Loans and Allowance for Credit Losses - Amortized Cost of Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 6,934,769
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,652	$ 12,874
Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18,290	2,379
Multi-family Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,605,172
Multi-family Residential Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,547	2,652
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,914,898
Commercial Real Estate [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	254	1,158
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	557,295
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,045	1,582
One-To-Four Family - Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	242,480
One-To-Four Family - Residential Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,953	7,482
Construction Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	70,824
Small Business Administration Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	23,193
Small Business Administration Portfolio Segment [Member] | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	950	952
Commercial Business and Other Portfolio Segment [Member] | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,853
Commercial Business and Other Portfolio Segment [Member] | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 17,340	$ 1,427