Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Common Stock [Member]
Net income
Cash dividend declared on common shares and payable after period-end	401,000	$ 400,000
Preferred Stock [Member]
Cash dividend declared on common shares and payable after period-end		50,000
Net income	596,000	4,191,000
Provision for depreciation and amortization	913,000	743,000
Amortization of core deposit intangibles	75,000
Amortization of debt issuance costs	22,000
Compensation expense associated with stock options	13,000	24,000
Compensation expense associated with restricted stock	106,000	47,000
Net gain on sale of securities available-for-sale	(122,000)	(276,000)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	546,000
Amortization of investment premiums and accretion of discounts, net	865,000	947,000
Amortization of held-to-maturity fair value adjustments	(57,000)	(77,000)
Loss on cancellation of interest rate swap	2,325,000
Loss (gain) on disposal of fixed assets	2,000	(4,000)
Write-down of fixed assets		237,000
Write-down of other real estate owned	(76,000)
Loss (gain) on sale of other real estate owned	149,000	(5,000)
Decrease in deferred income taxes	363,000
Increase in cash surrender value of life insurance	(309,000)	(324,000)
(Decrease) increase in deferred compensation and salary continuation plans	(32,000)	143,000
Increase in deferred loan fees and costs	(158,000)	(246,000)
Decrease in other assets	456,000	186,000
Decrease in other liabilities	(2,396,000)	(2,311,000)
Net cash provided by operating activities	3,433,000	3,275,000
Proceeds from maturities of and payments on available-for-sale securities	11,430,000	12,184,000
Proceeds from sales of securities	34,389,000	35,912,000
Purchases of available-for-sale securities	(45,075,000)	(23,706,000)
Proceeds from maturities of and payments on held-to-maturity securities	600,000	240,000
Investment in qualified affordable housing partnerships	(659,000)	(830,000)
Net redemption of Federal Home Loan Bank of San Francisco stock		1,263,000
Loan originations, net of principal repayments	(43,211,000)	(30,922,000)
Purchase of loan pools	(19,247,000)	(27,221,000)
Repayments on loan pools	25,689,000	16,677,000
Purchase of premises and equipment	(1,313,000)	(193,000)
Proceeds from the sale of other real estate owned	514,000	2,444,000
Payments to derivative counterparties for the termination of interest rate swaps	(2,578,000)
Acquisition of branches, net of cash paid	142,411,000
Net cash provided (used) by investing activities	102,950,000	(14,152,000)
Net increase (decrease) in demand deposits and savings accounts	10,750,000	(23,043,000)
Net decrease in certificates of deposit	(25,976,000)	(5,953,000)
Advances on term debt	30,000,000	130,000,000
Repayment of term debt	(105,512,000)	(115,000,000)
Proceeds from stock options exercised	4,000	146,000
Cash dividends paid on preferred stock		(100,000)
Cash dividends paid on common stock	(801,000)	(799,000)
Net cash used in financing activities	(91,535,000)	(14,749,000)
Net increase (decrease) in cash and cash equivalents	14,848,000	(25,626,000)
Cash and cash equivalents at beginning of year	51,192,000	58,422,000
Cash and cash equivalents at end of period	66,040,000	32,796,000
Income taxes	2,130,000	3,426,000
Interest	2,970,000	2,229,000
Real Estate Owned, Transfer to Real Estate Owned	81,000	3,172,000
Transfer of fixed asset to other real estate owned		170,000
Changes in unrealized gain (loss) on investment securities available-for-sale	1,024,000	(1,073,000)
Changes in net deferred tax asset related to changes in unrealized gain (loss) on investment securities available-for-sale	(421,000)	444,000
Changes in accumulated other comprehensive income due to changes in unrealized gain on investment securities available-for-sale	603,000	(629,000)
Accretion of held-to-maturity investment securities from other comprehensive income to interest income	(57,000)	(77,000)
Changes in deferred tax related to accretion of held-to-maturity investment securities	23,000	31,000
Changes in accumulated other comprehensive income due to accretion of held-to-maturity investment securities	(34,000)	(46,000)
Changes in unrealized loss on derivatives	(348,000)	(460,000)
Changes in net deferred tax asset related to changes in unrealized loss on derivatives	143,000	189,000
Changes in accumulated other comprehensive income due to changes in unrealized loss on derivatives	(205,000)	(271,000)
Interest rate swaps	2,721,000	587,000
Changes in net deferred tax asset related to reclassification of losses from (loss) on derivatives	(1,120,000)	(237,000)
Changes in accumulated other comprehensive income due to reclassification of losses from loss on derivatives	1,601,000	350,000
Vested restricted stock issued under employee plans	84,000	36,000
Transactions Related to Acquisition:
Assets acquired - fair value	155,230,000
Goodwill	665,000
Liabilities assumed - fair value	$ 149,239,000