Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Impaired Loans
Unpaid Principal Balance	$ 17,210,000			$ 17,210,000		$ 17,440,000
Total impaired loans	15,009,000			15,009,000		12,458,000
With Specific Allowance	0			0		1,038,000
Without Specific Allowance	15,009,000			15,009,000		11,420,000
Specific Allowance for Impaired Loans	0		$ 250,000	0	$ 250,000	584,000
Average Recorded Investment	15,296,000	$ 18,575,000	6,456,000	17,219,000	7,234,000
Interest Income Recognized	104,000	109,000	0	303,000	0
Business loans \| Commercial and industrial
Impaired Loans
Unpaid Principal Balance	3,099,000			3,099,000		1,071,000
Total impaired loans	2,950,000			2,950,000		1,023,000
With Specific Allowance	0			0		550,000
Without Specific Allowance	2,950,000			2,950,000		473,000
Specific Allowance for Impaired Loans	0		0	0	0	118,000
Average Recorded Investment	3,078,000	2,614,000	1,030,000	2,565,000	1,161,000
Interest Income Recognized	0	0	0	0	0
Business loans \| Franchise
Impaired Loans
Unpaid Principal Balance	697,000			697,000		190,000
Total impaired loans	16,000			16,000		189,000
With Specific Allowance	0			0		0
Without Specific Allowance	16,000			16,000		189,000
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	679,000	4,047,000	209,000	2,901,000	93,000
Interest Income Recognized	0	0	0	0	0
Business loans \| Commercial owner occupied
Impaired Loans
Unpaid Principal Balance	1,427,000			1,427,000		628,000
Total impaired loans	1,406,000			1,406,000		599,000
With Specific Allowance	0			0		0
Without Specific Allowance	1,406,000			1,406,000		599,000
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	845,000	564,000	0	662,000	1,931,000
Interest Income Recognized	0	0	0	0	0
Business loans \| SBA
Impaired Loans
Unpaid Principal Balance	3,320,000			3,320,000		7,598,000
Total impaired loans	2,586,000			2,586,000		2,739,000
With Specific Allowance	0			0		488,000
Without Specific Allowance	2,586,000			2,586,000		2,251,000
Specific Allowance for Impaired Loans	0		250,000	0	250,000	466,000
Average Recorded Investment	2,488,000	3,139,000	1,914,000	7,360,000	1,505,000
Interest Income Recognized	0	0	0	303,000	0
Business loans \| Agribusiness
Impaired Loans
Unpaid Principal Balance	6,903,000			6,903,000		7,500,000
Total impaired loans	6,903,000			6,903,000		7,500,000
With Specific Allowance	0			0		0
Without Specific Allowance	6,903,000			6,903,000		7,500,000
Specific Allowance for Impaired Loans	0		0	0	0	0
Average Recorded Investment	7,092,000	7,489,000	0	2,969,000	0
Interest Income Recognized	104,000	109,000	0	0	0
Real estate loans \| Commercial non-owner occupied
Impaired Loans
Unpaid Principal Balance	1,351,000			1,351,000
Total impaired loans	777,000			777,000
With Specific Allowance	0			0
Without Specific Allowance	777,000			777,000
Specific Allowance for Impaired Loans	0		0	0	0
Average Recorded Investment	421,000	162,000	1,290,000	194,000	573,000
Interest Income Recognized	0	0	0	0	0
Real estate loans \| Multi-family
Impaired Loans
Specific Allowance for Impaired Loans	0		0	0	0
Average Recorded Investment	0	0	589,000	0	666,000
Interest Income Recognized	0	0	0	0	0
Real estate loans \| One-to-four family
Impaired Loans
Unpaid Principal Balance	413,000			413,000		453,000
Total impaired loans	371,000			371,000		408,000
With Specific Allowance	0			0		0
Without Specific Allowance	371,000			371,000		408,000
Specific Allowance for Impaired Loans	0		0	0	0	$ 0
Average Recorded Investment	373,000	383,000	1,406,000	383,000	1,258,000
Interest Income Recognized	0	0	0	0	0
Real estate loans \| Land
Impaired Loans
Specific Allowance for Impaired Loans	0		0	0	0
Average Recorded Investment	320,000	160,000	5,000	160,000	6,000
Interest Income Recognized	0	0	0	0	0
Consumer loans \| Consumer loans
Impaired Loans
Specific Allowance for Impaired Loans	0		0	0	0
Average Recorded Investment	0	17,000	13,000	25,000	41,000
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0	$ 0

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

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-Publisher FASB
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-SubTopic 10
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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