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Segment Reporting - Summary of Segment Reporting Information by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023
INTEREST INCOME |  |  |
Interest income |  | $ 160,320 | $ 168,995
Interest expense |  | 81,659 | 75,954
Net interest income |  | 78,661 | 93,041
(Recovery of) provision for credit losses |  | (5,100) | 22,323
Net interest income after provision for credit losses |  | 83,761 | 70,718
NONINTEREST INCOME |  |  |
Fair value adjustments of other equity investments |  | (8,152) | (110)
Residential mortgage banking income |  | 10,391 | 11,878
Mortgage servicing rights |  | 629 | (1,878)
Loss on sale of mortgage servicing rights |  | (3,607) | 0
Other |  | 14,312 | 18,485
Total noninterest income |  | 13,573 | 28,375
NONINTEREST EXPENSE |  |  |
Salaries and employee benefits |  | 58,161 | 58,158
Occupancy |  | 5,577 | 6,506
Technology and communication |  | 10,024 | 10,096
Regulatory remediation |  | 4,671 | 10,459
Other |  | 35,408 | 39,892
Goodwill impairment | $ 26,800 | 0 | 26,826
ESOP litigation |  |  | 6,000
Total noninterest expenses |  | 113,841 | 157,937
Loss before income taxes |  | (16,507) | (58,844)
Income tax benefit |  | (1,122) | (7,071)
Discontinued Operations |  |  |
Net loss |  | (15,385) | (51,773)
Total assets |  | 2,737,260 | 3,117,554
Commercial Banking [Member] |  |  |
INTEREST INCOME |  |  |
Interest income |  | 158,855 | 167,340
Interest expense |  | 78,577 | 72,952
Net interest income |  | 80,278 | 94,388
(Recovery of) provision for credit losses |  | (5,100) | 22,323
Net interest income after provision for credit losses |  | 85,378 | 72,065
NONINTEREST INCOME |  |  |
Fair value adjustments of other equity investments |  | 0 | 0
Residential mortgage banking income |  | 0 | 0
Mortgage servicing rights |  | 0 | 0
Loss on sale of mortgage servicing rights |  | 0 |
Other |  | 14,874 | 20,466
Total noninterest income |  | 14,874 | 20,466
NONINTEREST EXPENSE |  |  |
Salaries and employee benefits |  | 52,421 | 49,860
Occupancy |  | 5,137 | 5,497
Technology and communication |  | 8,670 | 8,722
Regulatory remediation |  | 4,671 | 10,459
Other |  | 31,913 | 34,013
Goodwill impairment |  |  | 26,826
ESOP litigation |  |  | 0
Total noninterest expenses |  | 102,812 | 135,377
Loss before income taxes |  | (2,560) | (42,846)
Income tax benefit |  | 2,118 | (3,571)
Discontinued Operations |  |  |
Net loss |  | (4,678) | (39,275)
Total assets |  | 2,704,917 | 3,053,453
Mortgage Banking [Member] |  |  |
INTEREST INCOME |  |  |
Interest income |  | 1,465 | 1,641
Interest expense |  | 668 | 793
Net interest income |  | 797 | 848
(Recovery of) provision for credit losses |  | 0 | 0
Net interest income after provision for credit losses |  | 797 | 848
NONINTEREST INCOME |  |  |
Fair value adjustments of other equity investments |  | 0 | 0
Residential mortgage banking income |  | 10,391 | 11,878
Mortgage servicing rights |  | 629 | (1,878)
Loss on sale of mortgage servicing rights |  | (3,607) |
Other |  | 0 | 0
Total noninterest income |  | 7,413 | 10,000
NONINTEREST EXPENSE |  |  |
Salaries and employee benefits |  | 5,740 | 8,298
Occupancy |  | 440 | 1,009
Technology and communication |  | 1,354 | 1,374
Regulatory remediation |  | 0 | 0
Other |  | 2,494 | 2,842
Goodwill impairment |  |  | 0
ESOP litigation |  |  | 0
Total noninterest expenses |  | 10,028 | 13,523
Loss before income taxes |  | (1,818) | (2,675)
Income tax benefit |  | (554) | (877)
Discontinued Operations |  |  |
Net loss |  | (1,264) | (1,798)
Total assets |  | 27,756 | 39,010
Parents Only [Member] |  |  |
INTEREST INCOME |  |  |
Interest income |  | 0 | 14
Interest expense |  | 2,414 | 2,209
Net interest income |  | (2,414) | (2,195)
(Recovery of) provision for credit losses |  | 0 | 0
Net interest income after provision for credit losses |  | (2,414) | (2,195)
NONINTEREST INCOME |  |  |
Fair value adjustments of other equity investments |  | (8,152) | (110)
Residential mortgage banking income |  | 0 | 0
Mortgage servicing rights |  | 0 | 0
Loss on sale of mortgage servicing rights |  | 0 |
Other |  | (178) | (1,585)
Total noninterest income |  | (8,330) | (1,695)
NONINTEREST EXPENSE |  |  |
Salaries and employee benefits |  | 0 | 0
Occupancy |  | 0 | 0
Technology and communication |  | 0 | 0
Regulatory remediation |  | 0 | 0
Other |  | 1,385 | 3,433
Goodwill impairment |  |  | 0
ESOP litigation |  |  | 6,000
Total noninterest expenses |  | 1,385 | 9,433
Loss before income taxes |  | (12,129) | (13,323)
Income tax benefit |  | (2,686) | (2,623)
Discontinued Operations |  |  |
Net loss |  | (9,443) | (10,700)
Total assets |  | 363,296 | 233,506
Eliminations [Member] |  |  |
INTEREST INCOME |  |  |
Interest income |  | 0 | 0
Interest expense |  | 0 | 0
Net interest income |  | 0 | 0
(Recovery of) provision for credit losses |  | 0 | 0
Net interest income after provision for credit losses |  | 0 | 0
NONINTEREST INCOME |  |  |
Fair value adjustments of other equity investments |  | 0 | 0
Residential mortgage banking income |  | 0 | 0
Mortgage servicing rights |  | 0 | 0
Loss on sale of mortgage servicing rights |  | 0 |
Other |  | (384) | (396)
Total noninterest income |  | (384) | (396)
NONINTEREST EXPENSE |  |  |
Salaries and employee benefits |  | 0 | 0
Occupancy |  | 0 | 0
Technology and communication |  | 0 | 0
Regulatory remediation |  | 0 | 0
Other |  | (384) | (396)
Goodwill impairment |  |  | 0
ESOP litigation |  |  | 0
Total noninterest expenses |  | (384) | (396)
Loss before income taxes |  | 0 | 0
Income tax benefit |  | 0 | 0
Discontinued Operations |  |  |
Net loss |  | 0 | 0
Total assets |  | $ (358,709) | $ (208,415)

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