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Loans - Amortized Cost of Collateral (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 6,904,176 |
Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 12,021 | $ 11,652
Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 8,934 | 18,290
Multi-family Residential Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,604,174 |
Multi-family Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 3,975 | 3,547
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,905,707 |
Commercial Real Estate [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total |  | 254
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 551,971 |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 797 | 1,045
One-To-Four Family - Residential Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 239,585 |
One-To-Four Family - Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 4,396 | 3,953
Construction Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 60,373 |
Small Business Administration Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 22,760 |
Small Business Administration Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 949 | 950
Commercial Business and Other Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,853 | 2,853
Commercial Business and Other Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 7,985 | $ 17,340

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