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Securities - Schedule of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | $ 165,489 | $ 1,018,313
Less than 12 Months, Unrealized Loss | (7,776) | (177,161)
12 Months or More, Fair Value | 1,409,155 | 603,633
12 Months or More, Unrealized Loss | (284,837) | (156,691)
Total Fair Value | 1,574,644 | 1,621,946
Total Unrealized Loss | (292,613) | (333,852)
U.S. Treasury |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Loss | 0 | 0
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Loss | 0 | 0
Total Fair Value | 0 | 0
Total Unrealized Loss | 0 | 0
Obligations of State and Political Subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 89,866 | 579,267
Less than 12 Months, Unrealized Loss | (3,578) | (117,423)
12 Months or More, Fair Value | 597,155 | 122,992
12 Months or More, Unrealized Loss | (134,669) | (44,591)
Total Fair Value | 687,021 | 702,259
Total Unrealized Loss | (138,247) | (162,014)
MBS/CMO |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 64,508 | 240,344
Less than 12 Months, Unrealized Loss | (3,421) | (20,920)
12 Months or More, Fair Value | 627,839 | 474,327
12 Months or More, Unrealized Loss | (116,121) | (110,918)
Total Fair Value | 692,347 | 714,671
Total Unrealized Loss | (119,542) | (131,838)
US Gov’t Sponsored Entities & Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months, Fair Value | 11,115 | 198,702
Less than 12 Months, Unrealized Loss | (777) | (38,818)
12 Months or More, Fair Value | 184,161 | 6,314
12 Months or More, Unrealized Loss | (34,047) | (1,182)
Total Fair Value | 195,276 | 205,016
Total Unrealized Loss | $ (34,824) | $ (40,000)

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