10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2018

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________________ to __________________

Commission File Number  001-33572

Bank of Marin Bancorp

(Exact name of Registrant as specified in its charter)

California	20-8859754
(State or other jurisdiction of incorporation)	(IRS Employer Identification No.)
504 Redwood Blvd., Suite 100, Novato, CA	94947
(Address of principal executive office)	(Zip Code)

Registrant’s telephone number, including area code:  (415) 763-4520

Indicate by check mark whether the registrant (1) has filed all reports to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x                    No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes x                   No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer o		Accelerated filer x
Non-accelerated filer o	(Do not check if a smaller reporting company)	Smaller reporting company o
Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

o

Indicate by check mark if the registrant is a shell company, as defined in Rule 12b-2 of the Exchange Act.

Yes   o     No  x

As of July 31, 2018, there were 6,993,452 shares of common stock outstanding.

TABLE OF CONTENTS

PART I	FINANCIAL INFORMATION	Page-3
ITEM 1.	Financial Statements	Page-3
	Consolidated Statements of Condition	Page-3
	Consolidated Statements of Comprehensive Income	Page-4
	Consolidated Statements of Changes in Stockholders' Equity	Page-5
	Consolidated Statements of Cash Flows	Page-6
	Notes to Consolidated Financial Statements	Page-7
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	Page-31
ITEM 3.	Quantitative and Qualitative Disclosure about Market Risk	Page-44
ITEM 4.	Controls and Procedures	Page-45
PART II	OTHER INFORMATION	Page-46
ITEM 1.	Legal Proceedings	Page-46
ITEM 1A.	Risk Factors	Page-46
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	Page-46
ITEM 3.	Defaults Upon Senior Securities	Page-46
ITEM 4.	Mine Safety Disclosures	Page-46
ITEM 5.	Other Information	Page-46
ITEM 6.	Exhibits	Page-46
SIGNATURES		Page-48

Page-2

PART I       FINANCIAL INFORMATION

ITEM 1.  Financial Statements

BANK OF MARIN BANCORP

CONSOLIDATEDSTATEMENTS OFCONDITION

June 30, 2018 and December 31, 2017

(in thousands, except share data; unaudited)	June 30, 2018			December 31, 2017
Assets
Cash and due from banks	$	83,855		$	203,545
Investment securities
Held-to-maturity, at amortized cost	170,652			151,032
Available-for-sale, at fair value	388,137			332,467
Total investment securities	558,789			483,499
Loans, net of allowance for loan losses of $15,813 and $15,767 at June 30, 2018 and December 31, 2017, respectively	1,701,798			1,663,246
Bank premises and equipment, net	7,965			8,612
Goodwill	30,140			30,140
Core deposit intangible	6,032			6,492
Interest receivable and other assets	76,463			72,620
Total assets	$	2,465,042		$	2,468,154
Liabilities and Stockholders' Equity
Liabilities
Deposits
Non-interest bearing	$	1,057,745		$	1,014,103
Interest bearing
Transaction accounts	132,272			169,195
Savings accounts	179,187			178,473
Money market accounts	631,479			626,783
Time accounts	137,040			160,116
Total deposits	2,137,723			2,148,670
Subordinated debentures	5,802			5,739
Interest payable and other liabilities	17,319			16,720
Total liabilities	2,160,844			2,171,129
Stockholders' Equity
Preferred stock, no par value, Authorized - 5,000,000 shares, none issued	—			—
Common stock, no par value, Authorized - 15,000,000 shares; Issued and outstanding - 6,991,821 and 6,921,542 at June 30, 2018 and December 31, 2017, respectively	146,195			143,967
Retained earnings	166,281			155,544
Accumulated other comprehensive loss, net of taxes	(8,278		)	(2,486		)
Total stockholders' equity	304,198			297,025
Total liabilities and stockholders' equity	$	2,465,042		$	2,468,154

The accompanying notes are an integral part of these consolidated financial statements (unaudited).

Page-3

BANK OF MARIN BANCORP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three months ended						Six months ended
(in thousands, except per share amounts; unaudited)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Interest income
Interest and fees on loans	$	19,624		$	16,423		$	38,511		$	32,272
Interest on investment securities
Securities of U.S. government agencies	2,860			1,534			5,335			3,052
Obligations of state and political subdivisions	604			553			1,242			1,121
Corporate debt securities and other	35			36			79			73
Interest on Federal funds sold and due from banks	285			157			688			217
Total interest income	23,408			18,703			45,855			36,735
Interest expense
Interest on interest-bearing transaction accounts	48			21			100			50
Interest on savings accounts	18			16			36			31
Interest on money market accounts	236			114			452			227
Interest on time accounts	140			139			296			285
Interest on Federal Home Loan Bank ("FHLB") and other borrowings	1			—			1			—
Interest on subordinated debentures	123			109			237			217
Total interest expense	566			399			1,122			810
Net interest income	22,842			18,304			44,733			35,925
Provision for loan losses	—			—			—			—
Net interest income after provision for loan losses	22,842			18,304			44,733			35,925
Non-interest income
Service charges on deposit accounts	455			447			932			899
Wealth Management and Trust Services	488			504			1,003			1,007
Debit card interchange fees	360			384			756			756
Merchant interchange fees	118			112			198			208
Earnings on bank-owned life insurance	230			210			458			419
Dividends on FHLB stock	192			176			388			408
Gains on investment securities, net	11			10			11			10
Other income	384			253			734			504
Total non-interest income	2,238			2,096			4,480			4,211
Non-interest expense
Salaries and related benefits	8,316			7,287			17,333			14,762
Occupancy and equipment	1,511			1,380			3,018			2,699
Depreciation and amortization	546			463			1,093			944
Federal Deposit Insurance Corporation insurance	191			162			382			323
Data processing	1,023			963			2,404			1,902
Professional services	810			522			2,109			1,044
Directors' expense	183			224			357			382
Information technology	264			186			533			384
Provision for losses on off-balance sheet commitments	—			(208		)	—			(43		)
Other expense	1,665			1,652			3,361			3,245
Total non-interest expense	14,509			12,631			30,590			25,642
Income before provision for income taxes	10,571			7,769			18,623			14,494
Provision for income taxes	2,680			2,583			4,343			4,760
Net income	$	7,891		$	5,186		$	14,280		$	9,734
Net income per common share:
Basic	$	1.14		$	0.85		$	2.06		$	1.60
Diluted	$	1.12		$	0.84		$	2.03		$	1.58
Weighted average shares:
Basic	6,944			6,110			6,929			6,101
Diluted	7,033			6,174			7,019			6,173
Dividends declared per common share	$	0.31		$	0.27		$	0.60		$	0.54
Comprehensive income:
Net income	$	7,891		$	5,186		$	14,280		$	9,734
Other comprehensive (loss) income
Change in net unrealized gain or loss on available-for-sale securities	(1,131		)	1,961			(7,301		)	3,635
Reclassification adjustment for gains on available-for-sale securities in net income	(11		)	(10		)	(11		)	(10		)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity	(278		)	—			(278		)	—
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity	132			124			268			165
Subtotal	(1,288		)	2,075			(7,322		)	3,790
Deferred tax (benefit) expense	(384		)	892			(2,168		)	1,596
Other comprehensive (loss) income, net of tax	(904		)	1,183			(5,154		)	2,194
Comprehensive income	$	6,987		$	6,369		$	9,126		$	11,928

The accompanying notes are an integral part of these consolidated financial statements (unaudited).

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BANK OF MARIN BANCORP

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

for the year ended December 31, 2017 and the six months ended June 30, 2018

(in thousands, except share data; unaudited)	Common Stock					Retained Earnings			Accumulated Other Comprehensive Loss ("AOCI"), Net of Taxes			Total
	Shares		Amount
Balance at December 31, 2016	6,127,314		$	87,392		$	146,464		$	(3,293	)	$	230,563
Net income	—		—			15,976			—			15,976
Other comprehensive income	—		—			—			807			807
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	9,266		28			—			—			28
Stock issued under employee stock purchase plan	512		32			—			—			32
Stock issued under employee stock ownership plan ("ESOP")	29,547		1,850			—			—			1,850
Restricted stock granted	16,230		—			—			—			—
Stock-based compensation - stock options	—		529			—			—			529
Stock-based compensation - restricted stock	—		742			—			—			742
Cash dividends paid on common stock	—		—			(6,896		)	—			(6,896		)
Stock purchased by directors under director stock plan	531		35			—			—			35
Stock issued in payment of director fees	2,878		188			—			—			188
Stock and stock options issued to Bank of Napa shareholders (net of payment for fractional shares of $14 thousand)	735,264		53,171			—			—			53,171
Balance at December 31, 2017	6,921,542		$	143,967		$	155,544		$	(2,486	)	$	297,025
Net income						14,280						14,280
Other comprehensive loss									(5,154		)	(5,154		)
Reclassification of stranded tax effects in AOCI						638			(638		)	—
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	50,075		534									534
Stock issued under employee stock purchase plan	265		19									19
Stock issued under ESOP	7,900		601									601
Restricted stock granted	18,520											—
Restricted stock surrendered for tax withholdings upon vesting	(658	)	(45		)							(45		)
Restricted stock forfeited / cancelled	(6,028	)										—
Stock-based compensation - stock options			442									442
Stock-based compensation - restricted stock			672									672
Cash dividends paid on common stock						(4,181		)				(4,181		)
Stock purchased by directors under director stock plan	260		18									18
Stock issued in payment of director fees	1,343		91									91
Stock repurchased, net of commissions	(1,398	)	(104		)							(104		)
Balance at June 30, 2018	6,991,821		146,195			166,281			(8,278		)	304,198

The accompanying notes are an integral part of these consolidated financial statements (unaudited).

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BANK OF MARIN BANCORP

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the six months ended June 30, 2018 and 2017

(in thousands; unaudited)	June 30, 2018			June 30, 2017
Cash Flows from Operating Activities:
Net income	$	14,280		$	9,734
Adjustments to reconcile net income to net cash provided by operating activities:
Reversal of losses on off-balance sheet commitments	—			(43		)
Noncash contribution expense to employee stock ownership plan	601			—
Noncash director compensation expense	146			106
Stock-based compensation expense	1,114			710
Amortization of core deposit intangible	460			236
Amortization of investment security premiums, net of accretion of discounts	1,496			1,496
Accretion of discount on acquired loans	(428		)	(498		)
Accretion of discount on subordinated debentures	63			80
Net change in deferred loan origination costs/fees	18			60
Gain on sale of investment securities	(11		)	(10		)
Depreciation and amortization	1,093			944
Gain on sale of repossessed assets	—			(1		)
Earnings on bank-owned life insurance policies	(458		)	(419		)
Net change in operating assets and liabilities:
Deferred rent and other rent-related expenses	(179		)	114
Interest receivable and other assets	(971		)	93
Interest payable and other liabilities	1,543			(389		)
Total adjustments	4,487			2,479
Net cash provided by operating activities	18,767			12,213
Cash Flows from Investing Activities:
Purchase of held-to-maturity securities	(1,989		)	(4,496		)
Purchase of available-for-sale securities	(121,269		)	(9,377		)
Proceeds from sale of available-for-sale securities	5,006			1,321
Proceeds from paydowns/maturities of held-to-maturity securities	9,615			14,601
Proceeds from paydowns/maturities of available-for-sale securities	24,540			15,385
Loans originated and principal collected, net	(38,835		)	(4,563		)
Purchase of premises and equipment	(446		)	(814		)
Proceeds from sale of other real estate owned or repossessed assets	—			170
Cash paid for low-income housing tax credit investment	(373		)	(628		)
Net cash (used in) provided by investing activities	(123,751		)	11,599
Cash Flows from Financing Activities:
Net (decrease) increase in deposits	(10,947		)	67,840
Proceeds from stock options exercised	585			88
Payment of tax withholdings for stock options exercised and vesting of restricted stock	(96		)	(60		)
Proceeds from stock issued under employee and director stock purchase plans	37			737
Stock repurchased, net of commissions	(104		)	—
Cash dividends paid on common stock	(4,181		)	(3,315		)
Net cash (used in) provided by financing activities	(14,706		)	65,290
Net (decrease) increase in cash and cash equivalents	(119,690		)	89,102
Cash and cash equivalents at beginning of period	203,545			48,804
Cash and cash equivalents at end of period	$	83,855		$	137,906
Supplemental disclosure of cash flow information:
Cash paid in interest	$	1,083		$	751
Cash paid in income taxes	$	2,000		$	4,620
Supplemental disclosure of noncash investing and financing activities:
Change in net unrealized gain or loss on available-for-sale securities	$	(7,301	)	$	3,635
Securities transferred from available-for-sale to held-to-maturity	$	27,422		$	128,965
Amortization of net unrealized loss on available-for-sale securities transferred to held-to-maturity	$	268		$	165
Stock issued to ESOP	$	601		$	—
Stock issued in payment of director fees	$	91		$	82

The accompanying notes are an integral part of these consolidated financial statements (unaudited).

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NOTES TO CONSOLIDATEDFINANCIAL STATEMENTS (Unaudited)

Note 1:  Basis of Presentation

The consolidated financial statements include the accounts of Bank of Marin Bancorp (“Bancorp”), a bank holding company, and its wholly-owned bank subsidiary, Bank of Marin (the “Bank”), a California state-chartered commercial bank. References to “we,” “our,” “us” mean Bancorp and the Bank that are consolidated for financial reporting purposes. The accompanying unaudited consolidated interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted pursuant to those rules and regulations. Although we believe that the disclosures are adequate and the information presented is not misleading, we suggest that these interim financial statements be read in conjunction with the annual financial statements and the notes thereto included in our 2017 Annual Report on Form 10-K.  In the opinion of Management, the unaudited consolidated financial statements reflect all adjustments, which are necessary for a fair presentation of the consolidated financial position, the results of operations, changes in comprehensive income, changes in stockholders’ equity, and cash flows for the periods presented. All material intercompany transactions have been eliminated. The results of these interim periods may not be indicative of the results for the full year or for any other period.

The NorCal Community Bancorp Trusts I and II, respectively (the "Trusts") were formed for the sole purpose of issuing trust preferred securities. Bancorp is not considered the primary beneficiary of the Trusts (variable interest entities), therefore the Trusts are not consolidated in our consolidated financial statements, but rather the subordinated debentures are shown as a liability on our consolidated statements of condition (See Note 6, Borrowings). Bancorp accounts for its investment in the securities of the Trusts under the equity method, which is included in interest receivable and other assets in the consolidated statements of condition.

The following table shows: 1) weighted average basic shares, 2) potentially dilutive weighted average common shares related to stock options and unvested restricted stock awards, and 3) weighted average diluted shares. Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Weighted average basic shares outstanding	6,944		6,110		6,929		6,101
Potentially dilutive common shares related to:
Stock options	74		52		74		57
Unvested restricted stock awards	15		12		16		15
Weighted average diluted shares outstanding	7,033		6,174		7,019		6,173
Net income	$	7,891	$	5,186	$	14,280	$	9,734
Basic EPS	$	1.14	$	0.85	$	2.06	$	1.60
Diluted EPS	$	1.12	$	0.84	$	2.03	$	1.58
Weighted average anti-dilutive shares not included in the calculation of diluted EPS	30		33		35		23

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Note 2: Recently Adopted and Issued Accounting Standards

Accounting Standards Adopted in 2018

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of this ASU (and all subsequent updates) is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. This ASU establishes a five-step model that must be used to recognize revenue that requires the entity to identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the entity satisfies the performance obligation. The ASU does not apply to the majority of our revenue, including revenue associated with financial instruments, such as loans and investment securities, and certain non-interest income, such as earnings on bank-owned life insurance, dividends on Federal Home Loan Bank ("FHLB") stock, gains or losses on sales of investment securities, and deposit overdraft charges. The standard allowed the use of either the full retrospective or modified retrospective transition method. We elected to apply the modified retrospective transition method to incomplete contracts as of the initial date of application on January 1, 2018. The adoption of the new standards did not have a material impact on our financial condition or results of operations as revenue recognition under the new standards did not change significantly from our current practice of recognizing the in-scope non-interest income. In addition, we did not retroactively revise prior period amounts or record a cumulative adjustment to retained earnings upon adoption. We considered the nature, amount, timing, and uncertainty of revenue from contracts with customers and determined that significant revenue streams are sufficiently disaggregated in the consolidated statements of comprehensive income.

Descriptions of our significant revenue-generating transactions that are within the scope of the new revenue recognition standards, which are presented in the consolidated statements of comprehensive income as components of non-interest income, are as follows:

• Wealth Management & Trust ("WM&T") fees - WM&T services include, but are not limited to: customized investment advisory and management; administrative services such as bill pay and tax reporting; trust administration, estate settlement, custody and fiduciary services. Performance obligations for investment advisory and management services are generally satisfied over time. Revenue is recognized monthly according to a tiered fee schedule based on the client's month-end market value of assets under our management. WM&T does not earn revenue based on performance or incentives. Costs associated with WM&T revenue-generating activities, such as payments to sub-advisors, are recorded separately as part of professional service expenses when incurred.

• Deposit account service charges - Service charges on deposit accounts consist of monthly maintenance fees, business account analysis fees, business online banking fees, check order charges, and other deposit account-related fees. Performance obligations for monthly maintenance fees and account analysis fees are satisfied, and the related revenue recognized, when we complete our performance obligation each month. Performance obligations related to transaction-based services (such as check orders) are satisfied, and the related revenue recognized, at a point in time when completed, except for business accounts subject to analysis where the transaction-based fees are part of the monthly account analysis fees.

• Debit card interchange fees - We issue debit cards to our consumer and small business customers that allow them to purchase goods and services from merchants in person, online, or via mobile devices using funds held in their demand deposit accounts held with us. Debit cards issued to our customers are part of global electronic payment networks (such as Visa) who pass a portion of the merchant interchange fees to debit card-issuing member banks like us when our customers make purchases through their networks. Performance obligations for debit card services are satisfied and revenue is recognized daily as the payment networks process transactions. Because we act in an agent capacity, we determined that network costs previously recorded as a component of non-interest expense should be netted with interchange fees recorded in non-interest income. Network costs were immaterial for the six months ended June 30, 2018 and 2017.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU make improvements to accounting standards related to financial instruments, including the following:

Page-8

• Requires equity investments, except for those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

• Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When impairment exists, an entity is required to measure the investment at fair value.

• Eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value required under current standards for financial instruments measured at amortized cost on the consolidated balance sheet.

• Requires public companies to use the exit price notion when measuring and disclosing the fair value of financial instruments.

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements.

• Clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets.

We adopted the requirements of this ASU effective January 1, 2018, which did not have a material impact on our financial condition and results of operations. The fair value of our loans held for investment, which is recorded at amortized cost, now incorporates the exit price notion reflecting factors such as a liquidity premium. See Note 3, Fair Value of Assets and Liabilities.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on how to present and classify eight specific cash flow topics in the statement of cash flows. The ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The amendments should be applied using a retrospective transition method to each period presented, if practical. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures for the periods presented.

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The amendments are intended to help companies evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses and provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments should be applied prospectively and are effective for annual periods after December 31, 2017, including interim periods within those periods. We adopted the amendments effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures in the first quarter of 2018.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. This ASU applies to entities that change the terms or conditions of a share-based payment award. The FASB adopted this ASU to provide clarity in what constitutes a modification and to reduce diversity in practice in applying Topic 718. In order for a change to a share-based arrangement to not require Topic 718 modification accounting treatment, all of the following must be met: no change in fair value, no change in vesting conditions and no change in the balance sheet classification of the modified award. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted, including adoption in an interim period. The amendments should be applied prospectively to an award modified on or after the adoption date. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operation, or related financial statement disclosures.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This amendment changes both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. It is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting and increase transparency as to the scope and results of hedging programs. The ASU is effective for fiscal years beginning after

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December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We early-adopted the amendments of this ASU in the second quarter of 2018, and elected to perform hedge effectiveness assessments using a qualitative approach instead of quantitative regression analysis going forward. The adoption of this ASU had an immaterial impact to our financial results. The amendments also require additional disclosures, which are included in Note 9, Derivative Financial Instruments and Hedging Activities.

In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This amendment helps organizations address certain stranded income tax effects in accumulated other comprehensive income (AOCI) resulting from the enactment of the Tax Cuts and Jobs Act of 2017. The ASU requires financial statement preparers to disclose a description of the accounting policy for releasing income tax effects from AOCI, whether or not they elect to reclassify the stranded income tax effects from the Tax Cuts and Jobs Act of 2017, and information about the other income tax effects that are reclassified. The amendments are effective for all organizations for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The amendments in this ASU should be applied in either the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. We early adopted this ASU in the first quarter of 2018. See Note 7, Stockholders' Equity.

Accounting Standards Not Yet Effective

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The amendments in this ASU intend to increase transparency and comparability among organizations by recognizing an asset, which represents the right to use the asset for the lease term, and a lease liability, which is a lessee's obligation to make lease payments measured on a discounted basis. This ASU generally applies to leasing arrangements exceeding a twelve-month term. ASU 2016-02 is effective for annual periods, including interim periods within those annual periods beginning after December 15, 2018 and requires a modified retrospective method of adoption. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which provides various corrections and clarifications to ASU 2016-02. Early application of the amendments is permitted. We intend to adopt this ASU during the first quarter of 2019, as required. We completed an inventory of our lease agreements and continue to evaluate potential accounting software solutions that will aid in the transition to the new leasing guidance. As of June 30, 2018, our undiscounted operating lease obligations that were off-balance sheet totaled $16.5 million (See Note 8, Commitments and Contingencies). Upon adoption of this ASU, the present values of leases currently classified as operating leases will be recognized as lease assets and liabilities on our consolidated balance sheets. Additional disclosures of key information about our leasing arrangements will also be required. We do not expect that the ASU will have a material impact on our capital ratios or return on average assets when adopted and we are currently evaluating the effect that the ASU will have on other components of our financial condition and results of operations.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Under the new guidance, entities will be required to present financial assets at the net amount expected to be collected. The measurement of expected credit losses will be based on historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of a credit over its remaining life. In addition, the ASU amends the accounting for expected credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have formed an internal Current Expected Credit Loss ("CECL") committee and are working with our third party vendor to determine the appropriate methodologies and resources to utilize in preparation for transition to the new accounting standards. The impact of this ASU on our financial condition and results of operations is not known at this time.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. This update simplifies the accounting for share-based payment transactions for acquiring goods and services from nonemployees, applying some of the same requirements as employee share-based payment transactions. The ASU will not affect the accounting for share-based payment awards to nonemployee directors, which will continue to be treated as employee share-based transactions under the current standards. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We do not expect that the ASU will have a material impact on our financial condition or results of operations, as it is not our practice to issue stock-based awards to pay for goods and services from nonemployees, other than nonemployee directors.

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Note 3:  Fair Value of Assets and Liabilities

Fair Value Hierarchy and Fair Value Measurement

We group our assets and liabilities that are measured at fair value in three levels within the fair value hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

Level 1: Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuations for which all significant assumptions are observable or can be corroborated by observable market data.

Level 3: Valuations are based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Values are determined using pricing models and discounted cash flow models and may include significant Management judgment and estimation.

Transfers between levels of the fair value hierarchy are recognized through our monthly and/or quarterly valuation process in the reporting period during which the event or circumstances that caused the transfer occurred.

The following table summarizes our assets and liabilities that were required to be recorded at fair value on a recurring basis.

(in thousands)   Description of Financial Instruments	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)		Measurement Categories: Changes in Fair Value Recorded In1
June 30, 2018
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	240,794	$	—	$	240,794	$	—	OCI
SBA-backed securities	23,954		—		23,954		—		OCI
Debentures of government sponsored agencies	32,139		—		32,139		—		OCI
Privately-issued collateralized mortgage obligations	435		—		435		—		OCI
Obligations of state and political subdivisions	87,788		—		87,788		—		OCI
Corporate bonds	3,027		—		3,027		—		OCI
Derivative financial assets (interest rate contracts)	327		—		327		—		NI
Derivative financial liabilities (interest rate contracts)	276		—		276		—		NI
December 31, 2017
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	188,061	$	—	$	188,061	$	—	OCI
SBA-backed securities	25,982		—		25,817		165		OCI
Debentures of government sponsored agencies	12,938		—		12,938		—		OCI
Privately-issued collateralized mortgage obligations	1,431		—		1,431		—		OCI
Obligations of state and political subdivisions	97,491		—		97,491		—		OCI
Corporate bonds	6,564		—		6,564		—		OCI
Derivative financial assets (interest rate contracts)	74		—		74		—		NI
Derivative financial liabilities (interest rate contracts)	740		—		740		—		NI

 ¹ Other comprehensive income ("OCI") or net income ("NI").

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Securities available-for-sale are recorded at fair value on a recurring basis. When available, quoted market prices (Level 1) are used to determine the fair value of securities available-for-sale. If quoted market prices are not available, we obtain pricing information from a reputable third-party service provider, who may utilize valuation techniques that use current market-based or independently sourced parameters, such as bid/ask prices, dealer-quoted prices, interest rates, benchmark yield curves, prepayment speeds, probability of default, loss severity and credit spreads (Level 2).   Level 2 securities include obligations of state and political subdivisions, U.S. agencies or government-sponsored agencies' debt securities, mortgage-backed securities, government agency-issued, privately-issued collateralized mortgage obligations, and corporate bonds. As of June 30, 2018 and December 31, 2017, there were no Level 1 securities. As of December 31, 2017, we had one Level 3 available-for-sale U.S. government agency obligation, which was paid off during the second quarter of 2018.

Securities held-to-maturity may be written down to fair value (determined using the same techniques discussed above for securities available-for-sale) as a result of other-than-temporary impairment, and we did not record any write-downs during the six months ended June 30, 2018 or June 30, 2017.

On a recurring basis, derivative financial instruments are recorded at fair value, which is based on the income approach using observable Level 2 market inputs, reflecting market expectations of future interest rates as of the measurement date.  Standard valuation techniques are used to calculate the present value of the future expected cash flows assuming an orderly transaction.  Valuation adjustments may be made to reflect both our own credit risk and the counterparties’ credit risk in determining the fair value of the derivatives. Level 2 inputs for the valuations are limited to observable market prices for London Interbank Offered Rate ("LIBOR") and Overnight Index Swap ("OIS") rates (for the very short term), quoted prices for LIBOR futures contracts, observable market prices for LIBOR and OIS swap rates, and one-month and three-month LIBOR basis spreads at commonly quoted intervals.  Mid-market pricing of the inputs is used as a practical expedient in the fair value measurements.  We project spot rates at reset days specified by each swap contract to determine future cash flows, then discount to present value using either LIBOR or OIS curves depending on whether the swap positions are fully collateralized as of the measurement date.  When the value of any collateral placed with counterparties is less than the interest rate derivative liability, a credit valuation adjustment ("CVA") is applied to reflect the credit risk we pose to counterparties.  We have used the spread between the Standard & Poor's BBB rated U.S. Bank Composite rate and LIBOR for the closest maturity term corresponding to the duration of the swaps to derive the CVA. A similar credit risk adjustment, correlated to the credit standing of the counterparty, is made when collateral posted by the counterparty does not fully cover their liability to the Bank. For further discussion on our methodology in valuing our derivative financial instruments, refer to Note 9, Derivative Financial Instruments and Hedging Activities.

Certain financial assets may be measured at fair value on a non-recurring basis. These assets are subject to fair value adjustments that result from the application of the lower of cost or fair value accounting or write-downs of individual assets, such as impaired loans that are collateral dependent and other real estate owned ("OREO"). As of June 30, 2018 and December 31, 2017, we did not carry any assets measured at fair value on a non-recurring basis.

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Disclosures about Fair Value of Financial Instruments

The following table summarizes fair value estimates for financial instruments as of June 30, 2018 and December 31, 2017, excluding financial instruments recorded at fair value on a recurring basis (summarized in the first table in this note). The carrying amounts in the following table are recorded in the consolidated statements of condition under the indicated captions. Further, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements such as bank-owned life insurance policies ("BOLI") and non-maturity deposit liabilities. Additionally, we hold shares of FHLB stock and Visa Inc. Class B common stock at cost. These shares are restricted from resale, except among member banks, and their values are discussed in Note 4, Investment Securities.

	June 30, 2018					December 31, 2017
(in thousands)	Carrying Amounts		Fair Value		Fair Value Hierarchy	Carrying Amounts		Fair Value		Fair Value Hierarchy
Financial assets (recorded at amortized cost)
Cash and cash equivalents	$	83,855	$	83,855	Level 1	$	203,545	$	203,545	Level 1
Investment securities held-to-maturity	170,652		166,127		Level 2	151,032		151,032		Level 2
Loans, net	1,701,798		1,666,409		Level 3	1,663,246		1,650,198		Level 3
Interest receivable	7,814		7,814		Level 2	7,501		7,501		Level 2
Financial liabilities (recorded at amortized cost)
Time deposits	137,040		136,023		Level 2	160,116		159,540		Level 2
Subordinated debentures	5,802		6,988		Level 3	5,739		5,118		Level 3
Interest payable	167		167		Level 2	191		191		Level 2

Commitments - The value of unrecognized financial instruments is estimated based on the fee income associated with the commitments which, in the absence of credit exposure, is considered to approximate their settlement value. The fair value of commitment fees was not material at June 30, 2018 and December 31, 2017.

Note 4:  Investment Securities

Our investment securities portfolio consists of obligations of state and political subdivisions, corporate bonds, U.S. government agency securities, including residential and commercial mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Small Business Administration ("SBA"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, and privately issued CMOs, as reflected in the following table.

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	June 30, 2018									December 31, 2017
	Amortized		Fair		Gross Unrealized					Amortized		Fair		Gross Unrealized
(in thousands)	Cost		Value		Gains		(Losses)			Cost		Value		Gains		(Losses)
Held-to-maturity:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	$	94,203	$	90,824	$	—	$	(3,379	)	$	100,376	$	100,096	$	234	$	(514	)
SBA-backed securities	8,882		8,743		—		(139		)	—		—		—		—
CMOs issued by FNMA	11,881		11,766		—		(115		)	—		—		—		—
CMOs issued by FHLMC	34,668		33,591		—		(1,077		)	31,010		30,938		2		(74		)
CMOs issued by GNMA	3,730		3,713		—		(17		)	—		—		—		—
Obligations of state and political subdivisions	17,288		17,490		235		(33		)	19,646		19,998		383		(31		)
Total held-to-maturity	170,652		166,127		235		(4,760		)	151,032		151,032		619		(619		)
Available-for-sale:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	90,082		87,590		17		(2,509		)	65,559		65,262		126		(423		)
SBA-backed securities	24,620		23,954		—		(666		)	25,979		25,982		58		(55		)
CMOs issued by FNMA	21,026		20,571		7		(462		)	35,340		35,125		33		(248		)
CMOs issued by FHLMC	123,359		120,411		1		(2,949		)	70,514		69,889		3		(628		)
CMOs issued by GNMA	12,641		12,222		2		(421		)	17,953		17,785		26		(194		)
Debentures of government- sponsored agencies	32,395		32,139		—		(256		)	12,940		12,938		3		(5		)
Privately issued CMOs	431		435		4		—			1,432		1,431		1		(2		)
Obligations of state and political subdivisions	89,699		87,788		77		(1,988		)	98,027		97,491		298		(834		)
Corporate bonds	3,015		3,027		24		(12		)	6,541		6,564		26		(3		)
Total available-for-sale	397,268		388,137		132		(9,263		)	334,285		332,467		574		(2,392		)
Total investment securities	$	567,920	$	554,264	$	367	$	(14,023	)	$	485,317	$	483,499	$	1,193	$	(3,011	)

The amortized cost andfair value of investment debt securities by contractual maturity at June 30, 2018 and December 31, 2017 are shown in the following table. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties.

	June 30, 2018								December 31, 2017
	Held-to-Maturity				Available-for-Sale				Held-to-Maturity				Available-for-Sale
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Within one year	$	2,859	$	2,882	$	8,272	$	8,263	$	2,151	$	2,172	$	10,268	$	10,272
After one but within five years	13,063		13,147		79,662		78,514		15,577		15,791		71,576		71,237
After five years through ten years	63,321		61,350		216,584		210,650		54,641		54,554		129,723		128,954
After ten years	91,409		88,748		92,750		90,710		78,663		78,515		122,718		122,004
Total	$	170,652	$	166,127	$	397,268	$	388,137	$	151,032	$	151,032	$	334,285	$	332,467

Sales of investment securities and gross gains and losses are shown in the following table.

	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Available-for-sale:
Sales proceeds	$	5,006		$	1,321		$	5,006		$	1,321
Gross realized gains	27			13			27			13
Gross realized losses	(16		)	(3		)	(16		)	(3		)

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Pledged investment securities are shown in the following table.

(in thousands)	June 30, 2018		December 31, 2017
Pledged to the State of California:
Secure public deposits in compliance with the Local Agency Security Program	$	103,097	$	107,829
Collateral for trust deposits	749		761
Total investment securities pledged to the State of California	$	103,846	$	108,590
Collateral for Wealth Management and Trust Services checking account	$	2,014	$	2,026

As part of our ongoing review of our investment securities portfolio, we reassessed the classification of certain securities issued by government sponsored agencies. During 2018 and 2017, we transferred $27.4 million and $129.0 million, respectively, of these securities from available-for-sale to held-to-maturity at fair value. We intend and have the ability to hold these securities to maturity. The net unrealized pre-tax loss of $278 thousand and $3.0 million, at the respective transfer dates, remained in accumulated other comprehensive income and are amortized over the remaining lives of the securities. Amortization of the net unrealized pre-tax losses totaled $268 thousand and $165 thousand for the six months ended June 30, 2018 and 2017, respectively.

Other-Than-Temporarily Impaired ("OTTI") Debt Securities

We have evaluated the credit of our investment securities and their issuers and/or insurers. Based on our evaluation, Management has determined that no investment security in our investment portfolio is other-than-temporarily impaired as of June 30, 2018. We do not have the intent and it is more likely than not that we will not have to sell the remaining securities temporarily impaired at June 30, 2018 before recovery of the amortized cost basis.

There were 266 and 198investment securities in unrealized loss positions at June 30, 2018 and December 31, 2017, respectively. Those securities are summarized and classified according to the duration of the loss period in the following tables:

June 30, 2018	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
MBS pass-through securities issued by FHLMC and FNMA	$	22,100	$	(830	)	$	68,724	$	(2,549	)	$	90,824	$	(3,379	)
SBA-backed securities	8,742		(139		)	—		—			$	8,742	$	(139	)
CMOs issued by FNMA	11,766		(115		)	—		—			11,766		(115		)
CMOs issued by FHLMC	19,798		(564		)	13,793		(513		)	33,591		(1,077		)
CMOs issued by GNMA	—		—			3,713		(17		)	3,713		(17		)
Obligations of state and political subdivisions	3,816		(33		)	—		—			3,816		(33		)
Total held-to-maturity	66,222		(1,681		)	86,230		(3,079		)	152,452		(4,760		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	68,906		(1,843		)	17,713		(666		)	86,619		(2,509		)
SBA-backed securities	23,954		(666		)	—		—			23,954		(666		)
CMOs issued by FNMA	15,687		(321		)	4,642		(141		)	20,329		(462		)
CMOs issued by FHLMC	115,370		(2,949		)	—		—			115,370		(2,949		)
CMOs issued by GNMA	11,297		(419		)	603		(2		)	11,900		(421		)
Debentures of government- sponsored agencies	32,139		(256		)	—		—			32,139		(256		)
Privately issued CMOs	—		—			—		—			—		—
Obligations of state and political subdivisions	57,217		(835		)	18,832		(1,153		)	76,049		(1,988		)
Corporate bonds	1,522		(12		)	—		—			1,522		(12		)
Total available-for-sale	326,092		(7,301		)	41,790		(1,962		)	367,882		(9,263		)
Total temporarily impaired securities	$	392,314	$	(8,982	)	$	128,020	$	(5,041	)	$	520,334	$	(14,023	)

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December 31, 2017	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
Obligations of state and political subdivisions	$	3,648	$	(31	)	$	—	$	—		$	3,648	$	(31	)
MBS pass-through securities issued by FHLMC and FNMA	16,337		(143		)	46,845		(371		)	63,182		(514		)
CMOs issued by FHLMC	11,066		(31		)	13,824		(43		)	24,890		(74		)
Total held-to-maturity	31,051		(205		)	60,669		(414		)	91,720		(619		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	32,189		(121		)	15,325		(302		)	47,514		(423		)
SBA-backed securities	11,028		(53		)	165		(2		)	11,193		(55		)
CMOs issued by FNMA	26,401		(171		)	5,440		(77		)	31,841		(248		)
CMOs issued by FHLMC	69,276		(628		)	—		—			69,276		(628		)
CMOs issued by GNMA	14,230		(194		)	—		—			14,230		(194		)
Debentures of government- sponsored agencies	2,984		(5		)	—		—			2,984		(5		)
Privately issued CMO's	1,310		(2		)	—		—			1,310		(2		)
Obligations of state and political subdivisions	52,197		(288		)	19,548		(546		)	71,745		(834		)
Corporate bonds	3,060		(3		)	—		—			3,060		(3		)
Total available-for-sale	212,675		(1,465		)	40,478		(927		)	253,153		(2,392		)
Total temporarily impaired securities	$	243,726	$	(1,670	)	$	101,147	$	(1,341	)	$	344,873	$	(3,011	)

As of June 30, 2018, sixty-four investment securities in our portfolio had been in a continuous loss position for twelve months or more. They consisted of five CMOs issued by FHLMC, three CMOs issued by FNMA, two CMOs issued by GNMA, twenty-two agency MBS securities and thirty-two obligations of U.S. state and political subdivisions securities. We have evaluated the securities and believe that the decline in fair value is primarily driven by factors other than credit. It is probable that we will be able to collect all amounts due according to the contractual terms and no other-than-temporary impairment exists on these securities. The debenture of government-sponsored agency security is supported by the U.S. Federal Government, which protects us from credit losses. Based upon our assessment of the credit fundamentals, we concluded that these securities were not other-than-temporarily impaired at June 30, 2018.

There were two hundred one investment securities in our portfolio that had been in temporary loss positions for less than twelve months as of June 30, 2018, and their temporary loss positions mainly arose from changes in interest rates since purchase. They consisted of eleven SBA-backed securities, eight debentures of a U.S. government-sponsored agency, ninety-eight obligations of U.S. state and political subdivisions, thirty-six MBS securities, forty-six CMOs issued by government-sponsored agencies, and three corporate bonds. Securities of government-sponsored agencies are supported by the U.S. Federal Government, which protects us from credit losses. Other temporarily impaired securities are deemed creditworthy after internal analysis of the issuers' latest financial information and credit enhancement. Additionally, all are rated as investment grade by at least one major rating agency. As a result of this impairment analysis, we concluded that these securities were not other-than-temporarily impaired at June 30, 2018.

Non-Marketable Securities

As a member of the FHLB, we are required to maintain a minimum investment in FHLB capital stock determined by the Board of Directors of the FHLB. The minimum investment requirements can increase in the event we increase our total asset size or borrowings with the FHLB. Shares cannot be purchased or sold except between the FHLB and its members at the $100 per share par value. We held $11.1 million of FHLB stock recorded at cost in other assets in the consolidated statements of condition at both June 30, 2018 and December 31, 2017. The carrying amounts of these investments are reasonable estimates of fair value because the securities are restricted to member banks and they do not have a readily determinable market value. Management does not believe that the FHLB stock is other-than-temporarily-impaired, due to FHLB's current financial condition. On July 26, 2018, FHLB announced a cash

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dividend to be distributed in mid-August 2018 at an annualized dividend rate of 7.00%. Cash dividends paid on FHLB capital stock are recorded as non-interest income.

As a member bank of Visa U.S.A., we hold 16,939 shares of Visa Inc. Class B common stock with a carrying value of zero, which is equal to our cost basis. These shares are restricted from resale until their conversion into Class A (voting) shares upon the termination of Visa Inc.'s Covered Litigation escrow account. Because of the restriction, these shares are not considered available-for-sale and are not carried at fair value. When converting this Class B common stock to Class A common stock based on the conversion rate of 1.6298 as of June 30, 2018 and 1.6483 as of December 31, 2017, and the closing stock price of Class A shares, the value of our shares of Class B common stock would have been $3.7 million and $3.2 million at June 30, 2018 and December 31, 2017, respectively. The conversion rate is subject to further reduction upon the final settlement of the covered litigation against Visa Inc. and its member banks. As such, the fair value of these Class B shares can differ significantly from their if-converted values. For further information, refer to Note 8, Commitments and Contingencies.

We invest in low-income housing tax credit funds as a limited partner, which totaled $4.9 million and $2.1 million recorded in other assets as of June 30, 2018 and December 31, 2017, respectively. In the first six months of 2018, we recognized $282 thousand of low-income housing tax credits and other tax benefits, net of $237 thousand of amortization expense of low-income housing tax credit investment, as a component of income tax expense. As of June 30, 2018, our unfunded commitments for these low-income housing tax credit funds totaled $3.2 million. We did not recognize any impairment losses on these low-income housing tax credit investments during the six months ended June 30, 2018 or 2017, as the value of the future tax benefits exceeds the carrying value of the investments.

Note 5:  Loans and Allowance for Loan Losses

Credit Quality of Loans

The following table shows outstanding loans by class and payment aging as of June 30, 2018 and December 31, 2017.

Loan Aging Analysis by Loan Class
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential 1		Installment and other consumer		Total
June 30, 2018
30-59 days past due	$	—	$	—	$	—	$	—	$	77	$	—	$	11	$	88
60-89 days past due	—		—		—		—		—		—		—		—
90 days or more past due	—		—		—		—		—		—		—		—
Total past due	—		—		—		—		77		—		11		88
Current	241,994		317,587		839,667		57,015		125,954		108,829		26,477		1,717,523
Total loans 3	$	241,994	$	317,587	$	839,667	$	57,015	$	126,031	$	108,829	$	26,488	$	1,717,611
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	385	$	—	$	—	$	385
December 31, 2017
30-59 days past due	$	—	$	—	$	—	$	—	$	99	$	255	$	330	$	684
60-89 days past due	1,340		—		—		—		—		—		—		1,340
90 days or more past due	—		—		—		—		307		—		—		307
Total past due	1,340		—		—		—		406		255		330		2,331
Current	234,495		300,963		822,984		63,828		132,061		95,271		27,080		1,676,682
Total loans 3	$	235,835	$	300,963	$	822,984	$	63,828	$	132,467	$	95,526	$	27,410	$	1,679,013
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	406	$	—	$	—	$	406

¹ Our residential loan portfolio does not include sub-prime loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages", the characteristics of which are loans lacking full documentation, borrowers having low FICO scores or higher loan-to-value ratios.

²One purchased credit impaired ("PCI") loan with an unpaid balance of $6 thousand and no carrying value was not accreting interest at June 30, 2018. Three PCI loans with unpaid balances totaling $131 thousand and no carrying values were not accreting interest at December 31, 2017. Amounts exclude accreting PCI loans totaling $2.1 million at both June 30, 2018 and December 31, 2017 as we have a reasonable expectation about future cash flows to be collected and we continue to recognize accretable yield on these loans in interest income. There were no accruing loans past due more than ninety days at June 30, 2018 or December 31, 2017.

³ Amounts include net deferred loan origination costs of $800 thousand and $818 thousand at June 30, 2018 and December 31, 2017, respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $956 thousand and $1.2 million at June 30, 2018 and December 31, 2017, respectively.

We generally make commercial loans to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and acquisitions.  Management examines historical, current, and projected cash flows to determine the ability of the borrower to repay obligations as agreed. Commercial loans

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are made based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral and guarantor support. The cash flows of borrowers, however, may not occur as expected, and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed, such as accounts receivable and inventory, and typically include personal guarantees. We target stable businesses with guarantors who provide additional sources of repayment and have proven to be resilient in periods of economic stress.

Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans discussed above. We underwrite these loans to be repaid from cash flow and to be supported by real property collateral. Underwriting standards for commercial real estate loans include, but are not limited to, debt coverage and loan-to-value ratios. Furthermore, the owners of the properties guarantee substantially all of our commercial real estate loans.  Conditions in the real estate markets or in the general economy may adversely affect our commercial real estate loans. In the event of a vacancy, we expect guarantors to carry the loans until they find a replacement tenant.  The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio.

We generally make construction loans to developers and builders to finance construction, renovation and occasionally land acquisitions in anticipation of near-term development. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. Significant events can affect the construction industry, including: the inherent volatility of real estate markets and vulnerability to delays due to weather, change orders, inability to obtain construction permits, labor or material shortages, and price changes. Estimates of construction costs and value associated with the completed project may be inaccurate. Repayment of construction loans is largely dependent on the ultimate success of the project.

Consumer loans primarily consist of home equity lines of credit, other residential loans and floating homes, along with a small number of installment loans. Our other residential loans include tenancy-in-common fractional interest loans ("TIC") located almost entirely in San Francisco County. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification among consumer loan types, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk.

We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and in the loan portfolio. Our definitions of “Special Mention” risk graded loans, or worse, are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC").  Our internally assigned grades are as follows:

Pass and Watch: Loans to borrowers of acceptable or better credit quality. Borrowers in this category demonstrate fundamentally sound financial positions, repayment capacity, credit history, and management expertise.  Loans in this category must have an identifiable and stable source of repayment and meet the Bank’s policy regarding debt-service-coverage ratios.  These borrowers are capable of sustaining normal economic, market or operational setbacks without significant financial consequences.  Negative external industry factors are generally not present.  The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period.

Special Mention: Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification.

Substandard: Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies.

Doubtful: Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on non-accrual status and usually are collateral-dependent.

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We regularly review our credits for accuracy of risk grades whenever we receive new information. Borrowers are generally required to submit financial information at regular intervals. Typically, commercial borrowers with lines of credit are required to submit financial information with reporting intervals ranging from monthly to annually depending on credit size, risk and complexity. In addition, investor commercial real estate borrowers are usually required to submit rent rolls or property income statements annually. We monitor construction loans monthly and review them on an ongoing basis. We review home equity and other consumer loans based on delinquency status. We also review loans graded “Watch” or worse, regardless of loan type, no less than quarterly.

The following table represents an analysis of the carrying amount in loans, net of deferred fees and costs and purchase premiums or discounts, by internally assigned risk grades, including PCI loans, at June 30, 2018 and December 31, 2017.

Credit Risk Profile by Internally Assigned Risk Grade
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Purchased credit-impaired		Total
June 30, 2018
Pass	$	224,707	$	299,469	$	836,634	$	54,324	$	124,103	$	108,829	$	26,389	$	2,140	$	1,676,595
Special Mention	14,842		8,904		2,232		—		1,121		—		—		—		27,099
Substandard	2,403		8,005		—		2,691		719		—		99		—		13,917
Total loans	$	241,952	$	316,378	$	838,866	$	57,015	$	125,943	$	108,829	$	26,488	$	2,140	$	1,717,611
December 31, 2017
Pass	$	214,636	$	281,104	$	818,570	$	60,859	$	130,558	$	95,526	$	27,287	$	1,325	$	1,629,865
Special Mention	9,318		9,284		1,850		—		—		—		—		790		21,242
Substandard	11,816		9,409		1,774		2,969		1,815		—		123		—		27,906
Total loans	$	235,770	$	299,797	$	822,194	$	63,828	$	132,373	$	95,526	$	27,410	$	2,115	$	1,679,013

Troubled Debt Restructuring

Our loan portfolio includes certain loans modified in a troubled debt restructuring (“TDR”), where we have granted economic concessions to borrowers experiencing financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. TDRs on non-accrual status at the time of restructure may be returned to accruing status after Management considers the borrower’s sustained repayment performance for a reasonable period, generally six months, and obtains reasonable assurance of repayment and performance.

We may remove a loan from TDR designation if it meets all of the following conditions:

• The loan is subsequently refinanced or restructured at current market interest rates and the new terms are consistent with the treatment of creditworthy borrowers under regular underwriting standards;

• The borrower is no longer considered to be in financial difficulty;

• Performance on the loan is reasonably assured; and;

• Existing loan did not have any forgiveness of principal or interest.

The same Management level that approved the upgrading of the loan classification must approve the removal of TDR status. During the six months ended June 30, 2018, one TIC loan with a recorded investment of $150 thousand was removed from TDR designation after meeting all of the conditions noted above. There were no loans removed from TDR designation during 2017.

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The following table summarizes the carrying amount of TDR loans by loan class as of June 30, 2018 and December 31, 2017.

(in thousands)
Recorded investment in Troubled Debt Restructurings 1	June 30, 2018		December 31, 2017
Commercial and industrial	$	1,917	$	2,165
Commercial real estate, owner-occupied	7,002		6,999
Commercial real estate, investor	1,844		2,171
Construction	2,691		2,969
Home equity	348		347
Other residential	988		1,148
Installment and other consumer	704		721
Total	$	15,494	$	16,520

¹ There were no TDR loans on non-accrual status at June 30, 2018 and December 31, 2017.

The following table presents information for loans modified in a TDR during the presented periods, including the number of modified contracts, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented.

(dollars in thousands)	Number of Contracts Modified	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment at Period End
TDRs during the three months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the three months ended June 30, 2017:
None	—	$	—	$	—	$	—

TDRs during the six months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the six months ended June 30, 2017:
Installment and consumer	1	$	50	$	50	$	49

The two loans that were modified during the six months ended June 30, 2018 were to the same borrower and included loan extensions and other changes in loan terms. The modification during the six months endedJune 30, 2017 primarily involved an interest rate concession and other changes to loan terms. During the first six months of 2018 and 2017, there were no defaults on loans that had been modified in a TDR within the prior twelve-month period. We report defaulted TDRs based on a payment default definition of more than ninety days past due.

Impaired Loans

The following tables summarize information by class on impaired loans and their related allowances. Total impaired loans include non-accrual loans, accruing TDR loans and accreting PCI loans that have experienced post-acquisition declines in cash flows expected to be collected.

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(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
June 30, 2018
Recorded investment in impaired loans:
With no specific allowance recorded	$	306	$	—	$	—	$	2,691	$	385	$	989	$	46	$	4,417
With a specific allowance recorded	1,611		7,002		1,844		—		347		—		658		11,462
Total recorded investment in impaired loans	$	1,917	$	7,002	$	1,844	$	2,691	$	732	$	989	$	704	$	15,879
Unpaid principal balance of impaired loans	$	1,905	$	6,993	$	1,837	$	2,688	$	729	$	987	$	703	$	15,842
Specific allowance	232		126		47		—		6		—		92		503
Average recorded investment in impaired loans during the quarter ended June 30, 2018	2,092		7,005		1,849		2,833		736		990		708		16,213
Interest income recognized on impaired loans during the quarter ended June 30, 20181	28		66		20		37		5		13		8		177
Average recorded investment in impaired loans during the six months ended June 30, 2018	2,104		7,003		1,956		2,878		742		1,043		712		16,438
Interest income recognized on impaired loans during the six months ended June 30, 2018 1	183		132		42		75		10		26		15		483
Average recorded investment in impaired loans during the quarter ended June 30, 2017	2,072		7,000		3,283		3,240		642		1,173		943		18,353
Interest income recognized on impaired loans during the quarter ended June 30, 20171	25		66		20		37		7		14		10		179
Average recorded investment in impaired loans during the six months ended June 30, 2017	2,117		6,998		2,941		3,241		667		1,437		939		18,340
Interest income recognized on impaired loans during the six months ended June 30, 2017 1	48		132		43		71		14		34		20		362

¹ No interest income on impaired loans was recognized on a cash basis during the three months ended June 30, 2018. Interest income recognized on a cash basis totaled $128 thousand during the six months ended June 30, 2018 and was primarily related to the pay-off of two non-accrual commercial PCI loans. No interest income on impaired loans was recognized on a cash basis during the three and six months ended June 30, 2017.

(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
December 31, 2017
Recorded investment in impaired loans:
With no specific allowance recorded	$	309	$	—	$	—	$	2,689	$	406	$	995	$	46	$	4,445
With a specific allowance recorded	1,856		6,999		2,171		280		347		153		675		12,481
Total recorded investment in impaired loans	$	2,165	$	6,999	$	2,171	$	2,969	$	753	$	1,148	$	721	$	16,926
Unpaid principal balance of impaired loans	$	2,278	$	6,993	$	2,168	$	2,963	$	750	$	1,147	$	720	$	17,019
Specific allowance	$	50	$	188	$	159	$	7	$	6	$	1	$	102	$	513

Management monitors delinquent loans continuously and identifies problem loans, generally loans graded Substandard or worse, loans on non-accrual status and loans modified in a TDR, to be evaluated individually for impairment. Generally, the recorded investment in impaired loans is net of any charge-offs from estimated losses related to specifically identified impaired loans when they are deemed uncollectible. There were no charged-off amounts on impaired loans at June 30, 2018 or December 31, 2017. In addition, the recorded investment in impaired loans is net of purchase discounts or premiums on acquired loans and deferred fees and costs. At June 30, 2018 and December 31, 2017, unused commitments to extend credit on impaired loans, including performing loans to borrowers whose terms have been modified in TDRs, totaled $850 thousand and $935 thousand, respectively.

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The following tables disclose activity in the allowance for loan losses ("ALLL") and the recorded investment in loans by class, as well as the related ALLL disaggregated by impairment evaluation method.

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Three months ended June 30, 2018
Beginning balance	$	3,693		$	2,080	$	6,455		$	697		$	979		$	543	$	351		$	973		$	15,771
Provision (reversal)	(1,098		)	259		935			(189		)	(27		)	203		(66		)	(17		)	—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	5			—		—			—			—			—		42			—			47
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Three months ended June 30, 2017
Beginning balance	$	4,413		$	1,992	$	6,133		$	546		$	990		$	444	$	359		$	342		$	15,219
Provision (reversal)	(490		)	90		(68		)	(135		)	(9		)	65		(23		)	570			—
Charge-offs	—			—		—			—			—			—		—			—			—
Recoveries	9			—		—			—			—			—		4			—			13
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Six months ended June 30, 2018
Allowance for loan losses:
Beginning balance	$	3,654		$	2,294	$	6,475		$	681		$	1,031		$	536	$	378		$	718		$	15,767
Provision (reversal)	(1,063		)	45		915			(173		)	(79		)	210		(93		)	238			—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	9			—		—			—			—			—		42			—			51
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Six months ended June 30, 2017
Allowance for loan losses:
Beginning balance	$	3,248		$	1,753	$	6,320		$	781		$	973		$	454	$	372		$	1,541		$	15,442
Provision (reversal)	896			329		(255		)	(370		)	8			55		(34		)	(629		)	—
Charge-offs	(284		)	—		—			—			—			—		(3		)	—			(287		)
Recoveries	72			—		—			—			—			—		5			—			77
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

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Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
June 30, 2018
Ending ALLL related to loans collectively evaluated for impairment	$	2,365		$	2,213		$	7,343		$	508		$	946		$	746		$	233		$	956	$	15,310
Ending ALLL related to loans individually evaluated for impairment	232			126			47			—			6			—			92			—		503
Ending ALLL related to purchased credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	2,597		$	2,339		$	7,390		$	508		$	952		$	746		$	325		$	956	$	15,813
Recorded Investment:
Collectively evaluated for impairment	$	240,035		$	309,376		$	837,022		$	54,324		$	125,211		$	107,840		$	25,784		$	—	$	1,699,592
Individually evaluated for impairment	1,917			7,002			1,844			2,691			732			989			704			—		15,879
Purchased credit-impaired	42			1,209			801			—			88			—			—			—		2,140
Total	$	241,994		$	317,587		$	839,667		$	57,015		$	126,031		$	108,829		$	26,488		$	—	$	1,717,611
Ratio of allowance for loan losses to total loans	1.07		%	0.74		%	0.88		%	0.89		%	0.76		%	0.69		%	1.23		%	NM		0.92		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			247		%	NM			NM			NM		4,107		%

NM - Not Meaningful

Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
December 31, 2017
Ending ALLL related to loans collectively evaluated for impairment	$	3,604		$	2,106		$	6,316		$	674		$	1,025		$	535		$	276		$	718	$	15,254
Ending ALLL related to loans individually evaluated for impairment	50			188			159			7			6			1			102			—		513
Ending ALLL related to purchased  credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	3,654		$	2,294		$	6,475		$	681		$	1,031		$	536		$	378		$	718	$	15,767
Recorded Investment:
Collectively evaluated for impairment	$	233,605		$	292,798		$	820,023		$	60,859		$	131,620		$	94,378		$	26,689		$	—	$	1,659,972
Individually evaluated for impairment	2,165			6,999			2,171			2,969			753			1,148			721			—		16,926
Purchased credit-impaired	65			1,166			790			—			94			—			—			—		2,115
Total	$	235,835		$	300,963		$	822,984		$	63,828		$	132,467		$	95,526		$	27,410		$	—	$	1,679,013
Ratio of allowance for loan losses to total loans	1.55		%	0.76		%	0.79		%	1.07		%	0.78		%	0.56		%	1.38		%	NM		0.94		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			254		%	NM			NM			NM		3,883		%

NM - Not Meaningful

Purchased Credit-Impaired Loans

Acquired loans are considered credit-impaired if there is evidence of significant deterioration of credit quality since origination and it is probable, at the acquisition date, that we will be unable to collect all contractually required payments receivable. Management has determined certain loans purchased in our three bank acquisitions to be PCI loans based on credit indicators such as nonaccrual status, past due status, loan risk grade, loan-to-value ratio, etc. Revolving credit agreements (e.g., home equity lines of credit and revolving commercial loans) are not considered PCI loans as cash flows cannot be reasonably estimated.

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The following table reflects the unpaid principal balance and related carrying value of PCI loans.

PCI Loans	June 30, 2018				December 31, 2017
(in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial and industrial	$	125	$	42	$	276	$	65
Commercial real estate, owner occupied	1,271		1,209		1,297		1,166
Commercial real estate, investor	1,049		801		1,064		790
Home equity	220		88		231		94
Total purchased credit-impaired loans	$	2,665	$	2,140	$	2,868	$	2,115

The activities in the accretable yield, or income expected to be earned over the remaining lives of the PCI loans were as follows:

Accretable Yield	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at beginning of period	$	1,142		$	1,386		$	1,254		$	1,476
Accretion	(83		)	(80		)	(195		)	(170		)
Balance at end of period	$	1,059		$	1,306		$	1,059		$	1,306

Pledged Loans

Our FHLB line of credit is secured under terms of a blanket collateral agreement by a pledge of certain qualifying loans with unpaid principal balances of $996.9 million and $887.9 million at June 30, 2018 and December 31, 2017, respectively. In addition, we pledge a certain residential loan portfolio, which totaled $80.0 million and $67.6 million at June 30, 2018 and December 31, 2017, respectively, to secure our borrowing capacity with the Federal Reserve Bank ("FRB"). Also, see Note 6, Borrowings.

Related Party Loans

The Bank has, and expects to have in the future, banking transactions in the ordinary course of its business with directors, officers, principal shareholders and their businesses or associates. These transactions, including loans, are granted on substantially the same terms, including interest rates and collateral on loans, as those prevailing at the same time for comparable transactions with persons not related to us. Likewise, these transactions do not involve more than the normal risk of collectability or present other unfavorable features. Related party loans totaled $12.3 million at June 30, 2018 compared to $11.9 million at December 31, 2017. In addition, undisbursed commitments to related parties totaled $8.6 million and $9.1 million at June 30, 2018 and December 31, 2017, respectively.

Note 6: Borrowings

Federal Funds Purchased – The Bank had unsecured lines of credit with correspondent banks for overnight borrowing totaling $92.0 million at June 30, 2018 and $100.4 million at December 31, 2017.  In general, interest rates on these lines approximate the federal funds target rate. We had no overnight borrowings under these credit facilities at June 30, 2018 or December 31, 2017.

Federal Home Loan Bank Borrowings – As of June 30, 2018 and December 31, 2017, the Bank had lines of credit with the FHLB totaling $627.4 million and $538.9 million, respectively, based on eligible collateral of certain loans. There were no FHLB overnight borrowings at June 30, 2018or December 31, 2017.

Federal Reserve Line of Credit – The Bank has a line of credit with the FRBSF secured by certain residential loans.  At June 30, 2018 and December 31, 2017, the Bank had borrowing capacity under this line totaling $59.5 million and $52.1 million, respectively, and had no outstanding borrowings with the FRBSF.

As part of an acquisition, Bancorp assumed two subordinated debentures due to NorCal Community Bancorp Trusts I and II (the "Trusts"), established for the sole purpose of issuing trust preferred securities on September 22, 2003 and December 29, 2005, respectively. The subordinated debentures were recorded at fair values totaling $4.95 million at acquisition date with contractual values totaling $8.2 million. The difference between the contractual balance and the fair value at acquisition date is accreted into interest expense over the lives of the debentures. Accretion on the subordinated debentures totaled $63 thousand and $80 thousand in the first six months of 2018 and 2017, respectively.

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Bancorp has the option to defer payment of the interest on the subordinated debentures for a period of up to five years, as long as there is no default on the subordinated debentures. In the event of interest deferral, dividends to Bancorp common stockholders are prohibited. The trust preferred securities were sold and issued in private transactions pursuant to an exemption from registration under the Securities Act of 1933, as amended. Bancorp has guaranteed, on a subordinated basis, distributions and other payments due on trust preferred securities totaling $8.0 million issued by the Trusts, which have identical maturity, repricing, and payment terms as the subordinated debentures.

The following table summarizes the contractual terms of the subordinated debentures due to the Trusts as of June 30, 2018:

(in thousands)
Subordinated debentures due to NorCal Community Bancorp Trust I on October 7, 2033 with interest payable quarterly, based on 3-month LIBOR plus 3.05%, repricing quarterly (5.40% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	$	4,124
Subordinated debentures due to NorCal Community Bancorp Trust II on March 15, 2036 with interest payable quarterly, based on 3-month LIBOR plus 1.40%, repricing quarterly (3.74% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	4,124
Total	$	8,248

Note 7:  Stockholders' Equity

Dividends

The following table summarizes cash dividends paid to common shareholders, recorded as a reduction of retained earnings.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Cash dividends to common stockholders	$	2,166	$	1,660	$	4,181	$	3,315
Cash dividends per common share	$	0.31	$	0.27	$	0.60	$	0.54

On July 20, 2018, the Board of Directors declared a $0.32 per share cash dividend, payable on August 10, 2018 to shareholders of record at the close of business on August 3, 2018.

Share-Based Payments

The fair value of stock options as of the grant date is recorded as stock-based compensation expense in the consolidated statements of comprehensive income over the requisite service period, which is generally the vesting period, with a corresponding increase in common stock. Stock-based compensation also includes compensation expense related to the issuance of restricted stock awards. The fair value of the restricted stock awards on the grant date, which equals the intrinsic value, is recorded as compensation expense over the requisite service period with a corresponding increase in common stock as the shares vest. Stock option and restricted stock awards issued in 2018 include a retirement eligibility clause whereby the requisite service period is satisfied at the retirement eligibility date. For those awards, we accelerate stock-based compensation if the award holder is eligible to retire. However, retirement eligibility does not affect the legal vesting schedule of the awards.

Performance-based stock awards (restricted stock awards) are issued to a selected group of employees. Stock award vesting is contingent upon the achievement of pre-established long-term performance goals set by the Compensation Committee of the Board of Directors. Performance is measured over a three-year period and the stock awards cliff vest. These performance-based stock awards were granted at a maximum opportunity level, and based on the achievement of the pre-established goals, the actual payouts can range from 0% to 200% of the target award. For performance-based stock awards, an estimate is made of the number of shares expected to vest based on the probability that the performance criteria will be achieved to determine the amount of compensation expense to be recognized. The estimate is re-evaluated quarterly and total compensation expense is adjusted for any change in the current period.

In addition, we record excess tax benefits (deficiencies) resulting from the exercise of non-qualified stock options, the disqualifying disposition of incentive stock options and vesting of restricted stock awards as income tax benefits

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(expense) in the consolidated statements of comprehensive income with a corresponding decrease (increase) to current taxes payable.

The holders of unvested restricted stock awards are entitled to dividends on the same per-share ratio as holders of common stock. Tax benefits on dividends paid on unvested restricted stock awards are recorded as tax benefits in the consolidated statements of comprehensive income with a corresponding decrease to current taxes payable.

Under the 2017 Equity Plan, stock options may be net settled by a reduction in the number of shares otherwise deliverable upon exercise in satisfaction of the exercise payment and applicable tax withholding requirements. During the six months ended June 30, 2018, option holders exchanged 19,863 shares totaling $1.4 million at a weighted-average price of $70.34 for cashless stock option exercises and tax withholdings upon vesting of performance-based stock awards. During the six months ended June 30, 2017, option holders exchanged 5,651 shares totaling $385 thousand at a weighted-average price of $68.04 for cashless stock option exercises. Shares exchanged under net settlement arrangements are available for future grants under the 2017 Equity Plan.

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

We early adopted ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the first quarter of 2018 and reclassified $638 thousand from AOCI to retained earnings. This amount represents the stranded income tax effects related to the unrealized loss on available-for-sale securities in AOCI on the date of the enactment of the Tax Cuts and Jobs Act of 2017. For more information regarding ASU No. 2018-02, refer to Note 2, Accounting Standards Adopted in 2018.

Share Repurchase Program

On April 23, 2018, Bancorp announced that its Board of Directors approved a Share Repurchase Program under which Bancorp may repurchase up to $25.0 million of its outstanding common stock through May 1, 2019.

Under the Share Repurchase Program, Bancorp may purchase shares of its common stock through various means such as open market transactions, including block purchases, and privately negotiated transactions. The number of shares repurchased and the timing, manner, price and amount of any repurchases will be determined at Bancorp's discretion. Factors include, but are not limited to, stock price, trading volume and general market conditions, along with Bancorp’s general business conditions. The program may be suspended or discontinued at any time and does not obligate Bancorp to acquire any specific number of shares of its common stock.

As part of the Share Repurchase Program, Bancorp entered into a trading plan adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The 10b5-1 trading plan permits common stock to be repurchased at times that might otherwise be prohibited under insider trading laws or self-imposed trading restrictions. The 10b5-1 trading plan is administered by an independent broker and is subject to price, market volume and timing restrictions.

During the quarter ended June 30, 2018, Bancorp purchased 1,398 shares for a total amount of $104 thousand.

Note 8:  Commitments and Contingencies

Financial Instruments with Off-Balance Sheet Risk

We make commitments to extend credit in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit in the form of loans or through standby letters of credit. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Because various commitments will expire without being fully drawn, the total commitment amount does not necessarily represent future cash requirements.

Our credit loss exposure is equal to the contractual amount of the commitment in the event of nonperformance by the borrower. We use the same credit underwriting criteria for all credit exposure. The amount of collateral obtained, if deemed necessary by us, is based on Management's credit evaluation of the borrower. Collateral types pledged may include accounts receivable, inventory, other personal property and real property.

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The contractual amount of undrawn loan commitments and standby letters of credit not reflected in the consolidated statements of condition are as follows:

(in thousands)	June 30, 2018		December 31, 2017
Commercial lines of credit	$	222,547	$	224,370
Revolving home equity lines	186,652		177,678
Undisbursed construction loans	34,336		35,322
Personal and other lines of credit	12,408		11,758
Standby letters of credit	2,207		4,074
Total commitments and standby letters of credit	$	458,150	$	453,202

We record an allowance for losses on these off-balance sheet commitments based on an estimate of probabilities of the utilization of these commitments according to our historical experience on different types of commitments and expected loss. The allowance for losses on off-balance sheet commitments totaled $958 thousand as of June 30, 2018 and December 31, 2017, which is recorded in interest payable and other liabilities in the consolidated statements of condition.

Operating Leases

We rent certain premises under long-term, non-cancelable operating leases expiring at various dates through the year 2032. Most of the leases contain certain renewal options and escalation clauses. At June 30, 2018, the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows:

(in thousands)	2018		2019		2020		2021		2022		Thereafter		Total
Operating leases	$	2,209	$	4,198	$	3,758	$	2,138	$	1,330	$	2,904	$	16,537

Rent expense included in occupancy expense totaled $1.2 million and $1.0 million for the three months ended June 30, 2018 and 2017, respectively. Rent expense totaled $2.3 million and $2.0 million for the six months ended June 30, 2018 and 2017, respectively.

Litigation Matters

We may be party to legal actions that arise from time to time during the normal course of business.  We believe, after consultation with legal counsel, that litigation contingent liability, if any, would not have a material adverse effect on our consolidated financial position, results of operations, or cash flows.

The Bank is responsible for a proportionate share of certain litigation indemnifications provided to Visa U.S.A. ("Visa") by its member banks in connection with lawsuits related to anti-trust charges and interchange fees ("Covered Litigation"). The outcome of the Covered Litigation affects the conversion rate of Visa Class B common stock held by us to Visa Class A common stock, as discussed in Note 4, Investment Securities. The conversion rate may decrease if Visa makes more Covered Litigation settlement payments in the future, and the full effect on member banks is still uncertain. Presently, we are not aware of any significant future cash settlement payments required by the Bank on the Covered Litigation.

In 2012, Visa had reached a $4.0 billion interchange multidistrict litigation class settlement agreement for which it maintains an escrow account to be used for settlements or judgments in the Covered Litigation. Based on progress in recent settlement discussions in the U.S. interchange multi-district litigation, Visa recorded a $600 million litigation provision in the quarter ended June 30, 2018 and on June 28, Visa deposited an additional $600 million into the litigation escrow under the terms of the U.S. retrospective responsibility plan. Funding of the escrow triggers a conversion rate reduction of the Class B common stock to shares of Class A common stock. At June 30, 2018, according to Visa's Form 10-Q filed on July 27, 2018, the escrow account balance was $1.5 billion. As of the date of Visa's filing, it had reached settlement agreements with individual merchants representing 51% of the Visa-branded payment card sales volume of merchants who opted out of the 2012 settlement agreement. Litigation is ongoing and until the appeal process is complete, Visa is uncertain whether it will resolve the claims as contemplated by the settlement agreement and additional lawsuits may arise.

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Note 9: Derivative Financial Instruments and Hedging Activities

We have entered into interest rate swap agreements, primarily as an interest rate risk management strategy, in order to mitigate the changes in the fair value of specified long-term fixed-rate loans (or firm commitments to enter into long-term fixed-rate loans) caused by changes in interest rates. These hedges allow us to offer long-term fixed-rate loans to customers without assuming the interest rate risk of a long-term asset. Converting our fixed-rate interest payments to floating-rate interest payments, generally benchmarked to the one-month U.S. dollar LIBOR index, protects us against changes in the fair value of our loans associated with fluctuating interest rates.

Our credit exposure, if any, on interest rate swap asset positions is limited to the fair value (net of any collateral pledged to us) and interest payments of all swaps by each counterparty. Conversely, when an interest rate swap is in a liability position exceeding a certain threshold, we may be required to post collateral to the counterparty in an amount determined by the agreements. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values.

As of June 30, 2018, we had five interest rate swap agreements, which are scheduled to mature in June 2031, October 2031, July 2032, August 2037 and October 2037. All of our derivatives are designated hedging instruments and are accounted for as fair value hedges. The notional amounts of the interest rate contracts are equal to the notional amounts of the hedged loans. Our interest rate swap payments are settled monthly with counterparties. Accrued interest on the swaps totaled $5 thousand and $8 thousand as of June 30, 2018 and December 31, 2017, respectively.

The following tables presents the notional amount and fair value of our derivatives designated as hedging instruments:

	Derivative Assets				Derivative Liabilities
(in thousands)	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Fair value hedges:
Interest rate contracts notional amount	$	9,081	$	4,019	$	9,293	$	14,810
Interest rate contracts fair value1	$	327	$	74	$	276	$	740

¹ See Note 3,Fair Value of Assets and Liabilities, for valuation methodology.

The table below presents the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of hedged assets as of June 30, 2018:

(in thousands)	Carrying Amounts of Hedged Assets		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans
Loans	$	18,112	$	(262	)

The table below presents the net gains (losses) recognized in interest income on loans on the consolidated statements of comprehensive income related to our derivatives designated as fair value hedges:

	Three months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	187		$	(129	)
Payment on interest rate swaps	$	(40	)	$	(87	)
(Decrease) increase in value of hedged loans	$	(116	)	$	191
Decrease in value of yield maintenance agreement	$	(3	)	$	(4	)
Net gain (loss) on fair value hedging relationships recognized in interest income	$	28		$	(29	)
	Six months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	716		$	(18	)
Payment on interest rate swaps	$	(95	)	$	(185	)
(Decrease) increase in value of hedged loans	$	(693	)	$	78
Decrease in value of yield maintenance agreement	$	(7	)	$	(7	)
Net loss on fair value hedging relationships recognized against interest income	$	(79	)	$	(132	)

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Our derivative transactions with counterparties are under International Swaps and Derivative Association (“ISDA”) master agreements that include “right of set-off” provisions. “Right of set-off” provisions are legally enforceable rights to offset recognized amounts and there may be an intention to settle such amounts on a net basis. We do not offset such financial instruments for financial reporting purposes.

The following table shows information on financial instruments that are eligible for offset in the consolidated statements of condition.

Offsetting of Financial Assets and Derivative Assets
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Assets Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Assets1		Condition		of Condition1		Instruments			Received		Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	327	$	—	$	327	$	(276	)	$	—	$	51
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	74	$	—	$	74	$	(74	)	$	—	$	—

¹ Amounts exclude accrued interest totaling less than $1 thousand at both June 30, 2018 and December 31, 2017.

Offsetting of Financial Liabilities and Derivative Liabilities
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Liabilities Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Liabilities2		Condition		of Condition2		Instruments			Pledged			Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	276	$	—	$	276	$	(276	)				$	—
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	740	$	—	$	740	$	(74	)	$	(666	)	$	—

² Amounts exclude accrued interest totaling $4 thousand and $8 thousand at June 30, 2018 and December 31, 2017, respectively.

For more information on how we account for our interest rate swaps, refer to Note 1 to the Consolidated Financial Statements included in our 2017 Form 10-K filed with the SEC on March 14, 2018.

Note 10: Acquisition

On November 21, 2017, we completed the merger of Bank of Napa, N.A. (OTCQB: BNNP), to enhance our market presence in Napa, California. Bank of Napa was a national bank with two branch offices serving Napa. The acquisition added $134.7 million in loans, $249.9 million in deposits and $75.5 million in investment securities to Bank of Marin as of the acquisition date. Bank of Napa shareholders received 0.307 shares of Bancorp common stock for each share of Bank of Napa common stock outstanding. We have accounted for the acquisition of Bank of Napa as a business combination under the acquisition method of accounting. The assets acquired and liabilities assumed, both tangible and intangible, were recorded at their fair values as of the acquisition date in accordance with ASC 805, Business Combinations. The acquisition was treated as a "reorganization" within the definition of section 368(a) of the Internal Revenue Code and is generally considered tax-free for U.S. federal income tax purposes.

The Bank of Napa acquisition resulted in $23.7 million in goodwill, which represents the excess of the total purchase price paid over the fair value of the assets acquired, net of the fair values of liabilities assumed. Goodwill mainly reflects expected value created through the combined operations of Bank of Napa and Bank of Marin, which we evaluate for impairment annually. We determined that the fair value of our traditional community banking activities (provided through our branch network) exceeded the carrying amount of the bank-level reporting unit. The goodwill is not deductible for tax purposes.

The core deposit intangible represents the estimated future benefits of acquired deposits and is booked separately from the related deposits. We recorded a core deposit intangible asset of $4.4 million from the Bank of Napa acquisition on November 21, 2017, of which $56 thousand was amortized in 2017 and $254 thousand was amortized in the first six months of 2018. The core deposit intangible is amortized on an accelerated basis over an estimated ten-year life, and is evaluated periodically for impairment. No impairment loss was recognized as of June 30, 2018.

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Acquisition-related expenses are recognized as incurred and continue until all systems have been converted and operational functions become fully integrated. Bank of Marin Bancorp incurred acquisition-related expenses in the consolidated statements of comprehensive income for the three and six months ended June 30, 2018 as follows:

(in thousands)	Three months ended June 30, 2018		Six months ended June 30, 2018
Data processing1	$	163	$	555
Professional services	31		126
Personnel severance	35		141
Other	21		43
Total	$	250	$	865
1 Primarily relates to Bank of Napa's core processing system contract termination and deconversion fees.

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ITEM 2.     Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management's discussion of the financial condition and results of operations, which is unaudited, should be read in conjunction with the related consolidated financial statements in this Form 10-Q and with the audited consolidated financial statements and accompanying notes included in our 2017 Annual Report on Form 10-K. Average balances, including balances used in calculating certain financial ratios, are generally comprised of average daily balances.

Forward-Looking Statements

This discussion of financial results includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, (the "1933 Act") and Section 21E of the Securities Exchange Act of 1934, as amended, (the "1934 Act"). Those sections of the 1933 Act and 1934 Act provide a "safe harbor" for forward-looking statements to encourage companies to provide prospective information about their financial performance so long as they provide meaningful, cautionary statements identifying important factors that could cause actual results to differ significantly from projected results.

Our forward-looking statements include descriptions of plans or objectives of Management for future operations, products or services, and forecasts of revenues, earnings or other measures of economic performance. Forward-looking statements can be identified by the fact that they do not relate strictly to historical or current facts. They often include the words "believe," "expect," "intend," "estimate" or words of similar meaning, or future or conditional verbs preceded by "will," "would," "should," "could" or "may."

Forward-looking statements are based on Management's current expectations regarding economic, legislative, and regulatory issues, and the successful integration of acquisitions that may affect our earnings in future periods. A number of factors, many of which are beyond Management’s control, could cause future results to vary materially from current Management expectations. Such factors include, but are not limited to, general economic conditions and the economic uncertainty in the United States and abroad, including changes in interest rates, deposit flows, real estate values, and expected future cash flows on loans and securities; costs or effects of acquisitions; competition; changes in accounting principles, policies or guidelines; changes in legislation or regulation (including the Tax Cuts and Jobs Act of 2017); natural disasters (such as the 2017 wildfires in our area); adverse weather conditions; and other economic, competitive, governmental, regulatory and technological factors (including external fraud and cyber-security threats) affecting our operations, pricing, products and services.

Important factors that could cause results or performance to materially differ from those expressed in our prior forward-looking statements are detailed in the Risk Factors section of this Form 10-Q and in Item 1A. Risk Factors section of our 2017 Form 10-K as filed with the SEC, copies of which are available from us at no charge. Forward-looking statements speak only as of the date they are made. We do not undertake to update forward-looking statements to reflect circumstances or events that occur after the date the forward-looking statements are made or to reflect the occurrence of unanticipated events.

Critical Accounting Policies and Estimates

Critical accounting policies are those that are both important to the portrayal of our financial condition and results of operations and require Management's most difficult, subjective, or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain and imprecise. There have been no material changes to our critical accounting policies, which include: Allowance for Loan Losses, Other-than-temporary Impairment of Investment Securities, Accounting for Income Taxes, and Fair Value Measurements. For a detailed discussion, refer to Note 1 to the Consolidated Financial Statements included in our 2017 Form 10-K filed with the SEC on March 14, 2018 and Note 2, Recently Adopted and Issued Accounting Standards, to the Consolidated Financial Statements in this Form 10-Q.

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Executive Summary

Earnings in the second quarter of 2018 totaled $7.9 million, compared to $5.2 million in the second quarter of 2017. Diluted earnings per share were $1.12 in the second quarter of 2018, compared to $0.84 in the same quarter a year ago. Earnings for the first six months of 2018 totaled $14.3 million compared to $9.7 million in the same period last year. Diluted earnings per share were $2.03 and $1.58 in the first six months of 2018 and 2017, respectively.

The following are highlights of our operating and financial performance for the periods presented:

• The Board of Directors declared a cash dividend of $0.32 per share on July 20, 2018, a $0.01 increase from the prior quarter. This represents the 53^rd consecutive quarterly dividend paid by Bank of Marin Bancorp. The dividend is payable on August 10, 2018, to shareholders of record at the close of business on August 3, 2018.

• Loans totaled $1,717.6 million at June 30, 2018, compared to $1,679.0 million at December 31, 2017, raising the loan to deposit ratio from 78.1% to 80.3%. New loan volume of $113.2 million in the in the first half of 2018 was partially offset by payoffs of $68.8 million, and combined with changes in lines of credit utilization and amortization on existing loans, resulted in the net increase of $38.6 million.

• Strong credit quality remains a cornerstone of the Bank's consistent performance. Non-accrual loans totaled $385 thousand, or 0.02% of the loan portfolio at June 30, 2018, compared to $406 thousand, or 0.02% at December 31, 2017. Classified loans totaled $13.9 million at June 30, 2018, compared to $27.9 million at December 31, 2017. The decrease in classified loans is primarily due to two borrowing relationships whose risk grades were upgraded from substandard to special mention in the second quarter of 2018. Accruing loans past due 30 to 89 days totaled $88 thousand at June 30, 2018, compared to $1.9 million at December 31, 2017. There was no provision for either loan losses or off-balance sheet commitments recorded in the first six months of 2018.

• Total deposits decreased $10.9 million in the first half of 2018 to $2,137.7 million at June 30, 2018. The decrease in deposits was primarily due to normal cash fluctuations of our large business clients. Additionally, some businesses moved balances into off-balance sheet time deposit products to realize higher interest rates while maintaining their relationships with the Bank. A small number of account holders who were focused solely on obtaining the highest rates in the marketplace moved to other institutions.Non-interest bearing deposits represented 49.5% of total deposits, and the annualized cost of total deposits for the first six months of 2018 was 0.08%.

• Reported net interest margin was 3.87% in the second quarter of 2018, which increased 16 basis points compared to the second quarter of 2017, resulting primarily from higher loan and investment yields.

• Pre-tax net income was up $2.8 million, or 36.1%, compared to the same quarter last year. Due to recent tax reform, the federal statutory income tax rate decreased to 21% beginning January 1, 2018. Bancorp's effective tax rate in the second quarter of 2018 was 25.4%, compared to 33.2% in the second quarter of 2017. Earnings in the second quarter of 2018 were favorably impacted by both the tax reform and higher earning assets from the Bank of Napa acquisition. Cost savings from the Bank of Napa acquisition are meeting expectations and should be fully embedded in the third quarter of 2018.

• Return on assets was 1.28% for the quarter ended June 30, 2018, compared to 1.01% for the quarter ended June 30, 2017. Return on equity was 10.54% for the quarter ended June 30, 2018, compared to 8.74% for the quarter ended June 30, 2017.

• All capital ratios are well above regulatory requirements for a well-capitalized institution. The total risk-based capital ratio for Bancorp was 15.2% at June 30, 2018, compared to 14.9% at December 31, 2017.

Looking forward into 2018, we believe that our core values - relationship banking, disciplined fundamentals and commitment to the communities that we serve - will continue to drive the success of the Bank.  By building strong relationships in vibrant markets, we are able to grow our loan portfolio and deposit franchise organically. Disciplined fundamentals ensure that our credit quality remains high, our deposit base is reasonably priced, and our operations are highly efficient, all of which contribute to profitability and net interest margin expansion.  Our success helps us to attract the most qualified professionals in the marketplace.

Our strong liquidity and capital supports our organic growth as well as acquisitions. This gives us a great deal of flexibility as we seek opportunities that add value to the Company.

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RESULTS OF OPERATIONS

Highlights of the financial results are presented in the following tables:

(dollars in thousands)	June 30, 2018			December 31, 2017
Selected financial condition data:
Total assets	$	2,465,042		$	2,468,154
Loans, net	1,701,798			1,663,246
Deposits	2,137,723			2,148,670
Borrowings	5,802			5,739
Stockholders' equity	304,198			297,025
Asset quality ratios:
Allowance for loan losses to total loans	0.92%			0.94		%
Allowance for loan losses to non-accrual loans	41.11		x	38.88x
Non-accrual loans to total loans	0.02%			0.02		%
Capital ratios:
Equity to total assets ratio	12.34		%	12.03		%
Total capital (to risk-weighted assets)	15.15		%	14.91		%
Tier 1 capital (to risk-weighted assets)	14.30		%	14.04		%
Tier 1 capital (to average assets)	11.57		%	12.13		%
Common equity Tier 1 capital (to risk weighted assets)	14.01		%	13.75		%

	Three months ended				Six months ended
(dollars in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Selected operating data:
Net interest income	$	22,842	$	18,304	$	44,733	$	35,925
Non-interest income	2,238		2,096		4,480		4,211
Non-interest expense 1	14,509		12,631		30,590		25,642
Net income 1	7,891		5,186		14,280		9,734
Net income per common share:
Basic	$	1.14	$	0.85	$	2.06	$	1.60
Diluted	$	1.12	$	0.84	$	2.03	$	1.58
Performance and other financial ratios:
Return on average assets	1.28%		1.01%		1.17%		0.96%
Return on average equity	10.54%		8.74%		9.63%		8.34%
Tax-equivalent net interest margin 3	3.92%		3.85%		3.89%		3.82%
Efficiency ratio	57.85%		61.92%		62.16%		63.89%
Cash dividend payout ratio on common stock 2	27.19%		31.76%		29.13%		33.75%

¹ Includes merger-related costs totaling $250 thousand and $865 thousand for the three and six months ended June 30, 2018.

² Calculated as dividends on common shares divided by basic net income per common share.

³ Tax-equivalent net interest margin is computed by dividing taxable equivalent net interest income, which is adjusted for taxable equivalent income on tax-exempt loans and securities based on Federal statutory rate of 21 percent in 2018 and 35 percent in 2017, by total average interest-earning assets.

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Net Interest Income

Net interest income is the difference between the interest earned on loans, investments and other interest-earning assets and the interest expense incurred on deposits and other interest-bearing liabilities. Net interest income is impacted by changes in general market interest rates and by changes in the amounts and composition of interest-earning assets and interest-bearing liabilities. Interest rate changes can create fluctuations in the net interest income and/or margin due to an imbalance in the timing of repricing and maturity of assets and liabilities. We manage interest rate risk exposure with the goal of minimizing the impact of interest rate volatility on net interest income. For more information, refer to Item 3. Quantitative and Qualitative Disclosure about Market Risk in this Form 10-Q.

Net interest margin is expressed as net interest income divided by average interest-earning assets. Net interest rate spread is the difference between the average rate earned on total interest-earning assets and the average rate incurred on total interest-bearing liabilities. Both of these measures are reported on a taxable-equivalent basis. Net interest margin is the higher of the two because it reflects interest income earned on assets funded with non-interest-bearing sources of funds, which include demand deposits and stockholders’ equity.

Average Statements of Condition and Analysis of Net Interest Income

The following table compares interest income, average interest-earning assets, interest expense, and average interest-bearing liabilities for the periods presented. The table also presents net interest income, net interest margin and net interest rate spread for each period reported.

		Three months ended						Three months ended
		June 30, 2018						June 30, 2017
				Interest						Interest
		Average		Income/		Yield/		Average		Income/		Yield/
(dollars in thousands)		Balance		Expense		Rate		Balance		Expense		Rate
Assets
	Interest-bearing due from banks 1	$	62,665	$	285	1.80	%	$	56,597	$	157	1.10	%
	Investment securities 2, 3	574,669		3,611		2.51	%	408,335		2,355		2.31	%
	Loans 1, 3, 4	1,700,057		19,852		4.62	%	1,487,419		16,868		4.49	%
	Total interest-earning assets 1	2,337,391		23,748		4.02	%	1,952,351		19,380		3.93	%
	Cash and non-interest-bearing due from banks	40,383						46,204
	Bank premises and equipment, net	8,203						8,390
	Interest receivable and other assets, net	87,183						60,115
Total assets		$	2,473,160					$	2,067,060
Liabilities and Stockholders' Equity
	Interest-bearing transaction accounts	$	142,133	$	48	0.14	%	$	94,799	$	21	0.09	%
	Savings accounts	178,956		18		0.04	%	163,424		16		0.04	%
	Money market accounts	612,612		236		0.15	%	539,192		114		0.08	%
	Time accounts including CDARS	140,799		140		0.40	%	146,042		139		0.38	%
	Overnight borrowings 1	231		1		1.84	%	—		—		—	%
	Subordinated debentures 1	5,786		123		8.40	%	5,646		109		7.59	%
	Total interest-bearing liabilities	1,080,517		566		0.21	%	949,103		399		0.17	%
	Demand accounts	1,072,976						868,070
	Interest payable and other liabilities	19,443						11,771
	Stockholders' equity	300,224						238,116
Total liabilities & stockholders' equity		$	2,473,160					$	2,067,060
Tax-equivalent net interest income/margin 1				$	23,182	3.92	%			$	18,981	3.85	%
Reported net interest income/margin 1				$	22,842	3.87	%			$	18,304	3.71	%
Tax-equivalent net interest rate spread						3.81	%					3.76	%

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		Six months ended						Six months ended
		June 30, 2018						June 30, 2017
				Interest						Interest
		Average		Income/		Yield/		Average		Income/		Yield/
(dollars in thousands)		Balance		Expense		Rate		Balance		Expense		Rate
Assets
	Interest-bearing due from banks 1	$	83,641	$	688	1.64	%	$	43,043	$	217	1.00	%
	Investment securities 2, 3	553,723		6,887		2.49	%	411,427		4,716		2.29	%
	Loans 1, 3, 4	1,687,841		38,971		4.59	%	1,482,977		33,090		4.44	%
	Total interest-earning assets 1	2,325,205		46,546		3.98	%	1,937,447		38,023		3.90	%
	Cash and non-interest-bearing due from banks	43,084						42,189
	Bank premises and equipment, net	8,351						8,415
	Interest receivable and other assets, net	88,096						59,071
Total assets		$	2,464,736					$	2,047,122
Liabilities and Stockholders' Equity
	Interest-bearing transaction accounts	$	155,180	$	100	0.13	%	$	97,943	$	50	0.10	%
	Savings accounts	179,601		36		0.04	%	162,175		31		0.04	%
	Money market accounts	597,868		452		0.15	%	528,923		227		0.09	%
	Time accounts including CDARS	147,633		296		0.40	%	146,501		285		0.39	%
	Overnight borrowings 1	116		1		1.84	%	—		—		—	%
	Subordinated debentures 1	5,770		237		8.16	%	5,627		217		7.67	%
	Total interest-bearing liabilities	1,086,168		1,122		0.21	%	941,169		810		0.17	%
	Demand accounts	1,061,304						857,253
	Interest payable and other liabilities	18,180						13,200
	Stockholders' equity	299,084						235,500
Total liabilities & stockholders' equity		$	2,464,736					$	2,047,122
Tax-equivalent net interest income/margin 1				$	45,424	3.89	%			$	37,213	3.82	%
Reported net interest income/margin 1				$	44,733	3.83	%			$	35,925	3.69	%
Tax-equivalent net interest rate spread						3.77	%					3.73	%
1 Interest income/expense is divided by actual number of days in the period times 360 days to correspond to stated interest rate terms, where applicable.
2 Yields on available-for-sale securities are calculated based on amortized cost balances rather than fair value, as changes in fair value are reflected as a component of stockholders' equity. Investment security interest is earned on 30/360 day basis monthly.
3 Yields and interest income on tax-exempt securities and loans are presented on a taxable-equivalent basis using the Federal statutory rate of 21 percent in 2018 and 35 percent in 2017.
4 Average balances on loans outstanding include non-performing loans. The amortized portion of net loan origination fees is included in interest income on loans, representing an adjustment to the yield.

Analysis of Changes in Net Interest Income

The following table presents the effects of changes in average balances (volume) or changes in average rates on tax-equivalent net interest income for the years indicated. Volume variances are equal to the increase or decrease in average balances multiplied by prior period rates. Rate variances are equal to the increase or decrease in rates multiplied by prior period average balances. Mix variances are attributable to the change in yields or rates multiplied by the change in average balances.

Page-35

	Three Months Ended June 30, 2018 Compared to Three Months Ended June 30, 2017									Six Months Ended June 30, 2018 Compared to Six Months Ended June 30, 2017
(in thousands)	Volume			Yield/Rate		Mix		Total		Volume		Yield/Rate		Mix		Total
Interest-bearing due from banks	$	17		$	100	$	11	$	128	$	205	$	137	$	129	$	471
Investment securities 1	959			211		86		1,256		1,631		401		139		2,171
Loans 1	2,411			501		72		2,984		4,571		1,151		159		5,881
Total interest-earning assets	3,387			812		169		4,368		6,407		1,689		427		8,523
Interest-bearing transaction accounts	10			11		6		27		29		13		8		50
Savings accounts	2			—		—		2		3		2		—		5
Money market accounts	16			94		12		122		30		173		22		225
Time accounts, including CDARS	(5		)	6		—		1		2		9		—		11
Overnight borrowings	—			—		1		1		—		—		1		1
Subordinated debentures	3			11		—		14		6		14		—		20
Total interest-bearing liabilities	26			122		19		167		70		211		31		312
	$	3,361		$	690	$	150	$	4,201	$	6,337	$	1,478	$	396	$	8,211
1 Yields and interest income on tax-exempt securities and loans are presented on a taxable-equivalent basis using the federal statutory rate of 21% in 2018 and 35% in 2017.

Second Quarter of2018Compared to Second Quarter of2017

Net interest income totaled $22.8 million in the second quarter of 2018, compared to $18.3 million in the same quarter a year ago. The $4.5 million increase was primarily due to the $385.0 million increase in average earning assets from both the Bank of Napa acquisition and organic growth. Higher yields across all asset categories also positively impacted interest income for the current quarter.

The tax-equivalent net interest margin was 3.92% in the second quarter of 2018, compared to 3.85% in the same quarter of the previous year.  The increase compared to the second quarter of 2017 is related to higher yields on earning assets, partially offset by an increase in lower yielding securities as a percentage of total earning assets.

First Six Months of 2018 Compared to First Six Months of 2017

Net interest income totaled $44.7 million in the first six months of 2018, compared to $35.9 million for the same period in 2017. The $8.8 million increase primarily relates to a $387.8 million increase in average earning assets compared to 2017. Additionally, the higher yield on investment securities, interest-bearing cash, and loans positively impacted interest income.

The tax-equivalent net interest margin was 3.89% in the first half of 2018, compared to 3.82% in the first half of the previous year.  The increase compared to the first half of 2017 is related to higher yields on earning assets, partially offset by an increase in lower yielding cash and securities as a percentage of total earning assets.

Market Interest Rates

Market interest rates are, in part, based on the target federal funds interest rate (the interest rate banks charge each other for short-term borrowings) implemented by the Federal Reserve Open Market Committee ("FOMC"). Actions by the FOMC to increase the target federal funds rate by 25 basis points in December 2015, December 2016, March 2017, June 2017, December 2017, March 2018 and June 2018, have positively impacted yields on our rate sensitive interest-earning assets. The increase in June 2018, to the current target range for the federal funds rate of 1.75% to 2.00%, was the seventh rate hike since 2008. If interest rates continue to rise, we anticipate that our net interest income will increase. While short-term interest rates have risen and improved the Bank’s yields on prime-rate adjustable assets, longer-term rates that influence competitive pricing for fixed-rate lending activities have moved to a lesser degree.

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Impact of Acquired Loans on Net Interest Margin

Early payoffs or prepayments of our acquired loans with significant unamortized purchase discount/premium could result in volatility in our net interest margin. As our acquired loans from prior acquisitions continue to pay off, we expect the accretion income from these loans to continue to decline. The loans acquired from Bank of Napa are not expected to significantly increase the accretion income. Accretion and gains on payoffs of purchased loans are recorded in interest income and the positive affect on our net interest margin for the second quarter and first half of 2018 and 2017 were as follows:

	Three months ended						Six months ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
(dollars in thousands)	Dollar Amount		Basis point impact to net interest margin	Dollar Amount		Basis point impact to net interest margin	Dollar Amount		Basis point impact to net interest margin	Dollar Amount		Basis point impact to net interest margin
Accretion on PCI loans	$	84	1 bps	$	80	2 bps	$	195	2 bps	$	170	2 bps
Accretion on non-PCI loans	$	133	2 bps	$	178	3 bps	$	233	2 bps	$	328	3 bps
Gains on pay-offs of PCI loans	$	1	0 bps	$	84	2 bps	$	129	1 bps	$	84	1 bps

Provision for Loan Losses

Management assesses the adequacy of the allowance for loan losses quarterly based on several factors including growth of the loan portfolio, analysis of probable losses in the portfolio, historical loss experience and the current economic climate. While loss recoveries and provisions for loan losses charged to expense increase the allowance, actual losses on loans reduce the allowance.

Impaired loan balances totaled $15.9 million at June 30, 2018 and $16.9 million at December 31, 2017, with specific valuation allowances of $503 thousand and $513 thousand for the same respective dates. Classified assets (loans with substandard or doubtful risk grades) decreased to $13.9 million at June 30, 2018, from $27.9 million at December 31, 2017. The decrease in classified loans is primarily due to two borrowing relationships whose risk grades were upgraded from substandard to special mention in the second quarter of 2018. There were no loans with doubtful risk grades at June 30, 2018 or December 31, 2017.

There was no provision for loan losses recorded in the first half of 2018 and 2017, as the level of reserves was deemed appropriate for the portfolio. The two classified borrowing relationships that were upgraded in the second quarter (mentioned above) reduced the calculated general allowance for loan losses.  This reduction was primarily offset by general allowances resulting from significant loan growth and refinement of certain loan concentration qualitative factors, and an increase in specific reserves related to a loan that was modified as a troubled debt restructuring in the second quarter. Net recoveries in the second quarter of 2018 totaled $42 thousand compared to $13 thousand in the same quarter a year ago. Net recoveries totaled $46 thousand in the first half of 2018, compared to net charge-offs of $210 thousand in the first half of 2017.

The ratio of loan loss reserves to total loans was 0.92% at June 30, 2018, compared to 0.94% at December 31, 2017. Non-accrual loans totaled $385 thousand, or 0.02% of total loans, at June 30, 2018, compared to $406 thousand, or 0.02%, at December 31, 2017.

For more information, refer to Note 5 to the Consolidated Financial Statements in this Form 10-Q.

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Non-interest Income

The following table details the components of non-interest income.

	Three months ended				Amount			Percent
(dollars in thousands)	June 30, 2018		June 30, 2017		Increase (Decrease)			Increase (Decrease)
Service charges on deposit accounts	$	455	$	447	$	8		1.8	%
Wealth Management and Trust Services	488		504		(16		)	(3.2	)%
Debit card interchange fees	360		384		(24		)	(6.3	)%
Merchant interchange fees	118		112		6			5.4	%
Earnings on bank-owned life insurance	230		210		20			9.5	%
Dividends on FHLB stock	192		176		16			9.1	%
Gains on investment securities, net	11		10		1			10.0	%
Other income	384		253		131			51.8	%
Total non-interest income	$	2,238	$	2,096	$	142		6.8	%
	Six months ended				Amount			Percent
(dollars in thousands)	June 30, 2018		June 30, 2017		Increase (Decrease)			Increase (Decrease)
Service charges on deposit accounts	$	932	$	899	$	33		3.7	%
Wealth Management and Trust Services	1,003		1,007		(4		)	(0.4	)%
Debit card interchange fees	756		756		—			—	%
Merchant interchange fees	198		208		(10		)	(4.8	)%
Earnings on bank-owned life insurance	458		419		39			9.3	%
Dividends on FHLB stock	388		408		(20		)	(4.9	)%
Gains on investment securities, net	11		10		1			10.0	%
Other income	734		504		230			45.6	%
Total non-interest income	$	4,480	$	4,211	$	269		6.4	%

Second Quarter of2018Compared to Second Quarter of2017

Non-interest income increased by $142 thousand in the second quarter of 2018 to $2.2 million, compared to $2.1 million in the same quarter a year ago. The increase in other income was primarily due to an increase in fees on one-way deposits placed into deposit networks as a result of the rising market interest rate environment.

First Six Months of 2018 Compared to First Six Months of 2017

Non-interest income increased by $269 thousand in the first half of 2018 to $4.5 million, compared to $4.2 million in the same period a year ago. The increase in other income was due to the reasons mentioned above.

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Non-interest Expense

The following table details the components of non-interest expense.

	Three months ended					Amount			Percent
(dollars in thousands)	June 30, 2018		June 30, 2017			Increase (Decrease)			Increase (Decrease)
Salaries and related benefits	$	8,316	$	7,287		$	1,029		14.1	%
Occupancy and equipment	1,511		1,380			131			9.5	%
Depreciation and amortization	546		463			83			17.9	%
Federal Deposit Insurance Corporation insurance	191		162			29			17.9	%
Data processing	1,023		963			60			6.2	%
Professional services	810		522			288			55.2	%
Directors' expense	183		224			(41		)	(18.3	)%
Information technology	264		186			78			41.9	%
Provision for losses on off-balance sheet commitments	—		(208		)	208			(100.0	)%
Other non-interest expense
Core deposit intangible amortization	230		118			112			94.9	%
Advertising	130		131			(1		)	(0.8	)%
Other expense	1,305		1,403			(98		)	(7.0	)%
Total other non-interest expense	1,665		1,652			13			0.8	%
Total non-interest expense	$	14,509	$	12,631		$	1,878		14.9	%
	Six months ended					Amount			Percent
(dollars in thousands)	June 30, 2018		June 30, 2017			Increase (Decrease)			Increase (Decrease)
Salaries and related benefits	$	17,333	$	14,762		$	2,571		17.4	%
Occupancy and equipment	3,018		2,699			319			11.8	%
Depreciation and amortization	1,093		944			149			15.8	%
Federal Deposit Insurance Corporation insurance	382		323			59			18.3	%
Data processing	2,404		1,902			502			26.4	%
Professional services	2,109		1,044			1,065			102.0	%
Directors' expense	357		382			(25		)	(6.5	)%
Information technology	533		384			149			38.8	%
Provision for losses on off-balance sheet commitments	—		(43		)	43			(100.0	)%
Other non-interest expense
Core deposit intangible amortization	460		236			224			94.9	%
Advertising	308		204			104			51.0	%
Other expense	2,593		2,805			(212		)	(7.6	)%
Total other non-interest expense	3,361		3,245			116			3.6	%
Total non-interest expense	$	30,590	$	25,642		$	4,948		19.3	%
NM - Not Meaningful

Second Quarter of 2018 Compared to Second Quarter of 2017

Non-interest expense increased by $1.9 million to $14.5 million in the second quarter of 2018, compared to $12.6 million in the same quarter a year ago. The increase was primarily due to higher salaries and benefits related to the addition of Bank of Napa employees, merit increases and filling open positions. Professional services increased due to $300 thousand in consulting expenses related to core processing contract negotiations that will result in future technology cost savings. The increase also relates to $250 thousand in acquisition expenses ($163 thousand in data processing, $35 thousand in personnel severance, $31 thousand in professional services and $21 thousand in other expenses), as well as higher occupancy and equipment expenses related to rent for the two acquired branches from Bank of Napa, as well as the opening of the Healdsburg branch in August 2017. We expect additional Bank of Napa acquisition expenses to be minimal in the remainder of 2018. Additionally, we amortized $127 thousand of the core-

Page-39

deposit intangible ("CDI") that arose from the Bank of Napa acquisition. There was no provision for losses on off-balance sheet commitments in the second quarter of 2018, compared to a $208 thousand reversal of the provision in the second quarter of 2017.

First Six Months of 2018 Compared to First Six Months of 2017

Non-interest expense increased by $4.9 million to $30.6 million in the first half of 2018, compared to $25.6 million in the same period a year ago. The increase was primarily due to higher salaries and benefits related to the addition of Bank of Napa employees, merit increases and filling open positions, as well as higher stock-based compensation related to awards granted in 2018 with certain participants meeting retirement eligibility requirements. Professional services increased due to $1.1 million in consulting expenses related to core processing contract negotiations that will result in future technology cost savings. The increase also relates to $865 thousand in acquisition expenses ($555 thousand in data processing, $126 thousand in professional services, $141 thousand in personnel severance and $43 thousand in other expenses), higher occupancy and equipment expenses related to rent for the two acquired branches from Bank of Napa, as well as the opening of the Healdsburg branch in August 2017. Additionally, the Bank amortized $254 thousand of the core-deposit intangible ("CDI") that arose from the Bank of Napa acquisition.

Provision for Income Taxes

The provision for income taxes for the second quarter of 2018 totaled $2.7 million at an effective tax rate of 25.4%, compared to $2.6 million at an effective tax rate of 33.2% in the same quarter last year. The provision for income taxes for the first half of 2018 totaled $4.3 million at an effective tax rate of 23.3%, compared to $4.8 million at an effective tax rate of 32.8% for the first half of 2017. The declines for the 2018 periods compared to the prior year periods reflect the reduction in the federal corporate income tax rate from 35% to 21% related to the enactment of the Tax Cuts and Jobs Act of 2017, effective January 1, 2018. Income tax provisions reflect accruals for taxes at the applicable rates for federal income tax and California franchise tax based upon reported pre-tax income, and adjusted for the effects of all permanent differences between income for tax and financial reporting purposes (such as earnings on tax exempt loans and municipal securities, BOLI, and low-income housing tax credits) as well as transactions with discrete tax effects (such as the exercise of stock options and disqualifying dispositions of incentive stock options). The resulting reduction in the federal statutory rate was partially offset by the effect of the higher level of expected pre-tax income in 2018 and elimination or reductions to the deductibility of certain meals, entertainment, parking and transportation expenses due to the Tax Cuts and Jobs Act of 2017. Lastly, excess tax benefits resulting from the exercise of non-qualified stock options, the disqualifying disposition of incentive stock options and vesting of restricted stock awards totaled $426 thousand in the first six months of 2018, an increase of $246 thousand from the first half of 2017. Except for these discrete tax effects, which reduced our effective tax rate in the first half of 2018 by approximately 2.3%, our income tax provision is reflective of our current expectation for the remainder of the year.

We file a consolidated return in the U.S. Federal tax jurisdiction and a combined return in the State of California tax jurisdiction. There were no ongoing federal or state income tax examinations at the issuance of this report. At June 30, 2018, neither the Bank nor Bancorp had accruals for interest nor penalties related to unrecognized tax benefits.

FINANCIAL CONDITION SUMMARY

At June 30, 2018, assets totaled $2,465.0 million, a decrease of $3.2 million when compared to $2,468.2 million at December 31, 2017. Excess cash was mainly deployed into investment securities and new loans during the first half of 2018 as discussed below.

Investment Securities

The investment securities portfolio totaled $558.8 million at June 30, 2018, an increase of $75.3 million from December 31, 2017. The increase reflects year-to-date purchases of investment securities that are either issued or guaranteed by the US government totaling $123.3 million, which were partially offset by paydowns and maturities totaling $34.2 million and sales of $5.0 million. As part of our ongoing review of our investment securities portfolio, we reassessed the classification of certain securities issued by government sponsored agencies and transferred $27.4 million of these securities from available-for-sale to held-to-maturity at fair value during the second quarter of 2018. We maintain liquidity to support our future loan growth by holding investment securities averaging less than 5 years duration and cash earning 1.95% at the Federal Reserve Bank as of June 30, 2018.

Page-40

The following table summarizes our investment in obligations of state and political subdivisions at June 30, 2018 and December 31, 2017.

		June 30, 2018						December 31, 2017
(dollars in thousands)		Amortized Cost		Fair Value		% of Total State and Political Subdivisions		Amortized Cost		Fair Value		% of Total State and Political Subdivisions
Within California:
	General obligation bonds	$	17,834	$	17,700	16.7	%	$	19,634	$	19,678	16.7	%
	Revenue bonds	9,777		9,813		9.1		11,660		11,776		9.9
	Tax allocation bonds	6,590		6,635		6.2		6,099		6,234		5.2
Total within California		34,201		34,148		32.0		37,393		37,688		31.8
Outside California:
	General obligation bonds	64,219		62,624		60.0		68,890		68,454		58.5
	Revenue bonds	8,567		8,506		8.0		11,390		11,346		9.7
Total outside California		72,786		71,130		68.0		80,280		79,800		68.2
Total obligations of state and political subdivisions		$	106,987	$	105,278	100.0	%	$	117,673	$	117,488	100.0	%

The portion of the portfolio outside the state of California is distributed among twenty states. Of the total investment in obligations of state and political subdivisions, the largest concentrations outside California are Washington (13.2%), Texas (12.0%), and Minnesota (8.5%). Revenue bonds, both within and outside California, primarily consist of bonds relating to essential services (such as public improvements, transportation and utilities) and school district bonds.

Investments in states, municipalities and political subdivisions are subject to an initial pre-purchase credit assessment and ongoing monitoring. Key considerations include:

• The soundness of a municipality’s budgetary position and stability of its tax revenues

• Debt profile and level of unfunded liabilities, diversity of revenue sources, taxing authority of the issuer

• Local demographics/economics including unemployment data, largest taxpayers and local employers, income indices and home values

• For revenue bonds, the source and strength of revenue for municipal authorities including the obligor’s financial condition and reserve levels, annual debt service and debt coverage ratio, and credit enhancement (such as insurer’s strength and collateral in escrow accounts)

• Credit ratings by major credit rating agencies

Loans

Loans increased by $38.6 million and totaled $1,717.6 million at June 30, 2018, compared to $1,679.0 million at December 31, 2017. New loan originations in the first six months of 2018 of $113.2 million were primarily in commercial real estate, including both owner-occupied and investor-owned, spread throughout our markets, and tenancy-in-common fractional interest loans. Loan pay-offs totaling $68.8 million were due largely to the successful completion of construction projects and customer sales of assets financed by the Bank.

Liabilities

During the first six months of 2018, total liabilities increased by $10.3 million to $2,160.8 million. Deposits decreased $10.9 million in the first six months of 2018, primarily due to fluctuations from large commercial clients' operational cash flows. Non-interest bearing deposits increased $43.6 million in the first six months of 2018 to $1,057.7 million, or 49.5% of total deposits at June 30, 2018, compared to 47.2% at December 31, 2017.

Page-41

Capital Adequacy

We are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements as set forth in the following tables can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a material effect on our consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and the Bank’s prompt corrective action classification are also subject to qualitative judgments by the regulators about components of capital, risk weightings and other factors.

Management reviews capital ratios on a regular basis to ensure that capital exceeds the prescribed regulatory minimums and is adequate to meet our anticipated future needs.  For all periods presented, the Bank’s ratios exceed the regulatory definition of “well capitalized” under the regulatory framework for prompt corrective action and Bancorp’s ratios exceed the required minimum ratios to be considered a well-capitalized bank holding company. In addition, the most recent notification from the FDIC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action as of March 31, 2018. There are no conditions or events since that notification that Management believes have changed the Bank’s categories and we expect the Bank to remain well capitalized for prompt corrective action purposes.

In July 2013, the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation and the Office of the Comptroller of the Currency ("Agencies") finalized regulatory capital rules known as “Basel III.” The rules became effective beginning January 2015, and will be fully phased-in by January 2019. The guidelines, among other things, changed the minimum capital requirements of banks and bank holding companies, by increasing the Tier 1 capital to risk-weighted assets ratio to 6%, and introduced a new requirement to maintain a minimum ratio of common equity Tier 1 capital to risk-weighted assets of 4.5%. By 2019, when fully phased in, the rules will require further increases to certain minimum capital requirements and a capital conservation buffer of an additional 2.5% of risk-weighted assets.

We have modeled our ratios under the fully phased-in Basel III rules, and based on present facts and the recently announced $25 million share repurchase program, we do not expect that we will be required to raise additional capital as a result of the fully phased-in rules.

On May 24, 2018, The Economic Growth, Regulatory Relief, and Consumer Protection Act, also known as the Crapo Bill, was signed into law and will exempt banks with less than $10 billion in assets from certain regulatory requirements. For those banks, it establishes a Community Bank Leverage Ratio ("CBLR"), which is calculated as tangible equity capital divided by the average total assets. The CBLR minimum requirement would be set between 8% and 10%, and if an exempt bank maintains CBLR above the threshold, it can opt out of reporting or complying with other regulatory capital ratios. We will evaluate whether to adopt this new regulatory capital framework once further details and guidance of the Crapo Bill are released.

The Bancorp’s and Bank’s capital adequacy ratios as of June 30, 2018 and December 31, 2017 are presented in the following tables. Bancorp's Tier 1 capital includes the subordinated debentures, which are not included at the Bank level. We continued to build capital in 2018 through the accumulation of net income. Our Share Repurchase Program announced on April 23, 2018 may affect future capital levels, as described in Item 1. Note 7, Stockholders Equity, of this Form 10-Q.

Page-42

Capital Ratios for Bancorp (dollars in thousands)	Actual Ratio				Adequately Capitalized Threshold1				Ratio to be a Well Capitalized Bank Holding Company
June 30, 2018	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to risk-weighted assets)	$	300,015	15.15	%	≥ $	195,538	≥ 9.875	%	≥ $	198,013	≥ 10.00	%
Tier 1 Capital (to risk-weighted assets)	$	283,244	14.30	%	≥ $	155,935	≥ 7.875	%	≥ $	158,410	≥ 8.00	%
Tier 1 Capital (to average assets)	$	283,244	11.57	%	≥ $	97,925	≥ 4.000	%	≥ $	122,407	≥ 5.00	%
Common Equity Tier 1 (to risk-weighted assets)	$	277,442	14.01	%	≥ $	126,233	≥ 6.375	%	≥ $	128,708	≥ 6.50	%
December 31, 2017
Total Capital (to risk-weighted assets)	$	287,435	14.91	%	≥ $	178,323	≥ 9.250	%	≥ $	192,782	≥ 10.00	%
Tier 1 Capital (to risk-weighted assets)	$	270,710	14.04	%	≥ $	139,767	≥ 7.250	%	≥ $	154,225	≥ 8.00	%
Tier 1 Capital (to average assets)	$	270,710	12.13	%	≥ $	89,285	≥ 4.000	%	≥ $	111,607	≥ 5.00	%
Common Equity Tier 1 (to risk-weighted assets)	$	265,119	13.75	%	≥ $	110,849	≥ 5.750	%	≥ $	125,308	≥ 6.50	%

¹ The adequately capitalized threshold includes the capital conservation buffer that was effective January 1, 2016. These ratios are not reflected on a fully phased-in basis, which will occur in January 2019.

Capital Ratios for the Bank (dollars in thousands)	Actual Ratio				Adequately Capitalized Threshold1				Ratio to be Well Capitalized under Prompt Corrective Action Provisions
June 30, 2018	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to risk-weighted assets)	$	267,138	13.49	%	≥ $	195,487	≥ 9.875	%	≥ $	197,961	≥ 10.00	%
Tier 1 Capital (to risk-weighted assets)	$	250,367	12.65	%	≥ $	155,895	≥ 7.875	%	≥ $	158,369	≥ 8.00	%
Tier 1 Capital (to average assets)	$	250,367	10.23	%	≥ $	97,904	≥ 4.000	%	≥ $	122,380	≥ 5.00	%
Common Equity Tier 1 (to risk-weighted assets)	$	250,367	12.65	%	≥ $	126,200	≥ 6.375	%	≥ $	128,675	≥ 6.50	%
December 31, 2017
Total Capital (to risk-weighted assets)	$	283,885	14.73	%	≥ $	178,281	≥ 9.250	%	≥ $	192,737	≥ 10.00	%
Tier 1 Capital (to risk-weighted assets)	$	267,160	13.86	%	≥ $	139,734	≥ 7.250	%	≥ $	154,189	≥ 8.00	%
Tier 1 Capital (to average assets)	$	267,160	11.97	%	≥ $	89,275	≥ 4.000	%	≥ $	111,593	≥ 5.00	%
Common Equity Tier 1 (to risk-weighted assets)	$	267,160	13.86	%	≥ $	110,824	≥ 5.750	%	≥ $	125,279	≥ 6.50	%

¹ The adequately capitalized threshold includes the capital conservation buffer that was effective January 1, 2016. These ratios are not reflected on a fully phased-in basis, which will occur in January 2019.

Liquidity

The goal of liquidity management is to provide adequate funds to meet loan demand and to fund operating activities and deposit withdrawals. We accomplish this goal by maintaining an appropriate level of liquid assets and formal lines of credit with the FHLB, FRBSF and correspondent banks that enable us to borrow funds as discussed in Note 6 to the Consolidated Financial Statements in ITEM 1 of this report. Our Asset Liability Management Committee ("ALCO"), which is comprised of independent Bank directors and the President and Chief Executive Officer, is responsible for approving and monitoring our liquidity targets and strategies. ALCO has adopted a contingency funding plan that provides early detection of potential liquidity issues in the market or the Bank and institutes prompt responses that may prevent or alleviate a potential liquidity crisis. Management monitors liquidity daily and regularly adjusts our position based on current and future liquidity needs. We also have relationships with third party deposit networks and can adjust the placement of our deposits via reciprocal or one-way sales, as part of our cash management strategy.

We obtain funds from the repayment and maturity of loans, deposit inflows, investment security maturities and paydowns, federal funds purchases, FHLB advances, other borrowings, and cash flow from operations.  Our primary uses of funds are the origination of loans, the purchase of investment securities, withdrawals of deposits, maturity of certificates of deposit, repayment of borrowings and dividends to common stockholders.

The most significant factor in our daily liquidity position has been the level of customer deposits. We attract and retain new deposits, which depends upon the variety and effectiveness of our customer account products, service and convenience, and rates paid to customers, as well as our financial strength. The cash cycles of some of our large commercial depositors may cause short-term fluctuations in their deposit balances held with us.

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At June 30, 2018 our liquid assets, which included unencumbered available-for-sale securities and cash, totaled $420.8 million, a decrease of $81.1 million from December 31, 2017. Our cash and cash equivalents decreased $127.3 million from December 31, 2017. The primary uses of liquidity during the first six months of 2018 were $123.3 million in investment securities purchased, $38.8 million in new loans net of collection, a decrease in net deposits of $10.9 million, and $4.2 million in cash dividends paid on common stock to our shareholders. The primary sources of funds during the first six months of 2018 included $39.2 million in pay-downs and maturities of investment securities, and $18.8 million net cash provided by operating activities. Management anticipates that our current strong liquidity position and core deposit base will provide adequate liquidity to fund our operations.

Undrawn credit commitments, as discussed in Note 8 to the Consolidated Financial Statements in this Form 10-Q, totaled $458.2 million at June 30, 2018. These commitments, to the extent used, are expected to be funded primarily through the repayment of existing loans, deposit growth and liquid assets. Over the next twelve months, $92.5 million of time deposits will mature. We expect new deposits to replace these funds. Our emphasis on local deposits combined with our well-capitalized equity position, provides a very stable funding base.

Since Bancorp is a holding company and does not conduct regular banking operations, its primary sources of liquidity are dividends from the Bank. Under the California Financial Code, payment of a dividend from the Bank to Bancorp without advance regulatory approval is restricted to the lesser of the Bank’s retained earnings or the amount of the Bank’s net profits from the previous three fiscal years less the amount of dividends paid during that period. The primary uses of funds for Bancorp are shareholder dividends and ordinary operating expenses.  Bancorp held $32.5 million of cash at June 30, 2018. In April 2018, Bancorp obtained a dividend distribution from the Bank totaling $28.0 million, which is deemed sufficient to cover Bancorp's operational needs, share repurchases, and cash dividends to shareholders through the end of 2018. Management anticipates that there will be sufficient earnings at the Bank to provide dividends to Bancorp to meet its funding requirements for the near future.

ITEM 3.     Quantitative and Qualitative Disclosure about MarketRisk

Market risk is defined as the risk of loss arising from an adverse change in the market value (or prices) of financial instruments. A significant form of market risk is interest rate risk, which is inherent in our investment, borrowing, lending and deposit gathering activities. The Bank manages interest rate sensitivity to minimize the exposure of our net interest margin, earnings, and capital to changes in interest rates. Interest rate changes can create fluctuations in the net interest margin due to an imbalance in the timing of repricing or maturity of assets or liabilities.

We expect our net interest margin to increase if rates go up, primarily due to our cash earning the Federal Funds rate, adjustable rate loans and our significant non-interest bearing deposit base. Our net interest income remains most vulnerable to a falling interest rate environment.

To mitigate interest rate risk, the structure of the Consolidated Statement of Condition is managed with the objective of correlating the effects of interest rate changes on loans and investments with those of deposits and borrowings. The asset liability management policy sets limits on the acceptable amount of change to net interest income and economic value of equity under a variety of interest rate scenarios.

From time to time, we enter into interest rate swap contracts to mitigate the changes in the fair value of specified long-term fixed-rate loans and firm commitments to enter into long-term fixed-rate loans caused by changes in interest rates. See Note 9 to the Consolidated Financial Statements in this Form 10-Q.

ALCO and the Board of Directors review our exposure to interest rate risk at least quarterly. We use simulation models to measure interest rate risk and to evaluate strategies to improve profitability. A simplified static statement of condition is prepared on a quarterly basis as a starting point, using instrument level data of our actual loans, investments, borrowings and deposits as inputs. If potential changes to net equity value and net interest income resulting from hypothetical interest rate changes are not within the limits established by the Board of Directors, Management may adjust the asset and liability mix to bring the risk position within approved limits or take other actions. At June 30, 2018, interest rate risk was within policy guidelines established by ALCO and the Board.

One set of interest rates modeled and evaluated against flat interest rates is a series of immediate parallel shifts in the yield curve. These are provided in the following table as an example rather than an expectation of likely interest rate movements.

Page-44

Immediate Changes in Interest Rates (in basis points)	Estimated Change in Net Interest Income in Year 1, as percent of Net Interest Income		Estimated Change in Net Interest Income in Year 2, as percent of Net Interest Income
up 400	(0.7	)%	8.0	%
up 300	(0.4	)%	6.2	%
up 200	(0.2	)%	4.3	%
up 100	0.2	%	3.0	%
down 100	(5.8	)%	(10.1	)%

Interest rate sensitivity is a function of the repricing characteristics of our assets and liabilities. The Bank runs a combination of scenarios and sensitivities in its attempt to capture the range of interest rate risk including the simulations mentioned above. As with any simulation model or other method of measuring interest rate risk, limitations are inherent in the process and dependent on assumptions. For example, if we choose to pay interest on certain business deposits that are currently non-interest bearing, causing these deposits to become rate sensitive in the future, we would become less asset sensitive than the model currently indicates. Assets and liabilities may react differently to changes in market interest rates in terms of both timing and responsiveness to market rate movements. Further, the actual rates and timing of prepayments on loans and investment securities, and the behavior of depositors, could vary significantly from the assumptions applied in the various scenarios.

ITEM 4.       Controlsand Procedures

Evaluation of Disclosure Controls and Procedures

Bank of Marin Bancorp and its subsidiary (the "Company") conducted an evaluation under the supervision and with the participation of our Management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934 (the “Act”)) as of the end of the period covered by this report. The term disclosure controls and procedures means controls and other procedures that are designed to ensure that information we are required to disclose in the reports that we file or submit under the Act (15 U.S.C. 78a etseq.) is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information we are required to disclose in the reports that we file or submit under the Act is accumulated and communicated to our Management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

During the second quarter of 2018, we completed our integration and incorporation of Bank of Napa's business processes and systems into our overall internal control over financial reporting. During the quarter ended June 30, 2018, other than the Bank of Napa integration, there were no significant changes that materially affected, or are reasonably likely to affect, our internal control over financial reporting. The term internal control over financial reporting, as defined by Rule 15d-15(f) of the Act, is a process designed by, or under the supervision of, the issuer's principal executive and principal financial officers, or persons performing similar functions, and effected by the issuer's board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles.

Page-45

PART II       OTHER INFORMATION

ITEM 1         Legal Proceedings

Refer to Note 12 to the Consolidated Financial Statements in Item 8 of our 2017 Form 10-K and Note 8 to the Consolidated Financial Statements in this Form 10-Q.

ITEM 1A      Risk Factors

There have been no material changes from the risk factors previously disclosed in our 2017 Form 10-K. Refer to "Risk Factors" in Item 1A of our 2017 Form 10-K, pages 10 through 20.

ITEM 2       Unregistered Sales of Equity Securities and Use ofProceeds

On April 23, 2018, Bancorp announced that its Board of Directors approved a Share Repurchase Program under which Bancorp may repurchase up to $25.0 million of its outstanding common stock through May 1, 2019. For additional information, refer to Note 7 to the Consolidated Financial Statements in this Form 10-Q.

From April 23, 2018 to June 30, 2018, Bancorp purchased 1,398 shares at prices ranging from $73.14 to $75.00 for a total cost of $104 thousand. The following table reflects purchases under the Share Repurchase Program for the periods presented.

(in thousands, except per share data)	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Programs	Approximate Dollar Value That May yet Be Purchased Under the Program
Period
April 23-30, 2018	—	$	—	—	$	—
May 1-31, 2018	1,398	74.06		1,398	24,896
June 1-30, 2018	—	—		—	—
Total	1,398	$	74.06	1,398	$	24,896

ITEM 3       Defaults upon Senior Securities

None.

ITEM 4      Mine Safety Disclosures

Not applicable.

ITEM 5      Other Information

None.

ITEM 6       Exhibits

The following exhibits are filed as part of this report or hereby incorporated by references to filings previously made with the SEC.

Page-46

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File No.	Exhibit	Filing Date	Herewith
2.01	Agreement to Merger and Plan of Reorganization with Bank of Napa, dated July 31, 2017	8-K	001-33572	2.1	August 2, 2017
3.01	Articles of Incorporation, as amended	10-Q	001-33572	3.01	November 7, 2007
3.02	Bylaws	10-Q	001-33572	3.02	May 9, 2011
3.02a	Bylaw Amendment	8-K	001-33572	3.03	July 6, 2015
4.01	Rights Agreement, dated July 6, 2017	8-A12B	001-33572	4.1	July 7, 2017
10.01	Employee Stock Ownership Plan	S-8	333-218274	4.1	May 26, 2017
10.02	2017 Employee Stock Purchase Plan	S-8	333-221219	4.1	October 30, 2017
10.03	2017 Equity Plan	S-8	333-219067	4.1	June 30, 2017
10.04	2010 Director Stock Plan	S-8	333-167639	4.1	June 21, 2010
10.05	Form of Indemnification Agreement for Directors and Executive Officers, dated August 9, 2007	10-Q	001-33572	10.06	November 7, 2007
10.06	Form of Employment Agreement, dated January 23, 2009	8-K	001-33572	10.1	January 26, 2009
10.07	2010 Annual Individual Incentive Compensation Plan	8-K	001-33572	99.1	October 21, 2010
10.08	Salary Continuation Agreement for executive officer Russell Colombo, Chief Executive Officer, dated January 1, 2011	8-K	001-33572	10.1	January 6, 2011
10.09	Salary Continuation Agreement for executive officer Peter Pelham, Director of Retail Banking, dated January 1, 2011	8-K	001-33572	10.4	January 6, 2011
10.10	Salary Continuation Agreement for executive officer Tani Girton, Chief Financial Officer, dated October 18, 2013	8-K	001-33572	10.2	November 4, 2014
10.11	Salary Continuation Agreement for executive officer Elizabeth Reizman, Chief Credit Officer, dated July 20, 2014	8-K	001-33572	10.3	November 4, 2014
10.12	Salary Continuation Agreement for executive officer Timothy Myers, Executive Vice President and Commercial Banking Manager, dated May 28, 2015	8-K	001-33572	10.4	June 2, 2015
10.13	2007 Form of Change in Control Agreement	8-K	001-33572	10.1	October 31, 2007
11.01	Earnings Per Share Computation - included in Note 1 to the Consolidated Financial Statements					Filed
31.01	Certification of Principal Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					Filed
31.02	Certification of Principal Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002					Filed
32.01	Certification pursuant to 18 U.S.C. §1350 as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002					Filed
101.01*	XBRL Interactive Data File					Furnished

* As provided in Rule 406T of Regulation S-T, this information is furnished and not filed for purposes of Sections 11 and 12 of the Securities Act of 1933 and Section 18 of the Securities Exchange Act of 1934.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Bank of Marin Bancorp
	(registrant)
August 7, 2018	/s/ Russell A. Colombo
Date	Russell A. Colombo
	President &
	Chief Executive Officer
	(Principal Executive Officer)
August 7, 2018	/s/ Tani Girton
Date	Tani Girton
	Executive Vice President &
	Chief Financial Officer
	(Principal Financial Officer)
August 7, 2018	/s/ Cecilia Situ
Date	Cecilia Situ
	First Vice President &
	Manager of Finance & Treasury
	(Principal Accounting Officer)

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EX-31.01

EXHIBIT 31.01

Certification of Principal Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) as adopted pursuant to §302 of the Sarbanes-Oxley Act of 2002

I, Russell A. Colombo, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Bank of Marin Bancorp (the Registrant);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a -15(f) and 15d-15(f)) for the Registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiary, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of the Registrant's Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting, which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal controls over financial reporting.

August 7, 2018	/s/ Russell A. Colombo
Date	Russell A. Colombo
	President &
	Chief Executive Officer

EX-31.02

EXHIBIT 31.02

Certification of Principal Financial Officer pursuant to Rule 13a-14(a)/15d-14(a)as adopted pursuant to §302 of the Sarbanes-Oxley Act of 2002

I, Tani Girton, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Bank of Marin Bancorp (the Registrant);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiary, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of the Registrant's Board of Directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting, which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal controls over financial reporting.

August 7, 2018	/s/ Tani Girton
Date	Tani Girton
	Chief Financial Officer

EX-32.01

EXHIBIT 32.01

Certification pursuant to 18 U.S.C. §1350 as adopted pursuant to §906

of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report on Form 10-Q of Bank of Marin Bancorp (the Registrant) for the quarter ended June 30, 2018, as filed with the Securities and Exchange Commission, the undersigned hereby certify pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

1) such Form 10-Q fully complies with the requirements of Section 13(a) or 15(d)

of the Securities Exchange Act of 1934; and

2) the information contained in such Form 10-Q fairly presents, in all material

respects, the financial condition and results of operations of the Registrant.

August 7, 2018	/s/ Russell A. Colombo
Date	Russell A. Colombo
	President &
	Chief Executive Officer

August 7, 2018	/s/ Tani Girton
Date	Tani Girton
	Executive Vice President &
	Chief Financial Officer

This certification accompanies each report pursuant to §906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Registrant for purposes of §18 of the Securities Exchange Act of 1934, as amended.

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	Jun. 30, 2018	Jul. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Bank of Marin Bancorp
Entity Central Index Key	0001403475
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		6,993,452

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CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 83,855	$ 203,545
Investment securities
Held-to-maturity, at amortized cost	170,652	151,032
Available-for-sale, at fair value	388,137	332,467
Total investment securities	558,789	483,499
Loans, net of allowance for loan losses of $15,813 and $15,767 at June 30, 2018 and December 31, 2017, respectively	1,701,798	1,663,246
Bank premises and equipment, net	7,965	8,612
Goodwill	30,140	30,140
Core deposit intangible	6,032	6,492
Interest receivable and other assets	76,463	72,620
Total assets	2,465,042	2,468,154
Deposits
Non-interest bearing	1,057,745	1,014,103
Interest bearing
Transaction accounts	132,272	169,195
Savings accounts	179,187	178,473
Money market accounts	631,479	626,783
Time accounts	137,040	160,116
Total deposits	2,137,723	2,148,670
Subordinated debentures	5,802	5,739
Interest payable and other liabilities	17,319	16,720
Total liabilities	2,160,844	2,171,129
Stockholders' Equity
Preferred stock, no par value, Authorized - 5,000,000 shares, none issued	0	0
Common stock, no par value, Authorized - 15,000,000 shares; Issued and outstanding - 6,991,821 and 6,921,542 at June 30, 2018 and December 31, 2017, respectively	146,195	143,967
Retained earnings	166,281	155,544
Accumulated other comprehensive loss, net of taxes	(8,278)	(2,486)
Total stockholders' equity	304,198	297,025
Total liabilities and stockholders' equity	$ 2,465,042	$ 2,468,154

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CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable, Net Amount
Loans, allowance for loan losses	$ 15,813	$ 15,767
Stockholders' Equity
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Common stock, authorized (in shares)	15,000,000	15,000,000
Common stock, issued (in shares)	6,991,821	6,921,542
Common stock, outstanding (in shares)	6,991,821	6,921,542

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income
Interest and fees on loans	$ 19,624	$ 16,423	$ 38,511	$ 32,272
Interest on investment securities
Securities of U.S. government agencies	2,860	1,534	5,335	3,052
Obligations of state and political subdivisions	604	553	1,242	1,121
Corporate debt securities and other	35	36	79	73
Interest on Federal funds sold and due from banks	285	157	688	217
Total interest income	23,408	18,703	45,855	36,735
Interest expense
Interest on interest-bearing transaction accounts	48	21	100	50
Interest on savings accounts	18	16	36	31
Interest on money market accounts	236	114	452	227
Interest on time accounts	140	139	296	285
Interest on Federal Home Loan Bank (FHLB) and other borrowings	1	0	1	0
Interest on subordinated debentures	123	109	237	217
Total interest expense	566	399	1,122	810
Net interest income	22,842	18,304	44,733	35,925
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	22,842	18,304	44,733	35,925
Non-interest income
Merchant interchange fees	118	112	198	208
Earnings on bank-owned life insurance	230	210	458	419
Dividends on FHLB stock	192	176	388	408
Gains on investment securities, net	11	10	11	10
Other income	384	253	734	504
Total non-interest income	2,238	2,096	4,480	4,211
Non-interest expense
Salaries and related benefits	8,316	7,287	17,333	14,762
Occupancy and equipment	1,511	1,380	3,018	2,699
Depreciation and amortization	546	463	1,093	944
Federal Deposit Insurance Corporation insurance	191	162	382	323
Data processing	1,023	963	2,404	1,902
Professional services	810	522	2,109	1,044
Directors' expense	183	224	357	382
Information technology	264	186	533	384
Provision for losses on off-balance sheet commitments	0	(208)	0	(43)
Other expense	1,665	1,652	3,361	3,245
Total non-interest expense	14,509	12,631	30,590	25,642
Income before provision for income taxes	10,571	7,769	18,623	14,494
Provision for income taxes	2,680	2,583	4,343	4,760
Net income	$ 7,891	$ 5,186	$ 14,280	$ 9,734
Net income per common share:
Basic (usd per share)	$ 1.14	$ 0.85	$ 2.06	$ 1.60
Diluted (usd per share)	$ 1.12	$ 0.84	$ 2.03	$ 1.58
Weighted average shares:
Basic (shares)	6,944	6,110	6,929	6,101
Diluted (shares)	7,033	6,174	7,019	6,173
Dividends declared per common share (usd per share)	$ 0.31	$ 0.27	$ 0.60	$ 0.54
Comprehensive income:
Net income	$ 7,891	$ 5,186	$ 14,280	$ 9,734
Other comprehensive (loss) income
Change in net unrealized gain or loss on available-for-sale securities	(1,131)	1,961	(7,301)	3,635
Reclassification adjustment for gains on available-for-sale securities in net income	(11)	(10)	(11)	(10)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity	(278)	0	(278)	0
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity	132	124	268	165
Subtotal	(1,288)	2,075	(7,322)	3,790
Deferred tax (benefit) expense	(384)	892	(2,168)	1,596
Other comprehensive (loss) income, net of tax	(904)	1,183	(5,154)	2,194
Comprehensive income	6,987	6,369	9,126	11,928
Deposit Account
Non-interest income
Charges and Fees	455	447	932	899
Fiduciary and Trust
Non-interest income
Charges and Fees	488	504	1,003	1,007
Debit Card
Non-interest income
Charges and Fees	$ 360	$ 384	$ 756	$ 756

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss (AOCI), Net of Taxes
Balance (in shares) at Dec. 31, 2016		6,127,314
Balance at Dec. 31, 2016	$ 230,563	$ 87,392	$ 146,464	$ (3,293)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,976		15,976
Other comprehensive income (loss)	807			807
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings (in shares)		9,266
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	28	$ 28
Stock issued under employee stock purchase plan (in shares)		512
Stock issued under employee stock purchase plan	32	$ 32
Stock issued under employee stock ownership plan (ESOP) (in shares)		29,547
Stock issued under employee stock ownership plan (ESOP)	1,850	$ 1,850
Restricted stock granted (in shares)		16,230
Restricted stock granted	0
Stock-based compensation - stock options	529	$ 529
Stock-based compensation - restricted stock	742	$ 742
Cash dividends paid on common stock	(6,896)		(6,896)
Stock purchased by directors under director stock plan (in shares)		531
Stock purchased by directors under director stock plan	35	$ 35
Stock issued in payment of director fees (in shares)		2,878
Stock issued in payment of director fees	188	$ 188
Stock and stock options issued to Bank of Napa shareholders (net of payment for fractional shares of $14 thousand) (in shares)		735,264
Stock and stock options issued to Bank of Napa shareholders (net of payment for fractional shares of $14 thousand)	$ 53,171	$ 53,171
Balance (in shares) at Dec. 31, 2017	6,921,542	6,921,542
Balance at Dec. 31, 2017	$ 297,025	$ 143,967	155,544	(2,486)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,280		14,280
Other comprehensive income (loss)	(5,154)			(5,154)
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings (in shares)		50,075
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	534	$ 534
Stock issued under employee stock purchase plan (in shares)		265
Stock issued under employee stock purchase plan	19	$ 19
Stock issued under employee stock ownership plan (ESOP) (in shares)		7,900
Stock issued under employee stock ownership plan (ESOP)	601	$ 601
Restricted stock granted (in shares)		18,520
Restricted stock granted	0
Stock-based compensation - stock options	442	$ 442
Stock-based compensation - restricted stock	672	$ 672
Cash dividends paid on common stock	(4,181)		(4,181)
Stock purchased by directors under director stock plan (in shares)		260
Stock purchased by directors under director stock plan	18	$ 18
Stock issued in payment of director fees (in shares)		1,343
Stock issued in payment of director fees	91	$ 91
Reclassification of stranded tax effects in AOCI	0		638	(638)
Restricted stock surrendered for tax withholdings upon vesting (in shares)		(658)
Restricted stock surrendered for tax withholdings upon vesting	(45)	$ (45)
Restricted stock forfeited / cancelled (in shares)		(6,028)
Restricted stock forfeited / cancelled	0
Stock repurchased, net of commissions (in shares)		(1,398)
Stock repurchased, net of commissions	$ (104)	$ (104)
Balance (in shares) at Jun. 30, 2018	6,991,821	6,991,821
Balance at Jun. 30, 2018	$ 304,198	$ 146,195	$ 166,281	$ (8,278)

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Statement of Stockholders' Equity [Abstract]
Fractional shares issued in acquisition, payment	$ 14

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 7,891	$ 5,186	$ 14,280	$ 9,734	$ 15,976
Adjustments to reconcile net income to net cash provided by operating activities:
Reversal of losses on off-balance sheet commitments	0	(208)	0	(43)
Noncash contribution expense to employee stock ownership plan			601	0
Noncash director compensation expense			146	106
Stock-based compensation expense			1,114	710
Amortization of core deposit intangible			460	236
Amortization of investment security premiums, net of accretion of discounts			1,496	1,496
Accretion of discount on acquired loans			(428)	(498)
Accretion of discount on subordinated debentures			63	80
Net change in deferred loan origination costs/fees			18	60
Gain on sale of investment securities	(11)	(10)	(11)	(10)
Depreciation and amortization	546	463	1,093	944
Gain on sale of repossessed assets			0	(1)
Earnings on bank-owned life insurance policies	(230)	(210)	(458)	(419)
Net change in operating assets and liabilities:
Deferred rent and other rent-related expenses			(179)	114
Interest receivable and other assets			(971)	93
Interest payable and other liabilities			1,543	(389)
Total adjustments			4,487	2,479
Net cash provided by operating activities			18,767	12,213
Cash Flows from Investing Activities:
Purchase of held-to-maturity securities			(1,989)	(4,496)
Purchase of available-for-sale securities			(121,269)	(9,377)
Proceeds from sale of available-for-sale securities	5,006	1,321	5,006	1,321
Proceeds from paydowns/maturities of held-to-maturity securities			9,615	14,601
Proceeds from paydowns/maturities of available-for-sale securities			24,540	15,385
Loans originated and principal collected, net			(38,835)	(4,563)
Purchase of premises and equipment			(446)	(814)
Proceeds from sale of other real estate owned or repossessed assets			0	170
Cash paid for low-income housing tax credit investment			(373)	(628)
Net cash (used in) provided by investing activities			(123,751)	11,599
Cash Flows from Financing Activities:
Net (decrease) increase in deposits			(10,947)	67,840
Proceeds from stock options exercised			585	88
Payment of tax withholdings for stock options exercised and vesting of restricted stock			(96)	(60)
Proceeds from stock issued under employee and director stock purchase plans			37	737
Stock repurchased, net of commissions			(104)	0
Cash dividends paid on common stock			(4,181)	(3,315)
Net cash (used in) provided by financing activities			(14,706)	65,290
Net (decrease) increase in cash and cash equivalents			(119,690)	89,102
Cash and cash equivalents at beginning of period			203,545	48,804	48,804
Cash and cash equivalents at end of period	83,855	137,906	83,855	137,906	203,545
Supplemental disclosure of cash flow information:
Cash paid in interest			1,083	751
Cash paid in income taxes			2,000	4,620
Supplemental disclosure of noncash investing and financing activities:
Change in net unrealized gain or loss on available-for-sale securities			(7,301)	3,635
Securities transferred from available-for-sale to held-to-maturity			27,422	128,965	129,000
Amortization of net unrealized loss on available-for-sale securities transferred to held-to-maturity	$ 132	$ 124	268	165	165
Stock issued under employee stock ownership plan (ESOP)			601	0	$ 1,850
Stock issued in payment of director fees			$ 91	$ 82

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Basis of Presentation

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

 Basis of Presentation

The consolidated financial statements include the accounts of Bank of Marin Bancorp (“Bancorp”), a bank holding company, and its wholly-owned bank subsidiary, Bank of Marin (the “Bank”), a California state-chartered commercial bank. References to “we,” “our,” “us” mean Bancorp and the Bank that are consolidated for financial reporting purposes. The accompanying unaudited consolidated interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted pursuant to those rules and regulations. Although we believe that the disclosures are adequate and the information presented is not misleading, we suggest that these interim financial statements be read in conjunction with the annual financial statements and the notes thereto included in our 2017 Annual Report on Form 10-K.  In the opinion of Management, the unaudited consolidated financial statements reflect all adjustments, which are necessary for a fair presentation of the consolidated financial position, the results of operations, changes in comprehensive income, changes in stockholders’ equity, and cash flows for the periods presented. All material intercompany transactions have been eliminated. The results of these interim periods may not be indicative of the results for the full year or for any other period.

The NorCal Community Bancorp Trusts I and II, respectively (the "Trusts") were formed for the sole purpose of issuing trust preferred securities. Bancorp is not considered the primary beneficiary of the Trusts (variable interest entities), therefore the Trusts are not consolidated in our consolidated financial statements, but rather the subordinated debentures are shown as a liability on our consolidated statements of condition (See Note 6, Borrowings). Bancorp accounts for its investment in the securities of the Trusts under the equity method, which is included in interest receivable and other assets in the consolidated statements of condition.

The following table shows: 1) weighted average basic shares, 2) potentially dilutive weighted average common shares related to stock options and unvested restricted stock awards, and 3) weighted average diluted shares. Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Weighted average basic shares outstanding	6,944		6,110		6,929		6,101
Potentially dilutive common shares related to:
Stock options	74		52		74		57
Unvested restricted stock awards	15		12		16		15
Weighted average diluted shares outstanding	7,033		6,174		7,019		6,173
Net income	$	7,891	$	5,186	$	14,280	$	9,734
Basic EPS	$	1.14	$	0.85	$	2.06	$	1.60
Diluted EPS	$	1.12	$	0.84	$	2.03	$	1.58
Weighted average anti-dilutive shares not included in the calculation of diluted EPS	30		33		35		23

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Recently Adopted and Issued Accounting Standards

6 Months Ended

Jun. 30, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recently Adopted and Issued Accounting Standards

Recently Adopted and Issued Accounting Standards

Accounting Standards Adopted in 2018

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of this ASU (and all subsequent updates) is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. This ASU establishes a five-step model that must be used to recognize revenue that requires the entity to identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the entity satisfies the performance obligation. The ASU does not apply to the majority of our revenue, including revenue associated with financial instruments, such as loans and investment securities, and certain non-interest income, such as earnings on bank-owned life insurance, dividends on Federal Home Loan Bank ("FHLB") stock, gains or losses on sales of investment securities, and deposit overdraft charges. The standard allowed the use of either the full retrospective or modified retrospective transition method. We elected to apply the modified retrospective transition method to incomplete contracts as of the initial date of application on January 1, 2018. The adoption of the new standards did not have a material impact on our financial condition or results of operations as revenue recognition under the new standards did not change significantly from our current practice of recognizing the in-scope non-interest income. In addition, we did not retroactively revise prior period amounts or record a cumulative adjustment to retained earnings upon adoption. We considered the nature, amount, timing, and uncertainty of revenue from contracts with customers and determined that significant revenue streams are sufficiently disaggregated in the consolidated statements of comprehensive income.

Descriptions of our significant revenue-generating transactions that are within the scope of the new revenue recognition standards, which are presented in the consolidated statements of comprehensive income as components of non-interest income, are as follows:

• Wealth Management & Trust ("WM&T") fees - WM&T services include, but are not limited to: customized investment advisory and management; administrative services such as bill pay and tax reporting; trust administration, estate settlement, custody and fiduciary services. Performance obligations for investment advisory and management services are generally satisfied over time. Revenue is recognized monthly according to a tiered fee schedule based on the client's month-end market value of assets under our management. WM&T does not earn revenue based on performance or incentives. Costs associated with WM&T revenue-generating activities, such as payments to sub-advisors, are recorded separately as part of professional service expenses when incurred.

• Deposit account service charges - Service charges on deposit accounts consist of monthly maintenance fees, business account analysis fees, business online banking fees, check order charges, and other deposit account-related fees. Performance obligations for monthly maintenance fees and account analysis fees are satisfied, and the related revenue recognized, when we complete our performance obligation each month. Performance obligations related to transaction-based services (such as check orders) are satisfied, and the related revenue recognized, at a point in time when completed, except for business accounts subject to analysis where the transaction-based fees are part of the monthly account analysis fees.

• Debit card interchange fees - We issue debit cards to our consumer and small business customers that allow them to purchase goods and services from merchants in person, online, or via mobile devices using funds held in their demand deposit accounts held with us. Debit cards issued to our customers are part of global electronic payment networks (such as Visa) who pass a portion of the merchant interchange fees to debit card-issuing member banks like us when our customers make purchases through their networks. Performance obligations for debit card services are satisfied and revenue is recognized daily as the payment networks process transactions. Because we act in an agent capacity, we determined that network costs previously recorded as a component of non-interest expense should be netted with interchange fees recorded in non-interest income. Network costs were immaterial for the six months ended June 30, 2018 and 2017.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU make improvements to accounting standards related to financial instruments, including the following:

• Requires equity investments, except for those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

• Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When impairment exists, an entity is required to measure the investment at fair value.

• Eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value required under current standards for financial instruments measured at amortized cost on the consolidated balance sheet.

• Requires public companies to use the exit price notion when measuring and disclosing the fair value of financial instruments.

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements.

• Clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets.

We adopted the requirements of this ASU effective January 1, 2018, which did not have a material impact on our financial condition and results of operations. The fair value of our loans held for investment, which is recorded at amortized cost, now incorporates the exit price notion reflecting factors such as a liquidity premium. See Note 3, Fair Value of Assets and Liabilities.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on how to present and classify eight specific cash flow topics in the statement of cash flows. The ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The amendments should be applied using a retrospective transition method to each period presented, if practical. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures for the periods presented.

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The amendments are intended to help companies evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses and provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments should be applied prospectively and are effective for annual periods after December 31, 2017, including interim periods within those periods. We adopted the amendments effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures in the first quarter of 2018.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. This ASU applies to entities that change the terms or conditions of a share-based payment award. The FASB adopted this ASU to provide clarity in what constitutes a modification and to reduce diversity in practice in applying Topic 718. In order for a change to a share-based arrangement to not require Topic 718 modification accounting treatment, all of the following must be met: no change in fair value, no change in vesting conditions and no change in the balance sheet classification of the modified award. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted, including adoption in an interim period. The amendments should be applied prospectively to an award modified on or after the adoption date. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operation, or related financial statement disclosures.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This amendment changes both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. It is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting and increase transparency as to the scope and results of hedging programs. The ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We early-adopted the amendments of this ASU in the second quarter of 2018, and elected to perform hedge effectiveness assessments using a qualitative approach instead of quantitative regression analysis going forward. The adoption of this ASU had an immaterial impact to our financial results. The amendments also require additional disclosures, which are included in Note 9, Derivative Financial Instruments and Hedging Activities.

In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This amendment helps organizations address certain stranded income tax effects in accumulated other comprehensive income (AOCI) resulting from the enactment of the Tax Cuts and Jobs Act of 2017. The ASU requires financial statement preparers to disclose a description of the accounting policy for releasing income tax effects from AOCI, whether or not they elect to reclassify the stranded income tax effects from the Tax Cuts and Jobs Act of 2017, and information about the other income tax effects that are reclassified. The amendments are effective for all organizations for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The amendments in this ASU should be applied in either the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. We early adopted this ASU in the first quarter of 2018. See Note 7, Stockholders' Equity.

Accounting Standards Not Yet Effective

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The amendments in this ASU intend to increase transparency and comparability among organizations by recognizing an asset, which represents the right to use the asset for the lease term, and a lease liability, which is a lessee's obligation to make lease payments measured on a discounted basis. This ASU generally applies to leasing arrangements exceeding a twelve-month term. ASU 2016-02 is effective for annual periods, including interim periods within those annual periods beginning after December 15, 2018 and requires a modified retrospective method of adoption. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which provides various corrections and clarifications to ASU 2016-02. Early application of the amendments is permitted. We intend to adopt this ASU during the first quarter of 2019, as required. We completed an inventory of our lease agreements and continue to evaluate potential accounting software solutions that will aid in the transition to the new leasing guidance. As of June 30, 2018, our undiscounted operating lease obligations that were off-balance sheet totaled $16.5 million (See Note 8, Commitments and Contingencies). Upon adoption of this ASU, the present values of leases currently classified as operating leases will be recognized as lease assets and liabilities on our consolidated balance sheets. Additional disclosures of key information about our leasing arrangements will also be required. We do not expect that the ASU will have a material impact on our capital ratios or return on average assets when adopted and we are currently evaluating the effect that the ASU will have on other components of our financial condition and results of operations.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Under the new guidance, entities will be required to present financial assets at the net amount expected to be collected. The measurement of expected credit losses will be based on historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of a credit over its remaining life. In addition, the ASU amends the accounting for expected credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have formed an internal Current Expected Credit Loss ("CECL") committee and are working with our third party vendor to determine the appropriate methodologies and resources to utilize in preparation for transition to the new accounting standards. The impact of this ASU on our financial condition and results of operations is not known at this time.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. This update simplifies the accounting for share-based payment transactions for acquiring goods and services from nonemployees, applying some of the same requirements as employee share-based payment transactions. The ASU will not affect the accounting for share-based payment awards to nonemployee directors, which will continue to be treated as employee share-based transactions under the current standards. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We do not expect that the ASU will have a material impact on our financial condition or results of operations, as it is not our practice to issue stock-based awards to pay for goods and services from nonemployees, other than nonemployee directors.

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Fair Value of Assets and Liabilities

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities

Fair Value of Assets and Liabilities

Fair Value Hierarchy and Fair Value Measurement

We group our assets and liabilities that are measured at fair value in three levels within the fair value hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

Level 1: Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuations for which all significant assumptions are observable or can be corroborated by observable market data.

Level 3: Valuations are based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Values are determined using pricing models and discounted cash flow models and may include significant Management judgment and estimation.

Transfers between levels of the fair value hierarchy are recognized through our monthly and/or quarterly valuation process in the reporting period during which the event or circumstances that caused the transfer occurred.

The following table summarizes our assets and liabilities that were required to be recorded at fair value on a recurring basis.

(in thousands)   Description of Financial Instruments	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)		Measurement Categories: Changes in Fair Value Recorded In1
June 30, 2018
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	240,794	$	—	$	240,794	$	—	OCI
SBA-backed securities	23,954		—		23,954		—		OCI
Debentures of government sponsored agencies	32,139		—		32,139		—		OCI
Privately-issued collateralized mortgage obligations	435		—		435		—		OCI
Obligations of state and political subdivisions	87,788		—		87,788		—		OCI
Corporate bonds	3,027		—		3,027		—		OCI
Derivative financial assets (interest rate contracts)	327		—		327		—		NI
Derivative financial liabilities (interest rate contracts)	276		—		276		—		NI
December 31, 2017
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	188,061	$	—	$	188,061	$	—	OCI
SBA-backed securities	25,982		—		25,817		165		OCI
Debentures of government sponsored agencies	12,938		—		12,938		—		OCI
Privately-issued collateralized mortgage obligations	1,431		—		1,431		—		OCI
Obligations of state and political subdivisions	97,491		—		97,491		—		OCI
Corporate bonds	6,564		—		6,564		—		OCI
Derivative financial assets (interest rate contracts)	74		—		74		—		NI
Derivative financial liabilities (interest rate contracts)	740		—		740		—		NI

 ¹ Other comprehensive income ("OCI") or net income ("NI").

Securities available-for-sale are recorded at fair value on a recurring basis. When available, quoted market prices (Level 1) are used to determine the fair value of securities available-for-sale. If quoted market prices are not available, we obtain pricing information from a reputable third-party service provider, who may utilize valuation techniques that use current market-based or independently sourced parameters, such as bid/ask prices, dealer-quoted prices, interest rates, benchmark yield curves, prepayment speeds, probability of default, loss severity and credit spreads (Level 2).   Level 2 securities include obligations of state and political subdivisions, U.S. agencies or government-sponsored agencies' debt securities, mortgage-backed securities, government agency-issued, privately-issued collateralized mortgage obligations, and corporate bonds. As of June 30, 2018 and December 31, 2017, there were no Level 1 securities. As of December 31, 2017, we had one Level 3 available-for-sale U.S. government agency obligation, which was paid off during the second quarter of 2018.

Securities held-to-maturity may be written down to fair value (determined using the same techniques discussed above for securities available-for-sale) as a result of other-than-temporary impairment, and we did not record any write-downs during the six months ended June 30, 2018 or June 30, 2017.

On a recurring basis, derivative financial instruments are recorded at fair value, which is based on the income approach using observable Level 2 market inputs, reflecting market expectations of future interest rates as of the measurement date.  Standard valuation techniques are used to calculate the present value of the future expected cash flows assuming an orderly transaction.  Valuation adjustments may be made to reflect both our own credit risk and the counterparties’ credit risk in determining the fair value of the derivatives. Level 2 inputs for the valuations are limited to observable market prices for London Interbank Offered Rate ("LIBOR") and Overnight Index Swap ("OIS") rates (for the very short term), quoted prices for LIBOR futures contracts, observable market prices for LIBOR and OIS swap rates, and one-month and three-month LIBOR basis spreads at commonly quoted intervals.  Mid-market pricing of the inputs is used as a practical expedient in the fair value measurements.  We project spot rates at reset days specified by each swap contract to determine future cash flows, then discount to present value using either LIBOR or OIS curves depending on whether the swap positions are fully collateralized as of the measurement date.  When the value of any collateral placed with counterparties is less than the interest rate derivative liability, a credit valuation adjustment ("CVA") is applied to reflect the credit risk we pose to counterparties.  We have used the spread between the Standard & Poor's BBB rated U.S. Bank Composite rate and LIBOR for the closest maturity term corresponding to the duration of the swaps to derive the CVA. A similar credit risk adjustment, correlated to the credit standing of the counterparty, is made when collateral posted by the counterparty does not fully cover their liability to the Bank. For further discussion on our methodology in valuing our derivative financial instruments, refer to Note 9, Derivative Financial Instruments and Hedging Activities.

Certain financial assets may be measured at fair value on a non-recurring basis. These assets are subject to fair value adjustments that result from the application of the lower of cost or fair value accounting or write-downs of individual assets, such as impaired loans that are collateral dependent and other real estate owned ("OREO"). As of June 30, 2018 and December 31, 2017, we did not carry any assets measured at fair value on a non-recurring basis.

Disclosures about Fair Value of Financial Instruments

The following table summarizes fair value estimates for financial instruments as of June 30, 2018 and December 31, 2017, excluding financial instruments recorded at fair value on a recurring basis (summarized in the first table in this note). The carrying amounts in the following table are recorded in the consolidated statements of condition under the indicated captions. Further, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements such as bank-owned life insurance policies ("BOLI") and non-maturity deposit liabilities. Additionally, we hold shares of FHLB stock and Visa Inc. Class B common stock at cost. These shares are restricted from resale, except among member banks, and their values are discussed in Note 4, Investment Securities.

	June 30, 2018					December 31, 2017
(in thousands)	Carrying Amounts		Fair Value		Fair Value Hierarchy	Carrying Amounts		Fair Value		Fair Value Hierarchy
Financial assets (recorded at amortized cost)
Cash and cash equivalents	$	83,855	$	83,855	Level 1	$	203,545	$	203,545	Level 1
Investment securities held-to-maturity	170,652		166,127		Level 2	151,032		151,032		Level 2
Loans, net	1,701,798		1,666,409		Level 3	1,663,246		1,650,198		Level 3
Interest receivable	7,814		7,814		Level 2	7,501		7,501		Level 2
Financial liabilities (recorded at amortized cost)
Time deposits	137,040		136,023		Level 2	160,116		159,540		Level 2
Subordinated debentures	5,802		6,988		Level 3	5,739		5,118		Level 3
Interest payable	167		167		Level 2	191		191		Level 2

Commitments - The value of unrecognized financial instruments is estimated based on the fee income associated with the commitments which, in the absence of credit exposure, is considered to approximate their settlement value. The fair value of commitment fees was not material at June 30, 2018 and December 31, 2017.

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Investment Securities

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

Our investment securities portfolio consists of obligations of state and political subdivisions, corporate bonds, U.S. government agency securities, including residential and commercial mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Small Business Administration ("SBA"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, and privately issued CMOs, as reflected in the following table.

	June 30, 2018									December 31, 2017
	Amortized		Fair		Gross Unrealized					Amortized		Fair		Gross Unrealized
(in thousands)	Cost		Value		Gains		(Losses)			Cost		Value		Gains		(Losses)
Held-to-maturity:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	$	94,203	$	90,824	$	—	$	(3,379	)	$	100,376	$	100,096	$	234	$	(514	)
SBA-backed securities	8,882		8,743		—		(139		)	—		—		—		—
CMOs issued by FNMA	11,881		11,766		—		(115		)	—		—		—		—
CMOs issued by FHLMC	34,668		33,591		—		(1,077		)	31,010		30,938		2		(74		)
CMOs issued by GNMA	3,730		3,713		—		(17		)	—		—		—		—
Obligations of state and political subdivisions	17,288		17,490		235		(33		)	19,646		19,998		383		(31		)
Total held-to-maturity	170,652		166,127		235		(4,760		)	151,032		151,032		619		(619		)
Available-for-sale:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	90,082		87,590		17		(2,509		)	65,559		65,262		126		(423		)
SBA-backed securities	24,620		23,954		—		(666		)	25,979		25,982		58		(55		)
CMOs issued by FNMA	21,026		20,571		7		(462		)	35,340		35,125		33		(248		)
CMOs issued by FHLMC	123,359		120,411		1		(2,949		)	70,514		69,889		3		(628		)
CMOs issued by GNMA	12,641		12,222		2		(421		)	17,953		17,785		26		(194		)
Debentures of government- sponsored agencies	32,395		32,139		—		(256		)	12,940		12,938		3		(5		)
Privately issued CMOs	431		435		4		—			1,432		1,431		1		(2		)
Obligations of state and political subdivisions	89,699		87,788		77		(1,988		)	98,027		97,491		298		(834		)
Corporate bonds	3,015		3,027		24		(12		)	6,541		6,564		26		(3		)
Total available-for-sale	397,268		388,137		132		(9,263		)	334,285		332,467		574		(2,392		)
Total investment securities	$	567,920	$	554,264	$	367	$	(14,023	)	$	485,317	$	483,499	$	1,193	$	(3,011	)

The amortized cost andfair value of investment debt securities by contractual maturity at June 30, 2018 and December 31, 2017 are shown in the following table. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties.

	June 30, 2018								December 31, 2017
	Held-to-Maturity				Available-for-Sale				Held-to-Maturity				Available-for-Sale
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Within one year	$	2,859	$	2,882	$	8,272	$	8,263	$	2,151	$	2,172	$	10,268	$	10,272
After one but within five years	13,063		13,147		79,662		78,514		15,577		15,791		71,576		71,237
After five years through ten years	63,321		61,350		216,584		210,650		54,641		54,554		129,723		128,954
After ten years	91,409		88,748		92,750		90,710		78,663		78,515		122,718		122,004
Total	$	170,652	$	166,127	$	397,268	$	388,137	$	151,032	$	151,032	$	334,285	$	332,467

Sales of investment securities and gross gains and losses are shown in the following table.

	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Available-for-sale:
Sales proceeds	$	5,006		$	1,321		$	5,006		$	1,321
Gross realized gains	27			13			27			13
Gross realized losses	(16		)	(3		)	(16		)	(3		)

Pledged investment securities are shown in the following table.

(in thousands)	June 30, 2018		December 31, 2017
Pledged to the State of California:
Secure public deposits in compliance with the Local Agency Security Program	$	103,097	$	107,829
Collateral for trust deposits	749		761
Total investment securities pledged to the State of California	$	103,846	$	108,590
Collateral for Wealth Management and Trust Services checking account	$	2,014	$	2,026

As part of our ongoing review of our investment securities portfolio, we reassessed the classification of certain securities issued by government sponsored agencies. During 2018 and 2017, we transferred $27.4 million and $129.0 million, respectively, of these securities from available-for-sale to held-to-maturity at fair value. We intend and have the ability to hold these securities to maturity. The net unrealized pre-tax loss of $278 thousand and $3.0 million, at the respective transfer dates, remained in accumulated other comprehensive income and are amortized over the remaining lives of the securities. Amortization of the net unrealized pre-tax losses totaled $268 thousand and $165 thousand for the six months ended June 30, 2018 and 2017, respectively.

Other-Than-Temporarily Impaired ("OTTI") Debt Securities

We have evaluated the credit of our investment securities and their issuers and/or insurers. Based on our evaluation, Management has determined that no investment security in our investment portfolio is other-than-temporarily impaired as of June 30, 2018. We do not have the intent and it is more likely than not that we will not have to sell the remaining securities temporarily impaired at June 30, 2018 before recovery of the amortized cost basis.

There were 266 and 198investment securities in unrealized loss positions at June 30, 2018 and December 31, 2017, respectively. Those securities are summarized and classified according to the duration of the loss period in the following tables:

June 30, 2018	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
MBS pass-through securities issued by FHLMC and FNMA	$	22,100	$	(830	)	$	68,724	$	(2,549	)	$	90,824	$	(3,379	)
SBA-backed securities	8,742		(139		)	—		—			$	8,742	$	(139	)
CMOs issued by FNMA	11,766		(115		)	—		—			11,766		(115		)
CMOs issued by FHLMC	19,798		(564		)	13,793		(513		)	33,591		(1,077		)
CMOs issued by GNMA	—		—			3,713		(17		)	3,713		(17		)
Obligations of state and political subdivisions	3,816		(33		)	—		—			3,816		(33		)
Total held-to-maturity	66,222		(1,681		)	86,230		(3,079		)	152,452		(4,760		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	68,906		(1,843		)	17,713		(666		)	86,619		(2,509		)
SBA-backed securities	23,954		(666		)	—		—			23,954		(666		)
CMOs issued by FNMA	15,687		(321		)	4,642		(141		)	20,329		(462		)
CMOs issued by FHLMC	115,370		(2,949		)	—		—			115,370		(2,949		)
CMOs issued by GNMA	11,297		(419		)	603		(2		)	11,900		(421		)
Debentures of government- sponsored agencies	32,139		(256		)	—		—			32,139		(256		)
Privately issued CMOs	—		—			—		—			—		—
Obligations of state and political subdivisions	57,217		(835		)	18,832		(1,153		)	76,049		(1,988		)
Corporate bonds	1,522		(12		)	—		—			1,522		(12		)
Total available-for-sale	326,092		(7,301		)	41,790		(1,962		)	367,882		(9,263		)
Total temporarily impaired securities	$	392,314	$	(8,982	)	$	128,020	$	(5,041	)	$	520,334	$	(14,023	)

December 31, 2017	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
Obligations of state and political subdivisions	$	3,648	$	(31	)	$	—	$	—		$	3,648	$	(31	)
MBS pass-through securities issued by FHLMC and FNMA	16,337		(143		)	46,845		(371		)	63,182		(514		)
CMOs issued by FHLMC	11,066		(31		)	13,824		(43		)	24,890		(74		)
Total held-to-maturity	31,051		(205		)	60,669		(414		)	91,720		(619		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	32,189		(121		)	15,325		(302		)	47,514		(423		)
SBA-backed securities	11,028		(53		)	165		(2		)	11,193		(55		)
CMOs issued by FNMA	26,401		(171		)	5,440		(77		)	31,841		(248		)
CMOs issued by FHLMC	69,276		(628		)	—		—			69,276		(628		)
CMOs issued by GNMA	14,230		(194		)	—		—			14,230		(194		)
Debentures of government- sponsored agencies	2,984		(5		)	—		—			2,984		(5		)
Privately issued CMO's	1,310		(2		)	—		—			1,310		(2		)
Obligations of state and political subdivisions	52,197		(288		)	19,548		(546		)	71,745		(834		)
Corporate bonds	3,060		(3		)	—		—			3,060		(3		)
Total available-for-sale	212,675		(1,465		)	40,478		(927		)	253,153		(2,392		)
Total temporarily impaired securities	$	243,726	$	(1,670	)	$	101,147	$	(1,341	)	$	344,873	$	(3,011	)

As of June 30, 2018, sixty-four investment securities in our portfolio had been in a continuous loss position for twelve months or more. They consisted of five CMOs issued by FHLMC, three CMOs issued by FNMA, two CMOs issued by GNMA, twenty-two agency MBS securities and thirty-two obligations of U.S. state and political subdivisions securities. We have evaluated the securities and believe that the decline in fair value is primarily driven by factors other than credit. It is probable that we will be able to collect all amounts due according to the contractual terms and no other-than-temporary impairment exists on these securities. The debenture of government-sponsored agency security is supported by the U.S. Federal Government, which protects us from credit losses. Based upon our assessment of the credit fundamentals, we concluded that these securities were not other-than-temporarily impaired at June 30, 2018.

There were two hundred one investment securities in our portfolio that had been in temporary loss positions for less than twelve months as of June 30, 2018, and their temporary loss positions mainly arose from changes in interest rates since purchase. They consisted of eleven SBA-backed securities, eight debentures of a U.S. government-sponsored agency, ninety-eight obligations of U.S. state and political subdivisions, thirty-six MBS securities, forty-six CMOs issued by government-sponsored agencies, and three corporate bonds. Securities of government-sponsored agencies are supported by the U.S. Federal Government, which protects us from credit losses. Other temporarily impaired securities are deemed creditworthy after internal analysis of the issuers' latest financial information and credit enhancement. Additionally, all are rated as investment grade by at least one major rating agency. As a result of this impairment analysis, we concluded that these securities were not other-than-temporarily impaired at June 30, 2018.

Non-Marketable Securities

As a member of the FHLB, we are required to maintain a minimum investment in FHLB capital stock determined by the Board of Directors of the FHLB. The minimum investment requirements can increase in the event we increase our total asset size or borrowings with the FHLB. Shares cannot be purchased or sold except between the FHLB and its members at the $100 per share par value. We held $11.1 million of FHLB stock recorded at cost in other assets in the consolidated statements of condition at both June 30, 2018 and December 31, 2017. The carrying amounts of these investments are reasonable estimates of fair value because the securities are restricted to member banks and they do not have a readily determinable market value. Management does not believe that the FHLB stock is other-than-temporarily-impaired, due to FHLB's current financial condition. On July 26, 2018, FHLB announced a cash dividend to be distributed in mid-August 2018 at an annualized dividend rate of 7.00%. Cash dividends paid on FHLB capital stock are recorded as non-interest income.

As a member bank of Visa U.S.A., we hold 16,939 shares of Visa Inc. Class B common stock with a carrying value of zero, which is equal to our cost basis. These shares are restricted from resale until their conversion into Class A (voting) shares upon the termination of Visa Inc.'s Covered Litigation escrow account. Because of the restriction, these shares are not considered available-for-sale and are not carried at fair value. When converting this Class B common stock to Class A common stock based on the conversion rate of 1.6298 as of June 30, 2018 and 1.6483 as of December 31, 2017, and the closing stock price of Class A shares, the value of our shares of Class B common stock would have been $3.7 million and $3.2 million at June 30, 2018 and December 31, 2017, respectively. The conversion rate is subject to further reduction upon the final settlement of the covered litigation against Visa Inc. and its member banks. As such, the fair value of these Class B shares can differ significantly from their if-converted values. For further information, refer to Note 8, Commitments and Contingencies.

We invest in low-income housing tax credit funds as a limited partner, which totaled $4.9 million and $2.1 million recorded in other assets as of June 30, 2018 and December 31, 2017, respectively. In the first six months of 2018, we recognized $282 thousand of low-income housing tax credits and other tax benefits, net of $237 thousand of amortization expense of low-income housing tax credit investment, as a component of income tax expense. As of June 30, 2018, our unfunded commitments for these low-income housing tax credit funds totaled $3.2 million. We did not recognize any impairment losses on these low-income housing tax credit investments during the six months ended June 30, 2018 or 2017, as the value of the future tax benefits exceeds the carrying value of the investments.

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Loans and Allowance for Loan Losses

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Loans and Allowance for Loan Losses

Loans and Allowance for Loan Losses

Credit Quality of Loans

The following table shows outstanding loans by class and payment aging as of June 30, 2018 and December 31, 2017.

Loan Aging Analysis by Loan Class
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential 1		Installment and other consumer		Total
June 30, 2018
30-59 days past due	$	—	$	—	$	—	$	—	$	77	$	—	$	11	$	88
60-89 days past due	—		—		—		—		—		—		—		—
90 days or more past due	—		—		—		—		—		—		—		—
Total past due	—		—		—		—		77		—		11		88
Current	241,994		317,587		839,667		57,015		125,954		108,829		26,477		1,717,523
Total loans 3	$	241,994	$	317,587	$	839,667	$	57,015	$	126,031	$	108,829	$	26,488	$	1,717,611
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	385	$	—	$	—	$	385
December 31, 2017
30-59 days past due	$	—	$	—	$	—	$	—	$	99	$	255	$	330	$	684
60-89 days past due	1,340		—		—		—		—		—		—		1,340
90 days or more past due	—		—		—		—		307		—		—		307
Total past due	1,340		—		—		—		406		255		330		2,331
Current	234,495		300,963		822,984		63,828		132,061		95,271		27,080		1,676,682
Total loans 3	$	235,835	$	300,963	$	822,984	$	63,828	$	132,467	$	95,526	$	27,410	$	1,679,013
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	406	$	—	$	—	$	406

¹ Our residential loan portfolio does not include sub-prime loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages", the characteristics of which are loans lacking full documentation, borrowers having low FICO scores or higher loan-to-value ratios.

²One purchased credit impaired ("PCI") loan with an unpaid balance of $6 thousand and no carrying value was not accreting interest at June 30, 2018. Three PCI loans with unpaid balances totaling $131 thousand and no carrying values were not accreting interest at December 31, 2017. Amounts exclude accreting PCI loans totaling $2.1 million at both June 30, 2018 and December 31, 2017 as we have a reasonable expectation about future cash flows to be collected and we continue to recognize accretable yield on these loans in interest income. There were no accruing loans past due more than ninety days at June 30, 2018 or December 31, 2017.

³ Amounts include net deferred loan origination costs of $800 thousand and $818 thousand at June 30, 2018 and December 31, 2017, respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $956 thousand and $1.2 million at June 30, 2018 and December 31, 2017, respectively.

We generally make commercial loans to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and acquisitions.  Management examines historical, current, and projected cash flows to determine the ability of the borrower to repay obligations as agreed. Commercial loans are made based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral and guarantor support. The cash flows of borrowers, however, may not occur as expected, and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed, such as accounts receivable and inventory, and typically include personal guarantees. We target stable businesses with guarantors who provide additional sources of repayment and have proven to be resilient in periods of economic stress.

Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans discussed above. We underwrite these loans to be repaid from cash flow and to be supported by real property collateral. Underwriting standards for commercial real estate loans include, but are not limited to, debt coverage and loan-to-value ratios. Furthermore, the owners of the properties guarantee substantially all of our commercial real estate loans.  Conditions in the real estate markets or in the general economy may adversely affect our commercial real estate loans. In the event of a vacancy, we expect guarantors to carry the loans until they find a replacement tenant.  The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio.

We generally make construction loans to developers and builders to finance construction, renovation and occasionally land acquisitions in anticipation of near-term development. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. Significant events can affect the construction industry, including: the inherent volatility of real estate markets and vulnerability to delays due to weather, change orders, inability to obtain construction permits, labor or material shortages, and price changes. Estimates of construction costs and value associated with the completed project may be inaccurate. Repayment of construction loans is largely dependent on the ultimate success of the project.

Consumer loans primarily consist of home equity lines of credit, other residential loans and floating homes, along with a small number of installment loans. Our other residential loans include tenancy-in-common fractional interest loans ("TIC") located almost entirely in San Francisco County. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification among consumer loan types, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk.

We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and in the loan portfolio. Our definitions of “Special Mention” risk graded loans, or worse, are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC").  Our internally assigned grades are as follows:

Pass and Watch: Loans to borrowers of acceptable or better credit quality. Borrowers in this category demonstrate fundamentally sound financial positions, repayment capacity, credit history, and management expertise.  Loans in this category must have an identifiable and stable source of repayment and meet the Bank’s policy regarding debt-service-coverage ratios.  These borrowers are capable of sustaining normal economic, market or operational setbacks without significant financial consequences.  Negative external industry factors are generally not present.  The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period.

Special Mention: Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification.

Substandard: Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies.

Doubtful: Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on non-accrual status and usually are collateral-dependent.

We regularly review our credits for accuracy of risk grades whenever we receive new information. Borrowers are generally required to submit financial information at regular intervals. Typically, commercial borrowers with lines of credit are required to submit financial information with reporting intervals ranging from monthly to annually depending on credit size, risk and complexity. In addition, investor commercial real estate borrowers are usually required to submit rent rolls or property income statements annually. We monitor construction loans monthly and review them on an ongoing basis. We review home equity and other consumer loans based on delinquency status. We also review loans graded “Watch” or worse, regardless of loan type, no less than quarterly.

The following table represents an analysis of the carrying amount in loans, net of deferred fees and costs and purchase premiums or discounts, by internally assigned risk grades, including PCI loans, at June 30, 2018 and December 31, 2017.

Credit Risk Profile by Internally Assigned Risk Grade
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Purchased credit-impaired		Total
June 30, 2018
Pass	$	224,707	$	299,469	$	836,634	$	54,324	$	124,103	$	108,829	$	26,389	$	2,140	$	1,676,595
Special Mention	14,842		8,904		2,232		—		1,121		—		—		—		27,099
Substandard	2,403		8,005		—		2,691		719		—		99		—		13,917
Total loans	$	241,952	$	316,378	$	838,866	$	57,015	$	125,943	$	108,829	$	26,488	$	2,140	$	1,717,611
December 31, 2017
Pass	$	214,636	$	281,104	$	818,570	$	60,859	$	130,558	$	95,526	$	27,287	$	1,325	$	1,629,865
Special Mention	9,318		9,284		1,850		—		—		—		—		790		21,242
Substandard	11,816		9,409		1,774		2,969		1,815		—		123		—		27,906
Total loans	$	235,770	$	299,797	$	822,194	$	63,828	$	132,373	$	95,526	$	27,410	$	2,115	$	1,679,013

Troubled Debt Restructuring

Our loan portfolio includes certain loans modified in a troubled debt restructuring (“TDR”), where we have granted economic concessions to borrowers experiencing financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. TDRs on non-accrual status at the time of restructure may be returned to accruing status after Management considers the borrower’s sustained repayment performance for a reasonable period, generally six months, and obtains reasonable assurance of repayment and performance.

We may remove a loan from TDR designation if it meets all of the following conditions:

• The loan is subsequently refinanced or restructured at current market interest rates and the new terms are consistent with the treatment of creditworthy borrowers under regular underwriting standards;

• The borrower is no longer considered to be in financial difficulty;

• Performance on the loan is reasonably assured; and;

• Existing loan did not have any forgiveness of principal or interest.

The same Management level that approved the upgrading of the loan classification must approve the removal of TDR status. During the six months ended June 30, 2018, one TIC loan with a recorded investment of $150 thousand was removed from TDR designation after meeting all of the conditions noted above. There were no loans removed from TDR designation during 2017.

The following table summarizes the carrying amount of TDR loans by loan class as of June 30, 2018 and December 31, 2017.

(in thousands)
Recorded investment in Troubled Debt Restructurings 1	June 30, 2018		December 31, 2017
Commercial and industrial	$	1,917	$	2,165
Commercial real estate, owner-occupied	7,002		6,999
Commercial real estate, investor	1,844		2,171
Construction	2,691		2,969
Home equity	348		347
Other residential	988		1,148
Installment and other consumer	704		721
Total	$	15,494	$	16,520

¹ There were no TDR loans on non-accrual status at June 30, 2018 and December 31, 2017.

The following table presents information for loans modified in a TDR during the presented periods, including the number of modified contracts, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented.

(dollars in thousands)	Number of Contracts Modified	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment at Period End
TDRs during the three months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the three months ended June 30, 2017:
None	—	$	—	$	—	$	—

TDRs during the six months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the six months ended June 30, 2017:
Installment and consumer	1	$	50	$	50	$	49

The two loans that were modified during the six months ended June 30, 2018 were to the same borrower and included loan extensions and other changes in loan terms. The modification during the six months endedJune 30, 2017 primarily involved an interest rate concession and other changes to loan terms. During the first six months of 2018 and 2017, there were no defaults on loans that had been modified in a TDR within the prior twelve-month period. We report defaulted TDRs based on a payment default definition of more than ninety days past due.

Impaired Loans

The following tables summarize information by class on impaired loans and their related allowances. Total impaired loans include non-accrual loans, accruing TDR loans and accreting PCI loans that have experienced post-acquisition declines in cash flows expected to be collected.

(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
June 30, 2018
Recorded investment in impaired loans:
With no specific allowance recorded	$	306	$	—	$	—	$	2,691	$	385	$	989	$	46	$	4,417
With a specific allowance recorded	1,611		7,002		1,844		—		347		—		658		11,462
Total recorded investment in impaired loans	$	1,917	$	7,002	$	1,844	$	2,691	$	732	$	989	$	704	$	15,879
Unpaid principal balance of impaired loans	$	1,905	$	6,993	$	1,837	$	2,688	$	729	$	987	$	703	$	15,842
Specific allowance	232		126		47		—		6		—		92		503
Average recorded investment in impaired loans during the quarter ended June 30, 2018	2,092		7,005		1,849		2,833		736		990		708		16,213
Interest income recognized on impaired loans during the quarter ended June 30, 20181	28		66		20		37		5		13		8		177
Average recorded investment in impaired loans during the six months ended June 30, 2018	2,104		7,003		1,956		2,878		742		1,043		712		16,438
Interest income recognized on impaired loans during the six months ended June 30, 2018 1	183		132		42		75		10		26		15		483
Average recorded investment in impaired loans during the quarter ended June 30, 2017	2,072		7,000		3,283		3,240		642		1,173		943		18,353
Interest income recognized on impaired loans during the quarter ended June 30, 20171	25		66		20		37		7		14		10		179
Average recorded investment in impaired loans during the six months ended June 30, 2017	2,117		6,998		2,941		3,241		667		1,437		939		18,340
Interest income recognized on impaired loans during the six months ended June 30, 2017 1	48		132		43		71		14		34		20		362

¹ No interest income on impaired loans was recognized on a cash basis during the three months ended June 30, 2018. Interest income recognized on a cash basis totaled $128 thousand during the six months ended June 30, 2018 and was primarily related to the pay-off of two non-accrual commercial PCI loans. No interest income on impaired loans was recognized on a cash basis during the three and six months ended June 30, 2017.

(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
December 31, 2017
Recorded investment in impaired loans:
With no specific allowance recorded	$	309	$	—	$	—	$	2,689	$	406	$	995	$	46	$	4,445
With a specific allowance recorded	1,856		6,999		2,171		280		347		153		675		12,481
Total recorded investment in impaired loans	$	2,165	$	6,999	$	2,171	$	2,969	$	753	$	1,148	$	721	$	16,926
Unpaid principal balance of impaired loans	$	2,278	$	6,993	$	2,168	$	2,963	$	750	$	1,147	$	720	$	17,019
Specific allowance	$	50	$	188	$	159	$	7	$	6	$	1	$	102	$	513

Management monitors delinquent loans continuously and identifies problem loans, generally loans graded Substandard or worse, loans on non-accrual status and loans modified in a TDR, to be evaluated individually for impairment. Generally, the recorded investment in impaired loans is net of any charge-offs from estimated losses related to specifically identified impaired loans when they are deemed uncollectible. There were no charged-off amounts on impaired loans at June 30, 2018 or December 31, 2017. In addition, the recorded investment in impaired loans is net of purchase discounts or premiums on acquired loans and deferred fees and costs. At June 30, 2018 and December 31, 2017, unused commitments to extend credit on impaired loans, including performing loans to borrowers whose terms have been modified in TDRs, totaled $850 thousand and $935 thousand, respectively.

The following tables disclose activity in the allowance for loan losses ("ALLL") and the recorded investment in loans by class, as well as the related ALLL disaggregated by impairment evaluation method.

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Three months ended June 30, 2018
Beginning balance	$	3,693		$	2,080	$	6,455		$	697		$	979		$	543	$	351		$	973		$	15,771
Provision (reversal)	(1,098		)	259		935			(189		)	(27		)	203		(66		)	(17		)	—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	5			—		—			—			—			—		42			—			47
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Three months ended June 30, 2017
Beginning balance	$	4,413		$	1,992	$	6,133		$	546		$	990		$	444	$	359		$	342		$	15,219
Provision (reversal)	(490		)	90		(68		)	(135		)	(9		)	65		(23		)	570			—
Charge-offs	—			—		—			—			—			—		—			—			—
Recoveries	9			—		—			—			—			—		4			—			13
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Six months ended June 30, 2018
Allowance for loan losses:
Beginning balance	$	3,654		$	2,294	$	6,475		$	681		$	1,031		$	536	$	378		$	718		$	15,767
Provision (reversal)	(1,063		)	45		915			(173		)	(79		)	210		(93		)	238			—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	9			—		—			—			—			—		42			—			51
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Six months ended June 30, 2017
Allowance for loan losses:
Beginning balance	$	3,248		$	1,753	$	6,320		$	781		$	973		$	454	$	372		$	1,541		$	15,442
Provision (reversal)	896			329		(255		)	(370		)	8			55		(34		)	(629		)	—
Charge-offs	(284		)	—		—			—			—			—		(3		)	—			(287		)
Recoveries	72			—		—			—			—			—		5			—			77
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
June 30, 2018
Ending ALLL related to loans collectively evaluated for impairment	$	2,365		$	2,213		$	7,343		$	508		$	946		$	746		$	233		$	956	$	15,310
Ending ALLL related to loans individually evaluated for impairment	232			126			47			—			6			—			92			—		503
Ending ALLL related to purchased credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	2,597		$	2,339		$	7,390		$	508		$	952		$	746		$	325		$	956	$	15,813
Recorded Investment:
Collectively evaluated for impairment	$	240,035		$	309,376		$	837,022		$	54,324		$	125,211		$	107,840		$	25,784		$	—	$	1,699,592
Individually evaluated for impairment	1,917			7,002			1,844			2,691			732			989			704			—		15,879
Purchased credit-impaired	42			1,209			801			—			88			—			—			—		2,140
Total	$	241,994		$	317,587		$	839,667		$	57,015		$	126,031		$	108,829		$	26,488		$	—	$	1,717,611
Ratio of allowance for loan losses to total loans	1.07		%	0.74		%	0.88		%	0.89		%	0.76		%	0.69		%	1.23		%	NM		0.92		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			247		%	NM			NM			NM		4,107		%

NM - Not Meaningful

Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
December 31, 2017
Ending ALLL related to loans collectively evaluated for impairment	$	3,604		$	2,106		$	6,316		$	674		$	1,025		$	535		$	276		$	718	$	15,254
Ending ALLL related to loans individually evaluated for impairment	50			188			159			7			6			1			102			—		513
Ending ALLL related to purchased  credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	3,654		$	2,294		$	6,475		$	681		$	1,031		$	536		$	378		$	718	$	15,767
Recorded Investment:
Collectively evaluated for impairment	$	233,605		$	292,798		$	820,023		$	60,859		$	131,620		$	94,378		$	26,689		$	—	$	1,659,972
Individually evaluated for impairment	2,165			6,999			2,171			2,969			753			1,148			721			—		16,926
Purchased credit-impaired	65			1,166			790			—			94			—			—			—		2,115
Total	$	235,835		$	300,963		$	822,984		$	63,828		$	132,467		$	95,526		$	27,410		$	—	$	1,679,013
Ratio of allowance for loan losses to total loans	1.55		%	0.76		%	0.79		%	1.07		%	0.78		%	0.56		%	1.38		%	NM		0.94		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			254		%	NM			NM			NM		3,883		%

NM - Not Meaningful

Purchased Credit-Impaired Loans

Acquired loans are considered credit-impaired if there is evidence of significant deterioration of credit quality since origination and it is probable, at the acquisition date, that we will be unable to collect all contractually required payments receivable. Management has determined certain loans purchased in our three bank acquisitions to be PCI loans based on credit indicators such as nonaccrual status, past due status, loan risk grade, loan-to-value ratio, etc. Revolving credit agreements (e.g., home equity lines of credit and revolving commercial loans) are not considered PCI loans as cash flows cannot be reasonably estimated.

The following table reflects the unpaid principal balance and related carrying value of PCI loans.

PCI Loans	June 30, 2018				December 31, 2017
(in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial and industrial	$	125	$	42	$	276	$	65
Commercial real estate, owner occupied	1,271		1,209		1,297		1,166
Commercial real estate, investor	1,049		801		1,064		790
Home equity	220		88		231		94
Total purchased credit-impaired loans	$	2,665	$	2,140	$	2,868	$	2,115

The activities in the accretable yield, or income expected to be earned over the remaining lives of the PCI loans were as follows:

Accretable Yield	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at beginning of period	$	1,142		$	1,386		$	1,254		$	1,476
Accretion	(83		)	(80		)	(195		)	(170		)
Balance at end of period	$	1,059		$	1,306		$	1,059		$	1,306

Pledged Loans

Our FHLB line of credit is secured under terms of a blanket collateral agreement by a pledge of certain qualifying loans with unpaid principal balances of $996.9 million and $887.9 million at June 30, 2018 and December 31, 2017, respectively. In addition, we pledge a certain residential loan portfolio, which totaled $80.0 million and $67.6 million at June 30, 2018 and December 31, 2017, respectively, to secure our borrowing capacity with the Federal Reserve Bank ("FRB"). Also, see Note 6, Borrowings.

Related Party Loans

The Bank has, and expects to have in the future, banking transactions in the ordinary course of its business with directors, officers, principal shareholders and their businesses or associates. These transactions, including loans, are granted on substantially the same terms, including interest rates and collateral on loans, as those prevailing at the same time for comparable transactions with persons not related to us. Likewise, these transactions do not involve more than the normal risk of collectability or present other unfavorable features. Related party loans totaled $12.3 million at June 30, 2018 compared to $11.9 million at December 31, 2017. In addition, undisbursed commitments to related parties totaled $8.6 million and $9.1 million at June 30, 2018 and December 31, 2017, respectively.

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Borrowings

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Borrowings

Borrowings

Federal Funds Purchased – The Bank had unsecured lines of credit with correspondent banks for overnight borrowing totaling $92.0 million at June 30, 2018 and $100.4 million at December 31, 2017.  In general, interest rates on these lines approximate the federal funds target rate. We had no overnight borrowings under these credit facilities at June 30, 2018 or December 31, 2017.

Federal Home Loan Bank Borrowings – As of June 30, 2018 and December 31, 2017, the Bank had lines of credit with the FHLB totaling $627.4 million and $538.9 million, respectively, based on eligible collateral of certain loans. There were no FHLB overnight borrowings at June 30, 2018or December 31, 2017.

Federal Reserve Line of Credit – The Bank has a line of credit with the FRBSF secured by certain residential loans.  At June 30, 2018 and December 31, 2017, the Bank had borrowing capacity under this line totaling $59.5 million and $52.1 million, respectively, and had no outstanding borrowings with the FRBSF.

As part of an acquisition, Bancorp assumed two subordinated debentures due to NorCal Community Bancorp Trusts I and II (the "Trusts"), established for the sole purpose of issuing trust preferred securities on September 22, 2003 and December 29, 2005, respectively. The subordinated debentures were recorded at fair values totaling $4.95 million at acquisition date with contractual values totaling $8.2 million. The difference between the contractual balance and the fair value at acquisition date is accreted into interest expense over the lives of the debentures. Accretion on the subordinated debentures totaled $63 thousand and $80 thousand in the first six months of 2018 and 2017, respectively. Bancorp has the option to defer payment of the interest on the subordinated debentures for a period of up to five years, as long as there is no default on the subordinated debentures. In the event of interest deferral, dividends to Bancorp common stockholders are prohibited. The trust preferred securities were sold and issued in private transactions pursuant to an exemption from registration under the Securities Act of 1933, as amended. Bancorp has guaranteed, on a subordinated basis, distributions and other payments due on trust preferred securities totaling $8.0 million issued by the Trusts, which have identical maturity, repricing, and payment terms as the subordinated debentures.

The following table summarizes the contractual terms of the subordinated debentures due to the Trusts as of June 30, 2018:

(in thousands)
Subordinated debentures due to NorCal Community Bancorp Trust I on October 7, 2033 with interest payable quarterly, based on 3-month LIBOR plus 3.05%, repricing quarterly (5.40% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	$	4,124
Subordinated debentures due to NorCal Community Bancorp Trust II on March 15, 2036 with interest payable quarterly, based on 3-month LIBOR plus 1.40%, repricing quarterly (3.74% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	4,124
Total	$	8,248

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Stockholders' Equity

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Stockholders' Equity

Stockholders' Equity

Dividends

The following table summarizes cash dividends paid to common shareholders, recorded as a reduction of retained earnings.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Cash dividends to common stockholders	$	2,166	$	1,660	$	4,181	$	3,315
Cash dividends per common share	$	0.31	$	0.27	$	0.60	$	0.54

On July 20, 2018, the Board of Directors declared a $0.32 per share cash dividend, payable on August 10, 2018 to shareholders of record at the close of business on August 3, 2018.

Share-Based Payments

The fair value of stock options as of the grant date is recorded as stock-based compensation expense in the consolidated statements of comprehensive income over the requisite service period, which is generally the vesting period, with a corresponding increase in common stock. Stock-based compensation also includes compensation expense related to the issuance of restricted stock awards. The fair value of the restricted stock awards on the grant date, which equals the intrinsic value, is recorded as compensation expense over the requisite service period with a corresponding increase in common stock as the shares vest. Stock option and restricted stock awards issued in 2018 include a retirement eligibility clause whereby the requisite service period is satisfied at the retirement eligibility date. For those awards, we accelerate stock-based compensation if the award holder is eligible to retire. However, retirement eligibility does not affect the legal vesting schedule of the awards.

Performance-based stock awards (restricted stock awards) are issued to a selected group of employees. Stock award vesting is contingent upon the achievement of pre-established long-term performance goals set by the Compensation Committee of the Board of Directors. Performance is measured over a three-year period and the stock awards cliff vest. These performance-based stock awards were granted at a maximum opportunity level, and based on the achievement of the pre-established goals, the actual payouts can range from 0% to 200% of the target award. For performance-based stock awards, an estimate is made of the number of shares expected to vest based on the probability that the performance criteria will be achieved to determine the amount of compensation expense to be recognized. The estimate is re-evaluated quarterly and total compensation expense is adjusted for any change in the current period.

In addition, we record excess tax benefits (deficiencies) resulting from the exercise of non-qualified stock options, the disqualifying disposition of incentive stock options and vesting of restricted stock awards as income tax benefits (expense) in the consolidated statements of comprehensive income with a corresponding decrease (increase) to current taxes payable.

The holders of unvested restricted stock awards are entitled to dividends on the same per-share ratio as holders of common stock. Tax benefits on dividends paid on unvested restricted stock awards are recorded as tax benefits in the consolidated statements of comprehensive income with a corresponding decrease to current taxes payable.

Under the 2017 Equity Plan, stock options may be net settled by a reduction in the number of shares otherwise deliverable upon exercise in satisfaction of the exercise payment and applicable tax withholding requirements. During the six months ended June 30, 2018, option holders exchanged 19,863 shares totaling $1.4 million at a weighted-average price of $70.34 for cashless stock option exercises and tax withholdings upon vesting of performance-based stock awards. During the six months ended June 30, 2017, option holders exchanged 5,651 shares totaling $385 thousand at a weighted-average price of $68.04 for cashless stock option exercises. Shares exchanged under net settlement arrangements are available for future grants under the 2017 Equity Plan.

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

We early adopted ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the first quarter of 2018 and reclassified $638 thousand from AOCI to retained earnings. This amount represents the stranded income tax effects related to the unrealized loss on available-for-sale securities in AOCI on the date of the enactment of the Tax Cuts and Jobs Act of 2017. For more information regarding ASU No. 2018-02, refer to Note 2, Accounting Standards Adopted in 2018.

Share Repurchase Program

On April 23, 2018, Bancorp announced that its Board of Directors approved a Share Repurchase Program under which Bancorp may repurchase up to $25.0 million of its outstanding common stock through May 1, 2019.

Under the Share Repurchase Program, Bancorp may purchase shares of its common stock through various means such as open market transactions, including block purchases, and privately negotiated transactions. The number of shares repurchased and the timing, manner, price and amount of any repurchases will be determined at Bancorp's discretion. Factors include, but are not limited to, stock price, trading volume and general market conditions, along with Bancorp’s general business conditions. The program may be suspended or discontinued at any time and does not obligate Bancorp to acquire any specific number of shares of its common stock.

As part of the Share Repurchase Program, Bancorp entered into a trading plan adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The 10b5-1 trading plan permits common stock to be repurchased at times that might otherwise be prohibited under insider trading laws or self-imposed trading restrictions. The 10b5-1 trading plan is administered by an independent broker and is subject to price, market volume and timing restrictions.

During the quarter ended June 30, 2018, Bancorp purchased 1,398 shares for a total amount of $104 thousand.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Financial Instruments with Off-Balance Sheet Risk

We make commitments to extend credit in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit in the form of loans or through standby letters of credit. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Because various commitments will expire without being fully drawn, the total commitment amount does not necessarily represent future cash requirements.

Our credit loss exposure is equal to the contractual amount of the commitment in the event of nonperformance by the borrower. We use the same credit underwriting criteria for all credit exposure. The amount of collateral obtained, if deemed necessary by us, is based on Management's credit evaluation of the borrower. Collateral types pledged may include accounts receivable, inventory, other personal property and real property.

The contractual amount of undrawn loan commitments and standby letters of credit not reflected in the consolidated statements of condition are as follows:

(in thousands)	June 30, 2018		December 31, 2017
Commercial lines of credit	$	222,547	$	224,370
Revolving home equity lines	186,652		177,678
Undisbursed construction loans	34,336		35,322
Personal and other lines of credit	12,408		11,758
Standby letters of credit	2,207		4,074
Total commitments and standby letters of credit	$	458,150	$	453,202

We record an allowance for losses on these off-balance sheet commitments based on an estimate of probabilities of the utilization of these commitments according to our historical experience on different types of commitments and expected loss. The allowance for losses on off-balance sheet commitments totaled $958 thousand as of June 30, 2018 and December 31, 2017, which is recorded in interest payable and other liabilities in the consolidated statements of condition.

Operating Leases

We rent certain premises under long-term, non-cancelable operating leases expiring at various dates through the year 2032. Most of the leases contain certain renewal options and escalation clauses. At June 30, 2018, the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows:

(in thousands)	2018		2019		2020		2021		2022		Thereafter		Total
Operating leases	$	2,209	$	4,198	$	3,758	$	2,138	$	1,330	$	2,904	$	16,537

Rent expense included in occupancy expense totaled $1.2 million and $1.0 million for the three months ended June 30, 2018 and 2017, respectively. Rent expense totaled $2.3 million and $2.0 million for the six months ended June 30, 2018 and 2017, respectively.

Litigation Matters

We may be party to legal actions that arise from time to time during the normal course of business.  We believe, after consultation with legal counsel, that litigation contingent liability, if any, would not have a material adverse effect on our consolidated financial position, results of operations, or cash flows.

The Bank is responsible for a proportionate share of certain litigation indemnifications provided to Visa U.S.A. ("Visa") by its member banks in connection with lawsuits related to anti-trust charges and interchange fees ("Covered Litigation"). The outcome of the Covered Litigation affects the conversion rate of Visa Class B common stock held by us to Visa Class A common stock, as discussed in Note 4, Investment Securities. The conversion rate may decrease if Visa makes more Covered Litigation settlement payments in the future, and the full effect on member banks is still uncertain. Presently, we are not aware of any significant future cash settlement payments required by the Bank on the Covered Litigation.

In 2012, Visa had reached a $4.0 billion interchange multidistrict litigation class settlement agreement for which it maintains an escrow account to be used for settlements or judgments in the Covered Litigation. Based on progress in recent settlement discussions in the U.S. interchange multi-district litigation, Visa recorded a $600 million litigation provision in the quarter ended June 30, 2018 and on June 28, Visa deposited an additional $600 million into the litigation escrow under the terms of the U.S. retrospective responsibility plan. Funding of the escrow triggers a conversion rate reduction of the Class B common stock to shares of Class A common stock. At June 30, 2018, according to Visa's Form 10-Q filed on July 27, 2018, the escrow account balance was $1.5 billion. As of the date of Visa's filing, it had reached settlement agreements with individual merchants representing 51% of the Visa-branded payment card sales volume of merchants who opted out of the 2012 settlement agreement. Litigation is ongoing and until the appeal process is complete, Visa is uncertain whether it will resolve the claims as contemplated by the settlement agreement and additional lawsuits may arise.

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Derivative Financial Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments and Hedging Activities

Derivative Financial Instruments and Hedging Activities

We have entered into interest rate swap agreements, primarily as an interest rate risk management strategy, in order to mitigate the changes in the fair value of specified long-term fixed-rate loans (or firm commitments to enter into long-term fixed-rate loans) caused by changes in interest rates. These hedges allow us to offer long-term fixed-rate loans to customers without assuming the interest rate risk of a long-term asset. Converting our fixed-rate interest payments to floating-rate interest payments, generally benchmarked to the one-month U.S. dollar LIBOR index, protects us against changes in the fair value of our loans associated with fluctuating interest rates.

Our credit exposure, if any, on interest rate swap asset positions is limited to the fair value (net of any collateral pledged to us) and interest payments of all swaps by each counterparty. Conversely, when an interest rate swap is in a liability position exceeding a certain threshold, we may be required to post collateral to the counterparty in an amount determined by the agreements. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values.

As of June 30, 2018, we had five interest rate swap agreements, which are scheduled to mature in June 2031, October 2031, July 2032, August 2037 and October 2037. All of our derivatives are designated hedging instruments and are accounted for as fair value hedges. The notional amounts of the interest rate contracts are equal to the notional amounts of the hedged loans. Our interest rate swap payments are settled monthly with counterparties. Accrued interest on the swaps totaled $5 thousand and $8 thousand as of June 30, 2018 and December 31, 2017, respectively.

The following tables presents the notional amount and fair value of our derivatives designated as hedging instruments:

	Derivative Assets				Derivative Liabilities
(in thousands)	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Fair value hedges:
Interest rate contracts notional amount	$	9,081	$	4,019	$	9,293	$	14,810
Interest rate contracts fair value1	$	327	$	74	$	276	$	740

¹ See Note 3,Fair Value of Assets and Liabilities, for valuation methodology.

The table below presents the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of hedged assets as of June 30, 2018:

(in thousands)	Carrying Amounts of Hedged Assets		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans
Loans	$	18,112	$	(262	)

The table below presents the net gains (losses) recognized in interest income on loans on the consolidated statements of comprehensive income related to our derivatives designated as fair value hedges:

	Three months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	187		$	(129	)
Payment on interest rate swaps	$	(40	)	$	(87	)
(Decrease) increase in value of hedged loans	$	(116	)	$	191
Decrease in value of yield maintenance agreement	$	(3	)	$	(4	)
Net gain (loss) on fair value hedging relationships recognized in interest income	$	28		$	(29	)
	Six months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	716		$	(18	)
Payment on interest rate swaps	$	(95	)	$	(185	)
(Decrease) increase in value of hedged loans	$	(693	)	$	78
Decrease in value of yield maintenance agreement	$	(7	)	$	(7	)
Net loss on fair value hedging relationships recognized against interest income	$	(79	)	$	(132	)

Our derivative transactions with counterparties are under International Swaps and Derivative Association (“ISDA”) master agreements that include “right of set-off” provisions. “Right of set-off” provisions are legally enforceable rights to offset recognized amounts and there may be an intention to settle such amounts on a net basis. We do not offset such financial instruments for financial reporting purposes.

The following table shows information on financial instruments that are eligible for offset in the consolidated statements of condition.

Offsetting of Financial Assets and Derivative Assets
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Assets Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Assets1		Condition		of Condition1		Instruments			Received		Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	327	$	—	$	327	$	(276	)	$	—	$	51
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	74	$	—	$	74	$	(74	)	$	—	$	—

¹ Amounts exclude accrued interest totaling less than $1 thousand at both June 30, 2018 and December 31, 2017.

Offsetting of Financial Liabilities and Derivative Liabilities
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Liabilities Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Liabilities2		Condition		of Condition2		Instruments			Pledged			Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	276	$	—	$	276	$	(276	)				$	—
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	740	$	—	$	740	$	(74	)	$	(666	)	$	—

² Amounts exclude accrued interest totaling $4 thousand and $8 thousand at June 30, 2018 and December 31, 2017, respectively.

For more information on how we account for our interest rate swaps, refer to Note 1 to the Consolidated Financial Statements included in our 2017 Form 10-K filed with the SEC on March 14, 2018.

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Acquisition

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Acquisition

Acquisition

On November 21, 2017, we completed the merger of Bank of Napa, N.A. (OTCQB: BNNP), to enhance our market presence in Napa, California. Bank of Napa was a national bank with two branch offices serving Napa. The acquisition added $134.7 million in loans, $249.9 million in deposits and $75.5 million in investment securities to Bank of Marin as of the acquisition date. Bank of Napa shareholders received 0.307 shares of Bancorp common stock for each share of Bank of Napa common stock outstanding. We have accounted for the acquisition of Bank of Napa as a business combination under the acquisition method of accounting. The assets acquired and liabilities assumed, both tangible and intangible, were recorded at their fair values as of the acquisition date in accordance with ASC 805, Business Combinations. The acquisition was treated as a "reorganization" within the definition of section 368(a) of the Internal Revenue Code and is generally considered tax-free for U.S. federal income tax purposes.

The Bank of Napa acquisition resulted in $23.7 million in goodwill, which represents the excess of the total purchase price paid over the fair value of the assets acquired, net of the fair values of liabilities assumed. Goodwill mainly reflects expected value created through the combined operations of Bank of Napa and Bank of Marin, which we evaluate for impairment annually. We determined that the fair value of our traditional community banking activities (provided through our branch network) exceeded the carrying amount of the bank-level reporting unit. The goodwill is not deductible for tax purposes.

The core deposit intangible represents the estimated future benefits of acquired deposits and is booked separately from the related deposits. We recorded a core deposit intangible asset of $4.4 million from the Bank of Napa acquisition on November 21, 2017, of which $56 thousand was amortized in 2017 and $254 thousand was amortized in the first six months of 2018. The core deposit intangible is amortized on an accelerated basis over an estimated ten-year life, and is evaluated periodically for impairment. No impairment loss was recognized as of June 30, 2018.

Acquisition-related expenses are recognized as incurred and continue until all systems have been converted and operational functions become fully integrated. Bank of Marin Bancorp incurred acquisition-related expenses in the consolidated statements of comprehensive income for the three and six months ended June 30, 2018 as follows:

(in thousands)	Three months ended June 30, 2018		Six months ended June 30, 2018
Data processing1	$	163	$	555
Professional services	31		126
Personnel severance	35		141
Other	21		43
Total	$	250	$	865
1 Primarily relates to Bank of Napa's core processing system contract termination and deconversion fees.

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

The consolidated financial statements include the accounts of Bank of Marin Bancorp (“Bancorp”), a bank holding company, and its wholly-owned bank subsidiary, Bank of Marin (the “Bank”), a California state-chartered commercial bank. References to “we,” “our,” “us” mean Bancorp and the Bank that are consolidated for financial reporting purposes. The accompanying unaudited consolidated interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted pursuant to those rules and regulations. Although we believe that the disclosures are adequate and the information presented is not misleading, we suggest that these interim financial statements be read in conjunction with the annual financial statements and the notes thereto included in our 2017 Annual Report on Form 10-K.  In the opinion of Management, the unaudited consolidated financial statements reflect all adjustments, which are necessary for a fair presentation of the consolidated financial position, the results of operations, changes in comprehensive income, changes in stockholders’ equity, and cash flows for the periods presented. All material intercompany transactions have been eliminated. The results of these interim periods may not be indicative of the results for the full year or for any other period.

The NorCal Community Bancorp Trusts I and II, respectively (the "Trusts") were formed for the sole purpose of issuing trust preferred securities. Bancorp is not considered the primary beneficiary of the Trusts (variable interest entities), therefore the Trusts are not consolidated in our consolidated financial statements, but rather the subordinated debentures are shown as a liability on our consolidated statements of condition (See Note 6, Borrowings). Bancorp accounts for its investment in the securities of the Trusts under the equity method, which is included in interest receivable and other assets in the consolidated statements of condition.

Earnings Per Share

Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities.

Recently Adopted and Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606). The core principle of this ASU (and all subsequent updates) is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. This ASU establishes a five-step model that must be used to recognize revenue that requires the entity to identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the entity satisfies the performance obligation. The ASU does not apply to the majority of our revenue, including revenue associated with financial instruments, such as loans and investment securities, and certain non-interest income, such as earnings on bank-owned life insurance, dividends on Federal Home Loan Bank ("FHLB") stock, gains or losses on sales of investment securities, and deposit overdraft charges. The standard allowed the use of either the full retrospective or modified retrospective transition method. We elected to apply the modified retrospective transition method to incomplete contracts as of the initial date of application on January 1, 2018. The adoption of the new standards did not have a material impact on our financial condition or results of operations as revenue recognition under the new standards did not change significantly from our current practice of recognizing the in-scope non-interest income. In addition, we did not retroactively revise prior period amounts or record a cumulative adjustment to retained earnings upon adoption. We considered the nature, amount, timing, and uncertainty of revenue from contracts with customers and determined that significant revenue streams are sufficiently disaggregated in the consolidated statements of comprehensive income.

Descriptions of our significant revenue-generating transactions that are within the scope of the new revenue recognition standards, which are presented in the consolidated statements of comprehensive income as components of non-interest income, are as follows:

• Wealth Management & Trust ("WM&T") fees - WM&T services include, but are not limited to: customized investment advisory and management; administrative services such as bill pay and tax reporting; trust administration, estate settlement, custody and fiduciary services. Performance obligations for investment advisory and management services are generally satisfied over time. Revenue is recognized monthly according to a tiered fee schedule based on the client's month-end market value of assets under our management. WM&T does not earn revenue based on performance or incentives. Costs associated with WM&T revenue-generating activities, such as payments to sub-advisors, are recorded separately as part of professional service expenses when incurred.

• Deposit account service charges - Service charges on deposit accounts consist of monthly maintenance fees, business account analysis fees, business online banking fees, check order charges, and other deposit account-related fees. Performance obligations for monthly maintenance fees and account analysis fees are satisfied, and the related revenue recognized, when we complete our performance obligation each month. Performance obligations related to transaction-based services (such as check orders) are satisfied, and the related revenue recognized, at a point in time when completed, except for business accounts subject to analysis where the transaction-based fees are part of the monthly account analysis fees.

• Debit card interchange fees - We issue debit cards to our consumer and small business customers that allow them to purchase goods and services from merchants in person, online, or via mobile devices using funds held in their demand deposit accounts held with us. Debit cards issued to our customers are part of global electronic payment networks (such as Visa) who pass a portion of the merchant interchange fees to debit card-issuing member banks like us when our customers make purchases through their networks. Performance obligations for debit card services are satisfied and revenue is recognized daily as the payment networks process transactions. Because we act in an agent capacity, we determined that network costs previously recorded as a component of non-interest expense should be netted with interchange fees recorded in non-interest income. Network costs were immaterial for the six months ended June 30, 2018 and 2017.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this ASU make improvements to accounting standards related to financial instruments, including the following:

• Requires equity investments, except for those accounted for under the equity method of accounting or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

• Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When impairment exists, an entity is required to measure the investment at fair value.

• Eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value required under current standards for financial instruments measured at amortized cost on the consolidated balance sheet.

• Requires public companies to use the exit price notion when measuring and disclosing the fair value of financial instruments.

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements.

• Clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets.

We adopted the requirements of this ASU effective January 1, 2018, which did not have a material impact on our financial condition and results of operations. The fair value of our loans held for investment, which is recorded at amortized cost, now incorporates the exit price notion reflecting factors such as a liquidity premium. See Note 3, Fair Value of Assets and Liabilities.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on how to present and classify eight specific cash flow topics in the statement of cash flows. The ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The amendments should be applied using a retrospective transition method to each period presented, if practical. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures for the periods presented.

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The amendments are intended to help companies evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses and provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments should be applied prospectively and are effective for annual periods after December 31, 2017, including interim periods within those periods. We adopted the amendments effective January 1, 2018, which did not impact our financial condition, results of operations, or related financial statement disclosures in the first quarter of 2018.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. This ASU applies to entities that change the terms or conditions of a share-based payment award. The FASB adopted this ASU to provide clarity in what constitutes a modification and to reduce diversity in practice in applying Topic 718. In order for a change to a share-based arrangement to not require Topic 718 modification accounting treatment, all of the following must be met: no change in fair value, no change in vesting conditions and no change in the balance sheet classification of the modified award. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted, including adoption in an interim period. The amendments should be applied prospectively to an award modified on or after the adoption date. We adopted the requirements of this ASU effective January 1, 2018, which did not impact our financial condition, results of operation, or related financial statement disclosures.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This amendment changes both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. It is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting and increase transparency as to the scope and results of hedging programs. The ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. We early-adopted the amendments of this ASU in the second quarter of 2018, and elected to perform hedge effectiveness assessments using a qualitative approach instead of quantitative regression analysis going forward. The adoption of this ASU had an immaterial impact to our financial results. The amendments also require additional disclosures, which are included in Note 9, Derivative Financial Instruments and Hedging Activities.

In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This amendment helps organizations address certain stranded income tax effects in accumulated other comprehensive income (AOCI) resulting from the enactment of the Tax Cuts and Jobs Act of 2017. The ASU requires financial statement preparers to disclose a description of the accounting policy for releasing income tax effects from AOCI, whether or not they elect to reclassify the stranded income tax effects from the Tax Cuts and Jobs Act of 2017, and information about the other income tax effects that are reclassified. The amendments are effective for all organizations for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The amendments in this ASU should be applied in either the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. We early adopted this ASU in the first quarter of 2018. See Note 7, Stockholders' Equity.

Accounting Standards Not Yet Effective

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The amendments in this ASU intend to increase transparency and comparability among organizations by recognizing an asset, which represents the right to use the asset for the lease term, and a lease liability, which is a lessee's obligation to make lease payments measured on a discounted basis. This ASU generally applies to leasing arrangements exceeding a twelve-month term. ASU 2016-02 is effective for annual periods, including interim periods within those annual periods beginning after December 15, 2018 and requires a modified retrospective method of adoption. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which provides various corrections and clarifications to ASU 2016-02. Early application of the amendments is permitted. We intend to adopt this ASU during the first quarter of 2019, as required. We completed an inventory of our lease agreements and continue to evaluate potential accounting software solutions that will aid in the transition to the new leasing guidance. As of June 30, 2018, our undiscounted operating lease obligations that were off-balance sheet totaled $16.5 million (See Note 8, Commitments and Contingencies). Upon adoption of this ASU, the present values of leases currently classified as operating leases will be recognized as lease assets and liabilities on our consolidated balance sheets. Additional disclosures of key information about our leasing arrangements will also be required. We do not expect that the ASU will have a material impact on our capital ratios or return on average assets when adopted and we are currently evaluating the effect that the ASU will have on other components of our financial condition and results of operations.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Under the new guidance, entities will be required to present financial assets at the net amount expected to be collected. The measurement of expected credit losses will be based on historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of a credit over its remaining life. In addition, the ASU amends the accounting for expected credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have formed an internal Current Expected Credit Loss ("CECL") committee and are working with our third party vendor to determine the appropriate methodologies and resources to utilize in preparation for transition to the new accounting standards. The impact of this ASU on our financial condition and results of operations is not known at this time.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. This update simplifies the accounting for share-based payment transactions for acquiring goods and services from nonemployees, applying some of the same requirements as employee share-based payment transactions. The ASU will not affect the accounting for share-based payment awards to nonemployee directors, which will continue to be treated as employee share-based transactions under the current standards. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We do not expect that the ASU will have a material impact on our financial condition or results of operations, as it is not our practice to issue stock-based awards to pay for goods and services from nonemployees, other than nonemployee directors.

Fair Value Hierarchy and Fair Value Measurement

We group our assets and liabilities that are measured at fair value in three levels within the fair value hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

Level 1: Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2: Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuations for which all significant assumptions are observable or can be corroborated by observable market data.

Level 3: Valuations are based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Values are determined using pricing models and discounted cash flow models and may include significant Management judgment and estimation.

Transfers between levels of the fair value hierarchy are recognized through our monthly and/or quarterly valuation process in the reporting period during which the event or circumstances that caused the transfer occurred.

Finance, Loan and Lease Receivables, Held-for-investment, Allowance and Nonperforming Loans

We generally make commercial loans to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and acquisitions.  Management examines historical, current, and projected cash flows to determine the ability of the borrower to repay obligations as agreed. Commercial loans are made based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral and guarantor support. The cash flows of borrowers, however, may not occur as expected, and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed, such as accounts receivable and inventory, and typically include personal guarantees. We target stable businesses with guarantors who provide additional sources of repayment and have proven to be resilient in periods of economic stress.

Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans discussed above. We underwrite these loans to be repaid from cash flow and to be supported by real property collateral. Underwriting standards for commercial real estate loans include, but are not limited to, debt coverage and loan-to-value ratios. Furthermore, the owners of the properties guarantee substantially all of our commercial real estate loans.  Conditions in the real estate markets or in the general economy may adversely affect our commercial real estate loans. In the event of a vacancy, we expect guarantors to carry the loans until they find a replacement tenant.  The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio.

We generally make construction loans to developers and builders to finance construction, renovation and occasionally land acquisitions in anticipation of near-term development. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. Significant events can affect the construction industry, including: the inherent volatility of real estate markets and vulnerability to delays due to weather, change orders, inability to obtain construction permits, labor or material shortages, and price changes. Estimates of construction costs and value associated with the completed project may be inaccurate. Repayment of construction loans is largely dependent on the ultimate success of the project.

Consumer loans primarily consist of home equity lines of credit, other residential loans and floating homes, along with a small number of installment loans. Our other residential loans include tenancy-in-common fractional interest loans ("TIC") located almost entirely in San Francisco County. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification among consumer loan types, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk.

We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and in the loan portfolio. Our definitions of “Special Mention” risk graded loans, or worse, are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC").  Our internally assigned grades are as follows:

Pass and Watch: Loans to borrowers of acceptable or better credit quality. Borrowers in this category demonstrate fundamentally sound financial positions, repayment capacity, credit history, and management expertise.  Loans in this category must have an identifiable and stable source of repayment and meet the Bank’s policy regarding debt-service-coverage ratios.  These borrowers are capable of sustaining normal economic, market or operational setbacks without significant financial consequences.  Negative external industry factors are generally not present.  The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period.

Special Mention: Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification.

Substandard: Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies.

Doubtful: Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on non-accrual status and usually are collateral-dependent.

We regularly review our credits for accuracy of risk grades whenever we receive new information. Borrowers are generally required to submit financial information at regular intervals. Typically, commercial borrowers with lines of credit are required to submit financial information with reporting intervals ranging from monthly to annually depending on credit size, risk and complexity. In addition, investor commercial real estate borrowers are usually required to submit rent rolls or property income statements annually. We monitor construction loans monthly and review them on an ongoing basis. We review home equity and other consumer loans based on delinquency status. We also review loans graded “Watch” or worse, regardless of loan type, no less than quarterly.

Troubled Debt Restructuring

Our loan portfolio includes certain loans modified in a troubled debt restructuring (“TDR”), where we have granted economic concessions to borrowers experiencing financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. TDRs on non-accrual status at the time of restructure may be returned to accruing status after Management considers the borrower’s sustained repayment performance for a reasonable period, generally six months, and obtains reasonable assurance of repayment and performance.

We may remove a loan from TDR designation if it meets all of the following conditions:

• The loan is subsequently refinanced or restructured at current market interest rates and the new terms are consistent with the treatment of creditworthy borrowers under regular underwriting standards;

• The borrower is no longer considered to be in financial difficulty;

• Performance on the loan is reasonably assured; and;

• Existing loan did not have any forgiveness of principal or interest.

The same Management level that approved the upgrading of the loan classification must approve the removal of TDR status.

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Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Earnings Per Share Reconciliation

The following table shows: 1) weighted average basic shares, 2) potentially dilutive weighted average common shares related to stock options and unvested restricted stock awards, and 3) weighted average diluted shares. Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Weighted average basic shares outstanding	6,944		6,110		6,929		6,101
Potentially dilutive common shares related to:
Stock options	74		52		74		57
Unvested restricted stock awards	15		12		16		15
Weighted average diluted shares outstanding	7,033		6,174		7,019		6,173
Net income	$	7,891	$	5,186	$	14,280	$	9,734
Basic EPS	$	1.14	$	0.85	$	2.06	$	1.60
Diluted EPS	$	1.12	$	0.84	$	2.03	$	1.58
Weighted average anti-dilutive shares not included in the calculation of diluted EPS	30		33		35		23

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Fair Value of Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table summarizes our assets and liabilities that were required to be recorded at fair value on a recurring basis.

(in thousands)   Description of Financial Instruments	Carrying Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)		Measurement Categories: Changes in Fair Value Recorded In1
June 30, 2018
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	240,794	$	—	$	240,794	$	—	OCI
SBA-backed securities	23,954		—		23,954		—		OCI
Debentures of government sponsored agencies	32,139		—		32,139		—		OCI
Privately-issued collateralized mortgage obligations	435		—		435		—		OCI
Obligations of state and political subdivisions	87,788		—		87,788		—		OCI
Corporate bonds	3,027		—		3,027		—		OCI
Derivative financial assets (interest rate contracts)	327		—		327		—		NI
Derivative financial liabilities (interest rate contracts)	276		—		276		—		NI
December 31, 2017
Securities available-for-sale:
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies	$	188,061	$	—	$	188,061	$	—	OCI
SBA-backed securities	25,982		—		25,817		165		OCI
Debentures of government sponsored agencies	12,938		—		12,938		—		OCI
Privately-issued collateralized mortgage obligations	1,431		—		1,431		—		OCI
Obligations of state and political subdivisions	97,491		—		97,491		—		OCI
Corporate bonds	6,564		—		6,564		—		OCI
Derivative financial assets (interest rate contracts)	74		—		74		—		NI
Derivative financial liabilities (interest rate contracts)	740		—		740		—		NI

 ¹ Other comprehensive income ("OCI") or net income ("NI").

Schedule of Fair Value by Balance Sheet Grouping

The following table summarizes fair value estimates for financial instruments as of June 30, 2018 and December 31, 2017, excluding financial instruments recorded at fair value on a recurring basis (summarized in the first table in this note). The carrying amounts in the following table are recorded in the consolidated statements of condition under the indicated captions. Further, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements such as bank-owned life insurance policies ("BOLI") and non-maturity deposit liabilities. Additionally, we hold shares of FHLB stock and Visa Inc. Class B common stock at cost. These shares are restricted from resale, except among member banks, and their values are discussed in Note 4, Investment Securities.

	June 30, 2018					December 31, 2017
(in thousands)	Carrying Amounts		Fair Value		Fair Value Hierarchy	Carrying Amounts		Fair Value		Fair Value Hierarchy
Financial assets (recorded at amortized cost)
Cash and cash equivalents	$	83,855	$	83,855	Level 1	$	203,545	$	203,545	Level 1
Investment securities held-to-maturity	170,652		166,127		Level 2	151,032		151,032		Level 2
Loans, net	1,701,798		1,666,409		Level 3	1,663,246		1,650,198		Level 3
Interest receivable	7,814		7,814		Level 2	7,501		7,501		Level 2
Financial liabilities (recorded at amortized cost)
Time deposits	137,040		136,023		Level 2	160,116		159,540		Level 2
Subordinated debentures	5,802		6,988		Level 3	5,739		5,118		Level 3
Interest payable	167		167		Level 2	191		191		Level 2

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Investment Securities (Tables)

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities Portfolio

Our investment securities portfolio consists of obligations of state and political subdivisions, corporate bonds, U.S. government agency securities, including residential and commercial mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Small Business Administration ("SBA"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, and privately issued CMOs, as reflected in the following table.

	June 30, 2018									December 31, 2017
	Amortized		Fair		Gross Unrealized					Amortized		Fair		Gross Unrealized
(in thousands)	Cost		Value		Gains		(Losses)			Cost		Value		Gains		(Losses)
Held-to-maturity:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	$	94,203	$	90,824	$	—	$	(3,379	)	$	100,376	$	100,096	$	234	$	(514	)
SBA-backed securities	8,882		8,743		—		(139		)	—		—		—		—
CMOs issued by FNMA	11,881		11,766		—		(115		)	—		—		—		—
CMOs issued by FHLMC	34,668		33,591		—		(1,077		)	31,010		30,938		2		(74		)
CMOs issued by GNMA	3,730		3,713		—		(17		)	—		—		—		—
Obligations of state and political subdivisions	17,288		17,490		235		(33		)	19,646		19,998		383		(31		)
Total held-to-maturity	170,652		166,127		235		(4,760		)	151,032		151,032		619		(619		)
Available-for-sale:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	90,082		87,590		17		(2,509		)	65,559		65,262		126		(423		)
SBA-backed securities	24,620		23,954		—		(666		)	25,979		25,982		58		(55		)
CMOs issued by FNMA	21,026		20,571		7		(462		)	35,340		35,125		33		(248		)
CMOs issued by FHLMC	123,359		120,411		1		(2,949		)	70,514		69,889		3		(628		)
CMOs issued by GNMA	12,641		12,222		2		(421		)	17,953		17,785		26		(194		)
Debentures of government- sponsored agencies	32,395		32,139		—		(256		)	12,940		12,938		3		(5		)
Privately issued CMOs	431		435		4		—			1,432		1,431		1		(2		)
Obligations of state and political subdivisions	89,699		87,788		77		(1,988		)	98,027		97,491		298		(834		)
Corporate bonds	3,015		3,027		24		(12		)	6,541		6,564		26		(3		)
Total available-for-sale	397,268		388,137		132		(9,263		)	334,285		332,467		574		(2,392		)
Total investment securities	$	567,920	$	554,264	$	367	$	(14,023	)	$	485,317	$	483,499	$	1,193	$	(3,011	)

Sales of investment securities and gross gains and losses

Sales of investment securities and gross gains and losses are shown in the following table.

	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Available-for-sale:
Sales proceeds	$	5,006		$	1,321		$	5,006		$	1,321
Gross realized gains	27			13			27			13
Gross realized losses	(16		)	(3		)	(16		)	(3		)

Our investment securities portfolio consists of obligations of state and political subdivisions, corporate bonds, U.S. government agency securities, including residential and commercial mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Small Business Administration ("SBA"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, and privately issued CMOs, as reflected in the following table.

	June 30, 2018									December 31, 2017
	Amortized		Fair		Gross Unrealized					Amortized		Fair		Gross Unrealized
(in thousands)	Cost		Value		Gains		(Losses)			Cost		Value		Gains		(Losses)
Held-to-maturity:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	$	94,203	$	90,824	$	—	$	(3,379	)	$	100,376	$	100,096	$	234	$	(514	)
SBA-backed securities	8,882		8,743		—		(139		)	—		—		—		—
CMOs issued by FNMA	11,881		11,766		—		(115		)	—		—		—		—
CMOs issued by FHLMC	34,668		33,591		—		(1,077		)	31,010		30,938		2		(74		)
CMOs issued by GNMA	3,730		3,713		—		(17		)	—		—		—		—
Obligations of state and political subdivisions	17,288		17,490		235		(33		)	19,646		19,998		383		(31		)
Total held-to-maturity	170,652		166,127		235		(4,760		)	151,032		151,032		619		(619		)
Available-for-sale:
Securities of U.S. government agencies:
MBS pass-through securities issued by FHLMC and FNMA	90,082		87,590		17		(2,509		)	65,559		65,262		126		(423		)
SBA-backed securities	24,620		23,954		—		(666		)	25,979		25,982		58		(55		)
CMOs issued by FNMA	21,026		20,571		7		(462		)	35,340		35,125		33		(248		)
CMOs issued by FHLMC	123,359		120,411		1		(2,949		)	70,514		69,889		3		(628		)
CMOs issued by GNMA	12,641		12,222		2		(421		)	17,953		17,785		26		(194		)
Debentures of government- sponsored agencies	32,395		32,139		—		(256		)	12,940		12,938		3		(5		)
Privately issued CMOs	431		435		4		—			1,432		1,431		1		(2		)
Obligations of state and political subdivisions	89,699		87,788		77		(1,988		)	98,027		97,491		298		(834		)
Corporate bonds	3,015		3,027		24		(12		)	6,541		6,564		26		(3		)
Total available-for-sale	397,268		388,137		132		(9,263		)	334,285		332,467		574		(2,392		)
Total investment securities	$	567,920	$	554,264	$	367	$	(14,023	)	$	485,317	$	483,499	$	1,193	$	(3,011	)

Investments Classified by Contractual Maturity Date

The amortized cost andfair value of investment debt securities by contractual maturity at June 30, 2018 and December 31, 2017 are shown in the following table. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties.

	June 30, 2018								December 31, 2017
	Held-to-Maturity				Available-for-Sale				Held-to-Maturity				Available-for-Sale
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Within one year	$	2,859	$	2,882	$	8,272	$	8,263	$	2,151	$	2,172	$	10,268	$	10,272
After one but within five years	13,063		13,147		79,662		78,514		15,577		15,791		71,576		71,237
After five years through ten years	63,321		61,350		216,584		210,650		54,641		54,554		129,723		128,954
After ten years	91,409		88,748		92,750		90,710		78,663		78,515		122,718		122,004
Total	$	170,652	$	166,127	$	397,268	$	388,137	$	151,032	$	151,032	$	334,285	$	332,467

Schedule of Financial Instruments Owned and Pledged as Collateral

Pledged investment securities are shown in the following table.

(in thousands)	June 30, 2018		December 31, 2017
Pledged to the State of California:
Secure public deposits in compliance with the Local Agency Security Program	$	103,097	$	107,829
Collateral for trust deposits	749		761
Total investment securities pledged to the State of California	$	103,846	$	108,590
Collateral for Wealth Management and Trust Services checking account	$	2,014	$	2,026

Schedule of Unrealized Loss on Investments

There were 266 and 198investment securities in unrealized loss positions at June 30, 2018 and December 31, 2017, respectively. Those securities are summarized and classified according to the duration of the loss period in the following tables:

June 30, 2018	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
MBS pass-through securities issued by FHLMC and FNMA	$	22,100	$	(830	)	$	68,724	$	(2,549	)	$	90,824	$	(3,379	)
SBA-backed securities	8,742		(139		)	—		—			$	8,742	$	(139	)
CMOs issued by FNMA	11,766		(115		)	—		—			11,766		(115		)
CMOs issued by FHLMC	19,798		(564		)	13,793		(513		)	33,591		(1,077		)
CMOs issued by GNMA	—		—			3,713		(17		)	3,713		(17		)
Obligations of state and political subdivisions	3,816		(33		)	—		—			3,816		(33		)
Total held-to-maturity	66,222		(1,681		)	86,230		(3,079		)	152,452		(4,760		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	68,906		(1,843		)	17,713		(666		)	86,619		(2,509		)
SBA-backed securities	23,954		(666		)	—		—			23,954		(666		)
CMOs issued by FNMA	15,687		(321		)	4,642		(141		)	20,329		(462		)
CMOs issued by FHLMC	115,370		(2,949		)	—		—			115,370		(2,949		)
CMOs issued by GNMA	11,297		(419		)	603		(2		)	11,900		(421		)
Debentures of government- sponsored agencies	32,139		(256		)	—		—			32,139		(256		)
Privately issued CMOs	—		—			—		—			—		—
Obligations of state and political subdivisions	57,217		(835		)	18,832		(1,153		)	76,049		(1,988		)
Corporate bonds	1,522		(12		)	—		—			1,522		(12		)
Total available-for-sale	326,092		(7,301		)	41,790		(1,962		)	367,882		(9,263		)
Total temporarily impaired securities	$	392,314	$	(8,982	)	$	128,020	$	(5,041	)	$	520,334	$	(14,023	)

December 31, 2017	< 12 continuous months					≥ 12 continuous months					Total securities  in a loss position
(in thousands)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Held-to-maturity:
Obligations of state and political subdivisions	$	3,648	$	(31	)	$	—	$	—		$	3,648	$	(31	)
MBS pass-through securities issued by FHLMC and FNMA	16,337		(143		)	46,845		(371		)	63,182		(514		)
CMOs issued by FHLMC	11,066		(31		)	13,824		(43		)	24,890		(74		)
Total held-to-maturity	31,051		(205		)	60,669		(414		)	91,720		(619		)
Available-for-sale:
MBS pass-through securities issued by FHLMC and FNMA	32,189		(121		)	15,325		(302		)	47,514		(423		)
SBA-backed securities	11,028		(53		)	165		(2		)	11,193		(55		)
CMOs issued by FNMA	26,401		(171		)	5,440		(77		)	31,841		(248		)
CMOs issued by FHLMC	69,276		(628		)	—		—			69,276		(628		)
CMOs issued by GNMA	14,230		(194		)	—		—			14,230		(194		)
Debentures of government- sponsored agencies	2,984		(5		)	—		—			2,984		(5		)
Privately issued CMO's	1,310		(2		)	—		—			1,310		(2		)
Obligations of state and political subdivisions	52,197		(288		)	19,548		(546		)	71,745		(834		)
Corporate bonds	3,060		(3		)	—		—			3,060		(3		)
Total available-for-sale	212,675		(1,465		)	40,478		(927		)	253,153		(2,392		)
Total temporarily impaired securities	$	243,726	$	(1,670	)	$	101,147	$	(1,341	)	$	344,873	$	(3,011	)

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Loans and Allowance for Loan Losses (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Past Due Financing Receivables

The following table shows outstanding loans by class and payment aging as of June 30, 2018 and December 31, 2017.

Loan Aging Analysis by Loan Class
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential 1		Installment and other consumer		Total
June 30, 2018
30-59 days past due	$	—	$	—	$	—	$	—	$	77	$	—	$	11	$	88
60-89 days past due	—		—		—		—		—		—		—		—
90 days or more past due	—		—		—		—		—		—		—		—
Total past due	—		—		—		—		77		—		11		88
Current	241,994		317,587		839,667		57,015		125,954		108,829		26,477		1,717,523
Total loans 3	$	241,994	$	317,587	$	839,667	$	57,015	$	126,031	$	108,829	$	26,488	$	1,717,611
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	385	$	—	$	—	$	385
December 31, 2017
30-59 days past due	$	—	$	—	$	—	$	—	$	99	$	255	$	330	$	684
60-89 days past due	1,340		—		—		—		—		—		—		1,340
90 days or more past due	—		—		—		—		307		—		—		307
Total past due	1,340		—		—		—		406		255		330		2,331
Current	234,495		300,963		822,984		63,828		132,061		95,271		27,080		1,676,682
Total loans 3	$	235,835	$	300,963	$	822,984	$	63,828	$	132,467	$	95,526	$	27,410	$	1,679,013
Non-accrual loans 2	$	—	$	—	$	—	$	—	$	406	$	—	$	—	$	406

¹ Our residential loan portfolio does not include sub-prime loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages", the characteristics of which are loans lacking full documentation, borrowers having low FICO scores or higher loan-to-value ratios.

²One purchased credit impaired ("PCI") loan with an unpaid balance of $6 thousand and no carrying value was not accreting interest at June 30, 2018. Three PCI loans with unpaid balances totaling $131 thousand and no carrying values were not accreting interest at December 31, 2017. Amounts exclude accreting PCI loans totaling $2.1 million at both June 30, 2018 and December 31, 2017 as we have a reasonable expectation about future cash flows to be collected and we continue to recognize accretable yield on these loans in interest income. There were no accruing loans past due more than ninety days at June 30, 2018 or December 31, 2017.

³ Amounts include net deferred loan origination costs of $800 thousand and $818 thousand at June 30, 2018 and December 31, 2017, respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $956 thousand and $1.2 million at June 30, 2018 and December 31, 2017, respectively.

Financing Receivable Credit Quality Indicators

The following table represents an analysis of the carrying amount in loans, net of deferred fees and costs and purchase premiums or discounts, by internally assigned risk grades, including PCI loans, at June 30, 2018 and December 31, 2017.

Credit Risk Profile by Internally Assigned Risk Grade
(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Purchased credit-impaired		Total
June 30, 2018
Pass	$	224,707	$	299,469	$	836,634	$	54,324	$	124,103	$	108,829	$	26,389	$	2,140	$	1,676,595
Special Mention	14,842		8,904		2,232		—		1,121		—		—		—		27,099
Substandard	2,403		8,005		—		2,691		719		—		99		—		13,917
Total loans	$	241,952	$	316,378	$	838,866	$	57,015	$	125,943	$	108,829	$	26,488	$	2,140	$	1,717,611
December 31, 2017
Pass	$	214,636	$	281,104	$	818,570	$	60,859	$	130,558	$	95,526	$	27,287	$	1,325	$	1,629,865
Special Mention	9,318		9,284		1,850		—		—		—		—		790		21,242
Substandard	11,816		9,409		1,774		2,969		1,815		—		123		—		27,906
Total loans	$	235,770	$	299,797	$	822,194	$	63,828	$	132,373	$	95,526	$	27,410	$	2,115	$	1,679,013

Troubled Debt Restructurings on Financing Receivables

The following table summarizes the carrying amount of TDR loans by loan class as of June 30, 2018 and December 31, 2017.

(in thousands)
Recorded investment in Troubled Debt Restructurings 1	June 30, 2018		December 31, 2017
Commercial and industrial	$	1,917	$	2,165
Commercial real estate, owner-occupied	7,002		6,999
Commercial real estate, investor	1,844		2,171
Construction	2,691		2,969
Home equity	348		347
Other residential	988		1,148
Installment and other consumer	704		721
Total	$	15,494	$	16,520

¹ There were no TDR loans on non-accrual status at June 30, 2018 and December 31, 2017.

The following table presents information for loans modified in a TDR during the presented periods, including the number of modified contracts, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented.

(dollars in thousands)	Number of Contracts Modified	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment at Period End
TDRs during the three months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the three months ended June 30, 2017:
None	—	$	—	$	—	$	—

TDRs during the six months ended June 30, 2018:
Commercial and industrial	2	$	254	$	245	$	235
TDRs during the six months ended June 30, 2017:
Installment and consumer	1	$	50	$	50	$	49

Impaired Financing Receivables

The following tables summarize information by class on impaired loans and their related allowances. Total impaired loans include non-accrual loans, accruing TDR loans and accreting PCI loans that have experienced post-acquisition declines in cash flows expected to be collected.

(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
June 30, 2018
Recorded investment in impaired loans:
With no specific allowance recorded	$	306	$	—	$	—	$	2,691	$	385	$	989	$	46	$	4,417
With a specific allowance recorded	1,611		7,002		1,844		—		347		—		658		11,462
Total recorded investment in impaired loans	$	1,917	$	7,002	$	1,844	$	2,691	$	732	$	989	$	704	$	15,879
Unpaid principal balance of impaired loans	$	1,905	$	6,993	$	1,837	$	2,688	$	729	$	987	$	703	$	15,842
Specific allowance	232		126		47		—		6		—		92		503
Average recorded investment in impaired loans during the quarter ended June 30, 2018	2,092		7,005		1,849		2,833		736		990		708		16,213
Interest income recognized on impaired loans during the quarter ended June 30, 20181	28		66		20		37		5		13		8		177
Average recorded investment in impaired loans during the six months ended June 30, 2018	2,104		7,003		1,956		2,878		742		1,043		712		16,438
Interest income recognized on impaired loans during the six months ended June 30, 2018 1	183		132		42		75		10		26		15		483
Average recorded investment in impaired loans during the quarter ended June 30, 2017	2,072		7,000		3,283		3,240		642		1,173		943		18,353
Interest income recognized on impaired loans during the quarter ended June 30, 20171	25		66		20		37		7		14		10		179
Average recorded investment in impaired loans during the six months ended June 30, 2017	2,117		6,998		2,941		3,241		667		1,437		939		18,340
Interest income recognized on impaired loans during the six months ended June 30, 2017 1	48		132		43		71		14		34		20		362

¹ No interest income on impaired loans was recognized on a cash basis during the three months ended June 30, 2018. Interest income recognized on a cash basis totaled $128 thousand during the six months ended June 30, 2018 and was primarily related to the pay-off of two non-accrual commercial PCI loans. No interest income on impaired loans was recognized on a cash basis during the three and six months ended June 30, 2017.

(in thousands)	Commercial and industrial		Commercial real estate, owner-occupied		Commercial real estate, investor		Construction		Home equity		Other residential		Installment and other consumer		Total
December 31, 2017
Recorded investment in impaired loans:
With no specific allowance recorded	$	309	$	—	$	—	$	2,689	$	406	$	995	$	46	$	4,445
With a specific allowance recorded	1,856		6,999		2,171		280		347		153		675		12,481
Total recorded investment in impaired loans	$	2,165	$	6,999	$	2,171	$	2,969	$	753	$	1,148	$	721	$	16,926
Unpaid principal balance of impaired loans	$	2,278	$	6,993	$	2,168	$	2,963	$	750	$	1,147	$	720	$	17,019
Specific allowance	$	50	$	188	$	159	$	7	$	6	$	1	$	102	$	513

Allowance for Credit Losses on Financing Receivables

The following tables disclose activity in the allowance for loan losses ("ALLL") and the recorded investment in loans by class, as well as the related ALLL disaggregated by impairment evaluation method.

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Three months ended June 30, 2018
Beginning balance	$	3,693		$	2,080	$	6,455		$	697		$	979		$	543	$	351		$	973		$	15,771
Provision (reversal)	(1,098		)	259		935			(189		)	(27		)	203		(66		)	(17		)	—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	5			—		—			—			—			—		42			—			47
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Three months ended June 30, 2017
Beginning balance	$	4,413		$	1,992	$	6,133		$	546		$	990		$	444	$	359		$	342		$	15,219
Provision (reversal)	(490		)	90		(68		)	(135		)	(9		)	65		(23		)	570			—
Charge-offs	—			—		—			—			—			—		—			—			—
Recoveries	9			—		—			—			—			—		4			—			13
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

Allowance for Loan Losses Rollforward for the Period
(in thousands)	Commercial and industrial			Commercial real estate, owner-occupied		Commercial real estate, investor			Construction			Home equity			Other residential		Installment and other consumer			Unallocated			Total
Six months ended June 30, 2018
Allowance for loan losses:
Beginning balance	$	3,654		$	2,294	$	6,475		$	681		$	1,031		$	536	$	378		$	718		$	15,767
Provision (reversal)	(1,063		)	45		915			(173		)	(79		)	210		(93		)	238			—
Charge-offs	(3		)	—		—			—			—			—		(2		)	—			(5		)
Recoveries	9			—		—			—			—			—		42			—			51
Ending balance	$	2,597		$	2,339	$	7,390		$	508		$	952		$	746	$	325		$	956		$	15,813
Six months ended June 30, 2017
Allowance for loan losses:
Beginning balance	$	3,248		$	1,753	$	6,320		$	781		$	973		$	454	$	372		$	1,541		$	15,442
Provision (reversal)	896			329		(255		)	(370		)	8			55		(34		)	(629		)	—
Charge-offs	(284		)	—		—			—			—			—		(3		)	—			(287		)
Recoveries	72			—		—			—			—			—		5			—			77
Ending balance	$	3,932		$	2,082	$	6,065		$	411		$	981		$	509	$	340		$	912		$	15,232

Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
June 30, 2018
Ending ALLL related to loans collectively evaluated for impairment	$	2,365		$	2,213		$	7,343		$	508		$	946		$	746		$	233		$	956	$	15,310
Ending ALLL related to loans individually evaluated for impairment	232			126			47			—			6			—			92			—		503
Ending ALLL related to purchased credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	2,597		$	2,339		$	7,390		$	508		$	952		$	746		$	325		$	956	$	15,813
Recorded Investment:
Collectively evaluated for impairment	$	240,035		$	309,376		$	837,022		$	54,324		$	125,211		$	107,840		$	25,784		$	—	$	1,699,592
Individually evaluated for impairment	1,917			7,002			1,844			2,691			732			989			704			—		15,879
Purchased credit-impaired	42			1,209			801			—			88			—			—			—		2,140
Total	$	241,994		$	317,587		$	839,667		$	57,015		$	126,031		$	108,829		$	26,488		$	—	$	1,717,611
Ratio of allowance for loan losses to total loans	1.07		%	0.74		%	0.88		%	0.89		%	0.76		%	0.69		%	1.23		%	NM		0.92		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			247		%	NM			NM			NM		4,107		%

NM - Not Meaningful

Allowance for Loan Losses and Recorded Investment in Loans
(dollars in thousands)	Commercial and industrial			Commercial real estate, owner-occupied			Commercial real estate, investor			Construction			Home equity			Other residential			Installment and other consumer			Unallocated		Total
December 31, 2017
Ending ALLL related to loans collectively evaluated for impairment	$	3,604		$	2,106		$	6,316		$	674		$	1,025		$	535		$	276		$	718	$	15,254
Ending ALLL related to loans individually evaluated for impairment	50			188			159			7			6			1			102			—		513
Ending ALLL related to purchased  credit-impaired loans	—			—			—			—			—			—			—			—		—
Ending balance	$	3,654		$	2,294		$	6,475		$	681		$	1,031		$	536		$	378		$	718	$	15,767
Recorded Investment:
Collectively evaluated for impairment	$	233,605		$	292,798		$	820,023		$	60,859		$	131,620		$	94,378		$	26,689		$	—	$	1,659,972
Individually evaluated for impairment	2,165			6,999			2,171			2,969			753			1,148			721			—		16,926
Purchased credit-impaired	65			1,166			790			—			94			—			—			—		2,115
Total	$	235,835		$	300,963		$	822,984		$	63,828		$	132,467		$	95,526		$	27,410		$	—	$	1,679,013
Ratio of allowance for loan losses to total loans	1.55		%	0.76		%	0.79		%	1.07		%	0.78		%	0.56		%	1.38		%	NM		0.94		%
Allowance for loan losses to non-accrual loans	NM			NM			NM			NM			254		%	NM			NM			NM		3,883		%

NM - Not Meaningful

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period

The following table reflects the unpaid principal balance and related carrying value of PCI loans.

PCI Loans	June 30, 2018				December 31, 2017
(in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
Commercial and industrial	$	125	$	42	$	276	$	65
Commercial real estate, owner occupied	1,271		1,209		1,297		1,166
Commercial real estate, investor	1,049		801		1,064		790
Home equity	220		88		231		94
Total purchased credit-impaired loans	$	2,665	$	2,140	$	2,868	$	2,115

Accretable Yield Activity

The activities in the accretable yield, or income expected to be earned over the remaining lives of the PCI loans were as follows:

Accretable Yield	Three months ended						Six months ended
(in thousands)	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at beginning of period	$	1,142		$	1,386		$	1,254		$	1,476
Accretion	(83		)	(80		)	(195		)	(170		)
Balance at end of period	$	1,059		$	1,306		$	1,059		$	1,306

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Borrowings (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The following table summarizes the contractual terms of the subordinated debentures due to the Trusts as of June 30, 2018:

(in thousands)
Subordinated debentures due to NorCal Community Bancorp Trust I on October 7, 2033 with interest payable quarterly, based on 3-month LIBOR plus 3.05%, repricing quarterly (5.40% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	$	4,124
Subordinated debentures due to NorCal Community Bancorp Trust II on March 15, 2036 with interest payable quarterly, based on 3-month LIBOR plus 1.40%, repricing quarterly (3.74% as of June 30, 2018), redeemable, in whole or in part, on any interest payment date	4,124
Total	$	8,248

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Dividends Declared

The following table summarizes cash dividends paid to common shareholders, recorded as a reduction of retained earnings.

	Three months ended				Six months ended
(in thousands, except per share data)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Cash dividends to common stockholders	$	2,166	$	1,660	$	4,181	$	3,315
Cash dividends per common share	$	0.31	$	0.27	$	0.60	$	0.54

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Undrawn Loan Commitments and Standby Letters of Credit

The contractual amount of undrawn loan commitments and standby letters of credit not reflected in the consolidated statements of condition are as follows:

(in thousands)	June 30, 2018		December 31, 2017
Commercial lines of credit	$	222,547	$	224,370
Revolving home equity lines	186,652		177,678
Undisbursed construction loans	34,336		35,322
Personal and other lines of credit	12,408		11,758
Standby letters of credit	2,207		4,074
Total commitments and standby letters of credit	$	458,150	$	453,202

Schedule of Future Minimum Rental Payments for Operating Leases

At June 30, 2018, the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows:

(in thousands)	2018		2019		2020		2021		2022		Thereafter		Total
Operating leases	$	2,209	$	4,198	$	3,758	$	2,138	$	1,330	$	2,904	$	16,537

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Derivative Financial Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following tables presents the notional amount and fair value of our derivatives designated as hedging instruments:

	Derivative Assets				Derivative Liabilities
(in thousands)	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Fair value hedges:
Interest rate contracts notional amount	$	9,081	$	4,019	$	9,293	$	14,810
Interest rate contracts fair value1	$	327	$	74	$	276	$	740

¹ See Note 3,Fair Value of Assets and Liabilities, for valuation methodology.

The table below presents the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of hedged assets as of June 30, 2018:

(in thousands)	Carrying Amounts of Hedged Assets		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans
Loans	$	18,112	$	(262	)

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

The table below presents the net gains (losses) recognized in interest income on loans on the consolidated statements of comprehensive income related to our derivatives designated as fair value hedges:

	Three months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	187		$	(129	)
Payment on interest rate swaps	$	(40	)	$	(87	)
(Decrease) increase in value of hedged loans	$	(116	)	$	191
Decrease in value of yield maintenance agreement	$	(3	)	$	(4	)
Net gain (loss) on fair value hedging relationships recognized in interest income	$	28		$	(29	)
	Six months ended
(in thousands)	June 30, 2018			June 30, 2017
Increase (decrease) in value of designated interest rate swaps	$	716		$	(18	)
Payment on interest rate swaps	$	(95	)	$	(185	)
(Decrease) increase in value of hedged loans	$	(693	)	$	78
Decrease in value of yield maintenance agreement	$	(7	)	$	(7	)
Net loss on fair value hedging relationships recognized against interest income	$	(79	)	$	(132	)

Offsetting Assets

The following table shows information on financial instruments that are eligible for offset in the consolidated statements of condition.

Offsetting of Financial Assets and Derivative Assets
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Assets Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Assets1		Condition		of Condition1		Instruments			Received		Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	327	$	—	$	327	$	(276	)	$	—	$	51
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	74	$	—	$	74	$	(74	)	$	—	$	—

¹ Amounts exclude accrued interest totaling less than $1 thousand at both June 30, 2018 and December 31, 2017.

Offsetting of Financial Liabilities and Derivative Liabilities
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Liabilities Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Liabilities2		Condition		of Condition2		Instruments			Pledged			Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	276	$	—	$	276	$	(276	)				$	—
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	740	$	—	$	740	$	(74	)	$	(666	)	$	—

Offsetting Liabilities

Offsetting of Financial Liabilities and Derivative Liabilities
			Gross Amounts		Net Amounts of		Gross Amounts Not Offset in
	Gross Amounts		Offset in the		Liabilities Presented		the Statements of Condition
	of Recognized		Statements of		in the Statements		Financial			Cash Collateral
(in thousands)	Liabilities2		Condition		of Condition2		Instruments			Pledged			Net Amount
June 30, 2018
Derivatives by Counterparty:
Counterparty A	$	276	$	—	$	276	$	(276	)				$	—
December 31, 2017
Derivatives by Counterparty:
Counterparty A	$	740	$	—	$	740	$	(74	)	$	(666	)	$	—

² Amounts exclude accrued interest totaling $4 thousand and $8 thousand at June 30, 2018 and December 31, 2017, respectively.

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Acquisition (Tables)

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Schedule Of Acquisition-Related Expenses

Bank of Marin Bancorp incurred acquisition-related expenses in the consolidated statements of comprehensive income for the three and six months ended June 30, 2018 as follows:

(in thousands)	Three months ended June 30, 2018		Six months ended June 30, 2018
Data processing1	$	163	$	555
Professional services	31		126
Personnel severance	35		141
Other	21		43
Total	$	250	$	865
1 Primarily relates to Bank of Napa's core processing system contract termination and deconversion fees.

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Basis of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (shares)	6,944	6,110	6,929	6,101
Potentially dilutive common shares related to:
Stock options (shares)	74	52	74	57
Unvested restricted stock awards (shares)	15	12	16	15
Weighted average diluted shares outstanding (shares)	7,033	6,174	7,019	6,173
Net income	$ 7,891	$ 5,186	$ 14,280	$ 9,734	$ 15,976
Basic EPS (usd per share)	$ 1.14	$ 0.85	$ 2.06	$ 1.60
Diluted EPS (usd per share)	$ 1.12	$ 0.84	$ 2.03	$ 1.58
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (shares)	30	33	35	23

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Recently Adopted and Issued Accounting Standards (Details) $ in Millions	Jun. 30, 2018 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Undiscounted operating lease obligations, off-balance sheet	$ 16.5

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Fair Value of Assets and Liabilities - Recorded on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 388,137	$ 332,467
SBA-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	23,954	25,982
Debentures of government- sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,139	12,938
Privately-issued collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	435	1,431
Obligations of state and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	87,788	97,491
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,027	6,564
Assets and liabilities at fair value measured on a recurring basis | Carrying Value | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial assets (interest rate contracts)	327	74
Derivative financial liabilities (interest rate contracts)	276	740
Assets and liabilities at fair value measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial assets (interest rate contracts)	0	0
Derivative financial liabilities (interest rate contracts)	0	0
Assets and liabilities at fair value measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial assets (interest rate contracts)	327	74
Derivative financial liabilities (interest rate contracts)	276	740
Assets and liabilities at fair value measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial assets (interest rate contracts)	0	0
Derivative financial liabilities (interest rate contracts)	0	0
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	240,794	188,061
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	240,794	188,061
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	23,954	25,982
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	23,954	25,817
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	165
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,139	12,938
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	32,139	12,938
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Privately-issued collateralized mortgage obligations | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	435	1,431
Assets and liabilities at fair value measured on a recurring basis | Privately-issued collateralized mortgage obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Privately-issued collateralized mortgage obligations | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	435	1,431
Assets and liabilities at fair value measured on a recurring basis | Privately-issued collateralized mortgage obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	87,788	97,491
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	87,788	97,491
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,027	6,564
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,027	6,564
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	$ 0

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Fair Value of Assets and Liabilities - Narrative (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($) security	Dec. 31, 2017 USD ($) security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Write down of held to maturity securities | $	$ 0	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value | $	$ 0	$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities | security	0	0
U.S. government agency obligation collateralized by loans guaranteed by SBA program | Available-for-sale Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities | security	1

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Fair Value of Assets and Liabilities - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	$ 166,127	$ 151,032
Carrying Amounts | Level 1
Financial assets (recorded at amortized cost)
Cash and cash equivalents	83,855	203,545
Carrying Amounts | Level 2
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	170,652	151,032
Interest receivable	7,814	7,501
Financial liabilities (recorded at amortized cost)
Time deposits	137,040	160,116
Interest payable	167	191
Carrying Amounts | Level 3
Financial assets (recorded at amortized cost)
Loans, net	1,701,798	1,663,246
Financial liabilities (recorded at amortized cost)
Subordinated debentures	5,802	5,739
Fair Value | Level 1
Financial assets (recorded at amortized cost)
Cash and cash equivalents	83,855	203,545
Fair Value | Level 2
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	166,127	151,032
Interest receivable	7,814	7,501
Financial liabilities (recorded at amortized cost)
Time deposits	136,023	159,540
Interest payable	167	191
Fair Value | Level 3
Financial assets (recorded at amortized cost)
Loans, net	1,666,409	1,650,198
Financial liabilities (recorded at amortized cost)
Subordinated debentures	$ 6,988	$ 5,118

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Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	$ 170,652	$ 151,032
Held to maturity, Fair Value	166,127	151,032
Held-to-maturity, Gross Unrealized Gains	235	619
Held-to-maturity, Gross Unrealized Losses	(4,760)	(619)
Total	397,268	334,285
Available-for-sale, at fair value	388,137	332,467
Available-for-sale, Gross Unrealized Gains	132	574
Available-for-sale, Gross Unrealized Losses	(9,263)	(2,392)
Total investment securities, Amortized Cost	567,920	485,317
Total investment securities, Fair Value	554,264	483,499
Total investment securities, Gross Unrealized Gains	367	1,193
Total investment securities, Gross Unrealized Losses	(14,023)	(3,011)
MBS pass-through securities issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	94,203	100,376
Held to maturity, Fair Value	90,824	100,096
Held-to-maturity, Gross Unrealized Gains	0	234
Held-to-maturity, Gross Unrealized Losses	(3,379)	(514)
Total	90,082	65,559
Available-for-sale, at fair value	87,590	65,262
Available-for-sale, Gross Unrealized Gains	17	126
Available-for-sale, Gross Unrealized Losses	(2,509)	(423)
SBA-backed securities
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	8,882	0
Held to maturity, Fair Value	8,743	0
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	(139)	0
Total	24,620	25,979
Available-for-sale, at fair value	23,954	25,982
Available-for-sale, Gross Unrealized Gains	0	58
Available-for-sale, Gross Unrealized Losses	(666)	(55)
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	11,881	0
Held to maturity, Fair Value	11,766	0
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	(115)	0
Total	21,026	35,340
Available-for-sale, at fair value	20,571	35,125
Available-for-sale, Gross Unrealized Gains	7	33
Available-for-sale, Gross Unrealized Losses	(462)	(248)
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	34,668	31,010
Held to maturity, Fair Value	33,591	30,938
Held-to-maturity, Gross Unrealized Gains	0	2
Held-to-maturity, Gross Unrealized Losses	(1,077)	(74)
Total	123,359	70,514
Available-for-sale, at fair value	120,411	69,889
Available-for-sale, Gross Unrealized Gains	1	3
Available-for-sale, Gross Unrealized Losses	(2,949)	(628)
CMOs issued by GNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	3,730	0
Held to maturity, Fair Value	3,713	0
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	(17)	0
Total	12,641	17,953
Available-for-sale, at fair value	12,222	17,785
Available-for-sale, Gross Unrealized Gains	2	26
Available-for-sale, Gross Unrealized Losses	(421)	(194)
Debentures of government- sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Total	32,395	12,940
Available-for-sale, at fair value	32,139	12,938
Available-for-sale, Gross Unrealized Gains	0	3
Available-for-sale, Gross Unrealized Losses	(256)	(5)
Privately issued CMOs
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Total	431	1,432
Available-for-sale, at fair value	435	1,431
Available-for-sale, Gross Unrealized Gains	4	1
Available-for-sale, Gross Unrealized Losses	0	(2)
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	17,288	19,646
Held to maturity, Fair Value	17,490	19,998
Held-to-maturity, Gross Unrealized Gains	235	383
Held-to-maturity, Gross Unrealized Losses	(33)	(31)
Total	89,699	98,027
Available-for-sale, at fair value	87,788	97,491
Available-for-sale, Gross Unrealized Gains	77	298
Available-for-sale, Gross Unrealized Losses	(1,988)	(834)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Total	3,015	6,541
Available-for-sale, at fair value	3,027	6,564
Available-for-sale, Gross Unrealized Gains	24	26
Available-for-sale, Gross Unrealized Losses	$ (12)	$ (3)

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Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Held-to-maturity Securities, Amortized Cost
Within one year	$ 2,859	$ 2,151
After one but within five years	13,063	15,577
After five years through ten years	63,321	54,641
After ten years	91,409	78,663
Total	170,652	151,032
Held-to-maturity Securities, Fair Value
Within one year	2,882	2,172
After one but within five years	13,147	15,791
After five years through ten years	61,350	54,554
After ten years	88,748	78,515
Total	166,127	151,032
Available-for-sale Securities, Amortized Cost
Within one year	8,272	10,268
After one but within five years	79,662	71,576
After five years through ten years	216,584	129,723
After ten years	92,750	122,718
Total	397,268	334,285
Available-for-sale Securities, Fair Value
Within one year	8,263	10,272
After one but within five years	78,514	71,237
After five years through ten years	210,650	128,954
After ten years	90,710	122,004
Total	$ 388,137	$ 332,467

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Investment Securities - Sales of investment securities and gross gains and losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Available-for-sale:
Sales proceeds	$ 5,006	$ 1,321	$ 5,006	$ 1,321
Gross realized gains	27	13	27	13
Gross realized losses	$ 16	$ 3	$ 16	$ 3

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Investment Securities - Pledged and Transferred Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Public Deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	$ 103,097	$ 107,829
Trust Deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	749	761
State of California
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	103,846	108,590
Internal checking account
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	$ 2,014	$ 2,026

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Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($) security	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) security	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) security
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Securities transferred from available-for-sale to held-to-maturity | $			$ 27,422	$ 128,965	$ 129,000
Unrealized pre-tax loss from transfer of available-for-sale securities to held-to-maturity | $			278		3,000
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity | $	$ 132	$ 124	$ 268	$ 165	$ 165
Number of investment securities other-than-temporarily impaired	0		0
Number of investment securities in unrealized loss position	266		266		198
Number of investment securities in unrealized loss position longer than 12 months	64		64
Number of investment securities in unrealized loss position less than 12 months	201		201
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position longer than 12 months	5		5
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position longer than 12 months	3		3
CMOs issued by GNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position longer than 12 months	2		2
MBS pass-through securities issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position longer than 12 months	22		22
Number of investment securities in unrealized loss position less than 12 months	36		36
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position longer than 12 months	32		32
Number of investment securities in unrealized loss position less than 12 months	98		98
SBA-backed securities
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position less than 12 months	11		11
Debentures of government- sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position less than 12 months	8		8
Collateralized Mortgage Obligations
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position less than 12 months	46		46
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities in unrealized loss position less than 12 months	3		3

XML

Investment Securities - Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	$ 66,222	$ 31,051
Greater than or equal to 12 continuous months	86,230	60,669
Total Securities in a loss position	152,452	91,720
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(1,681)	(205)
Greater than or equal to 12 continuous months	(3,079)	(414)
Held-to-maturity, Gross Unrealized Losses	(4,760)	(619)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	326,092	212,675
Available-for-sale, greater than 12 continuous months, Fair value	41,790	40,478
Available-for-sale, Total Securities in a loss position, Fair Value	367,882	253,153
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(7,301)	(1,465)
Available-for-sale, greater than 12 continuous months, Unrealized loss	(1,962)	(927)
Available-for-sale, Total Securities in a loss position, Unrealized loss	(9,263)	(2,392)
Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Marketable securities, less than 12 continuous months, Fair value	392,314	243,726
Marketable securities, greater than 12 continuous months, Fair value	128,020	101,147
Marketable securities, Total Securities in a loss position, Fair value	520,334	344,873
Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Marketable securities, less than 12 continuous months, Unrealized loss	(8,982)	(1,670)
Marketable securities, greater than 12 continuous months, Unrealized loss	(5,041)	(1,341)
Marketable securities, Total Securities in a loss position, Unrealized loss	(14,023)	(3,011)
MBS pass-through securities issued by FHLMC and FNMA
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	22,100	16,337
Greater than or equal to 12 continuous months	68,724	46,845
Total Securities in a loss position	90,824	63,182
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(830)	(143)
Greater than or equal to 12 continuous months	(2,549)	(371)
Held-to-maturity, Gross Unrealized Losses	(3,379)	(514)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	68,906	32,189
Available-for-sale, greater than 12 continuous months, Fair value	17,713	15,325
Available-for-sale, Total Securities in a loss position, Fair Value	86,619	47,514
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(1,843)	(121)
Available-for-sale, greater than 12 continuous months, Unrealized loss	(666)	(302)
Available-for-sale, Total Securities in a loss position, Unrealized loss	(2,509)	(423)
SBA-backed securities
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	8,742
Greater than or equal to 12 continuous months	0
Total Securities in a loss position	8,742
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(139)
Greater than or equal to 12 continuous months	0
Held-to-maturity, Gross Unrealized Losses	(139)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	23,954	11,028
Available-for-sale, greater than 12 continuous months, Fair value	0	165
Available-for-sale, Total Securities in a loss position, Fair Value	23,954	11,193
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(666)	(53)
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	(2)
Available-for-sale, Total Securities in a loss position, Unrealized loss	(666)	(55)
CMOs issued by FNMA
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	11,766
Greater than or equal to 12 continuous months	0
Total Securities in a loss position	11,766
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(115)
Greater than or equal to 12 continuous months	0
Held-to-maturity, Gross Unrealized Losses	(115)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	15,687	26,401
Available-for-sale, greater than 12 continuous months, Fair value	4,642	5,440
Available-for-sale, Total Securities in a loss position, Fair Value	20,329	31,841
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(321)	(171)
Available-for-sale, greater than 12 continuous months, Unrealized loss	(141)	(77)
Available-for-sale, Total Securities in a loss position, Unrealized loss	(462)	(248)
CMOs issued by FHLMC
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	19,798	11,066
Greater than or equal to 12 continuous months	13,793	13,824
Total Securities in a loss position	33,591	24,890
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(564)	(31)
Greater than or equal to 12 continuous months	(513)	(43)
Held-to-maturity, Gross Unrealized Losses	(1,077)	(74)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	115,370	69,276
Available-for-sale, greater than 12 continuous months, Fair value	0	0
Available-for-sale, Total Securities in a loss position, Fair Value	115,370	69,276
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(2,949)	(628)
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	0
Available-for-sale, Total Securities in a loss position, Unrealized loss	(2,949)	(628)
CMOs issued by GNMA
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	0
Greater than or equal to 12 continuous months	3,713
Total Securities in a loss position	3,713
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	0
Greater than or equal to 12 continuous months	(17)
Held-to-maturity, Gross Unrealized Losses	(17)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	11,297	14,230
Available-for-sale, greater than 12 continuous months, Fair value	603	0
Available-for-sale, Total Securities in a loss position, Fair Value	11,900	14,230
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(419)	(194)
Available-for-sale, greater than 12 continuous months, Unrealized loss	(2)	0
Available-for-sale, Total Securities in a loss position, Unrealized loss	(421)	(194)
Debentures of government- sponsored agencies
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	32,139	2,984
Available-for-sale, greater than 12 continuous months, Fair value	0	0
Available-for-sale, Total Securities in a loss position, Fair Value	32,139	2,984
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(256)	(5)
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	0
Available-for-sale, Total Securities in a loss position, Unrealized loss	(256)	(5)
Privately issued CMOs
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	0	1,310
Available-for-sale, greater than 12 continuous months, Fair value	0	0
Available-for-sale, Total Securities in a loss position, Fair Value	0	1,310
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	0	(2)
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	0
Available-for-sale, Total Securities in a loss position, Unrealized loss	0	(2)
Obligations of state and political subdivisions
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	3,816	3,648
Greater than or equal to 12 continuous months	0	0
Total Securities in a loss position	3,816	3,648
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(33)	(31)
Greater than or equal to 12 continuous months	0	0
Held-to-maturity, Gross Unrealized Losses	(33)	(31)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	57,217	52,197
Available-for-sale, greater than 12 continuous months, Fair value	18,832	19,548
Available-for-sale, Total Securities in a loss position, Fair Value	76,049	71,745
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(835)	(288)
Available-for-sale, greater than 12 continuous months, Unrealized loss	(1,153)	(546)
Available-for-sale, Total Securities in a loss position, Unrealized loss	(1,988)	(834)
Corporate bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale, less than 12 continuous months, Fair value	1,522	3,060
Available-for-sale, greater than 12 continuous months, Fair value	0	0
Available-for-sale, Total Securities in a loss position, Fair Value	1,522	3,060
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, Unrealized loss	(12)	(3)
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	0
Available-for-sale, Total Securities in a loss position, Unrealized loss	$ (12)	$ (3)

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Investment Securities - Non-Marketable Securities (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($)	Jul. 26, 2018
Schedule of Equity Method Investments [Line Items]
Federal Home Loan Bank stock, par value (usd per share) | $ / shares	$ 100
Investments in low income housing tax credit funds	$ 4,900,000	$ 2,100,000
Low income housing tax credits and other tax benefits	282,000
Low income housing amortization expense	237,000
Unfunded commitments for low income housing tax credit funds	$ 3,200,000
Visa Inc. Class B common stock
Schedule of Equity Method Investments [Line Items]
Number of shares of securities carried at cost | shares	16,939
Carrying value of securities carried at cost	$ 0
Fair value of Class B common stock	$ 3,700,000	$ 3,200,000
Visa Inc. | Visa Inc. Class B common stock
Schedule of Equity Method Investments [Line Items]
Conversion rate on common stock	1.6298	1.6483
Other assets
Schedule of Equity Method Investments [Line Items]
Federal Home Loan Bank stock	$ 11,100,000	$ 11,100,000
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Federal Home Loan Bank, dividend rate percentage			7.00%

XML

Loans and Allowance for Loan Losses - Outstanding and Aging Analysis (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 88,000	$ 2,331,000
Current	1,717,523,000	1,676,682,000
Total loans	1,717,611,000	1,679,013,000
Non-accrual	$ 385,000	$ 406,000
Number of purchase credit impaired (PCI) loans with unpaid balances | loan	1	3
Unpaid balances on purchase credit impaired (PCI) loans	$ 6,000	$ 131,000
Purchased Credit Impaired (PCI) loans no longer accreting interest	0	0
Purchased Credit-impaired (PCI) loans accreting interest	2,100,000	2,100,000
Loans past due more than 90 days still accruing	0	0
Deferred loan fees	800,000	818,000
Unaccreted purchase discounts on non-PCI loans	956,000	1,200,000
30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	88,000	684,000
60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	1,340,000
90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	307,000
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	1,340,000
Current	241,994,000	234,495,000
Total loans	241,994,000	235,835,000
Non-accrual	0	0
Commercial loans | Commercial and industrial | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial loans | Commercial and industrial | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	1,340,000
Commercial loans | Commercial and industrial | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Current	317,587,000	300,963,000
Total loans	317,587,000	300,963,000
Non-accrual	0	0
Commercial real estate loans | Commercial real estate, owner-occupied | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, owner-occupied | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, owner-occupied | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Current	839,667,000	822,984,000
Total loans	839,667,000	822,984,000
Non-accrual	0	0
Commercial real estate loans | Commercial real estate, investor | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, investor | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Commercial real estate, investor | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Current	57,015,000	63,828,000
Total loans	57,015,000	63,828,000
Non-accrual	0	0
Commercial real estate loans | Construction | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Construction | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Construction | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	77,000	406,000
Current	125,954,000	132,061,000
Total loans	126,031,000	132,467,000
Non-accrual	385,000	406,000
Residential loans | Home equity | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	77,000	99,000
Residential loans | Home equity | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Residential loans | Home equity | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	307,000
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	255,000
Current	108,829,000	95,271,000
Total loans	108,829,000	95,526,000
Non-accrual	0	0
Residential loans | Other residential | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	255,000
Residential loans | Other residential | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Residential loans | Other residential | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	11,000	330,000
Current	26,477,000	27,080,000
Total loans	26,488,000	27,410,000
Non-accrual	0	0
Consumer loans | Installment and other consumer | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	11,000	330,000
Consumer loans | Installment and other consumer | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Consumer loans | Installment and other consumer | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 0	$ 0

XML

Loans and Allowance for Loan Losses - Credit Quality (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,717,611	$ 1,679,013
Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	2,140	2,115
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,676,595	1,629,865
Pass | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	2,140	1,325
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	27,099	21,242
Special Mention | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	790
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,917	27,906
Substandard | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Commercial loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	241,952	235,770
Total loans	241,994	235,835
Commercial loans | Commercial and industrial | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	42	65
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	224,707	214,636
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	14,842	9,318
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,403	11,816
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	316,378	299,797
Total loans	317,587	300,963
Commercial real estate loans | Commercial real estate, owner-occupied | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	1,209	1,166
Commercial real estate loans | Commercial real estate, owner-occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	299,469	281,104
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	8,904	9,284
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	8,005	9,409
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	838,866	822,194
Total loans	839,667	822,984
Commercial real estate loans | Commercial real estate, investor | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	801	790
Commercial real estate loans | Commercial real estate, investor | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	836,634	818,570
Commercial real estate loans | Commercial real estate, investor | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,232	1,850
Commercial real estate loans | Commercial real estate, investor | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	1,774
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	57,015	63,828
Total loans	57,015	63,828
Commercial real estate loans | Construction | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	54,324	60,859
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	0
Commercial real estate loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,691	2,969
Residential loans | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	125,943	132,373
Total loans	126,031	132,467
Residential loans | Home equity | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	88	94
Residential loans | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	124,103	130,558
Residential loans | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,121	0
Residential loans | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	719	1,815
Residential loans | Other residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	108,829	95,526
Residential loans | Other residential | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Residential loans | Other residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	108,829	95,526
Residential loans | Other residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential loans | Other residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer loans | Installment and other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,488	27,410
Consumer loans | Installment and other consumer | Purchased credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchased credit-impaired	0	0
Consumer loans | Installment and other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,389	27,287
Consumer loans | Installment and other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer loans | Installment and other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 99	$ 123

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Loans and Allowance for Loan Losses - Troubled Debt Restructuring by Class (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans removed from TDR designation | loan	1	0
Recorded investment of loans removed from TDR resignation	$ 150,000
Recorded investment in Troubled Debt Restructurings	15,494,000	$ 16,520,000
TDR loans on non-accrual status		0
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	1,917,000	2,165,000
Commercial real estate loans | Commercial real estate, owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	7,002,000	6,999,000
Commercial real estate loans | Commercial real estate, investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	1,844,000	2,171,000
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	2,691,000	2,969,000
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	348,000	347,000
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	988,000	1,148,000
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings	$ 704,000	$ 721,000

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Loans and Allowance for Loan Losses - Troubled Debt Restructuring Modifications (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Jun. 30, 2018 USD ($) contract loan	Jun. 30, 2017 USD ($) contract loan	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract		0
Pre-Modification Outstanding Recorded Investment		$ 0
Post-Modification Outstanding Recorded Investment		0
Post-Modification Outstanding Recorded Investment at Period End		$ 0
Number of modified TDR loans that defaulted | loan			0	0
Purchased Credit-impaired (PCI) loans accreting interest	$ 2,100		$ 2,100		$ 2,100
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract	2		2
Pre-Modification Outstanding Recorded Investment	$ 254		$ 254
Post-Modification Outstanding Recorded Investment	245		245
Post-Modification Outstanding Recorded Investment at Period End	$ 235		$ 235
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract				1
Pre-Modification Outstanding Recorded Investment				$ 50
Post-Modification Outstanding Recorded Investment				50
Post-Modification Outstanding Recorded Investment at Period End				$ 49

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Loans and Allowance for Loan Losses - Impaired and Related Allowance (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Recorded investment in impaired loans:
With no specific allowance recorded	$ 4,417,000		$ 4,417,000		$ 4,445,000
With a specific allowance recorded	11,462,000		11,462,000		12,481,000
Total recorded investment in impaired loans	15,879,000		15,879,000		16,926,000
Unpaid principal balance of impaired loans	15,842,000		15,842,000		17,019,000
Specific allowance	503,000		503,000		513,000
Average recorded investment in impaired loans during the period	16,213,000	$ 18,353,000	16,438,000	$ 18,340,000
Interest income recognized on impaired loans during the period ended	177,000	179,000	483,000	362,000
Interest income recognized on impaired loans during the period ended, cash basis			128,000	0
Outstanding commitments to extend credit on impaired loans	850,000		850,000		935,000
Commercial loans | Commercial and industrial
Recorded investment in impaired loans:
With no specific allowance recorded	306,000		306,000		309,000
With a specific allowance recorded	1,611,000		1,611,000		1,856,000
Total recorded investment in impaired loans	1,917,000		1,917,000		2,165,000
Unpaid principal balance of impaired loans	1,905,000		1,905,000		2,278,000
Specific allowance	232,000		232,000		50,000
Average recorded investment in impaired loans during the period	2,092,000	2,072,000	2,104,000	2,117,000
Interest income recognized on impaired loans during the period ended	28,000	25,000	183,000	48,000
Commercial real estate loans | Commercial real estate, owner-occupied
Recorded investment in impaired loans:
With no specific allowance recorded	0		0		0
With a specific allowance recorded	7,002,000		7,002,000		6,999,000
Total recorded investment in impaired loans	7,002,000		7,002,000		6,999,000
Unpaid principal balance of impaired loans	6,993,000		6,993,000		6,993,000
Specific allowance	126,000		126,000		188,000
Average recorded investment in impaired loans during the period	7,005,000	7,000,000	7,003,000	6,998,000
Interest income recognized on impaired loans during the period ended	66,000	66,000	132,000	132,000
Commercial real estate loans | Commercial real estate, investor
Recorded investment in impaired loans:
With no specific allowance recorded	0		0		0
With a specific allowance recorded	1,844,000		1,844,000		2,171,000
Total recorded investment in impaired loans	1,844,000		1,844,000		2,171,000
Unpaid principal balance of impaired loans	1,837,000		1,837,000		2,168,000
Specific allowance	47,000		47,000		159,000
Average recorded investment in impaired loans during the period	1,849,000	3,283,000	1,956,000	2,941,000
Interest income recognized on impaired loans during the period ended	20,000	20,000	42,000	43,000
Commercial real estate loans | Construction
Recorded investment in impaired loans:
With no specific allowance recorded	2,691,000		2,691,000		2,689,000
With a specific allowance recorded	0		0		280,000
Total recorded investment in impaired loans	2,691,000		2,691,000		2,969,000
Unpaid principal balance of impaired loans	2,688,000		2,688,000		2,963,000
Specific allowance	0		0		7,000
Average recorded investment in impaired loans during the period	2,833,000	3,240,000	2,878,000	3,241,000
Interest income recognized on impaired loans during the period ended	37,000	37,000	75,000	71,000
Residential loans | Home equity
Recorded investment in impaired loans:
With no specific allowance recorded	385,000		385,000		406,000
With a specific allowance recorded	347,000		347,000		347,000
Total recorded investment in impaired loans	732,000		732,000		753,000
Unpaid principal balance of impaired loans	729,000		729,000		750,000
Specific allowance	6,000		6,000		6,000
Average recorded investment in impaired loans during the period	736,000	642,000	742,000	667,000
Interest income recognized on impaired loans during the period ended	5,000	7,000	10,000	14,000
Residential loans | Other residential
Recorded investment in impaired loans:
With no specific allowance recorded	989,000		989,000		995,000
With a specific allowance recorded	0		0		153,000
Total recorded investment in impaired loans	989,000		989,000		1,148,000
Unpaid principal balance of impaired loans	987,000		987,000		1,147,000
Specific allowance	0		0		1,000
Average recorded investment in impaired loans during the period	990,000	1,173,000	1,043,000	1,437,000
Interest income recognized on impaired loans during the period ended	13,000	14,000	26,000	34,000
Consumer loans | Installment and other consumer
Recorded investment in impaired loans:
With no specific allowance recorded	46,000		46,000		46,000
With a specific allowance recorded	658,000		658,000		675,000
Total recorded investment in impaired loans	704,000		704,000		721,000
Unpaid principal balance of impaired loans	703,000		703,000		720,000
Specific allowance	92,000		92,000		$ 102,000
Average recorded investment in impaired loans during the period	708,000	943,000	712,000	939,000
Interest income recognized on impaired loans during the period ended	$ 8,000	$ 10,000	$ 15,000	$ 20,000

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Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Allowance for loan losses:
Beginning balance	$ 15,771	$ 15,219	$ 15,767	$ 15,442
Provision for loan losses	0	0	0	0
Charge-offs	(5)	0	(5)	(287)
Recoveries	47	13	51	77
Ending balance	15,813	15,232	15,813	15,232
Ending ALLL related to loans collectively evaluated for impairment	15,310		15,310		$ 15,254
Ending ALLL related to loans individually evaluated for impairment	503		503		513
Ending ALLL	15,813		15,813		15,767
Collectively evaluated for impairment	1,699,592		1,699,592		1,659,972
Individually evaluated for impairment	15,879		15,879		16,926
Total loans	$ 1,717,611		$ 1,717,611		$ 1,679,013
Ratio of allowance for loan losses to total loans	0.92%		0.92%		0.94%
Allowance for loan losses to non-accrual loans	4107.00%		4107.00%		3883.00%
Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	2,140		2,140		2,115
Commercial loans | Commercial and industrial
Allowance for loan losses:
Beginning balance	3,693	4,413	3,654	3,248
Provision for loan losses	(1,098)	(490)	(1,063)	896
Charge-offs	(3)	0	(3)	(284)
Recoveries	5	9	9	72
Ending balance	2,597	3,932	2,597	3,932
Ending ALLL related to loans collectively evaluated for impairment	2,365		2,365		3,604
Ending ALLL related to loans individually evaluated for impairment	232		232		50
Ending ALLL	2,597		2,597		3,654
Collectively evaluated for impairment	240,035		240,035		233,605
Individually evaluated for impairment	1,917		1,917		2,165
Total loans	$ 241,994		$ 241,994		$ 235,835
Ratio of allowance for loan losses to total loans	1.07%		1.07%		1.55%
Commercial loans | Commercial and industrial | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	42		42		65
Commercial real estate loans | Commercial real estate, owner-occupied
Allowance for loan losses:
Beginning balance	2,080	1,992	2,294	1,753
Provision for loan losses	259	90	45	329
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	2,339	2,082	2,339	2,082
Ending ALLL related to loans collectively evaluated for impairment	2,213		2,213		2,106
Ending ALLL related to loans individually evaluated for impairment	126		126		188
Ending ALLL	2,339		2,339		2,294
Collectively evaluated for impairment	309,376		309,376		292,798
Individually evaluated for impairment	7,002		7,002		6,999
Total loans	$ 317,587		$ 317,587		$ 300,963
Ratio of allowance for loan losses to total loans	0.74%		0.74%		0.76%
Commercial real estate loans | Commercial real estate, owner-occupied | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	1,209		1,209		1,166
Commercial real estate loans | Commercial real estate, investor
Allowance for loan losses:
Beginning balance	6,455	6,133	6,475	6,320
Provision for loan losses	935	(68)	915	(255)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	7,390	6,065	7,390	6,065
Ending ALLL related to loans collectively evaluated for impairment	7,343		7,343		6,316
Ending ALLL related to loans individually evaluated for impairment	47		47		159
Ending ALLL	7,390		7,390		6,475
Collectively evaluated for impairment	837,022		837,022		820,023
Individually evaluated for impairment	1,844		1,844		2,171
Total loans	$ 839,667		$ 839,667		$ 822,984
Ratio of allowance for loan losses to total loans	0.88%		0.88%		0.79%
Commercial real estate loans | Commercial real estate, investor | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	801		801		790
Commercial real estate loans | Construction
Allowance for loan losses:
Beginning balance	697	546	681	781
Provision for loan losses	(189)	(135)	(173)	(370)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	508	411	508	411
Ending ALLL related to loans collectively evaluated for impairment	508		508		674
Ending ALLL related to loans individually evaluated for impairment	0		0		7
Ending ALLL	508		508		681
Collectively evaluated for impairment	54,324		54,324		60,859
Individually evaluated for impairment	2,691		2,691		2,969
Total loans	$ 57,015		$ 57,015		$ 63,828
Ratio of allowance for loan losses to total loans	0.89%		0.89%		1.07%
Commercial real estate loans | Construction | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	0		0		0
Residential loans | Home equity
Allowance for loan losses:
Beginning balance	979	990	1,031	973
Provision for loan losses	(27)	(9)	(79)	8
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	952	981	952	981
Ending ALLL related to loans collectively evaluated for impairment	946		946		1,025
Ending ALLL related to loans individually evaluated for impairment	6		6		6
Ending ALLL	952		952		1,031
Collectively evaluated for impairment	125,211		125,211		131,620
Individually evaluated for impairment	732		732		753
Total loans	$ 126,031		$ 126,031		$ 132,467
Ratio of allowance for loan losses to total loans	0.76%		0.76%		0.78%
Allowance for loan losses to non-accrual loans	247.00%		247.00%		254.00%
Residential loans | Home equity | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	88		88		94
Residential loans | Other residential
Allowance for loan losses:
Beginning balance	543	444	536	454
Provision for loan losses	203	65	210	55
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	746	509	746	509
Ending ALLL related to loans collectively evaluated for impairment	746		746		535
Ending ALLL related to loans individually evaluated for impairment	0		0		1
Ending ALLL	746		746		536
Collectively evaluated for impairment	107,840		107,840		94,378
Individually evaluated for impairment	989		989		1,148
Total loans	$ 108,829		$ 108,829		$ 95,526
Ratio of allowance for loan losses to total loans	0.69%		0.69%		0.56%
Residential loans | Other residential | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	0		0		0
Consumer loans | Installment and other consumer
Allowance for loan losses:
Beginning balance	351	359	378	372
Provision for loan losses	(66)	(23)	(93)	(34)
Charge-offs	(2)	0	(2)	(3)
Recoveries	42	4	42	5
Ending balance	325	340	325	340
Ending ALLL related to loans collectively evaluated for impairment	233		233		276
Ending ALLL related to loans individually evaluated for impairment	92		92		102
Ending ALLL	325		325		378
Collectively evaluated for impairment	25,784		25,784		26,689
Individually evaluated for impairment	704		704		721
Total loans	$ 26,488		$ 26,488		$ 27,410
Ratio of allowance for loan losses to total loans	1.23%		1.23%		1.38%
Consumer loans | Installment and other consumer | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	$ 0		$ 0		$ 0
Purchased credit-impaired	0		0		0
Unallocated
Allowance for loan losses:
Beginning balance	973	342	718	1,541
Provision for loan losses	(17)	570	238	(629)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	956	$ 912	956	$ 912
Ending ALLL related to loans collectively evaluated for impairment	956		956		718
Ending ALLL related to loans individually evaluated for impairment	0		0		0
Ending ALLL	956		956		718
Collectively evaluated for impairment	0		0		0
Individually evaluated for impairment	0		0		0
Total loans	0		0		0
Unallocated | Purchased credit-impaired
Allowance for loan losses:
Ending ALLL	0		0		0
Purchased credit-impaired	$ 0		$ 0		$ 0

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Loans and Allowance for Loan Losses - Purchased Credit-Impaired (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
PCI Loans, Carrying Value [Abstract]
Unpaid Principal Balance	$ 2,665		$ 2,665		$ 2,868
Carrying Value	2,140		2,140		2,115
Accretable Yield [Roll Forward]
Balance at beginning of period	1,142	$ 1,386	1,254	$ 1,476
Accretion	(83)	(80)	(195)	(170)
Balance at end of period	1,059	$ 1,306	1,059	$ 1,306
Commercial loans | Commercial and industrial
PCI Loans, Carrying Value [Abstract]
Unpaid Principal Balance	125		125		276
Carrying Value	42		42		65
Commercial real estate loans | Commercial real estate, owner-occupied
PCI Loans, Carrying Value [Abstract]
Unpaid Principal Balance	1,271		1,271		1,297
Carrying Value	1,209		1,209		1,166
Commercial real estate loans | Commercial real estate, investor
PCI Loans, Carrying Value [Abstract]
Unpaid Principal Balance	1,049		1,049		1,064
Carrying Value	801		801		790
Residential loans | Home equity
PCI Loans, Carrying Value [Abstract]
Unpaid Principal Balance	220		220		231
Carrying Value	$ 88		$ 88		$ 94

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Loans and Allowance for Loan Losses - Pledged Loans (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Financial Instruments Owned and Pledged as Collateral [Line Items]
Residential loans pledged for FRB borrowings	$ 996.9	$ 887.9
Other residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged residential loan portfolio to secure borrowing with FRB	$ 80.0	$ 67.6

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Loans and Allowance for Loan Losses - Related Party (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related party loans	$ 12.3	$ 11.9
Directors, Officers, Principal Shareholders and Associates
Related Party Transaction [Line Items]
Undisbursed commitment to related parties	$ 8.6	$ 9.1

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Borrowings - Lines of Credit (Details) - Line of credit - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Federal Funds Purchased
Line of Credit Facility [Line Items]
Amount of borrowings outstanding	$ 0	$ 0
Federal Home Loan Bank Borrowings
Line of Credit Facility [Line Items]
Lines of credit	627,400,000	538,900,000
Federal Home Loan Bank Overnight Borrowings
Line of Credit Facility [Line Items]
Amount of borrowings outstanding	0	0
Federal Reserve Line of Credit
Line of Credit Facility [Line Items]
Lines of credit	59,500,000	52,100,000
Amount of borrowings outstanding	0	52,100.0
Unsecured Debt | Federal Funds Purchased
Line of Credit Facility [Line Items]
Lines of credit	$ 92,000,000	$ 100,400,000

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Borrowings - Subordinated Debt (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) debenture	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Accretion of discount on subordinated debentures	$ 63	$ 80
Amount guaranteed, on subordinated basis, distributions and other payments on trust preferred securities	$ 8,000
Subordinated debenture
Debt Instrument [Line Items]
Number of subordinated debentures acquired | debenture	2
Subordinated debentures	$ 4,950
Contractual value of subordinated debt	8,248
Accretion of discount on subordinated debentures	$ 63	$ 80
Debenture distribution deferral period (up to number of years)	5 years
Subordinated debenture | NorCal Community Bancorp Trust I
Debt Instrument [Line Items]
Contractual value of subordinated debt	$ 4,124
Effective interest rate	5.40%
Subordinated debenture | NorCal Community Bancorp Trust II
Debt Instrument [Line Items]
Contractual value of subordinated debt	$ 4,124
Effective interest rate	3.74%
LIBOR | Subordinated debenture | NorCal Community Bancorp Trust I
Debt Instrument [Line Items]
Basis spread on subordinated debentures	3.05%
LIBOR | Subordinated debenture | NorCal Community Bancorp Trust II
Debt Instrument [Line Items]
Basis spread on subordinated debentures	1.40%

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Stockholders' Equity (Details) - USD ($)		3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 20, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Apr. 20, 2018
Class of Stock [Line Items]
Cash dividends to common stockholders		$ 2,166,000		$ 1,660,000	$ 4,181,000	$ 3,315,000	$ 6,896,000
Cash dividends per common share (usd per share)		$ 0.31		$ 0.27	$ 0.60	$ 0.54
Shares withheld for tax withholding and exercise of options					19,863	5,651
Amount of shares withheld for tax withholding and exercise of options					$ 1,400,000	$ 385,000
Shares withheld for tax withholding and exercise of options, weighted average price (usd per share)					$ 70.34	$ 68.04
Reclassification from AOCI to retained earnings for stranded income tax effects					$ 0
Share Repurchase Program, amount approved to repurchase								$ 25,000,000.0
Stock repurchased, net of commissions		$ 104,000			$ 104,000
Performance-based stock awards
Class of Stock [Line Items]
Vesting period of performance-based stock awards					3 years
Performance-based stock awards | Minimum
Class of Stock [Line Items]
Vesting percentage of performance-based awards					0.00%
Performance-based stock awards | Maximum
Class of Stock [Line Items]
Vesting percentage of performance-based awards					200.00%
Retained Earnings
Class of Stock [Line Items]
Cash dividends to common stockholders					$ 4,181,000		$ 6,896,000
Reclassification from AOCI to retained earnings for stranded income tax effects			$ 638,000		$ 638,000
Common Stock
Class of Stock [Line Items]
Stock repurchased, net of commissions (in shares)		1,398			1,398
Stock repurchased, net of commissions					$ 104,000
Subsequent Event
Class of Stock [Line Items]
Dividends declared per common share (usd per share)	$ 0.32

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Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2012	Dec. 31, 2017
Operating Leases
2018		$ 2,209		$ 2,209
2019		4,198		4,198
2020		3,758		3,758
2021		2,138		2,138
2022		1,330		1,330
Thereafter		2,904		2,904
Total		16,500		16,500
Rent expense		1,200	$ 1,000	2,300	$ 2,000
Visa Inc.
Litigation Matters
Settlement agreement amount						$ 4,000,000
Litigation provision		600,000
Litigation escrow deposit	$ 600,000
Balance of escrow account for legal settlements		1,500,000		1,500,000
Visa Inc. | Pending due to reversal
Litigation Matters
Settlements reached by percentage of sales volume of merchants who opted out in Visa litigation, percent							51.00%
Loan commitments and standby letters of credit, unused
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		458,150		458,150			$ 453,202
Loan commitments and standby letters of credit, unused | Interest payable and other liabilities
Loss Contingencies [Line Items]
Allowance for off balance sheet commitments		958		958			958
Commercial lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		222,547		222,547			224,370
Revolving home equity lines
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		186,652		186,652			177,678
Undisbursed construction loans
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		34,336		34,336			35,322
Personal and other lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		12,408		12,408			11,758
Standby letters of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		$ 2,207		$ 2,207			$ 4,074

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Derivative Financial Instruments and Hedging Activities - Information on Derivatives (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) derivative	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) derivative	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Derivatives, Fair Value [Line Items]
Carrying Amounts of Hedged Assets	$ 18,112		$ 18,112
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans	(262)		(262)
Fair value hedge | Interest income
Derivatives, Fair Value [Line Items]
Increase (decrease) in value of designated interest rate swaps	187	$ (129)	716	$ (18)
Payment on interest rate swaps	(40)	(87)	(95)	(185)
(Decrease) increase in value of hedged loans	(116)	191	(693)	78
Decrease in value of yield maintenance agreement	(3)	(4)	(7)	(7)
Net loss on derivatives recognized against interest income	28	$ (29)	(79)	$ (132)
Fair value hedge | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Accrued interest on swaps	$ 5		$ 5		$ 8
Fair value hedge | Designated as hedging instrument | Interest rate swap
Derivatives, Fair Value [Line Items]
Number of derivative instruments | derivative	5		5
Fair value hedge | Designated as hedging instrument | Interest rate swap | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Asset derivatives	$ 9,081		$ 9,081		4,019
Fair value hedge | Designated as hedging instrument | Interest rate swap | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Liability derivatives	9,293		9,293		14,810
Fair value hedge | Designated as hedging instrument | Interest rate contract | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Asset derivatives	327		327		74
Fair value hedge | Designated as hedging instrument | Interest rate contract | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Liability derivatives	$ 276		$ 276		$ 740

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Derivative Financial Instruments and Hedging Activities - Offsetting of Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Interest rate swap | Other assets
Offsetting Assets [Line Items]
Accrued interest on derivative asset interest rate swaps	$ 1	$ 1
Counterparty A
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	327	74
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	327	74
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	(276)	(74)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	$ 51	$ 0

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Derivative Financial Instruments and Hedging Activities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Interest rate swap | Other liabilities
Offsetting Liabilities [Line Items]
Accrued interest on derivative liability interest swaps	$ 4	$ 8
Counterparty A
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	276	740
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	276	740
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	(276)	(74)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged		(666)
Net Amount	$ 0	$ 0

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Acquisition - Narrative (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Nov. 21, 2017 USD ($) branch
Business Acquisition [Line Items]
Goodwill	$ 30,140,000		$ 30,140,000
Amortization of core deposit intangible	460,000	$ 236,000
Bank of Napa, N.A. (Napa)
Business Acquisition [Line Items]
Number of branch offices | branch				2
Loans acquired				$ 134,700,000
Deposits assumed				249,900,000
Investment securities acquired				$ 75,500,000
Shares received by Napa shareholders in acquisition per acquiree share				0.307
Goodwill				$ 23,700,000
Goodwill impairment	0
Core deposits | Bank of Napa, N.A. (Napa)
Business Acquisition [Line Items]
Core deposit intangible asset				$ 4,400,000
Amortization of core deposit intangible	$ 254,000		$ 56,000
Useful life of core deposit intangible asset	10 years

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Acquisition - Acquisition Related Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Data processing	$ 1,023	$ 963	$ 2,404	$ 1,902
Professional services	810	522	2,109	1,044
Other	1,665	$ 1,652	3,361	$ 3,245
Bank of Napa, N.A. (Napa)
Business Acquisition [Line Items]
Data processing	163		555
Professional services	31		126
Personnel severance	35		141
Other	21		43
Total	$ 250		$ 865