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v3.23.2

Securities, Held to Maturity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | $ 912,876 |  | $ 912,876 |  | $ 919,517
Unrealized gains | 135 |  | 135 |  | 209
Unrealized losses | (104,370) |  | (104,370) |  | (107,079)
Estimated fair value | 808,641 |  | 808,641 |  | 812,647
Allowance for credit losses on HTM securities | 0 |  | 0 |  | 0
Transactions of HTM securities [Abstract] |  |  |  |  |
Gains from calls on HTM securities | 0 | $ 0 | 0 | $ 4 |
Asset Pledged as Collateral [Member] | Public Deposits or Other Purposes [Member] |  |  |  |  |
Securities pledged [Abstract] |  |  |  |  |
AFS and HTM securities | 1,680,000 |  | 1,680,000 |  | 1,730,000
Asset Pledged as Collateral [Member] | Securities Sold under Repurchase Agreements [Member] |  |  |  |  |
Securities pledged [Abstract] |  |  |  |  |
AFS and HTM securities | 142,700 |  | 142,700 |  | 149,500
Federal Agency [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 100,000 |  | 100,000 |  | 100,000
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (19,620) |  | (19,620) |  | (20,678)
Estimated fair value | 80,380 |  | 80,380 |  | 79,322
Mortgage-Backed, Government Sponsored Enterprises [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 239,102 |  | 239,102 |  | 249,511
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (35,641) |  | (35,641) |  | (36,819)
Estimated fair value | 203,461 |  | 203,461 |  | 212,692
Mortgage-Backed, U.S. Government Agency Securities [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 17,391 |  | 17,391 |  | 18,396
Unrealized gains | 1 |  | 1 |  | 4
Unrealized losses | (827) |  | (827) |  | (619)
Estimated fair value | 16,565 |  | 16,565 |  | 17,781
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 197,597 |  | 197,597 |  | 207,738
Unrealized gains | 84 |  | 84 |  | 200
Unrealized losses | (15,575) |  | (15,575) |  | (14,876)
Estimated fair value | 182,106 |  | 182,106 |  | 193,062
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 65,298 |  | 65,298 |  | 66,628
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (11,007) |  | (11,007) |  | (9,842)
Estimated fair value | 54,291 |  | 54,291 |  | 56,786
State & Municipal [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 293,488 |  | 293,488 |  | 277,244
Unrealized gains | 50 |  | 50 |  | 5
Unrealized losses | (21,700) |  | (21,700) |  | (24,245)
Estimated fair value | $ 271,838 |  | $ 271,838 |  | $ 253,004

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