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Securities - Amortized Cost and Fair Value (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 USD ($) item | Dec. 31, 2023 USD ($)
Securities Available-for-Sale |  |
Amortized Cost | $ 1,256,285 | $ 1,276,981
Gross Unrealized Gains | 1,138 | 1,818
Gross Unrealized Losses | (83,762) | (85,970)
Securities available-for-sale | 1,173,661 | 1,192,829
Accrued interest receivable | 6,700 | 6,600
FHLB and FRB Stock |  |
FHLBC stock | 17,100 | 18,500
FRBC stock | 14,900 | 14,900
Securities pledged to secure deposits and for other purposes | 762,200 | 810,200
Other disclosures |  |
Securities available-for-sale | $ 1,173,661 | 1,192,829
Number of securities issued from originators | item | 0 |
Number of originators | item | 1 |
Minimum percentage of securities investment | 10.00% |
U.S. Treasury |  |
Securities Available-for-Sale |  |
Amortized Cost | $ 193,615 | 174,602
Gross Unrealized Gains | 146 |
Gross Unrealized Losses | (2,487) | (5,028)
Securities available-for-sale | 191,274 | 169,574
Other disclosures |  |
Securities available-for-sale | 191,274 | 169,574
U.S. government agencies |  |
Securities Available-for-Sale |  |
Amortized Cost | 39,653 | 60,011
Gross Unrealized Losses | (2,355) | (3,052)
Securities available-for-sale | 37,298 | 56,959
Other disclosures |  |
Securities available-for-sale | 37,298 | 56,959
U.S. government agencies mortgage-backed |  |
Securities Available-for-Sale |  |
Amortized Cost | 109,490 | 118,492
Gross Unrealized Losses | (12,618) | (12,122)
Securities available-for-sale | 96,872 | 106,370
Other disclosures |  |
Securities available-for-sale | 96,872 | 106,370
States and political subdivisions |  |
Securities Available-for-Sale |  |
Amortized Cost | 232,373 | 236,072
Gross Unrealized Gains | 470 | 1,325
Gross Unrealized Losses | (12,578) | (10,332)
Securities available-for-sale | 220,265 | 227,065
Other disclosures |  |
Securities available-for-sale | 220,265 | 227,065
Collateralized mortgage obligations |  |
Securities Available-for-Sale |  |
Amortized Cost | 436,623 | 442,987
Gross Unrealized Gains | 321 | 421
Gross Unrealized Losses | (50,889) | (50,864)
Securities available-for-sale | 386,055 | 392,544
Other disclosures |  |
Securities available-for-sale | 386,055 | 392,544
Asset-backed Securities |  |
Securities Available-for-Sale |  |
Amortized Cost | 67,634 | 71,616
Gross Unrealized Gains | 6 | 42
Gross Unrealized Losses | (2,763) | (3,222)
Securities available-for-sale | 64,877 | 68,436
Other disclosures |  |
Securities available-for-sale | 64,877 | 68,436
Collateralized loan obligations. |  |
Securities Available-for-Sale |  |
Amortized Cost | 176,897 | 173,201
Gross Unrealized Gains | 195 | 30
Gross Unrealized Losses | (72) | (1,350)
Securities available-for-sale | 177,020 | 171,881
Other disclosures |  |
Securities available-for-sale | $ 177,020 | $ 171,881

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