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Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 1,585,253 | $ 1,415,959
Gross Unrealized Gains | 156 | 25,455
Gross Unrealized Losses | (290,276) | (13,737)
Fair Value | 1,295,133 | 1,427,677
U.S. Treasury and U.S. government sponsored entities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 149,549 | 93,137
Gross Unrealized Gains | 0 | 32
Gross Unrealized Losses | (21,733) | (2,338)
Fair Value | 127,816 | 90,831
State and political subdivisions |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 686,456 | 636,724
Gross Unrealized Gains | 100 | 23,296
Gross Unrealized Losses | (137,528) | (1,205)
Fair Value | 549,028 | 658,815
Corporate bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 4,386 | 4,009
Gross Unrealized Gains | 0 | 50
Gross Unrealized Losses | (303) | (29)
Fair Value | 4,083 | 4,030
Mortgage-backed securities - residential |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 687,352 | 663,405
Gross Unrealized Gains | 56 | 1,875
Gross Unrealized Losses | (126,126) | (10,094)
Fair Value | 561,282 | 655,186
Collateralized mortgage obligations - residential |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 53,390 | 13,303
Gross Unrealized Gains | 0 | 153
Gross Unrealized Losses | (4,178) | (71)
Fair Value | 49,212 | 13,385
Small Business Administration |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 4,120 | 5,381
Gross Unrealized Gains | 0 | 49
Gross Unrealized Losses | (408) | 0
Fair Value | $ 3,712 | $ 5,430

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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