Bank of Marin Bancorp (BMRC) 10-Q 7 Nov 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	Bank of Marin Bancorp
Entity Central Index Key	1,403,475
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		6,123,181

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 96,930	$ 26,343
Investment securities
Held-to-maturity, at amortized cost	46,423	69,637
Available-for-sale, at fair value	378,996	417,787
Total investment securities	425,419	487,424
Loans, net of allowance for loan losses of $15,713 and $14,999 at September 30, 2016 and December 31, 2015, respectively	1,451,950	1,436,229
Bank premises and equipment, net	8,611	9,305
Goodwill	6,436	6,436
Core deposit intangible	2,713	3,113
Interest receivable and other assets	62,762	62,284
Total assets	2,054,821	2,031,134
Deposits
Non-interest bearing	860,638	770,087
Interest bearing
Transaction accounts	91,979	114,277
Savings accounts	156,225	141,316
Money market accounts	533,682	541,089
Time accounts	158,945	161,457
Total deposits	1,801,469	1,728,226
Federal Home Loan Bank (FHLB) and other borrowings	0	67,000
Subordinated debentures	5,540	5,395
Interest payable and other liabilities	16,032	16,040
Total liabilities	1,823,041	1,816,661
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 - 6,123,181 and 6,068,543 at September 30, 2016 and December 31, 2015, respectively	86,926	84,727
Retained earnings	142,427	129,553
Accumulated other comprehensive income, net	2,427	193
Total stockholders' equity	231,780	214,473
Total liabilities and stockholders' equity	$ 2,054,821	$ 2,031,134

CONSOLIDATED STATEMENTS OF CON3

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans and Leases Receivable, Net Amount
Loans, allowance for loan losses	$ 15,713	$ 14,999
Stockholders' Equity
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	15,000,000	15,000,000
Common stock, issued (in shares)	6,123,181	6,068,543
Common stock, outstanding (in shares)	6,123,181	6,068,543

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income
Interest and fees on loans	$ 17,840	$ 15,498	$ 51,078	$ 46,164
Interest on investment securities
Securities of U.S. government agencies	1,283	1,223	3,826	3,248
Obligations of state and political subdivisions	569	527	1,743	1,578
Corporate debt securities and other	38	162	220	546
Interest on Federal funds sold and short-term investments	104	35	155	107
Total interest income	19,834	17,445	57,022	51,643
Interest expense
Interest on interest-bearing transaction accounts	27	28	82	88
Interest on savings accounts	15	12	43	37
Interest on money market accounts	112	125	330	375
Interest on time accounts	190	212	579	649
Interest on FHLB and other borrowings	0	80	478	236
Interest on subordinated debentures	109	105	325	314
Total interest expense	453	562	1,837	1,699
Net interest income	19,381	16,883	55,185	49,944
(Reversal of) provision for loan losses	(1,550)	0	(1,550)	0
Net interest income after provision for loan losses	20,931	16,883	56,735	49,944
Non-interest income
Service charges on deposit accounts	447	489	1,344	1,518
Wealth Management and Trust Services	506	568	1,599	1,809
Debit card interchange fees	393	372	1,112	1,087
Merchant interchange fees	114	171	355	430
Earnings on bank-owned life insurance	216	204	626	610
Dividends on FHLB stock	223	209	577	817
Gains on investment securities, net	0	72	394	80
Other income	215	213	691	744
Total non-interest income	2,114	2,298	6,698	7,095
Non-interest expense
Salaries and related benefits	6,683	6,300	20,155	19,762
Occupancy and equipment	1,275	1,346	3,731	4,181
Depreciation and amortization	449	441	1,343	1,512
Federal Deposit Insurance Corporation insurance	253	250	760	739
Data processing	894	835	2,666	2,413
Professional services	476	493	1,528	1,572
Directors' expense	143	182	448	620
Information technology	307	186	665	554
Reversal of losses on off-balance sheet commitments	0	324	150	14
Other expense	1,430	1,281	4,491	4,447
Total non-interest expense	11,910	11,638	35,937	35,814
Income before provision for income taxes	11,135	7,543	27,496	21,225
Provision for income taxes	4,171	2,770	10,049	7,709
Net income	$ 6,964	$ 4,773	$ 17,447	$ 13,516
Net income per common share:
Basic (usd per share)	$ 1.14	$ 0.80	$ 2.87	$ 2.27
Diluted (usd per share)	$ 1.14	$ 0.79	$ 2.86	$ 2.23
Weighted average shares:
Basic (shares)	6,083	5,963	6,070	5,943
Diluted (shares)	6,117	6,067	6,106	6,059
Dividends declared per common share	$ 0.25	$ 0.22	$ 0.75	$ 0.66
Comprehensive income:
Net income	$ 6,964	$ 4,773	$ 17,447	$ 13,516
Other comprehensive income
Change in net unrealized (loss) gain on available-for-sale securities	(831)	1,523	4,211	1,037
Reclassification adjustment for gains on available-for-sale securities included in net income	0	0	(394)	(8)
Net change in unrealized (loss) gain on available-for-sale securities, before tax	(831)	1,523	3,817	1,029
Deferred tax (benefit) expense	(367)	654	1,583	517
Other comprehensive (loss) income, net of tax	(464)	869	2,234	512
Comprehensive income	$ 6,500	$ 5,642	$ 19,681	$ 14,028

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss), Net of Taxes
Balance (in shares) at Dec. 31, 2014		5,939,482
Balance at Dec. 31, 2014	$ 200,026	$ 82,436	$ 116,502	$ 1,088
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,441		18,441
Other comprehensive income (loss)	(895)			(895)
Stock options exercised (in shares)		37,071
Stock options exercised	1,139	$ 1,139
Excess tax benefit - stock-based compensation	212	$ 212
Stock issued under employee stock purchase plan (in shares)		339
Stock issued under employee stock purchase plan	17	$ 17
Restricted stock granted (in shares)		15,970
Restricted stock granted	0	$ 0
Restricted stock forfeited/cancelled (in shares)		(450)
Restricted stock forfeited/cancelled	0	$ 0
Stock-based compensation - stock options	252	252
Stock-based compensation - restricted stock	384	$ 384
Cash dividends paid on common stock	(5,390)		(5,390)
Stock purchased by directors under director stock plan (in shares)		245
Stock purchased by directors under director stock plan	12	$ 12
Stock issued in payment of director fees (in shares)		5,295
Stock issued in payment of director fees	275	$ 275
Stock issued from exercise of warrants (in shares)		70,591
Stock issued from exercise of warrants	$ 0	$ 0
Balance (in shares) at Dec. 31, 2015	6,068,543	6,068,543
Balance at Dec. 31, 2015	$ 214,473	$ 84,727	129,553	193
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,447		17,447
Other comprehensive income (loss)	2,234			2,234
Stock options exercised (in shares)		32,117
Stock options exercised	1,087	$ 1,087
Excess tax benefit - stock-based compensation	119	$ 119
Stock issued under employee stock purchase plan (in shares)		488
Stock issued under employee stock purchase plan	23	$ 23
Restricted stock granted (in shares)		16,910
Restricted stock granted	0	$ 0
Stock-based compensation - stock options	266	266
Stock-based compensation - restricted stock	444	$ 444
Cash dividends paid on common stock	(4,573)		(4,573)
Stock purchased by directors under director stock plan (in shares)		516
Stock purchased by directors under director stock plan	26	$ 26
Stock issued in payment of director fees (in shares)		4,607
Stock issued in payment of director fees	$ 234	$ 234
Balance (in shares) at Sep. 30, 2016	6,123,181	6,123,181
Balance at Sep. 30, 2016	$ 231,780	$ 86,926	$ 142,427	$ 2,427

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Cash Flows from Operating Activities:
Net income	$ 6,964	$ 4,773	$ 17,447	$ 13,516	$ 18,441
Adjustments to reconcile net income to net cash provided by operating activities:
(Reversal of) provision for loan losses	(1,550)	0	(1,550)	0
Provision for losses on off-balance sheet commitments	0	324	150	14
Compensation expense via common stock for director fees			146	207
Stock-based compensation expense			710	477
Excess tax benefits from exercised or vested stock-based awards			(119)	(150)
Amortization of core deposit intangible			400	464
Amortization of investment security premiums, net of accretion of discounts			2,293	2,038
Accretion of discount on acquired loans			(1,526)	(1,569)
Accretion of discount on subordinated debentures			145	158
Net amortization of deferred loan origination costs/fees			100	(374)
Write-down of other real estate owned			13	40
Gain on sale of investment securities			(394)	(80)
Depreciation and amortization	449	441	1,343	1,512
Loss on disposal of premises and equipment			3	4
Earnings on bank-owned life insurance policies	(216)	(204)	(626)	(610)
Net change in operating assets and liabilities:
Interest receivable			998	303
Interest payable			(49)	(13)
Deferred rent and other rent-related expenses			(287)	42
Other assets			1,364	1,930
Other liabilities			(246)	(819)
Total adjustments			2,868	3,574
Net cash provided by operating activities			20,315	17,090
Cash Flows from Investing Activities:
Purchase of held-to-maturity securities			(2,424)	(2,375)
Purchase of available-for-sale securities			(138,432)	(189,755)
Proceeds from sale of available-for-sale securities	0	0	68,673	1,559
Proceeds from sale of held-to-maturity securities	0	1,015	0	1,015
Purchase of bank-owned life insurance policies			(2,133)	0
Proceeds from paydowns/maturity of held-to-maturity securities			25,150	30,529
Proceeds from paydowns/maturity of available-for-sale securities			110,978	54,966
Proceeds from the sale of loan			0	1,502
Loans originated and principal collected, net			(11,723)	403
Purchase of FHLB stock			(1,792)	(136)
Purchase of premises and equipment			(652)	(1,194)
Cash paid for low income housing tax credit investment			(298)	(645)
Net cash provided by (used in) investing activities			47,347	(104,131)
Cash Flows from Financing Activities:
Net increase in deposits			73,243	83,863
Proceeds from stock options exercised			1,087	888
Proceeds from stock issued under employee and director stock purchase plans			49	24
Repayment of Federal Home Loan Bank borrowings			(67,000)	0
Cash dividends paid on common stock			(4,573)	(3,936)
Excess tax benefits from exercised or vested stock-based awards			119	150
Net cash provided by financing activities			2,925	80,989
Net increase (decrease) in cash and cash equivalents			70,587	(6,052)
Cash and cash equivalents at beginning of period			26,343	41,367	41,367
Cash and cash equivalents at end of period	$ 96,930	$ 35,315	96,930	35,315	$ 26,343
Supplemental disclosure of cash flow information:
Cash paid for interest			1,741	1,554
Cash paid for income taxes			9,095	6,603
Supplemental disclosure of non-cash investing and financing activities:
Change in unrealized gain on available-for-sale securities			3,817	(1,029)
Transfer of loan to loans held-for-sale at fair value			0	1,502
Subscription in low income housing tax credit investment			0	1,023
Stock issued in payment of director fees			$ 234	$ 275

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2016
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 the holding company 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 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 2015 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. We have evaluated subsequent events through the date of filing with the SEC and have determined that there are no subsequent events that require additional recognition or disclosure. 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's investment in the securities of the Trusts is accounted for under the equity method and is included in interest receivable and other assets on 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, unvested restricted stock awards and stock warrant, 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, which is based on average market prices during the three months of 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. We have two forms of our 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. Therefore, under the two-class method, the difference in EPS is not significant for these participating securities. Three months ended Nine months ended (in thousands, except per share data) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Weighted average basic shares outstanding 6,083 5,963 6,070 5,943 Potentially dilutive common shares related to: Stock options 27 35 30 41 Unvested restricted stock awards 7 5 6 5 Warrant — 64 — 70 Weighted average diluted shares outstanding 6,117 6,067 6,106 6,059 Net income $ 6,964 $ 4,773 $ 17,447 $ 13,516 Basic EPS $ 1.14 $ 0.80 $ 2.87 $ 2.27 Diluted EPS $ 1.14 $ 0.79 $ 2.86 $ 2.23 Weighted average anti-dilutive shares not included in the calculation of diluted EPS 71 42 65 35

Recently Issued Accounting Stan

Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Standards	Recently 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). This ASU is a converged standard involving FASB and International Financial Reporting Standards that provides a single comprehensive revenue recognition model for all contracts with customers across transactions and industries. The core principal of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount and at a time that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Subsequent updates related to Revenue from Contracts with Customers (Topic 606) are as follows: • August 2015 ASU No. 2015-14 - Deferral of the Effective Date , institutes a one-year deferral of the effective date of this amendment to annual reporting periods beginning after December 15, 2017. Early application is permitted only as of annual periods beginning after December 15, 2016, including interim reporting periods within that reporting period. • March 2016 ASU No. 2016-08 - Principal versus Agent Considerations (Reporting Revenue Gross versus Net), clarifies the implementation guidance on principal versus agent considerations and on the use of indicators that assist an entity in determining whether it controls a specified good or service before it is transferred to the customer. • April 2016 ASU No. 2016-10 - Identifying Performance Obligations and Licensing, provides guidance in determining performance obligations in a contract with a customer and clarifies whether a promise to grant a license provides a right to access or the right to use intellectual property. • May 2016 ASU No. 2016-12 - Narrow Scope Improvements and Practical Expedients , gives further guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. We are currently evaluating the provisions of these updates and will be monitoring developments and additional guidance to determine the potential impact the new standards will have on our financial condition and results of operations. 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 GAAP related to financial instruments that include the following as applicable to us. • Equity investments, except for those accounted for under the equity method of accounting or those that result in consolidation of the investee, are required 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 - if impairment exists, this requires measuring the investment at fair value. • Eliminates the requirement for public companies to disclose the method(s) and significant assumptions used to estimate the fair value that is currently required to be disclosed for financial instruments measured at amortized cost on the balance sheet. • Public companies will be required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. • The reporting 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. ASU 2016-01 is effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. This ASU will impact our financial statement disclosures, however, we do not expect it to have a material impact on our financial condition or results of operations. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . This ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities, including leases classified as operating leases under previous GAAP, on the balance sheet and requiring additional disclosures of key information about leasing arrangements. This ASU 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 upon adoption. Early application of the amendments is permitted. We are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the timing of our adoption and the potential outcome the amendments will have on our financial condition and results of operations. In March 2016, the FASB issued ASU No. 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships . A contract novation refers to replacing one of the parties to a derivative instrument with a new party. This ASU clarifies that a change in counterparty in a derivative instrument does not, in and of itself, require dedesignation of that hedging relationship and therefore discontinue the application of hedge accounting. ASU 2016-05 is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted in any interim or annual period. We do not expect this ASU to have a material impact on our financial condition or results of operations. In March 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . This ASU identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, forfeiture accounting, and classifications on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. We are currently evaluating the the provisions of this ASU and will be monitoring developments and additional guidance to determine the potential outcome the amendments will have on 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 . This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses, requiring a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses, which is likely to result in more timely recognition of such losses. In addition, the accounting for purchased credit impaired financial assets will make the allowance for credit losses more comparable between originated assets and purchased financial assets, as well as reduce complexity with the accounting for interest income. 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 are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the timing of our adoption and the potential outcome the amendments will have on our financial condition and results of operations. 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 issues 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 do not expect this ASU to have a material impact on our financial condition or results of operations.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2016
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 into 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) September 30, 2016 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 252,824 $ — $ 252,199 $ 625 Debentures of government-sponsored agencies 40,576 — 40,576 — Privately-issued collateralized mortgage obligations 560 — 560 — Obligations of state and political subdivisions 80,027 — 80,027 — Corporate bonds 5,009 — 5,009 — Derivative financial liabilities (interest rate contracts) 2,480 — 2,480 — December 31, 2015 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 190,093 $ — $ 188,381 $ 1,712 Debentures of government-sponsored agencies 160,892 — 160,892 — Privately-issued collateralized mortgage obligations 4,150 — 4,150 — Obligations of state and political subdivisions 57,673 — 57,673 — Corporate bonds 4,979 — 4,979 — Derivative financial assets (interest rate contracts) 3 — 3 — Derivative financial liabilities (interest rate contracts) 1,658 — 1,658 — 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 and privately-issued collateralized mortgage obligations. As of September 30, 2016 and December 31, 2015 , there were no securities that were considered Level 1 securities. As of September 30, 2016 , we had one available-for-sale security that was considered a Level 3 security. The security is a U.S. government agency obligation collateralized by a small number of business equipment loans guaranteed by the Small Business Administration ("SBA") program. This security is not actively traded and is owned only by a few investors. The significant unobservable data that is reflected in the fair value measurement include dealer quotes, projected prepayment speeds/average life and credit information, among other things. The decrease in fair value during 2016 was due to the pay-off of one of the larger loans in the pool collateralizing the security. The unrealized gain or loss on this SBA-guaranteed security decreased by $15 thousand in the same period recorded as part of other comprehensive income. 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 an other-than-temporary impairment, if any. 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 Bank of Marin. For further discussion on our methodology in valuing our derivative financial instruments, refer to Note 9. 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 and other real estate owned ("OREO"). The following table presents the carrying value of assets and liabilities measured at fair value on a non-recurring basis and that were held in the consolidated statements of condition at each respective period end, by level within the fair value hierarchy as of September 30, 2016 and December 31, 2015 . (in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2016 Impaired loans 1 $ 124 $ — $ — $ 124 Other real estate owned 408 — — 408 December 31, 2015 Impaired loans $ — $ — $ — $ — Other real estate owned 421 — — 421 1 Represents collateral-dependent loan principal balances that had been generally written down to the values of the underlying collateral and reflected net of specific valuation allowances. At September 30, 2016 , the $124 thousand carrying value of a consumer loan was net of a $52 thousand specific valuation allowance. The carrying value of loans fully charged-off, which includes unsecured lines of credit, overdrafts and all other loans, is zero. When a loan is identified as impaired, it is reported at the lower of cost or fair value, measured based on the loan's observable market price (Level 1) or the current net realizable value of the underlying collateral securing the loan, if the loan is collateral dependent (Level 3). Net realizable value of the underlying collateral is the fair value of the collateral less estimated selling costs and any prior liens. Appraisals, recent comparable sales, offers and listing prices are factored in when valuing the collateral. We review and verify the qualifications and licenses of the certified general appraisers used for appraising commercial properties or certified residential appraisers for residential properties. Real estate appraisals may utilize a combination of approaches including replacement cost, sales comparison and the income approach. Comparable sales and income data are analyzed by the appraisers and adjusted to reflect differences between them and the subject property such as property characteristics, leasing status and physical condition. When appraisals are received, Management reviews the underlying assumptions and methodology utilized, as well as the overall resulting value in conjunction with independent data sources such as recent market data and industry-wide statistics. We generally use a 6% discount for selling costs which is applied to all properties, regardless of size. Appraised values may be adjusted to reflect changes in market conditions that have occurred subsequent to the appraisal date, or for revised estimates regarding the timing or cost of the property sale. These adjustments are based on qualitative judgments made by Management on a case-by-case basis and are generally unobservable valuation inputs as they are specific to the underlying collateral. There have been no significant changes in the valuation techniques during 2016. OREO represents collateral acquired through foreclosure and is initially recorded at fair value as established by a current appraisal, adjusted for disposition costs. Subsequently, OREO is measured at lower of cost or fair value. OREO values are reviewed on an ongoing basis and any subsequent decline in fair value is recorded as a foreclosed asset expense in the current period. The value of OREO is determined based on independent appraisals, similar to the process used for impaired loans, discussed above, and is classified as Level 3. All OREO resulted from an acquisition. Decreases in the estimated fair value of OREO totaled $13 thousand and $40 thousand during the first nine months of 2016 and 2015, respectively. Disclosures about Fair Value of Financial Instruments The table below is a summary of fair value estimates for financial instruments as of September 30, 2016 and December 31, 2015 , 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. We have excluded non-financial assets and non-financial liabilities defined by the Codification (ASC 820-10-15-1A), such as Bank premises and equipment, deferred taxes and other liabilities. In addition, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements of the Financial Instruments Topic of the Codification (ASC 825-10-50-8), such as bank-owned life insurance policies ("BOLI"). September 30, 2016 December 31, 2015 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets Cash and cash equivalents $ 96,930 $ 96,930 Level 1 $ 26,343 $ 26,343 Level 1 Investment securities held-to-maturity 46,423 47,867 Level 2 69,637 71,054 Level 2 Loans, net 1,451,950 1,471,861 Level 3 1,436,229 1,470,380 Level 3 Interest receivable 5,645 5,645 Level 2 6,643 6,643 Level 2 Financial liabilities Deposits 1,801,469 1,801,932 Level 2 1,728,226 1,728,717 Level 2 Federal Home Loan Bank and other borrowings — — Level 2 67,000 67,279 Level 2 Subordinated debentures 5,540 5,156 Level 3 5,395 5,132 Level 3 Interest payable 138 138 Level 2 187 187 Level 2 Following is a description of methods and assumptions used to estimate the fair value of each class of financial instrument not recorded at fair value but required for disclosure purposes: Cash and Cash Equivalents - The carrying amounts of cash and cash equivalents approximate their fair value because of the short-term nature of these instruments. Held-to-maturity Securities - Held-to-maturity securities, which generally consist of obligations of state and political subdivisions and corporate bonds, are recorded at their amortized cost. The fair value for disclosure purposes is determined using methodologies similar to those described above for available-for-sale securities using Level 2 inputs. If Level 2 inputs are not available, we may utilize pricing models that incorporate unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities (Level 3). As of September 30, 2016 and December 31, 2015 , we did not hold any held-to-maturity securities whose fair value was measured using significant unobservable inputs. Loans - The fair value of loans with variable interest rates approximates their current carrying value, because their rates are regularly adjusted to current market rates. The fair value of fixed rate loans or variable loans at negotiated interest rate floors or ceilings with remaining maturities in excess of one year is estimated by discounting the future cash flows using current market rates at which similar loans would be made to borrowers with similar creditworthiness and similar remaining maturities. The allowance for loan losses (“ALLL”) is considered to be a reasonable estimate of the portion of loan discount attributable to credit risks. Interest Receivable and Payable - The interest receivable and payable balances approximate their fair value due to the short-term nature of their settlement dates. Deposits - The fair value of deposits without stated maturity, such as transaction accounts, savings accounts and money market accounts, is the amount payable on demand at the reporting date. The fair value of time deposits is estimated by discounting the future cash flows using current rates offered for deposits of similar remaining maturities. Federal Home Loan Bank Borrowings - The fair value is estimated by discounting the future cash flows using current rates offered by the Federal Home Loan Bank of San Francisco ("FHLB") for similar credit advances corresponding to the remaining term of our fixed-rate credit advances. Subordinated Debentures - The fair values of the subordinated debentures were estimated by discounting the future cash flows (interest payment at a rate of three-month LIBOR plus 3.05% and 1.40% ) to their present values using current market rates at which similar bonds would be issued with similar credit ratings as ours and similar remaining maturities. Each interest payment was discounted at the spot rate for the corresponding term, determined based on the yields and terms of comparable trust preferred securities, plus a liquidity premium. In July 2010, the Dodd-Frank Act was signed into law and limits the ability of certain bank holding companies to treat trust preferred security debt issuances as Tier 1 capital. This law effectively closed the trust-preferred securities markets for new issuances and led to the absence of observable or comparable transactions in the market place. Due to the use of unobservable inputs of trust preferred securities, we consider the fair value to be a Level 3 measurement. See Note 6 for further information. 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 September 30, 2016 and December 31, 2015 , respectively.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2016
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 mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, as well as privately issued CMOs, as reflected in the table below: September 30, 2016 December 31, 2015 Amortized Fair Gross Unrealized Amortized Fair Gross Unrealized (in thousands) Cost Value Gains (Losses) Cost Value Gains (Losses) Held-to-maturity: Obligations of state and political subdivisions $ 32,765 $ 33,868 $ 1,106 $ (3 ) $ 42,919 $ 44,146 $ 1,246 $ (19 ) Corporate bonds 3,524 3,523 0 (1 ) 15,072 15,098 42 (16 ) MBS pass-through securities issued by FHLMC and FNMA 10,134 10,476 342 — 11,646 11,810 171 (7 ) Total held-to-maturity 46,423 47,867 1,448 (4 ) 69,637 71,054 1,459 (42 ) Available-for-sale: Securities of U.S. government or government-sponsored agencies: MBS pass-through securities issued by FHLMC and FNMA 196,987 198,999 2,239 (227 ) 138,222 138,462 694 (454 ) CMOs issued by FNMA 14,885 15,104 219 — 18,266 18,219 97 (144 ) CMOs issued by FHLMC 30,555 30,887 332 — 22,889 22,932 82 (39 ) CMOs issued by GNMA 7,654 7,834 180 — 10,326 10,480 169 (15 ) Debentures of government- sponsored agencies 40,486 40,576 98 (8 ) 161,690 160,892 28 (826 ) Privately issued CMOs 560 560 1 (1 ) 3,960 4,150 190 — Obligations of state and political subdivisions 78,719 80,027 1,401 (93 ) 57,110 57,673 580 (17 ) Corporate bonds 4,956 5,009 53 — 4,947 4,979 43 (11 ) Total available-for-sale 374,802 378,996 4,523 (329 ) 417,410 417,787 1,883 (1,506 ) Total investment securities $ 421,225 $ 426,863 $ 5,971 $ (333 ) $ 487,047 $ 488,841 $ 3,342 $ (1,548 ) The amortized cost and fair value of investment debt securities by contractual maturity at September 30, 2016 are shown below. Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2016 December 31, 2015 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 $ 14,037 $ 14,115 $ 17,067 $ 17,080 $ 18,853 $ 18,920 $ 12,135 $ 12,176 After one year but within five years 16,583 17,212 67,087 67,487 31,677 32,360 188,007 187,326 After five years through ten years 4,467 4,739 87,774 88,871 8,580 8,969 64,899 64,999 After ten years 11,336 11,801 202,873 205,558 10,527 10,805 152,369 153,286 Total $ 46,423 $ 47,867 $ 374,801 $ 378,996 $ 69,637 $ 71,054 $ 417,410 $ 417,787 Sales of investment securities and gross realized gains and losses are shown in the following table. Three months ended Nine months ended (in thousands) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Available-for-sale: Sales proceeds $ — $ — $ 68,673 $ 1,559 Gross realized gains — — 458 8 Gross realized losses — — (64 ) — Held-to-Maturity: Sales proceeds $ — $ 1,015 $ — $ 1,015 Gross realized gains — 72 — 72 Gross realized losses — — — — Investment securities carried at $70.7 million and $87.9 million at September 30, 2016 and December 31, 2015 , respectively, were pledged to the State of California: $69.9 million and $87.1 million to secure public deposits in compliance with the Local Agency Security Program at September 30, 2016 and December 31, 2015 , respectively, and $827 thousand and $840 thousand to provide collateral for trust deposits at September 30, 2016 and December 31, 2015 , respectively. In addition, investment securities carried at $2.1 million and $1.1 million were pledged to collateralize a Wealth Management and Trust Services (“WMTS”) checking account at September 30, 2016 and December 31, 2015 , respectively. Other-Than-Temporarily Impaired 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 securities in our investment portfolio is other-than-temporarily impaired as of September 30, 2016 . We do not have the intent and it is more likely than not that we will not have to sell securities temporarily impaired at September 30, 2016 before recovery of the cost basis. Thirty-seven and fifty-four investment securities were in unrealized loss positions at September 30, 2016 and December 31, 2015 , respectively. Those securities are summarized and classified according to the duration of the loss period in the tables below: September 30, 2016 < 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 $ 547 $ (3 ) $ — $ — $ 547 $ (3 ) Corporate bonds 3,523 (1 ) — — 3,523 (1 ) Total held-to-maturity 4,070 (4 ) — — 4,070 (4 ) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 69,229 (227 ) — — 69,229 (227 ) Debentures of government- sponsored agencies 14,992 (8 ) — — 14,992 (8 ) Privately issued CMOs 162 (1 ) — — 162 (1 ) Obligations of state & political subdivisions 14,236 (93 ) — — 14,236 (93 ) Total available-for-sale 98,619 (329 ) — — 98,619 (329 ) Total temporarily impaired securities $ 102,689 $ (333 ) $ — $ — $ 102,689 $ (333 ) December 31, 2015 < 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 $ 8,297 $ (19 ) $ — $ — $ 8,297 $ (19 ) Corporate bonds 3,523 (15 ) 1,999 (1 ) 5,522 (16 ) MBS pass-through securities issued by FHLMC and FNMA 2,332 (7 ) — — 2,332 (7 ) Total held-to-maturity 14,152 (41 ) 1,999 (1 ) 16,151 (42 ) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 68,809 (454 ) — — 68,809 (454 ) CMOs issued by FNMA 9,277 (80 ) 3,158 (64 ) 12,435 (144 ) CMOs issued by FHLMC — — 1,989 (39 ) 1,989 (39 ) CMOs issued by GNMA 164 — 2,374 (15 ) 2,538 (15 ) Debentures of government- sponsored agencies 136,064 (713 ) 9,887 (113 ) 145,951 (826 ) Obligations of state & political subdivisions 4,557 (15 ) 579 (2 ) 5,136 (17 ) Corporate bonds 2,986 (11 ) — — 2,986 (11 ) Total available-for-sale 221,857 (1,273 ) 17,987 (233 ) 239,844 (1,506 ) Total temporarily impaired securities $ 236,009 $ (1,314 ) $ 19,986 $ (234 ) $ 255,995 $ (1,548 ) The thirty-seven investment securities in our portfolio in a temporary loss position for less than twelve months as of September 30, 2016 consisted of two debentures of U.S. government-sponsored agencies, twenty-three obligations of U.S. state and political subdivisions, ten MBS securities issued by government-sponsored agencies, one privately issued CMO and one corporate bond. The debentures 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 have concluded that these securities were not other-than-temporarily impaired at September 30, 2016 . 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 $10.2 million and $8.4 million of FHLB stock recorded at cost in other assets on the consolidated statements of condition at September 30, 2016 and December 31, 2015 , respectively. 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, as we expect to be able to redeem this stock at cost. On October 19, 2016, FHLB declared a special cash dividend of $3.41 per share on capital stock outstanding during the third quarter of 2016. In addition, on October 27, 2016, FHLB announced a cash dividend for the third quarter of 2016 at an annualized dividend rate of 8.94% . Both dividends will be distributed in mid November 2016. 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. As a result 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 under the conversion rate of 1.6483 , as of the latest SEC Form 10-Q filed by Visa, Inc. on July 25, 2016, and the closing stock price of Class A shares, the value of our shares of Class B common stock would have been $2.3 million at September 30, 2016 and $2.2 million at December 31, 2015 . The conversion rate is subject to further reduction upon the final settlement of the covered litigation against Visa Inc. and its member banks. See Note 8 herein. We invest in low income housing tax credit funds as a limited partner, which totaled $2.5 million and $2.7 million recorded in other assets on the consolidated statements of condition at September 30, 2016 and December 31, 2015 , respectively. In the first nine months of 2016, we recognized $223 thousand of low income housing tax credits and other tax benefits, net of $177 thousand of amortization expense of low income housing tax credit investment, as a component of income tax expense. As of September 30, 2016 , our unfunded commitments for these low income housing tax credit funds totaled $1.5 million . We did not recognize any impairment losses on these low income housing tax credit investments during the first nine months of 2016 or 2015.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses Credit Quality of Loans Outstanding loans by class and payment aging as of September 30, 2016 and December 31, 2015 were as follows: 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 September 30, 2016 30-59 days past due $ 2 $ 135 $ — $ — $ 90 $ — $ 83 $ 310 60-89 days past due — — — — — — — — 90 days or more past due 44 176 — — 99 — — 319 Total past due 46 311 — — 189 — 83 629 Current 221,161 237,227 715,051 80,491 111,022 77,769 24,313 1,467,034 Total loans 3 $ 221,207 $ 237,538 $ 715,051 $ 80,491 $ 111,211 $ 77,769 $ 24,396 $ 1,467,663 Non-accrual 2 $ 44 $ 176 $ — $ — $ 260 $ — $ 60 $ 540 December 31, 2015 30-59 days past due $ 36 $ — $ 1,096 $ 1 $ — $ — $ 249 $ 1,382 60-89 days past due — — — — 633 — 89 722 90 days or more past due 21 — — — 99 — — 120 Total past due 57 — 1,096 1 732 — 338 2,224 Current 219,395 242,309 714,783 65,494 111,568 73,154 22,301 1,449,004 Total loans 3 $ 219,452 $ 242,309 $ 715,879 $ 65,495 $ 112,300 $ 73,154 $ 22,639 $ 1,451,228 Non-accrual 2 $ 21 $ — $ 1,903 $ 1 $ 171 $ — $ 83 $ 2,179 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. 2 Amounts include $1 thousand of purchased credit impaired ("PCI") loans that had stopped accreting interest at December 31, 2015 . Amounts exclude accreting PCI loans of $2.9 million and $3.7 million at September 30, 2016 and December 31, 2015 , respectively, 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. These accreting PCI loans are included in current loans. There were no accruing loans more than ninety days past due at September 30, 2016 or December 31, 2015 . 3 Amounts include net deferred loan costs of $869 thousand and $768 thousand at September 30, 2016 and December 31, 2015 , respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $1.9 million and $3.2 million at September 30, 2016 and December 31, 2015 , respectively. Our commercial loans are generally made to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and/or 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/or 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/or inventory, and typically include a personal guarantee. We target stable businesses with guarantors that have proven to be resilient in periods of economic stress. Typically, the guarantors provide an additional source of repayment for most of our credit extensions. 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 vast majority of our loans are guaranteed by the owners of the properties. Commercial real estate loans may be adversely affected by conditions in the real estate markets or in the general economy. In the event of a vacancy, guarantors are expected to carry the loans until a replacement tenant can be found. Regardless of the guaranty status, the owner's equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have experienced a low level of loss and delinquencies in this portfolio. Construction loans are generally made 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. The construction industry can be affected by significant events, 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 (tenancy-in-common, or “TIC”) loans, and installment and other consumer loans. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk. Additionally, trend reports are reviewed by Management on a regular basis. Our residential loan portfolio includes TIC units almost entirely in San Francisco. Installment and other consumer loans include mostly loans for floating homes and mobile homes along with a small number of installment loans. We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and ultimately in the portfolio. Definitions of loans that are risk graded “Special Mention” or worse are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC"). Our internally assigned grades are as follows: Pass : 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 in 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 new information is received. Borrowers are required to submit financial information at regular intervals: • Generally, 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. • Investor commercial real estate borrowers are generally required to submit rent rolls or property income statements annually. • Construction loans are monitored monthly, and reviewed on an ongoing basis. • Home equity and other consumer loans are reviewed based on delinquency. • Loans graded “Watch” or more severe, regardless of loan type, are reviewed no less than quarterly. The following table represents an analysis of loans by internally assigned grades, including the PCI loans, at September 30, 2016 and December 31, 2015 : Credit Risk Profile by Internally Assigned 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 September 30, 2016 Pass $ 203,784 $ 224,502 $ 711,192 $ 77,253 $ 108,908 $ 77,769 $ 23,976 $ 2,874 $ 1,430,258 Special Mention 8,859 4,478 356 — 1,120 — — — 14,813 Substandard 8,524 7,505 1,793 3,238 1,112 — 420 — 22,592 Total loans $ 221,167 $ 236,485 $ 713,341 $ 80,491 $ 111,140 $ 77,769 $ 24,396 $ 2,874 $ 1,467,663 December 31, 2015 Pass $ 192,560 $ 219,060 $ 710,042 $ 62,255 $ 109,959 $ 73,154 $ 22,307 $ 3,260 $ 1,392,597 Special Mention 22,457 12,371 372 — 1,100 — — — 36,300 Substandard 4,260 9,167 3,739 3,239 1,173 — 332 421 22,331 Total loans $ 219,277 $ 240,598 $ 714,153 $ 65,494 $ 112,232 $ 73,154 $ 22,639 $ 3,681 $ 1,451,228 Troubled Debt Restructuring Our loan portfolio includes certain loans that have been modified in a troubled debt restructuring (“TDR”), where economic concessions have been granted 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. A loan may no longer be reported as a TDR if all of the following conditions are met: • 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 removal of TDR status must be approved by the same management level that approved the upgrading of the loan classification. There were no loans removed from TDR designation during 2016. During the first nine months of 2015, four loans with a recorded investment totaling $1.4 million were removed from TDR designation as they met our criteria outlined above. The table below summarizes outstanding TDR loans by loan class as of September 30, 2016 and December 31, 2015 . The summary includes both TDRs that are on non-accrual status and those that continue to accrue interest. (in thousands) Recorded investment in Troubled Debt Restructurings 1 September 30, 2016 December 31, 2015 Commercial and industrial $ 2,964 $ 4,698 Commercial real estate, owner-occupied 6,993 6,993 Commercial real estate, investor 2,299 514 Construction 2 3,238 3,238 Home equity 696 460 Other residential 1,974 2,010 Installment and other consumer 1,024 1,168 Total $ 19,188 $ 19,081 1 Includes $19.1 million and $19.0 million of TDR loans that were accruing interest as of September 30, 2016 and December 31, 2015 , respectively. Includes no acquired loans at September 30, 2016 and $137 thousand of acquired loans at December 31, 2015 . 2 In June 2015, one TDR loan was transferred to loans held-for-sale at fair value totaling $1.5 million , net of an $839 thousand charge-off to the allowance for loan losses. The loan was subsequently sold in June 2015 for no additional gain or loss. The table below presents the following information for loans modified in a TDR during the presented periods: number of contracts modified, the recorded investment in the loans prior to modification, and the recorded investment in the loans after being restructured. The table below 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 Troubled Debt Restructurings during the three months ended September 30, 2016: None — $ — $ — $ — Troubled Debt Restructurings during the three months ended September 30, 2015: Commercial and industrial 1 $ 700 $ 700 $ 700 Troubled Debt Restructurings during the nine months ended September 30, 2016: Commercial real estate, investor 2 $ 1,830 $ 1,826 $ 1,808 Home equity 1 1 87 222 222 Total 3 $ 1,917 $ 2,048 $ 2,030 Troubled Debt Restructurings during the nine months ended September 30, 2015: Commercial and industrial 5 $ 1,482 $ 1,582 $ 1,463 Commercial real estate, investor 1 222 221 217 Total 6 $ 1,704 $ 1,803 $ 1,680 1 The home equity TDR modification during the second quarter of 2016 included debt consolidation which increased the post-modification balance. Modifications during the nine months ended September 30, 2016 primarily involved interest rate concessions, renewals, and other changes to loan terms. Modifications during the nine months ended September 30, 2015 primarily involved maturity extensions and other changes to loan terms. During the first nine months of 2016 and 2015, 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 Loan Balances and Their Related Allowance by Major Classes of Loans The tables below summarize information on impaired loans and their related allowance. 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 September 30, 2016 Recorded investment in impaired loans: With no specific allowance recorded $ 1,102 $ — $ — $ 2,688 $ 260 $ 1,189 $ 108 $ 5,347 With a specific allowance recorded 1,906 7,169 2,299 550 625 785 976 14,310 Total recorded investment in impaired loans $ 3,008 $ 7,169 $ 2,299 $ 3,238 $ 885 $ 1,974 $ 1,084 $ 19,657 Unpaid principal balance of impaired loans $ 3,008 $ 7,169 $ 2,299 $ 3,238 $ 885 $ 1,974 $ 1,084 $ 19,657 Specific allowance 569 108 474 5 34 59 94 1,343 Average recorded investment in impaired loans during the quarter ended 3,352 7,169 3,146 3,238 1,140 1,981 1,113 21,139 Interest income recognized on impaired loans during the quarter ended 1 44 67 1,385 32 38 22 12 1,600 Average recorded investment in impaired loans during the nine months ended September 30, 2016 3,802 7,081 3,397 3,238 1,098 1,993 1,179 21,788 Interest income recognized on impaired loans during the nine months ended September 30, 2016 1 142 133 1,489 105 48 67 37 2,021 Average recorded investment in impaired loans during the quarter ended September 30, 2015 4,473 7,695 2,886 3,262 610 2,025 1,439 22,390 Interest income recognized on impaired loans during the quarter ended September 30, 2015 58 84 10 22 5 23 15 217 Average recorded investment in impaired loans during the nine months ended September 30, 2015 4,121 8,183 2,916 4,473 616 2,033 1,579 23,921 Interest income recognized on impaired loans during the nine months ended September 30, 2015 176 228 24 40 14 69 51 602 1 Interest income recognized on a cash basis totaled $1.4 million for the three and nine months ended September 30, 2016 and was primarily related to the interest recovery upon the pay-off of a partially charged off non-accrual commercial real estate loan during the third quarter. No interest interest income on impaired loans was recognized on a cash basis during the three and nine months ended September 30, 2015. (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, 2015 Recorded investment in impaired loans: With no specific allowance recorded $ 2,198 $ 4,111 $ 2,416 $ 2,687 $ 171 $ 1,214 $ 131 $ 12,928 With a specific allowance recorded 2,522 2,882 — 551 388 797 1,120 8,260 Total recorded investment in impaired loans $ 4,720 $ 6,993 $ 2,416 $ 3,238 $ 559 $ 2,011 $ 1,251 $ 21,188 Unpaid principal balance of impaired loans $ 4,763 $ 6,993 $ 4,408 $ 3,424 $ 559 $ 2,011 $ 1,251 $ 23,409 Specific allowance $ 912 $ 70 $ — $ 1 $ 3 $ 67 $ 116 $ 1,169 Management monitors delinquent loans continuously and identifies problem loans, generally loans graded substandard or worse, to be evaluated individually for impairment testing. 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 amounts charged off for impaired loans outstanding at September 30, 2016 . The charged-off portion of impaired loans outstanding at December 31, 2015 totaled $2.1 million . In addition, the recorded investment in impaired loans is net of purchase discounts or premiums on acquired loans. At both September 30, 2016 and December 31, 2015 , unused commitments to extend credit on impaired loans, including loans to borrowers whose terms have been modified in TDRs, totaled $1.3 million . The following tables disclose loans by major portfolio category and activity in the ALLL, 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 September 30, 2016 Allowance for loan losses: Beginning balance $ 2,637 $ 1,631 $ 6,595 $ 831 $ 1,076 $ 426 $ 437 $ 1,454 $ 15,087 Provision (reversal) 828 (10 ) (2,416 ) 105 (125 ) 22 (73 ) 119 (1,550 ) Charge-offs — — — — — — — — — Recoveries 29 — 2,146 — 1 — — — 2,176 Ending balance $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Three months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,540 $ 2,052 $ 5,944 $ 535 $ 843 $ 435 $ 444 $ 1,561 $ 14,354 Provision (reversal) 86 17 128 158 9 (50 ) 32 (380 ) — Charge-offs (2 ) — — — — — (1 ) — (3 ) Recoveries 92 — 12 — 1 — 1 — 106 Ending balance $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 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 Nine months ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,023 $ 2,249 $ 6,178 $ 724 $ 910 $ 394 $ 425 $ 1,096 $ 14,999 Provision (reversal) 388 (628 ) (2,009 ) 212 40 54 (84 ) 477 (1,550 ) Charge-offs (9 ) — — — — — (4 ) — (13 ) Recoveries 92 — 2,156 — 2 — 27 — 2,277 Ending balance $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Nine months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,837 $ 1,924 $ 6,672 $ 839 $ 859 $ 433 $ 566 $ 969 $ 15,099 Provision (reversal) (306 ) 145 (606 ) 693 (9 ) (48 ) (81 ) 212 — Charge-offs (5 ) — — (839 ) — — (12 ) — (856 ) Recoveries 190 — 18 — 3 — 3 — 214 Ending balance $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 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 September 30, 2016 Ending ALLL related to loans collectively evaluated for impairment $ 2,925 $ 1,513 $ 5,851 $ 931 $ 918 $ 389 $ 270 $ 1,573 $ 14,370 Ending ALLL related to loans individually evaluated for impairment 569 108 474 5 34 59 94 — 1,343 Ending ALLL related to purchased credit-impaired loans — — — — — — — — — Total $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Loans outstanding: Collectively evaluated for impairment $ 218,159 $ 229,316 $ 711,042 $ 77,253 $ 110,255 $ 75,795 $ 23,312 $ — $ 1,445,132 Individually evaluated for impairment 3,008 7,169 2,299 3,238 885 1,974 1,084 — 19,657 Purchased credit-impaired 40 1,053 1,710 — 71 — — — 2,874 Total $ 221,207 $ 237,538 $ 715,051 $ 80,491 $ 111,211 $ 77,769 $ 24,396 $ — $ 1,467,663 Ratio of allowance for loan losses to total loans 1.58 % 0.68 % 0.88 % 1.16 % 0.86 % 0.58 % 1.49 % NM 1.07 % Allowance for loan losses to non-accrual loans 7,941 % 921 % NM NM 366 % NM 607 % NM 2,910 % 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, 2015 Ending ALLL related to loans collectively evaluated for impairment $ 2,111 $ 2,179 $ 6,178 $ 723 $ 907 $ 327 $ 309 $ 1,096 $ 13,830 Ending ALLL related to loans individually evaluated for impairment 904 70 — — 3 67 116 — 1,160 Ending ALLL related to purchased credit-impaired loans 8 — — 1 — — — — 9 Total $ 3,023 $ 2,249 $ 6,178 $ 724 $ 910 $ 394 $ 425 $ 1,096 $ 14,999 Loans outstanding: Collectively evaluated for impairment $ 214,695 $ 233,605 $ 711,737 $ 62,256 $ 111,673 $ 71,143 $ 21,388 $ — $ 1,426,497 Individually evaluated for impairment 1 4,582 6,993 2,416 3,238 559 2,011 1,251 — 21,050 Purchased credit-impaired 175 1,711 1,726 1 68 — — — 3,681 Total $ 219,452 $ 242,309 $ 715,879 $ 65,495 $ 112,300 $ 73,154 $ 22,639 $ — $ 1,451,228 Ratio of allowance for loan losses to total loans 1.38 % 0.93 % 0.86 % 1.11 % 0.81 % 0.54 % 1.88 % NM 1.03 % Allowance for loan losses to non-accrual loans 14,395 % NM 325 % 72,400 % 532 % NM 512 % NM 688 % 1 Total excludes $138 thousand PCI loans as of December 31, 2015 that have experienced credit deterioration post-acquisition declines in cash flows expected to be collected. These loans are included in the "purchased credit-impaired" amount in the next line below. NM - Not Meaningful Purchased Credit-Impaired Loans We evaluated loans purchased in acquisitions in accordance with accounting guidance in ASC 310-30 related to loans acquired with deteriorated credit quality. 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 two acquisitions to be PCI loans based on credit indicators such as non-accrual 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. For acquired loans not considered credit-impaired, the difference between the contractual amounts due (principal amount) and the fair value is accounted for subsequently through accretion. We recognize discount accretion based on the acquired loan’s contractual cash flows using an effective interest rate method. The accretion is recognized through the net interest margin. The following table presents the outstanding balances and related carrying values of PCI loans as of September 30, 2016 and December 31, 2015 . September 30, 2016 December 31, 2015 PCI Loans (in thousands) Unpaid principal balance Carrying value Unpaid principal balance Carrying value Commercial and industrial $ 47 $ 40 $ 237 $ 175 Commercial real estate 3,080 2,763 4,329 3,437 Construction — — 187 1 Home equity 220 71 224 68 Total purchased credit-impaired loans $ 3,347 $ 2,874 $ 4,977 $ 3,681 The activities in the accretable yield, or income expected to be earned, for PCI loans were as follows: Accretable Yield Three months ended Nine months ended (in thousands) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Balance at beginning of period $ 1,655 $ 3,711 $ 2,618 $ 4,027 Removals 1 — (837 ) (778 ) (914 ) Accretion (89 ) (128 ) (274 ) (367 ) Reclassifications from nonaccretable difference 2 — — — — Balance at end of period $ 1,566 $ 2,746 $ 1,566 $ 2,746 1 Represents the accretable difference that is relieved when a loan exits the PCI population due to pay-off, full charge-off, or transfer to repossessed assets, etc. 2 Primarily relates to changes in expected credit performance and changes in expected timing of cash flows. Pledged Loans Our FHLB line of credit is secured under terms of a blanket collateral agreement by a pledge of certain qualifying loans with an unpaid principal balance of $863.2 million and $833.8 million at September 30, 2016 and December 31, 2015 , respectively. In addition, we pledge a certain residential loan portfolio, which totaled $48.7 million and $45.2 million at September 30, 2016 and December 31, 2015 , respectively, to secure our borrowing capacity with the Federal Reserve Bank of San Francisco. Also see Note 6, Borrowings.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Borrowings	Borrowings Federal Funds Purchased – The Bank had unsecured lines of credit totaling $92.0 million with correspondent banks for overnight borrowings at September 30, 2016 and December 31, 2015 . In general, interest rates on these lines approximate the federal funds target rate. We had no overnight borrowings under these credit facilities at September 30, 2016 and December 31, 2015 . Federal Home Loan Bank Borrowings – As of September 30, 2016 and December 31, 2015 , the Bank had lines of credit with the FHLB totaling $487.6 million and $470.6 million , respectively, based on eligible collateral of certain loans. At September 30, 2016 , we had no FHLB overnight borrowings and at December 31, 2015 , we had $52.0 million in FHLB overnight borrowings. On February 5, 2008, the Bank entered into a ten -year borrowing agreement under the same FHLB line of credit for $15.0 million at a fixed rate of 2.07% . On June 15, 2016, the Bank repaid the $15.0 million early and incurred a prepayment fee of $312 thousand recorded in interest expense. At September 30, 2016 and December 31, 2015 , $487.6 million and $403.4 million , respectively, were remaining as available for borrowing from the FHLB, net of the overnight borrowings and term borrowings. Federal Reserve Line of Credit – The Bank has a line of credit with the Federal Reserve Bank of San Francisco ("FRBSF") secured by certain residential loans. At September 30, 2016 and December 31, 2015 , the Bank had borrowing capacity under this line totaling $38.8 million and $37.8 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 $145 thousand in the first nine months of 2016 and $158 thousand in the first nine months of 2015. 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 is a summary of the contractual terms of the subordinated debentures due to the Trusts as of September 30, 2016 : (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 (3.73% as of September 30, 2016), 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 (2.25% as of September 30, 2016), redeemable, in whole or in part, on any interest payment date 4,124 Total $ 8,248

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Warrant Under the United States Department of the Treasury Capital Purchase Program (the “TCPP”), Bancorp issued to the U.S. Treasury a warrant to purchase 154,242 shares of common stock at a per share exercise price of $27.23 . The warrant was immediately exercisable and had an expiration date of December 5, 2018. The warrant was subsequently auctioned to two institutional investors in November 2011 and was exercised in September 2015. The warrant represented the right to purchase 157,711 shares of common stock at $26.63 per share. The cashless exercise resulted in the net issuance of 70,591 shares of common stock in September 2015. Dividends Presented below is a summary of cash dividends paid to common shareholders, recorded as a reduction of retained earnings. Three months ended Nine months ended (in thousands, except per share data) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Cash dividends to common stockholders $ 1,528 $ 1,316 $ 4,573 $ 3,936 Cash dividends per common share $ 0.25 $ 0.22 $ 0.75 $ 0.66 The Board of Directors declared a cash dividend of $0.27 per share on October 21, 2016 payable on November 14, 2016 to shareholders of record at the close of business on November 4, 2016. 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 with a corresponding increase in common stock. Stock-based compensation also includes compensation expense related to the issuance of unvested restricted stock awards and performance-based stock awards pursuant to the 2007 Equity Plan. The grant-date fair value of the restricted stock awards and performance-based stock awards, which is equal to the intrinsic value on that date, is being recorded as compensation expense over the requisite service period with a corresponding increase in common stock as the shares vest. Beginning in 2015, performance-based stock awards were 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 cliff vested. 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 on the exercise of non-qualified stock options, the disqualifying disposition of incentive stock options and vesting of restricted stock awards as an addition to common stock with a corresponding decrease in current taxes payable. The holders of unvested restricted stock awards and performance-based stock awards are entitled to dividends on the same per-share ratio as holders of common stock. Dividends paid on the portion of share-based awards not expected to vest are also included in stock-based compensation expense. Tax benefits on dividends paid on the portion of share-based awards expected to vest are recorded as an increase to common stock with a corresponding decrease in current taxes payable.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
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 upon, the total commitment amount does not necessarily represent future cash requirements. We are exposed to credit loss 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 on the consolidated statements of condition was $416.5 million and $376.6 million at September 30, 2016 and December 31, 2015 , respectively. Commitments at September 30, 2016 included $212.6 million under commercial lines of credit (these commitments are generally contingent upon customers maintaining specific credit standards), $149.0 million under revolving home equity lines, $40.7 million under construction loans, $3.5 million under standby letters of credit, and a remaining $10.7 million under personal and other lines of credit. We record an allowance for losses on these off-balance sheet commitments based on an estimate of probabilities of these commitments being drawn upon according to our historical utilization experience on different types of commitments and expected loss severity. We set aside an allowance for losses on off-balance sheet commitments in the amount of $899 thousand and $749 thousand as of September 30, 2016 and December 31, 2015 , respectively, which is recorded in interest payable and other liabilities on the consolidated statements of condition. The increase in the reserve for off-balance sheet commitments for the first nine months of 2016 was primarily due to an increase in commitments and a decrease in utilization. Operating Leases We rent certain premises and equipment 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 September 30, 2016 , the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows: (in thousands) 2016 2017 2018 2019 2020 Thereafter Total Operating leases 1 $ 903 $ 3,832 $ 3,898 $ 3,707 $ 3,385 $ 6,321 $ 22,046 1 Minimum payments have not been reduced by minimum sublease rentals of $175 thousand due in the future under non-cancelable subleases. Rent expense included in occupancy expense totaled $2.8 million and $3.2 million for the nine months ended September 30, 2016 and 2015 , respectively. Litigation Matters We may be party to legal actions which arise from time to time as part of the normal course of our business. We believe, after consultation with legal counsel, that we have meritorious defenses in these actions, and that litigation contingent liability, if any, will not have a material adverse effect on our financial position, results of operations, or cash flows. We are responsible for our 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"). Visa maintains an escrow account from which settlements of, or judgments in, the Covered Litigation are paid. While the accrual related to the Covered Litigation could be higher or lower than the litigation escrow account balance, Visa did not record an additional accrual for the Covered Litigation during 2016. At June 30, 2016, according to the latest SEC Form 10-Q filed by Visa, Inc. on July 25, 2016, the balance of the escrow account was $1.0 billion . Visa had reached a $4.0 billion interchange multidistrict litigation class settlement agreement. However, a number of objectors have appealed and on June 30, 2016, an appellate court reversed the approval of the settlement by the lower court. 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. The conversion rate of Visa Class B common stock held by us to Class A common stock (as discussed in Note 4, Investment Securities) may decrease if Visa makes more Covered Litigation settlement payments in the future, and the full effect on member banks is still uncertain. However, we are not aware of significant future cash settlement payments required by us on the Covered Litigation.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2016
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 asset/liability 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. The fixed-rate payment features of the interest rate swap agreements are generally structured at inception to mirror substantially all of the provisions of the hedged loan agreements. These interest rate swaps, designated and qualified as fair value hedges, are carried on the consolidated statements of condition at their fair value in other assets (when the fair value is positive) or in other liabilities (when the fair value is negative). The unrealized gain or loss in fair value of the hedged fixed-rate loan due to LIBOR interest rate movements is recorded as an adjustment to the hedged loan. From time to time, we make firm commitments to enter into long-term fixed-rate loans with borrowers backed by yield maintenance agreements and simultaneously enter into forward interest rate swap agreements with correspondent banks to mitigate the change in fair value of the yield maintenance agreement. Prior to loan funding, yield maintenance agreements with net settlement features that meet the definition of a derivative are considered as non-designated hedges and are carried on the consolidated statements of condition at their fair value in other assets (when the fair value is positive) or in other liabilities (when the fair value is negative). The offsetting changes in the fair value of the forward swap and the yield maintenance agreement are recorded in interest income. When the fixed-rate loans are originated, the forward swaps are designated to offset the change in fair value in the loans. Subsequent to the point of the swap designations, the related yield maintenance agreements are no longer considered derivatives. Their fair value at the designation date is recorded in other assets and is amortized using the effective yield method over the life of the respective designated loans. The net effect of the change in fair value of interest rate swaps, the amortization of the yield maintenance agreements and the change in the fair value of the hedged loans result in an insignificant amount of hedge ineffectiveness recognized in interest income. 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 September 30, 2016 , 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 accounted for as fair value hedges. The notional amounts of the interest rate contracts are equal to the notional amounts of the hedged loans. In September 2016, one interest rate swap scheduled to mature in August 2020 was terminated as the hedged loan was paid off. In April 2016, one interest rate swap scheduled to mature in June 2020 was terminated as the hedged loan was paid off. In both cases, prepayment fees were collected from the borrowers to settle our interest rate swap liability, resulting in no net gain or loss on the terminations of the swaps and loan pay-offs. Our interest rate swap payments are settled monthly with counterparties. Accrued interest on the swaps totaled $15 thousand and $28 thousand as of September 30, 2016 and December 31, 2015 , respectively. Information on our derivatives follows: Asset derivatives Liability derivatives (in thousands) September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015 Fair value hedges: Interest rate contracts notional amount $ — $ 4,407 $ 19,928 $ 22,187 Interest rate contracts fair value 1 $ — $ 3 $ 2,480 $ 1,658 Three months ended (in thousands) September 30, 2016 September 30, 2015 Increase (decrease) in value of designated interest rate swaps recognized in interest income $ 241 $ (813 ) Payment on interest rate swaps recorded in interest income (132 ) (231 ) (Decrease) increase in value of hedged loans recognized in interest income (268 ) 905 Decrease in value of yield maintenance agreement recognized against interest income (67 ) (13 ) Net loss on derivatives recognized against interest income 2 $ (226 ) $ (152 ) Nine months ended (in thousands) September 30, 2016 September 30, 2015 Decrease in value of designated interest rate swaps recognized in interest income $ (825 ) $ (393 ) Payment on interest rate swaps recorded in interest income (445 ) (700 ) Increase in value of hedged loans recognized in interest income 1,022 453 Decrease in value of yield maintenance agreement recognized against interest income (90 ) (39 ) Net loss on derivatives recognized against interest income 2 $ (338 ) $ (679 ) 1 See Note 3 for valuation methodology. 2 Includes hedge ineffectiveness loss of $94 thousand and gain of $79 thousand for the quarters ended September 30, 2016 and September 30, 2015 , respectively. Ineffectiveness gains of $107 thousand and $21 thousand were recorded in interest income during the nine months ended September 30, 2016 and September 30, 2015 , respectively. Changes in value of swaps were included in the assessment of hedge effectiveness. Hedge ineffectiveness is the measure of the extent to which the change in the fair value of the hedging instruments does not exactly offset the change in the fair value of the hedged items from period to period. 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. Information on financial instruments that are eligible for offset in the consolidated statements of condition follows: 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) Assets 1 Condition of Condition 1 Instruments Received Net Amount September 30, 2016 Derivatives by Counterparty: None $ — $ — $ — $ — $ — $ — December 31, 2015 Derivatives by Counterparty: Counterparty A $ 3 $ — $ 3 $ (3 ) $ — $ — 1 Amounts exclude accrued interest totaling zero and $1 thousand at September 30, 2016 and December 31, 2015 , respectively. 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) Liabilities 2 Condition of Condition 2 Instruments Pledged Net Amount September 30, 2016 Derivatives by Counterparty: Counterparty A $ 2,480 $ — $ 2,480 $ — $ (2,480 ) $ — December 31, 2015 Derivatives by Counterparty: Counterparty A $ 1,390 $ — $ 1,390 $ (3 ) $ (1,387 ) $ — Counterparty B 268 — 268 — (268 ) — Total $ 1,658 $ — $ 1,658 $ (3 ) $ (1,655 ) $ — 2 Amounts exclude accrued interest totaling $15 thousand and $27 thousand at September 30, 2016 and December 31, 2015 , respectively.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2016
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 the holding company 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 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 2015 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. We have evaluated subsequent events through the date of filing with the SEC and have determined that there are no subsequent events that require additional recognition or disclosure. 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's investment in the securities of the Trusts is accounted for under the equity method and is included in interest receivable and other assets on 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, which is based on average market prices during the three months of 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. We have two forms of our 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. Therefore, under the two-class method, the difference in EPS is not significant for these participating securities.
Recently 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). This ASU is a converged standard involving FASB and International Financial Reporting Standards that provides a single comprehensive revenue recognition model for all contracts with customers across transactions and industries. The core principal of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount and at a time that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Subsequent updates related to Revenue from Contracts with Customers (Topic 606) are as follows: • August 2015 ASU No. 2015-14 - Deferral of the Effective Date , institutes a one-year deferral of the effective date of this amendment to annual reporting periods beginning after December 15, 2017. Early application is permitted only as of annual periods beginning after December 15, 2016, including interim reporting periods within that reporting period. • March 2016 ASU No. 2016-08 - Principal versus Agent Considerations (Reporting Revenue Gross versus Net), clarifies the implementation guidance on principal versus agent considerations and on the use of indicators that assist an entity in determining whether it controls a specified good or service before it is transferred to the customer. • April 2016 ASU No. 2016-10 - Identifying Performance Obligations and Licensing, provides guidance in determining performance obligations in a contract with a customer and clarifies whether a promise to grant a license provides a right to access or the right to use intellectual property. • May 2016 ASU No. 2016-12 - Narrow Scope Improvements and Practical Expedients , gives further guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. We are currently evaluating the provisions of these updates and will be monitoring developments and additional guidance to determine the potential impact the new standards will have on our financial condition and results of operations. 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 GAAP related to financial instruments that include the following as applicable to us. • Equity investments, except for those accounted for under the equity method of accounting or those that result in consolidation of the investee, are required 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 - if impairment exists, this requires measuring the investment at fair value. • Eliminates the requirement for public companies to disclose the method(s) and significant assumptions used to estimate the fair value that is currently required to be disclosed for financial instruments measured at amortized cost on the balance sheet. • Public companies will be required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. • The reporting 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. ASU 2016-01 is effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. This ASU will impact our financial statement disclosures, however, we do not expect it to have a material impact on our financial condition or results of operations. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . This ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities, including leases classified as operating leases under previous GAAP, on the balance sheet and requiring additional disclosures of key information about leasing arrangements. This ASU 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 upon adoption. Early application of the amendments is permitted. We are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the timing of our adoption and the potential outcome the amendments will have on our financial condition and results of operations. In March 2016, the FASB issued ASU No. 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships . A contract novation refers to replacing one of the parties to a derivative instrument with a new party. This ASU clarifies that a change in counterparty in a derivative instrument does not, in and of itself, require dedesignation of that hedging relationship and therefore discontinue the application of hedge accounting. ASU 2016-05 is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted in any interim or annual period. We do not expect this ASU to have a material impact on our financial condition or results of operations. In March 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . This ASU identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, forfeiture accounting, and classifications on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. We are currently evaluating the the provisions of this ASU and will be monitoring developments and additional guidance to determine the potential outcome the amendments will have on 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 . This ASU replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses, requiring a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses, which is likely to result in more timely recognition of such losses. In addition, the accounting for purchased credit impaired financial assets will make the allowance for credit losses more comparable between originated assets and purchased financial assets, as well as reduce complexity with the accounting for interest income. 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 are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the timing of our adoption and the potential outcome the amendments will have on our financial condition and results of operations. 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 issues 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 do not expect this ASU to have a material impact on our financial condition or results of operations.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2016
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, unvested restricted stock awards and stock warrant, 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, which is based on average market prices during the three months of 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. We have two forms of our 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. Therefore, under the two-class method, the difference in EPS is not significant for these participating securities. Three months ended Nine months ended (in thousands, except per share data) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Weighted average basic shares outstanding 6,083 5,963 6,070 5,943 Potentially dilutive common shares related to: Stock options 27 35 30 41 Unvested restricted stock awards 7 5 6 5 Warrant — 64 — 70 Weighted average diluted shares outstanding 6,117 6,067 6,106 6,059 Net income $ 6,964 $ 4,773 $ 17,447 $ 13,516 Basic EPS $ 1.14 $ 0.80 $ 2.87 $ 2.27 Diluted EPS $ 1.14 $ 0.79 $ 2.86 $ 2.23 Weighted average anti-dilutive shares not included in the calculation of diluted EPS 71 42 65 35

Fair Value of Assets and Liab18

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
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) September 30, 2016 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 252,824 $ — $ 252,199 $ 625 Debentures of government-sponsored agencies 40,576 — 40,576 — Privately-issued collateralized mortgage obligations 560 — 560 — Obligations of state and political subdivisions 80,027 — 80,027 — Corporate bonds 5,009 — 5,009 — Derivative financial liabilities (interest rate contracts) 2,480 — 2,480 — December 31, 2015 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 190,093 $ — $ 188,381 $ 1,712 Debentures of government-sponsored agencies 160,892 — 160,892 — Privately-issued collateralized mortgage obligations 4,150 — 4,150 — Obligations of state and political subdivisions 57,673 — 57,673 — Corporate bonds 4,979 — 4,979 — Derivative financial assets (interest rate contracts) 3 — 3 — Derivative financial liabilities (interest rate contracts) 1,658 — 1,658 —
Fair Value Measurements, Nonrecurring	The following table presents the carrying value of assets and liabilities measured at fair value on a non-recurring basis and that were held in the consolidated statements of condition at each respective period end, by level within the fair value hierarchy as of September 30, 2016 and December 31, 2015 . (in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2016 Impaired loans 1 $ 124 $ — $ — $ 124 Other real estate owned 408 — — 408 December 31, 2015 Impaired loans $ — $ — $ — $ — Other real estate owned 421 — — 421 1 Represents collateral-dependent loan principal balances that had been generally written down to the values of the underlying collateral and reflected net of specific valuation allowances. At September 30, 2016 , the $124 thousand carrying value of a consumer loan was net of a $52 thousand specific valuation allowance. The carrying value of loans fully charged-off, which includes unsecured lines of credit, overdrafts and all other loans, is zero.
Fair Value, by Balance Sheet Grouping	The table below is a summary of fair value estimates for financial instruments as of September 30, 2016 and December 31, 2015 , 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. We have excluded non-financial assets and non-financial liabilities defined by the Codification (ASC 820-10-15-1A), such as Bank premises and equipment, deferred taxes and other liabilities. In addition, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements of the Financial Instruments Topic of the Codification (ASC 825-10-50-8), such as bank-owned life insurance policies ("BOLI"). September 30, 2016 December 31, 2015 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets Cash and cash equivalents $ 96,930 $ 96,930 Level 1 $ 26,343 $ 26,343 Level 1 Investment securities held-to-maturity 46,423 47,867 Level 2 69,637 71,054 Level 2 Loans, net 1,451,950 1,471,861 Level 3 1,436,229 1,470,380 Level 3 Interest receivable 5,645 5,645 Level 2 6,643 6,643 Level 2 Financial liabilities Deposits 1,801,469 1,801,932 Level 2 1,728,226 1,728,717 Level 2 Federal Home Loan Bank and other borrowings — — Level 2 67,000 67,279 Level 2 Subordinated debentures 5,540 5,156 Level 3 5,395 5,132 Level 3 Interest payable 138 138 Level 2 187 187 Level 2

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities and Held-to-maturity Securities Reconciliation	Our investment securities portfolio consists of obligations of state and political subdivisions, corporate bonds, U.S. government agency securities, including mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMOs”) issued or guaranteed by Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), or Government National Mortgage Association ("GNMA"), debentures issued by government-sponsored agencies such as FNMA, Federal Farm Credit Bureau, FHLB and FHLMC, as well as privately issued CMOs, as reflected in the table below: September 30, 2016 December 31, 2015 Amortized Fair Gross Unrealized Amortized Fair Gross Unrealized (in thousands) Cost Value Gains (Losses) Cost Value Gains (Losses) Held-to-maturity: Obligations of state and political subdivisions $ 32,765 $ 33,868 $ 1,106 $ (3 ) $ 42,919 $ 44,146 $ 1,246 $ (19 ) Corporate bonds 3,524 3,523 0 (1 ) 15,072 15,098 42 (16 ) MBS pass-through securities issued by FHLMC and FNMA 10,134 10,476 342 — 11,646 11,810 171 (7 ) Total held-to-maturity 46,423 47,867 1,448 (4 ) 69,637 71,054 1,459 (42 ) Available-for-sale: Securities of U.S. government or government-sponsored agencies: MBS pass-through securities issued by FHLMC and FNMA 196,987 198,999 2,239 (227 ) 138,222 138,462 694 (454 ) CMOs issued by FNMA 14,885 15,104 219 — 18,266 18,219 97 (144 ) CMOs issued by FHLMC 30,555 30,887 332 — 22,889 22,932 82 (39 ) CMOs issued by GNMA 7,654 7,834 180 — 10,326 10,480 169 (15 ) Debentures of government- sponsored agencies 40,486 40,576 98 (8 ) 161,690 160,892 28 (826 ) Privately issued CMOs 560 560 1 (1 ) 3,960 4,150 190 — Obligations of state and political subdivisions 78,719 80,027 1,401 (93 ) 57,110 57,673 580 (17 ) Corporate bonds 4,956 5,009 53 — 4,947 4,979 43 (11 ) Total available-for-sale 374,802 378,996 4,523 (329 ) 417,410 417,787 1,883 (1,506 ) Total investment securities $ 421,225 $ 426,863 $ 5,971 $ (333 ) $ 487,047 $ 488,841 $ 3,342 $ (1,548 )
Investments Classified by Contractual Maturity Date	The amortized cost and fair value of investment debt securities by contractual maturity at September 30, 2016 are shown below. Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2016 December 31, 2015 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 $ 14,037 $ 14,115 $ 17,067 $ 17,080 $ 18,853 $ 18,920 $ 12,135 $ 12,176 After one year but within five years 16,583 17,212 67,087 67,487 31,677 32,360 188,007 187,326 After five years through ten years 4,467 4,739 87,774 88,871 8,580 8,969 64,899 64,999 After ten years 11,336 11,801 202,873 205,558 10,527 10,805 152,369 153,286 Total $ 46,423 $ 47,867 $ 374,801 $ 378,996 $ 69,637 $ 71,054 $ 417,410 $ 417,787
Schedule of Realized Gain (Loss)	Sales of investment securities and gross realized gains and losses are shown in the following table. Three months ended Nine months ended (in thousands) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Available-for-sale: Sales proceeds $ — $ — $ 68,673 $ 1,559 Gross realized gains — — 458 8 Gross realized losses — — (64 ) — Held-to-Maturity: Sales proceeds $ — $ 1,015 $ — $ 1,015 Gross realized gains — 72 — 72 Gross realized losses — — — —
Schedule of Unrealized Loss on Investments	Those securities are summarized and classified according to the duration of the loss period in the tables below: September 30, 2016 < 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 $ 547 $ (3 ) $ — $ — $ 547 $ (3 ) Corporate bonds 3,523 (1 ) — — 3,523 (1 ) Total held-to-maturity 4,070 (4 ) — — 4,070 (4 ) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 69,229 (227 ) — — 69,229 (227 ) Debentures of government- sponsored agencies 14,992 (8 ) — — 14,992 (8 ) Privately issued CMOs 162 (1 ) — — 162 (1 ) Obligations of state & political subdivisions 14,236 (93 ) — — 14,236 (93 ) Total available-for-sale 98,619 (329 ) — — 98,619 (329 ) Total temporarily impaired securities $ 102,689 $ (333 ) $ — $ — $ 102,689 $ (333 ) December 31, 2015 < 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 $ 8,297 $ (19 ) $ — $ — $ 8,297 $ (19 ) Corporate bonds 3,523 (15 ) 1,999 (1 ) 5,522 (16 ) MBS pass-through securities issued by FHLMC and FNMA 2,332 (7 ) — — 2,332 (7 ) Total held-to-maturity 14,152 (41 ) 1,999 (1 ) 16,151 (42 ) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 68,809 (454 ) — — 68,809 (454 ) CMOs issued by FNMA 9,277 (80 ) 3,158 (64 ) 12,435 (144 ) CMOs issued by FHLMC — — 1,989 (39 ) 1,989 (39 ) CMOs issued by GNMA 164 — 2,374 (15 ) 2,538 (15 ) Debentures of government- sponsored agencies 136,064 (713 ) 9,887 (113 ) 145,951 (826 ) Obligations of state & political subdivisions 4,557 (15 ) 579 (2 ) 5,136 (17 ) Corporate bonds 2,986 (11 ) — — 2,986 (11 ) Total available-for-sale 221,857 (1,273 ) 17,987 (233 ) 239,844 (1,506 ) Total temporarily impaired securities $ 236,009 $ (1,314 ) $ 19,986 $ (234 ) $ 255,995 $ (1,548 )

Loans and Allowance for Loan 20

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Past Due Financing Receivables	Outstanding loans by class and payment aging as of September 30, 2016 and December 31, 2015 were as follows: 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 September 30, 2016 30-59 days past due $ 2 $ 135 $ — $ — $ 90 $ — $ 83 $ 310 60-89 days past due — — — — — — — — 90 days or more past due 44 176 — — 99 — — 319 Total past due 46 311 — — 189 — 83 629 Current 221,161 237,227 715,051 80,491 111,022 77,769 24,313 1,467,034 Total loans 3 $ 221,207 $ 237,538 $ 715,051 $ 80,491 $ 111,211 $ 77,769 $ 24,396 $ 1,467,663 Non-accrual 2 $ 44 $ 176 $ — $ — $ 260 $ — $ 60 $ 540 December 31, 2015 30-59 days past due $ 36 $ — $ 1,096 $ 1 $ — $ — $ 249 $ 1,382 60-89 days past due — — — — 633 — 89 722 90 days or more past due 21 — — — 99 — — 120 Total past due 57 — 1,096 1 732 — 338 2,224 Current 219,395 242,309 714,783 65,494 111,568 73,154 22,301 1,449,004 Total loans 3 $ 219,452 $ 242,309 $ 715,879 $ 65,495 $ 112,300 $ 73,154 $ 22,639 $ 1,451,228 Non-accrual 2 $ 21 $ — $ 1,903 $ 1 $ 171 $ — $ 83 $ 2,179 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. 2 Amounts include $1 thousand of purchased credit impaired ("PCI") loans that had stopped accreting interest at December 31, 2015 . Amounts exclude accreting PCI loans of $2.9 million and $3.7 million at September 30, 2016 and December 31, 2015 , respectively, 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. These accreting PCI loans are included in current loans. There were no accruing loans more than ninety days past due at September 30, 2016 or December 31, 2015 . 3 Amounts include net deferred loan costs of $869 thousand and $768 thousand at September 30, 2016 and December 31, 2015 , respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $1.9 million and $3.2 million at September 30, 2016 and December 31, 2015 , respectively.
Financing Receivable Credit Quality Indicators	The following table represents an analysis of loans by internally assigned grades, including the PCI loans, at September 30, 2016 and December 31, 2015 : Credit Risk Profile by Internally Assigned 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 September 30, 2016 Pass $ 203,784 $ 224,502 $ 711,192 $ 77,253 $ 108,908 $ 77,769 $ 23,976 $ 2,874 $ 1,430,258 Special Mention 8,859 4,478 356 — 1,120 — — — 14,813 Substandard 8,524 7,505 1,793 3,238 1,112 — 420 — 22,592 Total loans $ 221,167 $ 236,485 $ 713,341 $ 80,491 $ 111,140 $ 77,769 $ 24,396 $ 2,874 $ 1,467,663 December 31, 2015 Pass $ 192,560 $ 219,060 $ 710,042 $ 62,255 $ 109,959 $ 73,154 $ 22,307 $ 3,260 $ 1,392,597 Special Mention 22,457 12,371 372 — 1,100 — — — 36,300 Substandard 4,260 9,167 3,739 3,239 1,173 — 332 421 22,331 Total loans $ 219,277 $ 240,598 $ 714,153 $ 65,494 $ 112,232 $ 73,154 $ 22,639 $ 3,681 $ 1,451,228
Troubled Debt Restructurings on Financing Receivables	The table below summarizes outstanding TDR loans by loan class as of September 30, 2016 and December 31, 2015 . The summary includes both TDRs that are on non-accrual status and those that continue to accrue interest. (in thousands) Recorded investment in Troubled Debt Restructurings 1 September 30, 2016 December 31, 2015 Commercial and industrial $ 2,964 $ 4,698 Commercial real estate, owner-occupied 6,993 6,993 Commercial real estate, investor 2,299 514 Construction 2 3,238 3,238 Home equity 696 460 Other residential 1,974 2,010 Installment and other consumer 1,024 1,168 Total $ 19,188 $ 19,081 1 Includes $19.1 million and $19.0 million of TDR loans that were accruing interest as of September 30, 2016 and December 31, 2015 , respectively. Includes no acquired loans at September 30, 2016 and $137 thousand of acquired loans at December 31, 2015 . 2 In June 2015, one TDR loan was transferred to loans held-for-sale at fair value totaling $1.5 million , net of an $839 thousand charge-off to the allowance for loan losses. The loan was subsequently sold in June 2015 for no additional gain or loss. The table below presents the following information for loans modified in a TDR during the presented periods: number of contracts modified, the recorded investment in the loans prior to modification, and the recorded investment in the loans after being restructured. The table below 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 Troubled Debt Restructurings during the three months ended September 30, 2016: None — $ — $ — $ — Troubled Debt Restructurings during the three months ended September 30, 2015: Commercial and industrial 1 $ 700 $ 700 $ 700 Troubled Debt Restructurings during the nine months ended September 30, 2016: Commercial real estate, investor 2 $ 1,830 $ 1,826 $ 1,808 Home equity 1 1 87 222 222 Total 3 $ 1,917 $ 2,048 $ 2,030 Troubled Debt Restructurings during the nine months ended September 30, 2015: Commercial and industrial 5 $ 1,482 $ 1,582 $ 1,463 Commercial real estate, investor 1 222 221 217 Total 6 $ 1,704 $ 1,803 $ 1,680 1 The home equity TDR modification during the second quarter of 2016 included debt consolidation which increased the post-modification balance.
Impaired Financing Receivables	The tables below summarize information on impaired loans and their related allowance. 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 September 30, 2016 Recorded investment in impaired loans: With no specific allowance recorded $ 1,102 $ — $ — $ 2,688 $ 260 $ 1,189 $ 108 $ 5,347 With a specific allowance recorded 1,906 7,169 2,299 550 625 785 976 14,310 Total recorded investment in impaired loans $ 3,008 $ 7,169 $ 2,299 $ 3,238 $ 885 $ 1,974 $ 1,084 $ 19,657 Unpaid principal balance of impaired loans $ 3,008 $ 7,169 $ 2,299 $ 3,238 $ 885 $ 1,974 $ 1,084 $ 19,657 Specific allowance 569 108 474 5 34 59 94 1,343 Average recorded investment in impaired loans during the quarter ended 3,352 7,169 3,146 3,238 1,140 1,981 1,113 21,139 Interest income recognized on impaired loans during the quarter ended 1 44 67 1,385 32 38 22 12 1,600 Average recorded investment in impaired loans during the nine months ended September 30, 2016 3,802 7,081 3,397 3,238 1,098 1,993 1,179 21,788 Interest income recognized on impaired loans during the nine months ended September 30, 2016 1 142 133 1,489 105 48 67 37 2,021 Average recorded investment in impaired loans during the quarter ended September 30, 2015 4,473 7,695 2,886 3,262 610 2,025 1,439 22,390 Interest income recognized on impaired loans during the quarter ended September 30, 2015 58 84 10 22 5 23 15 217 Average recorded investment in impaired loans during the nine months ended September 30, 2015 4,121 8,183 2,916 4,473 616 2,033 1,579 23,921 Interest income recognized on impaired loans during the nine months ended September 30, 2015 176 228 24 40 14 69 51 602 1 Interest income recognized on a cash basis totaled $1.4 million for the three and nine months ended September 30, 2016 and was primarily related to the interest recovery upon the pay-off of a partially charged off non-accrual commercial real estate loan during the third quarter. No interest interest income on impaired loans was recognized on a cash basis during the three and nine months ended September 30, 2015. (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, 2015 Recorded investment in impaired loans: With no specific allowance recorded $ 2,198 $ 4,111 $ 2,416 $ 2,687 $ 171 $ 1,214 $ 131 $ 12,928 With a specific allowance recorded 2,522 2,882 — 551 388 797 1,120 8,260 Total recorded investment in impaired loans $ 4,720 $ 6,993 $ 2,416 $ 3,238 $ 559 $ 2,011 $ 1,251 $ 21,188 Unpaid principal balance of impaired loans $ 4,763 $ 6,993 $ 4,408 $ 3,424 $ 559 $ 2,011 $ 1,251 $ 23,409 Specific allowance $ 912 $ 70 $ — $ 1 $ 3 $ 67 $ 116 $ 1,169
Allowance for Credit Losses on Financing Receivables	The following tables disclose loans by major portfolio category and activity in the ALLL, 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 September 30, 2016 Allowance for loan losses: Beginning balance $ 2,637 $ 1,631 $ 6,595 $ 831 $ 1,076 $ 426 $ 437 $ 1,454 $ 15,087 Provision (reversal) 828 (10 ) (2,416 ) 105 (125 ) 22 (73 ) 119 (1,550 ) Charge-offs — — — — — — — — — Recoveries 29 — 2,146 — 1 — — — 2,176 Ending balance $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Three months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,540 $ 2,052 $ 5,944 $ 535 $ 843 $ 435 $ 444 $ 1,561 $ 14,354 Provision (reversal) 86 17 128 158 9 (50 ) 32 (380 ) — Charge-offs (2 ) — — — — — (1 ) — (3 ) Recoveries 92 — 12 — 1 — 1 — 106 Ending balance $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 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 Nine months ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,023 $ 2,249 $ 6,178 $ 724 $ 910 $ 394 $ 425 $ 1,096 $ 14,999 Provision (reversal) 388 (628 ) (2,009 ) 212 40 54 (84 ) 477 (1,550 ) Charge-offs (9 ) — — — — — (4 ) — (13 ) Recoveries 92 — 2,156 — 2 — 27 — 2,277 Ending balance $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Nine months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,837 $ 1,924 $ 6,672 $ 839 $ 859 $ 433 $ 566 $ 969 $ 15,099 Provision (reversal) (306 ) 145 (606 ) 693 (9 ) (48 ) (81 ) 212 — Charge-offs (5 ) — — (839 ) — — (12 ) — (856 ) Recoveries 190 — 18 — 3 — 3 — 214 Ending balance $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 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 September 30, 2016 Ending ALLL related to loans collectively evaluated for impairment $ 2,925 $ 1,513 $ 5,851 $ 931 $ 918 $ 389 $ 270 $ 1,573 $ 14,370 Ending ALLL related to loans individually evaluated for impairment 569 108 474 5 34 59 94 — 1,343 Ending ALLL related to purchased credit-impaired loans — — — — — — — — — Total $ 3,494 $ 1,621 $ 6,325 $ 936 $ 952 $ 448 $ 364 $ 1,573 $ 15,713 Loans outstanding: Collectively evaluated for impairment $ 218,159 $ 229,316 $ 711,042 $ 77,253 $ 110,255 $ 75,795 $ 23,312 $ — $ 1,445,132 Individually evaluated for impairment 3,008 7,169 2,299 3,238 885 1,974 1,084 — 19,657 Purchased credit-impaired 40 1,053 1,710 — 71 — — — 2,874 Total $ 221,207 $ 237,538 $ 715,051 $ 80,491 $ 111,211 $ 77,769 $ 24,396 $ — $ 1,467,663 Ratio of allowance for loan losses to total loans 1.58 % 0.68 % 0.88 % 1.16 % 0.86 % 0.58 % 1.49 % NM 1.07 % Allowance for loan losses to non-accrual loans 7,941 % 921 % NM NM 366 % NM 607 % NM 2,910 % 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, 2015 Ending ALLL related to loans collectively evaluated for impairment $ 2,111 $ 2,179 $ 6,178 $ 723 $ 907 $ 327 $ 309 $ 1,096 $ 13,830 Ending ALLL related to loans individually evaluated for impairment 904 70 — — 3 67 116 — 1,160 Ending ALLL related to purchased credit-impaired loans 8 — — 1 — — — — 9 Total $ 3,023 $ 2,249 $ 6,178 $ 724 $ 910 $ 394 $ 425 $ 1,096 $ 14,999 Loans outstanding: Collectively evaluated for impairment $ 214,695 $ 233,605 $ 711,737 $ 62,256 $ 111,673 $ 71,143 $ 21,388 $ — $ 1,426,497 Individually evaluated for impairment 1 4,582 6,993 2,416 3,238 559 2,011 1,251 — 21,050 Purchased credit-impaired 175 1,711 1,726 1 68 — — — 3,681 Total $ 219,452 $ 242,309 $ 715,879 $ 65,495 $ 112,300 $ 73,154 $ 22,639 $ — $ 1,451,228 Ratio of allowance for loan losses to total loans 1.38 % 0.93 % 0.86 % 1.11 % 0.81 % 0.54 % 1.88 % NM 1.03 % Allowance for loan losses to non-accrual loans 14,395 % NM 325 % 72,400 % 532 % NM 512 % NM 688 % 1 Total excludes $138 thousand PCI loans as of December 31, 2015 that have experienced credit deterioration post-acquisition declines in cash flows expected to be collected. These loans are included in the "purchased credit-impaired" amount in the next line below. NM - Not Meaningful
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period	The following table presents the outstanding balances and related carrying values of PCI loans as of September 30, 2016 and December 31, 2015 . September 30, 2016 December 31, 2015 PCI Loans (in thousands) Unpaid principal balance Carrying value Unpaid principal balance Carrying value Commercial and industrial $ 47 $ 40 $ 237 $ 175 Commercial real estate 3,080 2,763 4,329 3,437 Construction — — 187 1 Home equity 220 71 224 68 Total purchased credit-impaired loans $ 3,347 $ 2,874 $ 4,977 $ 3,681
Accretable Yield Activity	The activities in the accretable yield, or income expected to be earned, for PCI loans were as follows: Accretable Yield Three months ended Nine months ended (in thousands) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Balance at beginning of period $ 1,655 $ 3,711 $ 2,618 $ 4,027 Removals 1 — (837 ) (778 ) (914 ) Accretion (89 ) (128 ) (274 ) (367 ) Reclassifications from nonaccretable difference 2 — — — — Balance at end of period $ 1,566 $ 2,746 $ 1,566 $ 2,746 1 Represents the accretable difference that is relieved when a loan exits the PCI population due to pay-off, full charge-off, or transfer to repossessed assets, etc. 2 Primarily relates to changes in expected credit performance and changes in expected timing of cash flows.

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following is a summary of the contractual terms of the subordinated debentures due to the Trusts as of September 30, 2016 : (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 (3.73% as of September 30, 2016), 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 (2.25% as of September 30, 2016), redeemable, in whole or in part, on any interest payment date 4,124 Total $ 8,248

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Dividends Declared	Presented below is a summary of cash dividends paid to common shareholders, recorded as a reduction of retained earnings. Three months ended Nine months ended (in thousands, except per share data) September 30, 2016 September 30, 2015 September 30, 2016 September 30, 2015 Cash dividends to common stockholders $ 1,528 $ 1,316 $ 4,573 $ 3,936 Cash dividends per common share $ 0.25 $ 0.22 $ 0.75 $ 0.66

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	At September 30, 2016 , the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows: (in thousands) 2016 2017 2018 2019 2020 Thereafter Total Operating leases 1 $ 903 $ 3,832 $ 3,898 $ 3,707 $ 3,385 $ 6,321 $ 22,046 1 Minimum payments have not been reduced by minimum sublease rentals of $175 thousand due in the future under non-cancelable subleases.

Derivative Financial Instrume24

Derivative Financial Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	Information on our derivatives follows: Asset derivatives Liability derivatives (in thousands) September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015 Fair value hedges: Interest rate contracts notional amount $ — $ 4,407 $ 19,928 $ 22,187 Interest rate contracts fair value 1 $ — $ 3 $ 2,480 $ 1,658
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	Three months ended (in thousands) September 30, 2016 September 30, 2015 Increase (decrease) in value of designated interest rate swaps recognized in interest income $ 241 $ (813 ) Payment on interest rate swaps recorded in interest income (132 ) (231 ) (Decrease) increase in value of hedged loans recognized in interest income (268 ) 905 Decrease in value of yield maintenance agreement recognized against interest income (67 ) (13 ) Net loss on derivatives recognized against interest income 2 $ (226 ) $ (152 ) Nine months ended (in thousands) September 30, 2016 September 30, 2015 Decrease in value of designated interest rate swaps recognized in interest income $ (825 ) $ (393 ) Payment on interest rate swaps recorded in interest income (445 ) (700 ) Increase in value of hedged loans recognized in interest income 1,022 453 Decrease in value of yield maintenance agreement recognized against interest income (90 ) (39 ) Net loss on derivatives recognized against interest income 2 $ (338 ) $ (679 ) 1 See Note 3 for valuation methodology. 2 Includes hedge ineffectiveness loss of $94 thousand and gain of $79 thousand for the quarters ended September 30, 2016 and September 30, 2015 , respectively. Ineffectiveness gains of $107 thousand and $21 thousand were recorded in interest income during the nine months ended September 30, 2016 and September 30, 2015 , respectively. Changes in value of swaps were included in the assessment of hedge effectiveness. Hedge ineffectiveness is the measure of the extent to which the change in the fair value of the hedging instruments does not exactly offset the change in the fair value of the hedged items from period to period.
Offsetting Assets	Information on financial instruments that are eligible for offset in the consolidated statements of condition follows: 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) Assets 1 Condition of Condition 1 Instruments Received Net Amount September 30, 2016 Derivatives by Counterparty: None $ — $ — $ — $ — $ — $ — December 31, 2015 Derivatives by Counterparty: Counterparty A $ 3 $ — $ 3 $ (3 ) $ — $ — 1 Amounts exclude accrued interest totaling zero and $1 thousand at September 30, 2016 and December 31, 2015 , respectively.
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) Liabilities 2 Condition of Condition 2 Instruments Pledged Net Amount September 30, 2016 Derivatives by Counterparty: Counterparty A $ 2,480 $ — $ 2,480 $ — $ (2,480 ) $ — December 31, 2015 Derivatives by Counterparty: Counterparty A $ 1,390 $ — $ 1,390 $ (3 ) $ (1,387 ) $ — Counterparty B 268 — 268 — (268 ) — Total $ 1,658 $ — $ 1,658 $ (3 ) $ (1,655 ) $ — 2 Amounts exclude accrued interest totaling $15 thousand and $27 thousand at September 30, 2016 and December 31, 2015 , respectively.

Basis of Presentation (Details)

Basis of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (shares)	6,083	5,963	6,070	5,943
Add: Potentially dilutive common shares related to stock options (shares)	27	35	30	41
Potential common shares related to unvested restricted stock (shares)	7	5	6	5
Potential common shares related to warrants (shares)	0	64	0	70
Weighted average diluted shares outstanding (shares)	6,117	6,067	6,106	6,059
Net income	$ 6,964	$ 4,773	$ 17,447	$ 13,516	$ 18,441
Basic EPS (usd per share)	$ 1.14	$ 0.80	$ 2.87	$ 2.27
Diluted EPS (usd per share)	$ 1.14	$ 0.79	$ 2.86	$ 2.23
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	71	42	65	35

Fair Value of Assets and Liab26

Fair Value of Assets and Liabilities - Recorded on a Recurring Basis (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)security	Dec. 31, 2015USD ($)security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	$ 378,996	$ 417,787
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
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities | security	1
Debentures of government sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	$ 40,576	$ 160,892
Privately-issued collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	560	4,150
Obligations of state and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	80,027	57,673
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	5,009	4,979
U.S. government agency obligation collateralized by loans guaranteed by SBA program
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Decrease in unrealized gain (loss) due to transfers to Level 3	15
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)		3
Derivative financial liabilities (interest rate contracts)	2,480	1,658
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
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)		3
Derivative financial liabilities (interest rate contracts)	2,480	1,658
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
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-sponsored agencies | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	252,824	190,093
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. 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, Fair Value	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-sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	252,199	188,381
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	625	1,712
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, Fair Value	40,576	160,892
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, Fair Value	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, Fair Value	40,576	160,892
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, Fair Value	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, Fair Value	560	4,150
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, Fair Value	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, Fair Value	560	4,150
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, Fair Value	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, Fair Value	80,027	57,673
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, Fair Value	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, Fair Value	80,027	57,673
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, Fair Value	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, Fair Value	5,009	4,979
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, Fair Value	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, Fair Value	5,009	4,979
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, Fair Value	$ 0	$ 0

Fair Value of Assets and Liab27

Fair Value of Assets and Liabilities - Recorded on Nonrecurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 19,657		$ 21,188
Specific valuation allowance for impaired loan	$ 1,343		1,169
Discount rate for selling costs applied to all properties	6.00%
Changed in estimated value of OREO	$ 13	$ 40
Financial instruments at fair value measured on a nonrecurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0
Other real estate owned	0		0
Financial instruments at fair value measured on a nonrecurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0
Other real estate owned	0		0
Financial instruments at fair value measured on a nonrecurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	124		0
Other real estate owned	408		421
Financial instruments at fair value measured on a nonrecurring basis | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	124		0
Other real estate owned	408		$ 421
Consumer Loan [Member] | Consumer loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	124
Specific valuation allowance for impaired loan	$ 52

Fair Value of Assets and Liab28

Fair Value of Assets and Liabilities - Fair Value of Financial Instruments (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)debenture	Dec. 31, 2015USD ($)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	$ 47,867	$ 71,054
Subordinated debenture
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Subordinated debentures	$ 4,950
Subordinated Debt [Abstract]
Number of subordinated debentures acquired | debenture	2
NorCal Community Bancorp Trust I | Subordinated debenture
Subordinated Debt [Abstract]
Basis spread on subordinated debentures	3.05%
NorCal Community Bancorp Trust II | Subordinated debenture
Subordinated Debt [Abstract]
Basis spread on subordinated debentures	1.40%
Carrying Value | Fair Value Hierarchy, Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	$ 96,930	26,343
Carrying Value | Fair Value Hierarchy, Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	46,423	69,637
Interest receivable	5,645	6,643
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Deposits	1,801,469	1,728,226
Federal Home Loan Bank borrowings	0	67,000
Interest payable	138	187
Carrying Value | Fair Value Hierarchy, Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans, net	1,451,950	1,436,229
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Subordinated debentures	5,540	5,395
Fair Value | Fair Value Hierarchy, Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	96,930	26,343
Fair Value | Fair Value Hierarchy, Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	47,867	71,054
Interest receivable	5,645	6,643
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Deposits	1,801,932	1,728,717
Federal Home Loan Bank borrowings	0	67,279
Interest payable	138	187
Fair Value | Fair Value Hierarchy, Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans, net	1,471,861	1,470,380
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Subordinated debentures	$ 5,156	$ 5,132

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	$ 46,423	$ 69,637
Held to maturity, Fair Value	47,867	71,054
Held-to-maturity, Gross Unrealized Gains	1,448	1,459
Held-to-maturity, Gross Unrealized Losses	(4)	(42)
Available-for-sale, Amortized Cost	374,802	417,410
Available-for-sale, Fair Value	378,996	417,787
Available-for-sale, Gross Unrealized Gains	4,523	1,883
Available-for-sale, Gross Unrealized Losses	(329)	(1,506)
Total investment securities, Amortized Cost	421,225	487,047
Total investment securities, Fair Value	426,863	488,841
Total investment securities, Gross Unrealized Gains	5,971	3,342
Total investment securities, Gross Unrealized Losses	(333)	(1,548)
MBS pass-through securities issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	196,987	138,222
Available-for-sale, Fair Value	198,999	138,462
Available-for-sale, Gross Unrealized Gains	2,239	694
Available-for-sale, Gross Unrealized Losses	(227)	(454)
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	14,885	18,266
Available-for-sale, Fair Value	15,104	18,219
Available-for-sale, Gross Unrealized Gains	219	97
Available-for-sale, Gross Unrealized Losses	0	(144)
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	30,555	22,889
Available-for-sale, Fair Value	30,887	22,932
Available-for-sale, Gross Unrealized Gains	332	82
Available-for-sale, Gross Unrealized Losses	0	(39)
CMOs issued by GNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	7,654	10,326
Available-for-sale, Fair Value	7,834	10,480
Available-for-sale, Gross Unrealized Gains	180	169
Available-for-sale, Gross Unrealized Losses	0	(15)
Debentures of government sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	40,486	161,690
Available-for-sale, Fair Value	40,576	160,892
Available-for-sale, Gross Unrealized Gains	98	28
Available-for-sale, Gross Unrealized Losses	(8)	(826)
Privately issued CMOs
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	560	3,960
Available-for-sale, Fair Value	560	4,150
Available-for-sale, Gross Unrealized Gains	1	190
Available-for-sale, Gross Unrealized Losses	(1)	0
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	78,719	57,110
Available-for-sale, Fair Value	80,027	57,673
Available-for-sale, Gross Unrealized Gains	1,401	580
Available-for-sale, Gross Unrealized Losses	(93)	(17)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	4,956	4,947
Available-for-sale, Fair Value	5,009	4,979
Available-for-sale, Gross Unrealized Gains	53	43
Available-for-sale, Gross Unrealized Losses	0	(11)
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	32,765	42,919
Held to maturity, Fair Value	33,868	44,146
Held-to-maturity, Gross Unrealized Gains	1,106	1,246
Held-to-maturity, Gross Unrealized Losses	(3)	(19)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	3,524	15,072
Held to maturity, Fair Value	3,523	15,098
Held-to-maturity, Gross Unrealized Gains	0	42
Held-to-maturity, Gross Unrealized Losses	(1)	(16)
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	10,134	11,646
Held to maturity, Fair Value	10,476	11,810
Held-to-maturity, Gross Unrealized Gains	342	171
Held-to-maturity, Gross Unrealized Losses	$ 0	$ (7)

Investment Securities - Maturit

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Held to Maturity, Amortized Cost, Within one year	$ 14,037	$ 18,853
Held to Maturity, Amortized Cost, After one but within five years	16,583	31,677
Held to Maturity, Amortized Cost, After five years through ten years	4,467	8,580
Held to Maturity, Amortized Cost, After ten years	11,336	10,527
Held to Maturity, Amortized Cost, Total	46,423	69,637
Available for Sale Securities, Amortized Cost, Within one year	17,067	12,135
Available for Sale, Amortized Cost, After one but within five years	67,087	188,007
Available for Sale, Amortized Cost, After five years through ten years	87,774	64,899
Available for Sale, Amortized Cost, After ten years	202,873	152,369
Available for Sale, Amortized Cost, Total	374,801	417,410
Held to Maturity, Fair Value, Within one year	14,115	18,920
Held to Maturity, Fair Value, After one but within five years	17,212	32,360
Held to Maturity, Fair Value, After five years through ten years	4,739	8,969
Held to Maturity, Fair Value, After ten years	11,801	10,805
Held to maturity, Fair Value	47,867	71,054
Available for Sale, Fair Value, Within one year	17,080	12,176
Available for Sale, Fair Value, After one but within five years	67,487	187,326
Available for Sale, Fair Value, After five years through ten years	88,871	64,999
Available for Sale, Fair Value, After ten years	205,558	153,286
Available for Sale, Fair Value, Total	$ 378,996	$ 417,787

Investment Securities - Securit

Investment Securities - Securities Sold and Pledged as Collateral (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Available-for-sale:
Sales proceeds	$ 0	$ 0	$ 68,673	$ 1,559
Gross realized gains	0	0	458	8
Gross realized losses	0	0	(64)	0
Held-to-maturity Securities, Sales, Excluding Other than Temporary Impairments [Abstract]
Sales proceeds	0	1,015	0	1,015
Gross realized gains	0	72	0	72
Gross realized losses	0	$ 0	0	$ 0
State of California
Available-for-sale:
Available-for-sale securities pledged as collateral	70,700		70,700		$ 87,900
Public Deposits
Available-for-sale:
Available-for-sale securities pledged as collateral	69,900		69,900		87,100
Trust Deposits
Available-for-sale:
Available-for-sale securities pledged as collateral	827		827		840
Internal checking account
Available-for-sale:
Available-for-sale securities pledged as collateral	$ 2,100		$ 2,100		$ 1,100

Investment Securities - Investm

Investment Securities - Investment Securities in Unrealized Loss Positions (Details) $ in Thousands	Sep. 30, 2016USD ($)security	Dec. 31, 2015USD ($)security
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Number of investment securities other-than-temporarily impaired | security	0
Number of investment securities in unrealized loss position | security	37	54
Held-to-maturity, less than 12 continuous months, Fair value	$ 4,070	$ 14,152
Held-to-maturity, less than 12 continuous months, Unrealized loss	(4)	(41)
Held-to-maturity, greater than 12 continuous months, Fair value	0	1,999
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	(1)
Held-to-maturity, Total Securities in a loss position, Fair value	4,070	16,151
Held-to-maturity, Gross Unrealized Losses	(4)	(42)
Available-for-sale, less than 12 continuous months, Fair value	98,619	221,857
Available-for-sale, less than 12 continuous months, Unrealized loss	(329)	(1,273)
Available-for-sale, greater than 12 continuous months, Fair value	0	17,987
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	(233)
Available-for-sale, Total Securities in a loss position, Fair Value	98,619	239,844
Available-for-sale, Total Securities in a loss position, Unrealized loss	(329)	(1,506)
Marketable securities, less than 12 continuous months, Fair value	102,689	236,009
Marketable securities, less than 12 continuous months, Unrealized loss	(333)	(1,314)
Marketable securities, greater than 12 continuous months, Fair value	0	19,986
Marketable securities, greater than 12 continuous months, Unrealized loss	0	(234)
Marketable securities, Total Securities in a loss position, Fair value	102,689	255,995
Marketable securities, Total Securities in a loss position, Unrealized loss	$ (333)	(1,548)
Number of investment securities in unrealized loss position less than 12 months | security	37
MBS pass-through securities issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value	$ 69,229	68,809
Available-for-sale, less than 12 continuous months, Unrealized loss	(227)	(454)
Available-for-sale, greater than 12 continuous months, Fair value	0	0
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	0
Available-for-sale, Total Securities in a loss position, Fair Value	69,229	68,809
Available-for-sale, Total Securities in a loss position, Unrealized loss	$ (227)	(454)
Number of investment securities in unrealized loss position less than 12 months | security	10
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value		9,277
Available-for-sale, less than 12 continuous months, Unrealized loss		(80)
Available-for-sale, greater than 12 continuous months, Fair value		3,158
Available-for-sale, greater than 12 continuous months, Unrealized loss		(64)
Available-for-sale, Total Securities in a loss position, Fair Value		12,435
Available-for-sale, Total Securities in a loss position, Unrealized loss		(144)
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value		0
Available-for-sale, less than 12 continuous months, Unrealized loss		0
Available-for-sale, greater than 12 continuous months, Fair value		1,989
Available-for-sale, greater than 12 continuous months, Unrealized loss		(39)
Available-for-sale, Total Securities in a loss position, Fair Value		1,989
Available-for-sale, Total Securities in a loss position, Unrealized loss		(39)
CMOs issued by GNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value		164
Available-for-sale, less than 12 continuous months, Unrealized loss		0
Available-for-sale, greater than 12 continuous months, Fair value		2,374
Available-for-sale, greater than 12 continuous months, Unrealized loss		(15)
Available-for-sale, Total Securities in a loss position, Fair Value		2,538
Available-for-sale, Total Securities in a loss position, Unrealized loss		(15)
Debentures of government- sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value	$ 14,992	136,064
Available-for-sale, less than 12 continuous months, Unrealized loss	(8)	(713)
Available-for-sale, greater than 12 continuous months, Fair value	0	9,887
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	(113)
Available-for-sale, Total Securities in a loss position, Fair Value	14,992	145,951
Available-for-sale, Total Securities in a loss position, Unrealized loss	$ (8)	(826)
Number of investment securities in unrealized loss position less than 12 months | security	2
Privately issued CMOs
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value	$ 162
Available-for-sale, less than 12 continuous months, Unrealized loss	(1)
Available-for-sale, greater than 12 continuous months, Fair value	0
Available-for-sale, greater than 12 continuous months, Unrealized loss	0
Available-for-sale, Total Securities in a loss position, Fair Value	162
Available-for-sale, Total Securities in a loss position, Unrealized loss	$ (1)
Number of investment securities in unrealized loss position less than 12 months | security	1
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value	$ 14,236	4,557
Available-for-sale, less than 12 continuous months, Unrealized loss	(93)	(15)
Available-for-sale, greater than 12 continuous months, Fair value	0	579
Available-for-sale, greater than 12 continuous months, Unrealized loss	0	(2)
Available-for-sale, Total Securities in a loss position, Fair Value	14,236	5,136
Available-for-sale, Total Securities in a loss position, Unrealized loss	$ (93)	(17)
Number of investment securities in unrealized loss position less than 12 months | security	23
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, less than 12 continuous months, Fair value		2,986
Available-for-sale, less than 12 continuous months, Unrealized loss		(11)
Available-for-sale, greater than 12 continuous months, Fair value		0
Available-for-sale, greater than 12 continuous months, Unrealized loss		0
Available-for-sale, Total Securities in a loss position, Fair Value		2,986
Available-for-sale, Total Securities in a loss position, Unrealized loss		(11)
Number of investment securities in unrealized loss position less than 12 months | security	1
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held-to-maturity, less than 12 continuous months, Fair value	$ 547	8,297
Held-to-maturity, less than 12 continuous months, Unrealized loss	(3)	(19)
Held-to-maturity, greater than 12 continuous months, Fair value	0	0
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	0
Held-to-maturity, Total Securities in a loss position, Fair value	547	8,297
Held-to-maturity, Gross Unrealized Losses	(3)	(19)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held-to-maturity, less than 12 continuous months, Fair value	3,523	3,523
Held-to-maturity, less than 12 continuous months, Unrealized loss	(1)	(15)
Held-to-maturity, greater than 12 continuous months, Fair value	0	1,999
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	(1)
Held-to-maturity, Total Securities in a loss position, Fair value	3,523	5,522
Held-to-maturity, Gross Unrealized Losses	$ (1)	(16)
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, less than 12 continuous months, Fair value		2,332
Held-to-maturity, less than 12 continuous months, Unrealized loss		(7)
Held-to-maturity, greater than 12 continuous months, Fair value		0
Held-to-maturity, greater than 12 continuous months, Unrealized loss		0
Held-to-maturity, Total Securities in a loss position, Fair value		2,332
Held-to-maturity, Gross Unrealized Losses		$ (7)

Investment Securities - Non-Mar

Investment Securities - Non-Marketable Securities (Details)	Oct. 21, 2016$ / shares	Oct. 19, 2016$ / shares	Sep. 30, 2016USD ($)$ / sharesshares	Jul. 28, 2016	Dec. 31, 2015USD ($)
Schedule of Cost-method Investments [Line Items]
Federal Home Loan Bank stock, par value (usd per share) | $ / shares			$ 100
Federal Home Loan Bank, dividend rate percentage				8.94%
Investments in low income housing tax credit funds			$ 2,500,000		$ 2,700,000
Low income housing tax credits and other tax benefits			223,000
Low income housing amortization expense			177,000
Unfunded commitments for low income housing tax credit funds			$ 1,500,000
Visa Inc. Class B common stock
Schedule of Cost-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			$ 2,300,000		2,200,000
Visa Inc. | Visa Inc. Class B common stock
Schedule of Cost-method Investments [Line Items]
Conversion rate on common stock			1.6483
Subsequent event
Schedule of Cost-method Investments [Line Items]
Special cash dividend declared on capital stock outstanding (usd per share) | $ / shares	$ 0.27
Subsequent event | Federal Home Loan Bank
Schedule of Cost-method Investments [Line Items]
Special cash dividend declared on capital stock outstanding (usd per share) | $ / shares		$ 3.41
Other assets
Schedule of Cost-method Investments [Line Items]
Federal Home Loan Bank stock			$ 10,200,000		$ 8,400,000

Loans and Allowance for Loan 34

Loans and Allowance for Loan Losses - Loans Outstanding and Aging Analysis (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 629,000	$ 2,224,000
Current	1,467,034,000	1,449,004,000
Total loans	1,467,663,000	1,451,228,000
Purchased Credit Impaired (PCI) loans no longer accreting interest		1,000
Purchased Credit-impaired (PCI) loans accreting interest	2,900,000	3,700,000
Loans past due more than 90 days still accruing	0	0
Deferred loan fees	869,000	768,000
Unaccreted purchase discounts on non-PCI loans	1,900,000	3,200,000
Non-accrual	540,000	2,179,000
30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	310,000	1,382,000
60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	722,000
90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	319,000	120,000
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	46,000	57,000
Current	221,161,000	219,395,000
Total loans	221,207,000	219,452,000
Non-accrual	44,000	21,000
Commercial loans | Commercial and industrial | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	2,000	36,000
Commercial loans | Commercial and industrial | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial loans | Commercial and industrial | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	44,000	21,000
Commercial real estate loans | Commercial real estate, owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	311,000	0
Current	237,227,000	242,309,000
Total loans	237,538,000	242,309,000
Non-accrual	176,000	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	135,000	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	176,000	0
Commercial real estate loans | Commercial real estate, investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	1,096,000
Current	715,051,000	714,783,000
Total loans	715,051,000	715,879,000
Non-accrual	0	1,903,000
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	1,096,000
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	1,000
Current	80,491,000	65,494,000
Total loans	80,491,000	65,495,000
Non-accrual	0	1,000
Commercial real estate loans | Construction | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	1,000
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	189,000	732,000
Current	111,022,000	111,568,000
Total loans	111,211,000	112,300,000
Non-accrual	260,000	171,000
Residential loans | Home equity | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	90,000	0
Residential loans | Home equity | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	633,000
Residential loans | Home equity | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	99,000	99,000
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Current	77,769,000	73,154,000
Total loans	77,769,000	73,154,000
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	0
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	83,000	338,000
Current	24,313,000	22,301,000
Total loans	24,396,000	22,639,000
Non-accrual	60,000	83,000
Consumer loans | Installment and other consumer | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	83,000	249,000
Consumer loans | Installment and other consumer | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	89,000
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

Loans and Allowance for Loan 35

Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,467,663	$ 1,451,228
Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	2,874	3,681
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,430,258	1,392,597
Pass | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	2,874	3,260
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,813	36,300
Special Mention | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,592	22,331
Substandard | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	421
Commercial loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	221,167	219,277
Total loans	221,207	219,452
Commercial loans | Commercial and industrial | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	40	175
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	203,784	192,560
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	8,859	22,457
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	8,524	4,260
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	236,485	240,598
Total loans	237,538	242,309
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,053	1,711
Commercial real estate loans | Commercial real estate, owner-occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	224,502	219,060
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	4,478	12,371
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	7,505	9,167
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	713,341	714,153
Total loans	715,051	715,879
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,710	1,726
Commercial real estate loans | Commercial real estate, investor | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	711,192	710,042
Commercial real estate loans | Commercial real estate, investor | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	356	372
Commercial real estate loans | Commercial real estate, investor | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,793	3,739
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	80,491	65,494
Total loans	80,491	65,495
Commercial real estate loans | Construction | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	1
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	77,253	62,255
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	3,238	3,239
Residential loans | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	111,140	112,232
Total loans	111,211	112,300
Residential loans | Home equity | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	71	68
Residential loans | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	108,908	109,959
Residential loans | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,120	1,100
Residential loans | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,112	1,173
Residential loans | Other residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	77,769	73,154
Residential loans | Other residential | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	0
Residential loans | Other residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	77,769	73,154
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	24,396	22,639
Consumer loans | Installment and other consumer | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	0
Consumer loans | Installment and other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,976	22,307
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	$ 420	$ 332

Loans and Allowance for Loan 36

Loans and Allowance for Loan Losses - Troubled Debt Restructuring by Class (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2015USD ($)loans	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)loans	Sep. 30, 2015USD ($)loans	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans removed from TDR designation | loans				0	4
Loans removed from TDR designation, recorded investment					$ 1,400,000
Recorded investment in Troubled Debt Restructurings		$ 19,188,000		$ 19,188,000		$ 19,081,000
TDR loans accruing interest as of period end		19,100,000		19,100,000		19,000,000
TDR loans acquired		0		0		137,000
Number of loans transferred to loans held-for-sale | loans	1
Charge-off on loan transferred to held-for-sale		0	$ 3,000	13,000	856,000
Gain (loss) on transfer of loans to held-for-sale	$ 0
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		2,964,000		2,964,000		4,698,000
Charge-off on loan transferred to held-for-sale		0	2,000	9,000	5,000
Commercial real estate loans | Commercial real estate, owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		6,993,000		6,993,000		6,993,000
Charge-off on loan transferred to held-for-sale		0	0	0	0
Commercial real estate loans | Commercial real estate, investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		2,299,000		2,299,000		514,000
Charge-off on loan transferred to held-for-sale		0	0	0	0
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		3,238,000		3,238,000		3,238,000
Loans reclassified to held-for-sale	1,500,000
Charge-off on loan transferred to held-for-sale	$ 839,000	0	0	0	839,000
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		696,000		696,000		460,000
Charge-off on loan transferred to held-for-sale		0	0	0	0
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		1,974,000		1,974,000		2,010,000
Charge-off on loan transferred to held-for-sale		0	0	0	0
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		1,024,000		1,024,000		$ 1,168,000
Charge-off on loan transferred to held-for-sale		$ 0	$ 1,000	$ 4,000	$ 12,000

Loans and Allowance for Loan 37

Loans and Allowance for Loan Losses - Troubled Debt Restructuring Modifications (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)contract	Sep. 30, 2015USD ($)contract	Sep. 30, 2016USD ($)loanscontract	Sep. 30, 2015USD ($)loanscontract
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract	0	1	3	6
Pre-Modification Outstanding Recorded Investment	$ 0	$ 700	$ 1,917	$ 1,704
Post-Modification Outstanding Recorded Investment	0	700	2,048	1,803
Post-Modification Outstanding Recorded Investment at Period End	$ 0	$ 700	$ 2,030	$ 1,680
Number of modified TDR loans that defaulted | loans			0	0
Commercial loans | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract				5
Pre-Modification Outstanding Recorded Investment				$ 1,482
Post-Modification Outstanding Recorded Investment				1,582
Post-Modification Outstanding Recorded Investment at Period End				$ 1,463
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract			2	1
Pre-Modification Outstanding Recorded Investment			$ 1,830	$ 222
Post-Modification Outstanding Recorded Investment			1,826	221
Post-Modification Outstanding Recorded Investment at Period End			$ 1,808	$ 217
Residential loans | Home equity
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract			1
Pre-Modification Outstanding Recorded Investment			$ 87
Post-Modification Outstanding Recorded Investment			222
Post-Modification Outstanding Recorded Investment at Period End			$ 222

Loans and Allowance for Loan 38

Loans and Allowance for Loan Losses - Impaired Loans and Related Allowance (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Recorded investment in impaired loans:
With no specific allowance recorded	$ 5,347,000		$ 5,347,000		$ 12,928,000
With a specific allowance recorded	14,310,000		14,310,000		8,260,000
Total recorded investment in impaired loans	19,657,000		19,657,000		21,188,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	19,657,000		19,657,000		23,409,000
Specific valuation	1,343,000		1,343,000		1,169,000
Average recorded investment in impaired loans during the period	21,139,000	$ 22,390,000	21,788,000	$ 23,921,000
Interest income recognized on impaired loans during the period ended	1,600,000	217,000	2,021,000	602,000
Interest income recognized on impaired loans during the period ended, cash basis	1,400,000	0	1,400,000	0
Charged-off portion of impaired loans					2,100,000
Outstanding commitments to extend credit on impaired loans	1,300,000		1,300,000
Commercial loans | Commercial and industrial
Recorded investment in impaired loans:
With no specific allowance recorded	1,102,000		1,102,000		2,198,000
With a specific allowance recorded	1,906,000		1,906,000		2,522,000
Total recorded investment in impaired loans	3,008,000		3,008,000		4,720,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	3,008,000		3,008,000		4,763,000
Specific valuation	569,000		569,000		912,000
Average recorded investment in impaired loans during the period	3,352,000	4,473,000	3,802,000	4,121,000
Interest income recognized on impaired loans during the period ended	44,000	58,000	142,000	176,000
Commercial real estate loans | Commercial real estate, owner-occupied
Recorded investment in impaired loans:
With no specific allowance recorded	0		0		4,111,000
With a specific allowance recorded	7,169,000		7,169,000		2,882,000
Total recorded investment in impaired loans	7,169,000		7,169,000		6,993,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	7,169,000		7,169,000		6,993,000
Specific valuation	108,000		108,000		70,000
Average recorded investment in impaired loans during the period	7,169,000	7,695,000	7,081,000	8,183,000
Interest income recognized on impaired loans during the period ended	67,000	84,000	133,000	228,000
Commercial real estate loans | Commercial real estate, investor
Recorded investment in impaired loans:
With no specific allowance recorded	0		0		2,416,000
With a specific allowance recorded	2,299,000		2,299,000		0
Total recorded investment in impaired loans	2,299,000		2,299,000		2,416,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	2,299,000		2,299,000		4,408,000
Specific valuation	474,000		474,000		0
Average recorded investment in impaired loans during the period	3,146,000	2,886,000	3,397,000	2,916,000
Interest income recognized on impaired loans during the period ended	1,385,000	10,000	1,489,000	24,000
Commercial real estate loans | Construction
Recorded investment in impaired loans:
With no specific allowance recorded	2,688,000		2,688,000		2,687,000
With a specific allowance recorded	550,000		550,000		551,000
Total recorded investment in impaired loans	3,238,000		3,238,000		3,238,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	3,238,000		3,238,000		3,424,000
Specific valuation	5,000		5,000		1,000
Average recorded investment in impaired loans during the period	3,238,000	3,262,000	3,238,000	4,473,000
Interest income recognized on impaired loans during the period ended	32,000	22,000	105,000	40,000
Residential loans | Home equity
Recorded investment in impaired loans:
With no specific allowance recorded	260,000		260,000		171,000
With a specific allowance recorded	625,000		625,000		388,000
Total recorded investment in impaired loans	885,000		885,000		559,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	885,000		885,000		559,000
Specific valuation	34,000		34,000		3,000
Average recorded investment in impaired loans during the period	1,140,000	610,000	1,098,000	616,000
Interest income recognized on impaired loans during the period ended	38,000	5,000	48,000	14,000
Residential loans | Other residential
Recorded investment in impaired loans:
With no specific allowance recorded	1,189,000		1,189,000		1,214,000
With a specific allowance recorded	785,000		785,000		797,000
Total recorded investment in impaired loans	1,974,000		1,974,000		2,011,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	1,974,000		1,974,000		2,011,000
Specific valuation	59,000		59,000		67,000
Average recorded investment in impaired loans during the period	1,981,000	2,025,000	1,993,000	2,033,000
Interest income recognized on impaired loans during the period ended	22,000	23,000	67,000	69,000
Consumer loans | Installment and other consumer
Recorded investment in impaired loans:
With no specific allowance recorded	108,000		108,000		131,000
With a specific allowance recorded	976,000		976,000		1,120,000
Total recorded investment in impaired loans	1,084,000		1,084,000		1,251,000
Unpaid principal balance of impaired loans:
Total unpaid principal balance of impaired loans	1,084,000		1,084,000		1,251,000
Specific valuation	94,000		94,000		$ 116,000
Average recorded investment in impaired loans during the period	1,113,000	1,439,000	1,179,000	1,579,000
Interest income recognized on impaired loans during the period ended	$ 12,000	$ 15,000	$ 37,000	$ 51,000

Loans and Allowance for Loan 39

Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		$ 15,087	$ 14,354	$ 14,999	$ 15,099
(Reversal of) provision for loan losses		(1,550)	0	(1,550)	0
Charge-offs		0	(3)	(13)	(856)
Recoveries		2,176	106	2,277	214
Ending balance	$ 14,354	15,713	14,457	15,713	14,457
Ending ALLL related to loans collectively evaluated for impairment		14,370		14,370		$ 13,830
Ending ALLL related to loans individually evaluated for impairment		1,343		1,343		1,160
Ending ALLL related to purchased credit-impaired loans		15,713		15,713		14,999
Collectively evaluated for impairment		1,445,132		1,445,132		1,426,497
Individually evaluated for impairment		19,657		19,657		21,050
Total loans		$ 1,467,663		$ 1,467,663		$ 1,451,228
Ratio of allowance for loan losses to total loans		1.07%		1.07%		1.03%
Allowance for loan losses to non-accrual loans		2910.00%		2910.00%		688.00%
PCI loans impaired post-acquisition						$ 138
Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		9
Purchase credit-impaired		2,874		2,874		3,681
Commercial loans | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		2,637	2,540	3,023	2,837
(Reversal of) provision for loan losses		828	86	388	(306)
Charge-offs		0	(2)	(9)	(5)
Recoveries		29	92	92	190
Ending balance	2,540	3,494	2,716	3,494	2,716
Ending ALLL related to loans collectively evaluated for impairment		2,925		2,925		2,111
Ending ALLL related to loans individually evaluated for impairment		569		569		904
Ending ALLL related to purchased credit-impaired loans		3,494		3,494		3,023
Collectively evaluated for impairment		218,159		218,159		214,695
Individually evaluated for impairment		3,008		3,008		4,582
Total loans		$ 221,207		$ 221,207		$ 219,452
Ratio of allowance for loan losses to total loans		1.58%		1.58%		1.38%
Allowance for loan losses to non-accrual loans		7941.00%		7941.00%		14395.00%
Commercial loans | Commercial and industrial | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 8
Purchase credit-impaired		40		40		175
Commercial real estate loans | Commercial real estate, owner-occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		1,631	2,052	2,249	1,924
(Reversal of) provision for loan losses		(10)	17	(628)	145
Charge-offs		0	0	0	0
Recoveries		0	0	0	0
Ending balance	2,052	1,621	2,069	1,621	2,069
Ending ALLL related to loans collectively evaluated for impairment		1,513		1,513		2,179
Ending ALLL related to loans individually evaluated for impairment		108		108		70
Ending ALLL related to purchased credit-impaired loans		1,621		1,621		2,249
Collectively evaluated for impairment		229,316		229,316		233,605
Individually evaluated for impairment		7,169		7,169		6,993
Total loans		$ 237,538		$ 237,538		$ 242,309
Ratio of allowance for loan losses to total loans		0.68%		0.68%		0.93%
Allowance for loan losses to non-accrual loans		921.00%		921.00%
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 0
Purchase credit-impaired		1,053		1,053		1,711
Commercial real estate loans | Commercial real estate, investor
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		6,595	5,944	6,178	6,672
(Reversal of) provision for loan losses		(2,416)	128	(2,009)	(606)
Charge-offs		0	0	0	0
Recoveries		2,146	12	2,156	18
Ending balance	5,944	6,325	6,084	6,325	6,084
Ending ALLL related to loans collectively evaluated for impairment		5,851		5,851		6,178
Ending ALLL related to loans individually evaluated for impairment		474		474		0
Ending ALLL related to purchased credit-impaired loans		6,325		6,325		6,178
Collectively evaluated for impairment		711,042		711,042		711,737
Individually evaluated for impairment		2,299		2,299		2,416
Total loans		$ 715,051		$ 715,051		$ 715,879
Ratio of allowance for loan losses to total loans		0.88%		0.88%		0.86%
Allowance for loan losses to non-accrual loans						325.00%
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 0
Purchase credit-impaired		1,710		1,710		1,726
Commercial real estate loans | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		831	535	724	839
(Reversal of) provision for loan losses		105	158	212	693
Charge-offs	(839)	0	0	0	(839)
Recoveries		0	0	0	0
Ending balance	535	936	693	936	693
Ending ALLL related to loans collectively evaluated for impairment		931		931		723
Ending ALLL related to loans individually evaluated for impairment		5		5		0
Ending ALLL related to purchased credit-impaired loans		936		936		724
Collectively evaluated for impairment		77,253		77,253		62,256
Individually evaluated for impairment		3,238		3,238		3,238
Total loans		$ 80,491		$ 80,491		$ 65,495
Ratio of allowance for loan losses to total loans		1.16%		1.16%		1.11%
Allowance for loan losses to non-accrual loans						72400.00%
Commercial real estate loans | Construction | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 1
Purchase credit-impaired		0		0		1
Residential loans | Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		1,076	843	910	859
(Reversal of) provision for loan losses		(125)	9	40	(9)
Charge-offs		0	0	0	0
Recoveries		1	1	2	3
Ending balance	843	952	853	952	853
Ending ALLL related to loans collectively evaluated for impairment		918		918		907
Ending ALLL related to loans individually evaluated for impairment		34		34		3
Ending ALLL related to purchased credit-impaired loans		952		952		910
Collectively evaluated for impairment		110,255		110,255		111,673
Individually evaluated for impairment		885		885		559
Total loans		$ 111,211		$ 111,211		$ 112,300
Ratio of allowance for loan losses to total loans		0.86%		0.86%		0.81%
Allowance for loan losses to non-accrual loans		366.00%		366.00%		532.00%
Residential loans | Home equity | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 0
Purchase credit-impaired		71		71		68
Residential loans | Other residential
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		426	435	394	433
(Reversal of) provision for loan losses		22	(50)	54	(48)
Charge-offs		0	0	0	0
Recoveries		0	0	0	0
Ending balance	435	448	385	448	385
Ending ALLL related to loans collectively evaluated for impairment		389		389		327
Ending ALLL related to loans individually evaluated for impairment		59		59		67
Ending ALLL related to purchased credit-impaired loans		448		448		394
Collectively evaluated for impairment		75,795		75,795		71,143
Individually evaluated for impairment		1,974		1,974		2,011
Total loans		$ 77,769		$ 77,769		$ 73,154
Ratio of allowance for loan losses to total loans		0.58%		0.58%		0.54%
Residential loans | Other residential | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 0
Purchase credit-impaired		0		0		0
Consumer loans | Installment and other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		437	444	425	566
(Reversal of) provision for loan losses		(73)	32	(84)	(81)
Charge-offs		0	(1)	(4)	(12)
Recoveries		0	1	27	3
Ending balance	444	364	476	364	476
Ending ALLL related to loans collectively evaluated for impairment		270		270		309
Ending ALLL related to loans individually evaluated for impairment		94		94		116
Ending ALLL related to purchased credit-impaired loans		364		364		425
Collectively evaluated for impairment		23,312		23,312		21,388
Individually evaluated for impairment		1,084		1,084		1,251
Total loans		$ 24,396		$ 24,396		$ 22,639
Ratio of allowance for loan losses to total loans		1.49%		1.49%		1.88%
Allowance for loan losses to non-accrual loans		607.00%		607.00%		512.00%
Consumer loans | Installment and other consumer | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 0		$ 0		$ 0
Purchase credit-impaired		0		0		0
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		1,454	1,561	1,096	969
(Reversal of) provision for loan losses		119	(380)	477	212
Charge-offs		0	0	0	0
Recoveries		0	0	0	0
Ending balance	$ 1,561	1,573	$ 1,181	1,573	$ 1,181
Ending ALLL related to loans collectively evaluated for impairment		1,573		1,573		1,096
Ending ALLL related to loans individually evaluated for impairment		0		0		0
Ending ALLL related to purchased credit-impaired loans		1,573		1,573		1,096
Collectively evaluated for impairment		0		0		0
Individually evaluated for impairment		0		0		0
Total loans		0		0		0
Unallocated | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		0		0		0
Purchase credit-impaired		$ 0		$ 0		$ 0

Loans and Allowance for Loan 40

Loans and Allowance for Loan Losses - Purchased Credit-Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	$ 3,347		$ 3,347		$ 4,977
Carrying value	2,874		2,874		3,681
Accretable Yield [Roll Forward]
Balance at beginning of period	1,655	$ 3,711	2,618	$ 4,027
Removals	0	(837)	(778)	(914)
Accretion	(89)	(128)	(274)	(367)
Reclassifications from nonaccretable difference	0	0	0	0
Balance at end of period	1,566	$ 2,746	1,566	$ 2,746
Commercial loans | Commercial and industrial
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	47		47		237
Carrying value	40		40		175
Commercial real estate loans
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	3,080		3,080		4,329
Carrying value	2,763		2,763		3,437
Commercial real estate loans | Construction
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	0		0		187
Carrying value	0		0		1
Residential loans | Home equity
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	220		220		224
Carrying value	$ 71		$ 71		$ 68

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses - Pledged Loans (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Financial Instruments Owned and Pledged as Collateral [Line Items]
Residential loans pledged for FRB borrowings	$ 863.2	$ 833.8
Other residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged residential loan portfolio to secure borrowing with FRB	$ 48.7	$ 45.2

Borrowings - Lines of Credit (D

Borrowings - Lines of Credit (Details) - Line of credit - USD ($)	Jun. 15, 2016	Feb. 05, 2008	Sep. 30, 2016	Dec. 31, 2015
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			487,600,000	470,600,000
Term of FHLB borrowing agreements		10 years
Principal amount of borrowing agreements with FHLB		$ 15,000,000
Fixed interest rate of FHLB borrowing agreement		2.07%
Amount of debt repaid early	$ 15,000,000
Prepayment fee	$ 312,000
Remaining available line of credit from FHLB			487,600,000	403,400,000
Federal Home Loan Bank Overnight Borrowings
Line of Credit Facility [Line Items]
Amount of borrowings outstanding			0	52,000,000
Federal Reserve Line of Credit
Line of Credit Facility [Line Items]
Lines of credit			38,800,000	37,800,000
Amount of borrowings outstanding			0	0
Unsecured Debt | Federal Funds Purchased
Line of Credit Facility [Line Items]
Lines of credit			$ 92,000,000	$ 92,000,000

Borrowings - Subordinated Debt

Borrowings - Subordinated Debt (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)debenture	Sep. 30, 2015USD ($)
Debt Instrument [Line Items]
Accretion of discount on subordinated debentures	$ 145	$ 158
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	$ 145	$ 158
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	3.73%
Basis spread on subordinated debentures	3.05%
Subordinated debenture | NorCal Community Bancorp Trust II
Debt Instrument [Line Items]
Contractual value of subordinated debt	$ 4,124
Effective interest rate	2.25%
Basis spread on subordinated debentures	1.40%

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	Oct. 21, 2016$ / shares	Sep. 30, 2015$ / sharesshares	Nov. 30, 2011investor	Sep. 30, 2016USD ($)$ / shares	Sep. 30, 2015USD ($)$ / sharesshares	Sep. 30, 2016USD ($)$ / shares	Sep. 30, 2015USD ($)$ / sharesshares	Dec. 31, 2015USD ($)
Class of Stock [Line Items]
Number of institutional investors that purchased warrant | investor			2
Cash dividends to common stockholders | $				$ 1,528	$ 1,316	$ 4,573	$ 3,936	$ 5,390
Cash dividends paid per common share (usd per share)				$ 0.25	$ 0.22	$ 0.75	$ 0.66
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%
Subsequent event
Class of Stock [Line Items]
Dividends declared per common share (usd per share)	$ 0.27
Common stock
Class of Stock [Line Items]
Number of common stock shares authorized to be purchased by warrant (in shares) | shares		157,711			157,711		157,711
Exercise price of warrant to purchase common stock (usd per share)		$ 26.63			$ 26.63		$ 26.63
Net issuance of shares of common stock from cashless exercise (in shares) | shares		70,591
U.S. Treasury Capital Purchase Program (TCPP) | Common stock
Class of Stock [Line Items]
Number of common stock shares authorized to be purchased by warrant (in shares) | shares		154,242			154,242		154,242
Exercise price of warrant to purchase common stock (usd per share)		$ 27.23			$ 27.23		$ 27.23

Commitments and Contingencies45

Commitments and Contingencies (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Operating Leases
2,016		$ 903
2,017		3,832
2,018		3,898
2,019		3,707
2,020		3,385
Thereafter		6,321
Total		22,046
Minimum payments due on minimum sublease rentals under non-cancelable subleases		175
Rent expense		2,800	$ 3,200
Visa Inc.
Litigation Matters
Balance of escrow account for legal settlements	$ 1,000,000
Visa Inc. | Pending due to reversal
Litigation Matters
Class settlement agreement amount, reversed by appellate court	$ 4,000,000
Loan commitments and standby letters of credit, unused
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		416,500		$ 376,600
Loan commitments and standby letters of credit, unused | Interest payable and other liabilities
Loss Contingencies [Line Items]
Allowance for off balance sheet commitments		899		$ 749
Commercial lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		212,600
Revolving home equity lines
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		149,000
Undisbursed construction loans
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		40,700
Standby letters of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		3,500
Personal and other lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		$ 10,700

Derivative Financial Instrume46

Derivative Financial Instruments and Hedging Activities - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2016derivative	Sep. 30, 2016USD ($)derivative	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)derivative	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Derivatives, Fair Value [Line Items]
Number of derivative instruments terminated | derivative	1
Fair value hedge
Derivatives, Fair Value [Line Items]
Net hedge ineffectiveness gain (loss), derivatives		$ (94)	$ 79	$ 107	$ 21
Fair value hedge | Interest income
Derivatives, Fair Value [Line Items]
Increase (decrease) in value of designated interest rate swaps recognized in interest income		241	(813)	(825)	(393)
Payment on interest rate swaps recorded in interest income		(132)	(231)	(445)	(700)
(Decrease) increase in value of hedged loans recognized in interest income		(268)	905	1,022	453
Decrease in value of yield maintenance agreement recognized against interest income		(67)	(13)	(90)	(39)
Net loss on derivatives recognized against interest income		(226)	$ (152)	(338)	$ (679)
Designated as hedging instrument | Fair value hedge
Derivatives, Fair Value [Line Items]
Accrued interest on swaps		$ 15		$ 15		$ 28
Interest rate swap | Designated as hedging instrument | Fair value hedge
Derivatives, Fair Value [Line Items]
Number of derivative instruments | derivative		5		5
Interest rate swap | Designated as hedging instrument | Fair value hedge | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Asset derivatives		$ 0		$ 0		4,407
Interest rate swap | Designated as hedging instrument | Fair value hedge | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Liability derivatives		19,928		19,928		22,187
Interest rate contract | Designated as hedging instrument | Fair value hedge | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Asset derivatives		0		0		3
Interest rate contract | Designated as hedging instrument | Fair value hedge | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Liability derivatives		$ 2,480		$ 2,480		$ 1,658

Derivative Financial Instrume47

Derivative Financial Instruments and Hedging Activities - Offsetting of Assets (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 0
Gross Amounts Offset in the Statements of Condition	0
Net Amounts of Assets Presented in the Statements of Condition	0
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0
Net Amount	0
Interest rate swap | Other assets
Offsetting Assets [Line Items]
Accrued interest on derivative asset interest rate swaps	$ 0	$ 1,000
Counterparty A
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		3,000
Gross Amounts Offset in the Statements of Condition		0
Net Amounts of Assets Presented in the Statements of Condition		3,000
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments		(3,000)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received		0
Net Amount		$ 0

Derivative Financial Instrume48

Derivative Financial Instruments and Hedging Activities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		$ 1,658
Gross Amounts Offset in the Statements of Condition		0
Net Amounts of Liabilities Presented in the Statements of Condition		1,658
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments		(3)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged		(1,655)
Net Amount		0
Interest rate swap | Other liabilities
Offsetting Liabilities [Line Items]
Accrued interest on derivative liability interest swaps	$ 15	27
Counterparty A
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	2,480	1,390
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	2,480	1,390
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(3)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(2,480)	(1,387)
Net Amount	$ 0	0
Counterparty B
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		268
Gross Amounts Offset in the Statements of Condition		0
Net Amounts of Liabilities Presented in the Statements of Condition		268
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments		0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged		(268)
Net Amount		$ 0