Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Interest and fees on loans	$ 35,435	$ 32,871	$ 29,464
Interest on taxable securities	2,986	3,284	4,214
Interest on tax-exempt securities	2,256	2,392	2,536
Interest on interest-bearing deposits in other banks	332	206	479
Total interest income	41,009	38,753	36,693
Service charges on deposit accounts	413	204	186
ATM and point of sale fees	995	383	330
Fees on payroll and benefit processing	593	555	508
Earnings on cash surrender value – life insurance	613	641	628
Gain (loss) on sale of investment securities, net	244	443	(159)
Impairment losses on investment securities	(546)
Federal Home Loan Bank of San Francisco dividends	644	630	345
Other income	639	327	2,477
Total noninterest income	3,595	3,183	4,315
Interest expense:
Interest on demand deposits	523	460	471
Interest on savings deposits	174	213	228
Interest on certificates of deposit	2,179	2,356	2,608
Interest on term debt	1,667	1,759	422
Interest on junior subordinated debentures	235	195	363
Total interest expense	4,778	4,983	4,092
Net interest income	36,231	33,770	32,601
Provision for loan and lease losses			3,175
Net interest income after provision for loan and lease losses	36,231	33,770	29,426
Noninterest expense:
Salaries and related benefits	16,425	14,303	14,965
Premises and equipment	3,869	2,894	2,784
Federal Deposit Insurance Corporation insurance premium	615	717	798
Data processing fees	1,675	1,016	926
Professional service fees	1,690	1,628	1,398
Telecommunications	751	449	372
Branch acquisition costs	580	347
Loss on cancellation of interest rate swap	2,325
Other expenses	4,679	3,551	5,191
Total noninterest expense	32,609	24,905	26,434
Income before provision for income taxes	7,217	12,048	7,307
Provision for income taxes	1,958	3,462	1,580
Net income	5,259	8,586	5,727
Less: Preferred stock extinguishment costs		102
Less: Preferred stock dividends		189	200
Income available to common shareholders	$ 5,259	$ 8,295	$ 5,527
Earnings per share - basic (in dollars per share)	$ 0.39	$ 0.62	$ 0.41
Weighted average shares - basic (in shares)	13,367	13,331	13,475
Earnings per share - diluted (in dollars per share)	$ 0.39	$ 0.62	$ 0.41
Weighted average shares - diluted (in shares)	13,425	13,365	13,520