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Premises and Equipment (Details) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 item | Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($)
Premises and equipment |  |  |
Cost |  | $ 161,545 | $ 115,865
Accumulated Depreciation/Amortization |  | 73,540 | 70,388
Net Book Value |  | 88,005 | 45,477
Impairment charges |  | $ 3,800 |
Number of premises and equipment held for sale | item | 13 | 4 |
West Suburban Bancorp, Inc |  |  |
Premises and equipment |  |  |
Increase in premises and equipment due to acquisition |  | $ 42,500 |
Land |  |  |
Premises and equipment |  |  |
Cost |  | 42,375 | 18,501
Net Book Value |  | 42,375 | 18,501
Buildings |  |  |
Premises and equipment |  |  |
Cost |  | 59,313 | 43,579
Accumulated Depreciation/Amortization |  | 26,959 | 25,909
Net Book Value |  | 32,354 | 17,670
Leasehold Improvements |  |  |
Premises and equipment |  |  |
Cost |  | 2,324 | 2,324
Accumulated Depreciation/Amortization |  | 1,004 | 699
Net Book Value |  | 1,320 | 1,625
Furniture and Fixtures |  |  |
Premises and equipment |  |  |
Cost |  | 57,533 | 51,461
Accumulated Depreciation/Amortization |  | 45,577 | 43,780
Net Book Value |  | $ 11,956 | $ 7,681

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