TriCo Bancshares (TCBK) 10-Q 10 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 29, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	TCBK
Entity Registrant Name	TRICO BANCSHARES /
Entity Central Index Key	356,171
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,785,173

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets:
Cash and due from banks	$ 76,702	$ 94,305
Cash at Federal Reserve and other banks	312,176	209,156
Cash and cash equivalents	388,878	303,461
Investment securities:
Available for sale	477,454	404,885
Held to maturity	705,133	726,530
Restricted equity securities	16,956	16,956
Loans held for sale	2,240	1,873
Loans	2,541,547	2,522,937
Allowance for loan losses	(36,388)	(36,011)
Total loans, net	2,505,159	2,486,926
Foreclosed assets, net	4,471	5,369
Premises and equipment, net	51,522	43,811
Cash value of life insurance	95,256	94,560
Accrued interest receivable	11,075	10,786
Goodwill	64,311	63,462
Other intangible assets, net	7,641	5,894
Mortgage servicing rights	7,140	7,618
Other assets	57,720	48,591
Total assets	4,394,956	4,220,722
Deposits:
Noninterest-bearing demand	1,178,001	1,155,695
Interest-bearing	2,607,039	2,475,571
Total deposits	3,785,040	3,631,266
Accrued interest payable	751	774
Reserve for unfunded commitments	2,475	2,475
Other liabilities	68,064	65,293
Other borrowings	18,671	12,328
Junior subordinated debt	56,519	56,470
Total liabilities	$ 3,931,520	$ 3,768,606
Commitments and contingencies (Note 18)
Shareholders' equity:
Common stock, no par value: 50,000,000 shares authorized; issued and outstanding: 22,785,173 at March 31, 2016 22,775,173 at December 31, 2015	$ 248,101	$ 247,587
Retained earnings	213,563	206,307
Accumulated other comprehensive income, net of tax	1,772	(1,778)
Total shareholders' equity	463,436	452,116
Total liabilities and shareholders' equity	$ 4,394,956	$ 4,220,722

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015	Aug. 21, 2007
Statement of Financial Position [Abstract]
Common stock, no par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,785,173	22,775,173
Common stock, shares outstanding	22,785,173	22,775,173	15,814,662

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest and dividend income:
Loans, including fees	$ 34,738	$ 31,165
Debt securities:
Taxable	6,545	5,799
Tax exempt	897	161
Dividends	375	336
Interest bearing cash at Federal Reserve and other banks	239	264
Total interest and dividend income	42,794	37,725
Interest expense:
Deposits	855	899
Other borrowings	2	1
Junior subordinated debt	535	482
Total interest expense	1,392	1,382
Net interest income	41,402	36,343
Provision for (benefit from reversal of) loan losses	209	197
Net interest income after provision for loan losses	41,193	36,146
Noninterest income:
Service charges and fees	7,305	7,344
Gain on sale of loans	803	622
Commissions on sale of non-deposit investment products	532	965
Increase in cash value of life insurance	696	675
Other	454	574
Total noninterest income	9,790	10,180
Noninterest expense:
Salaries and related benefits	19,265	18,100
Other	14,486	14,182
Total noninterest expense	33,751	32,282
Income before income taxes	17,232	14,044
Provision for income taxes	6,558	5,708
Net income	$ 10,674	$ 8,336
Earnings per share:
Basic	$ 0.47	$ 0.37
Diluted	$ 0.46	$ 0.36

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 10,674	$ 11,422	$ 12,694	$ 11,366	$ 8,336
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available for sale securities arising during the period	3,550				9
Change in minimum pension liability					111
Other comprehensive income (loss)	3,550				120
Comprehensive income	$ 14,224				$ 8,456

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning balance at Dec. 31, 2014	$ 418,172	$ 244,318	$ 176,057	$ (2,203)
Beginning balance, shares at Dec. 31, 2014		22,714,964
Net income	8,336		8,336
Other comprehensive income	120			120
Stock option vesting	220	$ 220
RSU vesting	76	76
PSU vesting	28	28
Stock options exercised	887	$ 887
Stock options exercised, shares		47,000
Tax benefit of stock options exercised	18	$ 18
Repurchase of common stock	(509)	$ (231)	(278)
Repurchase of common stock, shares		(21,461)
Dividends paid	(2,515)		(2,515)
Ending balance at Mar. 31, 2015	424,833	$ 245,316	181,600	(2,083)
Ending balance, shares at Mar. 31, 2015		22,740,503
Beginning balance at Dec. 31, 2015	$ 452,116	$ 247,587	206,307	(1,778)
Beginning balance, shares at Dec. 31, 2015	22,775,173	22,775,173
Net income	$ 10,674		10,674
Other comprehensive income	3,550			3,550
Stock option vesting	155	$ 155
RSU vesting	120	120
PSU vesting	56	56
Stock options exercised	$ 173	$ 173
Stock options exercised, shares	10,000	10,000
Tax benefit of stock options exercised	$ 10	$ 10
Dividends paid	(3,418)		(3,418)
Ending balance at Mar. 31, 2016	$ 463,436	$ 248,101	$ 213,563	$ 1,772
Ending balance, shares at Mar. 31, 2016	22,785,173	22,785,173

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Dividends paid, per share	$ 0.15	$ 0.11
Retained Earnings [Member]
Dividends paid, per share	$ 0.15	$ 0.11

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income	$ 10,674	$ 8,336
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	1,526	1,494
Amortization of intangible assets	299	289
Provision for loan losses	209	197
Amortization of investment securities premium, net	1,131	719
Originations of loans for resale	(26,130)	(24,527)
Proceeds from sale of loans originated for resale	26,243	23,130
Gain on sale of loans	(803)	(622)
Change in market value of mortgage servicing rights	698	506
(Reversal of) provision for losses on foreclosed assets	(11)	67
Gain on sale of foreclosed assets	(92)	(311)
Loss on disposal of fixed assets	31	84
Increase in cash value of life insurance	(696)	(675)
Equity compensation vesting expense	331	324
Stock option excess tax benefits	(10)	(18)
Change in:
Reserve for unfunded commitments		(130)
Interest receivable	(289)	(519)
Interest payable	(23)	(126)
Other assets and liabilities, net	(8,988)	4,743
Net cash from operating activities	4,100	12,961
Investing activities:
Proceeds from maturities of securities available for sale	10,052	5,280
Proceeds from maturities of securities held to maturity	20,815	19,474
Purchases of securities available for sale	(77,045)	(147,335)
Purchases of securities held to maturity		(146,100)
Loan origination and principal collections, net	(45,515)	(40,331)
Proceeds from sale of loans other than loans originated for sale	27,049
Improvement of foreclosed assets		(316)
Proceeds from sale of other real estate owned	1,417	806
Proceeds from sale of premises and equipment	1	1
Purchases of premises and equipment	(7,424)	(706)
Cash received from acquisition, net	156,316
Net cash used by investing activities	85,666	(309,227)
Financing activities:
Net decrease in deposits	(7,457)	(30,935)
Net change in other borrowings	6,343	(180)
Stock option excess tax benefits	10	18
Repurchase of common stock		(27)
Dividends paid	(3,418)	(2,515)
Exercise of stock options	173	405
Net cash used by financing activities	(4,349)	(33,234)
Net change in cash and cash equivalents	85,417	(329,500)
Cash and cash equivalents and beginning of year	303,461	610,728
Cash and cash equivalents at end of year	388,878	281,228
Supplemental disclosure of noncash activities:
Unrealized gain on securities available for sale	6,125	15
Loans transferred to foreclosed assets	416	1,244
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes		509
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	1,415	1,508
Cash paid for income taxes	0	$ 0
Assets acquired in acquisition	161,231
Liabilities assumed in acquisition	$ 161,231

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 – Summary of Significant Accounting Policies Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 26 California counties. Tri Counties Bank currently operates from 58 traditional branches and 12 in-store branches. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by TriCo and three acquired with the acquisition of North Valley Bancorp. See Note 17 – Junior Subordinated Debt. The unaudited condensed financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. In the opinion of the Company’s Management (“Management”), all adjustments, consisting solely of normal recurring adjustments, considered necessary for a fair presentation of results for the interim periods presented have been included. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,697,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet. These interim condensed consolidated financial statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2015 Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 10, 2016. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. As described in Note 2, the Company acquired three branch offices, and deposits totaling $161,231,000. The acquired assets and assumed liabilities were measured at estimated fair value values under the acquisition method of accounting. The Company made significant estimates and exercised significant judgment in accounting for the acquisition. Land and building were valued based on appraised values. An identifiable intangible was also recorded representing the fair value of the core deposit customer base based on an evaluation of the cost of such deposits relative to alternative funding sources. Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout the northern San Joaquin Valley, the Sacramento Valley and northern mountain regions of California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking. Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash on hand, amounts due from banks, and federal funds sold. Net cash flows are reported for loan and deposit transactions and other borrowings. Investment Securities The Company classifies its debt and marketable equity securities into one of three categories: trading, available for sale or held to maturity. Trading securities are bought and held principally for the purpose of selling in the near term. Held to maturity securities are those securities which the Company has the ability and intent to hold until maturity. These securities are carried at cost adjusted for amortization of premium and accretion of discount, computed by the effective interest method over their contractual lives. All other securities not included in trading or held to maturity are classified as available for sale. Available for sale securities are recorded at fair value. Unrealized gains and losses, net of the related tax effect, on available for sale securities are reported as a separate component of other accumulated comprehensive income in shareholders’ equity until realized. Premiums and discounts are amortized or accreted over the life of the related investment security as an adjustment to yield using the effective interest method. Dividend and interest income are recognized when earned. Realized gains and losses are derived from the amortized cost of the security sold. During the three months ended March 31, 2016 and throughout 2015, the Company did not have any securities classified as trading. The Company assesses other-than-temporary impairment (“OTTI”) based on whether it intends to sell a security or if it is likely that the Company would be required to sell the security before recovery of the amortized cost basis of the investment, which may be maturity. For debt securities, if we intend to sell the security or it is more likely than not that we will be required to sell the security before recovering its cost basis, the entire impairment loss would be recognized in earnings as an OTTI. If we do not intend to sell the security and it is not likely that we will be required to sell the security but we do not expect to recover the entire amortized cost basis of the security, only the portion of the impairment loss representing credit losses would be recognized in earnings. The credit loss on a security is measured as the difference between the amortized cost basis and the present value of the cash flows expected to be collected. Projected cash flows are discounted by the original or current effective interest rate depending on the nature of the security being measured for potential OTTI. The remaining impairment related to all other factors, the difference between the present value of the cash flows expected to be collected and fair value, is recognized as a charge to other comprehensive income (“OCI”). Impairment losses related to all other factors are presented as separate categories within OCI. The accretion of the amount recorded in OCI increases the carrying value of the investment and does not affect earnings. If there is an indication of additional credit losses the security is re-evaluated according to the procedures described above. No OTTI losses were recognized during the three months ended March 31, 2016 and throughout 2015. Restricted Equity Securities Restricted equity securities represent the Company’s investment in the stock of the Federal Home Loan Bank of San Francisco (“FHLB”) and are carried at par value, which reasonably approximates its fair value. While technically these are considered equity securities, there is no market for the FHLB stock. Therefore, the shares are considered as restricted investment securities. Management periodically evaluates FHLB stock for other-than-temporary impairment. Management’s determination of whether these investments are impaired is based on its assessment of the ultimate recoverability of cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of any decline in net assets of the FHLB as compared to the capital stock amount for the FHLB and the length of time this situation has persisted, (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB, (3) the impact of legislative and regulatory changes on institutions and, accordingly, the customer base of the FHLB, and (4) the liquidity position of the FHLB. As a member of the FHLB system, the Bank is required to maintain a minimum level of investment in FHLB stock based on specific percentages of its outstanding mortgages, total assets, or FHLB advances. The Bank may request redemption at par value of any stock in excess of the minimum required investment. Stock redemptions are at the discretion of the FHLB. Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors of current investor yield requirements. Net unrealized losses are recognized through a valuation allowance by charges to noninterest income. Mortgage loans held for sale are generally sold with the mortgage servicing rights retained by the Company. Gains or losses on the sale of loans that are held for sale are recognized at the time of the sale and determined by the difference between net sale proceeds and the net book value of the loans less the estimated fair value of any retained mortgage servicing rights. Loans and Allowance for Loan Losses Loans originated by the Company, i.e., not purchased or acquired in a business combination, are referred to as originated loans. Originated loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal amount outstanding, net of deferred loan fees and costs. Loan origination and commitment fees and certain direct loan origination costs are deferred, and the net amount is amortized as an adjustment of the related loan’s yield over the actual life of the loan. Originated loans on which the accrual of interest has been discontinued are designated as nonaccrual loans. Originated loans are placed in nonaccrual status when reasonable doubt exists as to the full, timely collection of interest or principal, or a loan becomes contractually past due by 90 days or more with respect to interest or principal and is not well secured and in the process of collection. When an originated loan is placed on nonaccrual status, all interest previously accrued but not collected is reversed. Income on such loans is then recognized only to the extent that cash is received and where the future collection of principal is probable. Interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of Management, the loan is estimated to be fully collectible as to both principal and interest. An allowance for loan losses for originated loans is established through a provision for loan losses charged to expense. The allowance is maintained at a level which, in Management’s judgment, is adequate to absorb probable incurred credit losses inherent in the loan portfolio as of the balance sheet date. Originated loans and deposit related overdrafts are charged against the allowance for loan losses when Management believes that the collectability of the principal is unlikely or, with respect to consumer installment loans, according to an established delinquency schedule. The allowance is an amount that Management believes will be adequate to absorb probable incurred losses inherent in existing loans, based on evaluations of the collectability, impairment and prior loss experience of loans. The evaluations take into consideration such factors as changes in the nature and size of the portfolio, overall portfolio quality, loan concentrations, specific problem loans, and current economic conditions that may affect the borrower’s ability to pay. The Company defines an originated loan as impaired when it is probable the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired originated loans are measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate. As a practical expedient, impairment may be measured based on the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent. When the measure of the impaired loan is less than the recorded investment in the loan, the impairment is recorded through a valuation allowance. In situations related to originated loans where, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession for other than an insignificant period of time to the borrower that the Company would not otherwise consider, the related loan is classified as a troubled debt restructuring (TDR). The Company strives to identify borrowers in financial difficulty early and work with them to modify to more affordable terms before their loan reaches nonaccrual status. These modified terms may include rate reductions, principal forgiveness, payment forbearance and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of the collateral. In cases where the Company grants the borrower new terms that result in the loan being classified as a TDR, the Company measures any impairment on the restructuring as noted above for impaired loans. TDR loans are classified as impaired until they are fully paid off or charged off. Loans that are in nonaccrual status at the time they become TDR loans, remain in nonaccrual status until the borrower demonstrates a sustained period of performance which the Company generally believes to be six consecutive months of payments, or equivalent. Otherwise, TDR loans are subject to the same nonaccrual and charge-off policies as noted above with respect to their restructured principal balance. Credit risk is inherent in the business of lending. As a result, the Company maintains an allowance for loan losses to absorb probable incurred losses inherent in the Company’s originated loan portfolio. This is maintained through periodic charges to earnings. These charges are included in the Consolidated Statements of Income as provision for loan losses. All specifically identifiable and quantifiable losses are immediately charged off against the allowance. However, for a variety of reasons, not all losses are immediately known to the Company and, of those that are known, the full extent of the loss may not be quantifiable at that point in time. The balance of the Company’s allowance for originated loan losses is meant to be an estimate of these probable incurred losses inherent in the portfolio. The Company formally assesses the adequacy of the allowance for originated loan losses on a quarterly basis. Determination of the adequacy is based on ongoing assessments of the probable risk in the outstanding originated loan portfolio, and to a lesser extent the Company’s originated loan commitments. These assessments include the periodic re-grading of credits based on changes in their individual credit characteristics including delinquency, seasoning, recent financial performance of the borrower, economic factors, changes in the interest rate environment, growth of the portfolio as a whole or by segment, and other factors as warranted. Loans are initially graded when originated. They are re-graded as they are renewed, when there is a new loan to the same borrower, when identified facts demonstrate heightened risk of nonpayment, or if they become delinquent. Re-grading of larger problem loans occurs at least quarterly. Confirmation of the quality of the grading process is obtained by independent credit reviews conducted by consultants specifically hired for this purpose and by various bank regulatory agencies. The Company’s method for assessing the appropriateness of the allowance for originated loan losses includes specific allowances for impaired originated loans, formula allowance factors for pools of credits, and allowances for changing environmental factors (e.g., interest rates, growth, economic conditions, etc.). Allowance factors for loan pools were based on historical loss experience by product type and prior risk rating. During the three months ended September 30, 2015, the Company modified its methodology used to determine the allowance for home equity lines of credit that are about to exit their revolving period, or have recently entered into their amortization period and are now classified as home equity loans. This change in methodology increased the required allowance for such lines and loans by $859,000, and $459,000, respectively, and represents the increase in estimated incurred losses in these lines and loans as of September 30, 2015 due to higher required contractual principal and interest payments of such lines and loans. Loans purchased or acquired in a business combination are referred to as acquired loans. Acquired loans are valued as of the acquisition date in accordance with Financial Accounting Standards Board Accounting Standards Codification (“FASB ASC”) Topic 805, Business Combinations Loans and Debt Securities Acquired with Deteriorated Credit Quality Acquired loans that are not PCI loans are referred to as purchased not credit impaired (PNCI) loans. PNCI loans are accounted for under FASB ASC Topic 310-20, Receivables – Nonrefundable Fees and Other Costs, Throughout these financial statements, and in particular in Note 4 and Note 5, when we refer to “Loans” or “Allowance for loan losses” we mean all categories of loans, including Originated, PNCI, PCI – cash basis, and PCI - other. When we are not referring to all categories of loans, we will indicate which we are referring to – Originated, PNCI, PCI – cash basis, or PCI - other. When referring to PNCI and PCI loans we use the terms “nonaccretable difference”, “accretable yield”, or “purchase discount”. Nonaccretable difference is the difference between undiscounted contractual cash flows due and undiscounted cash flows we expect to collect, or put another way, it is the undiscounted contractual cash flows we do not expect to collect. Accretable yield is the difference between undiscounted cash flows we expect to collect and the value at which we have recorded the loan on our financial statements. On the date of acquisition, all purchased loans are recorded on our consolidated financial statements at estimated fair value. Purchase discount is the difference between the estimated fair value of loans on the date of acquisition and the principal amount owed by the borrower, net of charge offs, on the date of acquisition. We may also refer to “discounts to principal balance of loans owed, net of charge-offs”. Discounts to principal balance of loans owed, net of charge-offs is the difference between principal balance of loans owed, net of charge-offs, and loans as recorded on our financial statements. Discounts to principal balance of loans owed, net of charge-offs arise from purchase discounts, and equal the purchase discount on the acquisition date. Loans are also categorized as “covered” or “noncovered”. Covered loans refer to loans covered by a Federal Deposit Insurance Corporation (“FDIC”) loss sharing agreement. Noncovered loans refer to loans not covered by a FDIC loss sharing agreement. Foreclosed Assets Foreclosed assets include assets acquired through, or in lieu of, loan foreclosure. Foreclosed assets are held for sale and are initially recorded at fair value less estimated costs to sell at the date of foreclosure, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Any write-downs based on the asset’s fair value less costs to sell at the date of acquisition are charged to the allowance for loan and lease losses. Any recoveries based on the asset’s fair value less estimated costs to sell in excess of the recorded value of the loan at the date of acquisition are recorded to the allowance for loan and lease losses. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. If fair value declines subsequent to foreclosure, a valuation allowance is recorded through expense. Operating costs after acquisition are expensed. Revenue and expenses from operations and changes in the valuation allowance are included in other noninterest expense. Gain or loss on sale of foreclosed assets is included in noninterest income. Foreclosed assets that are not subject to a FDIC loss-share agreement are referred to as noncovered foreclosed assets. Foreclosed assets acquired through FDIC-assisted acquisitions that are subject to a FDIC loss-share agreement, and all assets acquired via foreclosure of covered loans are referred to as covered foreclosed assets. Covered foreclosed assets are reported exclusive of expected reimbursement cash flows from the FDIC. Foreclosed covered loan collateral is transferred into covered foreclosed assets at the loan’s carrying value, inclusive of the acquisition date fair value discount. Covered foreclosed assets are initially recorded at estimated fair value less estimated costs to sell on the acquisition date based on similar market comparable valuations less estimated selling costs. Any subsequent valuation adjustments due to declines in fair value will be charged to noninterest expense, and will be mostly offset by noninterest income representing the corresponding increase to the FDIC indemnification asset for the offsetting loss reimbursement amount. Any recoveries of previous valuation adjustments will be credited to noninterest expense with a corresponding charge to noninterest income for the portion of the recovery that is due to the FDIC. Premises and Equipment Land is carried at cost. Land improvements, buildings and equipment, including those acquired under capital lease, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization expenses are computed using the straight-line method over the estimated useful lives of the related assets or lease terms. Asset lives range from 3-10 years for furniture and equipment and 15-40 years for land improvements and buildings. Goodwill and Other Intangible Assets Goodwill represents the excess of costs over fair value of net assets of businesses acquired. Goodwill and other intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually. Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment. The Company has an identifiable intangible asset consisting of core deposit intangibles (CDI). CDI are amortized over their respective estimated useful lives, and reviewed for impairment. Impairment of Long-Lived Assets and Goodwill Long-lived assets, such as premises and equipment, and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the consolidated balance sheet. As of December 31 of each year, goodwill is tested for impairment, and is tested for impairment more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount exceeds the asset’s fair value. This determination is made at the reporting unit level. The Company may choose to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then goodwill is deemed not to be impaired. However, if the Company concludes otherwise, or if the Company elected not to first assess qualitative factors, then the Company performs the first step of a two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. Second, if the carrying amount of the reporting unit exceeds its fair value, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. Currently, and historically, the Company is comprised of only one reporting unit that operates within the business segment it has identified as “community banking”. Goodwill was not impaired as of December 31, 2015 because the fair value of the reporting unit exceeded its carrying value. Mortgage Servicing Rights Mortgage servicing rights (MSR) represent the Company’s right to a future stream of cash flows based upon the contractual servicing fee associated with servicing mortgage loans. Our MSR arise from residential and commercial mortgage loans that we originate and sell, but retain the right to service the loans. The net gain from the retention of the servicing right is included in gain on sale of loans in noninterest income when the loan is sold. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds and default rates and losses. Servicing fees are recorded in noninterest income when earned. The Company accounts for MSR at fair value. The determination of fair value of our MSR requires management judgment because they are not actively traded. The determination of fair value for MSR requires valuation processes which combine the use of discounted cash flow models and extensive analysis of current market data to arrive at an estimate of fair value. The cash flow and prepayment assumptions used in our discounted cash flow model are based on empirical data drawn from the historical performance of our MSR, which we believe are consistent with assumptions used by market participants valuing similar MSR, and from data obtained on the performance of similar MSR. The key assumptions used in the valuation of MSR include mortgage prepayment speeds and the discount rate. These variables can, and generally will, change from quarter to quarter as market conditions and projected interest rates change. The key risks inherent with MSR are prepayment speed and changes in interest rates. The Company uses an independent third party to determine fair value of MSR. Indemnification Asset/Liability The Company accounts for amounts receivable or payable under its loss-share agreements entered into with the FDIC in connection with its purchase and assumption of certain assets and liabilities of Granite as indemnification assets in accordance with FASB ASC Topic 805, Business Combinations Reserve for Unfunded Commitments The reserve for unfunded commitments is established through a provision for losses – unfunded commitments charged to noninterest expense. The reserve for unfunded commitments is an amount that Management believes will be adequate to absorb probable losses inherent in existing commitments, including unused portions of revolving lines of credits and other loans, standby letters of credits, and unused deposit account overdraft privilege. The reserve for unfunded commitments is based on evaluations of the collectability, and prior loss experience of unfunded commitments. The evaluations take into consideration such factors as changes in the nature and size of the loan portfolio, overall loan portfolio quality, loan concentrations, specific problem loans and related unfunded commitments, and current economic conditions that may affect the borrower’s or depositor’s ability to pay. Income Taxes The Company’s accounting for income taxes is based on an asset and liability approach. The Company recognizes the amount of taxes payable or refundable for the current year, and deferred tax assets and liabilities for the future tax consequences that have been recognized in its financial statements or tax returns. The measurement of tax assets and liabilities is based on the provisions of enacted tax laws. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized. Interest and/or penalties related to income taxes are reported as a component of noninterest income. Off-Balance Sheet Credit Related Financial Instruments In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under credit card arrangements, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded when they are funded. Geographical Descriptions For the purpose of describing the geographical location of the Company’s loans, the Company has defined northern California as that area of California north of, and including, Stockton; central California as that area of the state south of Stockton, to and including, Bakersfield; and southern California as that area of the state south of Bakersfield. Reclassifications Certain amounts reported in previous consolidated financial statements have been reclassified to conform to the presentation in this report. These reclassifications did not affect previously reported net income or total shareholders’ equity. Recent Accounting Pronouncements FASB issued ASU No. 2016-9 , Compensation – Stock Compensation (Topic 718).

Business Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Business Combinations	Note 2 - Business Combinations On March 18, 2016, Tri Counties Bank completed its acquisition of three branch banking offices from Bank of America originally announced October 28, 2015. The acquired branches are located in Arcata, Eureka and Fortuna in Humboldt County on the North Coast of California, and have significant overlap when compared to the Company’s Northern California customer base and branch locations. This made these branch acquisitions a very good fit in terms of potential cost savings and future growth potential. With the levels of capital at the time, the acquisitions fit well into the Company’s growth strategy. Also on March 18, 2016, the electronic customer service and other data processing systems of the acquired branches were converted into Tri Counties Bank’s systems, and the effect of revenue and expenses from the operations of the acquired branches are included in the results of the Company. The Bank paid $3,204,000 for deposit relationships with balances of $161,231,000 and loans with balances of $289,000, and received cash of $159,520,000 from Bank of America. The assets acquired and liabilities assumed in the acquisition of these branches were accounted for in accordance with ASC 805 “Business Combinations,” using the acquisition method of accounting and were recorded at their estimated fair values on the March 18, 2016 acquisition date, and its results of operations are included in the Company’s consolidated statements of income since that date. The excess of the fair value of consideration transferred over total identifiable net assets was recorded as goodwill. The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Company and the acquired branches. $849,000 of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a purchase of assets and assumption of liabilities for tax purposes. The following table discloses the calculation of the fair value of consideration transferred, the total identifiable net assets acquired and the resulting goodwill relating to the acquisition of three branch banking offices and certain deposits from Bank of America on March 18, 2016: (in thousands) March 18, 2016 Fair value of consideration transferred: Cash consideration $ 3,204 Total fair value of consideration transferred 3,204 Asset acquired: Cash and cash equivalents 159,520 Loans 289 Premises and equipment 1,590 Core deposit intangible 2,046 Other assets 141 Total assets acquired 163,586 Liabilities assumed: Deposits 161,231 Total liabilities assumed 161,231 Total net assets acquired 2,355 Goodwill recognized $ 849 A summary of the cash paid and estimated fair value adjustments resulting in the goodwill recorded in the acquisition of three branch banking offices and certain deposits from Bank of America on March 18, 2016 are presented below: March 18, 2016 (in thousands) Cash paid $ 3,204 Cost basis net assets acquired — Fair value adjustments: Loans — Premises and Equipment (309 ) Core deposit intangible (2,046 ) Goodwill $ 849 As part of the acquisition of three branch banking offices from Bank of America, the Company performed a valuation of premises and equipment acquired. This valuation resulted in a $309,000 increase in the net book value of the land and buildings acquired, and was based on current appraisals of such land and buildings. The Company recognized a core deposit intangible of $2,046,000 related to the acquisition of the core deposits. The recorded core deposit intangibles represented approximately 1.50% of the core deposits acquired and will be amortized over their estimated useful lives of 7 years. A valuation of the time deposits acquired was also performed as of the acquisition date. Time deposits were split into similar pools based on size, type of time deposits, and maturity. A discounted cash flow analysis was performed on the pools based on current market rates currently paid on similar time deposits. The valuation resulted in no material fair value discount or premium, and none was recorded.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 3 - Investment Securities The amortized cost and estimated fair values of investments in debt and equity securities are summarized in the following tables: March 31, 2016 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value Securities Available for Sale (in thousands) Obligations of U.S. government corporations and agencies $ 354,388 $ 5,903 $ (38 ) $ 360,253 Obligations of states and political subdivisions 111,796 2,552 (174 ) 114,174 Marketable equity securities 3,000 27 — 3,027 Total securities available for sale $ 469,184 $ 8,482 $ (212 ) $ 477,454 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 690,592 $ 18,317 $ (42 ) $ 708,867 Obligations of states and political subdivisions 14,541 402 (33 ) 14,910 Total securities held to maturity $ 705,133 $ 18,719 $ (75 ) $ 723,777 December 31, 2015 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value Securities Available for Sale (in thousands) Obligations of U.S. government corporations and agencies $ 312,917 $ 2,761 $ (1,996 ) $ 313,682 Obligations of states and political subdivisions 86,823 1,428 (33 ) 88,218 Corporate debt securities — — — — Marketable equity securities 3,000 — (15 ) 2,985 Total securities available for sale $ 402,740 $ 4,189 $ (2,044 ) $ 404,885 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 711,994 $ 8,394 $ (2,882 ) $ 717,506 Obligations of states and political subdivisions 14,536 277 (110 ) 14,703 Total securities held to maturity $ 726,530 $ 8,671 $ (2,992 ) $ 732,209 No investment securities were sold during the three months ended March 31, 2016 or the three months ended March 31, 2015. Investment securities with an aggregate carrying value of $288,887,000 and $297,547,000 at March 31, 2016 and December 31, 2015, respectively, were pledged as collateral for specific borrowings, lines of credit and local agency deposits. The amortized cost and estimated fair value of debt securities at March 31, 2016 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At March 31, 2016, obligations of U.S. government corporations and agencies with a cost basis totaling $1,044,980,000 consist almost entirely of mortgage-backed securities whose contractual maturity, or principal repayment, will follow the repayment of the underlying mortgages. For purposes of the following table, the entire outstanding balance of these mortgage-backed securities issued by U.S. government corporations and agencies is categorized based on final maturity date. At March 31, 2016, the Company estimates the average remaining life of these mortgage-backed securities issued by U.S. government corporations and agencies to be approximately 4.8 years. Average remaining life is defined as the time span after which the principal balance has been reduced by half. Investment Securities Available for Sale Held to Maturity (In thousands) Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value Due in one year $ 5 $ 5 — — Due after one year through five years 13,608 14,124 $ 1,154 $ 1,178 Due after five years through ten years 16,948 17,856 838 899 Due after ten years 438,623 445,469 703,141 721,700 Totals $ 469,184 $ 477,454 $ 705,133 $ 723,777 Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2016 Value Loss Value Loss Value Loss Securities Available for Sale: (in thousands) Obligations of U.S. government corporations and agencies $ 31,493 $ (38 ) — — $ 31,493 $ (38 ) Obligations of states and political subdivisions 18,092 (164 ) $ 2,777 $ (10 ) 20,869 (174 ) Marketable equity securities — — — — — — Total securities available-for-sale $ 49,585 $ (202 ) $ 2,777 $ (10 ) $ 52,362 $ (212 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies — — $ 16,205 $ (42 ) $ 16,025 $ (42 ) Obligations of states and political subdivisions $ 1,188 $ (33 ) — — 1,188 (33 ) Total securities held-to-maturity $ 1,188 $ (33 ) $ 16,025 $ (42 ) $ 17,213 $ (75 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Value Loss Value Loss Value Loss Securities Available for Sale: (in thousands) Obligations of U.S. government corporations and agencies $ 193,306 $ (1,996 ) — — $ 193,306 $ (1,996 ) Obligations of states and political subdivisions 6,469 (33 ) — — 6,469 (33 ) Marketable equity securities 2,985 (15 ) — — 2,985 (15 ) Total securities available-for-sale $ 202,760 $ (2,044 ) — — $ 202,760 $ (2,044 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 198,481 $ (2,882 ) — — $ 198,481 $ (2,882 ) Obligations of states and political subdivisions 497 (11 ) $ 1,121 $ (99 ) 1,618 (110 ) Total securities held-to-maturity $ 198,978 $ (2,893 ) $ 1,121 $ (99 ) $ 200,099 $ (2,992 ) Obligations of U.S. government corporations and agencies: Unrealized losses on investments in obligations of U.S. government corporations and agencies are caused by interest rate increases. The contractual cash flows of these securities are guaranteed by U.S. Government Sponsored Entities (principally Fannie Mae and Freddie Mac). It is expected that the securities would not be settled at a price less than the amortized cost of the investment. Because the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, these investments are not considered other-than-temporarily impaired. At March 31, 2016, 5 debt securities representing obligations of U.S. government corporations and agencies had unrealized losses with aggregate depreciation of (0.17%) from the Company’s amortized cost basis. Obligations of states and political subdivisions: The unrealized losses on investments in obligations of states and political subdivisions were caused by increases in required yields by investors in these types of securities. It is expected that the securities would not be settled at a price less than the amortized cost of the investment. Because the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, these investments are not considered other-than-temporarily impaired. At March 31, 2016, 15 debt securities representing obligations of states and political subdivisions had unrealized losses with aggregate depreciation of (0.93%) from the Company’s amortized cost basis. Marketable equity securities: At March 31, 2016, no marketable equity securities had unrealized losses.

Loans

Loans	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Loans	Note 4 – Loans A summary of loan balances follows (in thousands): March 31, 2016 PCI - PCI - Originated PNCI Cash basis Other Total Mortgage loans on real estate: Residential 1-4 family $ 212,382 $ 101,117 — $ 1,636 $ 315,135 Commercial 1,209,721 286,943 — 17,189 1,513,853 Total mortgage loan on real estate 1,422,103 388,060 — 18,825 1,828,988 Consumer: Home equity lines of credit 277,253 28,148 $ 4,647 2,643 312,691 Home equity loans 35,712 4,016 124 1,513 41,365 Auto Indirect — — — — — Other 29,863 3,018 — 64 32,945 Total consumer loans 342,828 35,182 4,771 4,220 387,001 Commercial 174,505 17,521 — 4,531 196,557 Construction: Residential 38,748 13,523 — 712 52,983 Commercial 68,311 7,707 — — 76,018 Total construction 107,059 21,230 — 712 129,001 Total loans, net of deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Total principal balance of loans owed, net of charge-offs $ 2,052,057 $ 475,095 $ 12,085 $ 33,356 $ 2,572,593 Unamortized net deferred loan fees (5,562 ) — — — (5,562 ) Discounts to principal balance of loans owed, net of charge-offs — (13,102 ) (7,314 ) (5,068 ) (25,484 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Noncovered loans $ 2,046,495 $ 461,993 $ 4,771 $ 23,532 $ 2,536,791 Covered loans — — — 4,756 4,756 Total loans, net of unamortized deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Allowance for loan losses $ (31,168 ) $ (2,222 ) $ (118 ) $ (2,880 ) $ (36,388 ) A summary of loan balances follows (in thousands): December 31, 2015 PCI - PCI - Originated PNCI Cash basis Other Total Mortgage loans on real estate: Residential 1-4 family $ 207,585 $ 104,535 — $ 2,145 $ 314,265 Commercial 1,163,643 310,864 — 23,060 1,497,567 Total mortgage loan on real estate 1,371,228 415,399 — 25,205 1,811,832 Consumer: Home equity lines of credit 285,419 29,335 $ 4,954 2,784 322,492 Home equity loans 34,717 4,018 124 1,503 40,362 Other 28,998 3,367 — 64 32,429 Total consumer loans 349,134 36,720 5,078 4,351 395,283 Commercial 170,320 19,744 1 4,848 194,913 Construction: Residential 31,778 13,636 — 721 46,135 Commercial 66,285 8,489 — — 74,774 Total construction 98,063 22,125 — 721 120,909 Total loans, net of deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Total principal balance of loans owed, net of charge-offs $ 1,995,296 $ 507,935 $ 12,686 $ 39,693 $ 2,555,610 Unamortized net deferred loan fees (6,551 ) — — — (6,551 ) Discounts to principal balance of loans owed, net of charge-offs — (13,947 ) (7,607 ) (4,568 ) (26,122 ) Total loans, net of unamortized deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Noncovered loans $ 1,988,745 $ 493,988 $ 5,079 $ 29,890 $ 2,517,702 Covered loans — — — 5,235 5,235 Total loans, net of unamortized deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Allowance for loan losses $ (31,271 ) $ (1,848 ) $ (121 ) $ (2,771 ) $ (36,011 ) The following is a summary of the change in accretable yield for PCI – other loans during the periods indicated (in thousands): Three months ended March 31, 2016 2015 Change in accretable yield: Balance at beginning of period $ 13,255 $ 14,159 Accretion to interest income (1,091 ) (1,818 ) Reclassification (to) from nonaccretable difference (184 ) 1,061 Balance at end of period $ 11,980 $ 13,402

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Allowance for Loan Losses	Note 5 – Allowance for Loan Losses The following tables summarize the activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated. Allowance for Loan Losses – Three Months Ended March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 2,507 $ 11,443 $ 11,253 $ 3,138 — $ 688 $ 5,271 $ 899 $ 812 $ 36,011 Charge-offs (37 ) (793 ) (214 ) — — (207 ) (38 ) — — (1,289 ) Recoveries 2 817 281 49 — 130 177 — 1 1,457 (Benefit) provision 293 428 (1,413 ) (76 ) — 76 729 167 5 209 Ending balance $ 2,765 $ 11,895 $ 9,907 $ 3,111 — $ 687 $ 6,139 $ 1,066 $ 818 $ 36,388 Ending balance: Individ. evaluated for impairment $ 454 $ 295 $ 705 $ 248 — $ 84 $ 1,934 — — $ 3,720 Loans pooled for evaluation $ 2,094 $ 10,141 $ 9,083 $ 2,864 — $ 603 $ 3,053 $ 1,014 $ 818 $ 29,670 Loans acquired with deteriorated credit quality $ 217 $ 1,459 $ 117 — — — $ 1,153 $ 52 — $ 2,998 Loans, net of unearned fees – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 315,135 $ 1,513,853 $ 312,691 $ 41,365 — $ 32,945 $ 196,557 $ 52,983 $ 76,018 $ 2,541,547 Individ. evaluated for impairment $ 7,015 $ 12,230 $ 5,994 $ 1,928 — $ 300 $ 3,871 — — $ 31,338 Loans pooled for evaluation $ 306,484 $ 1,484,434 $ 299,407 $ 37,800 — $ 32,581 $ 188,155 $ 52,271 $ 76,018 $ 2,477,150 Loans acquired with Deteriorated credit quality $ 1,636 $ 17,189 $ 7,290 $ 1,637 — $ 64 $ 4,531 $ 712 — $ 33,059 Allowance for Loan Losses - Year Ended December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 3,086 $ 9,227 $ 15,676 $ 1,797 $ 9 $ 719 $ 4,226 $ 1,434 $ 411 $ 36,585 Charge-offs (224 ) — (694 ) (242 ) (4 ) (972 ) (680 ) — — (2,816 ) Recoveries 204 243 666 252 42 500 677 1,728 140 4,452 (Benefit) provision (559 ) 1,973 (4,395 ) 1,331 (47 ) 441 1,048 (2,263 ) 261 (2,210 ) Ending balance $ 2,507 $ 11,443 $ 11,253 $ 3,138 — $ 688 $ 5,271 $ 899 $ 812 $ 36,011 Ending balance: Individ. evaluated for impairment $ 335 $ 395 $ 605 $ 294 — $ 74 $ 1,187 — — $ 2,890 Loans pooled for evaluation $ 2,112 $ 9,596 $ 10,423 $ 2,844 — $ 614 $ 2,983 $ 844 $ 812 $ 30,228 Loans acquired with deteriorated credit quality $ 60 $ 1,452 $ 225 — — — $ 1,101 $ 55 — $ 2,893 Loans, net of unearned fees – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 314,265 $ 1,497,567 $ 322,492 $ 40,362 — $ 32,429 $ 194,913 $ 46,135 $ 74,774 $ 2,522,937 Individ. evaluated for impairment $ 6,767 $ 32,407 $ 5,747 $ 1,731 — $ 288 $ 2,671 $ 4 $ 490 $ 50,105 Loans pooled for evaluation $ 305,353 $ 1,442,100 $ 309,007 $ 37,004 — $ 32,077 $ 187,393 $ 45,410 $ 74,284 $ 2,432,628 Loans acquired with deteriorated credit quality $ 2,145 $ 23,060 $ 7,738 $ 1,627 — $ 64 $ 4,849 $ 721 — $ 40,204 Allowance for Loan Losses – Three Months Ended March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 3,086 $ 9,227 $ 15,676 $ 1,797 $ 9 $ 719 $ 4,226 $ 1,434 $ 411 $ 36,585 Charge-offs (81 ) — (341 ) (11 ) — (268 ) (534 ) — — (1,235 ) Recoveries 1 96 119 3 20 152 87 11 19 508 (Benefit) provision (241 ) 1,128 (221 ) 191 (23 ) 41 197 (695 ) (180 ) 197 Ending balance $ 2,765 $ 10,451 $ 15,233 $ 1,980 $ 6 $ 644 $ 3,976 $ 750 $ 250 $ 36,055 Ending balance: Individ. evaluated for impairment $ 988 $ 799 $ 1,857 $ 337 $ 1 $ 92 $ 559 $ 59 — $ 4,692 Loans pooled for evaluation $ 1,709 $ 8,464 $ 12,932 $ 1,643 $ 5 $ 552 $ 2,205 $ 505 $ 250 $ 28,265 Loans acquired with deteriorated credit quality $ 69 $ 1,188 $ 443 — — — $ 1,212 $ 186 — $ 3,098 Loans, net of unearned fees – As of March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 282,383 $ 1,364,480 $ 345,210 $ 32,486 $ 32 $ 32,999 $ 177,540 $ 40,105 $ 45,648 $ 2,320,883 Individ. evaluated for impairment $ 7,786 $ 44,523 $ 6,290 $ 1,359 $ 14 $ 338 $ 1,967 $ 2,655 $ 94 $ 65,026 Loans pooled for evaluation $ 270,571 $ 1,292,006 $ 329,961 $ 30,374 $ 18 $ 32,591 $ 168,517 $ 36,714 $ 45,554 $ 2,206,306 Loans acquired with deteriorated credit quality $ 4,026 $ 27,951 $ 8,959 $ 753 — $ 70 $ 7,056 $ 736 — $ 49,551 As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including, but not limited to, trends relating to (i) the level of criticized and classified loans, (ii) net charge-offs, (iii) non-performing loans, and (iv) delinquency within the portfolio. The Company utilizes a risk grading system to assign a risk grade to each of its loans. Loans are graded on a scale ranging from Pass to Loss. A description of the general characteristics of the risk grades is as follows: • Pass • Special Mention • Substandard • Doubtful • Loss The following tables present ending loan balances by loan category and risk grade for the periods indicated: Credit Quality Indicators – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loans: Pass $ 204,764 $ 1,185,024 $ 267,767 $ 31,962 — $ 29,237 $ 168,284 $ 38,414 $ 68,311 $ 1,993,763 Special mention 2,178 10,483 2,760 1,104 — 459 3,517 334 — 20,835 Substandard 5,440 14,214 6,726 2,646 — 167 2,704 — — 31,897 Loss — — — — — — — — — — Total originated $ 212,382 $ 1,209,721 $ 277,253 $ 35,712 — $ 29,863 $ 174,505 $ 38,748 $ 68,311 $ 2,046,495 PNCI loans: Pass $ 99,140 $ 267,577 $ 26,632 $ 3,791 — $ 2,829 $ 17,252 $ 13,523 $ 7,707 $ 438,451 Special mention 593 11,550 410 77 — 62 — — — 12,692 Substandard 1,384 7,816 1,106 148 — 127 269 — — 10,850 Loss — — — — — — — — — — Total PNCI $ 101,117 $ 286,943 $ 28,148 $ 4,016 — $ 3,018 $ 17,521 $ 13,523 $ 7,707 $ 461,993 PCI loans $ 1,636 $ 17,189 $ 7,290 $ 1,637 — $ 64 $ 4,531 $ 712 — $ 33,059 Total loans $ 315,135 $ 1,513,853 $ 312,691 $ 41,365 — $ 32,945 $ 196,557 $ 52,983 $ 76,018 $ 2,541,547 Credit Quality Indicators – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loans: Pass $ 199,837 $ 1,118,868 $ 275,251 $ 31,427 — $ 28,339 $ 166,559 $ 31,440 $ 66,285 $ 1,918,006 Special mention 2,018 10,321 2,494 1,027 — 415 1,037 334 — 17,646 Substandard 5,730 34,454 7,674 2,263 — 244 2,724 4 — 53,093 Loss — — — — — — — — — — Total originated $ 207,585 $ 1,163,643 $ 285,419 $ 34,717 — $ 28,998 $ 170,320 $ 31,778 $ 66,285 $ 1,988,745 PNCI loans: Pass $ 102,895 $ 293,935 $ 27,378 $ 3,789 — $ 3,164 $ 19,666 $ 13,636 $ 8,489 $ 472,952 Special mention 600 10,795 445 80 — 74 — — — 11,994 Substandard 1,040 6,134 1,512 149 — 129 78 — — 9,042 Loss — — — — — — — — — — Total PNCI $ 104,535 $ 310,864 $ 29,335 $ 4,018 — $ 3,367 $ 19,744 $ 13,636 $ 8,489 $ 493,988 PCI loans $ 2,145 $ 23,060 $ 7,738 $ 1,627 — $ 64 $ 4,849 $ 721 — $ 40,204 Total loans $ 314,265 $ 1,497,567 $ 322,492 $ 40,362 — $ 32,429 $ 194,913 $ 46,135 $ 74,774 $ 2,522,937 Consumer loans, whether unsecured or secured by real estate, automobiles, or other personal property, are susceptible to three primary risks; non-payment due to income loss, over-extension of credit and, when the borrower is unable to pay, shortfall in collateral value. Typically non-payment is due to loss of job and will follow general economic trends in the marketplace driven primarily by rises in the unemployment rate. Loss of collateral value can be due to market demand shifts, damage to collateral itself or a combination of the two. Problem consumer loans are generally identified by payment history of the borrower (delinquency). The Bank manages its consumer loan portfolios by monitoring delinquency and contacting borrowers to encourage repayment, suggest modifications if appropriate, and, when continued scheduled payments become unrealistic, initiate repossession or foreclosure through appropriate channels. Collateral values may be determined by appraisals obtained through Bank approved, licensed appraisers, qualified independent third parties, public value information (blue book values for autos), sales invoices, or other appropriate means. Appropriate valuations are obtained at initiation of the credit and periodically (every 3-12 months depending on collateral type) once repayment is questionable and the loan has been classified. Commercial real estate loans generally fall into two categories, owner-occupied and non-owner occupied. Loans secured by owner occupied real estate are primarily susceptible to changes in the business conditions of the related business. This may be driven by, among other things, industry changes, geographic business changes, changes in the individual fortunes of the business owner, and general economic conditions and changes in business cycles. These same risks apply to commercial loans whether secured by equipment or other personal property or unsecured. Losses on loans secured by owner occupied real estate, equipment, or other personal property generally are dictated by the value of underlying collateral at the time of default and liquidation of the collateral. When default is driven by issues related specifically to the business owner, collateral values tend to provide better repayment support and may result in little or no loss. Alternatively, when default is driven by more general economic conditions, underlying collateral generally has devalued more and results in larger losses due to default. Loans secured by non-owner occupied real estate are primarily susceptible to risks associated with swings in occupancy or vacancy and related shifts in lease rates, rental rates or room rates. Most often these shifts are a result of changes in general economic or market conditions or overbuilding and resultant over-supply. Losses are dependent on value of underlying collateral at the time of default. Values are generally driven by these same factors and influenced by interest rates and required rates of return as well as changes in occupancy costs. Construction loans, whether owner occupied or non-owner occupied commercial real estate loans or residential development loans, are not only susceptible to the related risks described above but the added risks of construction itself including cost over-runs, mismanagement of the project, or lack of demand or market changes experienced at time of completion. Again, losses are primarily related to underlying collateral value and changes therein as described above. Problem C&I loans are generally identified by periodic review of financial information which may include financial statements, tax returns, rent rolls and payment history of the borrower (delinquency). Based on this information the Bank may decide to take any of several courses of action including demand for repayment, additional collateral or guarantors, and, when repayment becomes unlikely through borrower’s income and cash flow, repossession or foreclosure of the underlying collateral. Collateral values may be determined by appraisals obtained through Bank approved, licensed appraisers, qualified independent third parties, public value information (blue book values for autos), sales invoices, or other appropriate means. Appropriate valuations are obtained at initiation of the credit and periodically (every 3-12 months depending on collateral type) once repayment is questionable and the loan has been classified. Once a loan becomes delinquent and repayment becomes questionable, a Bank collection officer will address collateral shortfalls with the borrower and attempt to obtain additional collateral. If this is not forthcoming and payment in full is unlikely, the Bank will estimate its probable loss, using a recent valuation as appropriate to the underlying collateral less estimated costs of sale, and charge the loan down to the estimated net realizable amount. Depending on the length of time until ultimate collection, the Bank may revalue the underlying collateral and take additional charge-offs as warranted. Revaluations may occur as often as every 3-12 months depending on the underlying collateral and volatility of values. Final charge-offs or recoveries are taken when collateral is liquidated and actual loss is known. Unpaid balances on loans after or during collection and liquidation may also be pursued through lawsuit and attachment of wages or judgment liens on borrower’s other assets. The following table shows the ending balance of current, past due, and nonaccrual originated loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual Originated Loans – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loan balance: Past due: 30-59 Days $ 1,018 $ 496 $ 1,076 $ 641 — $ 59 $ 290 — — $ 3,580 60-89 Days 72 — 237 497 — 20 195 — — 1,021 > 90 Days 271 643 356 154 — 11 794 — — 2,229 Total past due 1,361 1,139 1,669 1,292 — 90 1,279 — — 6,830 Current 211,021 1,208,582 275,584 34,420 — 29,773 173,226 $ 38,748 $ 68,311 2,039,665 Total orig. loans $ 212,382 $ 1,209,721 $ 277,253 $ 35,712 — $ 29,863 $ 174,505 $ 38,748 $ 68,311 $ 2,046,495 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 2,963 $ 2,794 $ 3,383 $ 1,292 — $ 11 $ 2,204 $ 12 — $ 12,659 The following table shows the ending balance of current, past due, and nonaccrual PNCI loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual PNCI Loans – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total PNCI loan balance: Past due: 30-59 Days $ 1,523 — — $ 60 — $ 4 — — $ 56 $ 1,643 60-89 Days — — — — — — — — — — > 90 Days 401 $ 80 $ 18 71 — 9 — — — 579 Total past due 1,924 80 18 131 — 13 — — 56 2,222 Current 99,193 286,863 28,130 3,885 — 3,005 $ 17,521 $ 13,523 7,651 459,771 Total PNCI loans $ 101,117 $ 286,943 $ 28,148 $ 4,016 — $ 3,018 $ 17,521 $ 13,523 $ 7,707 $ 461,993 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 679 $ 2,736 $ 539 $ 108 — $ 31 — — — $ 4,093 The following table shows the ending balance of current, past due, and nonaccrual originated loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual Originated Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loan balance: Past due: 30-59 Days $ 791 $ 200 $ 1,033 $ 402 — $ 12 $ 2,197 — — $ 4,635 60-89 Days — 491 324 341 — 40 — — — 1,196 > 90 Days 271 3,425 520 82 — 19 24 — — 4,341 Total past due 1,062 4,116 1,877 825 — 71 2,221 — — 10,172 Current 206,523 1,159,527 283,542 33,892 — 28,927 168,099 $ 31,778 $ 66,285 1,978,573 Total orig. loans $ 207,585 $ 1,163,643 $ 285,419 $ 34,717 — $ 28,998 $ 170,320 $ 31,778 $ 66,285 $ 1,988,745 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 3,045 $ 14,196 $ 3,379 $ 1,195 — $ 21 $ 976 $ 12 — $ 22,824 The following table shows the ending balance of current, past due, and nonaccrual PNCI loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual PNCI Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total PNCI loan balance: Past due: 30-59 Days $ 3,106 $ 4,037 $ 92 $ 23 — — $ 1 — — $ 7,259 60-89 Days — — — — — $ 13 — — — 13 > 90 Days 58 748 275 71 — 10 — — $ 490 1,652 Total past due 3,164 4,785 367 94 — 23 1 — 490 8,924 Current 101,371 306,079 28,968 3,924 — 3,344 19,743 $ 13,636 7,999 485,064 Total PNCI loans $ 104,535 $ 310,864 $ 29,335 $ 4,018 — $ 3,367 $ 19,744 $ 13,636 $ 8,489 $ 493,988 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 348 $ 3,742 $ 676 $ 109 — $ 33 — — $ 490 $ 5,398 Impaired originated loans are those where management has concluded that it is probable that the borrower will be unable to pay all amounts due under the contractual terms. The following tables show the recorded investment (financial statement balance), unpaid principal balance, average recorded investment, and interest income recognized for impaired Originated and PNCI loans, segregated by those with no related allowance recorded and those with an allowance recorded for the periods indicated. Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,806 $ 7,917 $ 3,457 $ 1,154 $ 1 $ 10 $ 520 — — $ 16,865 Unpaid principal $ 5,963 $ 8,393 $ 6,325 $ 1,598 $ 10 $ 14 $ 635 $ 63 — $ 23,001 Average recorded Investment $ 3,846 $ 17,513 $ 3,210 $ 1,051 $ 2 $ 13 $ 548 $ 2 — $ 26,185 Interest income Recognized $ 19 $ 72 $ 8 $ 3 — — $ 7 — — $ 109 With an allowance recorded: Recorded investment $ 1,991 $ 1,440 $ 1,304 $ 666 — — $ 3,351 — — $ 8,752 Unpaid principal $ 2,065 $ 1,480 $ 1,393 $ 696 — — $ 3,376 — — $ 9,010 Related allowance $ 324 $ 175 $ 474 $ 248 — — $ 1,934 — — $ 3,155 Average recorded Investment $ 1,998 $ 1,429 $ 1,514 $ 670 — $ 1 $ 2,722 — — $ 8,334 Interest income Recognized $ 13 $ 20 $ 4 $ 5 — — $ 34 — — $ 76 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 604 $ 844 $ 539 $ 108 — $ 31 — — — $ 2,126 Unpaid principal $ 643 $ 908 $ 597 $ 112 — $ 51 — — — $ 2,311 Average recorded Investment $ 740 $ 988 $ 497 $ 89 — $ 32 $ 1 — $ 245 $ 2,592 Interest income Recognized $ 2 — — — — — — — — $ 2 With an allowance recorded: Recorded investment $ 614 $ 2,029 $ 694 — — $ 258 — — — $ 3,595 Unpaid principal $ 614 $ 2,142 $ 694 — — $ 258 — — — $ 3,708 Related allowance $ 130 $ 120 $ 231 — — $ 84 — — — $ 565 Average recorded Investment $ 307 $ 2,389 $ 650 $ 19 — $ 246 — — — $ 3,611 Interest income Recognized $ 2 $ 2 $ 7 — — $ 3 — — — $ 14 Impaired Originated Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,886 $ 27,109 $ 2,963 $ 947 — $ 20 $ 576 $ 4 — $ 35,505 Unpaid principal $ 5,998 $ 29,678 $ 6,079 $ 1,349 — $ 35 $ 688 $ 65 — $ 43,892 Average recorded Investment $ 3,586 $ 32,793 $ 2,982 $ 848 — $ 29 $ 494 $ 1,202 $ 50 $ 41,984 Interest income Recognized $ 81 $ 893 $ 23 $ 5 — — $ 29 — — $ 1,031 With an allowance recorded: Recorded investment $ 2,006 $ 1,418 $ 1,724 $ 674 — $ 1 $ 2,094 — — $ 7,917 Unpaid principal $ 2,073 $ 1,453 $ 1,904 $ 701 — $ 1 $ 2,117 — — $ 8,249 Related allowance $ 335 $ 146 $ 525 $ 256 — $ 1 $ 1,187 — — $ 2,450 Average recorded Investment $ 2,365 $ 2,180 $ 2,455 $ 589 — $ 23 $ 1,716 $ 141 — $ 9,469 Interest income Recognized $ 49 $ 74 $ 31 $ 26 — — $ 122 — — $ 302 Impaired PNCI Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 875 $ 1,132 $ 454 $ 71 — $ 33 $ 1 — $ 490 $ 3,056 Unpaid principal $ 908 $ 1,248 $ 505 $ 73 — $ 52 $ 1 — $ 490 $ 3,277 Average recorded Investment $ 609 $ 749 $ 400 $ 48 — $ 35 $ 4 — $ 245 $ 2,090 Interest income Recognized $ 31 $ 32 $ 3 $ 2 — $ 1 — — $ 18 $ 87 With an allowance recorded: Recorded investment — $ 2,748 $ 606 $ 39 — $ 234 — — — $ 3,627 Unpaid principal — $ 2,858 $ 612 $ 40 — $ 234 — — — $ 3,744 Related allowance — $ 248 $ 80 $ 39 — $ 73 — — — $ 440 Average recorded Investment $ 417 $ 1,447 $ 521 $ 19 — $ 227 — — — $ 2,631 Interest income Recognized — $ 149 $ 14 — — $ 11 — — — $ 174 Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,360 $ 40,094 $ 2,631 $ 870 $ 10 $ 19 $ 748 $ 2,373 $ 94 $ 50,199 Unpaid principal $ 5,330 $ 43,898 $ 5,791 $ 1,335 $ 30 $ 23 $ 776 $ 6,585 $ 186 $ 63,954 Average recorded Investment $ 3,323 $ 39,286 $ 2,816 $ 810 $ 12 $ 22 $ 580 $ 2,387 $ 96 $ 49,332 Interest income Recognized $ 8 $ 283 — — — — $ 11 — — $ 302 With an allowance recorded: Recorded investment $ 3,402 $ 3,281 $ 2,808 $ 464 $ 4 $ 43 $ 1,214 $ 282 — $ 11,498 Unpaid principal $ 3,570 $ 3,432 $ 3,077 $ 566 $ 6 $ 53 $ 1,316 $ 282 — $ 12,302 Related allowance $ 915 $ 598 $ 1,636 $ 337 $ 1 $ 17 $ 559 $ 59 — $ 4,122 Average recorded Investment $ 3,063 $ 3,112 $ 2,997 $ 484 $ 4 $ 42 $ 1,276 $ 282 — $ 11,260 Interest income Recognized $ 22 $ 40 $ 12 $ 1 — — $ 15 $ 4 — $ 94 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 389 $ 313 $ 414 $ 25 — $ 59 $ 5 — — $ 1,205 Unpaid principal $ 488 $ 2,601 $ 450 $ 25 — $ 78 $ 5 — — $ 3,647 Average recorded Investment $ 366 $ 339 $ 380 $ 25 — $ 48 $ 6 — — $ 1,164 Interest income Recognized $ 1 — — — — — — — — $ 1 With an allowance recorded: Recorded investment $ 635 $ 835 $ 437 — — $ 217 — — — $ 2,124 Unpaid principal $ 644 $ 838 $ 437 — — $ 217 — — — $ 2,136 Related allowance $ 73 $ 201 $ 221 — — $ 75 — — — $ 570 Average recorded Investment $ 734 $ 490 $ 436 — — $ 219 — — — $ 1,879 Interest income Recognized $ 2 $ 10 $ 4 — — $ 2 — — — $ 18 At March 31, 2016, $15,921,000 of originated loans were TDR and classified as impaired. The Company had obligations to lend $15,000 of additional funds on these TDR as of March 31, 2016. At March 31, 2016, $1,792,000 of PNCI loans were TDR and classified as impaired. The Company had no obligations to lend additional funds on these TDR as of March 31, 2016. At December 31, 2015, $29,269,000 of Originated loans were TDRs and classified as impaired. The Company had obligations to lend $35,000 of additional funds on these TDRs as of December 31, 2015. At December 31, 2015, $1,396,000 of PNCI loans were TDRs and classified as impaired. The Company had no obligations to lend additional funds on these TDRs as of December 31, 2015. At March 31, 2015, $45,641,000 of originated loans were TDR and classified as impaired. The Company had obligations to lend $4,000 of additional funds on these TDR as of March 31, 2015. At March 31, 2015, $1,231,000 of PNCI loans were TDR and classified as impaired. The Company had no obligations to lend additional funds on these TDR as of March 31, 2015. The following tables show certain information regarding Troubled Debt Restructurings (TDRs) that occurred during the periods indicated: TDR Information for the Three Months Ended March 31, 2016 RE Mortgage Home Equity Auto Other Construction (dollars in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Number — 2 1 1 — — 1 — — 5 Pre-mod outstanding principal balance — $ 78 $ 132 $ 105 — — $ 12 — — $ 327 Post-mod outstanding principal balance — $ 115 $ 132 $ 105 — — $ 12 — — $ 364 Financial impact due to TDR taken as additional provision — — $ 19 — — — $ 8 — — $ 27 Number that defaulted during the period — — — — — — — — — — Recorded investment of TDRs that defaulted during the period — — — — — — — — — — the default of previous TDR taken as charge-offs or additional provisions — — — — — — — — — — The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the Three Months Ended March 31, 2015 RE Mortgage Home Equity Auto Other Construction (dollars in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Number 1 1 — — — 2 1 — — 5 Pre-mod outstanding principal balance $ 108 $ 124 — — — $ 89 $ 287 — — $ 608 Post-mod outstanding principal balance $ 110 $ 124 — — — $ 89 $ 288 — — $ 611 Financial impact due to TDR taken as additional provision $ 8 $ (5 ) — — — $ 5 $ 164 — — $ 172 Number that defaulted during the period — — 1 — — — — — — 1 Recorded investment of TDRs that defaulted during the period — — $ 47 — — — — — — $ 47 the default of previous TDR taken as charge-offs or additional provisions — — — — — — — — — — Modifications classified as TDRs can include one or a combination of the following: rate modifications, term extensions, interest only modifications, either temporary or long-term, payment modifications, and collateral substitutions/additions. For all new TDRs, an impairment analysis is conducted. If the loan is determined to be collateral dependent, any additional amount of impairment will be calculated based on the difference between estimated collectible value and the current carrying balance of the loan. This difference could result in an increased provision and is typically charged off. If the asset is determined not to be collateral dependent, the impairment is measured on the net present value difference between the expected cash flows of the restructured loan and the cash flows which would have been received under the original terms. The effect of this could result in a requirement for additional provision to the reserve. The effect of these required provisions for the period are indicated above. Typically if a TDR defaults during the period, the loan is then considered collateral dependent and, if it was not already considered collateral dependent, an appropriate provision will be reserved or charge will be taken. The additional provisions required resulting from default of previously modified TDR’s are noted above.

Foreclosed Assets

Foreclosed Assets	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Foreclosed Assets	Note 6 – Foreclosed Assets A summary of the activity in the balance of foreclosed assets follows (in thousands): Three months ended March 31, 2016 Three months ended March 31, 2015 Noncovered Covered Total Noncovered Covered Total Beginning balance, net $ 5,369 — $ 5,369 $ 4,449 $ 445 $ 4,894 Additions/transfers from loans 416 — 416 1,560 — 1,560 Dispositions/sales (1,325 ) — (1,325 ) (495 ) — (495 ) Valuation adjustments 11 — 11 (67 ) — (67 ) Ending balance, net $ 4,471 — $ 4,471 $ 5,447 $ 445 $ 5,892 Ending valuation allowance $ 572 — $ 572 $ 263 — $ 263 Ending number of foreclosed assets 21 21 29 1 30 Proceeds from sale of foreclosed assets $ 1,417 — $ 1,417 $ 806 — $ 806 Gain on sale of foreclosed assets $ 92 — $ 92 $ 311 — $ 311 As of March 31, 2016, $1,926,000 of foreclosed residential real estate properties, all of which the Company has obtained physical possession of, are included in foreclosed assets. At March 31, 2016, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are underway is $444,000.

Premises and Equipment

Premises and Equipment	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 7 - Premises and Equipment Premises and equipment were comprised of: March 31, December 31, (In thousands) Land & land improvements $ 11,051 $ 8,909 Buildings 46,245 38,643 Furniture and equipment 27,130 31,081 84,426 78,633 Less: Accumulated depreciation (33,053 ) (35,518 ) 51,373 43,115 Construction in progress 149 696 Total premises and equipment $ 51,522 $ 43,811 Depreciation expense for premises and equipment amounted to $1,271,000 and $1,268,000 for the three months ended March 31, 2016 and 2015, respectively.

Cash Value of Life Insurance

Cash Value of Life Insurance	3 Months Ended
	Mar. 31, 2016
Investments, All Other Investments [Abstract]
Cash Value of Life Insurance	Note 8 – Cash Value of Life Insurance A summary of the activity in the balance of cash value of life insurance follows (in thousands): Three months ended March 31, 2016 2015 Beginning balance $ 94,560 $ 92,337 Increase in cash value of life insurance 696 675 Ending balance $ 95,256 $ 93,012 End of period death benefit $ 166,216 $ 165,847 Number of policies owned 187 189 Insurance companies used 14 14 Current and former employees and directors covered 59 60 As of March 31, 2016, the Bank was the owner and beneficiary of 187 life insurance policies, issued by 14 life insurance companies, covering 59 current and former employees and directors. These life insurance policies are recorded on the Company’s financial statements at their reported cash (surrender) values. As a result of current tax law and the nature of these policies, the Bank records any increase in cash value of these policies as nontaxable noninterest income. If the Bank decided to surrender any of the policies prior to the death of the insured, such surrender may result in a tax expense related to the life-to-date cumulative increase in cash value of the policy. If the Bank retains such policies until the death of the insured, the Bank would receive nontaxable proceeds from the insurance company equal to the death benefit of the policies. The Bank has entered into Joint Beneficiary Agreements (JBAs) with certain of the insured that for certain of the policies provide some level of sharing of the death benefit, less the cash surrender value, among the Bank and the beneficiaries of the insured upon the receipt of death benefits. See Note 15 of these condensed consolidated financial statements for additional information on JBAs.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 9 - Goodwill and Other Intangible Assets The following table summarizes the Company’s goodwill intangible as of the dates indicated: (dollar in thousands) March 31, Additions Reductions December 31, Goodwill $ 64,311 $ 849 — $ 63,462 The following table summarizes the Company’s core deposit intangibles as of the dates indicated: (dollar in thousands) March 31, Additions Reductions/ Fully December 31, Core deposit intangibles $ 10,120 $ 2,046 — — $ 8,074 Accumulated amortization (2,479 ) — $ (299 ) — (2,180 ) Core deposit intangibles, net $ 7,641 $ 2,046 $ (299 ) — $ 5,894 The Company recorded additions to its CDI of $2,046,000 in conjunction with the acquisition of three branch offices from Bank of America on March 18, 2016, $6,614,000 in conjunction with the North Valley Bancorp acquisition on October 3, 2014, $898,000 in conjunction with the Citizens acquisition on September 23, 2011, and $562,000 in conjunction with the Granite acquisition on May 28, 2010. The following table summarizes the Company’s estimated core deposit intangible amortization (dollars in thousands): Years Ended Estimated Core Deposit 2016 $ 1,377 2017 1,389 2018 1,324 2019 1,228 2020 1,228 Thereafter $ 1,095

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Mortgage Servicing Rights	Note 10 - Mortgage Servicing Rights The following tables summarize the activity in, and the main assumptions we used to determine the fair value of mortgage servicing rights (“MSRs”) for the periods indicated (dollars in thousands): Three months ended March 31, 2016 2015 Balance at beginning of period $ 7,618 $ 7,378 Additions 220 185 Change in fair value (698 ) (506 ) Balance at end of period $ 7,140 $ 7,057 Contractually specified servicing fees, late fees and ancillary fees earned $ 517 $ 534 Balance of loans serviced at: Beginning of period $ 817,917 $ 840,288 End of period $ 813,800 $ 832,143 Weighted-average prepayment speed (CPR) 11.6 % 13.0 % Weighted-average discount rate 10.0 % 10.0 % The changes in fair value of MSRs that occurred during the three months ended March 31, 2016 and 2015 were mainly due to changes in principal balances and changes in estimate life of the MSRs.

Indemnification Asset

Indemnification Asset	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Indemnification Asset	Note 11 - Indemnification Asset A summary of the activity in the balance of indemnification asset follows (in thousands): Three months ended March 31, 2016 2015 Beginning balance $ (521 ) $ (349 ) Effect of actual and estimated future covered losses and recoveries (111 ) (62 ) Reimbursable (revenue) expenses incurred (4 ) (3 ) Payments made to (received from) FDIC 29 (19 ) Ending balance $ (607 ) $ (433 ) Amount of indemnification asset (liability) recorded in other assets $ 11 $ 114 Amount of indemnification asset (liability) recorded in other liabilities (618 ) (547 ) Ending balance $ (607 ) $ (433 )

Other Assets

Other Assets	3 Months Ended
	Mar. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets	Note 12 – Other Assets Other assets were comprised of (in thousands): March 31, December 31, Deferred tax asset, net $ 33,803 $ 36,440 Prepaid expense 3,130 3,062 Software 1,892 1,290 Advanced compensation 571 673 Capital Trusts 1,697 1,696 Investment in Low Housing Tax Credit Funds 14,138 4,223 Miscellaneous other assets 2,489 1,207 Total other assets $ 57,720 $ 48,591

Deposits

Deposits	3 Months Ended
	Mar. 31, 2016
Banking and Thrift [Abstract]
Deposits	Note 13 - Deposits A summary of the balances of deposits follows (in thousands): March 31 December 31, Noninterest-bearing demand $ 1,178,001 $ 1,155,695 Interest-bearing demand 884,638 853,961 Savings 1,368,644 1,281,540 Time certificates, $250,000 and over 77,184 75,897 Other time certificates 276,573 264,173 Total deposits $ 3,785,040 $ 3,631,266 Certificate of deposit balances of $50,000,000 from the State of California were included in time certificates, $250,000 and over, at each of March 31, 2016 and December 31, 2015. The Bank participates in a deposit program offered by the State of California whereby the State may make deposits at the Bank’s request subject to collateral and credit worthiness constraints. The negotiated rates on these State deposits are generally more favorable than other wholesale funding sources available to the Bank. Overdrawn deposit balances of $1,164,000 and $796,000 were classified as consumer loans at March 31, 2016 and December 31, 2015, respectively.

Reserve for Unfunded Commitment

Reserve for Unfunded Commitments	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Reserve for Unfunded Commitments	Note 14 – Reserve for Unfunded Commitments The following tables summarize the activity in reserve for unfunded commitments for the periods indicated (dollars in thousands): Three months ended March 31, 2016 2015 Balance at beginning of period $ 2,475 $ 2,145 Provision for losses – Unfunded commitments — (130 ) Balance at end of period $ 2,475 $ 2,015

Other Liabilities

Other Liabilities	3 Months Ended
	Mar. 31, 2016
Other Liabilities Disclosure [Abstract]
Other Liabilities	Note 15 – Other Liabilities Other liabilities were comprised of (in thousands): March 31, December 31, Deferred compensation $ 6,844 $ 6,725 Pension liability 26,557 26,182 Joint beneficiary agreements 2,581 2,529 Low income housing tax credit fund commitments 13,128 3,330 Accrued salaries and benefits expense 3,133 3,851 Taxes Payable 5,494 — Loan escrow and servicing payable 947 2,037 Deferred revenue 1,067 1,082 Unsettled investment security purchases — 17,072 Branch purchase settlement due 4,242 — Miscellaneous other liabilities 4,071 2,485 Total other liabilities $ 68,064 $ 65,293

Other Borrowings

Other Borrowings	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Other Borrowings	Note 16 - Other Borrowings A summary of the balances of other borrowings follows: March 31, December 31, (in thousands) Other collateralized borrowings, fixed rate, as of March 31, 2016 of 0.05%, payable on April 1, 2016 $ 18,671 $ 12,328 Total other borrowings $ 18,671 $ 12,328 The Company did not enter into any repurchase agreements during the three months ended March 31, 2016 or the year ended December 31, 2015. The Company had $18,671,000 and $12,328,000 of other collateralized borrowings at March 31, 2016 and December 31, 2015, respectively. Other collateralized borrowings are generally overnight maturity borrowings from non-financial institutions that are collateralized by securities owned by the Company. As of March 31, 2016, the Company has pledged as collateral and sold under agreements to repurchase investment securities with fair value of $23,509,000 under these other collateralized borrowings. The Company maintains a collateralized line of credit with the Federal Home Loan Bank of San Francisco. Based on the FHLB stock requirements at March 31, 2016, this line provided for maximum borrowings of $1,209,208,000 of which none was outstanding, leaving $1,209,208,000 available. As of March 31, 2016, the Company has designated investment securities with fair value of $88,251,000 and loans totaling $1,732,273,000 as potential collateral under this collateralized line of credit with the FHLB. The Company maintains a collateralized line of credit with the San Francisco Federal Reserve Bank. As of March 31, 2016, this line provided for maximum borrowings of $128,015,000 of which none was outstanding, leaving $128,015,000 available. As of March 31, 2016, the Company has designated investment securities with fair value of $216,000 and loans totaling $219,438,000 as potential collateral under this collateralized line of credit with the San Francisco Federal Reserve Bank. The Company had available unused correspondent banking lines of credit from commercial banks totaling $15,000,000 for federal funds transactions at March 31, 2016.

Junior Subordinated Debt

Junior Subordinated Debt	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Junior Subordinated Debt	Note 17 – Junior Subordinated Debt On July 31, 2003, the Company formed a subsidiary business trust, TriCo Capital Trust I, to issue trust preferred securities. Concurrently with the issuance of the trust preferred securities, the trust issued 619 shares of common stock to the Company for $1,000 per share or an aggregate of $619,000. In addition, the Company issued a junior subordinated debenture to the trust in the amount of $20,619,000. The terms of the junior subordinated debenture are materially consistent with the terms of the trust preferred securities issued by TriCo Capital Trust I. Also on July 31, 2003, TriCo Capital Trust I completed an offering of 20,000 shares of cumulative trust preferred securities for cash in an aggregate amount of $20,000,000. The trust preferred securities are mandatorily redeemable upon maturity on October 7, 2033 with an interest rate that resets quarterly at three-month LIBOR plus 3.05%. TriCo Capital Trust I has the right to redeem the trust preferred securities on or after October 7, 2008. The trust preferred securities were issued through an underwriting syndicate to which the Company paid underwriting fees of $7.50 per trust preferred security or an aggregate of $150,000. The net proceeds of $19,850,000 were used to finance the opening of new branches, improve bank services and technology, repurchase shares of the Company’s common stock under its repurchase plan and increase the Company’s capital. On June 22, 2004, the Company formed a second subsidiary business trust, TriCo Capital Trust II, to issue trust preferred securities. Concurrently with the issuance of the trust preferred securities, the trust issued 619 shares of common stock to the Company for $1,000 per share or an aggregate of $619,000. In addition, the Company issued a junior subordinated debenture to the trust in the amount of $20,619,000. The terms of the junior subordinated debenture are materially consistent with the terms of the trust preferred securities issued by TriCo Capital Trust II. Also on June 22, 2004, TriCo Capital Trust II completed an offering of 20,000 shares of cumulative trust preferred securities for cash in an aggregate amount of $20,000,000. The trust preferred securities are mandatorily redeemable upon maturity on July 23, 2034 with an interest rate that resets quarterly at three-month LIBOR plus 2.55%. TriCo Capital Trust II has the right to redeem the trust preferred securities on or after July 23, 2009. The trust preferred securities were issued through an underwriting syndicate to which the Company paid underwriting fees of $2.50 per trust preferred security or an aggregate of $50,000. The net proceeds of $19,950,000 were used to finance the opening of new branches, improve bank services and technology, repurchase shares of the Company’s common stock under its repurchase plan and increase the Company’s capital. As a result of the Company’s acquisition of North Valley Bancorp on October 3, 2014, the Company assumed the junior subordinated debentures issued by North Valley Bancorp to North Valley Capital Trusts II, III & IV with face amounts of $6,186,000, $5,155,000 and $10,310,000, respectively. Also, as a result of the North Valley Bancorp acquisition, the Company acquired common stock interests in North Valley Capital Trusts II, III and IV with face valley of $186,000, $155,000, and $310,000, respectively. At the acquisition date of October 3, 2014, the junior subordinated debentures associated with North Valley Capital Trust II, III and IV were recorded on the Company’s books at their fair values of $5,006,000, $3,918,000, and $6,063,000, respectively. The related fair value discounts to face value of these debentures will be amortized over the remaining time to maturity for each of these debentures using the effective interest method. Similar, and proportional, discounts were applied to the acquired common stock interest in North Valley Capital Trusts II, III and IV, and these discounts will be proportionally amortized over the remaining time to maturity for each related debenture. TriCo Capital Trusts I and II, and North Valley Capital Trusts II, III and IV are collectively referred to as the Capital Trusts. The recorded book values of the junior subordinated debentures issued by the Capital Trusts are reflected as junior subordinated debt in the Company’s consolidated balance sheets. The common stock issued by the Capital Trusts and owned by the Company is recorded in other assets in the Company’s consolidated balance sheets. The recorded book value of the debentures issued by the Capital Trusts, less the recorded book value of the common stock of the Capital Trusts owned by the Company, continues to qualify as Tier 1 or Tier 2 capital under interim guidance issued by the Board of Governors of the Federal Reserve System. The following table summarizes the terms and recorded balance of each subordinated debenture as of the date indicated (dollars in thousands): Coupon Rate As of March 31, 2016 December 31, 2015 Subordinated Debt Series Maturity Face (Variable) Current Recorded Recorded TriCo Cap Trust I 10/7/2033 $ 20,619 3.05 % 3.67 % $ 20,619 $ 20,619 TriCo Cap Trust II 7/23/2034 20,619 2.55 % 3.17 % 20,619 20,619 North Valley Trust II 4/24/2033 6,186 3.25 % 3.87 % 5,065 5,055 North Valley Trust III 4/24/2034 5,155 2.80 % 3.42 % 3,976 3,966 North Valley Trust IV 3/15/2036 10,310 1.33 % 1.96 % 6,240 6,211 $ 62,889 $ 56,519 $ 56,470 During the three months ended March 31, 2016, the balance of Junior Subordinated Debt increased $49,000 to $56,519,000 due to purchase fair value discount amortization.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18 - Commitments and Contingencies Restricted Cash Balances Lease Commitments At December 31, 2015, future minimum commitments under non-cancelable operating leases with initial or remaining terms of one year or more are as follows: Operating (in thousands) 2016 $ 3,067 2017 2,400 2018 1,755 2019 1,211 2020 2,382 Thereafter 659 Future minimum lease payments $ 11,474 Rent expense under operating leases was $981,000 and $959,000 during the three months ended March 31, 2016 and 2015, respectively. Rent expense was offset by rent income of $58,000 and $48,000 during the three months ended March 31, 2016 and 2015, respectively. Financial Instruments with Off-Balance-Sheet Risk The Company’s exposure to loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit written is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The Company’s exposure to loss in the event of nonperformance by the other party to the financial instrument for deposit account overdraft privilege is represented by the overdraft privilege amount disclosed to the deposit account holder. The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) March 31, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 200,549 $ 196,399 Consumer loans 398,860 394,278 Real estate mortgage loans 51,723 42,793 Real estate construction loans 59,574 71,846 Standby letters of credit 8,152 8,330 Deposit account overdraft privilege 96,997 94,473 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 of one year or less or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on Management’s credit evaluation of the customer. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, residential properties, and income-producing commercial properties. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support private borrowing arrangements. Most standby letters of credit are issued for one year or less. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. Collateral requirements vary, but in general follow the requirements for other loan facilities. Deposit account overdraft privilege amount represents the unused overdraft privilege balance available to the Company’s deposit account holders who have deposit accounts covered by an overdraft privilege. The Company has established an overdraft privilege for certain of its deposit account products whereby all holders of such accounts who bring their accounts to a positive balance at least once every thirty days receive the overdraft privilege. The overdraft privilege allows depositors to overdraft their deposit account up to a predetermined level. The predetermined overdraft limit is set by the Company based on account type. Legal Proceedings On September 15, 2014, a former Personal Banker at one of the Bank’s in-store branches filed a Class Action Complaint against the Bank in Butte County Superior Court, alleging causes of action related to the observance of meal and rest periods and seeking to represent a class of current and former hourly-paid or non-exempt personal bankers, or employees with the same or similar job duties, employed by Defendants within the State of California during the preceding four years. On or about June 25, 2015, Plaintiff filed an Amended Complaint expanding the class definition to all current and formerly hourly-paid or non-exempt branch employees employed by Defendant’s within the State of California at any time during the period from September 15, 2010 to final judgment. The Bank has responded to the First Amended Complaint, denying the charges, and the parties have engaged in written discovery. The parties are in the process of scheduling the matter for mediation in the July, 2016 time period. On January 20, 2015, a current Personal Banker at one of the Bank’s in-store branches filed a First Amended Complaint against Tri Counties Bank and TriCo Bancshares, dba Tri Counties Bank, in Sacramento County Superior Court, alleging causes of action related to wage statement violations. Plaintiff seeks to represent a class of current and former exempt and non-exempt employees who worked for the Bank during the time period beginning October 18, 2013 through the date of the filing of this action. The Company and the Bank have responded to the First Amended Complaint, deny the charges, and has engaged in written discovery with Plaintiff. The parties intend to mediate this matter in a joint mediation with the above matter this summer. Neither the Company nor its subsidiaries, are party to any other material pending legal proceeding, nor is their property the subject of any other material pending legal proceeding, except routine legal proceedings arising in the ordinary course of their business. None of these proceedings is expected to have a material adverse impact upon the Company’s business, consolidated financial position or results of operations. Other Commitments and Contingencies Mortgage loans sold to investors may be sold with servicing rights retained, with only the standard legal representations and warranties regarding recourse to the Bank. Management believes that any liabilities that may result from such recourse provisions are not significant.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Shareholders' Equity	Note 19 – Shareholders’ Equity Dividends Paid The Bank paid to the Company cash dividends in the aggregate amounts of $3,680,000 and $2,120,000 during the three months ended March 31, 2016 and 2015 respectively. The Bank is regulated by the Federal Deposit Insurance Corporation (FDIC) and the State of California Department of Business Oversight. Absent approval from the Commissioner of the Department of Business Oversight, California banking laws generally limit the Bank’s ability to pay dividends to the lesser of (1) retained earnings or (2) net income for the last three fiscal years, less cash distributions paid during such period. Under this law, at December 31, 2015, the Bank may pay cash dividends of $73,297,000. Stock Repurchase Plan On August 21, 2007, the Board of Directors adopted a plan to repurchase, as conditions warrant, up to 500,000 shares of the Company’s common stock on the open market. The timing of purchases and the exact number of shares to be purchased will depend on market conditions. The 500,000 shares authorized for repurchase under this stock repurchase plan represented approximately 3.2% of the Company’s 15,814,662 outstanding common shares as of August 21, 2007. This stock repurchase plan has no expiration date. As of March 31, 2016, the Company had repurchased 166,600 shares under this plan. Stock Repurchased Under Equity Compensation Plans During the three months ended March 31, 2016 and 2015, employees tendered 0 and 21,461 shares, respectively, of the Company’s common stock with market value of $0, and $509,000, respectively, in lieu of cash to exercise options to purchase shares of the Company’s stock and to pay income taxes related to such exercises as permitted by the Company’s shareholder-approved equity compensation plans. The tendered shares were retired. The market value of tendered shares is the last market trade price at closing on the day an option is exercised. Stock repurchased under equity incentive plans are not included in the total of stock repurchased under the stock repurchase plan announced on August 21, 2007.

Stock Options and Other Equity-

Stock Options and Other Equity-Based Incentive Instruments	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options and Other Equity-Based Incentive Instruments	Note 20 - Stock Options and Other Equity-Based Incentive Instruments In March 2009, the Company’s Board of Directors adopted the TriCo Bancshares 2009 Equity Incentive Plan (2009 Plan) covering officers, employees, directors of, and consultants to, the Company. The 2009 Plan was approved by the Company’s shareholders in May 2009. The 2009 Plan allows for the granting of the following types of “stock awards” (Awards): incentive stock options, nonstatutory stock options, performance awards, restricted stock, restricted stock unit (RSU) awards and stock appreciation rights. RSUs that vest based solely on the grantee remaining in the service of the Company for a certain amount of time, are referred to as “service condition vesting RSUs”. RSUs that vest based on the grantee remaining in the service of the Company for a certain amount of time and a market condition such as the total return of the Company’s common stock versus the total return of an index of bank stocks, are referred to as “market plus service condition vesting RSUs”. In May 2013, the Company’s shareholders approved an amendment to the 2009 Plan increasing the maximum aggregate number of shares of TriCo’s common stock which may be issued pursuant to or subject to Awards from 650,000 to 1,650,000. The number of shares available for issuance under the 2009 Plan is reduced by: (i) one share for each share of common stock issued pursuant to a stock option or a Stock Appreciation Right and (ii) two shares for each share of common stock issued pursuant to a Performance Award, a Restricted Stock Award or a Restricted Stock Unit Award. When Awards made under the 2009 Plan expire or are forfeited or cancelled, the underlying shares will become available for future Awards under the 2009 Plan. To the extent that a share of common stock pursuant to an Award that counted as two shares against the number of shares again becomes available for issuance under the 2009 Plan, the number of shares of common stock available for issuance under the 2009 Plan shall increase by two shares. Shares awarded and delivered under the 2009 Plan may be authorized but unissued, or reacquired shares. As of March 31, 2016, 670,000 options for the purchase of common shares, and 79,856 restricted stock units were outstanding, and 731,723 shares remain available for issuance, under the 2009 Plan. In May 2001, the Company adopted the TriCo Bancshares 2001 Stock Option Plan (2001 Plan) covering officers, employees, directors of, and consultants to, the Company. Under the 2001 Plan, the option exercise price cannot be less than the fair market value of the Common Stock at the date of grant except in the case of substitute options. Options for the 2001 Plan expire on the tenth anniversary of the grant date. Vesting schedules under the 2001 Plan are determined individually for each grant. As of March 31, 2016, 268,350 options for the purchase of common shares were outstanding under the 2001 Plan. As of May 2009, as a result of the shareholder approval of the 2009 Plan, no new options may be granted under the 2001 Plan. Stock option activity during the three months ended March 31, 2016 is summarized in the following table: Number Option Price per Share Weighted Weighted Outstanding at December 31, 2015 948,350 $ 12.63 to $ 25.91 $ 17.94 Options granted — — to — — — Options exercised (10,000 ) $ 17.25 to $ 17.25 $ 17.25 Options forfeited — — to — — Outstanding at March 31, 2016 938,350 $ 12.63 to $ 25.91 $ 17.95 The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of March 31, 2016: Currently Currently Not Total Number of options 702,150 236,200 938,350 Weighted average exercise price $ 18.10 $ 17.48 $ 17.95 Intrinsic value (in thousands) $ 5,082 $ 1,852 $ 6,934 Weighted average remaining contractual term (yrs.) 3.9 6.4 4.5 The 236,200 options that are currently not exercisable as of March 31, 2016 are expected to vest, on a weighted-average basis, over the next 1.4 years, and the Company is expected to recognize $894,000 of pre-tax compensation costs related to these options as they vest. The Company did not modify any option grants during 2015 or the three months ended March 31, 2016. Restricted stock unit (RSU) activity is summarized in the following table for the dates indicated: Service Condition Vesting RSUs Market Plus Service Condition Vesting RSUs Number Weighted Date of Grant Number of RSUs Weighted Average Fair Value on Date of Grant Outstanding at December 31, 2015 46,286 32,097 RSUs granted 1,192 $ 25.50 — — RSUs added through dividend credits 281 — RSUs released — — RSUs forfeited/expired — — Outstanding at March 31, 2016 47,759 32,097 The 47,759 of service condition vesting RSUs outstanding as of March 31, 2016 include a feature whereby each RSU outstanding is credited with a dividend amount equal to any common stock cash dividend declared and paid, and the credited amount is divided by the closing price of the Company’s stock on the dividend payable date to arrive at an additional amount of RSUs outstanding under the original grant. The 47,759 of service condition vesting RSUs outstanding as of March 31, 2016 are expected to vest, and be released, on a weighted-average basis, over the next 1.3 years. The Company is expected to recognize $640,000 of pre-tax compensation costs related to these service condition vesting RSUs between March 31, 2016 and their vesting dates. During the three months ended March 31, 2016, the Company did not modify any service condition vesting RSUs. During 2015 the Company did not modify any service condition vesting RSUs. The 32,097 of market plus service condition vesting RSUs outstanding as of March 31, 2016 are expected to vest, and be released, on a weighted-average basis, over the next 1.8 years. The Company is expected to recognize $396,000 of pre-tax compensation costs related to these RSUs between March 31, 2016 and their vesting dates. As of March 31, 2016, the number of market plus service condition vesting RSUs outstanding that will actually vest, and be released, may be reduced to zero or increased to 48,145 depending on the total return of the Company’s common stock versus the total return of an index of bank stocks from the grant date to the vesting date. The Company did not modify any market plus service condition vesting RSUs during 2015 or 2014.

Noninterest Income and Expense

Noninterest Income and Expense	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Noninterest Income and Expense	Note 21 - Noninterest Income and Expense The components of other noninterest income were as follows (in thousands): Three months ended March 31, 2016 2015 Service charges on deposit accounts $ 3,365 $ 3,600 ATM and interchange fees 3,393 3,002 Other service fees 728 714 Mortgage banking service fees 517 534 Change in value of mortgage servicing rights (698 ) (506 ) Total service charges and fees 7,305 7,344 Gain on sale of loans 803 622 Commissions on sale of non-deposit investment products 532 965 Increase in cash value of life insurance 696 675 Change in indemnification asset (115 ) (65 ) Gain on sale of foreclosed assets 92 311 Sale of customer checks 119 128 Lease brokerage income 195 137 Loss on disposal of fixed assets (31 ) (84 ) Other 194 147 Total other noninterest income 2,485 2,836 Total noninterest income $ 9,790 $ 10,180 Mortgage loan servicing fees, net of change in fair value of mortgage loan servicing rights, totaling $(181,000) and $28,000 were recorded in service charges and fees noninterest income for the three months ended March 31, 2016 and 2015, respectively. The components of noninterest expense were as follows (in thousands): Three months ended March 31, 2016 2015 Base salaries, net of deferred loan origination costs $ 12,708 $ 11,744 Incentive compensation 1,739 1,596 Benefits and other compensation costs 4,818 4,760 Total salaries and benefits expense 19,265 18,100 Occupancy 2,308 2,417 Equipment 1,386 1,414 Data processing and software 1,843 1,952 ATM network charges 1,006 770 Telecommunications 685 886 Postage 463 312 Courier service 271 248 Advertising 895 808 Assessments 632 651 Operational losses 164 124 Professional fees 809 1,119 Foreclosed assets expense 46 98 (Reversal of) provision for foreclosed asset losses (11 ) 67 Change in reserve for unfunded commitments — (130 ) Intangible amortization 299 289 Merger and acquisition expense 622 586 Other miscellaneous expense 3,068 2,571 Total other noninterest expense 14,486 14,182 Total noninterest expense $ 33,751 $ 32,282 Merger and acquisition expense: Base salaries (outside temporary help) $ 187 — Data processing and software — $ 108 Professional fees 180 120 Advertising and marketing 114 — Other miscellaneous expense 141 358 Total merger expense $ 622 $ 586

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 22 - Income Taxes The provisions for income taxes applicable to income before taxes differ from amounts computed by applying the statutory Federal income tax rates to income before taxes. The effective tax rate and the statutory federal income tax rate are reconciled for the periods indicated as follows: Three months ended March 31, 2016 2015 Federal statutory income tax rate 35.0 % 35.0 % State income taxes, net of federal tax benefit 6.3 6.9 Tax-exempt interest on municipal obligations (1.8 ) (0.4 ) Increase in cash value of insurance policies (1.4 ) (1.7 ) Other — 0.8 Effective Tax Rate 38.1 % 40.6 %

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Note 23 – Earnings Per Share Basic earnings per share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustments to income that would result from assumed issuance. Potential common shares that may be issued by the Company relate solely from outstanding stock options, and are determined using the treasury stock method. Earnings per share have been computed based on the following: Three months ended (In thousands) 2016 2015 Net income $ 10,674 $ 8,336 Average number of common shares outstanding 22,783 22,727 Effect of dilutive stock options and restricted stock 263 223 Average number of common shares outstanding used to calculate diluted earnings per share 23,046 22,950 Options excluded from diluted earnings per share because the effect of these options was antidilutive 23 23 Restricted stock excluded from diluted earnings per share because the effect of these restricted stock was antidilutive — —

Comprehensive Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Comprehensive Income	Note 24 – Comprehensive Income Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the equity section of the balance sheet, such items, along with net income, are components of comprehensive income. The components of other comprehensive income and related tax effects are as follows: Three Months Ended March 31, 2016 2015 (in thousands) Unrealized holding gains (losses) on available for sale securities before reclassifications $ 6,125 $ 15 Amounts reclassified out of accumulated other comprehensive income- — — Unrealized holding gains (losses) on available for sale securities after reclassifications 6,125 15 Tax effect (2,575 ) (6 ) Unrealized holding gains (losses) on available for sale securities, net of tax 3,550 9 Change in unfunded status of the supplemental retirement plans before reclassifications — — Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost — (14 ) Amortization of actuarial losses — 206 Total amounts reclassified out of accumulated other comprehensive income — 192 Change in unfunded status of the supplemental retirement plans after reclassifications — 192 Tax effect — (81 ) Change in unfunded status of the supplemental retirement plans, net of tax — 111 Change in joint beneficiary agreement liability before reclassifications — — Amounts reclassified out of accumulated other comprehensive income — — Change in joint beneficiary agreement liability after reclassifications — — Tax effect — — Change in joint beneficiary agreement liability, net of tax — — Total other comprehensive gain (loss) $ 3,550 $ 120 The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: March 31, December 31, 2016 2015 (in thousands) Net unrealized gains on available for sale securities $ 8,270 $ 2,145 Tax effect (3,477 ) (902 ) Unrealized holding gains on available for sale securities, net of tax 4,793 1,243 Unfunded status of the supplemental retirement plans (5,735 ) (5,735 ) Tax effect 2,411 2,411 Unfunded status of the supplemental retirement plans, net of tax (3,324 ) (3,324 ) Joint beneficiary agreement liability 303 303 Tax effect — — Joint beneficiary agreement liability, net of tax 303 303 Accumulated other comprehensive loss $ 1,772 $ (1,778 )

Retirement Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Retirement Plans	Note 25 - Retirement Plans 401(k) Plan The Company sponsors a 401(k) Plan whereby substantially all employees age 21 and over with 90 days of service may participate. Participants may contribute a portion of their compensation subject to certain limits based on federal tax laws. Prior to July 1, 2015, the Company did not contribute to the 401(k) Plan. Effective July 1, 2015, the Company initiated a discretionary matching contribution equal to 50% of participant’s elective deferrals each quarter, up to 4% of eligible compensation. The Company recorded $160,000, and $0 of salaries & benefits expense attributable to the 401(k) Plan matching contributions during the three months ended March 31, 2016 and 2015, respectively. The Company made contributions to the 401(k) Plan of $293,000 and $0 during the three months ended March 31, 2016 and 2015, respectively. Employee Stock Ownership Plan Substantially all employees with at least one year of service are covered by a discretionary employee stock ownership plan (ESOP). Contributions are made to the plan at the discretion of the Board of Directors. Contributions to the plan totaling $441,000 and $368,000 during the three months ended March 31, 2016 and 2015, respectively, are included in salary expense. Company shares owned by the ESOP are paid dividends and included in the calculation of earnings per share exactly as other common shares outstanding. Deferred Compensation Plans The Company has deferred compensation plans for certain directors and key executives, which allow certain directors and key executives designated by the Board of Directors of the Company to defer a portion of their compensation. The Company has purchased insurance on the lives of the participants and intends to hold these policies until death as a cost recovery of the Company’s deferred compensation obligations of $6,844,000 and $6,725,000 at March 31, 2016 and December 31, 2015, respectively. Earnings credits on deferred balances totaling $126,000 and $149,000 during the three months ended March 31, 2016 and 2015, respectively, are included in noninterest expense. Supplemental Retirement Plans The Company has supplemental retirement plans for current and former directors and key executives. These plans are non-qualified defined benefit plans and are unsecured and unfunded. The Company has purchased insurance on the lives of the participants and intends (but is not required) to use the cash values of these policies to pay the retirement obligations. The following table sets forth the net periodic benefit cost recognized for the plans: Three months ended March 31, 2016 2015 (In thousands) Net pension cost included the following components: Service cost-benefits earned during the period $ 260 $ 256 Interest cost on projected benefit obligation 256 239 Amortization of net obligation at transition — — Amortization of prior service cost (10 ) (14 ) Recognized net actuarial loss 138 206 Net periodic pension cost $ 644 $ 687 During the three months ended March 31, 2016 and 2015, the Company contributed and paid out as benefits $269,000 and $219,000, respectively, to participants under the plans. For the year ending December 31, 2016, the Company expects to contribute and pay out as benefits $1,104,000 to participants under the plans.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Note 26 - Related Party Transactions Certain directors, officers, and companies with which they are associated were customers of, and had banking transactions with, the Company or the Bank in the ordinary course of business. The following table summarizes the activity in these loans for periods indicated (in thousands): Balance December 31, 2014 $ 3,132 Advances/new loans 3,098 Removed/payments (2,029 ) Balance December 31, 2015 $ 4,201 Advances/new loans 71 Removed/payments (648 ) Balance March 31, 2016 $ 3,624 Director Chrysler is a principal owner and CEO of Modern Building Inc. Modern Building Inc. provided construction services to the Company related to new and existing Bank facilities for aggregate payments of $589,000 during the three months ended March 31, 2016 and $1,030,000 during the year ended December 31, 2015.

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement	Note 27 - Fair Value Measurement The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, income approach, and/or the cost approach. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability including assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset and the risk of nonperformance. Securities available-for-sale and mortgage servicing rights are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such as loans held for sale, loans held for investment and certain other assets. These nonrecurring fair value adjustments typically involve application of lower of cost or market accounting or impairment write-downs of individual assets. The Company groups assets and liabilities at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observable nature of the assumptions used to determine fair value. These levels are: Level 1 - Valuation is based upon quoted prices for identical instruments traded in active markets. Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 - Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. Securities available for sale Loans held for sale Impaired originated and PNCI loans Foreclosed assets Mortgage servicing rights The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at March 31, 2016 Total Level 1 Level 2 Level 3 Securities available for sale: Obligations of U.S. government corporations and agencies $ 360,253 — $ 360,253 — Obligations of states and political subdivisions 114,174 — 114,174 — Corporate debt securities — — — — Marketable equity services 3,027 $ 3,027 — — Mortgage servicing rights 7,140 — — $ 7,140 Total assets measured at fair value $ 484,594 $ 3,027 $ 474,427 $ 7,140 Fair value at December 31, 2015 Total Level 1 Level 2 Level 3 Securities available-for-sale: Obligations of U.S. government corporations and agencies $ 313,682 — $ 313,682 — Obligations of states and political subdivisions 88,218 — 88,218 — Corporate debt securities — — — — Marketable equity securities 2,985 $ 2,985 — — Mortgage servicing rights 7,618 — — $ 7,618 Total assets measured at fair value $ 412,503 $ 2,985 $ 401,900 $ 7,618 Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally corresponds with the Company’s quarterly valuation process. There were no transfers between any levels during the three months ended March 31, 2016 or the year ended December 31, 2015. The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Transfers Change Beginning into (out of) Included Ending Three months ended March 31, Balance Level 3 in Earnings Issuances Balance 2016: Mortgage servicing rights $ 7,618 — $ (698 ) $ 220 $ 7,140 2015: Mortgage servicing rights $ 7,378 — $ (506 ) $ 185 $ 7,057 The Company’s method for determining the fair value of mortgage servicing rights is described in Note 1. The key unobservable inputs used in determining the fair value of mortgage servicing rights are mortgage prepayment speeds and the discount rate used to discount cash projected cash flows. Generally, any significant increases in the mortgage prepayment speed and discount rate utilized in the fair value measurement of the mortgage servicing rights will result in a negative fair value adjustments (and decrease in the fair value measurement). Conversely, a decrease in the mortgage prepayment speed and discount rate will result in a positive fair value adjustment (and increase in the fair value measurement). Note 10 contains additional information regarding mortgage servicing rights. The following table presents quantitative information about recurring Level 3 fair value measurements at March 31, 2016: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Mortgage Servicing Rights $ 7,140 Discounted cash flow Constant prepayment rate 6.4%-20.6%, 11.6% Discount rate 10.0%-12.0%, 10.0% The following table presents quantitative information about recurring Level 3 fair value measurements at December 31, 2015: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Mortgage Servicing Rights $ 7,618 Discounted cash flow Constant prepayment rate 6.3%-20.5%, 9.8% Discount rate 10.0%-12.0%, 10.0% The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): Total Gains Three months ended March 31, 2016 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 4,355 — — $ 4,355 $ (828 ) Foreclosed assets 1,383 — — 1,383 — Total assets measured at fair value $ 5,738 — — $ 5,738 $ (828 ) Total Gains Year ended December 31, 2015 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 4,649 — — $ 4,649 $ (660 ) Foreclosed assets 1,540 1,540 (102 ) Total assets measured at fair value $ 6,189 — — $ 6,189 $ (762 ) Total Gains Three months ended March 31, 2015 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 3,690 — — $ 3,690 $ (181 ) Foreclosed assets 2,384 — — 2,384 (64 ) Total assets measured at fair value $ 6,074 — — $ 6,074 $ (245 ) The impaired Originated and PNCI loan amount above represents impaired, collateral dependent loans that have been adjusted to fair value. When we identify a collateral dependent loan as impaired, we measure the impairment using the current fair value of the collateral, less selling costs. Depending on the characteristics of a loan, the fair value of collateral is generally estimated by obtaining external appraisals. If we determine that the value of the impaired loan is less than the recorded investment in the loan, we recognize this impairment and adjust the carrying value of the loan to fair value through the allowance for loan and lease losses. The loss represents charge-offs or impairments on collateral dependent loans for fair value adjustments based on the fair value of collateral. The carrying value of loans fully charged-off is zero. The foreclosed assets amount above represents impaired real estate that has been adjusted to fair value. Foreclosed assets represent real estate which the Bank has taken control of in partial or full satisfaction of loans. At the time of foreclosure, other real estate owned is recorded at the lower of the carrying amount of the loan or fair value less costs to sell, which becomes the property’s new basis. Any write-downs based on the asset’s fair value at the date of acquisition are charged to the allowance for loan and lease losses. After foreclosure, management periodically performs valuations such that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell. Fair value adjustments on other real estate owned are recognized within net loss on real estate owned. The loss represents impairments on non-covered other real estate owned for fair value adjustments based on the fair value of the real estate. The Company’s property appraisals are primarily based on the sales comparison approach and income approach methodologies, which consider recent sales of comparable properties, including their income generating characteristics, and then make adjustments to reflect the general assumptions that a market participant would make when analyzing the property for purchase. These adjustments may increase or decrease an appraised value and can vary significantly depending on the location, physical characteristics and income producing potential of each property. Additionally, the quality and volume of market information available at the time of the appraisal can vary from period to period and cause significant changes to the nature and magnitude of comparable sale adjustments. Given these variations, comparable sale adjustments are generally not a reliable indicator for how fair value will increase or decrease from period to period. Under certain circumstances, management discounts are applied based on specific characteristics of an individual property. The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at March 31, 2016: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Impaired Originated & PNCI loans $ 4,355 Sales comparison Adjustment for differences (0.0)%-(5.0)%, (5.0)% Income approach Capitalization rate 7.0%-7.0%, 7.0% Foreclosed assets (Land & construction) $ — Sales comparison Adjustment for differences N/A Foreclosed assets (residential (Residential real estate) $ 1,116 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (Commercial real estate) $ 267 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2015: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Impaired Originated & PNCI loans $ 4,649 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Income approach Capitalization rate 7.0%-8.0%, 7.25% Foreclosed assets (Land & construction) $ 96 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (residential (Residential real estate) $ 1,117 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (Commercial real estate) $ 267 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% In addition to the methods and assumptions used to estimate the fair value of each class of financial instrument noted above, the following methods and assumptions were used to estimate the fair value of other classes of financial instruments for which it is practical to estimate the fair value. Short-term Instruments Securities held to maturity Restricted Equity Securities Originated and PNCI loans PCI Loans FDIC Indemnification Asset - Deposit Liabilities Other Borrowings Junior Subordinated Debentures Commitments to Extend Credit and Standby Letters of Credit Fair values for financial instruments are management’s estimates of the values at which the instruments could be exchanged in a transaction between willing parties. These estimates are subjective and may vary significantly from amounts that would be realized in actual transactions. In addition, other significant assets are not considered financial assets including, any mortgage banking operations, deferred tax assets, and premises and equipment. Further, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on the fair value estimates and have not been considered in any of these estimates. The estimated fair values of financial instruments that are reported at amortized cost in the Corporation’s consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, were as follows (in thousands): March 31, 2016 December 31, 2015 Carrying Fair Carrying Fair Amount Value Amount Value Financial assets: Level 1 inputs: Cash and due from banks $ 76,702 $ 76,702 $ 94,305 $ 94,305 Cash at Federal Reserve and other banks 312,176 312,176 209,156 209,156 Level 2 inputs: Securities held to maturity 705,133 723,777 726,530 732,208 Restricted equity securities 16,956 N/A 16,596 N/A Loans held for sale 2,240 2,240 1,873 1,873 Level 3 inputs: Loans, net 2,505,159 2,590,603 2,486,926 2,555,297 Financial liabilities: Level 2 inputs: Deposits 3,785,040 3,784,443 3,631,266 3,630,129 Other borrowings 18,671 18,671 12,328 12,328 Level 3 inputs: Junior subordinated debt $ 56,519 45,837 $ 56,470 $ 44,527 Contract Fair Contract Fair Amount Value Amount Value Off-balance sheet: Level 3 inputs: Commitments $ 710,706 $ 7,107 $ 705,316 $ 7,053 Standby letters of credit $ 8,152 $ 82 $ 8,330 $ 83 Overdraft privilege commitments $ 96,997 $ 970 $ 94,473 $ 945

TriCo Bancshares Condensed Fina

TriCo Bancshares Condensed Financial Statements (Parent Only)	3 Months Ended
	Mar. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
TriCo Bancshares Condensed Financial Statements (Parent Only)	Note 28 - TriCo Bancshares Condensed Financial Statements (Parent Only) Condensed Balance Sheets March 31, December 31, 2016 2015 (In thousands) Assets Cash and Cash equivalents $ 2,686 $ 2,565 Investment in Tri Counties Bank 515,938 504,655 Other assets 1,702 1,714 Total assets $ 520,326 $ 508,934 Liabilities and shareholders’ equity Other liabilities $ 371 $ 348 Junior subordinated debt 56,519 56,470 Total liabilities 56,890 56,818 Shareholders’ equity: Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,785,173 and 22,775,173 shares, respectively 248,101 247,587 Retained earnings 213,563 206,307 Accumulated other comprehensive income (loss), net 1,772 (1,778 ) Total shareholders’ equity 463,436 452,116 Total liabilities and shareholders’ equity $ 520,326 $ 508,934 Condensed Statements of Income Three months ended March 31, 2016 2015 (In thousands) Interest expense $ 535 $ 482 Administration expense 149 153 Loss before equity in net income of Tri Counties Bank (684 ) (635 ) Equity in net income of Tri Counties Bank: Distributed 3,680 2,120 Under distributed 7,390 6,584 Income tax benefit 288 267 Net income $ 10,674 $ 8,336 Condensed Statements of Comprehensive Income Three months ended March 31, 2016 2015 (In thousands) Net income $ 10,674 $ 8,336 Other comprehensive loss, net of tax: Increase (decrease) in unrealized gains on available for sale securities arising during the period 3,550 9 Change in minimum pension liability — 111 Other comprehensive loss 3,550 120 Comprehensive income $ 14,224 $ 8,456 Condensed Statements of Cash Flows Three months ended March 31, 2016 2015 (In thousands) Operating activities: Net income $ 10,674 $ 8,336 Adjustments to reconcile net income to net cash provided by operating activities: Under distributed equity in earnings of Tri Counties Bank (7,390 ) (6,584 ) Equity compensation vesting expense 331 324 Stock option excess tax benefits (10 ) (18 ) Net change in other assets and liabilities (249 ) (124 ) Net cash provided by operating activities 3,356 1,934 Investing activities: None Financing activities: Stock option excess tax benefits 10 18 Issuance of common stock through option exercise 173 405 Repurchase of common stock — (27 ) Cash dividends paid — common (3,418 ) (2,515 ) Net cash used for financing activities (3,235 ) (2,119 ) Net change in cash and cash equivalents 121 (185 ) Cash and cash equivalents at beginning of year 2,565 2,229 Cash and cash equivalents at end of year $ 2,686 $ 2,044

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2016
Banking and Thrift [Abstract]
Regulatory Matters	Note 29 - Regulatory Matters The Company is subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. In July, 2013, the federal banking agencies approved final rules that substantially amend the regulatory risk-based capital rules applicable to TriCo and the Bank. The final rules implement the “Basel III” regulatory capital reforms and changes required by the Dodd-Frank Act. “Basel III” refers to two consultative documents released by the Basel Committee on Banking Supervision in December 2009, the rules text released in December 2010, and loss absorbency rules issued in January 2011, which include significant changes to bank capital, leverage and liquidity requirements. The rules include new risk-based capital and leverage ratios, which will be phased in from 2015 to 2019, and will refine the definition of what constitutes “capital” for purposes of calculating those ratios. The new minimum capital level requirements applicable to TriCo and the Bank as of January 1, 2015 under the final rules are: (i) a new common equity Tier 1 capital ratio of 4.5%; (ii) a Tier 1 capital ratio of 6% (increased from 4%); (iii) a total capital ratio of 8% (unchanged from previous rules); and (iv) a Tier 1 leverage ratio of 4% for all institutions. The final rules also establish a “capital conservation buffer” above the new regulatory minimum capital requirements, which must consist entirely of common equity Tier 1 capital. The capital conservation buffer will be phased-in over four years beginning on January 1, 2016, as follows: the maximum buffer will be 0.625% of risk-weighted assets for 2016, 1.25% for 2017, 1.875% for 2018, and 2.5% for 2019 and thereafter. This will result in the following minimum ratios beginning in 2019: (i) a common equity Tier 1 capital ratio of 7.0%, (ii) a Tier 1 capital ratio of 8.5%, and (iii) a total capital ratio of 10.5%. Under the final rules, institutions are subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if its capital level falls below the buffer amount. These limitations establish a maximum percentage of eligible retained income that could be utilized for such actions. Basel III provided discretion for regulators to impose an additional buffer, the “countercyclical buffer,” of up to 2.5% of common equity Tier 1 capital to take into account the macro-financial environment and periods of excessive credit growth. However, the final rules permit the countercyclical buffer to be applied only to “advanced approach banks” ( i.e., banks with $250 billion or more in total assets or $10 billion or more in total foreign exposures), which currently excludes TriCo and the Bank. The final rules also implement revisions and clarifications consistent with Basel III regarding the various components of Tier 1 capital, including common equity, unrealized gains and losses, as well as certain instruments that will no longer qualify as Tier 1 capital, some of which will be phased out over time. However, the final rules provide that small depository institution holding companies with less than $15 billion in total assets as of December 31, 2009 (such as TriCo) will be able to permanently include non-qualifying instruments that were issued and included in Tier 1 or Tier 2 capital prior to May 19, 2010 in additional Tier 1 or Tier 2 capital until they redeem such instruments or until the instruments mature. The final rules also allow banks other than advanced approach banks to make a one-time election to permanently exclude or include unrealized gains and losses on available for sale securities in accumulated other comprehensive income from Tier 1 capital. The Company has elected to exclude unrealized gains and losses on available for sale securities in accumulated other comprehensive income from Tier 1 capital. The final rules also contain revisions to the prompt corrective action framework, which is designed to place restrictions on insured depository institutions, including the Bank, if their capital levels begin to show signs of weakness. These revisions became effective on January 1, 2015. Under the prompt corrective action requirements, which are designed to complement the capital conservation buffer, insured depository institutions will be required to meet the following increased capital level requirements in order to qualify as “well capitalized:” (i) a new common equity Tier 1 capital ratio of 6.5%; (ii) a Tier 1 capital ratio of 8% (increased from 6%); (iii) a total capital ratio of 10% (unchanged from current rules); and (iv) a Tier 1 leverage ratio of 5% (increased from 4%). The final rules also set forth certain changes for the calculation of risk-weighted assets, which will be phased in beginning January 1, 2015. The standardized approach final rule utilizes an increased number of credit risk exposure categories and risk weights, and also addresses: (i) an alternative standard of creditworthiness consistent with Section 939A of the Dodd-Frank Act; (ii) revisions to recognition of credit risk mitigation; (iii) rules for risk weighting of equity exposures and past due loans; (iv) revised capital treatment for derivatives and repo-style transactions; and (v) disclosure requirements for top-tier banking organizations with $50 billion or more in total assets that are not subject to the “advance approach rules” that apply to banks with greater than $250 billion in consolidated assets. We believe that we were in compliance with the requirements applicable to us as set forth in the final rules as of January 1, 2015 and March 31, 2016. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1, and common equity Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets. Management believes, as of March 31, 2016, that the Company meets all capital adequacy requirements to which it is subject. The following tables present actual and required capital ratios as of March 31, 2016 and December 31, 2015 for the Company and the Bank under Basel III Capital Rules. The minimum capital amounts presented include the minimum required capital levels as of March 31, 2016 and December 31, 2015 based on the phased-in provisions of the Basel III Capital Rules and the minimum required capital levels as of January 1, 2019 when the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Minimum Capital Minimum Capital Required to be Required – Basel III Required – Basel III Considered Well Actual Phase-in Schedule Fully Phased In Capitalized Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of March 31, 2016: Total Capital (to Risk Weighted Assets): Consolidated $ 480,710 15.13 % $ 254,246 8.00 % $ 333,698 10.50 % N/A N/A Tri Counties Bank $ 478,390 15.06 % $ 254,110 8.00 % $ 333,519 10.50 % $ 317,637 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 441,847 13.90 % $ 190,684 6.00 % $ 270,136 8.50 % N/A N/A Tri Counties Bank $ 439,527 13.84 % $ 190,582 6.00 % $ 269,992 8.50 % $ 254,110 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 389,322 12.25 % $ 143,013 4.50 % $ 222,465 7.00 % N/A N/A Tri Counties Bank $ 439,527 13.84 % $ 142,937 4.50 % $ 222,346 7.00 % $ 206,464 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 441,847 10.68 % $ 165,442 4.00 % $ 165,442 4.00 % N/A N/A Tri Counties Bank $ 439,527 10.63 % $ 165,438 4.00 % $ 165,438 4.00 % $ 206,798 5.00 % Minimum Capital Minimum Capital Required to be Required – Basel III Required – Basel III Considered Well Actual Phase-in Schedule Fully Phased In Capitalized Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2015: Total Capital (to Risk Weighted Assets): Consolidated $ 474,436 15.09 % $ 251,555 8.00 % $ 330,165 10.50 % N/A N/A Tri Counties Bank $ 473,327 15.06 % $ 251,418 8.00 % $ 329,985 10.50 % $ 314,272 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 435,950 13.86 % $ 188,666 6.00 % $ 267,277 8.50 % N/A N/A Tri Counties Bank $ 434,841 13.84 % $ 188,563 6.00 % $ 267,131 8.50 % $ 251,418 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 385,747 12.27 % $ 141,499 4.50 % $ 220,110 7.00 % N/A N/A Tri Counties Bank $ 434,841 13.84 % $ 141,422 4.50 % $ 219,990 7.00 % $ 204,277 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 435,950 10.79 % $ 161,562 4.00 % $ 161,562 4.00 % N/A N/A Tri Counties Bank $ 434,841 10.76 % $ 161,601 4.00 % $ 161,601 4.00 % $ 202,002 5.00 % As of March 31, 2016, capital levels at the Company and the Bank exceed all capital adequacy requirements under the Basel III Capital Rules on a fully phased-in basis. Based on the ratios presented above, capital levels as March 31, 2016 at the Company and the Bank exceed the minimum levels necessary to be considered “well capitalized”.

Summary of Quarterly Results of

Summary of Quarterly Results of Operations (unaudited)	3 Months Ended
	Mar. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations (unaudited)	Note 30 - Summary of Quarterly Results of Operations (unaudited) The following table sets forth the results of operations for the periods indicated, and is unaudited; however, in the opinion of Management, it reflects all adjustments (which include only normal recurring adjustments) necessary to present fairly the summarized results for such periods. 2016 Quarters Ended December 31, September 30, June 30, March 31, (dollars in thousands, except per share data) Interest and dividend income: Loans: Discount accretion PCI – cash basis $ 269 Discount accretion PCI – other (45 ) Discount accretion PNCI 868 All other loan interest income 33,646 Total loan interest income 34,738 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,056 Total interest income 42,794 Interest expense 1,392 Net interest income 41,402 Provision for loan losses 209 Net interest income after provision for loan losses 41,193 Noninterest income 9,790 Noninterest expense 33,751 Income before income taxes 17,232 Income tax expense 6,558 Net income $ 10,674 Per common share: Net income (diluted) $ 0.46 Dividends $ 0.15 2015 Quarters Ended December 31, September 30, June 30, March 31, (dollars in thousands, except per share data) Interest and dividend income: Loans: Discount accretion PCI – cash basis $ 302 $ 445 $ 404 $ 172 Discount accretion PCI – other 1,392 1,090 907 1,274 Discount accretion PNCI 573 1,590 822 1,348 All other loan interest income 32,571 30,689 29,886 28,371 Total loan interest income 34,838 33,814 32,019 31,165 Debt securities, dividends and interest bearing cash at banks (not FTE) 7,652 7,518 7,848 6,560 Total interest income 42,490 41,332 39,867 37,725 Interest expense 1,349 1,339 1,346 1,382 Net interest income 41,141 39,993 38,521 36,343 (Benefit from) provision for loan losses (908 ) (866 ) (633 ) 197 Net interest income after provision for loan losses 42,049 40,859 39,154 36,146 Noninterest income 11,445 11,642 12,080 10,180 Noninterest expense 34,684 31,439 32,436 32,282 Income before income taxes 18,810 21,062 18,798 14,044 Income tax expense 7,388 8,368 7,432 5,708 Net income $ 11,422 $ 12,694 $ 11,366 $ 8,336 Per common share: Net income (diluted) $ 0.50 $ 0.55 $ 0.49 $ 0.36 Dividends $ 0.15 $ 0.13 $ 0.13 $ 0.11

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 26 California counties. Tri Counties Bank currently operates from 58 traditional branches and 12 in-store branches. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by TriCo and three acquired with the acquisition of North Valley Bancorp. See Note 17 – Junior Subordinated Debt. The unaudited condensed financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. In the opinion of the Company’s Management (“Management”), all adjustments, consisting solely of normal recurring adjustments, considered necessary for a fair presentation of results for the interim periods presented have been included. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,697,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet. These interim condensed consolidated financial statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2015 Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 10, 2016.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. As described in Note 2, the Company acquired three branch offices, and deposits totaling $161,231,000. The acquired assets and assumed liabilities were measured at estimated fair value values under the acquisition method of accounting. The Company made significant estimates and exercised significant judgment in accounting for the acquisition. Land and building were valued based on appraised values. An identifiable intangible was also recorded representing the fair value of the core deposit customer base based on an evaluation of the cost of such deposits relative to alternative funding sources.
Significant Group Concentration of Credit Risk	Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout the northern San Joaquin Valley, the Sacramento Valley and northern mountain regions of California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash on hand, amounts due from banks, and federal funds sold. Net cash flows are reported for loan and deposit transactions and other borrowings.
Investment Securities	Investment Securities The Company classifies its debt and marketable equity securities into one of three categories: trading, available for sale or held to maturity. Trading securities are bought and held principally for the purpose of selling in the near term. Held to maturity securities are those securities which the Company has the ability and intent to hold until maturity. These securities are carried at cost adjusted for amortization of premium and accretion of discount, computed by the effective interest method over their contractual lives. All other securities not included in trading or held to maturity are classified as available for sale. Available for sale securities are recorded at fair value. Unrealized gains and losses, net of the related tax effect, on available for sale securities are reported as a separate component of other accumulated comprehensive income in shareholders’ equity until realized. Premiums and discounts are amortized or accreted over the life of the related investment security as an adjustment to yield using the effective interest method. Dividend and interest income are recognized when earned. Realized gains and losses are derived from the amortized cost of the security sold. During the three months ended March 31, 2016 and throughout 2015, the Company did not have any securities classified as trading. The Company assesses other-than-temporary impairment (“OTTI”) based on whether it intends to sell a security or if it is likely that the Company would be required to sell the security before recovery of the amortized cost basis of the investment, which may be maturity. For debt securities, if we intend to sell the security or it is more likely than not that we will be required to sell the security before recovering its cost basis, the entire impairment loss would be recognized in earnings as an OTTI. If we do not intend to sell the security and it is not likely that we will be required to sell the security but we do not expect to recover the entire amortized cost basis of the security, only the portion of the impairment loss representing credit losses would be recognized in earnings. The credit loss on a security is measured as the difference between the amortized cost basis and the present value of the cash flows expected to be collected. Projected cash flows are discounted by the original or current effective interest rate depending on the nature of the security being measured for potential OTTI. The remaining impairment related to all other factors, the difference between the present value of the cash flows expected to be collected and fair value, is recognized as a charge to other comprehensive income (“OCI”). Impairment losses related to all other factors are presented as separate categories within OCI. The accretion of the amount recorded in OCI increases the carrying value of the investment and does not affect earnings. If there is an indication of additional credit losses the security is re-evaluated according to the procedures described above. No OTTI losses were recognized during the three months ended March 31, 2016 and throughout 2015.
Restricted Equity Securities	Restricted Equity Securities Restricted equity securities represent the Company’s investment in the stock of the Federal Home Loan Bank of San Francisco (“FHLB”) and are carried at par value, which reasonably approximates its fair value. While technically these are considered equity securities, there is no market for the FHLB stock. Therefore, the shares are considered as restricted investment securities. Management periodically evaluates FHLB stock for other-than-temporary impairment. Management’s determination of whether these investments are impaired is based on its assessment of the ultimate recoverability of cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of any decline in net assets of the FHLB as compared to the capital stock amount for the FHLB and the length of time this situation has persisted, (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB, (3) the impact of legislative and regulatory changes on institutions and, accordingly, the customer base of the FHLB, and (4) the liquidity position of the FHLB. As a member of the FHLB system, the Bank is required to maintain a minimum level of investment in FHLB stock based on specific percentages of its outstanding mortgages, total assets, or FHLB advances. The Bank may request redemption at par value of any stock in excess of the minimum required investment. Stock redemptions are at the discretion of the FHLB.
Loans Held for Sale	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors of current investor yield requirements. Net unrealized losses are recognized through a valuation allowance by charges to noninterest income. Mortgage loans held for sale are generally sold with the mortgage servicing rights retained by the Company. Gains or losses on the sale of loans that are held for sale are recognized at the time of the sale and determined by the difference between net sale proceeds and the net book value of the loans less the estimated fair value of any retained mortgage servicing rights.
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses Loans originated by the Company, i.e., not purchased or acquired in a business combination, are referred to as originated loans. Originated loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal amount outstanding, net of deferred loan fees and costs. Loan origination and commitment fees and certain direct loan origination costs are deferred, and the net amount is amortized as an adjustment of the related loan’s yield over the actual life of the loan. Originated loans on which the accrual of interest has been discontinued are designated as nonaccrual loans. Originated loans are placed in nonaccrual status when reasonable doubt exists as to the full, timely collection of interest or principal, or a loan becomes contractually past due by 90 days or more with respect to interest or principal and is not well secured and in the process of collection. When an originated loan is placed on nonaccrual status, all interest previously accrued but not collected is reversed. Income on such loans is then recognized only to the extent that cash is received and where the future collection of principal is probable. Interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of Management, the loan is estimated to be fully collectible as to both principal and interest. An allowance for loan losses for originated loans is established through a provision for loan losses charged to expense. The allowance is maintained at a level which, in Management’s judgment, is adequate to absorb probable incurred credit losses inherent in the loan portfolio as of the balance sheet date. Originated loans and deposit related overdrafts are charged against the allowance for loan losses when Management believes that the collectability of the principal is unlikely or, with respect to consumer installment loans, according to an established delinquency schedule. The allowance is an amount that Management believes will be adequate to absorb probable incurred losses inherent in existing loans, based on evaluations of the collectability, impairment and prior loss experience of loans. The evaluations take into consideration such factors as changes in the nature and size of the portfolio, overall portfolio quality, loan concentrations, specific problem loans, and current economic conditions that may affect the borrower’s ability to pay. The Company defines an originated loan as impaired when it is probable the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired originated loans are measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate. As a practical expedient, impairment may be measured based on the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent. When the measure of the impaired loan is less than the recorded investment in the loan, the impairment is recorded through a valuation allowance. In situations related to originated loans where, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession for other than an insignificant period of time to the borrower that the Company would not otherwise consider, the related loan is classified as a troubled debt restructuring (TDR). The Company strives to identify borrowers in financial difficulty early and work with them to modify to more affordable terms before their loan reaches nonaccrual status. These modified terms may include rate reductions, principal forgiveness, payment forbearance and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of the collateral. In cases where the Company grants the borrower new terms that result in the loan being classified as a TDR, the Company measures any impairment on the restructuring as noted above for impaired loans. TDR loans are classified as impaired until they are fully paid off or charged off. Loans that are in nonaccrual status at the time they become TDR loans, remain in nonaccrual status until the borrower demonstrates a sustained period of performance which the Company generally believes to be six consecutive months of payments, or equivalent. Otherwise, TDR loans are subject to the same nonaccrual and charge-off policies as noted above with respect to their restructured principal balance. Credit risk is inherent in the business of lending. As a result, the Company maintains an allowance for loan losses to absorb probable incurred losses inherent in the Company’s originated loan portfolio. This is maintained through periodic charges to earnings. These charges are included in the Consolidated Statements of Income as provision for loan losses. All specifically identifiable and quantifiable losses are immediately charged off against the allowance. However, for a variety of reasons, not all losses are immediately known to the Company and, of those that are known, the full extent of the loss may not be quantifiable at that point in time. The balance of the Company’s allowance for originated loan losses is meant to be an estimate of these probable incurred losses inherent in the portfolio. The Company formally assesses the adequacy of the allowance for originated loan losses on a quarterly basis. Determination of the adequacy is based on ongoing assessments of the probable risk in the outstanding originated loan portfolio, and to a lesser extent the Company’s originated loan commitments. These assessments include the periodic re-grading of credits based on changes in their individual credit characteristics including delinquency, seasoning, recent financial performance of the borrower, economic factors, changes in the interest rate environment, growth of the portfolio as a whole or by segment, and other factors as warranted. Loans are initially graded when originated. They are re-graded as they are renewed, when there is a new loan to the same borrower, when identified facts demonstrate heightened risk of nonpayment, or if they become delinquent. Re-grading of larger problem loans occurs at least quarterly. Confirmation of the quality of the grading process is obtained by independent credit reviews conducted by consultants specifically hired for this purpose and by various bank regulatory agencies. The Company’s method for assessing the appropriateness of the allowance for originated loan losses includes specific allowances for impaired originated loans, formula allowance factors for pools of credits, and allowances for changing environmental factors (e.g., interest rates, growth, economic conditions, etc.). Allowance factors for loan pools were based on historical loss experience by product type and prior risk rating. During the three months ended September 30, 2015, the Company modified its methodology used to determine the allowance for home equity lines of credit that are about to exit their revolving period, or have recently entered into their amortization period and are now classified as home equity loans. This change in methodology increased the required allowance for such lines and loans by $859,000, and $459,000, respectively, and represents the increase in estimated incurred losses in these lines and loans as of September 30, 2015 due to higher required contractual principal and interest payments of such lines and loans. Loans purchased or acquired in a business combination are referred to as acquired loans. Acquired loans are valued as of the acquisition date in accordance with Financial Accounting Standards Board Accounting Standards Codification (“FASB ASC”) Topic 805, Business Combinations Loans and Debt Securities Acquired with Deteriorated Credit Quality Acquired loans that are not PCI loans are referred to as purchased not credit impaired (PNCI) loans. PNCI loans are accounted for under FASB ASC Topic 310-20, Receivables – Nonrefundable Fees and Other Costs, Throughout these financial statements, and in particular in Note 4 and Note 5, when we refer to “Loans” or “Allowance for loan losses” we mean all categories of loans, including Originated, PNCI, PCI – cash basis, and PCI - other. When we are not referring to all categories of loans, we will indicate which we are referring to – Originated, PNCI, PCI – cash basis, or PCI - other. When referring to PNCI and PCI loans we use the terms “nonaccretable difference”, “accretable yield”, or “purchase discount”. Nonaccretable difference is the difference between undiscounted contractual cash flows due and undiscounted cash flows we expect to collect, or put another way, it is the undiscounted contractual cash flows we do not expect to collect. Accretable yield is the difference between undiscounted cash flows we expect to collect and the value at which we have recorded the loan on our financial statements. On the date of acquisition, all purchased loans are recorded on our consolidated financial statements at estimated fair value. Purchase discount is the difference between the estimated fair value of loans on the date of acquisition and the principal amount owed by the borrower, net of charge offs, on the date of acquisition. We may also refer to “discounts to principal balance of loans owed, net of charge-offs”. Discounts to principal balance of loans owed, net of charge-offs is the difference between principal balance of loans owed, net of charge-offs, and loans as recorded on our financial statements. Discounts to principal balance of loans owed, net of charge-offs arise from purchase discounts, and equal the purchase discount on the acquisition date. Loans are also categorized as “covered” or “noncovered”. Covered loans refer to loans covered by a Federal Deposit Insurance Corporation (“FDIC”) loss sharing agreement. Noncovered loans refer to loans not covered by a FDIC loss sharing agreement.
Foreclosed Assets	Foreclosed Assets Foreclosed assets include assets acquired through, or in lieu of, loan foreclosure. Foreclosed assets are held for sale and are initially recorded at fair value less estimated costs to sell at the date of foreclosure, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Any write-downs based on the asset’s fair value less costs to sell at the date of acquisition are charged to the allowance for loan and lease losses. Any recoveries based on the asset’s fair value less estimated costs to sell in excess of the recorded value of the loan at the date of acquisition are recorded to the allowance for loan and lease losses. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. If fair value declines subsequent to foreclosure, a valuation allowance is recorded through expense. Operating costs after acquisition are expensed. Revenue and expenses from operations and changes in the valuation allowance are included in other noninterest expense. Gain or loss on sale of foreclosed assets is included in noninterest income. Foreclosed assets that are not subject to a FDIC loss-share agreement are referred to as noncovered foreclosed assets. Foreclosed assets acquired through FDIC-assisted acquisitions that are subject to a FDIC loss-share agreement, and all assets acquired via foreclosure of covered loans are referred to as covered foreclosed assets. Covered foreclosed assets are reported exclusive of expected reimbursement cash flows from the FDIC. Foreclosed covered loan collateral is transferred into covered foreclosed assets at the loan’s carrying value, inclusive of the acquisition date fair value discount. Covered foreclosed assets are initially recorded at estimated fair value less estimated costs to sell on the acquisition date based on similar market comparable valuations less estimated selling costs. Any subsequent valuation adjustments due to declines in fair value will be charged to noninterest expense, and will be mostly offset by noninterest income representing the corresponding increase to the FDIC indemnification asset for the offsetting loss reimbursement amount. Any recoveries of previous valuation adjustments will be credited to noninterest expense with a corresponding charge to noninterest income for the portion of the recovery that is due to the FDIC.
Premises and Equipment	Premises and Equipment Land is carried at cost. Land improvements, buildings and equipment, including those acquired under capital lease, are stated at cost less accumulated depreciation and amortization. Depreciation and amortization expenses are computed using the straight-line method over the estimated useful lives of the related assets or lease terms. Asset lives range from 3-10 years for furniture and equipment and 15-40 years for land improvements and buildings.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of costs over fair value of net assets of businesses acquired. Goodwill and other intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually. Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment. The Company has an identifiable intangible asset consisting of core deposit intangibles (CDI). CDI are amortized over their respective estimated useful lives, and reviewed for impairment.
Impairment of Long-Lived Assets and Goodwill	Impairment of Long-Lived Assets and Goodwill Long-lived assets, such as premises and equipment, and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the consolidated balance sheet. As of December 31 of each year, goodwill is tested for impairment, and is tested for impairment more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount exceeds the asset’s fair value. This determination is made at the reporting unit level. The Company may choose to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then goodwill is deemed not to be impaired. However, if the Company concludes otherwise, or if the Company elected not to first assess qualitative factors, then the Company performs the first step of a two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. Second, if the carrying amount of the reporting unit exceeds its fair value, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill. Currently, and historically, the Company is comprised of only one reporting unit that operates within the business segment it has identified as “community banking”. Goodwill was not impaired as of December 31, 2015 because the fair value of the reporting unit exceeded its carrying value.
Mortgage Servicing Rights	Mortgage Servicing Rights Mortgage servicing rights (MSR) represent the Company’s right to a future stream of cash flows based upon the contractual servicing fee associated with servicing mortgage loans. Our MSR arise from residential and commercial mortgage loans that we originate and sell, but retain the right to service the loans. The net gain from the retention of the servicing right is included in gain on sale of loans in noninterest income when the loan is sold. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds and default rates and losses. Servicing fees are recorded in noninterest income when earned. The Company accounts for MSR at fair value. The determination of fair value of our MSR requires management judgment because they are not actively traded. The determination of fair value for MSR requires valuation processes which combine the use of discounted cash flow models and extensive analysis of current market data to arrive at an estimate of fair value. The cash flow and prepayment assumptions used in our discounted cash flow model are based on empirical data drawn from the historical performance of our MSR, which we believe are consistent with assumptions used by market participants valuing similar MSR, and from data obtained on the performance of similar MSR. The key assumptions used in the valuation of MSR include mortgage prepayment speeds and the discount rate. These variables can, and generally will, change from quarter to quarter as market conditions and projected interest rates change. The key risks inherent with MSR are prepayment speed and changes in interest rates. The Company uses an independent third party to determine fair value of MSR.
Indemnification Asset/Liability	Indemnification Asset/Liability The Company accounts for amounts receivable or payable under its loss-share agreements entered into with the FDIC in connection with its purchase and assumption of certain assets and liabilities of Granite as indemnification assets in accordance with FASB ASC Topic 805, Business Combinations
Reserve for Unfunded Commitments	Reserve for Unfunded Commitments The reserve for unfunded commitments is established through a provision for losses – unfunded commitments charged to noninterest expense. The reserve for unfunded commitments is an amount that Management believes will be adequate to absorb probable losses inherent in existing commitments, including unused portions of revolving lines of credits and other loans, standby letters of credits, and unused deposit account overdraft privilege. The reserve for unfunded commitments is based on evaluations of the collectability, and prior loss experience of unfunded commitments. The evaluations take into consideration such factors as changes in the nature and size of the loan portfolio, overall loan portfolio quality, loan concentrations, specific problem loans and related unfunded commitments, and current economic conditions that may affect the borrower’s or depositor’s ability to pay.
Income Taxes	Income Taxes The Company’s accounting for income taxes is based on an asset and liability approach. The Company recognizes the amount of taxes payable or refundable for the current year, and deferred tax assets and liabilities for the future tax consequences that have been recognized in its financial statements or tax returns. The measurement of tax assets and liabilities is based on the provisions of enacted tax laws. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized. Interest and/or penalties related to income taxes are reported as a component of noninterest income.
Off-Balance Sheet Credit Related Financial Instruments	Off-Balance Sheet Credit Related Financial Instruments In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under credit card arrangements, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded when they are funded.
Geographical Descriptions	Geographical Descriptions For the purpose of describing the geographical location of the Company’s loans, the Company has defined northern California as that area of California north of, and including, Stockton; central California as that area of the state south of Stockton, to and including, Bakersfield; and southern California as that area of the state south of Bakersfield.
Reclassifications	Reclassifications Certain amounts reported in previous consolidated financial statements have been reclassified to conform to the presentation in this report. These reclassifications did not affect previously reported net income or total shareholders’ equity.
Recent Accounting Pronouncements	Recent Accounting Pronouncements FASB issued ASU No. 2016-9 , Compensation – Stock Compensation (Topic 718).

Business Combinations (Tables)

Business Combinations (Tables) - Bank of America [Member]	3 Months Ended
	Mar. 31, 2016
Schedule of Fair Value of Consideration Transferred, Identifiable Net Assets Acquired and Resulting Goodwill	The following table discloses the calculation of the fair value of consideration transferred, the total identifiable net assets acquired and the resulting goodwill relating to the acquisition of three branch banking offices and certain deposits from Bank of America on March 18, 2016: (in thousands) March 18, 2016 Fair value of consideration transferred: Cash consideration $ 3,204 Total fair value of consideration transferred 3,204 Asset acquired: Cash and cash equivalents 159,520 Loans 289 Premises and equipment 1,590 Core deposit intangible 2,046 Other assets 141 Total assets acquired 163,586 Liabilities assumed: Deposits 161,231 Total liabilities assumed 161,231 Total net assets acquired 2,355 Goodwill recognized $ 849
Summary of Cash Paid and Estimated Fair Value Adjustments Resulting in Goodwill	A summary of the cash paid and estimated fair value adjustments resulting in the goodwill recorded in the acquisition of three branch banking offices and certain deposits from Bank of America on March 18, 2016 are presented below: March 18, 2016 (in thousands) Cash paid $ 3,204 Cost basis net assets acquired — Fair value adjustments: Loans — Premises and Equipment (309 ) Core deposit intangible (2,046 ) Goodwill $ 849

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Values of Investments in Debt and Equity Securities	The amortized cost and estimated fair values of investments in debt and equity securities are summarized in the following tables: March 31, 2016 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value Securities Available for Sale (in thousands) Obligations of U.S. government corporations and agencies $ 354,388 $ 5,903 $ (38 ) $ 360,253 Obligations of states and political subdivisions 111,796 2,552 (174 ) 114,174 Marketable equity securities 3,000 27 — 3,027 Total securities available for sale $ 469,184 $ 8,482 $ (212 ) $ 477,454 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 690,592 $ 18,317 $ (42 ) $ 708,867 Obligations of states and political subdivisions 14,541 402 (33 ) 14,910 Total securities held to maturity $ 705,133 $ 18,719 $ (75 ) $ 723,777 December 31, 2015 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value Securities Available for Sale (in thousands) Obligations of U.S. government corporations and agencies $ 312,917 $ 2,761 $ (1,996 ) $ 313,682 Obligations of states and political subdivisions 86,823 1,428 (33 ) 88,218 Corporate debt securities — — — — Marketable equity securities 3,000 — (15 ) 2,985 Total securities available for sale $ 402,740 $ 4,189 $ (2,044 ) $ 404,885 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 711,994 $ 8,394 $ (2,882 ) $ 717,506 Obligations of states and political subdivisions 14,536 277 (110 ) 14,703 Total securities held to maturity $ 726,530 $ 8,671 $ (2,992 ) $ 732,209
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity	For purposes of the following table, the entire outstanding balance of these mortgage-backed securities issued by U.S. government corporations and agencies is categorized based on final maturity date. Investment Securities Available for Sale Held to Maturity (In thousands) Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value Due in one year $ 5 $ 5 — — Due after one year through five years 13,608 14,124 $ 1,154 $ 1,178 Due after five years through ten years 16,948 17,856 838 899 Due after ten years 438,623 445,469 703,141 721,700 Totals $ 469,184 $ 477,454 $ 705,133 $ 723,777
Gross Unrealized Losses on Investment	Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2016 Value Loss Value Loss Value Loss Securities Available for Sale: (in thousands) Obligations of U.S. government corporations and agencies $ 31,493 $ (38 ) — — $ 31,493 $ (38 ) Obligations of states and political subdivisions 18,092 (164 ) $ 2,777 $ (10 ) 20,869 (174 ) Marketable equity securities — — — — — — Total securities available-for-sale $ 49,585 $ (202 ) $ 2,777 $ (10 ) $ 52,362 $ (212 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies — — $ 16,205 $ (42 ) $ 16,025 $ (42 ) Obligations of states and political subdivisions $ 1,188 $ (33 ) — — 1,188 (33 ) Total securities held-to-maturity $ 1,188 $ (33 ) $ 16,025 $ (42 ) $ 17,213 $ (75 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Value Loss Value Loss Value Loss Securities Available for Sale: (in thousands) Obligations of U.S. government corporations and agencies $ 193,306 $ (1,996 ) — — $ 193,306 $ (1,996 ) Obligations of states and political subdivisions 6,469 (33 ) — — 6,469 (33 ) Marketable equity securities 2,985 (15 ) — — 2,985 (15 ) Total securities available-for-sale $ 202,760 $ (2,044 ) — — $ 202,760 $ (2,044 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 198,481 $ (2,882 ) — — $ 198,481 $ (2,882 ) Obligations of states and political subdivisions 497 (11 ) $ 1,121 $ (99 ) 1,618 (110 ) Total securities held-to-maturity $ 198,978 $ (2,893 ) $ 1,121 $ (99 ) $ 200,099 $ (2,992 )

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Summary of Loan Balances	A summary of loan balances follows (in thousands): March 31, 2016 PCI - PCI - Originated PNCI Cash basis Other Total Mortgage loans on real estate: Residential 1-4 family $ 212,382 $ 101,117 — $ 1,636 $ 315,135 Commercial 1,209,721 286,943 — 17,189 1,513,853 Total mortgage loan on real estate 1,422,103 388,060 — 18,825 1,828,988 Consumer: Home equity lines of credit 277,253 28,148 $ 4,647 2,643 312,691 Home equity loans 35,712 4,016 124 1,513 41,365 Auto Indirect — — — — — Other 29,863 3,018 — 64 32,945 Total consumer loans 342,828 35,182 4,771 4,220 387,001 Commercial 174,505 17,521 — 4,531 196,557 Construction: Residential 38,748 13,523 — 712 52,983 Commercial 68,311 7,707 — — 76,018 Total construction 107,059 21,230 — 712 129,001 Total loans, net of deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Total principal balance of loans owed, net of charge-offs $ 2,052,057 $ 475,095 $ 12,085 $ 33,356 $ 2,572,593 Unamortized net deferred loan fees (5,562 ) — — — (5,562 ) Discounts to principal balance of loans owed, net of charge-offs — (13,102 ) (7,314 ) (5,068 ) (25,484 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Noncovered loans $ 2,046,495 $ 461,993 $ 4,771 $ 23,532 $ 2,536,791 Covered loans — — — 4,756 4,756 Total loans, net of unamortized deferred loan fees and discounts $ 2,046,495 $ 461,993 $ 4,771 $ 28,288 $ 2,541,547 Allowance for loan losses $ (31,168 ) $ (2,222 ) $ (118 ) $ (2,880 ) $ (36,388 ) A summary of loan balances follows (in thousands): December 31, 2015 PCI - PCI - Originated PNCI Cash basis Other Total Mortgage loans on real estate: Residential 1-4 family $ 207,585 $ 104,535 — $ 2,145 $ 314,265 Commercial 1,163,643 310,864 — 23,060 1,497,567 Total mortgage loan on real estate 1,371,228 415,399 — 25,205 1,811,832 Consumer: Home equity lines of credit 285,419 29,335 $ 4,954 2,784 322,492 Home equity loans 34,717 4,018 124 1,503 40,362 Other 28,998 3,367 — 64 32,429 Total consumer loans 349,134 36,720 5,078 4,351 395,283 Commercial 170,320 19,744 1 4,848 194,913 Construction: Residential 31,778 13,636 — 721 46,135 Commercial 66,285 8,489 — — 74,774 Total construction 98,063 22,125 — 721 120,909 Total loans, net of deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Total principal balance of loans owed, net of charge-offs $ 1,995,296 $ 507,935 $ 12,686 $ 39,693 $ 2,555,610 Unamortized net deferred loan fees (6,551 ) — — — (6,551 ) Discounts to principal balance of loans owed, net of charge-offs — (13,947 ) (7,607 ) (4,568 ) (26,122 ) Total loans, net of unamortized deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Noncovered loans $ 1,988,745 $ 493,988 $ 5,079 $ 29,890 $ 2,517,702 Covered loans — — — 5,235 5,235 Total loans, net of unamortized deferred loan fees and discounts $ 1,988,745 $ 493,988 $ 5,079 $ 35,125 $ 2,522,937 Allowance for loan losses $ (31,271 ) $ (1,848 ) $ (121 ) $ (2,771 ) $ (36,011 )
Change in Accretable Yield for PCI	The following is a summary of the change in accretable yield for PCI – other loans during the periods indicated (in thousands): Three months ended March 31, 2016 2015 Change in accretable yield: Balance at beginning of period $ 13,255 $ 14,159 Accretion to interest income (1,091 ) (1,818 ) Reclassification (to) from nonaccretable difference (184 ) 1,061 Balance at end of period $ 11,980 $ 13,402

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Summary of Activity in Allowance for Loan Losses, and Ending Balance of Loans, Net of Unearned Fees for Periods Indicated	The following tables summarize the activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated. Allowance for Loan Losses – Three Months Ended March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 2,507 $ 11,443 $ 11,253 $ 3,138 — $ 688 $ 5,271 $ 899 $ 812 $ 36,011 Charge-offs (37 ) (793 ) (214 ) — — (207 ) (38 ) — — (1,289 ) Recoveries 2 817 281 49 — 130 177 — 1 1,457 (Benefit) provision 293 428 (1,413 ) (76 ) — 76 729 167 5 209 Ending balance $ 2,765 $ 11,895 $ 9,907 $ 3,111 — $ 687 $ 6,139 $ 1,066 $ 818 $ 36,388 Ending balance: Individ. evaluated for impairment $ 454 $ 295 $ 705 $ 248 — $ 84 $ 1,934 — — $ 3,720 Loans pooled for evaluation $ 2,094 $ 10,141 $ 9,083 $ 2,864 — $ 603 $ 3,053 $ 1,014 $ 818 $ 29,670 Loans acquired with deteriorated credit quality $ 217 $ 1,459 $ 117 — — — $ 1,153 $ 52 — $ 2,998 Loans, net of unearned fees – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 315,135 $ 1,513,853 $ 312,691 $ 41,365 — $ 32,945 $ 196,557 $ 52,983 $ 76,018 $ 2,541,547 Individ. evaluated for impairment $ 7,015 $ 12,230 $ 5,994 $ 1,928 — $ 300 $ 3,871 — — $ 31,338 Loans pooled for evaluation $ 306,484 $ 1,484,434 $ 299,407 $ 37,800 — $ 32,581 $ 188,155 $ 52,271 $ 76,018 $ 2,477,150 Loans acquired with Deteriorated credit quality $ 1,636 $ 17,189 $ 7,290 $ 1,637 — $ 64 $ 4,531 $ 712 — $ 33,059 Allowance for Loan Losses - Year Ended December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 3,086 $ 9,227 $ 15,676 $ 1,797 $ 9 $ 719 $ 4,226 $ 1,434 $ 411 $ 36,585 Charge-offs (224 ) — (694 ) (242 ) (4 ) (972 ) (680 ) — — (2,816 ) Recoveries 204 243 666 252 42 500 677 1,728 140 4,452 (Benefit) provision (559 ) 1,973 (4,395 ) 1,331 (47 ) 441 1,048 (2,263 ) 261 (2,210 ) Ending balance $ 2,507 $ 11,443 $ 11,253 $ 3,138 — $ 688 $ 5,271 $ 899 $ 812 $ 36,011 Ending balance: Individ. evaluated for impairment $ 335 $ 395 $ 605 $ 294 — $ 74 $ 1,187 — — $ 2,890 Loans pooled for evaluation $ 2,112 $ 9,596 $ 10,423 $ 2,844 — $ 614 $ 2,983 $ 844 $ 812 $ 30,228 Loans acquired with deteriorated credit quality $ 60 $ 1,452 $ 225 — — — $ 1,101 $ 55 — $ 2,893 Loans, net of unearned fees – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 314,265 $ 1,497,567 $ 322,492 $ 40,362 — $ 32,429 $ 194,913 $ 46,135 $ 74,774 $ 2,522,937 Individ. evaluated for impairment $ 6,767 $ 32,407 $ 5,747 $ 1,731 — $ 288 $ 2,671 $ 4 $ 490 $ 50,105 Loans pooled for evaluation $ 305,353 $ 1,442,100 $ 309,007 $ 37,004 — $ 32,077 $ 187,393 $ 45,410 $ 74,284 $ 2,432,628 Loans acquired with deteriorated credit quality $ 2,145 $ 23,060 $ 7,738 $ 1,627 — $ 64 $ 4,849 $ 721 — $ 40,204 Allowance for Loan Losses – Three Months Ended March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 3,086 $ 9,227 $ 15,676 $ 1,797 $ 9 $ 719 $ 4,226 $ 1,434 $ 411 $ 36,585 Charge-offs (81 ) — (341 ) (11 ) — (268 ) (534 ) — — (1,235 ) Recoveries 1 96 119 3 20 152 87 11 19 508 (Benefit) provision (241 ) 1,128 (221 ) 191 (23 ) 41 197 (695 ) (180 ) 197 Ending balance $ 2,765 $ 10,451 $ 15,233 $ 1,980 $ 6 $ 644 $ 3,976 $ 750 $ 250 $ 36,055 Ending balance: Individ. evaluated for impairment $ 988 $ 799 $ 1,857 $ 337 $ 1 $ 92 $ 559 $ 59 — $ 4,692 Loans pooled for evaluation $ 1,709 $ 8,464 $ 12,932 $ 1,643 $ 5 $ 552 $ 2,205 $ 505 $ 250 $ 28,265 Loans acquired with deteriorated credit quality $ 69 $ 1,188 $ 443 — — — $ 1,212 $ 186 — $ 3,098 Loans, net of unearned fees – As of March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 282,383 $ 1,364,480 $ 345,210 $ 32,486 $ 32 $ 32,999 $ 177,540 $ 40,105 $ 45,648 $ 2,320,883 Individ. evaluated for impairment $ 7,786 $ 44,523 $ 6,290 $ 1,359 $ 14 $ 338 $ 1,967 $ 2,655 $ 94 $ 65,026 Loans pooled for evaluation $ 270,571 $ 1,292,006 $ 329,961 $ 30,374 $ 18 $ 32,591 $ 168,517 $ 36,714 $ 45,554 $ 2,206,306 Loans acquired with deteriorated credit quality $ 4,026 $ 27,951 $ 8,959 $ 753 — $ 70 $ 7,056 $ 736 — $ 49,551
Presentation of Credit Quality Indicators	The following tables present ending loan balances by loan category and risk grade for the periods indicated: Credit Quality Indicators – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loans: Pass $ 204,764 $ 1,185,024 $ 267,767 $ 31,962 — $ 29,237 $ 168,284 $ 38,414 $ 68,311 $ 1,993,763 Special mention 2,178 10,483 2,760 1,104 — 459 3,517 334 — 20,835 Substandard 5,440 14,214 6,726 2,646 — 167 2,704 — — 31,897 Loss — — — — — — — — — — Total originated $ 212,382 $ 1,209,721 $ 277,253 $ 35,712 — $ 29,863 $ 174,505 $ 38,748 $ 68,311 $ 2,046,495 PNCI loans: Pass $ 99,140 $ 267,577 $ 26,632 $ 3,791 — $ 2,829 $ 17,252 $ 13,523 $ 7,707 $ 438,451 Special mention 593 11,550 410 77 — 62 — — — 12,692 Substandard 1,384 7,816 1,106 148 — 127 269 — — 10,850 Loss — — — — — — — — — — Total PNCI $ 101,117 $ 286,943 $ 28,148 $ 4,016 — $ 3,018 $ 17,521 $ 13,523 $ 7,707 $ 461,993 PCI loans $ 1,636 $ 17,189 $ 7,290 $ 1,637 — $ 64 $ 4,531 $ 712 — $ 33,059 Total loans $ 315,135 $ 1,513,853 $ 312,691 $ 41,365 — $ 32,945 $ 196,557 $ 52,983 $ 76,018 $ 2,541,547 Credit Quality Indicators – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loans: Pass $ 199,837 $ 1,118,868 $ 275,251 $ 31,427 — $ 28,339 $ 166,559 $ 31,440 $ 66,285 $ 1,918,006 Special mention 2,018 10,321 2,494 1,027 — 415 1,037 334 — 17,646 Substandard 5,730 34,454 7,674 2,263 — 244 2,724 4 — 53,093 Loss — — — — — — — — — — Total originated $ 207,585 $ 1,163,643 $ 285,419 $ 34,717 — $ 28,998 $ 170,320 $ 31,778 $ 66,285 $ 1,988,745 PNCI loans: Pass $ 102,895 $ 293,935 $ 27,378 $ 3,789 — $ 3,164 $ 19,666 $ 13,636 $ 8,489 $ 472,952 Special mention 600 10,795 445 80 — 74 — — — 11,994 Substandard 1,040 6,134 1,512 149 — 129 78 — — 9,042 Loss — — — — — — — — — — Total PNCI $ 104,535 $ 310,864 $ 29,335 $ 4,018 — $ 3,367 $ 19,744 $ 13,636 $ 8,489 $ 493,988 PCI loans $ 2,145 $ 23,060 $ 7,738 $ 1,627 — $ 64 $ 4,849 $ 721 — $ 40,204 Total loans $ 314,265 $ 1,497,567 $ 322,492 $ 40,362 — $ 32,429 $ 194,913 $ 46,135 $ 74,774 $ 2,522,937
Analysis of Past Due and Nonaccrual Loans	The following table shows the ending balance of current, past due, and nonaccrual originated loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual Originated Loans – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loan balance: Past due: 30-59 Days $ 1,018 $ 496 $ 1,076 $ 641 — $ 59 $ 290 — — $ 3,580 60-89 Days 72 — 237 497 — 20 195 — — 1,021 > 90 Days 271 643 356 154 — 11 794 — — 2,229 Total past due 1,361 1,139 1,669 1,292 — 90 1,279 — — 6,830 Current 211,021 1,208,582 275,584 34,420 — 29,773 173,226 $ 38,748 $ 68,311 2,039,665 Total orig. loans $ 212,382 $ 1,209,721 $ 277,253 $ 35,712 — $ 29,863 $ 174,505 $ 38,748 $ 68,311 $ 2,046,495 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 2,963 $ 2,794 $ 3,383 $ 1,292 — $ 11 $ 2,204 $ 12 — $ 12,659 The following table shows the ending balance of current, past due, and nonaccrual PNCI loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual PNCI Loans – As of March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total PNCI loan balance: Past due: 30-59 Days $ 1,523 — — $ 60 — $ 4 — — $ 56 $ 1,643 60-89 Days — — — — — — — — — — > 90 Days 401 $ 80 $ 18 71 — 9 — — — 579 Total past due 1,924 80 18 131 — 13 — — 56 2,222 Current 99,193 286,863 28,130 3,885 — 3,005 $ 17,521 $ 13,523 7,651 459,771 Total PNCI loans $ 101,117 $ 286,943 $ 28,148 $ 4,016 — $ 3,018 $ 17,521 $ 13,523 $ 7,707 $ 461,993 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 679 $ 2,736 $ 539 $ 108 — $ 31 — — — $ 4,093 The following table shows the ending balance of current, past due, and nonaccrual originated loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual Originated Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Originated loan balance: Past due: 30-59 Days $ 791 $ 200 $ 1,033 $ 402 — $ 12 $ 2,197 — — $ 4,635 60-89 Days — 491 324 341 — 40 — — — 1,196 > 90 Days 271 3,425 520 82 — 19 24 — — 4,341 Total past due 1,062 4,116 1,877 825 — 71 2,221 — — 10,172 Current 206,523 1,159,527 283,542 33,892 — 28,927 168,099 $ 31,778 $ 66,285 1,978,573 Total orig. loans $ 207,585 $ 1,163,643 $ 285,419 $ 34,717 — $ 28,998 $ 170,320 $ 31,778 $ 66,285 $ 1,988,745 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 3,045 $ 14,196 $ 3,379 $ 1,195 — $ 21 $ 976 $ 12 — $ 22,824 The following table shows the ending balance of current, past due, and nonaccrual PNCI loans by loan category as of the date indicated: Analysis of Past Due and Nonaccrual PNCI Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total PNCI loan balance: Past due: 30-59 Days $ 3,106 $ 4,037 $ 92 $ 23 — — $ 1 — — $ 7,259 60-89 Days — — — — — $ 13 — — — 13 > 90 Days 58 748 275 71 — 10 — — $ 490 1,652 Total past due 3,164 4,785 367 94 — 23 1 — 490 8,924 Current 101,371 306,079 28,968 3,924 — 3,344 19,743 $ 13,636 7,999 485,064 Total PNCI loans $ 104,535 $ 310,864 $ 29,335 $ 4,018 — $ 3,367 $ 19,744 $ 13,636 $ 8,489 $ 493,988 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 348 $ 3,742 $ 676 $ 109 — $ 33 — — $ 490 $ 5,398
Impaired Loans	Impaired originated loans are those where management has concluded that it is probable that the borrower will be unable to pay all amounts due under the contractual terms. The following tables show the recorded investment (financial statement balance), unpaid principal balance, average recorded investment, and interest income recognized for impaired Originated and PNCI loans, segregated by those with no related allowance recorded and those with an allowance recorded for the periods indicated. Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,806 $ 7,917 $ 3,457 $ 1,154 $ 1 $ 10 $ 520 — — $ 16,865 Unpaid principal $ 5,963 $ 8,393 $ 6,325 $ 1,598 $ 10 $ 14 $ 635 $ 63 — $ 23,001 Average recorded Investment $ 3,846 $ 17,513 $ 3,210 $ 1,051 $ 2 $ 13 $ 548 $ 2 — $ 26,185 Interest income Recognized $ 19 $ 72 $ 8 $ 3 — — $ 7 — — $ 109 With an allowance recorded: Recorded investment $ 1,991 $ 1,440 $ 1,304 $ 666 — — $ 3,351 — — $ 8,752 Unpaid principal $ 2,065 $ 1,480 $ 1,393 $ 696 — — $ 3,376 — — $ 9,010 Related allowance $ 324 $ 175 $ 474 $ 248 — — $ 1,934 — — $ 3,155 Average recorded Investment $ 1,998 $ 1,429 $ 1,514 $ 670 — $ 1 $ 2,722 — — $ 8,334 Interest income Recognized $ 13 $ 20 $ 4 $ 5 — — $ 34 — — $ 76 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 604 $ 844 $ 539 $ 108 — $ 31 — — — $ 2,126 Unpaid principal $ 643 $ 908 $ 597 $ 112 — $ 51 — — — $ 2,311 Average recorded Investment $ 740 $ 988 $ 497 $ 89 — $ 32 $ 1 — $ 245 $ 2,592 Interest income Recognized $ 2 — — — — — — — — $ 2 With an allowance recorded: Recorded investment $ 614 $ 2,029 $ 694 — — $ 258 — — — $ 3,595 Unpaid principal $ 614 $ 2,142 $ 694 — — $ 258 — — — $ 3,708 Related allowance $ 130 $ 120 $ 231 — — $ 84 — — — $ 565 Average recorded Investment $ 307 $ 2,389 $ 650 $ 19 — $ 246 — — — $ 3,611 Interest income Recognized $ 2 $ 2 $ 7 — — $ 3 — — — $ 14 Impaired Originated Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,886 $ 27,109 $ 2,963 $ 947 — $ 20 $ 576 $ 4 — $ 35,505 Unpaid principal $ 5,998 $ 29,678 $ 6,079 $ 1,349 — $ 35 $ 688 $ 65 — $ 43,892 Average recorded Investment $ 3,586 $ 32,793 $ 2,982 $ 848 — $ 29 $ 494 $ 1,202 $ 50 $ 41,984 Interest income Recognized $ 81 $ 893 $ 23 $ 5 — — $ 29 — — $ 1,031 With an allowance recorded: Recorded investment $ 2,006 $ 1,418 $ 1,724 $ 674 — $ 1 $ 2,094 — — $ 7,917 Unpaid principal $ 2,073 $ 1,453 $ 1,904 $ 701 — $ 1 $ 2,117 — — $ 8,249 Related allowance $ 335 $ 146 $ 525 $ 256 — $ 1 $ 1,187 — — $ 2,450 Average recorded Investment $ 2,365 $ 2,180 $ 2,455 $ 589 — $ 23 $ 1,716 $ 141 — $ 9,469 Interest income Recognized $ 49 $ 74 $ 31 $ 26 — — $ 122 — — $ 302 Impaired PNCI Loans – As of December 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 875 $ 1,132 $ 454 $ 71 — $ 33 $ 1 — $ 490 $ 3,056 Unpaid principal $ 908 $ 1,248 $ 505 $ 73 — $ 52 $ 1 — $ 490 $ 3,277 Average recorded Investment $ 609 $ 749 $ 400 $ 48 — $ 35 $ 4 — $ 245 $ 2,090 Interest income Recognized $ 31 $ 32 $ 3 $ 2 — $ 1 — — $ 18 $ 87 With an allowance recorded: Recorded investment — $ 2,748 $ 606 $ 39 — $ 234 — — — $ 3,627 Unpaid principal — $ 2,858 $ 612 $ 40 — $ 234 — — — $ 3,744 Related allowance — $ 248 $ 80 $ 39 — $ 73 — — — $ 440 Average recorded Investment $ 417 $ 1,447 $ 521 $ 19 — $ 227 — — — $ 2,631 Interest income Recognized — $ 149 $ 14 — — $ 11 — — — $ 174 Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 3,360 $ 40,094 $ 2,631 $ 870 $ 10 $ 19 $ 748 $ 2,373 $ 94 $ 50,199 Unpaid principal $ 5,330 $ 43,898 $ 5,791 $ 1,335 $ 30 $ 23 $ 776 $ 6,585 $ 186 $ 63,954 Average recorded Investment $ 3,323 $ 39,286 $ 2,816 $ 810 $ 12 $ 22 $ 580 $ 2,387 $ 96 $ 49,332 Interest income Recognized $ 8 $ 283 — — — — $ 11 — — $ 302 With an allowance recorded: Recorded investment $ 3,402 $ 3,281 $ 2,808 $ 464 $ 4 $ 43 $ 1,214 $ 282 — $ 11,498 Unpaid principal $ 3,570 $ 3,432 $ 3,077 $ 566 $ 6 $ 53 $ 1,316 $ 282 — $ 12,302 Related allowance $ 915 $ 598 $ 1,636 $ 337 $ 1 $ 17 $ 559 $ 59 — $ 4,122 Average recorded Investment $ 3,063 $ 3,112 $ 2,997 $ 484 $ 4 $ 42 $ 1,276 $ 282 — $ 11,260 Interest income Recognized $ 22 $ 40 $ 12 $ 1 — — $ 15 $ 4 — $ 94 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2015 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total With no related allowance recorded: Recorded investment $ 389 $ 313 $ 414 $ 25 — $ 59 $ 5 — — $ 1,205 Unpaid principal $ 488 $ 2,601 $ 450 $ 25 — $ 78 $ 5 — — $ 3,647 Average recorded Investment $ 366 $ 339 $ 380 $ 25 — $ 48 $ 6 — — $ 1,164 Interest income Recognized $ 1 — — — — — — — — $ 1 With an allowance recorded: Recorded investment $ 635 $ 835 $ 437 — — $ 217 — — — $ 2,124 Unpaid principal $ 644 $ 838 $ 437 — — $ 217 — — — $ 2,136 Related allowance $ 73 $ 201 $ 221 — — $ 75 — — — $ 570 Average recorded Investment $ 734 $ 490 $ 436 — — $ 219 — — — $ 1,879 Interest income Recognized $ 2 $ 10 $ 4 — — $ 2 — — — $ 18
Troubled Debt Restructurings	The following tables show certain information regarding Troubled Debt Restructurings (TDRs) that occurred during the periods indicated: TDR Information for the Three Months Ended March 31, 2016 RE Mortgage Home Equity Auto Other Construction (dollars in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Number — 2 1 1 — — 1 — — 5 Pre-mod outstanding principal balance — $ 78 $ 132 $ 105 — — $ 12 — — $ 327 Post-mod outstanding principal balance — $ 115 $ 132 $ 105 — — $ 12 — — $ 364 Financial impact due to TDR taken as additional provision — — $ 19 — — — $ 8 — — $ 27 Number that defaulted during the period — — — — — — — — — — Recorded investment of TDRs that defaulted during the period — — — — — — — — — — the default of previous TDR taken as charge-offs or additional provisions — — — — — — — — — — The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the Three Months Ended March 31, 2015 RE Mortgage Home Equity Auto Other Construction (dollars in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Number 1 1 — — — 2 1 — — 5 Pre-mod outstanding principal balance $ 108 $ 124 — — — $ 89 $ 287 — — $ 608 Post-mod outstanding principal balance $ 110 $ 124 — — — $ 89 $ 288 — — $ 611 Financial impact due to TDR taken as additional provision $ 8 $ (5 ) — — — $ 5 $ 164 — — $ 172 Number that defaulted during the period — — 1 — — — — — — 1 Recorded investment of TDRs that defaulted during the period — — $ 47 — — — — — — $ 47 the default of previous TDR taken as charge-offs or additional provisions — — — — — — — — — —

Foreclosed Assets (Tables)

Foreclosed Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Summary of Activity in Balance of Foreclosed Assets	A summary of the activity in the balance of foreclosed assets follows (in thousands): Three months ended March 31, 2016 Three months ended March 31, 2015 Noncovered Covered Total Noncovered Covered Total Beginning balance, net $ 5,369 — $ 5,369 $ 4,449 $ 445 $ 4,894 Additions/transfers from loans 416 — 416 1,560 — 1,560 Dispositions/sales (1,325 ) — (1,325 ) (495 ) — (495 ) Valuation adjustments 11 — 11 (67 ) — (67 ) Ending balance, net $ 4,471 — $ 4,471 $ 5,447 $ 445 $ 5,892 Ending valuation allowance $ 572 — $ 572 $ 263 — $ 263 Ending number of foreclosed assets 21 21 29 1 30 Proceeds from sale of foreclosed assets $ 1,417 — $ 1,417 $ 806 — $ 806 Gain on sale of foreclosed assets $ 92 — $ 92 $ 311 — $ 311

Premises and Equipment (Tables)

Premises and Equipment (Tables)	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Premises and equipment were comprised of: March 31, December 31, (In thousands) Land & land improvements $ 11,051 $ 8,909 Buildings 46,245 38,643 Furniture and equipment 27,130 31,081 84,426 78,633 Less: Accumulated depreciation (33,053 ) (35,518 ) 51,373 43,115 Construction in progress 149 696 Total premises and equipment $ 51,522 $ 43,811

Cash Value of Life Insurance (T

Cash Value of Life Insurance (Tables)	3 Months Ended
	Mar. 31, 2016
Investments, All Other Investments [Abstract]
Summary of Activity in Balance of Cash Value of Life Insurance	A summary of the activity in the balance of cash value of life insurance follows (in thousands): Three months ended March 31, 2016 2015 Beginning balance $ 94,560 $ 92,337 Increase in cash value of life insurance 696 675 Ending balance $ 95,256 $ 93,012 End of period death benefit $ 166,216 $ 165,847 Number of policies owned 187 189 Insurance companies used 14 14 Current and former employees and directors covered 59 60

Goodwill and Other Intangible47

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill Intangible	The following table summarizes the Company’s goodwill intangible as of the dates indicated: (dollar in thousands) March 31, Additions Reductions December 31, Goodwill $ 64,311 $ 849 — $ 63,462
Summary of Core Deposit Intangibles	The following table summarizes the Company’s core deposit intangibles as of the dates indicated: (dollar in thousands) March 31, Additions Reductions/ Fully December 31, Core deposit intangibles $ 10,120 $ 2,046 — — $ 8,074 Accumulated amortization (2,479 ) — $ (299 ) — (2,180 ) Core deposit intangibles, net $ 7,641 $ 2,046 $ (299 ) — $ 5,894
Estimated Core Deposit Intangible Amortization	The following table summarizes the Company’s estimated core deposit intangible amortization (dollars in thousands): Years Ended Estimated Core Deposit 2016 $ 1,377 2017 1,389 2018 1,324 2019 1,228 2020 1,228 Thereafter $ 1,095

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Fair Value of Mortgage Servicing Rights	The following tables summarize the activity in, and the main assumptions we used to determine the fair value of mortgage servicing rights (“MSRs”) for the periods indicated (dollars in thousands): Three months ended March 31, 2016 2015 Balance at beginning of period $ 7,618 $ 7,378 Additions 220 185 Change in fair value (698 ) (506 ) Balance at end of period $ 7,140 $ 7,057 Contractually specified servicing fees, late fees and ancillary fees earned $ 517 $ 534 Balance of loans serviced at: Beginning of period $ 817,917 $ 840,288 End of period $ 813,800 $ 832,143 Weighted-average prepayment speed (CPR) 11.6 % 13.0 % Weighted-average discount rate 10.0 % 10.0 %

Indemnification Asset (Tables)

Indemnification Asset (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Summary of Activity in Balance of Indemnification Asset (Liability)	A summary of the activity in the balance of indemnification asset follows (in thousands): Three months ended March 31, 2016 2015 Beginning balance $ (521 ) $ (349 ) Effect of actual and estimated future covered losses and recoveries (111 ) (62 ) Reimbursable (revenue) expenses incurred (4 ) (3 ) Payments made to (received from) FDIC 29 (19 ) Ending balance $ (607 ) $ (433 ) Amount of indemnification asset (liability) recorded in other assets $ 11 $ 114 Amount of indemnification asset (liability) recorded in other liabilities (618 ) (547 ) Ending balance $ (607 ) $ (433 )

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Other Assets	Other assets were comprised of (in thousands): March 31, December 31, Deferred tax asset, net $ 33,803 $ 36,440 Prepaid expense 3,130 3,062 Software 1,892 1,290 Advanced compensation 571 673 Capital Trusts 1,697 1,696 Investment in Low Housing Tax Credit Funds 14,138 4,223 Miscellaneous other assets 2,489 1,207 Total other assets $ 57,720 $ 48,591

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2016
Banking and Thrift [Abstract]
Summary of Balances of Deposits	A summary of the balances of deposits follows (in thousands): March 31 December 31, Noninterest-bearing demand $ 1,178,001 $ 1,155,695 Interest-bearing demand 884,638 853,961 Savings 1,368,644 1,281,540 Time certificates, $250,000 and over 77,184 75,897 Other time certificates 276,573 264,173 Total deposits $ 3,785,040 $ 3,631,266

Reserve for Unfunded Commitme52

Reserve for Unfunded Commitments (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Summary of Activity in Reserve for Unfunded Commitments	The following tables summarize the activity in reserve for unfunded commitments for the periods indicated (dollars in thousands): Three months ended March 31, 2016 2015 Balance at beginning of period $ 2,475 $ 2,145 Provision for losses – Unfunded commitments — (130 ) Balance at end of period $ 2,475 $ 2,015

Other Liabilities (Tables)

Other Liabilities (Tables)	3 Months Ended
	Mar. 31, 2016
Other Liabilities Disclosure [Abstract]
Components of Other Liabilities	Other liabilities were comprised of (in thousands): March 31, December 31, Deferred compensation $ 6,844 $ 6,725 Pension liability 26,557 26,182 Joint beneficiary agreements 2,581 2,529 Low income housing tax credit fund commitments 13,128 3,330 Accrued salaries and benefits expense 3,133 3,851 Taxes Payable 5,494 — Loan escrow and servicing payable 947 2,037 Deferred revenue 1,067 1,082 Unsettled investment security purchases — 17,072 Branch purchase settlement due 4,242 — Miscellaneous other liabilities 4,071 2,485 Total other liabilities $ 68,064 $ 65,293

Other Borrowings (Tables)

Other Borrowings (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Summary of Balances of Other Borrowings	A summary of the balances of other borrowings follows: March 31, December 31, (in thousands) Other collateralized borrowings, fixed rate, as of March 31, 2016 of 0.05%, payable on April 1, 2016 $ 18,671 $ 12,328 Total other borrowings $ 18,671 $ 12,328

Junior Subordinated Debt (Table

Junior Subordinated Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Summary of Terms and Recorded Balance of Subordinated Debenture	The following table summarizes the terms and recorded balance of each subordinated debenture as of the date indicated (dollars in thousands): Coupon Rate As of March 31, 2016 December 31, 2015 Subordinated Debt Series Maturity Face (Variable) Current Recorded Recorded TriCo Cap Trust I 10/7/2033 $ 20,619 3.05 % 3.67 % $ 20,619 $ 20,619 TriCo Cap Trust II 7/23/2034 20,619 2.55 % 3.17 % 20,619 20,619 North Valley Trust II 4/24/2033 6,186 3.25 % 3.87 % 5,065 5,055 North Valley Trust III 4/24/2034 5,155 2.80 % 3.42 % 3,976 3,966 North Valley Trust IV 3/15/2036 10,310 1.33 % 1.96 % 6,240 6,211 $ 62,889 $ 56,519 $ 56,470

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Commitments under Non-Cancelable Operating Leases with Initial or Remaining Terms of One Year or More	At December 31, 2015, future minimum commitments under non-cancelable operating leases with initial or remaining terms of one year or more are as follows: Operating (in thousands) 2016 $ 3,067 2017 2,400 2018 1,755 2019 1,211 2020 2,382 Thereafter 659 Future minimum lease payments $ 11,474
Summary of Bank's Commitments and Contingent Liabilities	The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) March 31, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 200,549 $ 196,399 Consumer loans 398,860 394,278 Real estate mortgage loans 51,723 42,793 Real estate construction loans 59,574 71,846 Standby letters of credit 8,152 8,330 Deposit account overdraft privilege 96,997 94,473

Stock Options and Other Equit57

Stock Options and Other Equity-Based Incentive Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Activity	Stock option activity during the three months ended March 31, 2016 is summarized in the following table: Number Option Price per Share Weighted Weighted Outstanding at December 31, 2015 948,350 $ 12.63 to $ 25.91 $ 17.94 Options granted — — to — — — Options exercised (10,000 ) $ 17.25 to $ 17.25 $ 17.25 Options forfeited — — to — — Outstanding at March 31, 2016 938,350 $ 12.63 to $ 25.91 $ 17.95
Summary of Options Outstanding	The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of March 31, 2016: Currently Currently Not Total Number of options 702,150 236,200 938,350 Weighted average exercise price $ 18.10 $ 17.48 $ 17.95 Intrinsic value (in thousands) $ 5,082 $ 1,852 $ 6,934 Weighted average remaining contractual term (yrs.) 3.9 6.4 4.5
Restricted Stock Unit (RSU) Activity	Restricted stock unit (RSU) activity is summarized in the following table for the dates indicated: Service Condition Vesting RSUs Market Plus Service Condition Vesting RSUs Number Weighted Date of Grant Number of RSUs Weighted Average Fair Value on Date of Grant Outstanding at December 31, 2015 46,286 32,097 RSUs granted 1,192 $ 25.50 — — RSUs added through dividend credits 281 — RSUs released — — RSUs forfeited/expired — — Outstanding at March 31, 2016 47,759 32,097

Noninterest Income and Expense

Noninterest Income and Expense (Tables)	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Components of Other Noninterest Income	The components of other noninterest income were as follows (in thousands): Three months ended March 31, 2016 2015 Service charges on deposit accounts $ 3,365 $ 3,600 ATM and interchange fees 3,393 3,002 Other service fees 728 714 Mortgage banking service fees 517 534 Change in value of mortgage servicing rights (698 ) (506 ) Total service charges and fees 7,305 7,344 Gain on sale of loans 803 622 Commissions on sale of non-deposit investment products 532 965 Increase in cash value of life insurance 696 675 Change in indemnification asset (115 ) (65 ) Gain on sale of foreclosed assets 92 311 Sale of customer checks 119 128 Lease brokerage income 195 137 Loss on disposal of fixed assets (31 ) (84 ) Other 194 147 Total other noninterest income 2,485 2,836 Total noninterest income $ 9,790 $ 10,180
Components of Noninterest Expense	The components of noninterest expense were as follows (in thousands): Three months ended March 31, 2016 2015 Base salaries, net of deferred loan origination costs $ 12,708 $ 11,744 Incentive compensation 1,739 1,596 Benefits and other compensation costs 4,818 4,760 Total salaries and benefits expense 19,265 18,100 Occupancy 2,308 2,417 Equipment 1,386 1,414 Data processing and software 1,843 1,952 ATM network charges 1,006 770 Telecommunications 685 886 Postage 463 312 Courier service 271 248 Advertising 895 808 Assessments 632 651 Operational losses 164 124 Professional fees 809 1,119 Foreclosed assets expense 46 98 (Reversal of) provision for foreclosed asset losses (11 ) 67 Change in reserve for unfunded commitments — (130 ) Intangible amortization 299 289 Merger and acquisition expense 622 586 Other miscellaneous expense 3,068 2,571 Total other noninterest expense 14,486 14,182 Total noninterest expense $ 33,751 $ 32,282 Merger and acquisition expense: Base salaries (outside temporary help) $ 187 — Data processing and software — $ 108 Professional fees 180 120 Advertising and marketing 114 — Other miscellaneous expense 141 358 Total merger expense $ 622 $ 586

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Reconciliation of Effective Tax Rate and Statutory Federal Income Tax Rate	The effective tax rate and the statutory federal income tax rate are reconciled for the periods indicated as follows: Three months ended March 31, 2016 2015 Federal statutory income tax rate 35.0 % 35.0 % State income taxes, net of federal tax benefit 6.3 6.9 Tax-exempt interest on municipal obligations (1.8 ) (0.4 ) Increase in cash value of insurance policies (1.4 ) (1.7 ) Other — 0.8 Effective Tax Rate 38.1 % 40.6 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Earnings per share have been computed based on the following: Three months ended (In thousands) 2016 2015 Net income $ 10,674 $ 8,336 Average number of common shares outstanding 22,783 22,727 Effect of dilutive stock options and restricted stock 263 223 Average number of common shares outstanding used to calculate diluted earnings per share 23,046 22,950 Options excluded from diluted earnings per share because the effect of these options was antidilutive 23 23 Restricted stock excluded from diluted earnings per share because the effect of these restricted stock was antidilutive — —

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Components of Other Comprehensive Income and Related Tax Effects	The components of other comprehensive income and related tax effects are as follows: Three Months Ended March 31, 2016 2015 (in thousands) Unrealized holding gains (losses) on available for sale securities before reclassifications $ 6,125 $ 15 Amounts reclassified out of accumulated other comprehensive income- — — Unrealized holding gains (losses) on available for sale securities after reclassifications 6,125 15 Tax effect (2,575 ) (6 ) Unrealized holding gains (losses) on available for sale securities, net of tax 3,550 9 Change in unfunded status of the supplemental retirement plans before reclassifications — — Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost — (14 ) Amortization of actuarial losses — 206 Total amounts reclassified out of accumulated other comprehensive income — 192 Change in unfunded status of the supplemental retirement plans after reclassifications — 192 Tax effect — (81 ) Change in unfunded status of the supplemental retirement plans, net of tax — 111 Change in joint beneficiary agreement liability before reclassifications — — Amounts reclassified out of accumulated other comprehensive income — — Change in joint beneficiary agreement liability after reclassifications — — Tax effect — — Change in joint beneficiary agreement liability, net of tax — — Total other comprehensive gain (loss) $ 3,550 $ 120
Components of Accumulated Other Comprehensive Income	The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: March 31, December 31, 2016 2015 (in thousands) Net unrealized gains on available for sale securities $ 8,270 $ 2,145 Tax effect (3,477 ) (902 ) Unrealized holding gains on available for sale securities, net of tax 4,793 1,243 Unfunded status of the supplemental retirement plans (5,735 ) (5,735 ) Tax effect 2,411 2,411 Unfunded status of the supplemental retirement plans, net of tax (3,324 ) (3,324 ) Joint beneficiary agreement liability 303 303 Tax effect — — Joint beneficiary agreement liability, net of tax 303 303 Accumulated other comprehensive loss $ 1,772 $ (1,778 )

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Net Periodic Benefit Cost Recognized for Supplemental Retirement Plans	The following table sets forth the net periodic benefit cost recognized for the plans: Three months ended March 31, 2016 2015 (In thousands) Net pension cost included the following components: Service cost-benefits earned during the period $ 260 $ 256 Interest cost on projected benefit obligation 256 239 Amortization of net obligation at transition — — Amortization of prior service cost (10 ) (14 ) Recognized net actuarial loss 138 206 Net periodic pension cost $ 644 $ 687

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2016
Related Party Transactions [Abstract]
Summary of Activity in Lending Transactions	The following table summarizes the activity in these loans for periods indicated (in thousands): Balance December 31, 2014 $ 3,132 Advances/new loans 3,098 Removed/payments (2,029 ) Balance December 31, 2015 $ 4,201 Advances/new loans 71 Removed/payments (648 ) Balance March 31, 2016 $ 3,624

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis	The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at March 31, 2016 Total Level 1 Level 2 Level 3 Securities available for sale: Obligations of U.S. government corporations and agencies $ 360,253 — $ 360,253 — Obligations of states and political subdivisions 114,174 — 114,174 — Corporate debt securities — — — — Marketable equity services 3,027 $ 3,027 — — Mortgage servicing rights 7,140 — — $ 7,140 Total assets measured at fair value $ 484,594 $ 3,027 $ 474,427 $ 7,140 Fair value at December 31, 2015 Total Level 1 Level 2 Level 3 Securities available-for-sale: Obligations of U.S. government corporations and agencies $ 313,682 — $ 313,682 — Obligations of states and political subdivisions 88,218 — 88,218 — Corporate debt securities — — — — Marketable equity securities 2,985 $ 2,985 — — Mortgage servicing rights 7,618 — — $ 7,618 Total assets measured at fair value $ 412,503 $ 2,985 $ 401,900 $ 7,618
Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis	The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Transfers Change Beginning into (out of) Included Ending Three months ended March 31, Balance Level 3 in Earnings Issuances Balance 2016: Mortgage servicing rights $ 7,618 — $ (698 ) $ 220 $ 7,140 2015: Mortgage servicing rights $ 7,378 — $ (506 ) $ 185 $ 7,057
Quantitative Information about Recurring Level 3 Fair Value Measurements	The following table presents quantitative information about recurring Level 3 fair value measurements at March 31, 2016: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Mortgage Servicing Rights $ 7,140 Discounted cash flow Constant prepayment rate 6.4%-20.6%, 11.6% Discount rate 10.0%-12.0%, 10.0% The following table presents quantitative information about recurring Level 3 fair value measurements at December 31, 2015: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Mortgage Servicing Rights $ 7,618 Discounted cash flow Constant prepayment rate 6.3%-20.5%, 9.8% Discount rate 10.0%-12.0%, 10.0%
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): Total Gains Three months ended March 31, 2016 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 4,355 — — $ 4,355 $ (828 ) Foreclosed assets 1,383 — — 1,383 — Total assets measured at fair value $ 5,738 — — $ 5,738 $ (828 ) Total Gains Year ended December 31, 2015 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 4,649 — — $ 4,649 $ (660 ) Foreclosed assets 1,540 1,540 (102 ) Total assets measured at fair value $ 6,189 — — $ 6,189 $ (762 ) Total Gains Three months ended March 31, 2015 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 3,690 — — $ 3,690 $ (181 ) Foreclosed assets 2,384 — — 2,384 (64 ) Total assets measured at fair value $ 6,074 — — $ 6,074 $ (245 )
Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis	The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at March 31, 2016: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Impaired Originated & PNCI loans $ 4,355 Sales comparison Adjustment for differences (0.0)%-(5.0)%, (5.0)% Income approach Capitalization rate 7.0%-7.0%, 7.0% Foreclosed assets (Land & construction) $ — Sales comparison Adjustment for differences N/A Foreclosed assets (residential (Residential real estate) $ 1,116 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (Commercial real estate) $ 267 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2015: Fair Value Valuation Unobservable Range, (in thousands) Technique Inputs Weighted Average Impaired Originated & PNCI loans $ 4,649 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Income approach Capitalization rate 7.0%-8.0%, 7.25% Foreclosed assets (Land & construction) $ 96 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (residential (Residential real estate) $ 1,117 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)% Foreclosed assets (Commercial real estate) $ 267 Sales comparison Adjustment for differences (5.0)%-(5.0)%, (5.0)%
Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets	The estimated fair values of financial instruments that are reported at amortized cost in the Corporation’s consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, were as follows (in thousands): March 31, 2016 December 31, 2015 Carrying Fair Carrying Fair Amount Value Amount Value Financial assets: Level 1 inputs: Cash and due from banks $ 76,702 $ 76,702 $ 94,305 $ 94,305 Cash at Federal Reserve and other banks 312,176 312,176 209,156 209,156 Level 2 inputs: Securities held to maturity 705,133 723,777 726,530 732,208 Restricted equity securities 16,956 N/A 16,596 N/A Loans held for sale 2,240 2,240 1,873 1,873 Level 3 inputs: Loans, net 2,505,159 2,590,603 2,486,926 2,555,297 Financial liabilities: Level 2 inputs: Deposits 3,785,040 3,784,443 3,631,266 3,630,129 Other borrowings 18,671 18,671 12,328 12,328 Level 3 inputs: Junior subordinated debt $ 56,519 45,837 $ 56,470 $ 44,527 Contract Fair Contract Fair Amount Value Amount Value Off-balance sheet: Level 3 inputs: Commitments $ 710,706 $ 7,107 $ 705,316 $ 7,053 Standby letters of credit $ 8,152 $ 82 $ 8,330 $ 83 Overdraft privilege commitments $ 96,997 $ 970 $ 94,473 $ 945

TriCo Bancshares Condensed Fi65

TriCo Bancshares Condensed Financial Statements (Parent Only) (Tables)	3 Months Ended
	Mar. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets March 31, December 31, 2016 2015 (In thousands) Assets Cash and Cash equivalents $ 2,686 $ 2,565 Investment in Tri Counties Bank 515,938 504,655 Other assets 1,702 1,714 Total assets $ 520,326 $ 508,934 Liabilities and shareholders’ equity Other liabilities $ 371 $ 348 Junior subordinated debt 56,519 56,470 Total liabilities 56,890 56,818 Shareholders’ equity: Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,785,173 and 22,775,173 shares, respectively 248,101 247,587 Retained earnings 213,563 206,307 Accumulated other comprehensive income (loss), net 1,772 (1,778 ) Total shareholders’ equity 463,436 452,116 Total liabilities and shareholders’ equity $ 520,326 $ 508,934
Condensed Statements of Income	Condensed Statements of Income Three months ended March 31, 2016 2015 (In thousands) Interest expense $ 535 $ 482 Administration expense 149 153 Loss before equity in net income of Tri Counties Bank (684 ) (635 ) Equity in net income of Tri Counties Bank: Distributed 3,680 2,120 Under distributed 7,390 6,584 Income tax benefit 288 267 Net income $ 10,674 $ 8,336
Condensed Statements of Comprehensive Income	Condensed Statements of Comprehensive Income Three months ended March 31, 2016 2015 (In thousands) Net income $ 10,674 $ 8,336 Other comprehensive loss, net of tax: Increase (decrease) in unrealized gains on available for sale securities arising during the period 3,550 9 Change in minimum pension liability — 111 Other comprehensive loss 3,550 120 Comprehensive income $ 14,224 $ 8,456
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows Three months ended March 31, 2016 2015 (In thousands) Operating activities: Net income $ 10,674 $ 8,336 Adjustments to reconcile net income to net cash provided by operating activities: Under distributed equity in earnings of Tri Counties Bank (7,390 ) (6,584 ) Equity compensation vesting expense 331 324 Stock option excess tax benefits (10 ) (18 ) Net change in other assets and liabilities (249 ) (124 ) Net cash provided by operating activities 3,356 1,934 Investing activities: None Financing activities: Stock option excess tax benefits 10 18 Issuance of common stock through option exercise 173 405 Repurchase of common stock — (27 ) Cash dividends paid — common (3,418 ) (2,515 ) Net cash used for financing activities (3,235 ) (2,119 ) Net change in cash and cash equivalents 121 (185 ) Cash and cash equivalents at beginning of year 2,565 2,229 Cash and cash equivalents at end of year $ 2,686 $ 2,044

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2016
Banking and Thrift [Abstract]
Actual and Required Capital Ratios of Bank	The following tables present actual and required capital ratios as of March 31, 2016 and December 31, 2015 for the Company and the Bank under Basel III Capital Rules. The minimum capital amounts presented include the minimum required capital levels as of March 31, 2016 and December 31, 2015 based on the phased-in provisions of the Basel III Capital Rules and the minimum required capital levels as of January 1, 2019 when the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Minimum Capital Minimum Capital Required to be Required – Basel III Required – Basel III Considered Well Actual Phase-in Schedule Fully Phased In Capitalized Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of March 31, 2016: Total Capital (to Risk Weighted Assets): Consolidated $ 480,710 15.13 % $ 254,246 8.00 % $ 333,698 10.50 % N/A N/A Tri Counties Bank $ 478,390 15.06 % $ 254,110 8.00 % $ 333,519 10.50 % $ 317,637 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 441,847 13.90 % $ 190,684 6.00 % $ 270,136 8.50 % N/A N/A Tri Counties Bank $ 439,527 13.84 % $ 190,582 6.00 % $ 269,992 8.50 % $ 254,110 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 389,322 12.25 % $ 143,013 4.50 % $ 222,465 7.00 % N/A N/A Tri Counties Bank $ 439,527 13.84 % $ 142,937 4.50 % $ 222,346 7.00 % $ 206,464 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 441,847 10.68 % $ 165,442 4.00 % $ 165,442 4.00 % N/A N/A Tri Counties Bank $ 439,527 10.63 % $ 165,438 4.00 % $ 165,438 4.00 % $ 206,798 5.00 % Minimum Capital Minimum Capital Required to be Required – Basel III Required – Basel III Considered Well Actual Phase-in Schedule Fully Phased In Capitalized Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2015: Total Capital (to Risk Weighted Assets): Consolidated $ 474,436 15.09 % $ 251,555 8.00 % $ 330,165 10.50 % N/A N/A Tri Counties Bank $ 473,327 15.06 % $ 251,418 8.00 % $ 329,985 10.50 % $ 314,272 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 435,950 13.86 % $ 188,666 6.00 % $ 267,277 8.50 % N/A N/A Tri Counties Bank $ 434,841 13.84 % $ 188,563 6.00 % $ 267,131 8.50 % $ 251,418 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 385,747 12.27 % $ 141,499 4.50 % $ 220,110 7.00 % N/A N/A Tri Counties Bank $ 434,841 13.84 % $ 141,422 4.50 % $ 219,990 7.00 % $ 204,277 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 435,950 10.79 % $ 161,562 4.00 % $ 161,562 4.00 % N/A N/A Tri Counties Bank $ 434,841 10.76 % $ 161,601 4.00 % $ 161,601 4.00 % $ 202,002 5.00 %

Summary of Quarterly Results 67

Summary of Quarterly Results of Operations (unaudited) (Tables)	3 Months Ended
	Mar. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Results of Operations	The following table sets forth the results of operations for the periods indicated, and is unaudited; however, in the opinion of Management, it reflects all adjustments (which include only normal recurring adjustments) necessary to present fairly the summarized results for such periods. 2016 Quarters Ended December 31, September 30, June 30, March 31, (dollars in thousands, except per share data) Interest and dividend income: Loans: Discount accretion PCI – cash basis $ 269 Discount accretion PCI – other (45 ) Discount accretion PNCI 868 All other loan interest income 33,646 Total loan interest income 34,738 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,056 Total interest income 42,794 Interest expense 1,392 Net interest income 41,402 Provision for loan losses 209 Net interest income after provision for loan losses 41,193 Noninterest income 9,790 Noninterest expense 33,751 Income before income taxes 17,232 Income tax expense 6,558 Net income $ 10,674 Per common share: Net income (diluted) $ 0.46 Dividends $ 0.15 2015 Quarters Ended December 31, September 30, June 30, March 31, (dollars in thousands, except per share data) Interest and dividend income: Loans: Discount accretion PCI – cash basis $ 302 $ 445 $ 404 $ 172 Discount accretion PCI – other 1,392 1,090 907 1,274 Discount accretion PNCI 573 1,590 822 1,348 All other loan interest income 32,571 30,689 29,886 28,371 Total loan interest income 34,838 33,814 32,019 31,165 Debt securities, dividends and interest bearing cash at banks (not FTE) 7,652 7,518 7,848 6,560 Total interest income 42,490 41,332 39,867 37,725 Interest expense 1,349 1,339 1,346 1,382 Net interest income 41,141 39,993 38,521 36,343 (Benefit from) provision for loan losses (908 ) (866 ) (633 ) 197 Net interest income after provision for loan losses 42,049 40,859 39,154 36,146 Noninterest income 11,445 11,642 12,080 10,180 Noninterest expense 34,684 31,439 32,436 32,282 Income before income taxes 18,810 21,062 18,798 14,044 Income tax expense 7,388 8,368 7,432 5,708 Net income $ 11,422 $ 12,694 $ 11,366 $ 8,336 Per common share: Net income (diluted) $ 0.50 $ 0.55 $ 0.49 $ 0.36 Dividends $ 0.15 $ 0.13 $ 0.13 $ 0.11

Summary of Significant Accoun68

Summary of Significant Accounting Policies - Additional Information (Detail)	Mar. 18, 2016USD ($)Branches	Mar. 31, 2016USD ($)BranchesSegmentTrustLocationBusiness	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Significant Of Accounting Policies [Line Items]
Number of subsidiary business trusts | Trust		5
Company's investments in the trusts		$ 1,697,000
Number of business segment | Segment		1
Trading securities		$ 0		$ 0
Recognized OTTI losses		$ 0		$ 0
Loans contractual past due		90 days
TDR loans payment period in nonaccrual status		6 months
Tri Counties Bank [Member]
Significant Of Accounting Policies [Line Items]
Number of locations acquired | Location		3
Number of traditional operating branches | Branches		58
Number of in-store operating branches | Branches		12
Bank of America [Member]
Significant Of Accounting Policies [Line Items]
Number of branches | Branches	3	3
Deposits	$ 161,231,000	$ 161,231,000
California [Member]
Significant Of Accounting Policies [Line Items]
Number of counties | Business		26
Home Equity Lines of Credit [Member]
Significant Of Accounting Policies [Line Items]
Increase in allowance for loan losses due to change in methodology			$ 859,000
Home Equity Loans [Member]
Significant Of Accounting Policies [Line Items]
Increase in allowance for loan losses due to change in methodology			$ 459,000
Furniture and equipment [Member] | Minimum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the related assets or lease terms		3 years
Furniture and equipment [Member] | Maximum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the related assets or lease terms		10 years
Land improvements and buildings [Member] | Minimum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the related assets or lease terms		15 years
Land improvements and buildings [Member] | Maximum [Member]
Significant Of Accounting Policies [Line Items]
Estimated useful lives of the related assets or lease terms		40 years

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	Mar. 18, 2016USD ($)Branches	Mar. 31, 2016USD ($)Branches	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Goodwill recognized		$ 64,311,000	$ 63,462,000
Bank of America [Member]
Business Acquisition [Line Items]
Number of branches | Branches	3	3
Acquisition, completion date	Oct. 28, 2015
Cash consideration	$ 3,204,000
Deposits	161,231,000	$ 161,231,000
Loans	289,000
Cash	159,520,000
Goodwill recognized	849,000
Increase in net book value of land and buildings acquired	309,000
Recognized intangible related to acquisition	2,046,000
Bank of America [Member] | Core deposit intangibles [Member]
Business Acquisition [Line Items]
Recognized intangible related to acquisition	$ 2,046,000
Percentage of acquired intangibles	1.50%
Finite lived intangible asset estimated useful life	7 years

Business Combinations - Schedul

Business Combinations - Schedule of Fair Value of Consideration Transferred, Identifiable Net Assets Acquired and Resulting Goodwill (Detail) - USD ($)	Mar. 18, 2016	Mar. 31, 2016	Dec. 31, 2015
Liabilities assumed:
Goodwill recognized		$ 64,311,000	$ 63,462,000
Bank of America [Member]
Fair value of consideration transferred:
Cash consideration	$ 3,204,000
Total fair value of consideration transferred	3,204,000
Asset acquired:
Cash and cash equivalents	159,520,000
Loans	289,000
Premises and equipment	1,590,000
Core deposit intangible	2,046,000
Other assets	141,000
Total assets acquired	163,586,000
Liabilities assumed:
Deposits	161,231,000	$ 161,231,000
Total liabilities assumed	161,231,000
Total net assets acquired	2,355,000
Goodwill recognized	$ 849,000

Business Combinations - Summary

Business Combinations - Summary of Cash Paid and Estimated Fair Value Adjustments Resulting in Goodwill (Detail) - USD ($) $ in Thousands	Mar. 18, 2016	Mar. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill		$ 64,311	$ 63,462
Bank of America [Member]
Business Acquisition [Line Items]
Cash paid	$ 3,204
Cost basis net assets acquired	0
Goodwill	849
Bank of America [Member] | Premises and equipment [Member]
Business Acquisition [Line Items]
Fair Value Adjustments	(309)
Bank of America [Member] | Core deposit intangibles [Member]
Business Acquisition [Line Items]
Fair Value Adjustments	$ (2,046)

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Values of Investments in Debt and Equity Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 469,184	$ 402,740
Gross Unrealized Gains	8,482	4,189
Gross Unrealized Losses	(212)	(2,044)
Estimated Fair Value	477,454	404,885
Amortized Cost, Held to Maturity	705,133	726,530
Gross Unrealized Gains, Held to Maturity	18,719	8,671
Gross Unrealized Losses, Held to Maturity	(75)	(2,992)
Estimated Fair Value, Held to Maturity	723,777	732,209
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	354,388	312,917
Gross Unrealized Gains	5,903	2,761
Gross Unrealized Losses	(38)	(1,996)
Estimated Fair Value	360,253	313,682
Amortized Cost, Held to Maturity	690,592	711,994
Gross Unrealized Gains, Held to Maturity	18,317	8,394
Gross Unrealized Losses, Held to Maturity	(42)	(2,882)
Estimated Fair Value, Held to Maturity	708,867	717,506
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	111,796	86,823
Gross Unrealized Gains	2,552	1,428
Gross Unrealized Losses	(174)	(33)
Estimated Fair Value	114,174	88,218
Amortized Cost, Held to Maturity	14,541	14,536
Gross Unrealized Gains, Held to Maturity	402	277
Gross Unrealized Losses, Held to Maturity	(33)	(110)
Estimated Fair Value, Held to Maturity	14,910	14,703
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,000	3,000
Gross Unrealized Gains	27
Gross Unrealized Losses		(15)
Estimated Fair Value	$ 3,027	$ 2,985

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)Investmentsecurities	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Investment Securities [Line Items]
Investment securities sold | $	$ 0	$ 0
Investment securities carrying value | $	288,887,000		$ 297,547,000
Mortgage-backed securities | $	$ 1,044,980,000
Life of mortgage-backed securities	4 years 9 months 18 days
Obligations of U.S. Government Corporations and Agencies [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	5
Percentage of aggregate depreciation in unrealized losses	0.17%
Obligations of States and Political Subdivisions [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	15
Percentage of aggregate depreciation in unrealized losses	0.93%
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	0

Investment Securities - Amort74

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Due in one year, Amortized Cost	$ 5
Due after one year through five years, Amortized Cost	13,608
Due after five years through ten years, Amortized Cost	16,948
Due after ten years, Amortized Cost	438,623
Totals, Amortized Cost	469,184
Due in one year, Estimated Fair Value	5
Due after one year through five years, Estimated Fair Value	14,124
Due after five years through ten years, Estimated Fair Value	17,856
Due after ten years, Estimated Fair Value	445,469
Totals, Estimated Fair Value	477,454
Due in one year, Amortized Cost, Held to Maturity	0
Due after one year through five years, Amortized Cost, Held to Maturity	1,154
Due after five years through ten years, Amortized Cost, Held to Maturity	838
Due after ten years, Amortized Cost, Held to Maturity	703,141
Totals, Amortized Cost, Held to Maturity	705,133	$ 726,530
Due in one year, Estimated Fair Value, Held to Maturity	0
Due after one year through five years, Estimated Fair Value, Held to Maturity	1,178
Due after five years through ten years, Estimated Fair Value, Held to Maturity	899
Due after ten years, Estimated Fair Value, Held to Maturity	721,700
Estimated Fair Value, Held to Maturity	$ 723,777	$ 732,209

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses on Investment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 49,585	$ 202,760
Less than 12 months, Unrealized Loss	(202)	(2,044)
12 months or more, Fair Value	2,777
12 months or more, Unrealized Loss	(10)
Total Fair Value	52,362	202,760
Total Unrealized Loss	(212)	(2,044)
Less than 12 months, Fair Value, held to maturity	1,188	198,978
Less than 12 months, Unrealized Loss, held to maturity	(33)	(2,893)
12 months or more, Fair Value, held to maturity	16,025	1,121
12 months or more, Unrealized Loss, held to maturity	(42)	(99)
Total Fair Value, held to maturity	17,213	200,099
Total Unrealized Loss, held to maturity	(75)	(2,992)
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	31,493	193,306
Less than 12 months, Unrealized Loss	(38)	(1,996)
Total Fair Value	31,493	193,306
Total Unrealized Loss	(38)	(1,996)
Less than 12 months, Fair Value, held to maturity		198,481
Less than 12 months, Unrealized Loss, held to maturity		(2,882)
12 months or more, Fair Value, held to maturity	16,205
12 months or more, Unrealized Loss, held to maturity	(42)
Total Fair Value, held to maturity	16,025	198,481
Total Unrealized Loss, held to maturity	(42)	(2,882)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	18,092	6,469
Less than 12 months, Unrealized Loss	(164)	(33)
12 months or more, Fair Value	2,777
12 months or more, Unrealized Loss	(10)
Total Fair Value	20,869	6,469
Total Unrealized Loss	(174)	(33)
Less than 12 months, Fair Value, held to maturity	1,188	497
Less than 12 months, Unrealized Loss, held to maturity	(33)	(11)
12 months or more, Fair Value, held to maturity		1,121
12 months or more, Unrealized Loss, held to maturity		(99)
Total Fair Value, held to maturity	1,188	1,618
Total Unrealized Loss, held to maturity	$ (33)	(110)
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value		2,985
Less than 12 months, Unrealized Loss		(15)
Total Fair Value		2,985
Total Unrealized Loss		$ (15)

Loans - Summary of Loan Balance

Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Mortgage loans on real estate:
Total mortgage loan on real estate	$ 1,828,988	$ 1,811,832
Consumer:
Total consumer loans	387,001	395,283
Commercial	196,557	194,913
Construction:
Total construction	129,001	120,909
Total loans, net of deferred loan fees and discounts	2,541,547	2,522,937	$ 2,320,883
Total principal balance of loans owed, net of charge-offs	2,572,593	2,555,610
Unamortized net deferred loan fees	(5,562)	(6,551)
Discounts to principal balance of loans owed, net of charge-offs	(25,484)	(26,122)
Total loans, net of unamortized deferred loan fees and discounts	2,541,547	2,522,937	2,320,883
Noncovered loans	2,536,791	2,517,702
Covered loans	4,756	5,235
Total loans, net of unamortized deferred loan fees and discounts	2,541,547	2,522,937	2,320,883
Allowance for loan losses	(36,388)	(36,011)	(36,055)	$ (36,585)
Residential 1-4 family [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	315,135	314,265
Home Equity Loans [Member]
Consumer:
Total consumer loans	41,365	40,362
Construction:
Total loans, net of deferred loan fees and discounts	41,365	40,362	32,486
Total loans, net of unamortized deferred loan fees and discounts	41,365	40,362	32,486
Total loans, net of unamortized deferred loan fees and discounts	41,365	40,362	32,486
Allowance for loan losses	(3,111)	(3,138)	(1,980)	(1,797)
Other [Member]
Consumer:
Total consumer loans	32,945	32,429
Commercial [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	1,513,853	1,497,567
Construction:
Total construction	76,018	74,774
Home Equity Lines of Credit [Member]
Consumer:
Total consumer loans	312,691	322,492
Construction:
Total loans, net of deferred loan fees and discounts	312,691	322,492	345,210
Total loans, net of unamortized deferred loan fees and discounts	312,691	322,492	345,210
Total loans, net of unamortized deferred loan fees and discounts	312,691	322,492	345,210
Allowance for loan losses	(9,907)	(11,253)	$ (15,233)	$ (15,676)
Residential [Member]
Construction:
Total construction	52,983	46,135
Originated [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	1,422,103	1,371,228
Consumer:
Total consumer loans	342,828	349,134
Commercial	174,505	170,320
Construction:
Total construction	107,059	98,063
Total loans, net of deferred loan fees and discounts	2,046,495	1,988,745
Total principal balance of loans owed, net of charge-offs	2,052,057	1,995,296
Unamortized net deferred loan fees	(5,562)	(6,551)
Total loans, net of unamortized deferred loan fees and discounts	2,046,495	1,988,745
Noncovered loans	2,046,495	1,988,745
Total loans, net of unamortized deferred loan fees and discounts	2,046,495	1,988,745
Allowance for loan losses	(31,168)	(31,271)
Originated [Member] | Residential 1-4 family [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	212,382	207,585
Originated [Member] | Home Equity Loans [Member]
Consumer:
Total consumer loans	35,712	34,717
Originated [Member] | Other [Member]
Consumer:
Total consumer loans	29,863	28,998
Originated [Member] | Commercial [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	1,209,721	1,163,643
Construction:
Total construction	68,311	66,285
Originated [Member] | Home Equity Lines of Credit [Member]
Consumer:
Total consumer loans	277,253	285,419
Originated [Member] | Residential [Member]
Construction:
Total construction	38,748	31,778
PNCI [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	388,060	415,399
Consumer:
Total consumer loans	35,182	36,720
Commercial	17,521	19,744
Construction:
Total construction	21,230	22,125
Total loans, net of deferred loan fees and discounts	461,993	493,988
Total principal balance of loans owed, net of charge-offs	475,095	507,935
Discounts to principal balance of loans owed, net of charge-offs	(13,102)	(13,947)
Total loans, net of unamortized deferred loan fees and discounts	461,993	493,988
Noncovered loans	461,993	493,988
Total loans, net of unamortized deferred loan fees and discounts	461,993	493,988
Allowance for loan losses	(2,222)	(1,848)
PNCI [Member] | Residential 1-4 family [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	101,117	104,535
PNCI [Member] | Home Equity Loans [Member]
Consumer:
Total consumer loans	4,016	4,018
PNCI [Member] | Other [Member]
Consumer:
Total consumer loans	3,018	3,367
PNCI [Member] | Commercial [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	286,943	310,864
Construction:
Total construction	7,707	8,489
PNCI [Member] | Home Equity Lines of Credit [Member]
Consumer:
Total consumer loans	28,148	29,335
PNCI [Member] | Residential [Member]
Construction:
Total construction	13,523	13,636
PCI - Cash basis [Member]
Consumer:
Total consumer loans	4,771	5,078
Commercial		1
Construction:
Total loans, net of deferred loan fees and discounts	4,771	5,079
Total principal balance of loans owed, net of charge-offs	12,085	12,686
Discounts to principal balance of loans owed, net of charge-offs	(7,314)	(7,607)
Total loans, net of unamortized deferred loan fees and discounts	4,771	5,079
Noncovered loans	4,771	5,079
Total loans, net of unamortized deferred loan fees and discounts	4,771	5,079
Allowance for loan losses	(118)	(121)
PCI - Cash basis [Member] | Home Equity Loans [Member]
Consumer:
Total consumer loans	124	124
PCI - Cash basis [Member] | Home Equity Lines of Credit [Member]
Consumer:
Total consumer loans	4,647	4,954
PCI - Other [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	18,825	25,205
Consumer:
Total consumer loans	4,220	4,351
Commercial	4,531	4,848
Construction:
Total construction	712	721
Total loans, net of deferred loan fees and discounts	28,288	35,125
Total principal balance of loans owed, net of charge-offs	33,356	39,693
Discounts to principal balance of loans owed, net of charge-offs	(5,068)	(4,568)
Total loans, net of unamortized deferred loan fees and discounts	28,288	35,125
Noncovered loans	23,532	29,890
Covered loans	4,756	5,235
Total loans, net of unamortized deferred loan fees and discounts	28,288	35,125
Allowance for loan losses	(2,880)	(2,771)
PCI - Other [Member] | Residential 1-4 family [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	1,636	2,145
PCI - Other [Member] | Home Equity Loans [Member]
Consumer:
Total consumer loans	1,513	1,503
PCI - Other [Member] | Other [Member]
Consumer:
Total consumer loans	64	64
PCI - Other [Member] | Commercial [Member]
Mortgage loans on real estate:
Total mortgage loan on real estate	17,189	23,060
PCI - Other [Member] | Home Equity Lines of Credit [Member]
Consumer:
Total consumer loans	2,643	2,784
PCI - Other [Member] | Residential [Member]
Construction:
Total construction	$ 712	$ 721

Loans - Change in Accretable Yi

Loans - Change in Accretable Yield for PCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Change in accretable yield:
Balance at beginning of period	$ 13,255	$ 14,159
Accretion to interest income	(1,091)	(1,818)
Reclassification (to) from nonaccretable difference	(184)	1,061
Balance at end of period	$ 11,980	$ 13,402

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Activity in Allowance for Loan Losses, and Ending Balance of Loans, Net of Unearned Fees for Periods Indicated (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 2,541,547	$ 2,320,883	$ 2,522,937
Individ. evaluated for impairment	31,338	65,026	50,105
Loans pooled for evaluation	2,477,150	2,206,306	2,432,628
Loans acquired with Deteriorated credit quality	33,059	49,551	40,204
Beginning balance	36,011	36,585	36,585
Charge-offs	(1,289)	(1,235)	(2,816)
Recoveries	1,457	508	4,452
(Benefit) provision	209	197	(2,210)
Ending balance	36,388	36,055	36,011
Ending balance:
Individ. evaluated for impairment	3,720	4,692	2,890
Loans pooled for evaluation	29,670	28,265	30,228
Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	312,691	345,210	322,492
Individ. evaluated for impairment	5,994	6,290	5,747
Loans pooled for evaluation	299,407	329,961	309,007
Loans acquired with Deteriorated credit quality	7,290	8,959	7,738
Beginning balance	11,253	15,676	15,676
Charge-offs	(214)	(341)	(694)
Recoveries	281	119	666
(Benefit) provision	(1,413)	(221)	(4,395)
Ending balance	9,907	15,233	11,253
Ending balance:
Individ. evaluated for impairment	705	1,857	605
Loans pooled for evaluation	9,083	12,932	10,423
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	32,945	32,999	32,429
Individ. evaluated for impairment	300	338	288
Loans pooled for evaluation	32,581	32,591	32,077
Loans acquired with Deteriorated credit quality	64	70	64
Beginning balance	688	719	719
Charge-offs	(207)	(268)	(972)
Recoveries	130	152	500
(Benefit) provision	76	41	441
Ending balance	687	644	688
Ending balance:
Individ. evaluated for impairment	84	92	74
Loans pooled for evaluation	603	552	614
Construction [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	52,983	40,105	46,135
Individ. evaluated for impairment		2,655	4
Loans pooled for evaluation	52,271	36,714	45,410
Loans acquired with Deteriorated credit quality	712	736	721
Beginning balance	899	1,434	1,434
Recoveries		11	1,728
(Benefit) provision	167	(695)	(2,263)
Ending balance	1,066	750	899
Ending balance:
Individ. evaluated for impairment		59
Loans pooled for evaluation	1,014	505	844
Construction [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	76,018	45,648	74,774
Individ. evaluated for impairment		94	490
Loans pooled for evaluation	76,018	45,554	74,284
Beginning balance	812	411	411
Recoveries	1	19	140
(Benefit) provision	5	(180)	261
Ending balance	818	250	812
Ending balance:
Loans pooled for evaluation	818	250	812
C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	196,557	177,540	194,913
Individ. evaluated for impairment	3,871	1,967	2,671
Loans pooled for evaluation	188,155	168,517	187,393
Loans acquired with Deteriorated credit quality	4,531	7,056	4,849
Beginning balance	5,271	4,226	4,226
Charge-offs	(38)	(534)	(680)
Recoveries	177	87	677
(Benefit) provision	729	197	1,048
Ending balance	6,139	3,976	5,271
Ending balance:
Individ. evaluated for impairment	1,934	559	1,187
Loans pooled for evaluation	3,053	2,205	2,983
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	41,365	32,486	40,362
Individ. evaluated for impairment	1,928	1,359	1,731
Loans pooled for evaluation	37,800	30,374	37,004
Loans acquired with Deteriorated credit quality	1,637	753	1,627
Beginning balance	3,138	1,797	1,797
Charge-offs		(11)	(242)
Recoveries	49	3	252
(Benefit) provision	(76)	191	1,331
Ending balance	3,111	1,980	3,138
Ending balance:
Individ. evaluated for impairment	248	337	294
Loans pooled for evaluation	2,864	1,643	2,844
Auto Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		32
Individ. evaluated for impairment		14
Loans pooled for evaluation		18
Beginning balance		9	9
Charge-offs			(4)
Recoveries		20	42
(Benefit) provision		(23)	(47)
Ending balance		6
Ending balance:
Individ. evaluated for impairment		1
Loans pooled for evaluation		5
RE Mortgage [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	315,135	282,383	314,265
Individ. evaluated for impairment	7,015	7,786	6,767
Loans pooled for evaluation	306,484	270,571	305,353
Loans acquired with Deteriorated credit quality	1,636	4,026	2,145
Beginning balance	2,507	3,086	3,086
Charge-offs	(37)	(81)	(224)
Recoveries	2	1	204
(Benefit) provision	293	(241)	(559)
Ending balance	2,765	2,765	2,507
Ending balance:
Individ. evaluated for impairment	454	988	335
Loans pooled for evaluation	2,094	1,709	2,112
RE Mortgage [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,513,853	1,364,480	1,497,567
Individ. evaluated for impairment	12,230	44,523	32,407
Loans pooled for evaluation	1,484,434	1,292,006	1,442,100
Loans acquired with Deteriorated credit quality	17,189	27,951	23,060
Beginning balance	11,443	9,227	9,227
Charge-offs	(793)
Recoveries	817	96	243
(Benefit) provision	428	1,128	1,973
Ending balance	11,895	10,451	11,443
Ending balance:
Individ. evaluated for impairment	295	799	395
Loans pooled for evaluation	10,141	8,464	9,596
Receivables Acquired with Deteriorated Credit Quality [Member]
Ending balance:
Loans acquired with deteriorated credit quality	2,998	3,098	2,893
Receivables Acquired with Deteriorated Credit Quality [Member] | Home Equity Lines of Credit [Member]
Ending balance:
Loans acquired with deteriorated credit quality	117	443	225
Receivables Acquired with Deteriorated Credit Quality [Member] | Construction [Member] | Residential [Member]
Ending balance:
Loans acquired with deteriorated credit quality	52	186	55
Receivables Acquired with Deteriorated Credit Quality [Member] | C&I [Member]
Ending balance:
Loans acquired with deteriorated credit quality	1,153	1,212	1,101
Receivables Acquired with Deteriorated Credit Quality [Member] | RE Mortgage [Member] | Residential [Member]
Ending balance:
Loans acquired with deteriorated credit quality	217	69	60
Receivables Acquired with Deteriorated Credit Quality [Member] | RE Mortgage [Member] | Commercial [Member]
Ending balance:
Loans acquired with deteriorated credit quality	$ 1,459	$ 1,188	$ 1,452

Allowance for Loan Losses - Pre

Allowance for Loan Losses - Presentation of Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 2,541,547	$ 2,522,937	$ 2,320,883
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	52,983	46,135	40,105
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	76,018	74,774	45,648
Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	312,691	322,492	345,210
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	32,945	32,429	32,999
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,046,495	1,988,745
Originated Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	38,748	31,778
Originated Loans [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	68,311	66,285
Originated Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	277,253	285,419
Originated Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	29,863	28,998
PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	461,993	493,988
PNCI Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	13,523	13,636
PNCI Loans [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	7,707	8,489
PNCI Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	28,148	29,335
PNCI Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	3,018	3,367
PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	33,059	40,204
PCI Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	712	721
PCI Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	7,290	7,738
PCI Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	64	64
C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	196,557	194,913	177,540
C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	174,505	170,320
C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	17,521	19,744
C&I [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	4,531	4,849
Pass [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,993,763	1,918,006
Pass [Member] | Originated Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	38,414	31,440
Pass [Member] | Originated Loans [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	68,311	66,285
Pass [Member] | Originated Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	267,767	275,251
Pass [Member] | Originated Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	29,237	28,339
Pass [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	438,451	472,952
Pass [Member] | PNCI Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	13,523	13,636
Pass [Member] | PNCI Loans [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	7,707	8,489
Pass [Member] | PNCI Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	26,632	27,378
Pass [Member] | PNCI Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,829	3,164
Pass [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	168,284	166,559
Pass [Member] | C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	17,252	19,666
Special Mention [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	20,835	17,646
Special Mention [Member] | Originated Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	334	334
Special Mention [Member] | Originated Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,760	2,494
Special Mention [Member] | Originated Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	459	415
Special Mention [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	12,692	11,994
Special Mention [Member] | PNCI Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	410	445
Special Mention [Member] | PNCI Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	62	74
Special Mention [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	3,517	1,037
Substandard [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	31,897	53,093
Substandard [Member] | Originated Loans [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		4
Substandard [Member] | Originated Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	6,726	7,674
Substandard [Member] | Originated Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	167	244
Substandard [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	10,850	9,042
Substandard [Member] | PNCI Loans [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,106	1,512
Substandard [Member] | PNCI Loans [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	127	129
Substandard [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,704	2,724
Substandard [Member] | C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	269	78
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	41,365	40,362	32,486
Home Equity Loans [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	35,712	34,717
Home Equity Loans [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	4,016	4,018
Home Equity Loans [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,637	1,627
Home Equity Loans [Member] | Pass [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	31,962	31,427
Home Equity Loans [Member] | Pass [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	3,791	3,789
Home Equity Loans [Member] | Special Mention [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,104	1,027
Home Equity Loans [Member] | Special Mention [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	77	80
Home Equity Loans [Member] | Substandard [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,646	2,263
Home Equity Loans [Member] | Substandard [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	148	149
RE Mortgage [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	315,135	314,265	282,383
RE Mortgage [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,513,853	1,497,567	$ 1,364,480
RE Mortgage [Member] | Originated Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	212,382	207,585
RE Mortgage [Member] | Originated Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,209,721	1,163,643
RE Mortgage [Member] | PNCI Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	101,117	104,535
RE Mortgage [Member] | PNCI Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	286,943	310,864
RE Mortgage [Member] | PCI Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,636	2,145
RE Mortgage [Member] | PCI Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	17,189	23,060
RE Mortgage [Member] | Pass [Member] | Originated Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	204,764	199,837
RE Mortgage [Member] | Pass [Member] | Originated Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,185,024	1,118,868
RE Mortgage [Member] | Pass [Member] | PNCI Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	99,140	102,895
RE Mortgage [Member] | Pass [Member] | PNCI Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	267,577	293,935
RE Mortgage [Member] | Special Mention [Member] | Originated Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,178	2,018
RE Mortgage [Member] | Special Mention [Member] | Originated Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	10,483	10,321
RE Mortgage [Member] | Special Mention [Member] | PNCI Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	593	600
RE Mortgage [Member] | Special Mention [Member] | PNCI Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	11,550	10,795
RE Mortgage [Member] | Substandard [Member] | Originated Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	5,440	5,730
RE Mortgage [Member] | Substandard [Member] | Originated Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	14,214	34,454
RE Mortgage [Member] | Substandard [Member] | PNCI Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,384	1,040
RE Mortgage [Member] | Substandard [Member] | PNCI Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 7,816	$ 6,134

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)Category	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of categories occupied under commercial real estate loans | Category	2
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired TDRs Loans	$ 15,921,000	$ 29,269,000	$ 45,641,000
Additional funds in TDRs	15,000	35,000	4,000
PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired TDRs Loans	1,792,000	1,396,000	1,231,000
Obligations to lend additional funds on TDRs	$ 0	$ 0	$ 0
Minimum [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Period of collateral payment of loan	3 months
Maximum [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Period of collateral payment of loan	12 months

Allowance for Loan Losses - Ana

Allowance for Loan Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 6,830	$ 10,172
Current	2,039,665	1,978,573
Total orig. loans	2,046,495	1,988,745
> 90 Days and still accruing	0	0
Nonaccrual loans	12,659	22,824
PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,222	8,924
Current	459,771	485,064
Total orig. loans	461,993	493,988
> 90 Days and still accruing	0	0
Nonaccrual loans	4,093	5,398
Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,669
Current	275,584
Total orig. loans	277,253
> 90 Days and still accruing	0
Nonaccrual loans	3,383
Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	18
Current	28,130
Total orig. loans	28,148
> 90 Days and still accruing	0
Nonaccrual loans	539
Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	90
Current	29,773
Total orig. loans	29,863
> 90 Days and still accruing	0
Nonaccrual loans	11
Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	13
Current	3,005
Total orig. loans	3,018
> 90 Days and still accruing	0
Nonaccrual loans	31
C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,279	2,221
Current	173,226	168,099
Total orig. loans	174,505	170,320
> 90 Days and still accruing	0	0
Nonaccrual loans	2,204	976
C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1
Current	17,521	19,743
Total orig. loans	17,521	19,744
> 90 Days and still accruing	0	0
30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,580	4,635
30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,643	7,259
30-59 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,076
30-59 Days [Member] | Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	59
30-59 Days [Member] | Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4
30-59 Days [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	290	2,197
30-59 Days [Member] | C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1
60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,021	1,196
60-89 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		13
60-89 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	237
60-89 Days [Member] | Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	20
60-89 Days [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	195
> 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,229	4,341
> 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	579	1,652
> 90 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	356
> 90 Days [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	18
> 90 Days [Member] | Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	11
> 90 Days [Member] | Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	9
> 90 Days [Member] | C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	794	24
Home Equity Loans [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,292	825
Current	34,420	33,892
Total orig. loans	35,712	34,717
> 90 Days and still accruing	0	0
Nonaccrual loans	1,292	1,195
Home Equity Loans [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	131	94
Current	3,885	3,924
Total orig. loans	4,016	4,018
> 90 Days and still accruing	0	0
Nonaccrual loans	108	109
Home Equity Loans [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	641	402
Home Equity Loans [Member] | 30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	60	23
Home Equity Loans [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	497	341
Home Equity Loans [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	154	82
Home Equity Loans [Member] | > 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	71	71
Auto Indirect [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
> 90 Days and still accruing	0	0
Auto Indirect [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
> 90 Days and still accruing	0	0
Construction [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,748	31,778
Total orig. loans	38,748	31,778
> 90 Days and still accruing	0	0
Nonaccrual loans	12	12
Construction [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	13,523	13,636
Total orig. loans	13,523	13,636
> 90 Days and still accruing	0	0
Construction [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	68,311	66,285
Total orig. loans	68,311	66,285
> 90 Days and still accruing	0	0
Construction [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	56	490
Current	7,651	7,999
Total orig. loans	7,707	8,489
> 90 Days and still accruing	0	0
Nonaccrual loans		490
Construction [Member] | 30-59 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	56
Construction [Member] | > 90 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		490
RE Mortgage [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,361	1,062
Current	211,021	206,523
Total orig. loans	212,382	207,585
> 90 Days and still accruing	0	0
Nonaccrual loans	2,963	3,045
RE Mortgage [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,924	3,164
Current	99,193	101,371
Total orig. loans	101,117	104,535
> 90 Days and still accruing	0	0
Nonaccrual loans	679	348
RE Mortgage [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,139	4,116
Current	1,208,582	1,159,527
Total orig. loans	1,209,721	1,163,643
> 90 Days and still accruing	0	0
Nonaccrual loans	2,794	14,196
RE Mortgage [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	80	4,785
Current	286,863	306,079
Total orig. loans	286,943	310,864
> 90 Days and still accruing	0	0
Nonaccrual loans	2,736	3,742
RE Mortgage [Member] | 30-59 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,018	791
RE Mortgage [Member] | 30-59 Days [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,523	3,106
RE Mortgage [Member] | 30-59 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	496	200
RE Mortgage [Member] | 30-59 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		4,037
RE Mortgage [Member] | 60-89 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	72
RE Mortgage [Member] | 60-89 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		491
RE Mortgage [Member] | > 90 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	271	271
RE Mortgage [Member] | > 90 Days [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	401	58
RE Mortgage [Member] | > 90 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	643	3,425
RE Mortgage [Member] | > 90 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 80	748
Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,877
Current		283,542
Total orig. loans		285,419
> 90 Days and still accruing		0
Nonaccrual loans		3,379
Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		367
Current		28,968
Total orig. loans		29,335
> 90 Days and still accruing		0
Nonaccrual loans		676
Home Equity Lines of Credit [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,033
Home Equity Lines of Credit [Member] | 30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		92
Home Equity Lines of Credit [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		324
Home Equity Lines of Credit [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		520
Home Equity Lines of Credit [Member] | > 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		275
Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		71
Current		28,927
Total orig. loans		28,998
> 90 Days and still accruing		0
Nonaccrual loans		21
Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		23
Current		3,344
Total orig. loans		3,367
> 90 Days and still accruing		0
Nonaccrual loans		33
Other Consumer [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		12
Other Consumer [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		40
Other Consumer [Member] | 60-89 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		13
Other Consumer [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		19
Other Consumer [Member] | > 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		$ 10

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	$ 16,865	$ 50,199	$ 35,505
Unpaid principal, With no related allowance recorded	23,001	63,954	43,892
Average recorded Investment, With no related allowance recorded	26,185	49,332	41,984
Interest income Recognized, With no related allowance recorded	109	302	1,031
Recorded investment, With an allowance recorded	8,752	11,498	7,917
Unpaid principal, With an allowance recorded	9,010	12,302	8,249
Related allowance, With an allowance recorded	3,155	4,122	2,450
Average recorded Investment, With an allowance recorded	8,334	11,260	9,469
Interest income Recognized, With an allowance recorded	76	94	302
PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	2,126	1,205	3,056
Unpaid principal, With no related allowance recorded	2,311	3,647	3,277
Average recorded Investment, With no related allowance recorded	2,592	1,164	2,090
Interest income Recognized, With no related allowance recorded	2	1	87
Recorded investment, With an allowance recorded	3,595	2,124	3,627
Unpaid principal, With an allowance recorded	3,708	2,136	3,744
Related allowance, With an allowance recorded	565	570	440
Average recorded Investment, With an allowance recorded	3,611	1,879	2,631
Interest income Recognized, With an allowance recorded	14	18	174
C&I [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	520	748	576
Unpaid principal, With no related allowance recorded	635	776	688
Average recorded Investment, With no related allowance recorded	548	580	494
Interest income Recognized, With no related allowance recorded	7	11	29
Recorded investment, With an allowance recorded	3,351	1,214	2,094
Unpaid principal, With an allowance recorded	3,376	1,316	2,117
Related allowance, With an allowance recorded	1,934	559	1,187
Average recorded Investment, With an allowance recorded	2,722	1,276	1,716
Interest income Recognized, With an allowance recorded	34	15	122
C&I [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded		5	1
Unpaid principal, With no related allowance recorded		5	1
Average recorded Investment, With no related allowance recorded	1	6	4
Home Equity Loans [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	1,154	870	947
Unpaid principal, With no related allowance recorded	1,598	1,335	1,349
Average recorded Investment, With no related allowance recorded	1,051	810	848
Interest income Recognized, With no related allowance recorded	3		5
Recorded investment, With an allowance recorded	666	464	674
Unpaid principal, With an allowance recorded	696	566	701
Related allowance, With an allowance recorded	248	337	256
Average recorded Investment, With an allowance recorded	670	484	589
Interest income Recognized, With an allowance recorded	5	1	26
Home Equity Loans [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	108	25	71
Unpaid principal, With no related allowance recorded	112	25	73
Average recorded Investment, With no related allowance recorded	89	25	48
Interest income Recognized, With no related allowance recorded			2
Recorded investment, With an allowance recorded			39
Unpaid principal, With an allowance recorded			40
Related allowance, With an allowance recorded			39
Average recorded Investment, With an allowance recorded	19		19
Auto Indirect [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	1	10
Unpaid principal, With no related allowance recorded	10	30
Average recorded Investment, With no related allowance recorded	2	12
Recorded investment, With an allowance recorded		4
Unpaid principal, With an allowance recorded		6
Related allowance, With an allowance recorded		1
Average recorded Investment, With an allowance recorded		4
Construction [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded		2,373	4
Unpaid principal, With no related allowance recorded	63	6,585	65
Average recorded Investment, With no related allowance recorded	2	2,387	1,202
Recorded investment, With an allowance recorded		282
Unpaid principal, With an allowance recorded		282
Related allowance, With an allowance recorded		59
Average recorded Investment, With an allowance recorded		282	141
Interest income Recognized, With an allowance recorded		4
Construction [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded		94
Unpaid principal, With no related allowance recorded		186
Average recorded Investment, With no related allowance recorded		96	50
Construction [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded			490
Unpaid principal, With no related allowance recorded			490
Average recorded Investment, With no related allowance recorded	245		245
Interest income Recognized, With no related allowance recorded			18
RE Mortgage [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	3,806	3,360	3,886
Unpaid principal, With no related allowance recorded	5,963	5,330	5,998
Average recorded Investment, With no related allowance recorded	3,846	3,323	3,586
Interest income Recognized, With no related allowance recorded	19	8	81
Recorded investment, With an allowance recorded	1,991	3,402	2,006
Unpaid principal, With an allowance recorded	2,065	3,570	2,073
Related allowance, With an allowance recorded	324	915	335
Average recorded Investment, With an allowance recorded	1,998	3,063	2,365
Interest income Recognized, With an allowance recorded	13	22	49
RE Mortgage [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	604	389	875
Unpaid principal, With no related allowance recorded	643	488	908
Average recorded Investment, With no related allowance recorded	740	366	609
Interest income Recognized, With no related allowance recorded	2	1	31
Recorded investment, With an allowance recorded	614	635
Unpaid principal, With an allowance recorded	614	644
Related allowance, With an allowance recorded	130	73
Average recorded Investment, With an allowance recorded	307	734	417
Interest income Recognized, With an allowance recorded	2	2
RE Mortgage [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	7,917	40,094	27,109
Unpaid principal, With no related allowance recorded	8,393	43,898	29,678
Average recorded Investment, With no related allowance recorded	17,513	39,286	32,793
Interest income Recognized, With no related allowance recorded	72	283	893
Recorded investment, With an allowance recorded	1,440	3,281	1,418
Unpaid principal, With an allowance recorded	1,480	3,432	1,453
Related allowance, With an allowance recorded	175	598	146
Average recorded Investment, With an allowance recorded	1,429	3,112	2,180
Interest income Recognized, With an allowance recorded	20	40	74
RE Mortgage [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	844	313	1,132
Unpaid principal, With no related allowance recorded	908	2,601	1,248
Average recorded Investment, With no related allowance recorded	988	339	749
Interest income Recognized, With no related allowance recorded			32
Recorded investment, With an allowance recorded	2,029	835	2,748
Unpaid principal, With an allowance recorded	2,142	838	2,858
Related allowance, With an allowance recorded	120	201	248
Average recorded Investment, With an allowance recorded	2,389	490	1,447
Interest income Recognized, With an allowance recorded	2	10	149
Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	3,457	2,631	2,963
Unpaid principal, With no related allowance recorded	6,325	5,791	6,079
Average recorded Investment, With no related allowance recorded	3,210	2,816	2,982
Interest income Recognized, With no related allowance recorded	8		23
Recorded investment, With an allowance recorded	1,304	2,808	1,724
Unpaid principal, With an allowance recorded	1,393	3,077	1,904
Related allowance, With an allowance recorded	474	1,636	525
Average recorded Investment, With an allowance recorded	1,514	2,997	2,455
Interest income Recognized, With an allowance recorded	4	12	31
Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	539	414	454
Unpaid principal, With no related allowance recorded	597	450	505
Average recorded Investment, With no related allowance recorded	497	380	400
Interest income Recognized, With no related allowance recorded			3
Recorded investment, With an allowance recorded	694	437	606
Unpaid principal, With an allowance recorded	694	437	612
Related allowance, With an allowance recorded	231	221	80
Average recorded Investment, With an allowance recorded	650	436	521
Interest income Recognized, With an allowance recorded	7	4	14
Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	10	19	20
Unpaid principal, With no related allowance recorded	14	23	35
Average recorded Investment, With no related allowance recorded	13	22	29
Recorded investment, With an allowance recorded		43	1
Unpaid principal, With an allowance recorded		53	1
Related allowance, With an allowance recorded		17	1
Average recorded Investment, With an allowance recorded	1	42	23
Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, With no related allowance recorded	31	59	33
Unpaid principal, With no related allowance recorded	51	78	52
Average recorded Investment, With no related allowance recorded	32	48	35
Interest income Recognized, With no related allowance recorded			1
Recorded investment, With an allowance recorded	258	217	234
Unpaid principal, With an allowance recorded	258	217	234
Related allowance, With an allowance recorded	84	75	73
Average recorded Investment, With an allowance recorded	246	219	227
Interest income Recognized, With an allowance recorded	$ 3	$ 2	$ 11

Allowance for Loan Losses - Tro

Allowance for Loan Losses - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)SecurityLoan	Mar. 31, 2015USD ($)SecurityLoan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan	5	5
Pre-mod outstanding principal balance	$ 327	$ 608
Post-mod outstanding principal balance	364	611
Financial impact due to TDR taken as additional provision	27	$ 172
Number that defaulted during the period | SecurityLoan		1
Recorded investment of TDRs that defaulted during the period		$ 47
The default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan	1
Pre-mod outstanding principal balance	$ 132
Post-mod outstanding principal balance	132
Financial impact due to TDR taken as additional provision	19
Number that defaulted during the period | SecurityLoan		1
Recorded investment of TDRs that defaulted during the period		$ 47
The default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan	1	1
Pre-mod outstanding principal balance	$ 12	$ 287
Post-mod outstanding principal balance	12	288
Financial impact due to TDR taken as additional provision	8	164
The default of previous TDR taken as charge-offs or additional provisions	$ 0	0
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan	1
Pre-mod outstanding principal balance	$ 105
Post-mod outstanding principal balance	105
The default of previous TDR taken as charge-offs or additional provisions	0	0
Auto Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
The default of previous TDR taken as charge-offs or additional provisions	0	0
Construction [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
The default of previous TDR taken as charge-offs or additional provisions	0	0
Construction [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
The default of previous TDR taken as charge-offs or additional provisions	0	$ 0
RE Mortgage [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan		1
Pre-mod outstanding principal balance		$ 108
Post-mod outstanding principal balance		110
Financial impact due to TDR taken as additional provision		8
The default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
RE Mortgage [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan	2	1
Pre-mod outstanding principal balance	$ 78	$ 124
Post-mod outstanding principal balance	115	124
Financial impact due to TDR taken as additional provision		(5)
The default of previous TDR taken as charge-offs or additional provisions	0	$ 0
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number | SecurityLoan		2
Pre-mod outstanding principal balance		$ 89
Post-mod outstanding principal balance		89
Financial impact due to TDR taken as additional provision		5
The default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0

Foreclosed Assets - Summary of

Foreclosed Assets - Summary of Activity in Balance of Foreclosed Assets (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Assets	Mar. 31, 2015USD ($)Assets
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net	$ 5,369	$ 4,894
Additions/transfers from loans	416	1,560
Dispositions/sales	(1,325)	(495)
Valuation adjustments	11	(67)
Ending balance, net	4,471	5,892
Ending valuation allowance	$ 572	$ 263
Ending number of foreclosed assets | Assets	21	30
Proceeds from sale of foreclosed assets	$ 1,417	$ 806
Gain on sale of foreclosed assets	92	311
Noncovered [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net	5,369	4,449
Additions/transfers from loans	416	1,560
Dispositions/sales	(1,325)	(495)
Valuation adjustments	11	(67)
Ending balance, net	4,471	5,447
Ending valuation allowance	$ 572	$ 263
Ending number of foreclosed assets | Assets	21	29
Proceeds from sale of foreclosed assets	$ 1,417	$ 806
Gain on sale of foreclosed assets	$ 92	311
Covered [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net		445
Ending balance, net		$ 445
Ending number of foreclosed assets | Assets		1

Foreclosed Assets - Additional

Foreclosed Assets - Additional Information (Detail) - USD ($)	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Foreclosed Assets Activity [Line Items]
Foreclosed assets	$ 4,471,000	$ 5,369,000	$ 5,892,000	$ 4,894,000
Residential Real Estate [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Foreclosed assets	1,926,000
Formal foreclosure proceedings	$ 444,000

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment, Net, by Type [Abstract]
Land & land improvements	$ 11,051	$ 8,909
Buildings	46,245	38,643
Furniture and equipment	27,130	31,081
Premises and equipment, gross	84,426	78,633
Less: Accumulated depreciation	(33,053)	(35,518)
Premises and equipment less depreciation, gross	51,373	43,115
Construction in progress	149	696
Total premises and equipment	$ 51,522	$ 43,811

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation expense for premises and equipment	$ 1,271,000	$ 1,268,000

Cash Value of Life Insurance -

Cash Value of Life Insurance - Summary of Activity in Balance of Cash Value of Life Insurance (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)PoliciesEmployeesCompany	Mar. 31, 2015USD ($)PoliciesEmployeesCompany
Increase (Decrease) in Insurance Liabilities [Abstract]
Beginning balance	$ 94,560	$ 92,337
Increase in cash value of life insurance	696	675
Ending balance	95,256	93,012
End of period death benefit	$ 166,216	$ 165,847
Number of policies owned | Policies	187	189
Insurance companies used | Company	14	14
Current and former employees and directors covered | Employees	59	60

Cash Value of Life Insurance 89

Cash Value of Life Insurance - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016PoliciesCompany	Mar. 31, 2015Company
Insurance [Abstract]
Number of life insurance policies owned by the Company	187
Insurance companies used | Company	14	14
Policies covering current and former employees and directors	59

Goodwill and Other Intangible90

Goodwill and Other Intangible Assets - Summary of Goodwill Intangible (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Ending Balance	$ 64,311
Goodwill, Additions	849
Goodwill, Reductions	0
Goodwill, Beginning Balance	$ 63,462

Goodwill and Other Intangible91

Goodwill and Other Intangible Assets - Summary of Core Deposit Intangibles (Detail) - Core deposit intangibles [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Finite-Lived Intangible Assets [Line Items]
Core deposit intangibles, Beginning balance	$ 10,120
Core deposit intangibles, Reductions/Amortization	0
Core deposit intangibles, Additions	2,046
Core deposit intangibles, Ending balance	8,074
Accumulated amortization, Beginning balance	(2,479)
Accumulated amortization, Reductions/Amortization	(299)
Accumulated amortization, Additions	0
Accumulated amortization, Ending balance	(2,180)
Core deposit intangibles, net, Beginning balance	7,641
Core deposit intangibles, net, Reductions/Amortization	(299)
Core deposit intangibles, net, Additions	2,046
Core deposit intangibles, net, Ending balance	$ 5,894

Goodwill and Other Intangible92

Goodwill and Other Intangible Assets - Additional Information (Detail)	Mar. 18, 2016USD ($)Branches	Mar. 31, 2016Branches	Oct. 03, 2014USD ($)	Sep. 23, 2011USD ($)	May. 28, 2010USD ($)
Bank of America [Member]
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles	$ 2,046,000
Number of branches | Branches	3	3
North Valley Bancorp [Member]
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles			$ 6,614,000
Citizens [Member]
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles				$ 898,000
Granite [Member]
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles					$ 562,000

Goodwill and Other Intangible93

Goodwill and Other Intangible Assets - Estimated Core Deposit Intangible Amortization (Detail) - Core deposit intangibles [Member] $ in Thousands	Mar. 31, 2016USD ($)
Finite-Lived Intangible Assets [Line Items]
2,016	$ 1,377
2,017	1,389
2,018	1,324
2,019	1,228
2,020	1,228
Thereafter	$ 1,095

Mortgage Servicing Rights - Fai

Mortgage Servicing Rights - Fair Value of Mortgage Servicing Rights (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Servicing Assets at Fair Value [Line Items]
Contractually specified servicing fees, late fees and ancillary fees earned	$ 517	$ 534
Weighted-average prepayment speed (CPR)	11.60%	13.00%
Weighted-average discount rate	10.00%	10.00%
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Balance at beginning of period	$ 7,618	$ 7,378	$ 7,378
Additions	220	185
Change in fair value	(698)	(506)
Balance at end of period	7,140	7,057	7,618
Loans [Member]
Servicing Assets at Fair Value [Line Items]
Balance at beginning of period	817,917	840,288	840,288
Balance at end of period	$ 813,800	$ 832,143	$ 817,917

Indemnification Asset - Summary

Indemnification Asset - Summary of Activity in Balance of Indemnification Asset (Liability) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
FDIC Indemnification Asset [Roll Forward]
Beginning balance	$ (521)	$ (349)
Effect of actual and estimated future covered losses and recoveries	(111)	(62)
Reimbursable (revenue) expenses incurred	(4)	(3)
Payments made to (received from) FDIC	29	(19)
Ending balance	(607)	(433)
Amount of indemnification asset (liability) recorded in other assets	11	114
Amount of indemnification asset (liability) recorded in other liabilities	(618)	(547)
Ending balance	$ (607)	$ (433)

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax asset, net	$ 33,803	$ 36,440
Prepaid expense	3,130	3,062
Software	1,892	1,290
Advanced compensation	571	673
Capital Trusts	1,697	1,696
Investment in Low Housing Tax Credit Funds	14,138	4,223
Miscellaneous other assets	2,489	1,207
Total other assets	$ 57,720	$ 48,591

Deposits - Summary of Balances

Deposits - Summary of Balances of Deposits (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Noninterest-bearing demand	$ 1,178,001	$ 1,155,695
Interest-bearing demand	884,638	853,961
Savings	1,368,644	1,281,540
Time certificates, $250,000 and over	77,184	75,897
Other time certificates	276,573	264,173
Total deposits	$ 3,785,040	$ 3,631,266

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Schedule Of Deposits [Line Items]
Overdrawn deposit balances classified as consumer loans	$ 1,164,000	$ 796,000
California [Member]
Schedule Of Deposits [Line Items]
Certificate of deposits, included in time certificates $250,000 and over	$ 50,000,000

Reserve for Unfunded Commitme99

Reserve for Unfunded Commitments - Summary of Activity in Reserve for Unfunded Commitments (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 2,145
Provision for losses - Unfunded commitments	(130)
Balance at end of period	$ 2,015

Other Liabilities - Components

Other Liabilities - Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Deferred compensation	$ 6,844	$ 6,725
Pension liability	26,557	26,182
Joint beneficiary agreements	2,581	2,529
Low income housing tax credit fund commitments	13,128	3,330
Accrued salaries and benefits expense	3,133	3,851
Taxes Payable	5,494
Loan escrow and servicing payable	947	2,037
Deferred revenue	1,067	1,082
Unsettled investment security purchases		17,072
Branch purchase settlement due	4,242
Miscellaneous other liabilities	4,071	2,485
Total other liabilities	$ 68,064	$ 65,293

Other Borrowings - Summary of B

Other Borrowings - Summary of Balances of Other Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total other borrowings	$ 18,671	$ 12,328
0.05% Fixed Rate Collateralized Borrowings [Member]
Debt Instrument [Line Items]
Other collateralized borrowings, fixed rate, as of March 31, 2016 of 0.05%, payable on April 1, 2016	$ 18,671	$ 12,328

Other Borrowings - Summary o102

Other Borrowings - Summary of Balances of Other Borrowings (Parenthetical) (Detail) - 0.05% Fixed Rate Collateralized Borrowings [Member]	3 Months Ended
	Mar. 31, 2016
Debt Instrument [Line Items]
Other collateralized borrowings, fixed rate	0.05%
Other collateralized borrowings, maturity date	Apr. 1, 2016

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Security repurchase agreement	$ 0	$ 0
Other collateralized borrowings	18,671,000	$ 12,328,000
Repurchase investment securities sold and pledged as collateral under securities repurchase agreement	23,509,000
FHLB collateral line of credit, maximum borrowings capacity	1,209,208,000
FHLB collateral line of credit, outstanding balance	0
FHLB collateral line of credit, remaining borrowing capacity	1,209,208,000
Loans designated as potential collateral under collateralized line of credit with FHLB	88,251,000
Investment securities designated as potential collateral under collateral line of credit	1,732,273,000
Collateralized line of credit with San Francisco Federal Reserve Bank, maximum borrowings capacity	128,015,000
Collateralized line of credit with San Francisco Federal Reserve Bank, outstanding balance	0
Collateralized line of credit with San Francisco Federal Reserve Bank, remaining borrowing capacity	128,015,000
Investment securities designated as potential collateral under collateral line of credit with San Francisco Federal Reserve Bank	216,000
Loans designated as potential collateral under collateral line of credit with San Francisco Federal Reserve Bank	219,438,000
Unused correspondent banking lines of credit from commercial banks for federal funds	$ 15,000,000

Junior Subordinated Debt - Addi

Junior Subordinated Debt - Additional Information (Detail) - USD ($)	Oct. 03, 2014	Mar. 31, 2016	Mar. 30, 2016	Dec. 31, 2015	Jun. 22, 2004	Jul. 31, 2003
Class of Stock [Line Items]
Common stock shares issued		22,785,173		22,775,173
Subordinated debenture, Face Value		$ 62,889,000
Subordinated debenture, recorded fair value		$ 56,519,000	$ 49,000	$ 56,470,000
North Valley Bancorp [Member]
Class of Stock [Line Items]
Acquisition, completion date		Oct. 3, 2014
TriCo Capital Trust I [Member]
Class of Stock [Line Items]
Common stock shares issued						619
Common stock par value						$ 1,000
Issuance of common stock, aggregate value						$ 619,000
Issued Junior Subordinated Debenture to the trust						$ 20,619,000
Offering of cumulative trust preferred securities						20,000
Cumulative trust preferred securities for cash in an aggregate amount						$ 20,000,000
Redeem the trust preferred securities		Oct. 7, 2033
LIBOR Rate, Description		Three-month LIBOR plus 3.05%
Preferred securities redeemable interest rate		3.05%
Company paid underwriting fees, per trust preferred security		$ 7.50
Company paid underwriting fees aggregate		$ 150,000
Net proceeds were used to finance the opening of new branches, services and technology		19,850,000
Subordinated debenture, Face Value		20,619,000
Subordinated debenture, recorded fair value		$ 20,619,000		20,619,000
TriCo Capital Trust II [Member]
Class of Stock [Line Items]
Common stock shares issued					619
Common stock par value					$ 1,000
Issuance of common stock, aggregate value					$ 619,000
Issued Junior Subordinated Debenture to the trust					$ 20,619,000
Offering of cumulative trust preferred securities					20,000
Cumulative trust preferred securities for cash in an aggregate amount					$ 20,000,000
Redeem the trust preferred securities		Jul. 23, 2034
LIBOR Rate, Description		Three-month LIBOR plus 2.55%
Preferred securities redeemable interest rate		2.55%
Company paid underwriting fees, per trust preferred security		$ 2.50
Company paid underwriting fees aggregate		$ 50,000
Net proceeds were used to finance the opening of new branches, services and technology		19,950,000
Subordinated debenture, Face Value		20,619,000
Subordinated debenture, recorded fair value		20,619,000		20,619,000
North Valley Trust II [Member]
Class of Stock [Line Items]
Subordinated debenture, Face Value	$ 6,186,000	6,186,000
Acquisition of common stock interests	186,000
Subordinated debenture, recorded fair value	5,006,000	5,065,000		5,055,000
North Valley Trust III [Member]
Class of Stock [Line Items]
Subordinated debenture, Face Value	5,155,000	5,155,000
Acquisition of common stock interests	155,000
Subordinated debenture, recorded fair value	3,918,000	3,976,000		3,966,000
North Valley Trust IV [Member]
Class of Stock [Line Items]
Subordinated debenture, Face Value	10,310,000	10,310,000
Acquisition of common stock interests	310,000
Subordinated debenture, recorded fair value	$ 6,063,000	$ 6,240,000		$ 6,211,000

Junior Subordinated Debt - Summ

Junior Subordinated Debt - Summary of Terms and Recorded Balance of Subordinated Debenture (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 30, 2016	Dec. 31, 2015	Oct. 03, 2014
Subordinated Borrowing [Line Items]
Subordinated debenture, Face Value	$ 62,889,000
Subordinated debenture, Recorded Book Value	$ 56,519,000	$ 49,000	$ 56,470,000
TriCo Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Maturity Date	Oct. 7, 2033
Subordinated debenture, Face Value	$ 20,619,000
Subordinated debenture, Coupon Rate	3.05%
Subordinated debenture, Current Coupon Rate	3.67%
Subordinated debenture, Recorded Book Value	$ 20,619,000		20,619,000
TriCo Capital Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Maturity Date	Jul. 23, 2034
Subordinated debenture, Face Value	$ 20,619,000
Subordinated debenture, Coupon Rate	2.55%
Subordinated debenture, Current Coupon Rate	3.17%
Subordinated debenture, Recorded Book Value	$ 20,619,000		20,619,000
North Valley Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Maturity Date	Apr. 24, 2033
Subordinated debenture, Face Value	$ 6,186,000			$ 6,186,000
Subordinated debenture, Current Coupon Rate	3.87%
Subordinated debenture, Recorded Book Value	$ 5,065,000		5,055,000	5,006,000
North Valley Trust III [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Maturity Date	Apr. 24, 2034
Subordinated debenture, Face Value	$ 5,155,000			5,155,000
Subordinated debenture, Current Coupon Rate	3.42%
Subordinated debenture, Recorded Book Value	$ 3,976,000		3,966,000	3,918,000
North Valley Trust IV [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Maturity Date	Mar. 15, 2036
Subordinated debenture, Face Value	$ 10,310,000			10,310,000
Subordinated debenture, Current Coupon Rate	1.96%
Subordinated debenture, Recorded Book Value	$ 6,240,000		$ 6,211,000	$ 6,063,000
LIBOR PLUS [Member] | TriCo Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Coupon Rate	3.05%
LIBOR PLUS [Member] | TriCo Capital Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Coupon Rate	2.55%
LIBOR PLUS [Member] | North Valley Trust II [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Coupon Rate	3.25%
LIBOR PLUS [Member] | North Valley Trust III [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Coupon Rate	2.80%
LIBOR PLUS [Member] | North Valley Trust IV [Member]
Subordinated Borrowing [Line Items]
Subordinated debenture, Coupon Rate	1.33%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)siteshares	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)$ / sharesshares	Aug. 21, 2007shares
Conversion of Stock [Line Items]
Reserves to satisfy Federal regulatory requirements	$ 79,117,000		$ 70,660,000
Number of sites leased under non-cancelable operating leases | site	42
Rent expense under operating leases	$ 981,000	$ 959,000
Rent expense offset by rent income	$ 58,000	$ 48,000
Commitment expiration date	One year or less or other termination clauses and may require payment of a fee.
Letters of credit, issue period	One year or less
Overdraft privilege receivable criteria	All holders of such accounts who bring their accounts to a positive balance at least once every thirty days receive the overdraft privilege.
Class B common stock of Visa Inc. | shares	22,785,173		22,775,173	15,814,662
Conversion ratio			1.648265
Common Class B [Member]
Conversion of Stock [Line Items]
Class B common stock of Visa Inc. | shares			13,396
Common Class A [Member]
Conversion of Stock [Line Items]
The value of the Class A shares | $ / shares			$ 77.55
Value of unredeemed Class A equivalent shares			$ 1,712,000

Commitments and Contingencie107

Commitments and Contingencies - Future Minimum Commitments under Non-Cancelable Operating Leases with Initial or Remaining Terms of One Year or More (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Leases [Abstract]
2,016	$ 3,067
2,017	2,400
2,018	1,755
2,019	1,211
2,020	2,382
Thereafter	659
Future minimum lease payments	$ 11,474

Commitments and Contingencie108

Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit
Construction [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 59,574	$ 71,846
RE Mortgage [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	51,723	42,793
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	8,152	8,330
Commercial [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	200,549	196,399
Other Consumer [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	398,860	394,278
Deposit Account Overdraft Privilege [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 96,997	$ 94,473

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Aug. 21, 2007
Class of Stock [Line Items]
Repurchase of common stock					500,000
Stock repurchase plan percentage of common stock					3.20%
Common stock, shares outstanding	22,785,173		22,775,173		15,814,662
Repurchased shares outstanding	166,600
Market value of common stock		$ 509,000
Maximum [Member]
Class of Stock [Line Items]
Cash dividend payable by bank			$ 73,297,000
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares outstanding	22,785,173	22,740,503	22,775,173	22,714,964
Company's common stock in lieu of cash to exercise options to purchase shares	0	21,461
Market value of common stock	$ 0	$ 509,000
Tri Counties Bank [Member]
Class of Stock [Line Items]
Cash dividends received	$ 3,680,000	$ 2,120,000

Stock Options and Other Equi110

Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options under the plan	938,350	948,350
Options currently not exercisable yet expected to vest	236,200
Weighted-average remaining contractual term	1 year 4 months 24 days
Pre-tax compensation costs expected to recognize	$ 894,000
Restricted Stock Units (RSUs) [Member] | Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units outstanding expected to vest	47,759	46,286
Weighted-average remaining contractual term	1 year 3 months 18 days
Pre-tax compensation costs	$ 640,000
Number of units released	0
Restricted Stock Units (RSUs) [Member] | Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units outstanding expected to vest	32,097	32,097
Weighted-average remaining contractual term	1 year 9 months 18 days
Pre-tax compensation costs	$ 396,000
Number of units released	0
Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Maximum aggregate number of shares of TriCo's common stock issued	650,000
Minimum [Member] | Restricted Stock Units (RSUs) [Member] | Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units released	0
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Maximum aggregate number of shares of TriCo's common stock issued	1,650,000
Maximum [Member] | Restricted Stock Units (RSUs) [Member] | Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units released	48,145
2009 Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares to be reduced pursuant to stock option for computation of available number of shares for issuance	1
Number of shares to be reduced pursuant to restricted stock award for computation of available number of shares for issuance	2
Outstanding options under the plan	670,000
Options available for grant under the plan	731,723
2009 Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units outstanding expected to vest	79,856
2001 Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options under the plan	268,350
Options available for grant under the plan	0
Share based compensation grant expiry period	10 years

Stock Options and Other Equi111

Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Number of Shares, beginning balance | shares	948,350
Options granted, Number of Shares | shares	0
Options exercised, Number of Shares | shares	(10,000)
Options forfeited, Number of Shares | shares	0
Options outstanding, Number of Shares, ending balance | shares	938,350
Options outstanding, Weighted Average Exercise Price, beginning balance	$ 17.94
Options granted, Weighted Average Exercise Price	0
Options exercised, Weighted Average Exercise Price	17.25
Options forfeited, Weighted Average Exercise Price	0
Options outstanding, Weighted Average Exercise Price, ending balance	17.95
Options granted, Weighted Average Fair Value on Date of Grant	0
Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Option Price per Share, beginning balance	12.63
Options granted, Option Price per Share	0
Options exercised, Option Price per Share	17.25
Options forfeited, Option Price per Share	0
Options outstanding, Option Price per Share, ending balance	12.63
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Option Price per Share, beginning balance	25.91
Options granted, Option Price per Share	0
Options exercised, Option Price per Share	17.25
Options forfeited, Option Price per Share	0
Options outstanding, Option Price per Share, ending balance	$ 25.91

Stock Options and Other Equi112

Stock Options and Other Equity-Based Incentive Instruments - Summary of Options Outstanding (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options | shares	938,350
Weighted average exercise price | $ / shares	$ 17.95
Intrinsic value (in thousands) | $	$ 6,934
Weighted average remaining contractual term (yrs.)	4 years 6 months
Currently Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options | shares	702,150
Weighted average exercise price | $ / shares	$ 18.10
Intrinsic value (in thousands) | $	$ 5,082
Weighted average remaining contractual term (yrs.)	3 years 10 months 24 days
Currently Not Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options | shares	236,200
Weighted average exercise price | $ / shares	$ 17.48
Intrinsic value (in thousands) | $	$ 1,852
Weighted average remaining contractual term (yrs.)	6 years 4 months 24 days

Stock Options and Other Equi113

Stock Options and Other Equity-Based Incentive Instruments - Restricted Stock Unit (RSU) Activity (Detail) - Restricted Stock Units (RSUs) [Member]	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of RSUs, beginning balance	32,097
RSUs released, Number of RSUs	0
RSUs forfeited/expired, Number of RSUs	0
RSUs outstanding, Number of RSUs, ending balance	32,097
Service Condition Vesting RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of RSUs, beginning balance	46,286
RSUs granted, Number of RSUs	1,192
RSUs added through dividend credits, Number of RSUs	281
RSUs released, Number of RSUs	0
RSUs forfeited/expired, Number of RSUs	0
RSUs outstanding, Number of RSUs, ending balance	47,759
RSUs granted, Weighted Average Fair Value on Date of Grant | $ / shares	$ 25.50

Noninterest Income and Expen114

Noninterest Income and Expense - Components of Other Noninterest Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Income Statement [Abstract]
Service charges on deposit accounts	$ 3,365				$ 3,600
ATM and interchange fees	3,393				3,002
Other service fees	728				714
Mortgage banking service fees	517				534
Change in value of mortgage servicing rights	(698)				(506)
Total service charges and fees	7,305				7,344
Gain on sale of loans	803				622
Commissions on sale of non-deposit investment products	532				965
Increase in cash value of life insurance	696				675
Change in indemnification asset	(115)				(65)
Gain on sale of foreclosed assets	92				311
Sale of customer checks	119				128
Lease brokerage income	195				137
Loss on disposal of fixed assets	(31)				(84)
Other	194				147
Total other noninterest income	2,485				2,836
Total noninterest income	$ 9,790	$ 11,445	$ 11,642	$ 12,080	$ 10,180

Noninterest Income and Expen115

Noninterest Income and Expense - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Mortgage loan servicing fees, net of change in fair value of mortgage loan servicing rights	$ (181,000)	$ 28,000

Noninterest Income and Expen116

Noninterest Income and Expense - Components of Noninterest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Schedule Of Other Noninterest Income And Expense [Line Items]
Base salaries, net of deferred loan origination costs	$ 12,708				$ 11,744
Incentive compensation	1,739				1,596
Benefits and other compensation costs	4,818				4,760
Total salaries and benefits expense	19,265				18,100
Occupancy	2,308				2,417
Equipment	1,386				1,414
Data processing and software	1,843				1,952
ATM network charges	1,006				770
Telecommunications	685				886
Postage	463				312
Courier service	271				248
Advertising	895				808
Assessments	632				651
Operational losses	164				124
Professional fees	809				1,119
Foreclosed assets expense	46				98
(Reversal of) provision for foreclosed asset losses	(11)				67
Reserve for unfunded commitments					(130)
Intangible amortization	299				289
Merger and acquisition expense	622				586
Other miscellaneous expense	3,068				2,571
Total other noninterest expense	14,486				14,182
Total noninterest expense	33,751	$ 34,684	$ 31,439	$ 32,436	32,282
North Valley Bancorp [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Base salaries (outside temporary help)	187
Data processing and software					108
Professional fees	180				120
Advertising and marketing	114
Merger and acquisition expense	622				586
Other miscellaneous expense	$ 141				$ 358

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Tax Rate and Statutory Federal Income Tax Rate (Detail)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	35.00%	35.00%
State income taxes, net of federal tax benefit	6.30%	6.90%
Tax-exempt interest on municipal obligations	(1.80%)	(0.40%)
Increase in cash value of insurance policies	(1.40%)	(1.70%)
Other		0.80%
Effective Tax Rate	38.10%	40.60%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 10,674	$ 11,422	$ 12,694	$ 11,366	$ 8,336
Average number of common shares outstanding	22,783				22,727
Effect of dilutive stock options and restricted stock	263				223
Average number of common shares outstanding used to calculate diluted earnings per share	23,046				22,950
Options excluded from diluted earnings per share because the effect of these options was antidilutive	23				23

Comprehensive Income - Componen

Comprehensive Income - Components of Other Comprehensive Income and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity [Abstract]
Unrealized holding gains (losses) on available for sale securities before reclassifications	$ 6,125	$ 15
Amounts reclassified out of accumulated other comprehensive income-	0	0
Unrealized holding gains (losses) on available for sale securities after reclassifications	6,125	15
Tax effect	(2,575)	(6)
Unrealized holding gains (losses) on available for sale securities, net of tax	3,550	9
Change in unfunded status of the supplemental retirement plans before reclassifications	0	0
Amounts reclassified out of accumulated other comprehensive income:
Amortization of prior service cost		(14)
Amortization of actuarial losses		206
Total amounts reclassified out of accumulated other comprehensive income		192
Change in unfunded status of the supplemental retirement plans after reclassifications		192
Tax effect		(81)
Change in unfunded status of the supplemental retirement plans, net of tax		111
Change in joint beneficiary agreement liability before reclassifications	0	0
Amounts reclassified out of accumulated other comprehensive income	0	0
Change in joint beneficiary agreement liability after reclassifications	0	0
Tax effect	0	0
Change in joint beneficiary agreement liability, net of tax	0	0
Total other comprehensive gain (loss)	$ 3,550	$ 120

Comprehensive Income - Compo120

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Net unrealized gains on available for sale securities	$ 8,270	$ 2,145
Tax effect	(3,477)	(902)
Unrealized holding gains on available for sale securities, net of tax	4,793	1,243
Unfunded status of the supplemental retirement plans	(5,735)	(5,735)
Tax effect	2,411	2,411
Unfunded status of the supplemental retirement plans, net of tax	(3,324)	(3,324)
Joint beneficiary agreement liability	303	303
Tax effect	0	0
Joint beneficiary agreement liability, net of tax	303	303
Accumulated other comprehensive loss	$ 1,772	$ (1,778)

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Salaries & benefits expense	$ 19,265,000	$ 18,100,000
Employee service period under ESOP	1 year
Deferred compensation obligations	$ 6,844,000			$ 6,725,000
Earnings credits on deferred balances included in noninterest expense	126,000	149,000
Salary [Member]
Defined Benefit Plan Disclosure [Line Items]
Expenses related to ESOP	$ 441,000	368,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum age for employees				21 years
Minimum period for employees to participate				90 days
Discretionary matching contribution equal to percentage of participant's contribution	50.00%
Discretionary matching contribution maximum percentage of eligible compensation	4.00%
Salaries & benefits expense	$ 160,000	0
Employer's contribution to retirement plan	293,000	0
Supplemental Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution to retirement plan	$ 269,000	$ 219,000
Supplemental Retirement Plans [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution to retirement plan			$ 1,104,000

Retirement Plans - Net Periodic

Retirement Plans - Net Periodic Benefit Cost Recognized for Supplemental Retirement Plans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net pension cost included the following components:
Service cost-benefits earned during the period	$ 260	$ 256
Interest cost on projected benefit obligation	256	239
Amortization of net obligation at transition	0	0
Amortization of prior service cost	(10)	(14)
Recognized net actuarial loss	138	206
Net periodic pension cost	$ 644	$ 687

Related Party Transactions - Su

Related Party Transactions - Summary of Activity in Lending Transactions (Detail) - Directors and Officers [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Beginning balance	$ 4,201	$ 3,132
Advances/new loans	71	3,098
Removed/payments	(648)	(2,029)
Ending balance	$ 3,624	$ 4,201

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Modern Building Inc. [Member]
Related Party Transaction [Line Items]
Aggregate payments for construction services	$ 589,000	$ 1,030,000

Fair Value Measurement - Record

Fair Value Measurement - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 5,738	$ 6,189	$ 6,074
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,738	6,189	$ 6,074
Fair Value Measurements on Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	484,594	412,503
Fair Value Measurements on Recurring Basis [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	360,253	313,682
Fair Value Measurements on Recurring Basis [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	114,174	88,218
Fair Value Measurements on Recurring Basis [Member] | Marketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,027	2,985
Fair Value Measurements on Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,027	2,985
Fair Value Measurements on Recurring Basis [Member] | Level 1 [Member] | Marketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,027	2,985
Fair Value Measurements on Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	474,427	401,900
Fair Value Measurements on Recurring Basis [Member] | Level 2 [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	360,253	313,682
Fair Value Measurements on Recurring Basis [Member] | Level 2 [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	114,174	88,218
Fair Value Measurements on Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,140	7,618
Fair Value Measurements on Recurring Basis [Member] | Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,140	7,618
Fair Value Measurements on Recurring Basis [Member] | Mortgage Servicing Rights [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 7,140	$ 7,618

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between any levels	$ 0	$ 0
Carrying value of loans fully charged-off	0
Securities held to maturity	705,133,000	726,530,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	$ 0	$ 0

Fair Value Measurement - Reconc

Fair Value Measurement - Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis (Detail) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Ending Balance	$ 7,618	$ 7,378
Transfers into (out of) Level 3	0	0
Change Included in Earnings	(698)	(506)
Issuances	220	185
Beginning Balance	$ 7,140	$ 7,057

Fair Value Measurement - Quanti

Fair Value Measurement - Quantitative Information about Recurring Level 3 Fair Value Measurements (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	11.60%	13.00%
Discount rate	10.00%	10.00%
Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortgages Servicing Rights, Fair Value	$ 7,140	$ 7,057	$ 7,618	$ 7,378
Minimum [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	10.00%		10.00%
Minimum [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	6.40%		6.30%
Maximum [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	12.00%		12.00%
Maximum [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	20.60%		20.50%
Weighted Average [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	10.00%		10.00%
Weighted Average [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	11.60%		9.80%

Fair Value Measurement - Assets

Fair Value Measurement - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 5,738	$ 6,074	$ 6,189
Total Gains/(Losses)	(828)	(245)	(762)
Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,355	3,690	4,649
Total Gains/(Losses)	(828)	(181)	(660)
Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,383	2,384	1,540
Total Gains/(Losses)	0	(64)	(102)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,738	6,074	6,189
Level 3 [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,355	3,690	4,649
Level 3 [Member] | Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 1,383	$ 2,384	$ 1,540

Fair Value Measurement - Qua130

Fair Value Measurement - Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 5,738	$ 6,189	$ 6,074
Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	4,355	4,649	3,690
Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,383	1,540	2,384
Foreclosed Assets [Member] | Land & Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		96
Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,116	1,117
Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	267	267
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	5,738	6,189	6,074
Level 3 [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	4,355	4,649	3,690
Level 3 [Member] | Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,383	$ 1,540	$ 2,384
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	0.00%	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Foreclosed Assets [Member] | Land & Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales		(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Foreclosed Assets [Member] | Land & Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales		(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Foreclosed Assets [Member] | Land & Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales		(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustment for differences between comparable sales	(5.00%)	(5.00%)
Level 3 [Member] | Income Approach [Member] | Minimum [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization rate	7.00%	7.00%
Level 3 [Member] | Income Approach [Member] | Maximum [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization rate	7.00%	8.00%
Level 3 [Member] | Income Approach [Member] | Weighted Average [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization rate	7.00%	7.25%

Fair Value Measurement - Estima

Fair Value Measurement - Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets (Detail) - USD ($)	Mar. 31, 2016	Mar. 30, 2016	Dec. 31, 2015
Financial assets:
Cash and due from banks	$ 76,702,000		$ 94,305,000
Cash at Federal Reserve and other banks	312,176,000		209,156,000
Securities held to maturity	705,133,000		726,530,000
Financial liabilities:
Other borrowings	18,671,000		12,328,000
Junior subordinated debt	56,519,000	$ 49,000	56,470,000
Level 3 [Member]
Financial assets:
Securities held to maturity	0		0
Contract Amount [Member] | Level 3 [Member]
Off-balance sheet:
Commitments	710,706,000		705,316,000
Standby letters of credit	8,152,000		8,330,000
Overdraft privilege commitments	96,997,000		94,473,000
Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans, net	2,590,603,000		2,555,297,000
Financial liabilities:
Junior subordinated debt	45,837,000		44,527,000
Off-balance sheet:
Commitments	7,107,000		7,053,000
Standby letters of credit	82,000		83,000
Overdraft privilege commitments	970,000		945,000
Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	76,702,000		94,305,000
Cash at Federal Reserve and other banks	312,176,000		209,156,000
Fair Value [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	723,777,000		732,208,000
Loans held for sale	2,240,000		1,873,000
Financial liabilities:
Deposits	3,784,443,000		3,630,129,000
Other borrowings	18,671,000		12,328,000
Carrying Amount [Member] | Level 3 [Member]
Financial assets:
Loans, net	2,505,159,000		2,486,926,000
Financial liabilities:
Junior subordinated debt	56,519,000		56,470,000
Carrying Amount [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	76,702,000		94,305,000
Cash at Federal Reserve and other banks	312,176,000		209,156,000
Carrying Amount [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	705,133,000		726,530,000
Restricted equity securities	16,956,000		16,596,000
Loans held for sale	2,240,000		1,873,000
Financial liabilities:
Deposits	3,785,040,000		3,631,266,000
Other borrowings	$ 18,671,000		$ 12,328,000

TriCo Bancshares Condensed F132

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 30, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Assets
Cash and Cash equivalents	$ 388,878		$ 303,461	$ 281,228	$ 610,728
Other assets	57,720		48,591
Total assets	4,394,956		4,220,722
Liabilities and shareholders' equity Other liabilities	68,064		65,293
Junior subordinated debt	56,519	$ 49	56,470
Total liabilities	3,931,520		3,768,606
Shareholders' equity:
Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,785,173 and 22,775,173 shares, respectively	248,101		247,587
Retained earnings	213,563		206,307
Accumulated other comprehensive income (loss), net	1,772		(1,778)
Total shareholders' equity	463,436		452,116	424,833	418,172
Total liabilities and shareholders' equity	4,394,956		4,220,722
Parent [Member]
Assets
Cash and Cash equivalents	2,686		2,565	$ 2,044	$ 2,229
Investment in Tri Counties Bank	515,938		504,655
Other assets	1,702		1,714
Total assets	520,326		508,934
Liabilities and shareholders' equity Other liabilities	371		348
Junior subordinated debt	56,519		56,470
Total liabilities	56,890		56,818
Shareholders' equity:
Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,785,173 and 22,775,173 shares, respectively	248,101		247,587
Retained earnings	213,563		206,307
Accumulated other comprehensive income (loss), net	1,772		(1,778)
Total shareholders' equity	463,436		452,116
Total liabilities and shareholders' equity	$ 520,326		$ 508,934

TriCo Bancshares Condensed F133

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares	Mar. 31, 2016	Dec. 31, 2015	Aug. 21, 2007
Condensed Financial Statements, Captions [Line Items]
Common stock, par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,785,173	22,775,173
Common stock, shares outstanding	22,785,173	22,775,173	15,814,662
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Common stock, par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,775,173	22,785,173
Common stock, shares outstanding	22,775,173	22,785,173

TriCo Bancshare Condensed Finan

TriCo Bancshare Condensed Financial Statements (Parent Only) - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Interest expense	$ 1,392	$ 1,349	$ 1,339	$ 1,346	$ 1,382
Income before income taxes	17,232	18,810	21,062	18,798	14,044
Equity in net income of Tri Counties Bank:
Income tax benefit	(6,558)	(7,388)	(8,368)	(7,432)	(5,708)
Net income	10,674	$ 11,422	$ 12,694	$ 11,366	8,336
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Interest expense	535				482
Administration expense	149				153
Income before income taxes	(684)				(635)
Equity in net income of Tri Counties Bank:
Distributed	3,680				2,120
Under distributed	7,390				6,584
Income tax benefit	288				267
Net income	$ 10,674				$ 8,336

TriCo Bancshare Condensed Fi135

TriCo Bancshare Condensed Financial Statements (Parent Only) - Condensed Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net income	$ 10,674	$ 11,422	$ 12,694	$ 11,366	$ 8,336
Other comprehensive loss, net of tax:
Increase (decrease) in unrealized gains on available for sale securities arising during the period	3,550				9
Change in minimum pension liability					(111)
Other comprehensive loss	3,550				120
Comprehensive income	14,224				8,456
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	10,674				8,336
Other comprehensive loss, net of tax:
Increase (decrease) in unrealized gains on available for sale securities arising during the period	3,550				9
Change in minimum pension liability					111
Other comprehensive loss	3,550				120
Comprehensive income	$ 14,224				$ 8,456

TriCo Bancshare Condensed Fi136

TriCo Bancshare Condensed Financial Statements (Parent Only) - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Operating activities:
Net income	$ 10,674	$ 11,422	$ 12,694	$ 11,366	$ 8,336
Adjustments to reconcile net income to net cash provided by operating activities:
Equity compensation vesting expense	331				324
Stock option excess tax benefits	(10)				(18)
Net cash from operating activities	4,100				12,961
Financing activities:
Stock option excess tax benefits	10				18
Repurchase of common stock					(27)
Cash dividends paid - common	(3,418)				(2,515)
Net cash used by financing activities	(4,349)				(33,234)
Net change in cash and cash equivalents	85,417				(329,500)
Cash and cash equivalents and beginning of year	303,461			281,228	610,728
Cash and cash equivalents at end of year	388,878	303,461			281,228
Parent [Member]
Operating activities:
Net income	10,674				8,336
Adjustments to reconcile net income to net cash provided by operating activities:
Under distributed equity in earnings of Tri Counties Bank	(7,390)				(6,584)
Equity compensation vesting expense	331				324
Stock option excess tax benefits	(10)				(18)
Net change in other assets and liabilities	(249)				(124)
Net cash from operating activities	3,356				1,934
Financing activities:
Stock option excess tax benefits	10				18
Issuance of common stock through option exercise	173				405
Repurchase of common stock					(27)
Cash dividends paid - common	(3,418)				(2,515)
Net cash used by financing activities	(3,235)				(2,119)
Net change in cash and cash equivalents	121				(185)
Cash and cash equivalents and beginning of year	2,565			$ 2,044	2,229
Cash and cash equivalents at end of year	$ 2,686	$ 2,565			$ 2,044

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer phased period	4 years
Maximum capital conservation buffer percentage on risk-weighted assets , 2016	0.625%
Maximum capital conservation buffer percentage on risk-weighted assets , 2017	1.25%
Maximum capital conservation buffer percentage on risk-weighted assets , 2018	1.875%
Maximum capital conservation buffer percentage on risk-weighted assets , 2019 and thereafter	1.875%
Maximum countercyclical buffer on common equity Tier 1 capital	2.50%
Minimum asset required to be considered advanced approach banks	$ 250,000,000,000
Minimum asset required to be considered advanced approach banks	10,000,000,000
Maximum asset required to be considered small depository institution holding companies	15,000,000,000
Minimum asset required to be considered top-tier banking organizations	$ 50,000,000,000
Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Required to be considered well capitalized, Tier 1 capital ratio	8.00%	8.00%	6.00%
Required to be considered well capitalized, Total capital ratio	10.00%	10.00%	10.00%
Required to be considered well capitalized, Tier 1 leverage ratio	5.00%	5.00%	4.00%
Basel III Phase-in Schedule [Member] | Parent [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	6.00%	6.00%	4.00%
Minimum capital level requirements, Total capital ratio	8.00%	8.00%	8.00%
Minimum capital level requirements, Tier 1 leverage ratio	4.00%	4.00%
Basel III Phase-in Schedule [Member] | Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	6.00%	6.00%	4.00%
Minimum capital level requirements, Total capital ratio	8.00%	8.00%	8.00%
Minimum capital level requirements, Tier 1 leverage ratio	4.00%	4.00%
Basel III Fully Phased In [Member] | Parent [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	8.50%	8.50%
Minimum capital level requirements, Total capital ratio	10.50%	10.50%
Minimum capital level requirements, Tier 1 leverage ratio	4.00%	4.00%
Basel III Fully Phased In [Member] | Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	8.50%	8.50%
Minimum capital level requirements, Total capital ratio	10.50%	10.50%
Minimum capital level requirements, Tier 1 leverage ratio	4.00%	4.00%
Common Stock [Member] | Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Required to be considered well capitalized, Tier 1 capital ratio	6.50%	6.50%
Common Stock [Member] | Basel III Phase-in Schedule [Member] | Parent [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	4.50%	4.50%
Common Stock [Member] | Basel III Phase-in Schedule [Member] | Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	4.50%	4.50%
Common Stock [Member] | Basel III Fully Phased In [Member] | Parent [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	7.00%	7.00%
Common Stock [Member] | Basel III Fully Phased In [Member] | Tri Countries Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	7.00%	7.00%

Regulatory Matters - Actual and

Regulatory Matters - Actual and Required Capital Ratios of Bank (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Parent [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 480,710	$ 474,436
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	441,847	435,950
Tier 1 Capital (to Average Assets), Actual, Amount	$ 441,847	$ 435,950
Total Capital (to Risk Weighted Assets), Actual, Ratio	15.13%	15.09%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.90%	13.86%
Tier 1 Capital (to Average Assets), Actual, Ratio	10.68%	10.79%
Parent [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 254,246	$ 251,555
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	190,684	188,666
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 165,442	$ 161,562
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.00%	8.00%	8.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	6.00%	6.00%	4.00%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Parent [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 333,698	$ 330,165
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	270,136	267,277
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 165,442	$ 161,562
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	10.50%	10.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.50%	8.50%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Parent [Member] | Common Stock [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	$ 389,322	$ 385,747
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	12.25%	12.27%
Parent [Member] | Common Stock [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 143,013	$ 141,499
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	4.50%	4.50%
Parent [Member] | Common Stock [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 222,465	$ 220,110
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.00%	7.00%
Tri Countries Bank [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 478,390	$ 473,327
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	439,527	434,841
Tier 1 Capital (to Average Assets), Actual, Amount	$ 439,527	$ 434,841
Total Capital (to Risk Weighted Assets), Actual, Ratio	15.06%	15.06%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.84%	13.84%
Tier 1 Capital (to Average Assets), Actual, Ratio	10.63%	10.76%
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 317,637	$ 314,272
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	254,110	251,418
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 206,798	$ 202,002
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%	6.00%
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%	4.00%
Tri Countries Bank [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 254,110	$ 251,418
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	190,582	188,563
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 165,438	$ 161,601
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.00%	8.00%	8.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	6.00%	6.00%	4.00%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tri Countries Bank [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 333,519	$ 329,985
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	269,992	267,131
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 165,438	$ 161,601
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	10.50%	10.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.50%	8.50%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tri Countries Bank [Member] | Common Stock [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	$ 439,527	$ 434,841
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.84%	13.84%
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 206,464	$ 204,277
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tri Countries Bank [Member] | Common Stock [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 142,937	$ 141,422
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	4.50%	4.50%
Tri Countries Bank [Member] | Common Stock [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 222,346	$ 219,990
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.00%	7.00%

Summary of Quarterly Results139

Summary of Quarterly Results of Operations (Unaudited) - Result of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Loans:
Discount accretion PCI - cash basis	$ 269	$ 302	$ 445	$ 404	$ 172
Discount accretion PCI - other	45	1,392	1,090	907	1,274
Discount accretion PNCI	868	573	1,590	822	1,348
All other loan interest income	33,646	32,571	30,689	29,886	28,371
Total loan interest income	34,738	34,838	33,814	32,019	31,165
Debt securities, dividends and interest bearing cash at banks (not FTE)	8,056	7,652	7,518	7,848	6,560
Total interest and dividend income	42,794	42,490	41,332	39,867	37,725
Interest expense	1,392	1,349	1,339	1,346	1,382
Net interest income	41,402	41,141	39,993	38,521	36,343
(Benefit from) provision for loan losses	209	(908)	(866)	(633)	197
Net interest income after provision for loan losses	41,193	42,049	40,859	39,154	36,146
Noninterest income	9,790	11,445	11,642	12,080	10,180
Noninterest expense	33,751	34,684	31,439	32,436	32,282
Income before income taxes	17,232	18,810	21,062	18,798	14,044
Income tax expense	6,558	7,388	8,368	7,432	5,708
Net income	$ 10,674	$ 11,422	$ 12,694	$ 11,366	$ 8,336
Per common share:
Net income (diluted)	$ 0.46	$ 0.50	$ 0.55	$ 0.49	$ 0.36
Dividends	$ 0.15	$ 0.15	$ 0.13	$ 0.13	$ 0.11