Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash flows from operating activities:
Net income	$ 5,259	$ 8,586	$ 5,727
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses			3,175
Provision for depreciation and amortization	1,908	1,524	1,320
Amortization of core deposit intangible	185
Amortization of debt issuance costs	40	4
Compensation expense associated with stock options	24	42	54
Compensation expense associated with restricted stock	215	89	6
Net (gain) loss on sale or call of securities	(244)	(443)	159
Other than temporary impairment on investment securities	546
Amortization of investment premiums and accretion of discounts, net	1,715	1,876	1,662
Amortization of held-to-maturity fair value adjustments	(97)	(144)	(155)
Loss on cancellation of interest rate swap	2,325
Loss (gain) on disposal of fixed assets	1	(4)	7
Write-down of fixed assets		238
Write-down of other real estate owned	66		290
Loss on sale of other real estate owned	109	26	8
Increase in cash surrender value of life insurance	(613)	(641)	(628)
(Decrease) increase in deferred compensation and salary continuation plans	(19)	28	1,388
(Increase) decrease in deferred loan fees and costs	(454)	(713)	146
Gain on repayment of junior subordinated debentures			(406)
Increase (decrease) in deferred income taxes	495	584	(191)
Decrease (increase) in other assets	117	505	(946)
Increase (decrease) in other liabilities	306	(1,219)	2,464
Net cash provided by operating activities	11,884	10,338	14,080
Cash flows from investing activities:
Proceeds from maturities and payments of available-for-sale securities	31,685	23,426	20,248
Proceeds from sale of available-for-sale securities	51,025	71,277	93,545
Purchases of available-for-sale securities	(104,134)	(69,362)	(79,852)
Proceeds from maturities and payments of held-to-maturity securities	4,963	1,099	311
Purchases of held-to-maturity securities			(244)
Investment in Qualified Zone Academy Bonds	(2,000)
Investment in qualified affordable housing partnerships	(697)	(1,133)	(2,371)
Net redemption (purchase) of Federal Home Loan Bank of San Francisco stock		1,263	(1,198)
Loan (originations), net of principal repayments	(105,892)	(46,554)	(21,344)
Net repayment on (purchase of) purchased loans	18,666	(12,715)	(48,775)
Purchase of life insurance			(5,000)
Purchase of premises and equipment	(2,873)	(705)	(2,729)
Proceeds from the sale of other real estate owned	636	3,111	802
Proceeds from settlement of note to former mortgage subsidiary			686
Payments to derivative counterparties for the termination of interest rate swaps	(2,578)
Acquisition of branches, net of cash paid	142,411
Net cash provided (used) by investing activities	31,212	(30,293)	(45,921)
Cash flows from financing activities:
Net increase in demand deposits and savings accounts	84,722	35,382	46,470
Net decrease in certificates of deposit	(32,838)	(20,682)	(3,728)
Advances on term debt	55,000	260,000	250,000
Repayment of term debt	(131,172)	(240,083)	(250,000)
Repayment of junior subordinated debentures			(4,629)
Debt issuance costs paid		(225)
Proceeds from stock options exercised	10	156	23
Repurchase of common stock			(4,562)
Redemption of preferred stock		(20,000)
Preferred stock extinguishment costs		(33)
Cash dividends paid on preferred stock		(189)	(200)
Cash dividends paid on common stock	(1,603)	(1,601)	(1,626)
Net cash provided by (used in) financing activities	(25,881)	12,725	31,748
Net increase (decrease) cash and cash equivalents	17,215	(7,230)	(93)
Cash and cash equivalents at the beginning of year	51,192	58,422	58,515
Cash and cash equivalents at the end of year	68,407	51,192	58,422
Supplemental disclosures of cash flow activity:
Income taxes	2,705	4,123	419
Interest	5,142	4,628	4,192
Supplemental disclosures of non cash investing activities:
Transfer of loans to other real estate owned	147	3,888	689
Transfer of fixed asset to other real estate owned		170
Changes in unrealized (loss) gain on investment securities available-for-sale	(2,964)	(985)	6,307
Changes in net deferred tax asset related to changes in unrealized (loss) gain on investment securities available-for-sale	1,220	402	(2,596)
Changes in accumulated other comprehensive income due to changes in unrealized (loss) gain on investment securities available-for-sale	(1,744)	(583)	3,711
Accretion of held-to-maturity investment securities from other comprehensive income to interest income	(97)	(144)	(155)
Changes in deferred tax related to accretion of held-to-maturity investment securities	40	59	64
Changes in accumulated other comprehensive income due to accretion of held-to-maturity investment securities	(57)	(85)	(91)
Changes in unrealized loss on derivatives	(348)	(584)	(333)
Changes in net deferred tax asset related to changes in unrealized loss on derivatives	143	242	136
Changes in accumulated other comprehensive income due to changes in unrealized loss on derivatives	(205)	(342)	(197)
Reclassification of losses (gains) on derivatives	2,721	1,435	(1,900)
Changes in net deferred tax asset related to reclassification of losses (gains) on derivatives	(1,120)	(592)	782
Changes in accumulated other comprehensive income due to reclassification of losses (gains) on derivatives	1,601	843	(1,118)
Supplemental disclosures of non cash financing activities:
Vested restricted stock issued under employee plans	84	36	66
Preferred stock accretion
Dividend payable	401	400
Transactions Related to Acquisition:
Assets acquired - fair value	155,230
Goodwill	665
Liabilities assumed - fair value	149,239
Preferred Stock [Member]
Cash flows from operating activities:
Net income
Supplemental disclosures of non cash financing activities:
Preferred stock accretion		69
Dividend payable			50
Common Stock [Member]
Cash flows from operating activities:
Net income
Supplemental disclosures of non cash financing activities:
Preferred stock accretion
Dividend payable	$ 401	$ 400	$ 399