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Investment Securities - Summary of Held-to-maturity Securities with Unrealized Loss (Details) $ in Thousands | Jun. 30, 2025 USD ($) security | Dec. 31, 2024 USD ($) security
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Schedule of Held-to-maturity Securities [Line Items] |  |
Less than 12 months, fair value | $ 203,739 | $ 277,526
Less than 12 months, unrealized loss | $ 2,746 | $ 6,697
Less than 12 months, no. of securities | security | 39 | 62
12 months or more, fair value | $ 350,489 | $ 346,649
12 months or more, unrealized loss | $ 67,942 | $ 76,214
12 months or more, no. of securities | security | 151 | 149
Total fair value | $ 554,228 | $ 624,175
Total unrealized loss | 70,688 | 82,911
U.S. government sponsored agencies |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Less than 12 months, fair value | 137,853 | 150,390
Less than 12 months, unrealized loss | $ 1,552 | $ 2,464
Less than 12 months, no. of securities | security | 25 | 29
12 months or more, fair value | $ 37,108 | $ 38,901
12 months or more, unrealized loss | $ 6,809 | $ 7,763
12 months or more, no. of securities | security | 10 | 11
Total fair value | $ 174,961 | $ 189,291
Total unrealized loss | 8,361 | 10,227
States and political subdivisions |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Less than 12 months, fair value | 895 | 957
Less than 12 months, unrealized loss | $ 107 | $ 44
Less than 12 months, no. of securities | security | 1 | 1
12 months or more, fair value | $ 108,382 | $ 106,716
12 months or more, unrealized loss | $ 29,634 | $ 31,672
12 months or more, no. of securities | security | 66 | 66
Total fair value | $ 109,277 | $ 107,673
Total unrealized loss | 29,741 | 31,716
Residential mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Less than 12 months, fair value | 58,212 | 116,576
Less than 12 months, unrealized loss | $ 988 | $ 2,808
Less than 12 months, no. of securities | security | 11 | 27
12 months or more, fair value | $ 129,811 | $ 130,556
12 months or more, unrealized loss | $ 17,370 | $ 21,485
12 months or more, no. of securities | security | 43 | 43
Total fair value | $ 188,023 | $ 247,132
Total unrealized loss | 18,358 | 24,293
Commercial mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Less than 12 months, fair value | 6,779 | 9,603
Less than 12 months, unrealized loss | $ 99 | $ 1,381
Less than 12 months, no. of securities | security | 2 | 5
12 months or more, fair value | $ 75,188 | $ 70,476
12 months or more, unrealized loss | $ 14,129 | $ 15,294
12 months or more, no. of securities | security | 32 | 29
Total fair value | $ 81,967 | $ 80,079
Total unrealized loss | $ 14,228 | $ 16,675

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- Definition Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, 12 Months or Longer, Number of Positions + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A + Details
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