3. Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Allowance for loan losses
Beginning balance	$ 6,373	$ 7,263	$ 6,366	$ 7,550
Charge-offs	(401)	(198)	(507)	(329)
Recoveries	74	53	156	133
Provision	231	49	262	(187)
Ending balance	6,277	7,167	6,277	7,167
Ending balance: individually evaluated for impairments	1,086	1,195	1,086	1,195
Ending balance: collectively evaluated for impairments	5,191	5,972	5,191	5,972
Ending balance	6,277	7,167	6,277	7,167
Loans
Ending balance	781,884	745,038	781,884	745,038
Ending balance: individually evaluated for impairment	19,399	21,898	19,399	21,898
Ending balance: collectively evaluated for impairment	762,485	723,140	762,485	723,140
Construction and land development
Allowance for loan losses
Beginning balance	651	969	804	1,152
Charge-offs	0	0	0	0
Recoveries	1	3	3	10
Provision	16	211	(139)	21
Ending balance	668	1,183	668	1,183
Ending balance: individually evaluated for impairments	0	0	0	0
Ending balance: collectively evaluated for impairments	668	1,183	668	1,183
Ending balance	668	1,183	668	1,183
Loans
Ending balance	79,769	71,213	79,769	71,213
Ending balance: individually evaluated for impairment	95	0	95	0
Ending balance: collectively evaluated for impairment	79,674	71,213	79,674	71,213
Single-family residential
Allowance for loan losses
Beginning balance	1,640	2,003	1,812	2,126
Charge-offs	(43)	(24)	(43)	(44)
Recoveries	22	9	27	16
Provision	19	(169)	(158)	(279)
Ending balance	1,638	1,819	1,638	1,819
Ending balance: individually evaluated for impairments	2	0	2	0
Ending balance: collectively evaluated for impairments	1,636	1,819	1,636	1,819
Ending balance	1,638	1,819	1,638	1,819
Loans
Ending balance	250,620	240,993	250,620	240,993
Ending balance: individually evaluated for impairment	2,132	1,152	2,132	1,152
Ending balance: collectively evaluated for impairment	248,488	239,841	248,488	239,841
Single-family residential - Banco de la Gente stated income
Allowance for loan losses
Beginning balance	1,265	1,328	1,280	1,377
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(32)	(35)	(47)	(84)
Ending balance	1,233	1,293	1,233	1,293
Ending balance: individually evaluated for impairments	1,066	1,103	1,066	1,103
Ending balance: collectively evaluated for impairments	167	190	167	190
Ending balance	1,233	1,293	1,233	1,293
Loans
Ending balance	35,847	38,875	35,847	38,875
Ending balance: individually evaluated for impairment	14,975	16,792	14,975	16,792
Ending balance: collectively evaluated for impairment	20,872	22,083	20,872	22,083
Commercial
Allowance for loan losses
Beginning balance	1,298	1,655	1,193	1,593
Charge-offs	(271)	0	(271)	(66)
Recoveries	4	6	7	14
Provision	389	(198)	491	(78)
Ending balance	1,420	1,463	1,420	1,463
Ending balance: individually evaluated for impairments	18	65	18	65
Ending balance: collectively evaluated for impairments	1,402	1,398	1,402	1,398
Ending balance	1,420	1,463	1,420	1,463
Loans
Ending balance	269,792	243,957	269,792	243,957
Ending balance: individually evaluated for impairment	2,103	3,724	2,103	3,724
Ending balance: collectively evaluated for impairment	267,689	240,233	267,689	240,233
Multifamily and Farmland
Allowance for loan losses
Beginning balance	73	73	72	52
Charge-offs	0	(66)	(5)	0
Recoveries	0	0	1	0
Provision	(1)	68	4	23
Ending balance	72	75	72	75
Ending balance: individually evaluated for impairments	0	0	0	0
Ending balance: collectively evaluated for impairments	72	75	72	75
Ending balance	72	75	72	75
Loans
Ending balance	28,667	30,125	28,667	30,125
Ending balance: individually evaluated for impairment	0	0	0	0
Ending balance: collectively evaluated for impairment	28,667	30,125	28,667	30,125
Commercial loans (not secured by real estate)
Allowance for loan losses
Beginning balance	706	628	574	675
Charge-offs	(2)	(35)	(2)	(37)
Recoveries	8	7	16	15
Provision	(125)	104	(1)	51
Ending balance	587	704	587	704
Ending balance: individually evaluated for impairments	0	27	0	27
Ending balance: collectively evaluated for impairments	587	677	587	677
Ending balance	587	704	587	704
Loans
Ending balance	93,580	94,567	93,580	94,567
Ending balance: individually evaluated for impairment	94	230	94	230
Ending balance: collectively evaluated for impairment	93,486	94,337	93,486	94,337
Farm loans (not secured by real estate)
Allowance for loan losses
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	0	0	0
Ending balance	0	0	0	0
Ending balance: individually evaluated for impairments	0	0	0	0
Ending balance: collectively evaluated for impairments	0	0	0	0
Ending balance	0	0	0	0
Loans
Ending balance	1,023	1,591	1,023	1,591
Ending balance: individually evaluated for impairment	0	0	0	0
Ending balance: collectively evaluated for impairment	1,023	1,591	1,023	1,591
Consumer And All Other Loans
Allowance for loan losses
Beginning balance	136	178	155	204
Charge-offs	(85)	(73)	(186)	(182)
Recoveries	39	28	102	78
Provision	60	25	79	58
Ending balance	150	158	150	158
Ending balance: individually evaluated for impairments	0	0	0	0
Ending balance: collectively evaluated for impairments	150	158	150	158
Ending balance	150	158	150	158
Loans
Ending balance	22,586	23,717	22,586	23,717
Ending balance: individually evaluated for impairment	0	0	0	0
Ending balance: collectively evaluated for impairment	22,586	23,717	22,586	23,717
Unallocated
Allowance for loan losses
Beginning balance	604	429	476	371
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(95)	43	33	101
Ending balance	509	472	509	472
Ending balance: individually evaluated for impairments	0	0	0	0
Ending balance: collectively evaluated for impairments	509	472	509	472
Ending balance	509	472	509	472
Loans
Ending balance	0	0	0	0
Ending balance: individually evaluated for impairment	0	0	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0	$ 0	$ 0

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Loans Receivable [Abstract]

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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