Loans Receivable Held for Investment, Allowance for Loan Losses and Recorded Investment in Loans by Type of Loans and Based on Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2023		Dec. 31, 2022		Mar. 31, 2022	Dec. 31, 2021
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			$ 7
Collectively evaluated for impairment			4,381
Total ending allowance balance	$ 6,285	[1]	4,388	[1]	$ 3,539	$ 3,391
Loans [Abstract]
Loans individually evaluated for impairment			1,712
Loans collectively evaluated for impairment			624,468
Subtotal			626,180
Loans acquired in the merger			147,264
Gross loans receivable	783,348		773,444
Real Estate [Member] | Single Family [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			3
Collectively evaluated for impairment			106
Total ending allowance balance	261		109		157	145
Loans [Abstract]
Loans individually evaluated for impairment			57
Loans collectively evaluated for impairment			20,893
Subtotal			20,950
Loans acquired in the merger			9,088
Gross loans receivable	29,216		30,038
Real Estate [Member] | Multi-Family [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			0
Collectively evaluated for impairment			3,273
Total ending allowance balance	3,932		3,273		2,771	2,657
Loans [Abstract]
Loans individually evaluated for impairment			0
Loans collectively evaluated for impairment			462,539
Subtotal			462,539
Loans acquired in the merger			41,357
Gross loans receivable	511,046		503,896
Real Estate [Member] | Commercial Real Estate [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			0
Collectively evaluated for impairment			449
Total ending allowance balance	1,012		449		216	236
Loans [Abstract]
Loans individually evaluated for impairment			0
Loans collectively evaluated for impairment			63,929
Subtotal			63,929
Loans acquired in the merger			50,645
Gross loans receivable	129,031		114,574
Real Estate [Member] | Church [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			4
Collectively evaluated for impairment			61
Total ending allowance balance	92		65		63	103
Loans [Abstract]
Loans individually evaluated for impairment			1,655
Loans collectively evaluated for impairment			9,008
Subtotal			10,663
Loans acquired in the merger			5,117
Gross loans receivable	13,983		15,780
Real Estate [Member] | Construction [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			0
Collectively evaluated for impairment			313
Total ending allowance balance	593		313		237	212
Loans [Abstract]
Loans individually evaluated for impairment			0
Loans collectively evaluated for impairment			38,530
Subtotal			38,530
Loans acquired in the merger			2,173
Gross loans receivable	59,143		40,703
Commercial - Other [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			0
Collectively evaluated for impairment			175
Total ending allowance balance	357		175		80	23
Loans [Abstract]
Loans individually evaluated for impairment			0
Loans collectively evaluated for impairment			29,558
Subtotal			29,558
Loans acquired in the merger			38,884
Gross loans receivable			68,442
Consumer [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment			0
Collectively evaluated for impairment			4
Total ending allowance balance	0		4		$ 15	$ 15
Loans [Abstract]
Loans individually evaluated for impairment			0
Loans collectively evaluated for impairment			11
Subtotal			11
Loans acquired in the merger			0
Gross loans receivable	$ 10		$ 11

[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.