Loans and Allowance for Credit Losses - Non-Accrual at Amortized Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	$ 29,942	$ 15,254
Non-accrual amortized cost end of the reporting period	23,659	29,942
Non-accrual with no related allowance	15,133	13,040
Interest income recognized	25	171
Loans ninety days or more past due and still accruing	1,463	2,600
Multi-family Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	3,547	2,652
Non-accrual amortized cost end of the reporting period	3,640	3,547
Non-accrual with no related allowance	3,640	3,547
Interest income recognized	2
Loans ninety days or more past due and still accruing	1,463
Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	254	640
Non-accrual amortized cost end of the reporting period		254
Non-accrual with no related allowance		254
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	1,045	1,582
Non-accrual amortized cost end of the reporting period	1,005	1,045
Non-accrual with no related allowance	1,005	1,045
Interest income recognized	3
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Performing Financial Instruments [Member]
Non-accrual loans		300
One-To-Four Family - Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	3,953	7,483
Non-accrual amortized cost end of the reporting period	4,670	3,953
Non-accrual with no related allowance	4,670	3,953
Interest income recognized	3
Small Business Administration Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	950	952
Non-accrual amortized cost end of the reporting period	2,576	950
Non-accrual with no related allowance	2,576	950
Taxi Medallion Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Loans ninety days or more past due and still accruing		2,600
Commercial Business and Other Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Non-accrual amortized cost beginning of the reporting period	20,193	1,945
Non-accrual amortized cost end of the reporting period	11,768	20,193
Non-accrual with no related allowance	3,242	3,291
Interest income recognized	$ 17	171
Commercial Business and Other Portfolio Segment [Member] | Performing Financial Instruments [Member]
Non-accrual loans		$ 100