Loans Held for Sale - Delinquent and Non-performing Loans Sold During the Period Indicated (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Nonperforming Financial Instruments [Member]
Loans sold | loan	13	7	33
Proceeds	$ 7,042	$ 6,863	$ 28,632
Net Charge-offs	(8)	0	(121)
Net gain	$ 108	$ 119	$ 335
Nonperforming Financial Instruments [Member] | Multi-family Residential Portfolio Segment [Member]
Loans sold | loan	7	2	13
Proceeds	$ 3,622	$ 646	$ 14,269
Net Charge-offs	0	0	(43)
Net gain	$ 69	$ 14	$ 112
Nonperforming Financial Instruments [Member] | Commercial Real Estate [Member]
Loans sold | loan	3	3	4
Proceeds	$ 1,867	$ 5,690	$ 7,380
Net Charge-offs	(8)	0	(64)
Net gain	$ 0	$ 100	$ 104
Nonperforming Financial Instruments [Member] | One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans sold | loan	3	2	16
Proceeds	$ 1,553	$ 527	$ 6,983
Net Charge-offs	0	0	(14)
Net gain	$ 39	$ 5	$ 119
Performing Financial Instruments [Member]
Loans sold | loan	2	6
Proceeds	$ 2,000	$ 25,130
Net Charge-offs	0	0
Net gain	$ 0	$ 0
Performing Financial Instruments [Member] | Multi-family Residential Portfolio Segment [Member]
Loans sold | loan		5
Proceeds		$ 20,818
Net Charge-offs		0
Net gain		$ 0
Performing Financial Instruments [Member] | Commercial Real Estate [Member]
Loans sold | loan	2	1
Proceeds	$ 2,000	$ 4,312
Net Charge-offs	0	0
Net gain	$ 0	$ 0