Loans and Allowance for Credit Losses- Amortized Cost of Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 6,907,899	$ 6,934,769
Basis adjustments	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	900
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	9,315	11,652
Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	14,344	18,290
Multi-family Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,662,226	2,605,172
Multi-family Residential Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,640	3,547
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,959,624	1,914,898
Commercial Real Estate [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		254
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	533,084	557,295
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,005	1,045
One-To-Four Family - Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	221,519	242,480
One-To-Four Family - Residential Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	4,670	3,953
Construction Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	58,261	70,824
Small Business Administration Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	20,345	23,193
Small Business Administration Portfolio Segment [Member] | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,576	950
Commercial Business and Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,452,840	1,520,907
Commercial Business and Other Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		2,853
Commercial Business and Other Portfolio Segment [Member] | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 11,768	$ 17,340