3. Loans, Impaired (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Impaired loans
Unpaid Contractual Principal Balance	$ 23,405		$ 24,126
Recorded Investment With No Allowance	481		511
Recorded Investment With Allowance	21,608		22,282
Recorded Investment in Impaired Loans	22,089		22,793
Related Allowance	1,077		1,098
Average Outstanding Impaired Loans	22,441		23,621
Interest Income Recognized	342	$ 352	1,342
Construction and land development
Impaired loans
Unpaid Contractual Principal Balance	275		281
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	275		279
Recorded Investment in Impaired Loans	275		279
Related Allowance	5		5
Average Outstanding Impaired Loans	277		327
Interest Income Recognized	4		19
Single-family residential
Impaired loans
Unpaid Contractual Principal Balance	4,596		5,059
Recorded Investment With No Allowance	418		422
Recorded Investment With Allowance	3,711		4,188
Recorded Investment in Impaired Loans	4,129		4,610
Related Allowance	30		32
Average Outstanding Impaired Loans	5,090		6,271
Interest Income Recognized	61		261
Single-family residential - Banco de la Gente stated income
Impaired loans
Unpaid Contractual Principal Balance	16,399		16,424
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	15,719		15,776
Recorded Investment in Impaired Loans	15,719		15,776
Related Allowance	1,026		1,042
Average Outstanding Impaired Loans	15,027		14,619
Interest Income Recognized	252		944
Commercial
Impaired loans
Unpaid Contractual Principal Balance	1,754		1,995
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	1,749		1,925
Recorded Investment in Impaired Loans	1,749		1,925
Related Allowance	1		17
Average Outstanding Impaired Loans	1,837		2,171
Interest Income Recognized	23		111
Multifamily and Farmland
Impaired loans
Unpaid Contractual Principal Balance	0		0
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	0		0
Recorded Investment in Impaired Loans	0		0
Related Allowance	13		0
Average Outstanding Impaired Loans	0		0
Interest Income Recognized	0		0
Total real estate loans
Impaired loans
Unpaid Contractual Principal Balance	23,024		23,759
Recorded Investment With No Allowance	418		422
Recorded Investment With Allowance	21,454		22,168
Recorded Investment in Impaired Loans	21,872		22,590
Related Allowance	1,075		1,096
Average Outstanding Impaired Loans	22,231		23,388
Interest Income Recognized	340		1,335
Commercial loans (not secured by real estate)
Impaired loans
Unpaid Contractual Principal Balance	270		251
Recorded Investment With No Allowance	63		89
Recorded Investment With Allowance	47		1
Recorded Investment in Impaired Loans	110		90
Related Allowance	0		0
Average Outstanding Impaired Loans	100		96
Interest Income Recognized	1		0
Consumer loans (not secured by real estate)
Impaired loans
Unpaid Contractual Principal Balance	111		116
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	107		113
Recorded Investment in Impaired Loans	107		113
Related Allowance	2		2
Average Outstanding Impaired Loans	110		137
Interest Income Recognized	$ 1		$ 7

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
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