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Loans - Composition of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
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Loans: |  |
Net unamortized premiums and unearned loan fees | $ 10,891 | $ 10,097
Total loans, net of fees and costs excluding portfolio layer basis adjustments | 6,742,067 | 6,747,873
Unallocated portfolio layer basis adjustments | (232) | (2,025)
Total loans, net of fees and costs | 6,741,835 | 6,745,848
Multi-family residential |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 2,531,628 | 2,527,222
Commercial real estate |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 1,953,710 | 1,973,124
One-to-four family - mixed- use property |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 501,562 | 511,222
One-to-four family - residential |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 269,492 | 244,282
Construction |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 63,474 | 60,399
Total loans, net of fees and costs excluding portfolio layer basis adjustments | 63,234 | 60,114
Small Business Administration |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | 14,713 | 19,925
Commercial business and other |  |
Loans: |  |
Loans before allowance for credit losses, fee and costs | $ 1,396,597 | $ 1,401,602

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