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Summary of Significant Accounting Policies - Narrative (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) store loan | Dec. 31, 2020 USD ($) loan | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |
Number of loans modified in TDR | loan | 0 | 2 |  |
Net loans | $ 6,990,633,000 | $ 7,650,633,000 |  |
Intangible assets | 0 | 0 |  |
Unamortized multifamily FHA MSR's | $ 1,500,000 | 807,000 |  |
Reasonable and Supportable period (in years) | 18 months |  |  |
Historical loss rate period | 12 months |  |  |
Less: allowance for credit losses | $ (74,965,000) | (109,579,000) | $ (73,658,000) | $ (73,658,000)
Liabilities: Reserve for Unfunded Commitments | $ (4,379,000) | $ (5,498,000) | $ 0 |
Minimum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Days from commitment to closing | 30 days |  |  |
Maximum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Days from commitment to closing | 90 days |  |  |
Furniture Fixtures and Equipment | Minimum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 3 years |  |  |
Furniture Fixtures and Equipment | Maximum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 7 years |  |  |
Computer Software and Hardware | Minimum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 3 years |  |  |
Computer Software and Hardware | Maximum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 5 years |  |  |
Building Improvements | Minimum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 5 years |  |  |
Building Improvements | Maximum |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, plant and equipment, useful life | 20 years |  |  |
Banking Services |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Number of stores | store | 17 |  |  |
Lending Services |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Number of stores | store | 5 |  |  |

X
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