than 12 months, unrealized losses | 39,112 | 34,939
Total, fair value | 232,546 | 229,548
Total, unrealized losses | 39,143 | 47,551
Mortgage-backed [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | 21,083 | 63,249
Less than 12 months, unrealized losses | 1,502 | 3,093
More than 12 months, fair value | 176,566 | 144,318
More than 12 months, unrealized losses | 26,262 | 25,047
Total, fair value | 197,649 | 207,567
Total, unrealized losses | 27,764 | 28,140
Corporate [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | 0 | 711
Less than 12 months, unrealized losses | 0 | 46
More than 12 months, fair value | 705 | 0
More than 12 months, unrealized losses | 54 | 0
Total, fair value | 705 | 711
Total, unrealized losses | 54 | 46
Asset-backed Securities [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Less than 12 months, fair value | 0 | 0
Less than 12 months, unrealized losses | 0 | 0
More than 12 months, fair value | 11,656 | 12,333
More than 12 months, unrealized losses | 488 | 698
Total, fair value | 11,656 | 12,333
Total, unrealized losses | $ 488 | $ 698

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