Loans - Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 38,593	$ 39,424	$ 40,442	$ 37,135
Charge-offs	(21)	(324)	(11,050)	(1,410)
Recoveries	63	34	298	686
Provision (benefit)	593	2,134	9,538	4,857
Ending balance	39,228	41,268	39,228	41,268
Multi-family Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	9,718	9,405	9,552	8,185
Recoveries			1	1
Provision (benefit)	917	355	1,082	1,574
Ending balance	10,635	9,760	10,635	9,760
Commercial Real Estate [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	8,206	8,443	8,184	7,158
Charge-offs			(8)
Provision (benefit)	562	(29)	592	1,256
Ending balance	8,768	8,414	8,768	8,414
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,615	1,959	1,875	1,755
Provision (benefit)	10	3	(250)	207
Ending balance	1,625	1,962	1,625	1,962
One-To-Four Family - Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	654	866	901	784
Charge-offs		(2)	(12)	(2)
Recoveries	6		50	4
Provision (benefit)	57	(59)	(222)	19
Ending balance	717	805	717	805
Construction Portfolio Segment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	132	300	261	186
Provision (benefit)	32	(44)	(97)	70
Ending balance	164	256	164	256
Small Business Administration Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,162	2,118	2,198	1,209
Charge-offs			(7)	(1,054)
Recoveries	48	12	219	39
Provision (benefit)	(194)	(68)	(394)	1,868
Ending balance	2,016	2,062	2,016	2,062
Taxi Medallion Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Recoveries				447
Provision (benefit)				(447)
Commercial Business and Other Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	16,106	16,333	17,471	17,858
Charge-offs	(21)	(322)	(11,023)	(354)
Recoveries	9	22	28	195
Provision (benefit)	(791)	1,976	8,827	310
Ending balance	$ 15,303	$ 18,009	$ 15,303	$ 18,009