Loans Held for Sale - Delinquent and Non-performing Loans Sold During the Period Indicated (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Nonperforming Financial Instruments [Member]
Loans sold | loan	33	2	11
Proceeds	$ 28,632	$ 580	$ 13,048
Net Recoveries (Charge-offs)	(121)	0	(1)
Net gain	$ 335	$ 42	$ 756
Nonperforming Financial Instruments [Member] | Multi-family Residential Portfolio Segment [Member]
Loans sold | loan	13	1	5
Proceeds	$ 14,269	$ 284	$ 2,115
Net Recoveries (Charge-offs)	(43)	0	0
Net gain	$ 112	$ 42	$ 367
Nonperforming Financial Instruments [Member] | Commercial Real Estate
Loans sold | loan	4		2
Proceeds	$ 7,380		$ 6,800
Net Recoveries (Charge-offs)	(64)		0
Net gain	$ 104		$ 383
Nonperforming Financial Instruments [Member] | One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans sold | loan	16	1	3
Proceeds	$ 6,983	$ 296	$ 885
Net Recoveries (Charge-offs)	(14)	0	(1)
Net gain	$ 119	$ 0	$ 6
Nonperforming Financial Instruments [Member] | One-To-Four Family - Residential Portfolio Segment [Member]
Loans sold | loan			1
Proceeds			$ 3,248
Net Recoveries (Charge-offs)			0
Net gain			$ 0
Performing Financial Instruments [Member]
Loans sold | loan		2	3
Proceeds		$ 6,913	$ 2,069
Net Recoveries (Charge-offs)		0	0
Net gain		$ 6	$ 114
Performing Financial Instruments [Member] | Commercial Business and Other Portfolio Segment [Member]
Loans sold | loan		1
Proceeds		$ 6,139
Net Recoveries (Charge-offs)		0
Net gain		$ (62)
Performing Financial Instruments [Member] | Small Business Administration Portfolio Segment [Member]
Loans sold | loan		1	3
Proceeds		$ 774	$ 2,069
Net Recoveries (Charge-offs)		0	0
Net gain		$ 68	$ 114