Loans - Amortized Cost of Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans and Allowance for Credit Losses
Total Loans	$ 6,561,178	$ 6,652,307
Real Estate
Loans and Allowance for Credit Losses
Total Loans	44,057	38,150
Business Assets
Loans and Allowance for Credit Losses
Total Loans	8,246	5,392
Multi-family residential
Loans and Allowance for Credit Losses
Total Loans	2,392,901	2,388,150
Multi-family residential \| Real Estate
Loans and Allowance for Credit Losses
Total Loans	14,312	11,558
Commercial real estate
Loans and Allowance for Credit Losses
Total Loans	1,933,961	1,995,152
Commercial real estate \| Real Estate
Loans and Allowance for Credit Losses
Total Loans	18,705	22,344
One-to-four family - mixed- use property
Loans and Allowance for Credit Losses
Total Loans	468,903	478,810
One-to-four family - mixed- use property \| Real Estate
Loans and Allowance for Credit Losses
Total Loans		237
One-to-four family - residential
Loans and Allowance for Credit Losses
Total Loans	298,654	320,285
One-to-four family - residential \| Real Estate
Loans and Allowance for Credit Losses
Total Loans	1,074	1,224
Small Business Administration
Loans and Allowance for Credit Losses
Total Loans	22,200	17,747
Small Business Administration \| Business Assets
Loans and Allowance for Credit Losses
Total Loans	1,074	558
Commercial business and other
Loans and Allowance for Credit Losses
Total Loans	1,404,082	1,397,415
Commercial business and other \| Real Estate
Loans and Allowance for Credit Losses
Total Loans	9,966	2,787
Commercial business and other \| Business Assets
Loans and Allowance for Credit Losses
Total Loans	$ 7,172	$ 4,834