Loans (Details 6) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	$ 9,851	$ 15,352
Interest Income Recognized	404	661
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	7,496	9,351
Interest Income Recognized	212	319
Total [Abstract]
Average Recorded Investment	17,348	24,703
Interest Income Recognized	616	980
Construction and Land Development [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	87	1,830
Interest Income Recognized	40	95
Total [Abstract]
Average Recorded Investment	1,206	2,674
Interest Income Recognized	65	118
Residential [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	0	61
Interest Income Recognized	0	0
Total [Abstract]
Average Recorded Investment	0	61
Interest Income Recognized	0	0
Commercial [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	87	1,769
Interest Income Recognized	40	95
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	1,118	844
Interest Income Recognized	25	23
Total [Abstract]
Average Recorded Investment	1,206	2,613
Interest Income Recognized	65	118
Commercial Real Estate [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	3,541	5,784
Interest Income Recognized	135	190
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	4,557	6,457
Interest Income Recognized	174	250
Total [Abstract]
Average Recorded Investment	8,098	12,241
Interest Income Recognized	309	440
Owner Occupied [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	1,040	1,349
Interest Income Recognized	29	69
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	4,511	6,088
Interest Income Recognized	162	226
Total [Abstract]
Average Recorded Investment	5,551	7,437
Interest Income Recognized	191	295
Non-Owner Occupied [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	2,501	4,435
Interest Income Recognized	106	121
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	46	369
Interest Income Recognized	12	24
Total [Abstract]
Average Recorded Investment	2,547	4,804
Interest Income Recognized	118	145
Multifamily [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total [Abstract]
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Farmland [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Total [Abstract]
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Home equity lines [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	1,030	890
Interest Income Recognized	10	51
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	0	22
Interest Income Recognized	0	0
Total [Abstract]
Average Recorded Investment	1,030	912
Interest Income Recognized	10	51
Consumer Real Estate, Secured by 1-4 Family Residential [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	5,802	7,385
Interest Income Recognized	198	331
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	1,755	1,733
Interest Income Recognized	13	41
Total [Abstract]
Average Recorded Investment	7,557	9,118
Interest Income Recognized	211	372
First Deed of Trust [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	4,019	5,374
Interest Income Recognized	145	233
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	1,624	1,434
Interest Income Recognized	9	26
Total [Abstract]
Average Recorded Investment	5,643	6,808
Interest Income Recognized	154	259
Second Deed of Trust [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	753	1,121
Interest Income Recognized	43	47
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	131	277
Interest Income Recognized	4	15
Total [Abstract]
Average Recorded Investment	884	1,398
Interest Income Recognized	47	62
Commercial and industrial loans (except those secured by real estate) [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	421	344
Interest Income Recognized	31	44
Impaired Loans With Related Allowance Recorded [Abstract]
Average Recorded Investment	66	317
Interest Income Recognized	0	5
Total [Abstract]
Average Recorded Investment	487	661
Interest Income Recognized	31	49
Consumer And Other [Member]
Impaired Loans With No Related Allowance Recorded [Abstract]
Average Recorded Investment	0	9
Interest Income Recognized	0	1
Total [Abstract]
Average Recorded Investment	0	9
Interest Income Recognized	$ 0	$ 1

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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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