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v3.23.1

Investment Securities - Available for Sale and Held for Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Available-for-sale: [Abstract] |  |
Amortized Cost | $ 1,406,923 | $ 1,432,372
Gross Unrealized Gains | 190 | 143
Gross Unrealized (Losses) | (194,415) | (213,530)
Fair Value | 1,212,698 | 1,218,985
Held-to-maturity: [Abstract] |  |
Held-to-maturity | 2,979 | 2,954
Gross Unrealized Gains | 0 | 0
Unrealized (Losses) | 0 | 0
Fair Value | 2,979 | 2,954
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 253,228 | 252,934
Gross Unrealized Gains | 5 | 0
Gross Unrealized (Losses) | (29,688) | (32,407)
Fair Value | 223,545 | 220,527
Obligations of States and Political Subdivisions |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 339,808 | 347,409
Gross Unrealized Gains | 158 | 134
Gross Unrealized (Losses) | (54,969) | (59,845)
Fair Value | 284,997 | 287,698
Mortgage-backed Securities: GSE Residential |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 730,036 | 744,636
Gross Unrealized Gains | 3 | 3
Gross Unrealized (Losses) | (105,767) | (116,759)
Fair Value | 624,272 | 627,880
Other Securities |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 83,851 | 87,393
Gross Unrealized Gains | 24 | 6
Gross Unrealized (Losses) | (3,991) | (4,519)
Fair Value | 79,884 | 82,880
Other Investments |  |
Held-to-maturity: [Abstract] |  |
Held-to-maturity | 2,979 | 2,954
Gross Unrealized Gains | 0 | 0
Unrealized (Losses) | 0 | 0
Fair Value | $ 2,979 | $ 2,954

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