Loans Receivable Held for Investment, Activity in Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	$ 4,388	[1]	$ 3,391
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	88		148
Ending balance	6,285	[1]	3,539
Real Estate [Member] | Single Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	109		145
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	(62)		12
Ending balance	261		157
Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	3,273		2,657
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	56		114
Ending balance	3,932		2,771
Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	449		236
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	97		(20)
Ending balance	1,012		216
Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	65		103
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	(10)		(40)
Ending balance	92		63
Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	313		212
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	61		25
Ending balance	593		237
Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	175		23
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	(72)		57
Ending balance	357		80
SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	0
Charge-offs	0
Recoveries	0
Provision (benefit)	18
Ending balance	38
Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	4		15
Charge-offs	0		0
Recoveries	0		0
Provision (benefit)	0		0
Ending balance	0		$ 15
ASU 2016-13 [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	6,197
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	1,809
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Single Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	214
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	603
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	466
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	37
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	219
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	254
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	20
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance	$ (4)

[1] The allowance for credit losses as of December 31, 2022 was accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the date of the consolidated statement of financial condition. Effective January 1, 2023, the allowance for credit losses is accounted for under ASC 326, which is reflective of estimated expected lifetime credit losses.