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Loans and Allowance for Credit Losses on Loans - Credit Risk Profile of Loan Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Credit risk profile of portfolio |  |
2023 | $ 603,735 | $ 2,115,132
2022 | 1,832,813 | 1,954,111
2021 | 1,868,867 | 454,876
2020 | 338,696 | 136,666
2019 | 59,163 | 74,113
Prior | 112,293 | 58,347
Revolving Loans | 5,950,658 | 5,406,308
Loans | 10,766,225 | 10,199,553
Net Charge-Offs |  |
2022 |  | 8,896
2021 |  | 274
2020 | 925 | 586
Prior |  | 22
Revolving Loans |  | 13
Net Charge-Offs | 925 | 9,791
Pass |  |
Credit risk profile of portfolio |  |
2023 | 571,416 | 1,947,008
2022 | 1,677,746 | 1,902,347
2021 | 1,802,354 | 409,166
2020 | 293,914 | 135,601
2019 | 58,156 | 73,977
Prior | 110,398 | 55,806
Revolving Loans | 5,896,764 | 5,355,754
Loans | 10,410,748 | 9,879,659
Special Mention |  |
Credit risk profile of portfolio |  |
2023 | 32,319 | 130,842
2022 | 117,800 | 12,709
2021 | 38,061 | 8,692
2020 | 8,689 | 187
2019 | 157 | 74
Prior | 1,688 | 2,053
Revolving Loans | 33,408 | 36,710
Loans | 232,122 | 191,267
Substandard |  |
Credit risk profile of portfolio |  |
2023 |  | 37,282
2022 | 37,267 | 39,055
2021 | 28,452 | 37,018
2020 | 36,093 | 878
2019 | 850 | 62
Prior | 207 | 438
Revolving Loans | 20,486 | 13,844
Loans | 123,355 | 128,577
Doubtful |  |
Credit risk profile of portfolio |  |
Prior |  | 50
Loans |  | 50
Mortgage warehouse lines of credit |  |
Credit risk profile of portfolio |  |
Revolving Loans | 1,142,994 | 752,468
Loans | 1,142,994 | 752,468
Mortgage warehouse lines of credit | Pass |  |
Credit risk profile of portfolio |  |
Revolving Loans | 1,142,994 | 752,468
Loans | 1,142,994 | 752,468
Residential real estate |  |
Credit risk profile of portfolio |  |
2023 | 1,780 | 31,011
2022 | 32,353 | 10,086
2021 | 9,793 | 6,573
2020 | 6,175 | 22,725
2019 | 21,315 | 3,357
Prior | 7,618 | 10,120
Revolving Loans | 1,242,266 | 1,240,433
Loans | 1,321,300 | 1,324,305
Net Charge-Offs |  |
Prior |  | 21
Revolving Loans |  | 13
Net Charge-Offs |  | 34
Residential real estate | Pass |  |
Credit risk profile of portfolio |  |
2023 | 1,780 | 31,011
2022 | 32,353 | 10,086
2021 | 9,793 | 6,573
2020 | 6,175 | 22,725
2019 | 21,315 | 3,298
Prior | 7,400 | 9,340
Revolving Loans | 1,240,994 | 1,239,161
Loans | 1,319,810 | 1,322,194
Residential real estate | Special Mention |  |
Credit risk profile of portfolio |  |
2019 |  | 59
Prior | 218 | 492
Loans | 218 | 551
Residential real estate | Substandard |  |
Credit risk profile of portfolio |  |
Prior |  | 288
Revolving Loans | 1,272 | 1,272
Loans | 1,272 | 1,560
Multi-family financing |  |
Credit risk profile of portfolio |  |
2023 | 306,730 | 1,201,353
2022 | 1,065,586 | 793,997
2021 | 790,990 | 223,277
2020 | 129,287 | 77,340
2019 | 9,070 | 29,764
Prior | 36,057 | 9,932
Revolving Loans | 1,758,886 | 1,670,497
Loans | 4,096,606 | 4,006,160
Net Charge-Offs |  |
2022 |  | 8,400
Net Charge-Offs |  | 8,400
Multi-family financing | Pass |  |
Credit risk profile of portfolio |  |
2023 | 298,730 | 1,094,698
2022 | 957,019 | 762,448
2021 | 734,071 | 208,343
2020 | 114,353 | 77,340
2019 | 9,070 | 29,764
Prior | 34,587 | 8,455
Revolving Loans | 1,731,470 | 1,646,445
Loans | 3,879,300 | 3,827,493
Multi-family financing | Special Mention |  |
Credit risk profile of portfolio |  |
2023 | 8,000 | 94,973
2022 | 96,900 | 3,189
2021 | 28,559 | 8,400
2020 | 8,400 |
Prior | 1,470 | 1,477
Revolving Loans | 20,777 | 24,052
Loans | 164,106 | 132,091
Multi-family financing | Substandard |  |
Credit risk profile of portfolio |  |
2023 |  | 11,682
2022 | 11,667 | 28,360
2021 | 28,360 | 6,534
2020 | 6,534 |
Revolving Loans | 6,639 |
Loans | 53,200 | 46,576
Healthcare financing |  |
Credit risk profile of portfolio |  |
2023 | 282,923 | 814,060
2022 | 672,888 | 1,016,418
2021 | 946,382 | 138,980
2020 | 127,598 |
2019 |  | 14,563
Prior | 14,459 |
Revolving Loans | 420,435 | 372,668
Loans | 2,464,685 | 2,356,689
Healthcare financing | Pass |  |
Credit risk profile of portfolio |  |
2023 | 258,604 | 752,591
2022 | 626,388 | 996,273
2021 | 936,880 | 110,197
2020 | 98,815 |
2019 |  | 14,563
Prior | 14,459 |
Revolving Loans | 398,904 | 351,110
Loans | 2,334,050 | 2,224,734
Healthcare financing | Special Mention |  |
Credit risk profile of portfolio |  |
2023 | 24,319 | 35,869
2022 | 20,900 | 9,520
2021 | 9,502 |
Revolving Loans | 12,631 | 12,658
Loans | 67,352 | 58,047
Healthcare financing | Substandard |  |
Credit risk profile of portfolio |  |
2023 |  | 25,600
2022 | 25,600 | 10,625
2021 |  | 28,783
2020 | 28,783 |
Revolving Loans | 8,900 | 8,900
Loans | 63,283 | 73,908
Commercial and commercial real estate |  |
Credit risk profile of portfolio |  |
2023 | 4,469 | 51,110
2022 | 54,002 | 119,456
2021 | 116,571 | 79,309
2020 | 72,889 | 22,204
2019 | 20,210 | 21,150
Prior | 34,229 | 17,200
Revolving Loans | 1,364,381 | 1,332,652
Loans | 1,666,751 | 1,643,081
Net Charge-Offs |  |
2022 |  | 496
2021 |  | 274
2020 | 925 | 586
Net Charge-Offs | 925 | 1,356
Commercial and commercial real estate | Pass |  |
Credit risk profile of portfolio |  |
2023 | 4,469 | 51,110
2022 | 54,002 | 119,386
2021 | 116,479 | 77,316
2020 | 71,824 | 21,154
2019 | 19,203 | 21,088
Prior | 34,169 | 17,066
Revolving Loans | 1,360,706 | 1,328,980
Loans | 1,660,852 | 1,636,100
Commercial and commercial real estate | Special Mention |  |
Credit risk profile of portfolio |  |
2021 |  | 292
2020 | 289 | 172
2019 | 157 |
Prior |  | 84
Loans | 446 | 548
Commercial and commercial real estate | Substandard |  |
Credit risk profile of portfolio |  |
2022 |  | 70
2021 | 92 | 1,701
2020 | 776 | 878
2019 | 850 | 62
Prior | 60 |
Revolving Loans | 3,675 | 3,672
Loans | 5,453 | 6,383
Commercial and commercial real estate | Doubtful |  |
Credit risk profile of portfolio |  |
Prior |  | 50
Loans |  | 50
Agricultural production and real estate |  |
Credit risk profile of portfolio |  |
2023 | 7,833 | 16,850
2022 | 7,875 | 9,825
2021 | 5,103 | 6,490
2020 | 2,722 | 14,267
2019 | 8,566 | 5,237
Prior | 15,662 | 16,753
Revolving Loans | 18,216 | 33,728
Loans | 65,977 | 103,150
Agricultural production and real estate | Pass |  |
Credit risk profile of portfolio |  |
2023 | 7,833 | 16,850
2022 | 7,875 | 9,825
2021 | 5,103 | 6,490
2020 | 2,722 | 14,267
2019 | 8,566 | 5,237
Prior | 15,515 | 16,606
Revolving Loans | 18,216 | 33,728
Loans | 65,830 | 103,003
Agricultural production and real estate | Substandard |  |
Credit risk profile of portfolio |  |
Prior | 147 | 147
Loans | 147 | 147
Consumer and margin loans |  |
Credit risk profile of portfolio |  |
2023 |  | 748
2022 | 109 | 4,329
2021 | 28 | 247
2020 | 25 | 130
2019 | 2 | 42
Prior | 4,268 | 4,342
Revolving Loans | 3,480 | 3,862
Loans | 7,912 | 13,700
Net Charge-Offs |  |
Prior |  | 1
Net Charge-Offs |  | 1
Consumer and margin loans | Pass |  |
Credit risk profile of portfolio |  |
2023 |  | 748
2022 | 109 | 4,329
2021 | 28 | 247
2020 | 25 | 115
2019 | 2 | 27
Prior | 4,268 | 4,339
Revolving Loans | 3,480 | 3,862
Loans | $ 7,912 | 13,667
Consumer and margin loans | Special Mention |  |
Credit risk profile of portfolio |  |
2020 |  | 15
2019 |  | 15
Loans |  | 30
Consumer and margin loans | Substandard |  |
Credit risk profile of portfolio |  |
Prior |  | 3
Loans |  | $ 3

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