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Loans - Amortized Cost of Collateral (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | $ 6,816,144 | $ 6,907,899
Basis adjustments | (2,184) | 949
Portfolio Layer Hedges on Closed Portfolio of Loans [Member] | Designated as Hedging Instrument [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Basis adjustments | 2,200 | 900
Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 21,913 | 9,315
Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 12,796 | 14,344
Multi-family Residential Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 2,642,841 | 2,662,226
Multi-family Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 10,047 | 3,640
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 1,930,377 | 1,959,624
Commercial Real Estate [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 6,722 |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 518,304 | 533,084
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 371 | 1,005
One-To-Four Family - Residential Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 252,406 | 221,519
One-To-Four Family - Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 889 | 4,670
Construction Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 63,318 | 58,261
Small Business Administration Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 19,615 | 20,345
Small Business Administration Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 2,532 | 2,576
Commercial Business and Other Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 1,389,283 | 1,452,840
Commercial Business and Other Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | 3,884 |
Commercial Business and Other Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | $ 10,264 | $ 11,768

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