Bank of Marin Bancorp (BMRC) 10-Q 9 Nov 15 2015 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 31, 2015
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, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		6,062,407

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 35,315	$ 41,367
Investment securities
Held-to-maturity, at amortized cost	86,471	116,437
Available-for-sale, at fair value (amortized cost $331,024 and $199,045 at September 30, 2015 and December 31, 2014, respectively)	333,856	200,848
Total investment securities	420,327	317,285
Loans, net of allowance for loan losses of $14,457 and $15,099 at September 30, 2015 and December 31, 2014, respectively	1,348,743	1,348,252
Bank premises and equipment, net	9,537	9,859
Goodwill	6,436	6,436
Core deposit intangible	3,268	3,732
Interest receivable and other assets	59,168	60,199
Total assets	1,882,794	1,787,130
Deposits
Non-interest-bearing	752,336	670,890
Interest-bearing
Transaction accounts	95,522	93,758
Savings accounts	136,021	133,714
Money market accounts	495,642	503,543
Time accounts	155,961	149,714
Total deposits	1,635,482	1,551,619
Federal Home Loan Bank (FHLB) borrowings	15,000	15,000
Subordinated debentures	5,343	5,185
Interest payable and other liabilities	15,015	15,300
Total liabilities	1,670,840	1,587,104
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 - 6,060,744 and 5,939,482 at September 30, 2015 and December 31, 2014, respectively	84,272	82,436
Retained earnings	126,082	116,502
Accumulated other comprehensive income, net	1,600	1,088
Total stockholders' equity	211,954	200,026
Total liabilities and stockholders' equity	$ 1,882,794	$ 1,787,130

CONSOLIDATED STATEMENTS OF CON3

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment Securities
Available-for-sale, amortized cost	$ 331,024	$ 199,045
Loans, allowance for loan losses	$ 14,457	$ 15,099
Stockholders' Equity
Preferred stock, no par value	$ 0	$ 0
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued	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)	6,060,744	5,939,482
Common stock, outstanding (in shares)	6,060,744	5,939,482

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income
Interest and fees on loans	$ 15,498	$ 16,195	$ 46,164	$ 48,877
Interest on investment securities
Securities of U.S. government agencies	1,223	1,126	3,248	3,551
Obligations of state and political subdivisions	527	496	1,578	1,737
Corporate debt securities and other	162	254	546	778
Interest on Federal funds sold and due from banks	35	37	107	125
Total interest income	17,445	18,108	51,643	55,068
Interest expense
Interest on interest-bearing transaction accounts	28	25	88	74
Interest on savings accounts	12	12	37	34
Interest on money market accounts	125	126	375	415
Interest on time accounts	212	229	649	695
Interest on FHLB and overnight borrowings	80	79	236	235
Interest on subordinated debentures	105	106	314	316
Total interest expense	562	577	1,699	1,769
Net interest income	16,883	17,531	49,944	53,299
Provision for loan losses	0	0	0	750
Net interest income after provision for loan losses	16,883	17,531	49,944	52,549
Non-interest income
Service charges on deposit accounts	489	552	1,518	1,636
Wealth Management and Trust Services	568	567	1,809	1,744
Debit card interchange fees	372	375	1,087	1,035
Merchant interchange fees	171	224	430	629
Earnings on bank-owned life insurance	204	208	610	632
Dividends on FHLB stock	209	149	817	409
Gain on sale of securities	72	4	80	93
Other income	213	222	744	707
Total non-interest income	2,298	2,301	7,095	6,885
Non-interest expense
Salaries and related benefits	6,300	6,108	19,762	19,270
Occupancy and equipment	1,346	1,381	4,181	4,044
Depreciation and amortization	441	383	1,512	1,202
Federal Deposit Insurance Corporation insurance	250	261	739	780
Data processing	835	748	2,413	2,856
Professional services	493	537	1,572	1,577
Directors' expense	182	153	620	466
Information technology	186	180	554	517
Reversal of losses on off-balance sheet commitments	324	13	14	(2)
Other expense	1,281	1,586	4,447	4,940
Total non-interest expense	11,638	11,350	35,814	35,650
Income before provision for income taxes	7,543	8,482	21,225	23,784
Provision for income taxes	2,770	3,104	7,709	8,705
Net income	$ 4,773	$ 5,378	$ 13,516	$ 15,079
Net income per common share:
Basic (usd per share)	$ 0.80	$ 0.91	$ 2.27	$ 2.56
Diluted (usd per share)	$ 0.79	$ 0.89	$ 2.23	$ 2.51
Weighted average shares used to compute net income per common share:
Basic (shares)	5,963	5,903	5,943	5,887
Diluted (shares)	6,067	6,014	6,059	5,996
Dividends declared per common share (usd per share)	$ 0.22	$ 0.20	$ 0.66	$ 0.58
Comprehensive income:
Net income	$ 4,773	$ 5,378	$ 13,516	$ 15,079
Other comprehensive income
Change in net unrealized gain (loss) on available-for-sale securities	1,523	(344)	1,037	2,047
Reclassification adjustment for loss (gain) on available-for-sale securities included in net income	0	4	(8)	19
Net change in unrealized gain (loss) on available-for-sale securities, before tax	1,523	(340)	1,029	2,066
Deferred tax expense (benefit)	654	(141)	517	828
Other comprehensive income (loss), net of tax	869	(199)	512	1,238
Comprehensive income	$ 5,642	$ 5,179	$ 14,028	$ 16,317

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, 2013		5,877,524
Balance at Dec. 31, 2013	$ 180,887	$ 80,095	$ 101,464	$ (672)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,771		19,771
Other comprehensive income	1,760			1,760
Stock options exercised (in shares)		49,415
Stock options exercised	1,452	$ 1,452
Excess tax benefit - stock-based compensation	172	$ 172
Stock issued under employee stock purchase plan (in shares)		521
Stock issued under employee stock purchase plan	23	$ 23
Restricted stock granted (in shares)		8,523
Restricted stock granted	0	$ 0
Restricted stock forfeited/cancelled (in shares)		(2,067)
Restricted stock forfeited/cancelled	0	$ 0
Stock-based compensation - stock options	200	200
Stock-based compensation - restricted stock	246	$ 246
Cash dividends paid on common stock	(4,733)		(4,733)
Stock purchased by directors under director stock plan (in shares)		260
Stock purchased by directors under director stock plan	12	$ 12
Stock issued in payment of director fees (in shares)		5,306
Stock issued in payment of director fees	$ 236	$ 236
Balance (in shares) at Dec. 31, 2014	5,939,482	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	13,516		13,516
Other comprehensive income	512			512
Stock options exercised (in shares)		29,358
Stock options exercised	888	$ 888
Excess tax benefit - stock-based compensation	172	$ 172
Stock issued under employee stock purchase plan (in shares)		253
Stock issued under employee stock purchase plan	12	$ 12
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	192	192
Stock-based compensation - restricted stock	285	$ 285
Cash dividends paid on common stock	(3,936)		(3,936)
Stock purchased by directors under director stock plan (in shares)		245
Stock purchased by directors under director stock plan	12	$ 12	0
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		70,591
Balance (in shares) at Sep. 30, 2015	6,060,744	6,060,744
Balance at Sep. 30, 2015	$ 211,954	$ 84,272	$ 126,082	$ 1,600

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 4,773	$ 5,378	$ 13,516	$ 15,079	$ 19,771
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	0	0	0	750
Provision for (reversal of) losses on off-balance sheet commitments	324	13	14	(2)
Compensation expense - common stock for director fees			207	170
Stock-based compensation expense			477	336
Excess tax benefits from exercised stock options			(150)	(104)
Amortization of core deposit intangible			464	578
Amortization of investment security premiums, net of accretion of discounts			2,038	1,982
Accretion of discount on acquired loans			(1,569)	(3,311)
Accretion of discount on subordinated debentures			158	162
Net amortization of deferred loan origination costs/fees			(374)	(382)
Write-down of other real estate owned			40	0
Gain on sale of investment securities			(80)	(93)
Depreciation and amortization	441	383	1,512	1,202
Loss on disposal of premises and equipment			4	0
Earnings on bank-owned life insurance policies	(204)	(208)	(610)	(632)
Net change in operating assets and liabilities:
Interest receivable			303	122
Interest payable			(13)	(44)
Deferred rent and other rent-related expenses			42	165
Other assets			1,930	(44)
Other liabilities			(819)	(1,847)
Total adjustments			3,574	(992)
Net cash provided by operating activities			17,090	14,087
Cash Flows from Investing Activities:
Purchase of held-to-maturity securities			(2,375)	0
Purchase of available-for-sale securities			(189,755)	(16,353)
Proceeds from sale of available-for-sale securities	0	413	1,559	2,435
Proceeds from sale of held-to-maturity securities	1,015	0	1,015	2,146
Proceeds from paydowns/maturity of held-to-maturity securities			30,529	14,738
Proceeds from paydowns/maturity of available-for-sale securities			54,966	33,320
Proceeds from the sale of loan			1,502	0
Loans originated and principal collected, net			403	(88,028)
Purchase of FHLB stock			(136)	(492)
Purchase of premises and equipment			(1,194)	(1,369)
Cash paid for low income housing tax credit investment			(645)	(208)
Net cash used in investing activities			(104,131)	(53,811)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits			83,863	(15,478)
Proceeds from stock options exercised			888	1,146
Proceeds from stock issued under employee and director stock purchase plans			24	31
Cash dividends paid on common stock			(3,936)	(3,428)
Excess tax benefits from exercised stock options			150	104
Net cash provided by (used in) financing activities			80,989	(17,625)
Net decrease in cash and cash equivalents			(6,052)	(57,349)
Cash and cash equivalents at beginning of period			41,367	103,773	103,773
Cash and cash equivalents at end of period	$ 35,315	$ 46,424	35,315	46,424	$ 41,367
Supplemental disclosure of cash flow information:
Cash paid for interest			1,554	1,660
Cash paid for income taxes			6,603	6,940
Supplemental disclosure of non-cash investing and financing activities:
Change in unrealized gain on available-for-sale securities			(1,029)	(2,066)
Securities transferred from available-for-sale to held-to-maturity			0	14,297
Transfer of loan to loans held-for-sale at fair value			1,502	0
Subscription in low income housing tax credit investment			1,023	1,000
Stock issued in payment of director fees			$ 275	$ 236

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2015
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 financial statements and the notes thereto included in our 2014 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. In connection with the acquisition of NorCal Community Bancorp ("NorCal") (the "Acquisition"), Bancorp assumed ownership of Norcal Community Bancorp Trusts I and II (the "Trusts"). 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 due to the Trusts are shown as liabilities on our consolidated statements of condition (see Note 6). Bancorp's investment in the common stock 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 outstanding 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, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Weighted average basic shares outstanding 5,963 5,903 5,943 5,887 Add: Potentially dilutive common shares related to stock options 35 41 41 42 Potentially dilutive common shares related to unvested restricted stock 5 4 5 4 Potentially dilutive common shares related to the warrant 64 66 70 63 Weighted average diluted shares outstanding 6,067 6,014 6,059 5,996 Net income $ 4,773 $ 5,378 $ 13,516 $ 15,079 Basic EPS $ 0.80 $ 0.91 $ 2.27 $ 2.56 Diluted EPS $ 0.79 $ 0.89 $ 2.23 $ 2.51 Weighted average anti-dilutive shares not included in the calculation of diluted EPS 42 51 35 48

Recently Issued Accounting Stan

Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2015
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). The 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. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date which institutes a one-year deferral of the effective date of this amendment to annual reporting periods beginning after December 15, 2017. We are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the potential impact the new standard will have on our financial condition and results of operations. In June 2014, the FASB issued ASU No. 2014-12, Compensation - Stock Compensation (Topic 718) Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period . This ASU provides guidance for entities that grant their employees share-based payment awards where a performance target that affects vesting could be achieved after the requisite service period. That is the case when an employee is eligible to retire or otherwise terminate employment before the end of the period in which a performance target could be achieved and still be eligible to vest in the award if and when the performance target is achieved. This ASU stipulates that compensation expense should be recognized in the period where the performance target becomes probable of being achieved as opposed to the date that the award was granted. ASU 2014-12 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. We do not expect this ASU to have a material impact on our financial condition or results of operations. In April 2015, the FASB issued ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) Customer's Accounting for Fees Paid in a Cloud Computing Arrangement . The amendments in this ASU provide guidance about a customer's accounting for fees paid in a cloud computing arrangement. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, then the customer should account for the arrangement as a service contract. The two criteria that must be met to be considered a software license are: 1) the customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty; and 2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. ASU 2015-05 is effective for annual periods, including interim periods within those annual periods beginning after December 15, 2015. We do not expect this ASU to have a material impact on our financial condition or results of operations. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805) Simplifying the Accounting for Measurement-Period Adjustments . The amendments in this ASU require that an acquirer recognize adjustments to estimated amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. Prior to the amendments, an acquirer was required to retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill. ASU 2015-16 is effective for public business entities for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. 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, 2015
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) At September 30, 2015: Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 171,417 $ — $ 169,677 $ 1,740 Debentures of government-sponsored agencies $ 102,165 $ — $ 102,165 $ — Privately-issued collateralized mortgage obligations $ 4,891 $ — $ 4,891 $ — Obligations of state and political subdivisions $ 50,377 $ — $ 50,377 $ — Corporate bonds $ 5,006 $ — 5,006 $ — Derivative financial liabilities (interest rate contracts) $ 2,328 $ — $ 2,328 $ — At December 31, 2014: Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 158,119 $ — $ 155,421 $ 2,698 Debentures of government-sponsored agencies $ 14,557 $ — $ 14,557 $ — Privately-issued collateralized mortgage obligations $ 7,294 $ — $ 7,294 $ — Obligations of state and political subdivisions $ 15,880 $ — $ 15,771 $ — Corporate bonds $ 4,998 $ — $ 5,437 $ — Derivative financial assets (interest rate contracts) $ 61 $ — $ 61 $ — Derivative financial liabilities (interest rate contracts) $ 1,996 $ — $ 1,996 $ — 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, 2015 and December 31, 2014 , there were no securities that were considered Level 1 securities. As of September 30, 2015 , 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 pool of business equipment loans guaranteed by the Small Business Administration 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. It was transferred to a Level 3 security during the second quarter of 2014. The decrease in unrealized gain during the first nine months of 2015 was $8 thousand . 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 the collateral posted 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. 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, 2015 and December 31, 2014 . Impaired loans are only included in the following table when they are collateral dependent and the recorded investments of these loans are at the net realizable value of the collateral based on an impairment analysis. (in thousands) Carrying Value 1 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) At September 30, 2015: Other real estate $ 421 $ — $ — $ 421 At December 31, 2014: Impaired loans: Installment and other consumer 1 $ 77 $ — $ — $ 77 Other real estate $ 461 $ — $ — $ 461 1 Represents collateral-dependent loan principal balances that had been generally written down to the values of the underlying collateral, net of specific valuation allowances. At December 31, 2014, the $77 thousand carrying value of a consumer loan was net of a $26 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 type, leasing status and physical condition. When appraisals are received, Management reviews the assumptions and methodology utilized in the appraisal, 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 the nine months ended September 30, 2015 . 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 was acquired from Bank of Alameda as part of the Acquisition. There was a $40 thousand decline in the estimated fair value of the OREO during the first nine months ended September 30, 2015 recorded in other non-interest expense. Disclosures about Fair Value of Financial Instruments The table below is a summary of fair value estimates for financial instruments as of September 30, 2015 and December 31, 2014 , 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. September 30, 2015 December 31, 2014 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets Cash and cash equivalents $ 35,315 $ 35,315 Level 1 $ 41,367 $ 41,367 Level 1 Investment securities held-to-maturity 86,471 88,104 Level 2 116,437 118,643 Level 2 Loans, net 1,348,743 1,364,940 Level 3 1,348,252 1,361,244 Level 3 Interest receivable 5,606 5,606 Level 2 5,909 5,909 Level 2 Financial liabilities Deposits 1,635,482 1,636,088 Level 2 1,551,619 1,552,446 Level 2 Federal Home Loan Bank borrowings 15,000 15,437 Level 2 15,000 15,484 Level 2 Subordinated debentures 5,343 5,178 Level 3 5,185 5,290 Level 3 Interest payable 200 200 Level 2 213 213 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 mortgage-backed securities, 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, 2015 and December 31, 2014 , 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 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 duration of our fixed-rate credit advances. Subordinated Debentures - As part of the Acquisition, we assumed two subordinated debentures from NorCal. See Note 6 for further information. 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 debt securities 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. 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, 2015 and December 31, 2014.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2015
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, 2015 December 31, 2014 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 $ 50,570 $ 51,867 $ 1,302 $ (5 ) $ 63,425 $ 65,121 $ 1,736 $ (40 ) Corporate bonds 23,578 23,662 87 (3 ) 40,257 40,448 216 (25 ) MBS pass-through securities issued by FHLMC and FNMA 12,323 12,575 259 (7 ) 12,755 13,074 319 — Total held-to-maturity 86,471 88,104 1,648 (15 ) 116,437 118,643 2,271 (65 ) Available-for-sale Securities of U.S. government agencies: MBS pass-through securities issued by FHLMC and FNMA 116,513 117,963 1,488 (38 ) 92,963 94,214 1,262 (11 ) CMOs issued by FNMA 16,211 16,385 208 (34 ) 14,771 14,790 77 (58 ) CMOs issued by FHLMC 24,645 24,869 239 (15 ) 31,238 31,260 109 (87 ) CMOs issued by GNMA 11,951 12,200 254 (5 ) 17,573 17,855 298 (16 ) Debentures of government- sponsored agencies 101,987 102,165 229 (51 ) 14,694 14,557 95 (232 ) Privately issued CMOs 4,700 4,891 193 (2 ) 7,137 7,294 172 (15 ) Obligations of state and political subdivisions 50,073 50,377 345 (41 ) 15,733 15,880 155 (8 ) Corporate bonds 4,944 5,006 62 — 4,936 4,998 66 (4 ) Total available-for-sale 331,024 333,856 3,018 (186 ) 199,045 200,848 2,234 (431 ) Total investment securities $ 417,495 $ 421,960 $ 4,666 $ (201 ) $ 315,482 $ 319,491 $ 4,505 $ (496 ) The amortized cost and fair value of investment debt securities by contractual maturity at September 30, 2015 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, 2015 December 31, 2014 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 $ 34,325 $ 34,459 $ 11,955 $ 12,019 $ 39,778 $ 39,913 $ 2,378 $ 2,388 After one year but within five years 31,072 31,821 127,221 127,607 50,983 51,953 43,866 43,919 After five years through ten years 9,876 10,352 51,686 51,885 11,679 12,426 9,644 9,749 After ten years 11,198 11,472 140,162 142,345 13,997 14,351 143,157 144,792 Total $ 86,471 $ 88,104 $ 331,024 $ 333,856 $ 116,437 $ 118,643 $ 199,045 $ 200,848 Sales of investment securities and gross realized gains and losses are shown in the following table. The sales of the held-to-maturity securities were due to evidence of significant deterioration of the issuers' creditworthiness since purchase. Three months ended Nine months ended (in thousands) September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Available-for-sale: Sales proceeds $ — $ 413 $ 1,559 $ 2,435 Gross realized gains $ — $ 4 $ 8 $ 4 Gross realized (losses) $ — $ — $ — $ (15 ) Held-to-maturity: Sales proceeds $ 1,015 $ — $ 1,015 $ 2,146 Gross realized gains $ 72 $ — $ 72 $ 104 Gross realized (losses) $ — $ — $ — $ — Investment securities carried at $66.0 million and $74.7 million at September 30, 2015 and December 31, 2014 , respectively, were pledged to the State of California: $65.2 million and $73.8 million to secure public deposits in compliance with the Local Agency Security Program at September 30, 2015 and December 31, 2014 , respectively, and $844 thousand and $856 thousand to provide collateral for trust deposits at September 30, 2015 and December 31, 2014 , respectively. In addition, investment securities carried at $1.1 million were pledged to collateralize a Wealth Management and Trust Services (“WMTS”) checking account at both September 30, 2015 and December 31, 2014 . 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 security in our investment portfolio is other-than-temporarily impaired as of September 30, 2015. 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, 2015 before recovery of the cost basis. Twenty-nine and twenty-eight investment securities were in unrealized loss positions at September 30, 2015 and December 31, 2014 , respectively. Those securities are summarized and classified according to the duration of the loss period in the table below: September 30, 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 & political subdivisions $ 2,751 $ (5 ) $ — $ — $ 2,751 $ (5 ) Corporate bonds 5,540 (3 ) — — 5,540 (3 ) MBS pass-through securities issued by FHLMC and FNMA 2,344 (7 ) — — 2,344 (7 ) Total held-to-maturity 10,635 (15 ) — — 10,635 (15 ) Available-for-sale MBS pass-through securities issued by FHLMC and FNMA 21,640 (38 ) — — 21,640 (38 ) CMOs issued by FNMA — — 3,428 (34 ) 3,428 (34 ) CMOs issued by FHLMC — — 2,089 (15 ) 2,089 (15 ) CMOs issued by GNMA 2,570 (5 ) — — 2,570 (5 ) Debentures of government- sponsored agencies — — 9,949 (51 ) 9,949 (51 ) Privately issued CMOs — — 379 (2 ) 379 (2 ) Obligations of state & political subdivisions 9,867 (39 ) 582 (2 ) 10,449 (41 ) Total available-for-sale 34,077 (82 ) 16,427 (104 ) 50,504 (186 ) Total temporarily impaired securities $ 44,712 $ (97 ) $ 16,427 $ (104 ) $ 61,139 $ (201 ) December 31, 2014 < 12 continuous months ≥ 12 continuous months Total securities in a loss position (dollars in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Held-to-maturity Obligations of state & political subdivisions $ 5,830 $ (27 ) $ 359 $ (13 ) $ 6,189 $ (40 ) Corporate bonds 3,009 (1 ) 3,533 (24 ) 6,542 (25 ) Total held-to-maturity 8,839 (28 ) 3,892 (37 ) 12,731 (65 ) Available-for-sale MBS pass-through securities issued by FHLMC and FNMA 1,960 (11 ) — — 1,960 (11 ) CMOs issued by FNMA — — 4,115 (58 ) 4,115 (58 ) CMOs issued by FHLMC 17,157 (44 ) 2,291 (43 ) 19,448 (87 ) CMOs issued by GNMA 3,262 (16 ) — — 3,262 (16 ) Debentures of government- sponsored agencies 494 (1 ) 9,769 (231 ) 10,263 (232 ) Privately issued CMOs 817 (15 ) — — 817 (15 ) Obligations of state & political subdivisions 2,695 (3 ) 1,112 (5 ) 3,807 (8 ) Corporate bonds 1,002 (1 ) 990 (3 ) 1,992 (4 ) Total available-for-sale 27,387 (91 ) 18,277 (340 ) 45,664 (431 ) Total temporarily impaired securities $ 36,226 $ (119 ) $ 22,169 $ (377 ) $ 58,395 $ (496 ) As of September 30, 2015, there were six investment positions that had been in a continuous loss position for twelve months or more. These securities consisted of government-sponsored agency debentures, obligations of U.S. state and political subdivisions, and CMOs. We have evaluated each of the bonds and believe that the decline in fair value is primarily driven by factors other than credit. It is probable that we will be able to collect all amounts due according to the contractual terms and no other-than-temporary impairment exists on these securities. The government-sponsored agency debentures and CMOs issued by FNMA and FHLMC are supported by the U.S. Federal Government to protect us from credit losses. The obligations of state and political subdivisions were deemed creditworthy based on our review of the issuers' recent financial information and their insurers, if any. Based upon our assessment of the credit fundamentals and the credit enhancements, we concluded that these securities were not other-than-temporarily impaired at September 30, 2015. Twenty-three investment securities in our portfolio were in a temporary loss position for less than twelve months as of September 30, 2015. They consisted of U.S. agency CMO and MBS pass-through securities, obligations of U.S. state and political subdivisions, and corporate bonds. We determine that the strength of GNMA through the U.S. Federal Government guarantee is sufficient to protect us from credit losses. Other temporarily impaired securities are deemed creditworthy after internal analysis. 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, 2015. Non-Marketable Securities As a member of the FHLB, we are required to maintain a minimum investment in the 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 $8.4 million and $8.2 million of FHLB stock recorded at cost in other assets on the consolidated statements of condition at September 30, 2015 and December 31, 2014 , 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 28, 2015, FHLB announced a cash dividend for the third quarter of 2015 at an annualized dividend rate of 8.79% to be distributed in mid November. 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 current conversion rate of 1.6483 and the closing stock price of Class A shares, the value of our shares of Class B common stock would have been $1.9 million at September 30, 2015 and $1.8 million at December 31, 2014 . 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 $2.7 million and $1.8 million recorded in other assets as of September 30, 2015 and December 31, 2014 , respectively. In the first nine months of 2015, we recognized $169 thousand of low income housing tax credits and other tax benefits, net of $131 thousand of amortization expense of low income housing tax credit investment, as a component of i ncome tax expense . As of September 30, 2015, our unfunded commitments for these low income housing tax credit funds totaled $1.8 million . We did not recognize any impairment losses on these low income housing tax credit investments during the first nine months of 2015, or the year ended December 31, 2014.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses Credit Quality of Loans Past due and non-accrual loans by class as of September 30, 2015 and December 31, 2014 were as follows: (dollars 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, 2015 30-59 days past due $ 1,780 $ 139 $ 421 $ — $ 862 $ — $ 7 $ 3,209 60-89 days past due 150 — — — 99 — 2 251 90 days or more past due 21 — — — 100 — 72 193 Total past due 1,951 139 421 — 1,061 — 81 3,653 Current 188,016 239,196 671,256 54,921 112,670 71,682 21,806 1,359,547 Total loans 3 $ 189,967 $ 239,335 $ 671,677 $ 54,921 $ 113,731 $ 71,682 $ 21,887 $ 1,363,200 Non-accrual 2 354 — 2,020 2 172 — 90 2,638 December 31, 2014 30-59 days past due $ 183 $ — $ — $ — $ 646 $ — $ 180 $ 1,009 Non-accrual 2 — 1,403 2,429 5,134 280 — 104 9,350 Total past due 183 1,403 2,429 5,134 926 — 284 10,359 Current 210,040 229,202 671,070 43,279 109,862 73,035 16,504 1,352,992 Total loans 3 $ 210,223 $ 230,605 $ 673,499 $ 48,413 $ 110,788 $ 73,035 $ 16,788 $ 1,363,351 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 $2 thousand of Purchased Credit Impaired ("PCI") loans that had stopped accreting interest at September 30, 2015 and $1.4 million at December 31, 2014 . Amounts exclude accreting PCI loans of $3.7 million and $3.8 million at September 30, 2015 and December 31, 2014 , 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. 3 Amounts include net deferred loan costs of $861 thousand and $487 thousand at September 30, 2015 and December 31, 2014 , respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $3.4 million and $4.4 million at September 30, 2015 and December 31, 2014 , respectively. Our commercial loans are generally made to established small and mid-sized businesses to provide financing for their 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, substantially all 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. The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio. Construction loans are generally made to developers and builders to finance construction, renovation and occasionally land acquisitions. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. The construction industry can be impacted 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 complete 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 exclusively in San Francisco. These loans tend to have more equity in their properties than conventional residential mortgages, which mitigates risk. 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 impacts. Negative external industry factors are generally not present. The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period. Special Mention - Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification. Substandard - Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies. Doubtful - Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on nonaccrual 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 at least 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, 2015 and December 31, 2014 : (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 Credit Risk Profile by Internally Assigned Grade: September 30, 2015 Pass $ 166,622 $ 216,017 $ 662,858 $ 51,680 $ 111,020 $ 71,596 $ 21,544 $ 3,249 $ 1,304,586 Special Mention 18,288 12,445 2,438 — 1,419 — — — 34,590 Substandard 4,873 9,184 4,651 3,238 1,224 86 343 425 24,024 Total loans $ 189,783 $ 237,646 $ 669,947 $ 54,918 $ 113,663 $ 71,682 $ 21,887 $ 3,674 $ 1,363,200 December 31, 2014 Pass $ 197,659 $ 205,820 $ 651,548 $ 41,710 $ 107,933 $ 70,987 $ 16,101 $ 2,210 $ 1,293,968 Special Mention 6,776 10,406 13,304 1,008 322 — 190 1,140 33,146 Substandard 5,464 11,763 6,473 5,684 2,466 2,048 497 1,842 36,237 Total loans $ 209,899 $ 227,989 $ 671,325 $ 48,402 $ 110,721 $ 73,035 $ 16,788 $ 5,192 $ 1,363,351 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 nonaccrual 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. During the first nine months of 2015, four loans with a recorded investment totaling $1.4 million were removed from TDR designation. There were no loans removed from TDR designation during 2014. The table below summarizes outstanding TDR loans by loan class as of September 30, 2015 and December 31, 2014 . The summary includes both TDRs that are on non-accrual status and those that continue to accrue interest. (in thousands) As of Recorded investment in Troubled Debt Restructurings 1 September 30, 2015 December 31, 2014 Commercial and industrial $ 4,098 $ 3,584 Commercial real estate, owner-occupied 6,993 8,459 Commercial real estate, investor 733 524 Construction 2 3,238 5,684 Home equity 463 694 Other residential 2,020 2,045 Installment and other consumer 1,367 1,713 Total $ 18,912 $ 22,703 1 Includes $18.8 million and $15.9 million of TDR loans that were accruing interest as of September 30, 2015 and December 31, 2014 , respectively. Includes $147 thousand and $1.8 million of acquired loans at September 30, 2015 and December 31, 2014 , respectively. 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 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 paid-off and fully charged-off TDR loans. (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, 2015: Commercial and industrial 1 $ 700 $ 700 $ 700 Total 1 $ 700 $ 700 $ 700 Troubled Debt Restructurings during the three months ended September 30, 2014: Commercial and industrial 2 $ 513 $ 596 $ 596 Commercial real estate, owner occupied 1 4,226 4,216 4,206 Commercial real estate, investor 1 74 74 74 Construction 1 815 814 814 Total 5 $ 5,628 $ 5,700 $ 5,690 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 Troubled Debt Restructurings during the nine months ended September 30, 2014: Commercial and industrial 1 7 $ 1,336 $ 1,460 $ 1,431 Commercial real estate, owner-occupied 1 4,226 4,216 4,206 Other residential 1 815 814 814 Home equity 2 224 224 222 Installment and other consumer 6 281 278 270 Total 17 $ 6,882 $ 6,992 $ 6,943 1 Excludes one contract modified and subsequently paid off during the nine months ended September 30, 2014 in the amount of $905 thousand pre-modification and post-modification. Modifications during the nine months ended September 30, 2015 primarily involved maturity extensions and other changes to loan terms, while modifications during the nine months ended September 30, 2014 primarily involved maturity extensions and interest rate concessions. During the first nine months of 2015 and 2014, 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, 2015 Recorded investment in impaired loans: With no specific allowance recorded $ 2,108 $ 2,882 $ 2,537 $ 2,688 $ 171 $ 1,220 $ 329 $ 11,935 With a specific allowance recorded 2,343 4,111 217 552 391 800 1,128 9,542 Total recorded investment in impaired loans $ 4,451 $ 6,993 $ 2,754 $ 3,240 $ 562 $ 2,020 $ 1,457 $ 21,477 Unpaid principal balance of impaired loans: With no specific allowance recorded $ 2,105 $ 2,882 $ 4,528 $ 2,688 $ 171 $ 1,220 $ 329 $ 13,923 With a specific allowance recorded 2,398 4,111 217 674 391 800 1,128 9,719 Total unpaid principal balance of impaired loans $ 4,503 $ 6,993 $ 4,745 $ 3,362 $ 562 $ 2,020 $ 1,457 $ 23,642 Specific allowance $ 935 $ 55 $ — $ 3 $ 3 $ 71 $ 121 $ 1,188 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 Average recorded investment in impaired loans during the quarter ended September 30, 2014 $ 5,292 $ 6,982 $ 3,090 $ 6,678 $ 857 $ 1,440 $ 1,847 $ 26,186 Interest income recognized on impaired loans during the quarter ended September 30, 2014 $ 88 $ 54 $ 7 $ 23 $ 5 $ 14 $ 19 $ 210 Average recorded investment in impaired loans during the nine months ended September 30, 2014 $ 5,818 $ 5,980 $ 3,186 $ 6,568 $ 730 $ 1,726 $ 1,876 $ 25,884 Interest income recognized on impaired loans during the nine months ended September 30, 2014 $ 309 $ 220 $ 21 $ 67 $ 14 $ 56 $ 56 $ 743 (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, 2014 Recorded investment in impaired loans: With no specific allowance recorded $ 1,141 $ 5,577 $ 2,954 $ 5,134 $ 393 $ 1,026 $ 239 $ 16,464 With a specific allowance recorded 2,443 2,882 — 561 300 1,019 1,554 $ 8,759 Total recorded investment in impaired loans $ 3,584 $ 8,459 $ 2,954 $ 5,695 $ 693 $ 2,045 $ 1,793 $ 25,223 Unpaid principal balance of impaired loans: With no specific allowance recorded $ 1,186 $ 6,577 $ 4,945 $ 7,824 $ 880 $ 1,026 $ 239 $ 22,677 With a specific allowance recorded 2,524 2,882 — 749 300 1,019 1,554 9,028 Total unpaid principal balance of impaired loans $ 3,710 $ 9,459 $ 4,945 $ 8,573 $ 1,180 $ 2,045 $ 1,793 $ 31,705 Specific allowance $ 694 $ 65 $ — $ 3 $ — $ 92 $ 284 $ 1,138 Average recorded investment in impaired loans during 2014 5,354 6,604 3,138 6,471 741 1,744 1,857 25,909 Interest income recognized on impaired loans during 2014 378 288 28 85 19 74 76 948 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. The charged-off portion of impaired loans outstanding at September 30, 2015 totaled approximately $2.7 million . In addition, the recorded investment in impaired loans is net of purchase discounts or premiums on acquired loans. At September 30, 2015 and December 31, 2014, outstanding commitments to extend credit on impaired loans, including loans to borrowers whose terms have been modified in TDRs, totaled $857 thousand and $1.4 million , respectively. 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 For the 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 For the 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 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 For the three months ended September 30, 2014 Allowance for loan losses: Beginning balance $ 3,125 $ 1,979 $ 6,713 $ 571 $ 944 $ 454 $ 481 $ 633 $ 14,900 Provision (reversal) (263 ) 9 (26 ) (33 ) (18 ) (8 ) 90 249 — Charge-offs — — — — — — (2 ) — (2 ) Recoveries 44 5 5 96 1 — — — 151 Ending balance $ 2,906 $ 1,993 $ 6,692 $ 634 $ 927 $ 446 $ 569 $ 882 $ 15,049 For the nine months ended September 30, 2014 Allowance for loan losses: Beginning balance $ 3,056 $ 2,012 $ 6,196 $ 633 $ 875 $ 317 $ 629 $ 506 $ 14,224 Provision (reversal) (208 ) (24 ) 455 109 49 129 (136 ) 376 750 Charge-offs (66 ) — — (204 ) — — (6 ) — (276 ) Recoveries 124 5 41 96 3 — 82 — 351 Ending balance $ 2,906 $ 1,993 $ 6,692 $ 634 $ 927 $ 446 $ 569 $ 882 $ 15,049 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 As of September 30, 2015: Ending ALLL related to loans collectively evaluated for impairment $ 1,781 $ 2,013 $ 6,084 $ 691 $ 850 $ 314 $ 355 $ 1,181 $ 13,269 Ending ALLL related to loans individually evaluated for impairment $ 928 $ 56 $ — $ — $ 3 $ 71 $ 121 $ — $ 1,179 Ending ALLL related to purchased credit-impaired loans $ 7 $ — $ — $ 2 $ — $ — $ — $ — $ 9 Total $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 Loans outstanding: Collectively evaluated for impairment $ 185,478 $ 230,653 $ 667,192 $ 51,681 $ 113,101 $ 69,662 $ 20,430 $ — $ 1,338,197 Individually evaluated for impairment 1 4,305 6,993 2,754 3,238 562 2,020 1,457 — 21,329 Purchased credit-impaired 184 1,689 1,731 2 68 — — — 3,674 Total $ 189,967 $ 239,335 $ 671,677 $ 54,921 $ 113,731 $ 71,682 $ 21,887 $ — $ 1,363,200 Ratio of allowance for loan losses to total loans 1.43 % 0.86 % 0.91 % 1.26 % 0.75 % 0.54 % 2.17 % NM 1.06 % Allowance for loan losses to non-accrual loans 767 % NM 301 % 347 % 496 % NM 481 % NM 548 % 1 Total excludes $147 thousand of PCI loans that have experienced 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 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 As of December 31, 2014: Ending ALLL related to loans collectively evaluated for impairment $ 2,143 $ 1,859 $ 6,672 $ 836 $ 859 $ 341 $ 282 $ 969 $ 13,961 Ending ALLL related to loans individually evaluated for impairment $ 690 $ 65 $ — $ — $ — $ 92 $ 284 $ — $ 1,131 Ending ALLL related to purchased credit-impaired loans $ 4 $ — $ — $ 3 $ — $ — $ — $ — $ 7 Total $ 2,837 $ 1,924 $ 6,672 $ 839 $ 859 $ 433 $ 566 $ 969 $ 15,099 Loans outstanding: Collectively evaluated for impairment $ 206,603 $ 220,933 $ 668,371 $ 42,718 $ 110,028 $ 70,990 $ 14,995 $ — $ 1,334,638 Individually evaluated for impairment 1 3,296 7,056 2,954 5,684 693 2,045 1,793 — 23,521 Purchased credit-impaired 324 2,616 2,174 11 67 — — — 5,192 Total $ 210,223 $ 230,605 $ 673,499 $ 48,413 $ 110,788 $ 73,035 $ 16,788 $ — $ 1,363,351 Ratio of allowance for loan losses to total loans 1.35 % 0.83 % 0.99 % 1.73 % 0.78 % 0.59 % 3.37 % NM 1.11 % Allowance for loan losses to non-accrual loans NM 137 % 275 % 16 % 307 % NM 544 % NM 161 % 1 Total excludes $1.7 million PCI loans that have experienced credit deterioration post-acquisition, which 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 nonaccrual status, past due status, loan risk grade, loan-to-value ratio, etc. Revolving credit agreements (e.g., home equity lines of credit and revolving commercial loans) are not considered PCI loans as cash flows cannot be reasonably estimated. The following table reflects the outstanding balance and related carrying value of PCI loans as of September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 PCI Loans (in thousands) Unpaid principal balance Carrying value Unpaid principal balance Carrying value Commercial and industrial $ 258 $ 184 $ 479 $ 324 Commercial real estate 4,355 3,420 6,831 4,790 Construction 125 2 136 11 Home equity 227 68 232 67 Total purchased credit-impaired loans $ 4,965 $ 3,674 $ 7,678 $ 5,192 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 (dollars in thousands) September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Balance at beginning of period $ 3,711 $ 4,514 $ 4,027 $ 3,649 Removals 1 (837 ) — (914 ) (273 ) Accretion (128 ) (126 ) (367 ) (494 ) Reclassifications from nonaccretable difference 2 — (242 ) — 1,264 Balance at end of period $ 2,746 $ 4,146 $ 2,746 $ 4,146 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 $831.6 million and $868.1 million at September 30, 2015 and December 31, 2014 , respectively. In addition, we pledge a certain residential loan portfolio, which totaled $41.9 million and $34.0 million at September 30, 2015 and December 31, 2014 , respectively, to secure our borrowing capacity with the Federal Reserve Bank ( “ FRB ” ). Also see Note 6 below.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2015
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, 2015 and December 31, 2014 . In general, interest rates on these lines approximate the federal funds target rate. At September 30, 2015 and December 31, 2014 , we had no overnight borrowings outstanding under these credit facilities. Federal Home Loan Bank Borrowings – As of September 30, 2015 and December 31, 2014 , the Bank had lines of credit with the FHLB totaling $467.6 million and $450.6 million , respectively, based on eligible collateral of certain loans. At September 30, 2015 and December 31, 2014 , we had no 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% , which remained outstanding at September 30, 2015 . Interest-only payments are required every three months until the entire principal is due on February 5, 2018. The FHLB has the unconditional right to accelerate the due date on November 5, 2015 and every three months thereafter (the “put dates”). If the FHLB exercises its right to accelerate the due date, the FHLB will offer replacement funding at the current market rate, subject to certain conditions. The Bank must comply with the put date, but are not required to accept replacement funding. At September 30, 2015 , $452.3 million was remaining as available for borrowing from the FHLB, net of the term borrowing and letters of credit acquired from NorCal totaling $241 thousand . Federal Reserve Line of Credit – The Bank has a line of credit with the FRB secured by certain residential loans. At September 30, 2015 and December 31, 2014 , the Bank had borrowing capacity under this line totaling $35.3 million and $27.7 million , respectively, and had no outstanding borrowings with the FRB. As part of the 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 $158 thousand in the first nine months of 2015 and $162 thousand in the first nine months of 2014. 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, 2015 : (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 (3.34% as of September 30, 2015), 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 (1.74% as of September 30, 2015), 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, 2015
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. 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, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Cash dividends to common stockholders $ 1,316 $ 1,185 $ 3,936 $ 3,428 Cash dividends per common share $ 0.22 $ 0.20 $ 0.66 $ 0.58 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, 2015
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. Since some of the commitments are expected to 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 contract amount of the commitment in the event of nonperformance by the borrower. We use the same credit policies in making commitments as we do for on-balance-sheet instruments and we evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by us, is based on Management's credit evaluation of the borrower. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, and real property. The contractual amount of loan commitments and standby letters of credit not reflected on the consolidated statements of condition was $375.5 million at September 30, 2015 . This amount included $195.6 million under commercial lines of credit (these commitments are generally contingent upon customers maintaining specific credit standards), $125.1 million under revolving home equity lines, $38.9 million under undisbursed construction loans, $4.3 million under standby letters of credit, and a remaining $11.6 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 $1.0 million for these commitments as of September 30, 2015 and December 31, 2014, which is recorded in interest payable and other liabilities on the consolidated statements of condition. Operating Leases We rent certain premises and equipment under long-term, non-cancelable operating leases expiring at various dates through the year 2028. Most of the leases contain certain renewal options and escalation clauses. At September 30, 2015 , the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows: (in thousands) 2015 2016 2017 2018 2019 Thereafter Total Operating leases 1 $ 941 $ 3,763 $ 3,755 $ 3,784 $ 3,526 $ 6,678 $ 22,447 1 Minimum payments have not been reduced by minimum sublease rentals of $271 thousand due in the future under non- cancelable subleases. 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 Inc. maintains an escrow account from which settlements of, or judgments in, the covered litigation are paid. According to the latest SEC Form 10-Q filed by Visa, Inc. on July 23, 2015, at June 30, 2015, the balance of the escrow account was $1.1 billion . On January 14, 2015, following a Court-approved process to give class members who previously opted out of the damages portion of the class settlement an option to rejoin it, the class administrator submitted a report stating that it had received 1,179 requests by merchants to rejoin the cash settlement class, some of which may include multiple merchants. The conversion rate of Visa Class B common stock held by us to Class A common stock (as discussed in Note 4) may reduce if Visa makes more Covered Litigation settlement payments in the future, and the full impact to 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, 2015
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 swaps is limited to the favorable 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, 2015 , we had eight interest rate swap agreements, which are scheduled to mature in September 2018, June 2020, August 2020, June 2031, October 2031, July 2032, August 2037 and October 2037. All of our derivatives are accounted for as fair value hedges. Our interest rate swaps are settled monthly with counterparties. Accrued interest on the swaps totaled $34 thousand and $41 thousand as of September 30, 2015 and December 31, 2014 , respectively. Information on our derivatives follows: Asset derivatives Liability derivatives (in thousands) September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Fair value hedges: Interest rate contracts notional amount $ — $ 4,589 $ 29,999 $ 26,899 Interest rate contracts fair value 1 $ — $ 61 $ 2,328 $ 1,996 Three months ended (in thousands) September 30, 2015 September 30, 2014 (Decrease) increase in value of designated interest rate swaps recognized in interest income $ (813 ) $ 21 Payment on interest rate swaps recorded in interest income (231 ) (251 ) Increase (decrease) in value of hedged loans recognized in interest income 905 (54 ) Decrease in value of yield maintenance agreement recognized against interest income (13 ) (15 ) Net loss on derivatives recognized against interest income 2 $ (152 ) $ (299 ) Nine months ended (in thousands) September 30, 2015 September 30, 2014 (Decrease) increase in value of designated interest rate swaps recognized in interest income $ (393 ) $ 334 Payment on interest rate swaps recorded in interest income (700 ) (755 ) Increase (decrease) in value of hedged loans recognized in interest income 453 (133 ) Decrease in value of yield maintenance agreement recognized against interest income (39 ) (77 ) Net loss on derivatives recognized against interest income 2 $ (679 ) $ (631 ) 1 See Note 3 for valuation methodology. 2 Includes hedge ineffectiveness gain of $79 thousand and loss of $48 thousand for the quarters ended September 30, 2015 and September 30, 2014 , respectively. Ineffectiveness gain of $21 thousand and $125 thousand was recorded in interest income during the nine months ended September 30, 2015 and September 30, 2014 , 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 offset the change in the fair value of the hedged items. 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 (in thousands) Gross Amounts Not Offset in the Statements of Condition Gross Amounts Net Amounts Gross Amounts Offset in the of Assets Presented of Recognized Statements of in the Statements Financial Cash Collateral Assets 1 Condition of Condition 1 Instruments Received Net Amount As of September 30, 2015 Derivatives by Counterparty Counterparty A $ — $ — $ — $ — $ — $ — Counterparty B — — — — — — Total $ — $ — $ — $ — $ — $ — As of December 31, 2014 Derivatives by Counterparty Counterparty A $ 61 $ — $ 61 $ (61 ) $ — $ — Counterparty B — — — — — — Total $ 61 $ — $ 61 $ (61 ) $ — $ — 1 Amounts exclude accrued interest totaling zero and $1 thousand at September 30, 2015 and December 31, 2014 , respectively. Offsetting of Financial Liabilities and Derivative Liabilities (in thousands) Gross Amounts Not Offset in the Statements of Condition Gross Amounts Net Amounts of Gross Amounts Offset in the Liabilities Presented of Recognized Statements of in the Statements of Financial Cash Collateral Liabilities 2 Condition Condition 2 Instruments Pledged Net Amount As of September 30, 2015 Derivatives by Counterparty Counterparty A $ 2,001 $ — $ 2,001 $ — $ (2,001 ) $ — Counterparty B 327 — 327 — (327 ) — Total $ 2,328 $ — $ 2,328 $ — $ (2,328 ) $ — As of December 31, 2014 Derivatives by Counterparty Counterparty A $ 1,616 $ — $ 1,616 $ (61 ) $ (1,360 ) $ 195 Counterparty B 380 — 380 — (380 ) — Total $ 1,996 $ — $ 1,996 $ (61 ) $ (1,740 ) $ 195 2 Amounts exclude accrued interest totaling $34 thousand and $40 thousand at September 30, 2015 and December 31, 2014 , respectively.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2015
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 financial statements and the notes thereto included in our 2014 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. In connection with the acquisition of NorCal Community Bancorp ("NorCal") (the "Acquisition"), Bancorp assumed ownership of Norcal Community Bancorp Trusts I and II (the "Trusts"). 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 due to the Trusts are shown as liabilities on our consolidated statements of condition (see Note 6). Bancorp's investment in the common stock 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 outstanding 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). The 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. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date which institutes a one-year deferral of the effective date of this amendment to annual reporting periods beginning after December 15, 2017. We are currently evaluating the provisions of this ASU and will be monitoring developments and additional guidance to determine the potential impact the new standard will have on our financial condition and results of operations. In June 2014, the FASB issued ASU No. 2014-12, Compensation - Stock Compensation (Topic 718) Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period . This ASU provides guidance for entities that grant their employees share-based payment awards where a performance target that affects vesting could be achieved after the requisite service period. That is the case when an employee is eligible to retire or otherwise terminate employment before the end of the period in which a performance target could be achieved and still be eligible to vest in the award if and when the performance target is achieved. This ASU stipulates that compensation expense should be recognized in the period where the performance target becomes probable of being achieved as opposed to the date that the award was granted. ASU 2014-12 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. We do not expect this ASU to have a material impact on our financial condition or results of operations. In April 2015, the FASB issued ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) Customer's Accounting for Fees Paid in a Cloud Computing Arrangement . The amendments in this ASU provide guidance about a customer's accounting for fees paid in a cloud computing arrangement. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, then the customer should account for the arrangement as a service contract. The two criteria that must be met to be considered a software license are: 1) the customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty; and 2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. ASU 2015-05 is effective for annual periods, including interim periods within those annual periods beginning after December 15, 2015. We do not expect this ASU to have a material impact on our financial condition or results of operations. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805) Simplifying the Accounting for Measurement-Period Adjustments . The amendments in this ASU require that an acquirer recognize adjustments to estimated amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. Prior to the amendments, an acquirer was required to retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill. ASU 2015-16 is effective for public business entities for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. 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, 2015
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 outstanding 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, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Weighted average basic shares outstanding 5,963 5,903 5,943 5,887 Add: Potentially dilutive common shares related to stock options 35 41 41 42 Potentially dilutive common shares related to unvested restricted stock 5 4 5 4 Potentially dilutive common shares related to the warrant 64 66 70 63 Weighted average diluted shares outstanding 6,067 6,014 6,059 5,996 Net income $ 4,773 $ 5,378 $ 13,516 $ 15,079 Basic EPS $ 0.80 $ 0.91 $ 2.27 $ 2.56 Diluted EPS $ 0.79 $ 0.89 $ 2.23 $ 2.51 Weighted average anti-dilutive shares not included in the calculation of diluted EPS 42 51 35 48

Fair Value of Assets and Liab18

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
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) At September 30, 2015: Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 171,417 $ — $ 169,677 $ 1,740 Debentures of government-sponsored agencies $ 102,165 $ — $ 102,165 $ — Privately-issued collateralized mortgage obligations $ 4,891 $ — $ 4,891 $ — Obligations of state and political subdivisions $ 50,377 $ — $ 50,377 $ — Corporate bonds $ 5,006 $ — 5,006 $ — Derivative financial liabilities (interest rate contracts) $ 2,328 $ — $ 2,328 $ — At December 31, 2014: Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 158,119 $ — $ 155,421 $ 2,698 Debentures of government-sponsored agencies $ 14,557 $ — $ 14,557 $ — Privately-issued collateralized mortgage obligations $ 7,294 $ — $ 7,294 $ — Obligations of state and political subdivisions $ 15,880 $ — $ 15,771 $ — Corporate bonds $ 4,998 $ — $ 5,437 $ — Derivative financial assets (interest rate contracts) $ 61 $ — $ 61 $ — Derivative financial liabilities (interest rate contracts) $ 1,996 $ — $ 1,996 $ —
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, 2015 and December 31, 2014 . Impaired loans are only included in the following table when they are collateral dependent and the recorded investments of these loans are at the net realizable value of the collateral based on an impairment analysis. (in thousands) Carrying Value 1 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) At September 30, 2015: Other real estate $ 421 $ — $ — $ 421 At December 31, 2014: Impaired loans: Installment and other consumer 1 $ 77 $ — $ — $ 77 Other real estate $ 461 $ — $ — $ 461 1 Represents collateral-dependent loan principal balances that had been generally written down to the values of the underlying collateral, net of specific valuation allowances. At December 31, 2014, the $77 thousand carrying value of a consumer loan was net of a $26 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, 2015 and December 31, 2014 , 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. September 30, 2015 December 31, 2014 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets Cash and cash equivalents $ 35,315 $ 35,315 Level 1 $ 41,367 $ 41,367 Level 1 Investment securities held-to-maturity 86,471 88,104 Level 2 116,437 118,643 Level 2 Loans, net 1,348,743 1,364,940 Level 3 1,348,252 1,361,244 Level 3 Interest receivable 5,606 5,606 Level 2 5,909 5,909 Level 2 Financial liabilities Deposits 1,635,482 1,636,088 Level 2 1,551,619 1,552,446 Level 2 Federal Home Loan Bank borrowings 15,000 15,437 Level 2 15,000 15,484 Level 2 Subordinated debentures 5,343 5,178 Level 3 5,185 5,290 Level 3 Interest payable 200 200 Level 2 213 213 Level 2

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2015
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, 2015 December 31, 2014 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 $ 50,570 $ 51,867 $ 1,302 $ (5 ) $ 63,425 $ 65,121 $ 1,736 $ (40 ) Corporate bonds 23,578 23,662 87 (3 ) 40,257 40,448 216 (25 ) MBS pass-through securities issued by FHLMC and FNMA 12,323 12,575 259 (7 ) 12,755 13,074 319 — Total held-to-maturity 86,471 88,104 1,648 (15 ) 116,437 118,643 2,271 (65 ) Available-for-sale Securities of U.S. government agencies: MBS pass-through securities issued by FHLMC and FNMA 116,513 117,963 1,488 (38 ) 92,963 94,214 1,262 (11 ) CMOs issued by FNMA 16,211 16,385 208 (34 ) 14,771 14,790 77 (58 ) CMOs issued by FHLMC 24,645 24,869 239 (15 ) 31,238 31,260 109 (87 ) CMOs issued by GNMA 11,951 12,200 254 (5 ) 17,573 17,855 298 (16 ) Debentures of government- sponsored agencies 101,987 102,165 229 (51 ) 14,694 14,557 95 (232 ) Privately issued CMOs 4,700 4,891 193 (2 ) 7,137 7,294 172 (15 ) Obligations of state and political subdivisions 50,073 50,377 345 (41 ) 15,733 15,880 155 (8 ) Corporate bonds 4,944 5,006 62 — 4,936 4,998 66 (4 ) Total available-for-sale 331,024 333,856 3,018 (186 ) 199,045 200,848 2,234 (431 ) Total investment securities $ 417,495 $ 421,960 $ 4,666 $ (201 ) $ 315,482 $ 319,491 $ 4,505 $ (496 )
Investments Classified by Contractual Maturity Date	The amortized cost and fair value of investment debt securities by contractual maturity at September 30, 2015 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, 2015 December 31, 2014 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 $ 34,325 $ 34,459 $ 11,955 $ 12,019 $ 39,778 $ 39,913 $ 2,378 $ 2,388 After one year but within five years 31,072 31,821 127,221 127,607 50,983 51,953 43,866 43,919 After five years through ten years 9,876 10,352 51,686 51,885 11,679 12,426 9,644 9,749 After ten years 11,198 11,472 140,162 142,345 13,997 14,351 143,157 144,792 Total $ 86,471 $ 88,104 $ 331,024 $ 333,856 $ 116,437 $ 118,643 $ 199,045 $ 200,848
Schedule of Realized Gain (Loss)	Sales of investment securities and gross realized gains and losses are shown in the following table. The sales of the held-to-maturity securities were due to evidence of significant deterioration of the issuers' creditworthiness since purchase. Three months ended Nine months ended (in thousands) September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Available-for-sale: Sales proceeds $ — $ 413 $ 1,559 $ 2,435 Gross realized gains $ — $ 4 $ 8 $ 4 Gross realized (losses) $ — $ — $ — $ (15 ) Held-to-maturity: Sales proceeds $ 1,015 $ — $ 1,015 $ 2,146 Gross realized gains $ 72 $ — $ 72 $ 104 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 table below: September 30, 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 & political subdivisions $ 2,751 $ (5 ) $ — $ — $ 2,751 $ (5 ) Corporate bonds 5,540 (3 ) — — 5,540 (3 ) MBS pass-through securities issued by FHLMC and FNMA 2,344 (7 ) — — 2,344 (7 ) Total held-to-maturity 10,635 (15 ) — — 10,635 (15 ) Available-for-sale MBS pass-through securities issued by FHLMC and FNMA 21,640 (38 ) — — 21,640 (38 ) CMOs issued by FNMA — — 3,428 (34 ) 3,428 (34 ) CMOs issued by FHLMC — — 2,089 (15 ) 2,089 (15 ) CMOs issued by GNMA 2,570 (5 ) — — 2,570 (5 ) Debentures of government- sponsored agencies — — 9,949 (51 ) 9,949 (51 ) Privately issued CMOs — — 379 (2 ) 379 (2 ) Obligations of state & political subdivisions 9,867 (39 ) 582 (2 ) 10,449 (41 ) Total available-for-sale 34,077 (82 ) 16,427 (104 ) 50,504 (186 ) Total temporarily impaired securities $ 44,712 $ (97 ) $ 16,427 $ (104 ) $ 61,139 $ (201 ) December 31, 2014 < 12 continuous months ≥ 12 continuous months Total securities in a loss position (dollars in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Held-to-maturity Obligations of state & political subdivisions $ 5,830 $ (27 ) $ 359 $ (13 ) $ 6,189 $ (40 ) Corporate bonds 3,009 (1 ) 3,533 (24 ) 6,542 (25 ) Total held-to-maturity 8,839 (28 ) 3,892 (37 ) 12,731 (65 ) Available-for-sale MBS pass-through securities issued by FHLMC and FNMA 1,960 (11 ) — — 1,960 (11 ) CMOs issued by FNMA — — 4,115 (58 ) 4,115 (58 ) CMOs issued by FHLMC 17,157 (44 ) 2,291 (43 ) 19,448 (87 ) CMOs issued by GNMA 3,262 (16 ) — — 3,262 (16 ) Debentures of government- sponsored agencies 494 (1 ) 9,769 (231 ) 10,263 (232 ) Privately issued CMOs 817 (15 ) — — 817 (15 ) Obligations of state & political subdivisions 2,695 (3 ) 1,112 (5 ) 3,807 (8 ) Corporate bonds 1,002 (1 ) 990 (3 ) 1,992 (4 ) Total available-for-sale 27,387 (91 ) 18,277 (340 ) 45,664 (431 ) Total temporarily impaired securities $ 36,226 $ (119 ) $ 22,169 $ (377 ) $ 58,395 $ (496 )

Loans and Allowance for Loan 20

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Past Due Financing Receivables	Past due and non-accrual loans by class as of September 30, 2015 and December 31, 2014 were as follows: (dollars 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, 2015 30-59 days past due $ 1,780 $ 139 $ 421 $ — $ 862 $ — $ 7 $ 3,209 60-89 days past due 150 — — — 99 — 2 251 90 days or more past due 21 — — — 100 — 72 193 Total past due 1,951 139 421 — 1,061 — 81 3,653 Current 188,016 239,196 671,256 54,921 112,670 71,682 21,806 1,359,547 Total loans 3 $ 189,967 $ 239,335 $ 671,677 $ 54,921 $ 113,731 $ 71,682 $ 21,887 $ 1,363,200 Non-accrual 2 354 — 2,020 2 172 — 90 2,638 December 31, 2014 30-59 days past due $ 183 $ — $ — $ — $ 646 $ — $ 180 $ 1,009 Non-accrual 2 — 1,403 2,429 5,134 280 — 104 9,350 Total past due 183 1,403 2,429 5,134 926 — 284 10,359 Current 210,040 229,202 671,070 43,279 109,862 73,035 16,504 1,352,992 Total loans 3 $ 210,223 $ 230,605 $ 673,499 $ 48,413 $ 110,788 $ 73,035 $ 16,788 $ 1,363,351 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 $2 thousand of Purchased Credit Impaired ("PCI") loans that had stopped accreting interest at September 30, 2015 and $1.4 million at December 31, 2014 . Amounts exclude accreting PCI loans of $3.7 million and $3.8 million at September 30, 2015 and December 31, 2014 , 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. 3 Amounts include net deferred loan costs of $861 thousand and $487 thousand at September 30, 2015 and December 31, 2014 , respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $3.4 million and $4.4 million at September 30, 2015 and December 31, 2014 , 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, 2015 and December 31, 2014 : (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 Credit Risk Profile by Internally Assigned Grade: September 30, 2015 Pass $ 166,622 $ 216,017 $ 662,858 $ 51,680 $ 111,020 $ 71,596 $ 21,544 $ 3,249 $ 1,304,586 Special Mention 18,288 12,445 2,438 — 1,419 — — — 34,590 Substandard 4,873 9,184 4,651 3,238 1,224 86 343 425 24,024 Total loans $ 189,783 $ 237,646 $ 669,947 $ 54,918 $ 113,663 $ 71,682 $ 21,887 $ 3,674 $ 1,363,200 December 31, 2014 Pass $ 197,659 $ 205,820 $ 651,548 $ 41,710 $ 107,933 $ 70,987 $ 16,101 $ 2,210 $ 1,293,968 Special Mention 6,776 10,406 13,304 1,008 322 — 190 1,140 33,146 Substandard 5,464 11,763 6,473 5,684 2,466 2,048 497 1,842 36,237 Total loans $ 209,899 $ 227,989 $ 671,325 $ 48,402 $ 110,721 $ 73,035 $ 16,788 $ 5,192 $ 1,363,351
Troubled Debt Restructurings on Financing Receivables	The table below summarizes outstanding TDR loans by loan class as of September 30, 2015 and December 31, 2014 . The summary includes both TDRs that are on non-accrual status and those that continue to accrue interest. (in thousands) As of Recorded investment in Troubled Debt Restructurings 1 September 30, 2015 December 31, 2014 Commercial and industrial $ 4,098 $ 3,584 Commercial real estate, owner-occupied 6,993 8,459 Commercial real estate, investor 733 524 Construction 2 3,238 5,684 Home equity 463 694 Other residential 2,020 2,045 Installment and other consumer 1,367 1,713 Total $ 18,912 $ 22,703 1 Includes $18.8 million and $15.9 million of TDR loans that were accruing interest as of September 30, 2015 and December 31, 2014 , respectively. Includes $147 thousand and $1.8 million of acquired loans at September 30, 2015 and December 31, 2014 , respectively. 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 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 paid-off and fully charged-off TDR loans. (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, 2015: Commercial and industrial 1 $ 700 $ 700 $ 700 Total 1 $ 700 $ 700 $ 700 Troubled Debt Restructurings during the three months ended September 30, 2014: Commercial and industrial 2 $ 513 $ 596 $ 596 Commercial real estate, owner occupied 1 4,226 4,216 4,206 Commercial real estate, investor 1 74 74 74 Construction 1 815 814 814 Total 5 $ 5,628 $ 5,700 $ 5,690 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 Troubled Debt Restructurings during the nine months ended September 30, 2014: Commercial and industrial 1 7 $ 1,336 $ 1,460 $ 1,431 Commercial real estate, owner-occupied 1 4,226 4,216 4,206 Other residential 1 815 814 814 Home equity 2 224 224 222 Installment and other consumer 6 281 278 270 Total 17 $ 6,882 $ 6,992 $ 6,943 1 Excludes one contract modified and subsequently paid off during the nine months ended September 30, 2014 in the amount of $905 thousand pre-modification and post-modification.
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, 2015 Recorded investment in impaired loans: With no specific allowance recorded $ 2,108 $ 2,882 $ 2,537 $ 2,688 $ 171 $ 1,220 $ 329 $ 11,935 With a specific allowance recorded 2,343 4,111 217 552 391 800 1,128 9,542 Total recorded investment in impaired loans $ 4,451 $ 6,993 $ 2,754 $ 3,240 $ 562 $ 2,020 $ 1,457 $ 21,477 Unpaid principal balance of impaired loans: With no specific allowance recorded $ 2,105 $ 2,882 $ 4,528 $ 2,688 $ 171 $ 1,220 $ 329 $ 13,923 With a specific allowance recorded 2,398 4,111 217 674 391 800 1,128 9,719 Total unpaid principal balance of impaired loans $ 4,503 $ 6,993 $ 4,745 $ 3,362 $ 562 $ 2,020 $ 1,457 $ 23,642 Specific allowance $ 935 $ 55 $ — $ 3 $ 3 $ 71 $ 121 $ 1,188 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 Average recorded investment in impaired loans during the quarter ended September 30, 2014 $ 5,292 $ 6,982 $ 3,090 $ 6,678 $ 857 $ 1,440 $ 1,847 $ 26,186 Interest income recognized on impaired loans during the quarter ended September 30, 2014 $ 88 $ 54 $ 7 $ 23 $ 5 $ 14 $ 19 $ 210 Average recorded investment in impaired loans during the nine months ended September 30, 2014 $ 5,818 $ 5,980 $ 3,186 $ 6,568 $ 730 $ 1,726 $ 1,876 $ 25,884 Interest income recognized on impaired loans during the nine months ended September 30, 2014 $ 309 $ 220 $ 21 $ 67 $ 14 $ 56 $ 56 $ 743 (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, 2014 Recorded investment in impaired loans: With no specific allowance recorded $ 1,141 $ 5,577 $ 2,954 $ 5,134 $ 393 $ 1,026 $ 239 $ 16,464 With a specific allowance recorded 2,443 2,882 — 561 300 1,019 1,554 $ 8,759 Total recorded investment in impaired loans $ 3,584 $ 8,459 $ 2,954 $ 5,695 $ 693 $ 2,045 $ 1,793 $ 25,223 Unpaid principal balance of impaired loans: With no specific allowance recorded $ 1,186 $ 6,577 $ 4,945 $ 7,824 $ 880 $ 1,026 $ 239 $ 22,677 With a specific allowance recorded 2,524 2,882 — 749 300 1,019 1,554 9,028 Total unpaid principal balance of impaired loans $ 3,710 $ 9,459 $ 4,945 $ 8,573 $ 1,180 $ 2,045 $ 1,793 $ 31,705 Specific allowance $ 694 $ 65 $ — $ 3 $ — $ 92 $ 284 $ 1,138 Average recorded investment in impaired loans during 2014 5,354 6,604 3,138 6,471 741 1,744 1,857 25,909 Interest income recognized on impaired loans during 2014 378 288 28 85 19 74 76 948
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 For the 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 For the 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 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 For the three months ended September 30, 2014 Allowance for loan losses: Beginning balance $ 3,125 $ 1,979 $ 6,713 $ 571 $ 944 $ 454 $ 481 $ 633 $ 14,900 Provision (reversal) (263 ) 9 (26 ) (33 ) (18 ) (8 ) 90 249 — Charge-offs — — — — — — (2 ) — (2 ) Recoveries 44 5 5 96 1 — — — 151 Ending balance $ 2,906 $ 1,993 $ 6,692 $ 634 $ 927 $ 446 $ 569 $ 882 $ 15,049 For the nine months ended September 30, 2014 Allowance for loan losses: Beginning balance $ 3,056 $ 2,012 $ 6,196 $ 633 $ 875 $ 317 $ 629 $ 506 $ 14,224 Provision (reversal) (208 ) (24 ) 455 109 49 129 (136 ) 376 750 Charge-offs (66 ) — — (204 ) — — (6 ) — (276 ) Recoveries 124 5 41 96 3 — 82 — 351 Ending balance $ 2,906 $ 1,993 $ 6,692 $ 634 $ 927 $ 446 $ 569 $ 882 $ 15,049 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 As of September 30, 2015: Ending ALLL related to loans collectively evaluated for impairment $ 1,781 $ 2,013 $ 6,084 $ 691 $ 850 $ 314 $ 355 $ 1,181 $ 13,269 Ending ALLL related to loans individually evaluated for impairment $ 928 $ 56 $ — $ — $ 3 $ 71 $ 121 $ — $ 1,179 Ending ALLL related to purchased credit-impaired loans $ 7 $ — $ — $ 2 $ — $ — $ — $ — $ 9 Total $ 2,716 $ 2,069 $ 6,084 $ 693 $ 853 $ 385 $ 476 $ 1,181 $ 14,457 Loans outstanding: Collectively evaluated for impairment $ 185,478 $ 230,653 $ 667,192 $ 51,681 $ 113,101 $ 69,662 $ 20,430 $ — $ 1,338,197 Individually evaluated for impairment 1 4,305 6,993 2,754 3,238 562 2,020 1,457 — 21,329 Purchased credit-impaired 184 1,689 1,731 2 68 — — — 3,674 Total $ 189,967 $ 239,335 $ 671,677 $ 54,921 $ 113,731 $ 71,682 $ 21,887 $ — $ 1,363,200 Ratio of allowance for loan losses to total loans 1.43 % 0.86 % 0.91 % 1.26 % 0.75 % 0.54 % 2.17 % NM 1.06 % Allowance for loan losses to non-accrual loans 767 % NM 301 % 347 % 496 % NM 481 % NM 548 % 1 Total excludes $147 thousand of PCI loans that have experienced 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 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 As of December 31, 2014: Ending ALLL related to loans collectively evaluated for impairment $ 2,143 $ 1,859 $ 6,672 $ 836 $ 859 $ 341 $ 282 $ 969 $ 13,961 Ending ALLL related to loans individually evaluated for impairment $ 690 $ 65 $ — $ — $ — $ 92 $ 284 $ — $ 1,131 Ending ALLL related to purchased credit-impaired loans $ 4 $ — $ — $ 3 $ — $ — $ — $ — $ 7 Total $ 2,837 $ 1,924 $ 6,672 $ 839 $ 859 $ 433 $ 566 $ 969 $ 15,099 Loans outstanding: Collectively evaluated for impairment $ 206,603 $ 220,933 $ 668,371 $ 42,718 $ 110,028 $ 70,990 $ 14,995 $ — $ 1,334,638 Individually evaluated for impairment 1 3,296 7,056 2,954 5,684 693 2,045 1,793 — 23,521 Purchased credit-impaired 324 2,616 2,174 11 67 — — — 5,192 Total $ 210,223 $ 230,605 $ 673,499 $ 48,413 $ 110,788 $ 73,035 $ 16,788 $ — $ 1,363,351 Ratio of allowance for loan losses to total loans 1.35 % 0.83 % 0.99 % 1.73 % 0.78 % 0.59 % 3.37 % NM 1.11 % Allowance for loan losses to non-accrual loans NM 137 % 275 % 16 % 307 % NM 544 % NM 161 % 1 Total excludes $1.7 million PCI loans that have experienced credit deterioration post-acquisition, which 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 reflects the outstanding balance and related carrying value of PCI loans as of September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 PCI Loans (in thousands) Unpaid principal balance Carrying value Unpaid principal balance Carrying value Commercial and industrial $ 258 $ 184 $ 479 $ 324 Commercial real estate 4,355 3,420 6,831 4,790 Construction 125 2 136 11 Home equity 227 68 232 67 Total purchased credit-impaired loans $ 4,965 $ 3,674 $ 7,678 $ 5,192
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 (dollars in thousands) September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Balance at beginning of period $ 3,711 $ 4,514 $ 4,027 $ 3,649 Removals 1 (837 ) — (914 ) (273 ) Accretion (128 ) (126 ) (367 ) (494 ) Reclassifications from nonaccretable difference 2 — (242 ) — 1,264 Balance at end of period $ 2,746 $ 4,146 $ 2,746 $ 4,146 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, 2015
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, 2015 : (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 (3.34% as of September 30, 2015), 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 (1.74% as of September 30, 2015), 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, 2015
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, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Cash dividends to common stockholders $ 1,316 $ 1,185 $ 3,936 $ 3,428 Cash dividends per common share $ 0.22 $ 0.20 $ 0.66 $ 0.58

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	At September 30, 2015 , the approximate minimum future commitments payable under non-cancelable contracts for leased premises are as follows: (in thousands) 2015 2016 2017 2018 2019 Thereafter Total Operating leases 1 $ 941 $ 3,763 $ 3,755 $ 3,784 $ 3,526 $ 6,678 $ 22,447 1 Minimum payments have not been reduced by minimum sublease rentals of $271 thousand due in the future under non- cancelable subleases.

Derivative Financial Instrume24

Derivative Financial Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2015
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, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Fair value hedges: Interest rate contracts notional amount $ — $ 4,589 $ 29,999 $ 26,899 Interest rate contracts fair value 1 $ — $ 61 $ 2,328 $ 1,996
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	Three months ended (in thousands) September 30, 2015 September 30, 2014 (Decrease) increase in value of designated interest rate swaps recognized in interest income $ (813 ) $ 21 Payment on interest rate swaps recorded in interest income (231 ) (251 ) Increase (decrease) in value of hedged loans recognized in interest income 905 (54 ) Decrease in value of yield maintenance agreement recognized against interest income (13 ) (15 ) Net loss on derivatives recognized against interest income 2 $ (152 ) $ (299 ) Nine months ended (in thousands) September 30, 2015 September 30, 2014 (Decrease) increase in value of designated interest rate swaps recognized in interest income $ (393 ) $ 334 Payment on interest rate swaps recorded in interest income (700 ) (755 ) Increase (decrease) in value of hedged loans recognized in interest income 453 (133 ) Decrease in value of yield maintenance agreement recognized against interest income (39 ) (77 ) Net loss on derivatives recognized against interest income 2 $ (679 ) $ (631 ) 1 See Note 3 for valuation methodology. 2 Includes hedge ineffectiveness gain of $79 thousand and loss of $48 thousand for the quarters ended September 30, 2015 and September 30, 2014 , respectively. Ineffectiveness gain of $21 thousand and $125 thousand was recorded in interest income during the nine months ended September 30, 2015 and September 30, 2014 , 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 offset the change in the fair value of the hedged items.
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 (in thousands) Gross Amounts Not Offset in the Statements of Condition Gross Amounts Net Amounts Gross Amounts Offset in the of Assets Presented of Recognized Statements of in the Statements Financial Cash Collateral Assets 1 Condition of Condition 1 Instruments Received Net Amount As of September 30, 2015 Derivatives by Counterparty Counterparty A $ — $ — $ — $ — $ — $ — Counterparty B — — — — — — Total $ — $ — $ — $ — $ — $ — As of December 31, 2014 Derivatives by Counterparty Counterparty A $ 61 $ — $ 61 $ (61 ) $ — $ — Counterparty B — — — — — — Total $ 61 $ — $ 61 $ (61 ) $ — $ — 1 Amounts exclude accrued interest totaling zero and $1 thousand at September 30, 2015 and December 31, 2014 , respectively.
Offsetting Liabilities	Offsetting of Financial Liabilities and Derivative Liabilities (in thousands) Gross Amounts Not Offset in the Statements of Condition Gross Amounts Net Amounts of Gross Amounts Offset in the Liabilities Presented of Recognized Statements of in the Statements of Financial Cash Collateral Liabilities 2 Condition Condition 2 Instruments Pledged Net Amount As of September 30, 2015 Derivatives by Counterparty Counterparty A $ 2,001 $ — $ 2,001 $ — $ (2,001 ) $ — Counterparty B 327 — 327 — (327 ) — Total $ 2,328 $ — $ 2,328 $ — $ (2,328 ) $ — As of December 31, 2014 Derivatives by Counterparty Counterparty A $ 1,616 $ — $ 1,616 $ (61 ) $ (1,360 ) $ 195 Counterparty B 380 — 380 — (380 ) — Total $ 1,996 $ — $ 1,996 $ (61 ) $ (1,740 ) $ 195 2 Amounts exclude accrued interest totaling $34 thousand and $40 thousand at September 30, 2015 and December 31, 2014 , 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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (shares)	5,963	5,903	5,943	5,887
Add: Potentially dilutive common shares related to stock options (shares)	35	41	41	42
Potential common shares related to unvested restricted stock (shares)	5	4	5	4
Potential common shares related to warrants (shares)	64	66	70	63
Weighted average diluted shares outstanding (shares)	6,067	6,014	6,059	5,996
Net income	$ 4,773	$ 5,378	$ 13,516	$ 15,079	$ 19,771
Basic EPS (usd per share)	$ 0.80	$ 0.91	$ 2.27	$ 2.56
Diluted EPS (usd per share)	$ 0.79	$ 0.89	$ 2.23	$ 2.51
Weighted average anti-dilutive shares not included in the calculation of diluted EPS	42	51	35	48

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, 2015USD ($)security	Dec. 31, 2014USD ($)security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	$ 333,856	$ 200,848
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
Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase in unrealized gain due to transfers to Level 3	$ (8)
Debentures of government sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	102,165	$ 14,557
Privately-issued collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	4,891	7,294
Obligations of state and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	50,377	15,880
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, Fair Value	5,006	4,998
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)		61
Derivative financial liabilities (interest rate contracts)	2,328	1,996
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)		61
Derivative financial liabilities (interest rate contracts)	2,328	1,996
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	171,417	158,119
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	169,677	155,421
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	1,740	2,698
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	102,165	14,557
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	102,165	14,557
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	4,891	7,294
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	4,891	7,294
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	50,377	15,880
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	50,377	15,771
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	5,006	4,998
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	5,006	5,437
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, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer	$ 21,477	$ 25,223
Specific valuation allowance for impaired loans	$ 1,188	1,138
Discount rate for selling costs applied to all properties	6.00%
Changed in estimated value of OREO	$ 40
Consumer loans | Consumer loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer		77
Specific valuation allowance for impaired loans		26
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]
Other real estate	0	0
Financial instruments at fair value measured on a nonrecurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer		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]
Other real estate	0	0
Financial instruments at fair value measured on a nonrecurring basis | Significant Other Observable Inputs (Level 2) | Consumer loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer		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]
Other real estate	421	461
Financial instruments at fair value measured on a nonrecurring basis | Significant Unobservable Inputs (Level 3) | Consumer loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer		77
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]
Other real estate	$ 421	461
Financial instruments at fair value measured on a nonrecurring basis | Carrying Value | Consumer loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, installment and other consumer		$ 77

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, 2015USD ($)debenture	Dec. 31, 2014USD ($)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	$ 88,104	$ 118,643
Subordinated Debt [Abstract]
Number of subordinated debentures acquired | debenture	2
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	$ 35,315	41,367
Carrying Value | Fair Value Hierarchy, Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	86,471	116,437
Interest receivable	5,606	5,909
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Deposits	1,635,482	1,551,619
Federal Home Loan Bank borrowings	15,000	15,000
Interest payable	200	213
Carrying Value | Fair Value Hierarchy, Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans, net	1,348,743	1,348,252
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Subordinated debentures	5,343	5,185
Fair Value | Fair Value Hierarchy, Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	35,315	41,367
Fair Value | Fair Value Hierarchy, Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investment securities held to maturity	88,104	118,643
Interest receivable	5,606	5,909
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Deposits	1,636,088	1,552,446
Federal Home Loan Bank borrowings	15,437	15,484
Interest payable	200	213
Fair Value | Fair Value Hierarchy, Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans, net	1,364,940	1,361,244
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Subordinated debentures	$ 5,178	$ 5,290

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	$ 86,471	$ 116,437
Held to maturity, Fair Value	88,104	118,643
Held-to-maturity, Gross Unrealized Gains	1,648	2,271
Held-to-maturity, Gross Unrealized Losses	(15)	(65)
Available-for-sale, Amortized Cost	331,024	199,045
Available-for-sale, Fair Value	333,856	200,848
Available-for-sale, Gross Unrealized Gains	3,018	2,234
Available-for-sale, Gross Unrealized Losses	(186)	(431)
Total investment securities, Amortized Cost	417,495	315,482
Total investment securities, Fair Value	421,960	319,491
Total investment securities, Gross Unrealized Gains	4,666	4,505
Total investment securities, Gross Unrealized Losses	(201)	(496)
Mortgage-backed Securities, Issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	116,513	92,963
Available-for-sale, Fair Value	117,963	94,214
Available-for-sale, Gross Unrealized Gains	1,488	1,262
Available-for-sale, Gross Unrealized Losses	(38)	(11)
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	16,211	14,771
Available-for-sale, Fair Value	16,385	14,790
Available-for-sale, Gross Unrealized Gains	208	77
Available-for-sale, Gross Unrealized Losses	(34)	(58)
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	24,645	31,238
Available-for-sale, Fair Value	24,869	31,260
Available-for-sale, Gross Unrealized Gains	239	109
Available-for-sale, Gross Unrealized Losses	(15)	(87)
CMOs issued by GNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	11,951	17,573
Available-for-sale, Fair Value	12,200	17,855
Available-for-sale, Gross Unrealized Gains	254	298
Available-for-sale, Gross Unrealized Losses	(5)	(16)
Debentures of government sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	101,987	14,694
Available-for-sale, Fair Value	102,165	14,557
Available-for-sale, Gross Unrealized Gains	229	95
Available-for-sale, Gross Unrealized Losses	(51)	(232)
Privately-issued CMOs
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	4,700	7,137
Available-for-sale, Fair Value	4,891	7,294
Available-for-sale, Gross Unrealized Gains	193	172
Available-for-sale, Gross Unrealized Losses	(2)	(15)
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	50,073	15,733
Available-for-sale, Fair Value	50,377	15,880
Available-for-sale, Gross Unrealized Gains	345	155
Available-for-sale, Gross Unrealized Losses	(41)	(8)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available-for-sale, Amortized Cost	4,944	4,936
Available-for-sale, Fair Value	5,006	4,998
Available-for-sale, Gross Unrealized Gains	62	66
Available-for-sale, Gross Unrealized Losses	0	(4)
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	50,570	63,425
Held to maturity, Fair Value	51,867	65,121
Held-to-maturity, Gross Unrealized Gains	1,302	1,736
Held-to-maturity, Gross Unrealized Losses	(5)	(40)
Corporate bonds
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, Amortized Cost	23,578	40,257
Held to maturity, Fair Value	23,662	40,448
Held-to-maturity, Gross Unrealized Gains	87	216
Held-to-maturity, Gross Unrealized Losses	(3)	(25)
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	12,323	12,755
Held to maturity, Fair Value	12,575	13,074
Held-to-maturity, Gross Unrealized Gains	259	319
Held-to-maturity, Gross Unrealized Losses	$ (7)	$ 0

Investment Securities - Maturit

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Held to Maturity, Amortized Cost, Within one year	$ 34,325	$ 39,778
Held to Maturity, Amortized Cost, After one but within five years	31,072	50,983
Held to Maturity, Amortized Cost, After five years through ten years	9,876	11,679
Held to Maturity, Amortized Cost, After ten years	11,198	13,997
Held to Maturity, Amortized Cost, Total	86,471	116,437
Available for Sale Securities, Amortized Cost, Within one year	11,955	2,378
Available for Sale, Amortized Cost, After one but within five years	127,221	43,866
Available for Sale, Amortized Cost, After five years through ten years	51,686	9,644
Available for Sale, Amortized Cost, After ten years	140,162	143,157
Available for Sale, Amortized Cost, Total	331,024	199,045
Held to Maturity, Fair Value, Within one year	34,459	39,913
Held to Maturity, Fair Value, After one but within five years	31,821	51,953
Held to Maturity, Fair Value, After five years through ten years	10,352	12,426
Held to Maturity, Fair Value, After ten years	11,472	14,351
Held to maturity, Fair Value	88,104	118,643
Available for Sale, Fair Value, Within one year	12,019	2,388
Available for Sale, Fair Value, After one but within five years	127,607	43,919
Available for Sale, Fair Value, After five years through ten years	51,885	9,749
Available for Sale, Fair Value, After ten years	142,345	144,792
Available for Sale, Fair Value, Total	$ 333,856	$ 200,848

Investment Securities - Securit

Investment Securities - Securities Sold and Pledged as Collateral (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Available-for-sale:
Sales proceeds	$ 0	$ 413	$ 1,559	$ 2,435
Gross realized gains	0	4	8	4
Gross realized (losses)	0	0	0	(15)
Held-to-maturity:
Sales proceeds	1,015	0	1,015	2,146
Gross realized gains	72	0	72	104
Gross realized (losses)	0	$ 0	0	$ 0
State of California
Held-to-maturity:
Available-for-sale securities pledged as collateral	66,000		66,000		$ 74,700
Public Deposits
Held-to-maturity:
Available-for-sale securities pledged as collateral	65,200		65,200		73,800
Trust Deposits
Held-to-maturity:
Available-for-sale securities pledged as collateral	844		844		856
Internal checking account
Held-to-maturity:
Available-for-sale securities pledged as collateral	$ 1,100		$ 1,100		$ 1,100

Investment Securities - Investm

Investment Securities - Investment Securities in Unrealized Loss Positions (Details) $ in Thousands	Sep. 30, 2015USD ($)security	Dec. 31, 2014USD ($)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	29	28
Held-to-maturity, less than 12 continuous months, Fair value	$ 10,635	$ 8,839
Held-to-maturity, less than 12 continuous months, Unrealized loss	(15)	(28)
Held-to-maturity, greater than 12 continuous months, Fair value	0	3,892
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	(37)
Held-to-maturity, Total Securities in a loss position, Fair value	10,635	12,731
Held-to-maturity, Gross Unrealized Losses	(15)	(65)
Available-for-sale, less than 12 continuous months, Fair value	34,077	27,387
Available-for-sale, less than 12 continuous months, Unrealized loss	(82)	(91)
Available-for-sale, greater than 12 continuous months, Fair value	16,427	18,277
Available-for-sale, greater than 12 continuous months, Unrealized loss	(104)	(340)
Available-for-sale, Total Securities in a loss position, Fair Value	50,504	45,664
Available-for-sale, Total Securities in a loss position, Unrealized loss	(186)	(431)
Marketable securities, less than 12 continuous months, Fair value	44,712	36,226
Marketable securities, less than 12 continuous months, Unrealized loss	(97)	(119)
Marketable securities, greater than 12 continuous months, Fair value	16,427	22,169
Marketable securities, greater than 12 continuous months, Unrealized loss	(104)	(377)
Marketable securities, Total Securities in a loss position, Fair value	61,139	58,395
Marketable securities, Total Securities in a loss position, Unrealized loss	$ (201)	(496)
Number of investment securities in unrealized loss position longer than 12 months | security	6
Number of investment securities in unrealized loss position less than 12 months | security	23
Mortgage-backed 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	$ 21,640	1,960
Available-for-sale, less than 12 continuous months, Unrealized loss	(38)	(11)
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	21,640	1,960
Available-for-sale, Total Securities in a loss position, Unrealized loss	(38)	(11)
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	0	0
Available-for-sale, less than 12 continuous months, Unrealized loss	0	0
Available-for-sale, greater than 12 continuous months, Fair value	3,428	4,115
Available-for-sale, greater than 12 continuous months, Unrealized loss	(34)	(58)
Available-for-sale, Total Securities in a loss position, Fair Value	3,428	4,115
Available-for-sale, Total Securities in a loss position, Unrealized loss	(34)	(58)
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	17,157
Available-for-sale, less than 12 continuous months, Unrealized loss	0	(44)
Available-for-sale, greater than 12 continuous months, Fair value	2,089	2,291
Available-for-sale, greater than 12 continuous months, Unrealized loss	(15)	(43)
Available-for-sale, Total Securities in a loss position, Fair Value	2,089	19,448
Available-for-sale, Total Securities in a loss position, Unrealized loss	(15)	(87)
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	2,570	3,262
Available-for-sale, less than 12 continuous months, Unrealized loss	(5)	(16)
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	2,570	3,262
Available-for-sale, Total Securities in a loss position, Unrealized loss	(5)	(16)
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	0	494
Available-for-sale, less than 12 continuous months, Unrealized loss	0	(1)
Available-for-sale, greater than 12 continuous months, Fair value	9,949	9,769
Available-for-sale, greater than 12 continuous months, Unrealized loss	(51)	(231)
Available-for-sale, Total Securities in a loss position, Fair Value	9,949	10,263
Available-for-sale, Total Securities in a loss position, Unrealized loss	(51)	(232)
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	0	817
Available-for-sale, less than 12 continuous months, Unrealized loss	0	(15)
Available-for-sale, greater than 12 continuous months, Fair value	379	0
Available-for-sale, greater than 12 continuous months, Unrealized loss	(2)	0
Available-for-sale, Total Securities in a loss position, Fair Value	379	817
Available-for-sale, Total Securities in a loss position, Unrealized loss	(2)	(15)
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	9,867
Available-for-sale, less than 12 continuous months, Unrealized loss	(39)
Available-for-sale, greater than 12 continuous months, Fair value	582
Available-for-sale, greater than 12 continuous months, Unrealized loss	(2)
Available-for-sale, Total Securities in a loss position, Fair Value	10,449
Available-for-sale, Total Securities in a loss position, Unrealized loss	(41)
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	2,751	5,830
Held-to-maturity, less than 12 continuous months, Unrealized loss	(5)	(27)
Held-to-maturity, greater than 12 continuous months, Fair value	0	359
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	(13)
Held-to-maturity, Total Securities in a loss position, Fair value	2,751	6,189
Held-to-maturity, Gross Unrealized Losses	(5)	(40)
Available-for-sale, less than 12 continuous months, Fair value		2,695
Available-for-sale, less than 12 continuous months, Unrealized loss		(3)
Available-for-sale, greater than 12 continuous months, Fair value		1,112
Available-for-sale, greater than 12 continuous months, Unrealized loss		(5)
Available-for-sale, Total Securities in a loss position, Fair Value		3,807
Available-for-sale, Total Securities in a loss position, Unrealized loss		(8)
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	5,540	3,009
Held-to-maturity, less than 12 continuous months, Unrealized loss	(3)	(1)
Held-to-maturity, greater than 12 continuous months, Fair value	0	3,533
Held-to-maturity, greater than 12 continuous months, Unrealized loss	0	(24)
Held-to-maturity, Total Securities in a loss position, Fair value	5,540	6,542
Held-to-maturity, Gross Unrealized Losses	(3)	(25)
Available-for-sale, less than 12 continuous months, Fair value		1,002
Available-for-sale, less than 12 continuous months, Unrealized loss		(1)
Available-for-sale, greater than 12 continuous months, Fair value		990
Available-for-sale, greater than 12 continuous months, Unrealized loss		(3)
Available-for-sale, Total Securities in a loss position, Fair Value		1,992
Available-for-sale, Total Securities in a loss position, Unrealized loss		(4)
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	2,344
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	2,344
Held-to-maturity, Gross Unrealized Losses	$ (7)	$ 0

Investment Securities - Non-Mar

Investment Securities - Non-Marketable Securities (Details)	9 Months Ended
	Sep. 30, 2015USD ($)$ / sharesshares	Oct. 28, 2015	Dec. 31, 2014USD ($)
Schedule of Cost-method Investments [Line Items]
Federal Home Loan Bank stock, par value | $ / shares	$ 100
Investments in low income housing tax credit funds	$ 2,700,000		$ 1,800,000
Low income housing tax credits and other tax benefits	169,000
Low income housing amortization expense	131,000
Unfunded commitments for low income housing tax credit funds	$ 1,800,000
Visa Inc. | Visa Inc. Class B common stock
Schedule of Cost-method Investments [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio	1.6483
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	1,900,000		1,800,000
Subsequent event
Schedule of Cost-method Investments [Line Items]
Federal Home Loan Bank, dividend rate percentage		8.79%
Other assets
Schedule of Cost-method Investments [Line Items]
Federal Home Loan Bank stock	$ 8,400,000		$ 8,200,000

Loans and Allowance for Loan 34

Loans and Allowance for Loan Losses - Loans Outstanding and Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 3,653	$ 10,359
Current	1,359,547	1,352,992
Total loans	1,363,200	1,363,351
Financing Receivable, Recorded Investment, Nonaccrual Status	2,638	9,350
Purchased Credit Impaired (PCI) loans no longer accreting interest	2	1,400
Purchased Credit-impaired (PCI) loans accreting interest	3,700	3,800
Deferred loan fees	861	487
Unaccreted purchase discounts on non-PCI loans	3,400	4,400
30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	3,209	1,009
60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	251
90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	193
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	1,951	183
Current	188,016	210,040
Total loans	189,967	210,223
Financing Receivable, Recorded Investment, Nonaccrual Status	354	0
Commercial loans | Commercial and industrial | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	1,780	183
Commercial loans | Commercial and industrial | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	150
Commercial loans | Commercial and industrial | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	21
Commercial real estate loans | Commercial real estate, owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	139	1,403
Current	239,196	229,202
Total loans	239,335	230,605
Financing Receivable, Recorded Investment, Nonaccrual Status	0	1,403
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	139	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
Commercial real estate loans | Commercial real estate, owner-occupied | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0
Commercial real estate loans | Commercial real estate, investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	421	2,429
Current	671,256	671,070
Total loans	671,677	673,499
Financing Receivable, Recorded Investment, Nonaccrual Status	2,020	2,429
Commercial real estate loans | Commercial real estate, investor | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	421	0
Commercial real estate loans | Commercial real estate, investor | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0
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
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	5,134
Current	54,921	43,279
Total loans	54,921	48,413
Financing Receivable, Recorded Investment, Nonaccrual Status	2	5,134
Commercial real estate loans | Construction | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Commercial real estate loans | Construction | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0
Commercial real estate loans | Construction | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	1,061	926
Current	112,670	109,862
Total loans	113,731	110,788
Financing Receivable, Recorded Investment, Nonaccrual Status	172	280
Residential loans | Home equity | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	862	646
Residential loans | Home equity | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	99
Residential loans | Home equity | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	100
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0	0
Current	71,682	73,035
Total loans	71,682	73,035
Financing Receivable, Recorded Investment, Nonaccrual Status	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
Residential loans | Other residential | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	81	284
Current	21,806	16,504
Total loans	21,887	16,788
Financing Receivable, Recorded Investment, Nonaccrual Status	90	104
Consumer loans | Installment and other consumer | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	7	$ 180
Consumer loans | Installment and other consumer | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	2
Consumer loans | Installment and other consumer | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 72

Loans and Allowance for Loan 35

Loans and Allowance for Loan Losses - Credit Quality of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,363,200	$ 1,363,351
Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	3,674	5,192
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,304,586	1,293,968
Pass | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	3,249	2,210
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	34,590	33,146
Special Mention | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	0	1,140
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	24,024	36,237
Substandard | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	425	1,842
Commercial loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	189,783	209,899
Total loans	189,967	210,223
Commercial loans | Commercial and industrial | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	184	324
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	166,622	197,659
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	18,288	6,776
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	4,873	5,464
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	237,646	227,989
Total loans	239,335	230,605
Commercial real estate loans | Commercial real estate, owner-occupied | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,689	2,616
Commercial real estate loans | Commercial real estate, owner-occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	216,017	205,820
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	12,445	10,406
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	9,184	11,763
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	669,947	671,325
Total loans	671,677	673,499
Commercial real estate loans | Commercial real estate, investor | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	1,731	2,174
Commercial real estate loans | Commercial real estate, investor | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	662,858	651,548
Commercial real estate loans | Commercial real estate, investor | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	2,438	13,304
Commercial real estate loans | Commercial real estate, investor | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	4,651	6,473
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	54,918	48,402
Total loans	54,921	48,413
Commercial real estate loans | Construction | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	2	11
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	51,680	41,710
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	0	1,008
Commercial real estate loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	3,238	5,684
Residential loans | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	113,663	110,721
Total loans	113,731	110,788
Residential loans | Home equity | Purchase credit-impaired
Financing Receivable, Recorded Investment [Line Items]
Purchase credit-impaired	68	67
Residential loans | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	111,020	107,933
Residential loans | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,419	322
Residential loans | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans excluding purchased credit-impaired loans	1,224	2,466
Residential loans | Other residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,682	73,035
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	71,596	70,987
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	86	2,048
Consumer loans | Installment and other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	21,887	16,788
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	21,544	16,101
Consumer loans | Installment and other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	190
Consumer loans | Installment and other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 343	$ 497

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		12 Months Ended
	Jun. 30, 2015USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)loans	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans removed from TDR designation | loans				4
Loans removed from TDR designation, recorded investment				$ 1,400,000		$ 0
Recorded investment in Troubled Debt Restructurings		$ 18,912,000		18,912,000		22,703,000
TDR loans accruing interest as of period end		18,800,000		18,800,000		15,900,000
TDR loans acquired		147,000		147,000		1,800,000
Charge-off to allowance for loan losses		3,000	$ 2,000	856,000	$ 276,000
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		4,098,000		4,098,000		3,584,000
Charge-off to allowance for loan losses		2,000	0	5,000	66,000
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		8,459,000
Charge-off to allowance for loan losses		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		733,000		733,000		524,000
Charge-off to allowance for loan losses		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		5,684,000
Loan value transferred to held-for-sale	$ 1,500,000
Charge-off to allowance for loan losses	$ 839,000	0	0	839,000	204,000
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		463,000		463,000		694,000
Charge-off to allowance for loan losses		0	0	0	0
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		2,020,000		2,020,000		2,045,000
Charge-off to allowance for loan losses		0	0	0	0
Consumer loans | Installment and other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in Troubled Debt Restructurings		1,367,000		1,367,000		$ 1,713,000
Charge-off to allowance for loan losses		$ 1,000	$ 2,000	$ 12,000	$ 6,000

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, 2015USD ($)contract	Sep. 30, 2014USD ($)contract	Sep. 30, 2015USD ($)loanscontract	Sep. 30, 2014USD ($)loanscontract
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract	1	5	6	17
Pre-Modification Outstanding Recorded Investment	$ 700	$ 5,628	$ 1,704	$ 6,882
Post-Modification Outstanding Recorded Investment	700	5,700	1,803	6,992
Post-Modification Outstanding Recorded Investment at period end	$ 700	$ 5,690	$ 1,680	6,943
Pre-modification contract amount that subsequently paid off				905
Post-modification contract amount that subsequently paid off				$ 905
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	1	2	5	7
Pre-Modification Outstanding Recorded Investment	$ 700	$ 513	$ 1,482	$ 1,336
Post-Modification Outstanding Recorded Investment	700	596	1,582	1,460
Post-Modification Outstanding Recorded Investment at period end	$ 700	$ 596	$ 1,463	$ 1,431
Commercial loans | Commercial real estate, owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract				1
Pre-Modification Outstanding Recorded Investment				$ 4,226
Post-Modification Outstanding Recorded Investment				4,216
Post-Modification Outstanding Recorded Investment at period end				$ 4,206
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract		1
Pre-Modification Outstanding Recorded Investment		$ 4,226
Post-Modification Outstanding Recorded Investment		4,216
Post-Modification Outstanding Recorded Investment at period end		$ 4,206
Commercial real estate loans | Commercial real estate, investor
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract		1	1
Pre-Modification Outstanding Recorded Investment		$ 74	$ 222
Post-Modification Outstanding Recorded Investment		74	221
Post-Modification Outstanding Recorded Investment at period end		$ 74	$ 217
Commercial real estate loans | Construction
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract		1
Pre-Modification Outstanding Recorded Investment		$ 815
Post-Modification Outstanding Recorded Investment		814
Post-Modification Outstanding Recorded Investment at period end		$ 814
Residential loans | Other residential
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract				1
Pre-Modification Outstanding Recorded Investment				$ 815
Post-Modification Outstanding Recorded Investment				814
Post-Modification Outstanding Recorded Investment at period end				$ 814
Residential loans | Home equity
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract				2
Pre-Modification Outstanding Recorded Investment				$ 224
Post-Modification Outstanding Recorded Investment				224
Post-Modification Outstanding Recorded Investment at period end				$ 222
Consumer loans | Installment and other consumer
Financing Receivable, Modifications [Line Items]
Number of Contracts Modified | contract				6
Pre-Modification Outstanding Recorded Investment				$ 281
Post-Modification Outstanding Recorded Investment				278
Post-Modification Outstanding Recorded Investment at period end				$ 270

Loans and Allowance for Loan 38

Loans and Allowance for Loan Losses - Impaired Loans and Related Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Recorded investment in impaired loans:
With no specific allowance recorded	$ 11,935		$ 11,935		$ 16,464
With a specific allowance recorded	9,542		9,542		8,759
Total recorded investment in impaired loans	21,477		21,477		25,223
Unpaid principal balance of impaired loans:
With no specific allowance recorded	13,923		13,923		22,677
With a specific allowance recorded	9,719		9,719		9,028
Total unpaid principal balance of impaired loans	23,642		23,642		31,705
Specific valuation	1,188		1,188		1,138
Average recorded investment in impaired loans during the period	22,390	$ 26,186	23,921	$ 25,884	25,909
Interest income recognized on impaired loans during the period ended	217	210	602	743	948
Charged-off portion of impaired loans	2,700		2,700
Outstanding commitments to extend credit on impaired loans	857		857		1,400
Commercial loans | Commercial and industrial
Recorded investment in impaired loans:
With no specific allowance recorded	2,108		2,108		1,141
With a specific allowance recorded	2,343		2,343		2,443
Total recorded investment in impaired loans	4,451		4,451		3,584
Unpaid principal balance of impaired loans:
With no specific allowance recorded	2,105		2,105		1,186
With a specific allowance recorded	2,398		2,398		2,524
Total unpaid principal balance of impaired loans	4,503		4,503		3,710
Specific valuation	935		935		694
Average recorded investment in impaired loans during the period	4,473	5,292	4,121	5,818	5,354
Interest income recognized on impaired loans during the period ended	58	88	176	309	378
Commercial real estate loans | Commercial real estate, owner-occupied
Recorded investment in impaired loans:
With no specific allowance recorded	2,882		2,882		5,577
With a specific allowance recorded	4,111		4,111		2,882
Total recorded investment in impaired loans	6,993		6,993		8,459
Unpaid principal balance of impaired loans:
With no specific allowance recorded	2,882		2,882		6,577
With a specific allowance recorded	4,111		4,111		2,882
Total unpaid principal balance of impaired loans	6,993		6,993		9,459
Specific valuation	55		55		65
Average recorded investment in impaired loans during the period	7,695	6,982	8,183	5,980	6,604
Interest income recognized on impaired loans during the period ended	84	54	228	220	288
Commercial real estate loans | Commercial real estate, investor
Recorded investment in impaired loans:
With no specific allowance recorded	2,537		2,537		2,954
With a specific allowance recorded	217		217		0
Total recorded investment in impaired loans	2,754		2,754		2,954
Unpaid principal balance of impaired loans:
With no specific allowance recorded	4,528		4,528		4,945
With a specific allowance recorded	217		217		0
Total unpaid principal balance of impaired loans	4,745		4,745		4,945
Specific valuation	0		0		0
Average recorded investment in impaired loans during the period	2,886	3,090	2,916	3,186	3,138
Interest income recognized on impaired loans during the period ended	10	7	24	21	28
Commercial real estate loans | Construction
Recorded investment in impaired loans:
With no specific allowance recorded	2,688		2,688		5,134
With a specific allowance recorded	552		552		561
Total recorded investment in impaired loans	3,240		3,240		5,695
Unpaid principal balance of impaired loans:
With no specific allowance recorded	2,688		2,688		7,824
With a specific allowance recorded	674		674		749
Total unpaid principal balance of impaired loans	3,362		3,362		8,573
Specific valuation	3		3		3
Average recorded investment in impaired loans during the period	3,262	6,678	4,473	6,568	6,471
Interest income recognized on impaired loans during the period ended	22	23	40	67	85
Residential loans | Home equity
Recorded investment in impaired loans:
With no specific allowance recorded	171		171		393
With a specific allowance recorded	391		391		300
Total recorded investment in impaired loans	562		562		693
Unpaid principal balance of impaired loans:
With no specific allowance recorded	171		171		880
With a specific allowance recorded	391		391		300
Total unpaid principal balance of impaired loans	562		562		1,180
Specific valuation	3		3		0
Average recorded investment in impaired loans during the period	610	857	616	730	741
Interest income recognized on impaired loans during the period ended	5	5	14	14	19
Residential loans | Other residential
Recorded investment in impaired loans:
With no specific allowance recorded	1,220		1,220		1,026
With a specific allowance recorded	800		800		1,019
Total recorded investment in impaired loans	2,020		2,020		2,045
Unpaid principal balance of impaired loans:
With no specific allowance recorded	1,220		1,220		1,026
With a specific allowance recorded	800		800		1,019
Total unpaid principal balance of impaired loans	2,020		2,020		2,045
Specific valuation	71		71		92
Average recorded investment in impaired loans during the period	2,025	1,440	2,033	1,726	1,744
Interest income recognized on impaired loans during the period ended	23	14	69	56	74
Consumer loans | Installment and other consumer
Recorded investment in impaired loans:
With no specific allowance recorded	329		329		239
With a specific allowance recorded	1,128		1,128		1,554
Total recorded investment in impaired loans	1,457		1,457		1,793
Unpaid principal balance of impaired loans:
With no specific allowance recorded	329		329		239
With a specific allowance recorded	1,128		1,128		1,554
Total unpaid principal balance of impaired loans	1,457		1,457		1,793
Specific valuation	121		121		284
Average recorded investment in impaired loans during the period	1,439	1,847	1,579	1,876	1,857
Interest income recognized on impaired loans during the period ended	$ 15	$ 19	$ 51	$ 56	$ 76

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		$ 14,354	$ 14,900	$ 15,099	$ 14,224
Provision for loan losses		0	0	0	750
Charge-offs		(3)	(2)	(856)	(276)
Recoveries		106	151	214	351
Ending balance	$ 14,354	14,457	15,049	14,457	15,049
Ending ALLL related to loans collectively evaluated for impairment		13,269		13,269		$ 13,961
Ending ALLL related to loans individually evaluated for impairment		1,179		1,179		1,131
Ending ALLL related to purchased credit-impaired loans		14,457		14,457		15,099
Collectively evaluated for impairment		1,338,197		1,338,197		1,334,638
Individually evaluated for impairment		21,329		21,329		23,521
Total loans		$ 1,363,200		$ 1,363,200		$ 1,363,351
Ratio of allowance for loan losses to total loans		1.06%		1.06%		1.11%
Allowance for loan losses to non-accrual loans		548.00%		548.00%		161.00%
PCI loans impaired post-acquisition		$ 147		$ 147		$ 1,700
Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		9		9		7
Purchase credit-impaired		3,674		3,674		5,192
Commercial loans | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		2,540	3,125	2,837	3,056
Provision for loan losses		86	(263)	(306)	(208)
Charge-offs		(2)	0	(5)	(66)
Recoveries		92	44	190	124
Ending balance	2,540	2,716	2,906	2,716	2,906
Ending ALLL related to loans collectively evaluated for impairment		1,781		1,781		2,143
Ending ALLL related to loans individually evaluated for impairment		928		928		690
Ending ALLL related to purchased credit-impaired loans		2,716		2,716		2,837
Collectively evaluated for impairment		185,478		185,478		206,603
Individually evaluated for impairment		4,305		4,305		3,296
Total loans		$ 189,967		$ 189,967		$ 210,223
Ratio of allowance for loan losses to total loans		1.43%		1.43%		1.35%
Allowance for loan losses to non-accrual loans		767.00%		767.00%
Commercial loans | Commercial and industrial | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 7		$ 7		$ 4
Purchase credit-impaired		184		184		324
Commercial real estate loans | Commercial real estate, owner-occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		2,052	1,979	1,924	2,012
Provision for loan losses		17	9	145	(24)
Charge-offs		0	0	0	0
Recoveries		0	5	0	5
Ending balance	2,052	2,069	1,993	2,069	1,993
Ending ALLL related to loans collectively evaluated for impairment		2,013		2,013		1,859
Ending ALLL related to loans individually evaluated for impairment		56		56		65
Ending ALLL related to purchased credit-impaired loans		2,069		2,069		1,924
Collectively evaluated for impairment		230,653		230,653		220,933
Individually evaluated for impairment		6,993		6,993		7,056
Total loans		$ 239,335		$ 239,335		$ 230,605
Ratio of allowance for loan losses to total loans		0.86%		0.86%		0.83%
Allowance for loan losses to non-accrual loans						137.00%
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		1,689		1,689		2,616
Commercial real estate loans | Commercial real estate, investor
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		5,944	6,713	6,672	6,196
Provision for loan losses		128	(26)	(606)	455
Charge-offs		0	0	0	0
Recoveries		12	5	18	41
Ending balance	5,944	6,084	6,692	6,084	6,692
Ending ALLL related to loans collectively evaluated for impairment		6,084		6,084		6,672
Ending ALLL related to loans individually evaluated for impairment		0		0		0
Ending ALLL related to purchased credit-impaired loans		6,084		6,084		6,672
Collectively evaluated for impairment		667,192		667,192		668,371
Individually evaluated for impairment		2,754		2,754		2,954
Total loans		$ 671,677		$ 671,677		$ 673,499
Ratio of allowance for loan losses to total loans		0.91%		0.91%		0.99%
Allowance for loan losses to non-accrual loans		301.00%		301.00%		275.00%
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		1,731		1,731		2,174
Commercial real estate loans | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		535	571	839	633
Provision for loan losses		158	(33)	693	109
Charge-offs	(839)	0	0	(839)	(204)
Recoveries		0	96	0	96
Ending balance	535	693	634	693	634
Ending ALLL related to loans collectively evaluated for impairment		691		691		836
Ending ALLL related to loans individually evaluated for impairment		0		0		0
Ending ALLL related to purchased credit-impaired loans		693		693		839
Collectively evaluated for impairment		51,681		51,681		42,718
Individually evaluated for impairment		3,238		3,238		5,684
Total loans		$ 54,921		$ 54,921		$ 48,413
Ratio of allowance for loan losses to total loans		1.26%		1.26%		1.73%
Allowance for loan losses to non-accrual loans		347.00%		347.00%		16.00%
Commercial real estate loans | Construction | Purchase credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Ending ALLL related to purchased credit-impaired loans		$ 2		$ 2		$ 3
Purchase credit-impaired		2		2		11
Residential loans | Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		843	944	859	875
Provision for loan losses		9	(18)	(9)	49
Charge-offs		0	0	0	0
Recoveries		1	1	3	3
Ending balance	843	853	927	853	927
Ending ALLL related to loans collectively evaluated for impairment		850		850		859
Ending ALLL related to loans individually evaluated for impairment		3		3		0
Ending ALLL related to purchased credit-impaired loans		853		853		859
Collectively evaluated for impairment		113,101		113,101		110,028
Individually evaluated for impairment		562		562		693
Total loans		$ 113,731		$ 113,731		$ 110,788
Ratio of allowance for loan losses to total loans		0.75%		0.75%		0.78%
Allowance for loan losses to non-accrual loans		496.00%		496.00%		307.00%
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		68		68		67
Residential loans | Other residential
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		435	454	433	317
Provision for loan losses		(50)	(8)	(48)	129
Charge-offs		0	0	0	0
Recoveries		0	0	0	0
Ending balance	435	385	446	385	446
Ending ALLL related to loans collectively evaluated for impairment		314		314		341
Ending ALLL related to loans individually evaluated for impairment		71		71		92
Ending ALLL related to purchased credit-impaired loans		385		385		433
Collectively evaluated for impairment		69,662		69,662		70,990
Individually evaluated for impairment		2,020		2,020		2,045
Total loans		$ 71,682		$ 71,682		$ 73,035
Ratio of allowance for loan losses to total loans		0.54%		0.54%		0.59%
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		444	481	566	629
Provision for loan losses		32	90	(81)	(136)
Charge-offs		(1)	(2)	(12)	(6)
Recoveries		1	0	3	82
Ending balance	444	476	569	476	569
Ending ALLL related to loans collectively evaluated for impairment		355		355		282
Ending ALLL related to loans individually evaluated for impairment		121		121		284
Ending ALLL related to purchased credit-impaired loans		476		476		566
Collectively evaluated for impairment		20,430		20,430		14,995
Individually evaluated for impairment		1,457		1,457		1,793
Total loans		$ 21,887		$ 21,887		$ 16,788
Ratio of allowance for loan losses to total loans		2.17%		2.17%		3.37%
Allowance for loan losses to non-accrual loans		481.00%		481.00%		544.00%
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		1,561	633	969	506
Provision for loan losses		(380)	249	212	376
Charge-offs		0	0	0	0
Recoveries		0	0	0	0
Ending balance	$ 1,561	1,181	$ 882	1,181	$ 882
Ending ALLL related to loans collectively evaluated for impairment		1,181		1,181		969
Ending ALLL related to loans individually evaluated for impairment		0		0		0
Ending ALLL related to purchased credit-impaired loans		1,181		1,181		969
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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	$ 4,965		$ 4,965		$ 7,678
Carrying value	3,674		3,674		5,192
Accretable Yield [Roll Forward]
Balance at beginning of period	3,711	$ 4,514	4,027	$ 3,649
Removals	(837)	0	(914)	(273)
Accretion	(128)	(126)	(367)	(494)
Reclassifications from nonaccretable difference	0	(242)	0	1,264
Balance at end of period	2,746	$ 4,146	2,746	$ 4,146
Commercial loans | Commercial and industrial
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	258		258		479
Carrying value	184		184		324
Commercial real estate loans
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	4,355		4,355		6,831
Carrying value	3,420		3,420		4,790
Commercial real estate loans | Construction
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	125		125		136
Carrying value	2		2		11
Residential loans | Home equity
PCI Loans, Carrying Value [Abstract]
Unpaid principal balance	227		227		232
Carrying value	$ 68		$ 68		$ 67

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses - Pledged Loans (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Residential loans pledged for FRB borrowings	$ 831.6	$ 868.1
Other residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged residential loan portfolio to secure borrowing with FRB	$ 41.9	$ 34

Borrowings - Lines of Credit (D

Borrowings - Lines of Credit (Details) - USD ($)	Feb. 05, 2008	Sep. 30, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Periodic term lender may accelerate due date		3 months
Federal Funds Purchased | Line of credit
Line of Credit Facility [Line Items]
Amount of borrowings outstanding		$ 0	$ 0
Federal Home Loan Bank Borrowings | Line of credit
Line of Credit Facility [Line Items]
Lines of credit		$ 467,600,000	450,600,000
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%
Periodic term interest-only payments are due		3 months
Remaining available line of credit from FHLB		$ 452,300,000
Federal Home Loan Bank Borrowings | Letters of credit
Line of Credit Facility [Line Items]
Amount of borrowings outstanding		241,000
Federal Home Loan Bank Overnight Borrowings | Line of credit
Line of Credit Facility [Line Items]
Amount of borrowings outstanding		0	0
Federal Reserve Line of Credit | Line of credit
Line of Credit Facility [Line Items]
Lines of credit		35,300,000	27,700,000
Amount of borrowings outstanding		0	0
Unsecured Debt | Federal Funds Purchased | Line of credit
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, 2015USD ($)debenture	Sep. 30, 2014USD ($)
Debt Instrument [Line Items]
Number of subordinated debentures acquired | debenture	2
Accretion of discount on subordinated debentures	$ 158	$ 162
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	$ 158	$ 162
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	3.34%
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	1.74%
Basis spread on subordinated debentures	1.40%

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015$ / sharesshares	Nov. 30, 2011investor	Sep. 30, 2015USD ($)$ / sharesshares	Sep. 30, 2014USD ($)$ / shares	Sep. 30, 2015USD ($)$ / sharesshares	Sep. 30, 2014USD ($)$ / shares	Dec. 31, 2014USD ($)
Class of Stock [Line Items]
Number of institutional investors that purchased warrant | investor		2
Cash dividends to common stockholders | $			$ 1,316	$ 1,185	$ 3,936	$ 3,428	$ 4,733
Cash dividends paid per common share | $ / shares			$ 0.22	$ 0.20	$ 0.66	$ 0.58
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%
Common stock
Class of Stock [Line Items]
Number of common stock shares authorized to be purchased by warrant	157,711		157,711		157,711
Exercise price of warrant to purchase common stock (usd per share) | $ / shares	$ 26.63		$ 26.63		$ 26.63
Net issuance of shares of common stock from cashless exercise	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	154,242		154,242		154,242
Exercise price of warrant to purchase common stock (usd per share) | $ / shares	$ 27.23		$ 27.23		$ 27.23

Commitments and Contingencies45

Commitments and Contingencies (Details) $ in Thousands	Jan. 14, 2015request	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Operating Leases
2,015		$ 941
2,016		3,763
2,017		3,755
2,018		3,784
2,019		3,526
Thereafter		6,678
Total		22,447
Minimum payments due on minimum sublease rentals under non-cancelable subleases		271
Visa Inc.
Litigation Matters
Balance of escrow account for legal settlements		1,100,000
Number of requests by merchants rejoining class settlement | request	1,179
Loan commitments and standby letters of credit, unused
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		375,500
Loan commitments and standby letters of credit, unused | Interest payable and other liabilities
Loss Contingencies [Line Items]
Allowance for off balance sheet commitments		1,000	$ 1,000
Commercial lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		195,600
Revolving home equity lines
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		125,100
Undisbursed construction loans
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		38,900
Standby letters of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		4,300
Personal and other lines of credit
Loss Contingencies [Line Items]
Loan commitments and standby letters of credit, off-balance sheet		$ 11,600

Derivative Financial Instrume46

Derivative Financial Instruments and Hedging Activities - Narrative (Details) - Fair value hedge $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)derivative	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)derivative	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Derivatives, Fair Value [Line Items]
Net hedge ineffectiveness, derivatives	$ 79	$ (48)	$ 21	$ 125
Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Accrued interest on swaps	$ 34		$ 34		$ 41
Interest rate swap | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Number of derivative instruments | derivative	8		8
Interest rate swap | Designated as hedging instrument | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Asset derivatives	$ 0		$ 0		4,589
Interest rate swap | Designated as hedging instrument | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, Liability derivatives	29,999		29,999		26,899
Interest income
Derivatives, Fair Value [Line Items]
(Decrease) increase in value of designated interest rate swaps recognized in interest income	(813)	21	(393)	334
Payment on interest rate swaps recorded in interest income	(231)	(251)	(700)	(755)
Increase (decrease) in value of hedged loans recognized in interest income	905	(54)	453	(133)
Decrease in value of yield maintenance agreement recognized against interest income	(13)	(15)	(39)	(77)
Net loss on derivatives recognized against interest income	(152)	$ (299)	(679)	$ (631)
Assets and liabilities at fair value measured on a recurring basis | Interest rate contract | Designated as hedging instrument | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Asset derivatives	0		0		61
Assets and liabilities at fair value measured on a recurring basis | Interest rate contract | Designated as hedging instrument | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts fair value, Liability derivatives	$ 2,328		$ 2,328		$ 1,996

Derivative Financial Instrume47

Derivative Financial Instruments and Hedging Activities - Offsetting of Assets (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 0	$ 61,000
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	0	61,000
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(61,000)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	0	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	0	61,000
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	0	61,000
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(61,000)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	0	0
Counterparty B
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	0	0
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	0	0
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	$ 0	$ 0

Derivative Financial Instrume48

Derivative Financial Instruments and Hedging Activities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 2,328	$ 1,996
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	2,328	1,996
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(61)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(2,328)	(1,740)
Net Amount	0	195
Interest rate swap | Other liabilities
Offsetting Liabilities [Line Items]
Accrued interest on derivative liability interest swaps	34	40
Counterparty A
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	2,001	1,616
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	2,001	1,616
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(61)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(2,001)	(1,360)
Net Amount	0	195
Counterparty B
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	327	380
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	327	380
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(327)	(380)
Net Amount	$ 0	$ 0