Loans - Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 38,729	$ 37,433	$ 40,442	$ 37,135
Charge-offs	(1,731)	(50)	(11,029)	(1,086)
Recoveries	171	551	235	652
Provision (benefit)	1,424	1,490	8,945	2,723
Ending balance	38,593	39,424	38,593	39,424
Multi-family Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	9,041	8,561	9,552	8,185
Recoveries		1	1	1
Provision (benefit)	677	843	165	1,219
Ending balance	9,718	9,405	9,718	9,405
Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	7,671	7,716	8,184	7,158
Charge-offs	(8)		(8)
Provision (benefit)	543	727	30	1,285
Ending balance	8,206	8,443	8,206	8,443
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,710	1,864	1,875	1,755
Provision (benefit)	(95)	95	(260)	204
Ending balance	1,615	1,959	1,615	1,959
One-To-Four Family - Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	727	766	901	784
Charge-offs	(6)		(12)
Recoveries	2	2	44	4
Provision (benefit)	(69)	98	(279)	78
Ending balance	654	866	654	866
Construction Portfolio Segment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	152	268	261	186
Provision (benefit)	(20)	32	(129)	114
Ending balance	132	300	132	300
Small Business Administration Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,169	1,837	2,198	1,209
Charge-offs	(1)	(26)	(7)	(1,054)
Recoveries	159	14	171	27
Provision (benefit)	(165)	293	(200)	1,936
Ending balance	2,162	2,118	2,162	2,118
Taxi Medallion Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Recoveries		435		447
Provision (benefit)		(435)		(447)
Commercial Business and Other Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	17,259	16,421	17,471	17,858
Charge-offs	(1,716)	(24)	(11,002)	(32)
Recoveries	10	99	19	173
Provision (benefit)	553	(163)	9,618	(1,666)
Ending balance	$ 16,106	$ 16,333	$ 16,106	$ 16,333