TriCo Bancshares (TCBK) 10-Q 10 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 03, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
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		22,873,305

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 113,569	$ 92,197
Cash at Federal Reserve and other banks	210,137	213,415
Cash and cash equivalents	323,706	305,612
Investment securities:
Available for sale	571,719	550,233
Held to maturity	580,137	602,536
Restricted equity securities	16,956	16,956
Loans held for sale	1,176	2,998
Total loans, net of unamortized deferred loan fees and discounts	2,761,192	2,759,593
Allowance for loan losses	(31,017)	(32,503)
Total loans, net	2,730,175	2,727,090
Foreclosed assets, net	3,529	3,986
Premises and equipment, net	49,508	48,406
Cash value of life insurance	95,783	95,912
Accrued interest receivable	11,236	12,027
Goodwill	64,311	64,311
Other intangible assets, net	6,204	6,563
Mortgage servicing rights	6,860	6,595
Other assets	66,654	74,743
Total assets	4,527,954	4,517,968
Deposits:
Noninterest-bearing demand	1,254,431	1,275,745
Interest-bearing	2,644,453	2,619,815
Total deposits	3,898,884	3,895,560
Accrued interest payable	770	818
Reserve for unfunded commitments	2,734	2,719
Other liabilities	66,938	67,364
Other borrowings	15,197	17,493
Junior subordinated debt	56,713	56,667
Total liabilities	4,041,236	4,040,621
Commitments and contingencies (Note 18)
Shareholders' equity:
Common stock, no par value: 50,000,000 shares authorized; issued and outstanding: 22,873,305 at March 31, 2017 22,867,802 at December 31, 2016	253,456	252,820
Retained earnings	240,664	232,440
Accumulated other comprehensive loss, net of tax	(7,402)	(7,913)
Total shareholders' equity	486,718	477,347
Total liabilities and shareholders' equity	$ 4,527,954	$ 4,517,968

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2017	Dec. 31, 2016	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	22,873,305	22,867,802
Common stock, shares outstanding	22,873,305	22,867,802	15,814,662

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest and dividend income:
Loans, including fees	$ 34,914	$ 34,738
Debt securities:
Taxable	6,703	6,545
Tax exempt	1,041	897
Dividends	391	375
Interest bearing cash at Federal Reserve and other banks	435	239
Total interest and dividend income	43,484	42,794
Interest expense:
Deposits	894	855
Other borrowings	2	2
Junior subordinated debt	595	535
Total interest expense	1,491	1,392
Net interest income	41,993	41,402
(Benefit from reversal of) provision for loan losses	(1,557)	209
Net interest income after provision for loan losses	43,550	41,193
Noninterest income:
Service charges and fees	8,907	7,305
Gain on sale of loans	910	803
Commissions on sale of non-deposit investment products	607	532
Increase in cash value of life insurance	685	696
Other	594	454
Total noninterest income	11,703	9,790
Noninterest expense:
Salaries and related benefits	20,893	19,265
Other	14,929	14,486
Total noninterest expense	35,822	33,751
Income before income taxes	19,431	17,232
Provision for income taxes	7,352	6,558
Net income	$ 12,079	$ 10,674
Earnings per share:
Basic	$ 0.53	$ 0.47
Diluted	$ 0.52	$ 0.46

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 12,079	$ 12,533	$ 12,199	$ 9,405	$ 10,674
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available for sale securities arising during the period	457				3,550
Change in minimum pension liability	54
Other comprehensive income (loss)	511				3,550
Comprehensive income	$ 12,590				$ 14,224

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2015	$ 452,116	$ 247,587	$ 206,307	$ (1,778)
Beginning balance, shares at Dec. 31, 2015		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
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
Beginning balance at Dec. 31, 2016	$ 477,347	$ 252,820	232,440	(7,913)
Beginning balance, shares at Dec. 31, 2016	22,867,802	22,867,802
Net income	$ 12,079		12,079
Other comprehensive income	511			511
Stock option vesting	88	$ 88
RSU vesting	204	204
PSU vesting	89	89
Stock options exercised	$ 435	$ 435
Stock options exercised, shares	21,450	21,450
RSUs released
RSUs released, shares		304
Repurchase of common stock, value	(604)	$ (180)	(424)
Repurchase of common stock, shares		(16,251)
Dividends paid	(3,431)		(3,431)
Ending balance at Mar. 31, 2017	$ 486,718	$ 253,456	$ 240,664	$ (7,402)
Ending balance, shares at Mar. 31, 2017	22,873,305	22,873,305

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Dividends paid, per share	$ 0.15	$ 0.15
Retained Earnings [Member]
Dividends paid, per share	$ 0.15	$ 0.15

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 12,079	$ 10,674
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	1,604	1,526
Amortization of intangible assets	359	299
(Reversal of) provision for loan losses	(1,557)	209
Amortization of investment securities premium, net	798	1,131
Originations of loans for resale	(34,317)	(26,130)
Proceeds from sale of loans originated for resale	36,771	26,243
Gain on sale of loans	(910)	(803)
Change in market value of mortgage servicing rights	13	698
Reversal of losses on foreclosed assets	(66)	(11)
Gain on sale of foreclosed assets	(118)	(92)
Loss on disposal of fixed assets		31
Gain on sale of premises held for sale	(3)
Increase in cash value of life insurance	(685)	(696)
Gain on life insurance death benefit	(107)
Equity compensation vesting expense	381	331
Stock option excess tax benefits		(10)
Change in:
Reserve for unfunded commitments	15	0
Interest receivable	791	(289)
Interest payable	(48)	(23)
Other assets and liabilities, net	4,444	(8,988)
Net cash from operating activities	19,444	4,100
Investing activities:
Proceeds from maturities of securities available for sale	14,069	10,052
Proceeds from maturities of securities held to maturity	22,074	20,815
Purchases of securities available for sale	(35,241)	(77,045)
Loan origination and principal collections, net	(1,613)	(45,515)
Proceeds from sale of loans other than loans originated for sale		27,049
Proceeds from sale of other real estate owned	726	1,417
Proceeds from sale of premises and equipment		1
Proceeds from sale of premises held for sale	3,338
Purchases of premises and equipment	(2,413)	(7,424)
Life insurance proceeds	282
Cash received from acquisition, net		156,316
Net cash provided by investing activities	1,222	85,666
Financing activities:
Net increase (decrease) in deposits	3,324	(7,457)
Net change in other borrowings	(2,296)	6,343
Stock option excess tax benefits		10
Repurchase of common stock	(169)
Dividends paid	(3,431)	(3,418)
Exercise of stock options		173
Net cash used by financing activities	(2,572)	(4,349)
Net change in cash and cash equivalents	18,094	85,417
Cash and cash equivalents and beginning of year	305,612	303,461
Cash and cash equivalents at end of year	323,706	388,878
Supplemental disclosure of noncash activities:
Unrealized gain on securities available for sale	787	6,125
Loans transferred to foreclosed assets	85	416
Deferred gain on sale of premises held for sale	438
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	604
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	1,539	1,415
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, 2017
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. The Bank operates from 58 traditional branches and 10 in-store The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,703,000 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. 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. 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, 2017 and throughout 2016, 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 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 original 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 specific reserve allocation within the allowance for loan losses. 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 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 re-graded Re-grading 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. 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 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality 310-30, 310-30 310-30 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, 310-20, 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 shorter of the estimated useful lives of the related assets or lease terms. Asset lives range from 3-10 15-40 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 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. Low Income Housing Tax Credits The Company accounts for low income housing tax credits and the related qualified affordable housing projects using the proportional amortization method. Under the proportional amortization method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). Upon entering into a qualified affordable housing project, the Company records, in other liabilities, the entire amount that it has agreed to invest in the project, and an equal amount, in other assets, representing its investment in the project. As the Company disburses cash to satisfy its investment obligation, other liabilities are reduced. Over time, as the tax credits and other tax benefits of the project are realized by the Company, the investment recorded in other assets is reduced using the proportional amortization method. 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 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. Recent Accounting Pronouncements FASB issued Accounting Standard Update (ASU) No. 2016-02 , Leases (Topic 842) ASU 2016-2, on-balance ASU 2016-02 2016-02 FASB issued Accounting Standard Update (ASU) No. 2016-09 , Compensation – Stock Compensation (Topic 718). ASU 2016-09, ASU 2016-09 FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326) 2016-13 2016-13, 2016-13 available-for-sale 2016-13 2016-13 2016-13 FASB issued ASU No. 2016-18, Statement of Cash Flows - Restricted Cash (Topic 230). ASU 2016-18 beginning-of-period end-of-period ASU 2016-18 FASB issued ASU No. 2017-01, Business Combinations - Clarifying the Definition of a Business (Topic 805). ASU 2017-01 ASU 2017-01 ASU 2017-01 FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): 2017-04 ASU 2017-04

Business Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Business Combinations	Note 2 - Business Combinations On March 18, 2016, the 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 compared to the Company’s then-existing Northern California customer base and branch locations. Beginning March 18, 2016, the revenue and expenses from the operations of the acquired branches are included in the results of the Company. The Bank paid a premium of $3,204,000 for deposit relationships with balances of $161,231,000 and loans with balances of $289,000. 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 the results of operations of the acquired branches 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 because 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, 2017
Investments Schedule [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, 2017 Amortized Gross Gross Estimated (in thousands) Securities Available for Sale Obligations of U.S. government corporations and agencies $ 455,093 $ 1,846 $ (6,323 ) $ 450,616 Obligations of states and political subdivisions 121,709 321 (3,865 ) 118,165 Marketable equity securities 3,000 — (62 ) 2,938 Total securities available for sale $ 579,802 $ 2,167 $ (10,250 ) $ 571,719 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 565,578 $ 5,652 $ (3,906 ) $ 567,324 Obligations of states and political subdivisions 14,559 101 (168 ) 14,492 Total securities held to maturity $ 580,137 $ 5,753 $ (4,074 ) $ 581,816 December 31, 2016 Amortized Gross Gross Estimated (in thousands) Securities Available for Sale Obligations of U.S. government corporations and agencies $ 434,357 $ 1,949 $ (6,628 ) $ 429,678 Obligations of states and political subdivisions 121,746 267 (4,396 ) 117,617 Marketable equity securities 3,000 — (62 ) 2,938 Total securities available for sale $ 559,103 $ 2,216 $ (11,086 ) $ 550,233 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 587,982 $ 5,001 $ (4,199 ) $ 588,784 Obligations of states and political subdivisions 14,554 56 (191 ) 14,419 Total securities held to maturity $ 602,536 $ 5,057 $ (4,390 ) $ 603,203 No investment securities were sold during the three months ended March 31, 2017 or the three months ended March 31, 2016. Investment securities with an aggregate carrying value of $280,534,000 and $292,737,000 at March 31, 2017 and December 31, 2016, 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, 2017 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, 2017, obligations of U.S. government corporations and agencies with a cost basis totaling $1,020,671,000 consist almost entirely of residential real estate 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, 2017, the Company estimates the average remaining life of these mortgage-backed securities issued by U.S. government corporations and agencies to be approximately 6.0 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 Due in one year $ 5 $ 5 — — Due after one year through five years 8,290 8,519 $ 1,184 $ 1,213 Due after five years through ten years 13,806 14,344 4,539 4,574 Due after ten years 557,701 548,851 574,414 576,029 Totals $ 579,802 $ 571,719 $ 580,137 $ 581,816 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 (in thousands) March 31, 2017 Securities Available for Sale: Obligations of U.S. government corporations and agencies $ 359,657 $ (6,323 ) — — $ 359,657 $ (6,323 ) Obligations of states and political subdivisions 83,818 (3,865 ) — — 83,818 (3,865 ) Marketable equity securities 2,938 (62 ) — — 2,938 (62 ) Total securities available-for-sale $ 446,413 $ (10,250 ) — — $ 446,413 $ (10,250 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 226,101 $ (3,906 ) — — $ 226,101 $ (3,906 ) Obligations of states and political subdivisions 7,867 (168 ) — — 7,867 (168 ) Total securities held-to-maturity $ 233,968 $ (4,074 ) — — $ 233,968 $ (4,074 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) December 31, 2016 Securities Available for Sale: Obligations of U.S. government corporations and agencies $ 370,389 $ (6,628 ) — — $ 370,389 $ (6,628 ) Obligations of states and political subdivisions 90,825 (4,396 ) — — 90,825 (4,396 ) Marketable equity securities 2,938 (62 ) — — 2,938 (62 ) Total securities available-for-sale $ 464,152 $ (11,086 ) — — $ 464,152 $ (11,086 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 280,497 $ (4,199 ) — — $ 280,497 $ (4,199 ) Obligations of states and political subdivisions 9,984 (191 ) — — 9,984 (191 ) Total securities held-to-maturity $ 290,481 $ (4,390 ) — — $ 290,481 $ (4,390 ) 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, 2017, 58 debt securities representing obligations of U.S. government corporations and agencies had unrealized losses with aggregate depreciation of (1.72%) 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, 2017, 100 debt securities representing obligations of states and political subdivisions had unrealized losses with aggregate depreciation of (4.21%) from the Company’s amortized cost basis. Marketable equity securities: At March 31, 2017, 2 marketable equity securities had unrealized losses with aggregate depreciation of (2.07%) from the Company’s amortized cost basis. The Company has the intent and ability to hold these securities for the foreseeable future and no credit quality deterioration associated with these securities has been identified, therefore, management does not believe that they are other than temporarily impaired.

Loans

Loans	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans	Note 4 – Loans A summary of loan balances follows (in thousands): March 31, 2017 Originated PNCI PCI - PCI - Total Mortgage loans on real estate: Residential 1-4 $ 237,336 $ 71,006 — $ 1,359 $ 309,701 Commercial 1,509,374 239,390 — 12,350 1,761,114 Total mortgage loan on real estate 1,746,710 310,396 — 13,709 2,070,815 Consumer: Home equity lines of credit 259,969 19,622 $ 2,753 1,252 283,596 Home equity loans 35,725 3,383 — 1,133 40,241 Other 26,777 2,470 — 66 29,313 Total consumer loans 322,471 25,475 2,753 2,451 353,150 Commercial 198,554 10,350 — 3,781 212,685 Construction: Residential 58,718 137 — 844 59,699 Commercial 55,872 8,971 — — 64,843 Total construction 114,590 9,108 — 844 124,542 Total loans, net of deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Total principal balance of loans owed, net of charge-offs $ 2,389,038 $ 364,451 $ 7,848 $ 23,981 $ 2,785,318 Unamortized net deferred loan fees (6,713 ) — — — (6,713 ) Discounts to principal balance of loans owed, net of charge-offs — (9,122 ) (5,095 ) (3,196 ) (17,413 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Noncovered loans $ 2,382,325 $ 355,329 $ 2,753 $ 17,804 $ 2,758,211 Covered loans — — — 2,981 2,981 Total loans, net of unamortized deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Allowance for loan losses $ (27,180 ) $ (1,406 ) $ (8 ) $ (2,423 ) $ (31,017 ) A summary of loan balances follows (in thousands): December 31, 2016 Originated PNCI PCI - PCI - Total Mortgage loans on real estate: Residential 1-4 $ 229,609 $ 78,935 — $ 1,363 $ 309,907 Commercial 1,484,420 250,037 — 13,460 1,747,917 Total mortgage loan on real estate 1,714,029 328,972 — 14,823 2,057,824 Consumer: Home equity lines of credit 263,590 21,765 $ 2,983 1,377 289,715 Home equity loans 37,074 3,618 — 1,130 41,822 Other 28,167 2,534 — 65 30,766 Total consumer loans 328,831 27,917 2,983 2,572 362,303 Commercial 200,735 12,321 — 3,991 217,047 Construction: Residential 54,613 141 — 675 55,429 Commercial 58,119 8,871 — — 66,990 Total construction 112,732 9,012 — 675 122,419 Total loans, net of deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Total principal balance of loans owed, net of charge-offs $ 2,363,243 $ 388,139 $ 8,280 $ 25,650 $ 2,785,312 Unamortized net deferred loan fees (6,916 ) — — — (6,916 ) Discounts to principal balance of loans owed, net of charge-offs — (9,917 ) (5,297 ) (3,589 ) (18,803 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Noncovered loans $ 2,356,327 $ 378,222 $ 2,983 $ 18,885 $ 2,756,417 Covered loans — — — 3,176 3,176 Total loans, net of unamortized deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Allowance for loan losses $ (28,141 ) $ (1,665 ) $ (17 ) $ (2,680 ) $ (32,503 ) 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, 2017 2016 Change in accretable yield: Balance at beginning of period $ 10,348 $ 13,255 Accretion to interest income (902 ) (1,091 ) Reclassification from (to) nonaccretable difference 114 (184 ) Balance at end of period $ 9,560 $ 11,980

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2017
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, 2017 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 2,387 $ 11,905 $ 7,044 $ 2,617 — $ 622 $ 5,831 $ 1,417 $ 680 $ 32,503 Charge-offs — — (71 ) (31 ) — (174 ) (133 ) — — (409 ) Recoveries — 110 46 12 — 141 170 — 1 480 (Benefit) provision (105 ) (62 ) (489 ) (178 ) — 6 (542 ) (78 ) (109 ) (1,557 ) Ending balance $ 2,282 $ 11,953 $ 6,530 $ 2,420 — $ 595 $ 5,326 $ 1,339 $ 572 $ 31,017 Ending balance: Individ. evaluated for impairment $ 249 $ 124 $ 400 $ 57 — $ 31 $ 811 $ 14 — $ 1,686 Loans pooled for evaluation $ 1,808 $ 10,382 $ 6,122 $ 2,297 — $ 564 $ 3,873 $ 1,282 $ 572 $ 26,900 Loans acquired with deteriorated credit quality $ 225 $ 1,447 $ 8 $ 66 — — $ 642 $ 43 — $ 2,431 Loans, net of unearned fees – As of March 31, 2017 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 309,701 $ 1,761,114 $ 283,596 $ 40,241 — $ 29,313 $ 212,685 $ 59,699 $ 64,843 $ 2,761,192 Individ. evaluated for impairment $ 3,849 $ 16,979 $ 2,204 $ 1,241 — $ 280 $ 3,072 $ 25 — $ 27,650 Loans pooled for evaluation $ 304,493 $ 1,731,785 $ 277,388 $ 37,867 — $ 28,967 $ 205,832 $ 58,830 $ 64,843 $ 2,710,005 Loans acquired with Deteriorated credit quality $ 1,359 $ 12,350 $ 4,004 $ 1,133 — $ 66 $ 3,781 $ 844 — $ 23,537 Allowance for Loan Losses - Year Ended December 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 (321 ) (827 ) (585 ) (219 ) — (823 ) (455 ) — — (3,230 ) Recoveries 880 920 2,317 590 — 449 404 54 78 5,692 (Benefit) provision (679 ) 369 (5,941 ) (892 ) — 308 611 464 (210 ) (5,970 ) Ending balance $ 2,387 $ 11,905 $ 7,044 $ 2,617 — $ 622 $ 5,831 $ 1,417 $ 680 $ 32,503 Ending balance: Individ. evaluated for impairment $ 249 $ 127 $ 410 $ 102 — $ 28 $ 1,130 — — $ 2,046 Loans pooled for evaluation $ 1,952 $ 10,329 $ 6,618 $ 2,451 — $ 594 $ 3,765 $ 1,371 $ 680 $ 27,760 Loans acquired with deteriorated credit quality $ 186 $ 1,449 $ 17 $ 64 — — $ 936 $ 45 — $ 2,697 Loans, net of unearned fees – As of December 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 $ 309,907 $ 1,747,917 $ 289,715 $ 41,822 — $ 30,766 $ 217,047 $ 55,429 $ 66,990 $ 2,759,593 Individ. evaluated for impairment $ 3,785 $ 15,748 $ 3,196 $ 1,150 — $ 154 $ 4,096 $ 11 — $ 28,140 Loans pooled for evaluation $ 304,759 $ 1,718,709 $ 282,159 $ 39,542 — $ 30,547 $ 208,960 $ 54,743 $ 66,990 $ 2,706,409 Loans acquired with deteriorated credit quality $ 1,363 $ 13,460 $ 4,360 $ 1,130 — $ 65 $ 3,991 $ 675 — $ 25,044 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 As part of the on-going (iii) non-performing 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loans: Pass $ 233,189 $ 1,476,126 $ 255,326 $ 32,480 — $ 26,181 $ 187,333 $ 58,707 $ 48,636 $ 2,317,978 Special mention 2,031 21,022 2,401 1,352 — 389 5,222 — 7,236 39,653 Substandard 2,116 12,226 2,242 1,893 — 207 5,999 11 — 24,694 Loss — — — — — — — — — — Total originated $ 237,336 $ 1,509,374 $ 259,969 $ 35,725 — $ 26,777 $ 198,554 $ 58,718 $ 55,872 $ 2,382,325 PNCI loans: Pass $ 68,062 $ 227,038 $ 18,231 $ 3,180 — $ 2,409 $ 10,349 $ 137 $ 8,971 $ 338,377 Special mention 1,723 5,973 688 90 — 58 1 — — 8,533 Substandard 1,221 6,379 703 113 — 3 — — — 8,419 Loss — — — — — — — — — — Total PNCI $ 71,006 $ 239,390 $ 19,622 $ 3,383 — $ 2,470 $ 10,350 $ 137 $ 8,971 $ 355,329 PCI loans $ 1,359 $ 12,350 $ 4,005 $ 1,133 — $ 66 $ 3,781 $ 844 — $ 23,538 Total loans $ 309,701 $ 1,761,114 $ 283,596 $ 40,241 — $ 29,313 $ 212,685 $ 59,699 $ 64,843 $ 2,761,192 Credit Quality Indicators – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loans: Pass $ 224,988 $ 1,457,128 $ 258,024 $ 34,299 — $ 27,542 $ 190,902 $ 54,602 $ 57,808 $ 2,305,293 Special mention 2,225 15,108 2,518 891 — 385 6,133 — 311 27,571 Substandard 2,396 12,184 3,048 1,884 — 240 3,700 11 — 23,463 Loss — — — — — — — — — — Total originated $ 229,609 $ 1,484,420 $ 263,590 $ 37,074 — $ 28,167 $ 200,735 $ 54,613 $ 58,119 $ 2,356,327 PNCI loans: Pass $ 75,600 $ 236,740 $ 20,442 $ 3,492 — $ 2,437 $ 12,320 $ 141 $ 8,871 $ 360,043 Special mention 1,849 6,057 509 41 — 92 1 — — 8,549 Substandard 1,486 7,240 814 85 — 5 — — — 9,630 Loss — — — — — — — — — — Total PNCI $ 78,935 $ 250,037 $ 21,765 $ 3,618 — $ 2,534 $ 12,321 $ 141 $ 8,871 $ 378,222 PCI loans $ 1,363 $ 13,460 $ 4,360 $ 1,130 — $ 65 $ 3,991 $ 675 — $ 25,044 Total loans $ 309,907 $ 1,747,917 $ 289,715 $ 41,822 — $ 30,766 $ 217,047 $ 55,429 $ 66,990 $ 2,759,593 Consumer loans, whether unsecured or secured by real estate, automobiles, or other personal property, are susceptible to three primary risks; non-payment non-payment 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 Commercial real estate loans generally fall into two categories, owner-occupied and non-owner non-owner Construction loans, whether owner occupied or non-owner 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 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 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loan balance: Past due: 30-59 $ 845 $ 1,855 $ 424 $ 640 — $ 119 $ 1,727 — $ 421 $ 6,031 60-89 — 74 461 176 — 9 1,527 — — 2,247 > 90 Days — 1,835 104 319 — 5 570 $ 11 — 2,844 Total past due 845 3,764 989 1,135 — 133 3,824 11 421 11,122 Current 236,491 1,505,610 258,981 34,590 — 26,644 194,730 58,707 55,451 2,371,204 Total orig. loans $ 237,336 $ 1,509,374 $ 259,970 $ 35,725 — $ 26,777 $ 198,554 $ 58,718 $ 55,872 $ 2,382,326 > 90 Days and still accruing — $ 1,712 — — — — $ 125 — — $ 1,837 Nonaccrual loans $ 473 $ 7,485 $ 798 $ 822 — $ 12 $ 1,769 $ 25 — $ 11,384 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. PNCI loan balance: Past due: 30-59 $ 367 $ 669 $ 270 — — $ 3 — — — $ 1,309 60-89 — — — — — — — — — — > 90 Days 63 81 — — — — — — — 144 Total past due 430 750 270 — — 3 — — — 1,453 Current 70,576 238,640 19,352 $ 3,383 — 2,467 $ 10,350 $ 137 $ 8,971 353,876 Total PNCI loans $ 71,006 $ 239,390 $ 19,622 $ 3,383 — $ 2,470 $ 10,350 $ 137 $ 8,971 $ 355,329 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 164 $ 1,760 $ 151 $ 58 — $ 2 — — — $ 2,135 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loan balance: Past due: 30-59 $ 552 $ 317 $ 754 $ 646 — $ 16 $ 1,148 $ 921 — $ 4,354 60-89 139 1,517 — 395 — 30 84 — $ 421 2,586 > 90 Days — 216 687 184 — 15 634 11 — 1,747 Total past due $ 691 $ 2,050 $ 1,441 $ 1,225 — $ 61 $ 1,866 $ 932 $ 421 $ 8,687 Current 228,918 1,482,370 262,149 35,849 — 28,106 198,869 53,681 57,698 2,347,640 Total orig. loans $ 229,609 $ 1,484,420 $ 263,590 $ 37,074 — $ 28,167 $ 200,735 $ 54,613 $ 58,119 $ 2,356,327 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 255 $ 7,736 $ 1,211 $ 718 — $ 33 $ 2,930 $ 11 — $ 12,894 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. PNCI loan balance: Past due: 30-59 $ 1,510 $ 73 $ 274 $ 39 — — — — — $ 1,896 60-89 — — — — — — — — — — > 90 Days 21 81 589 13 — — — — — 704 Total past due $ 1,531 $ 154 $ 863 $ 52 — — — — — $ 2,600 Current 77,404 249,883 20,902 3,566 — $ 2,534 $ 12,321 $ 141 $ 8,871 375,622 Total PNCI loans $ 78,935 $ 250,037 $ 21,765 $ 3,618 — $ 2,534 $ 12,321 $ 141 $ 8,871 $ 378,222 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 194 $ 1,826 $ 742 $ 67 — $ 5 — — — $ 2,834 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 original 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 1,782 $ 14,431 $ 1,064 $ 743 — $ 5 $ 1,289 $ 11 — $ 19,325 Unpaid principal $ 1,793 $ 14,881 $ 1,144 $ 1,085 — $ 6 $ 1,312 $ 16 — $ 20,237 Average recorded Investment $ 2,834 $ 20,770 $ 2,013 $ 845 $ 1 $ 11 $ 932 $ 7 — $ 27,413 Interest income Recognized $ 20 $ 98 $ 6 $ 1 — — $ 7 — — $ 132 With an allowance recorded: Recorded investment $ 1,378 $ 640 $ 427 $ 440 — $ 21 $ 1,783 $ 14 — $ 4,703 Unpaid principal $ 1,382 $ 640 $ 440 $ 443 — $ 22 $ 1,842 $ 14 — $ 4,783 Related allowance $ 172 $ 18 $ 106 $ 57 — $ 14 $ 811 $ 14 — $ 1,192 Average recorded Investment $ 1,692 $ 1,029 $ 1,076 $ 557 — $ 11 $ 1,938 $ 7 — $ 6,310 Interest income Recognized $ 11 $ 9 $ 1 $ 5 — — $ 14 — — $ 40 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 433 $ 1,777 $ 220 $ 58 — $ 138 — — — $ 2,626 Unpaid principal $ 455 $ 2,011 $ 233 $ 67 — $ 139 — — — $ 2,905 Average recorded Investment $ 654 $ 1,455 $ 337 $ 64 — $ 86 $ 1 — $ 245 $ 2,842 Interest income Recognized $ 2 — $ 1 — — $ 2 — — — $ 5 With an allowance recorded: Recorded investment $ 256 $ 131 $ 493 — — $ 116 — — — $ 996 Unpaid principal $ 256 $ 131 $ 493 — — $ 116 — — — $ 996 Related allowance $ 77 $ 106 $ 295 — — $ 16 — — — $ 494 Average recorded Investment $ 128 $ 1,440 $ 550 $ 19 — $ 175 — — — $ 2,312 Interest income Recognized $ 2 $ 2 $ 5 — — $ 1 — — — $ 10 Impaired Originated Loans – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 1,691 $ 13,144 $ 1,480 $ 598 — $ 15 $ 762 $ 11 — $ 17,701 Unpaid principal $ 1,699 $ 13,488 $ 1,561 $ 922 — $ 29 $ 926 $ 16 — $ 18,641 Average recorded Investment $ 2,788 $ 20,126 $ 2,221 $ 773 $ 1 $ 16 $ 669 $ 7 — $ 26,601 Interest income Recognized $ 83 $ 581 $ 40 $ 4 — $ 1 $ 48 — — $ 757 With an allowance recorded: Recorded investment $ 1,372 $ 646 $ 430 $ 485 — $ 18 $ 3,334 — — $ 6,285 Unpaid principal $ 1,372 $ 646 $ 440 $ 487 — $ 19 $ 3,385 — — $ 6,349 Related allowance $ 170 $ 19 $ 110 $ 102 — $ 13 $ 1,130 — — $ 1,544 Average recorded Investment $ 1,689 $ 1,032 $ 1,077 $ 579 — $ 9 $ 2,714 — — $ 7,100 Interest income Recognized $ 56 $ 37 $ 9 $ 25 — $ 2 $ 77 — — $ 206 Impaired PNCI Loans – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 463 $ 1,826 $ 735 $ 67 — $ 3 — — — $ 3,094 Unpaid principal $ 486 $ 2,031 $ 746 $ 74 — $ 4 — — — $ 3,341 Average recorded Investment $ 669 $ 1,479 $ 594 $ 69 — $ 18 $ 1 — $ 245 $ 3,075 Interest income Recognized $ 7 — $ 9 $ 1 — — — — — $ 17 With an allowance recorded: Recorded investment $ 259 $ 132 $ 551 — — $ 118 — — — $ 1,060 Unpaid principal $ 259 $ 132 $ 551 — — $ 118 — — — $ 1,060 Related allowance $ 79 $ 108 $ 300 — — $ 15 — — — $ 502 Average recorded Investment $ 130 $ 1,440 $ 579 $ 19 — $ 176 — — — $ 2,344 Interest income Recognized $ 10 $ 7 $ 27 — — $ 5 — — — $ 49 Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. 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 C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. 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 At March 31, 2017, $12,285,000 of originated loans were TDR and classified as impaired. The Company had obligations to lend $70,000 of additional funds on these TDR as of March 31, 2017. At March 31, 2017, $1,470,000 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, 2017. At December 31, 2016, $12,371,000 of Originated loans were TDRs and classified as impaired. The Company had obligations to lend $25,000 of additional funds on these TDRs as of December 31, 2016. At December 31, 2016, $1,324,000 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, 2016. 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. 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (dollars in thousands) Resid. Comm. Lines Loans Resid. Comm. Number — — 1 — — 1 1 — — 3 Pre-mod — — $ 20 — — $ 14 $ 100 — — $ 134 Post-mod — — $ 20 — — $ 14 $ 100 — — $ 134 Financial impact due to TDR taken as additional provision — — — — — $ 11 $ 94 — — $ 105 Number that defaulted during the period — 1 — — — — — — — 1 Recorded investment of TDRs that defaulted during the period — $ 124 — — — — — — — $ 124 Financial impact due to 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (dollars in thousands) Resid. Comm. Lines Loans Resid. Comm. Number — 2 1 1 — — 1 — — 5 Pre-mod — $ 78 $ 132 $ 105 — — $ 12 — — $ 327 Post-mod — $ 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 — — — — — — — — — — Financial impact due to 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, 2017
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, 2017 Three months ended March 31, 2016 Noncovered Covered Total Noncovered Covered Total Beginning balance, net $ 3,763 $ 223 $ 3,986 $ 5,369 — $ 5,369 Additions/transfers from loans 85 — 85 416 — 416 Dispositions/sales (385 ) (223 ) (608 ) (1,325 ) — (1,325 ) Valuation adjustments 66 — 66 11 — 11 Ending balance, net $ 3,529 — $ 3,529 $ 4,471 — $ 4,471 Ending valuation allowance $ (300 ) — $ (300 ) $ 572 — $ 572 Ending number of foreclosed assets 12 — 12 21 21 Proceeds from sale of foreclosed assets $ 510 $ 216 $ 726 $ 1,417 — $ 1,417 Gain on sale of foreclosed assets $ 125 $ (7 ) $ 118 $ 92 — $ 92 As of March 31, 2017, $1,207,000 of foreclosed residential real estate properties, all of which the Company has obtained physical possession of, are included in foreclosed assets. At March 31, 2017, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are underway is $160,000.

Premises and Equipment

Premises and Equipment	3 Months Ended
	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 7 - Premises and Equipment Premises and equipment were comprised of: March 31, December 31, 2017 2016 (In thousands) Land & land improvements $ 9,522 $ 9,522 Buildings 43,600 42,345 Furniture and equipment 33,077 31,428 86,199 83,295 Less: Accumulated depreciation (38,719 ) (37,412 ) 47,480 45,883 Construction in progress 2,028 2,523 Total premises and equipment $ 49,508 $ 48,406 Depreciation expense for premises and equipment amounted to $1,311,000 and $1,271,000 for the three months ended March 31, 2017 and 2016, respectively.

Cash Value of Life Insurance

Cash Value of Life Insurance	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Beginning balance $ 95,912 $ 94,560 Increase in cash value of life insurance 685 696 Gain on death benefit 107 Insurance proceeds receivable reclassified to other assets (921 ) — Ending balance $ 95,783 $ 95,256 End of period death benefit $ 164,574 $ 166,216 Number of policies owned 183 187 Insurance companies used 14 14 Current and former employees and directors covered 58 59 As of March 31, 2017, the Bank was the owner and beneficiary of 183 life insurance policies, issued by 14 life insurance companies, covering 58 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

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2017
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: March 31, December 31, (dollar in thousands) 2017 Additions Reductions 2016 Goodwill $ 64,311 — — $ 64,311 The following table summarizes the Company’s core deposit intangibles as of the dates indicated: March 31, Reductions/ Fully December 31, (dollar in thousands) 2017 Additions Amortization Depreciated 2016 Core deposit intangibles $ 10,120 — — — $ 10,120 Accumulated amortization (3,916 ) — $ (359 ) — (3,557 ) Core deposit intangibles, net $ 6,204 — $ (359 ) — $ 6,563 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 remaining estimated core deposit intangible amortization (dollars in thousands): Estimated Core Deposit Years Ended Intangible Amortization 2017 $ 1,030 2018 1,324 2019 1,228 2020 1,228 2021 969 Thereafter 425

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Mortgage Servicing Rights	Note 10 - Mortgage Servicing Rights The following tables summarize the activity in, and the main assumptions used to determine the fair value of mortgage servicing rights (“MSRs”) for the periods indicated (dollars in thousands): Three months ended March 31, 2017 2016 Balance at beginning of period $ 6,595 $ 7,618 Additions 278 220 Change in fair value (13 ) (698 ) Balance at end of period $ 6,860 $ 7,140 Contractually specified servicing fees, late fees and ancillary fees earned $ 521 $ 517 Balance of loans serviced at: Beginning of period $ 816,623 $ 817,917 End of period $ 822,506 $ 813,800 Weighted-average prepayment speed (CPR) 8.3 % 11.6 % Weighted-average discount rate 14.0 % 10.0 % The changes in fair value of MSRs that occurred during the three months ended March 31, 2017 and 2016 were mainly due to changes in principal balances, changes in mortgage prepayment speeds, and changes in investor required rate of return, or discount rate, of the MSRs.

Indemnification Asset

Indemnification Asset	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Beginning balance $ (744 ) $ (521 ) Effect of actual and estimated future covered losses and recoveries (191 ) (111 ) Reimbursable (revenue) expenses incurred (32 ) (4 ) Payments made to (received from) FDIC 72 29 Ending balance $ (895 ) $ (607 ) Amount of indemnification asset (liability) recorded in other assets $ (179 ) $ 11 Amount of indemnification asset (liability) recorded in other liabilities (716 ) (618 ) Ending balance $ (895 ) $ (607 )

Other Assets

Other Assets	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Deferred tax asset, net $ 35,764 $ 36,199 Prepaid expense 4,219 3,045 Software 1,805 2,039 Advanced compensation 220 249 Capital Trusts 1,733 1,702 Investment in Low Housing Tax Credit Funds 18,184 18,465 Life insurance proceeds receivable 2,759 2,120 Tax refund receivable — 6,460 Premises held for sale — 2,896 Miscellaneous other assets 1,970 1,568 Total other assets $ 66,654 $ 74,743

Deposits

Deposits	3 Months Ended
	Mar. 31, 2017
Banking and Thrift [Abstract]
Deposits	Note 13 - Deposits A summary of the balances of deposits follows (in thousands): March 31 December 31, 2017 2016 Noninterest-bearing demand $ 1,254,431 $ 1,275,745 Interest-bearing demand 947,006 887,625 Savings 1,370,015 1,397,036 Time certificates, over $250,000 76,372 75,184 Other time certificates 251,060 259,970 Total deposits $ 3,898,884 $ 3,895,560 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, 2017 and December 31, 2016. 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 $985,000 and $1,191,000 were classified as consumer loans at March 31, 2017 and December 31, 2016, respectively.

Reserve for Unfunded Commitment

Reserve for Unfunded Commitments	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Balance at beginning of period $ 2,719 $ 2,475 Provision for losses – Unfunded commitments 15 — Balance at end of period $ 2,734 $ 2,475

Other Liabilities

Other Liabilities	3 Months Ended
	Mar. 31, 2017
Other Liabilities Disclosure [Abstract]
Other Liabilities	Note 15 – Other Liabilities Other liabilities were comprised of (in thousands): March 31, December 31, 2017 2016 Deferred compensation $ 6,683 $ 6,525 Pension liability 26,868 26,645 Joint beneficiary agreements 3,069 3,007 Low income housing tax credit fund commitments 14,380 15,176 Accrued salaries and benefits expense 6,742 5,704 Loan escrow and servicing payable 1,140 2,146 Litigation contingency 1,450 1,450 Taxes payable 546 — Miscellaneous other liabilities 6,060 6,711 Total other liabilities $ 66,938 $ 67,364

Other Borrowings

Other Borrowings	3 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Other Borrowings	Note 16 - Other Borrowings A summary of the balances of other borrowings follows: March 31, December 31, 2017 2016 (in thousands) Other collateralized borrowings, fixed rate, as of March 31, 2017 of 0.05%, payable on April 3, 2017 $ 15,197 $ 17,493 Total other borrowings $ 15,197 $ 17,493 The Company did not enter into any repurchase agreements during the three months ended March 31, 2017 or the year ended December 31, 2016. The Company had $15,197,000 and $17,493,000 of other collateralized borrowings at March 31, 2017 and December 31, 2016, respectively. Other collateralized borrowings are generally overnight maturity borrowings from non-financial 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, 2017, this line provided for maximum borrowings of $1,302,432,000 of which none was outstanding, leaving $1,302,432,000 available. As of March 31, 2017, the Company has designated investment securities with fair value of $72,323,000 and loans totaling $1,881,915,000 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, 2017, this line provided for maximum borrowings of $127,355,000 of which none was outstanding, leaving $127,355,000 available. As of March 31, 2017, the Company has designated investment securities with fair value of $20,000 and loans totaling $220,287,000 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 $20,000,000 for federal funds transactions at March 31, 2017.

Junior Subordinated Debt

Junior Subordinated Debt	3 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Junior Subordinated Debt	Note 17 – Junior Subordinated Debt At March 31, 2017, the Company had five wholly-owned subsidiary business trusts that had issued $62.9 million of trust preferred securities (the “Capital Trusts”). Trust preferred securities accrue and pay distributions periodically at specified annual rates as provided in the indentures. The trusts used the net proceeds from the offering to purchase a like amount of subordinated debentures (the “Debentures”) of the Company. The Debentures are the sole assets of the trusts. The Company’s obligations under the subordinated debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the obligations of the trusts. The trust preferred securities are mandatorily redeemable upon the maturity of the Debentures, or upon earlier redemption as provided in the indentures. The Company has the right to redeem the Debentures in whole (but not in part) on or after specific dates, at a redemption price specified in the indentures plus any accrued but unpaid interest to the redemption date. The Company also has a right to defer consecutive payments of interest on the debentures for up to five years. The Company organized two of the Capital Trusts. The Company acquired its three other Capital Trusts and assumed their related Debentures as a result of its acquisition of North Valley Bancorp. At the acquisition date of October 3, 2014, the Debentures associated with North Valley Bancorp’s three Capital Trusts 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 interests in each of the acquired Capital Trusts and these discounts will be proportionally amortized over the remaining time to maturity for each related debenture. The recorded book values of the 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): Subordinated Debt Series Maturity Face Coupon Rate As of March 31, 2017 December 31, 2016 Current Recorded Recorded Coupon Rate Book Value Book Value TriCo Cap Trust I 10/7/2033 $ 20,619 3.05 % 4.07 % $ 20,619 $ 20,619 TriCo Cap Trust II 7/23/2034 20,619 2.55 % 3.59 % 20,619 20,619 North Valley Trust II 4/24/2033 6,186 3.25 % 4.29 % 5,105 5,095 North Valley Trust III 4/24/2034 5,155 2.80 % 3.84 % 4,013 4,005 North Valley Trust IV 3/15/2036 10,310 1.33 % 2.46 % 6,357 6,329 $ 62,889 $ 56,713 $ 56,667 During the three months ended March 31, 2017, the balance of Junior Subordinated Debt increased $46,000 to $56,713,000 due to purchase fair value discount amortization.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18 - Commitments and Contingencies Restricted Cash Balances Lease Commitments non-cancelable At December 31, 2016, future minimum commitments under non-cancelable Operating Leases (in thousands) 2017 $ 3,320 2018 2,523 2019 1,924 2020 1,325 2021 963 Thereafter 1,696 Future minimum lease payments $ 11,751 Rent expense under operating leases was $1,047,000 and $981,000 during the three months ended March 31, 2017 and 2016, respectively. Rent expense was offset by rent income of $13,000 and $58,000 during the three months ended March 31, 2017 and 2016, respectively. Financial Instruments with Off-Balance-Sheet off-balance 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 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 $ 228,892 $ 220,836 Consumer loans 412,821 406,855 Real estate mortgage loans 38,589 42,184 Real estate construction loans 88,301 97,399 Standby letters of credit 11,639 12,763 Deposit account overdraft privilege 99,029 98,583 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 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 in-store non-exempt non-binding In addition to this, on January 20, 2015, a then-current Personal Banker at one of the Bank’s in-store non-exempt non-binding As part of the mediations, which took place concurrently, the Bank agreed in principal to settle the two matters. In connection with the settlement and in consideration of a full release of all claims raised in both the actions, the Bank has agreed to pay up to $1.9 million though the actual cost of the settlement will depend on the number of claims submitted by the members of the purported classes. As a result, the Bank estimates the actual cost of the settlement may be approximately $1,450,000, and recorded such estimate. The settlement is subject to customary conditions, including court approval following notice to the members of the purported classes. Provided the parties can agree on the language to be included in the settlement agreement and then enter into a stipulation regarding the settlement, court hearings will be scheduled where the court will consider the terms of the settlement. But it should be noted there are no assurances the court will approve the settlement even if the parties enter into such a stipulation. Neither the Company nor its subsidiaries are a party to any other pending legal proceedings that are material, nor is their property the subject of any other material pending legal proceeding at this time. All other legal proceedings are routine and arise out of the ordinary course of the Bank’s business. None of those proceedings are currently expected to have a material adverse impact upon the Company’s and the Bank’s business, their consolidated financial position nor their operations in any material amount not already accrued, after taking into consideration any applicable insurance. Other Commitments and Contingencies The Bank owns 13,396 shares of Class B common stock of Visa Inc. which are convertible into Class A common stock at a conversion ratio of 1.648265 per Class B share. As of March 31, 2017, the value of the Class A shares was $88.87 per share. Utilizing the conversion ratio, the value of unredeemed Class A equivalent shares owned by the Bank was $1,962,000 as of March 31, 2017, and has not been reflected in the accompanying financial statements. The shares of Visa Class B common stock are restricted and may not be transferred. Visa Member Banks are required to fund an escrow account to cover settlements, resolution of pending litigation and related claims. If the funds in the escrow account are insufficient to settle all the covered litigation, Visa may sell additional Class A shares, use the proceeds to settle litigation, and further reduce the conversion ratio. If funds remain in the escrow account after all litigation is settled, the Class B conversion ratio will be increased to reflect that surplus. 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, 2017
Equity [Abstract]
Shareholders' Equity	Note 19 – Shareholders’ Equity Dividends Paid The Bank paid to the Company cash dividends in the aggregate amounts of $4,042,000 and $3,680,000 during the three months ended March 31, 2017 and 2016, 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, 2016, the Bank could have paid dividends of $82,615,000 to the Company without the approval of the Commissioner of the Department of Business Oversight. 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, 2017, the Company had repurchased 166,600 shares under this plan. Stock Repurchased Under Equity Compensation Plans During the three months ended March 31, 2017 and 2016, employees tendered 16,251 and 0 shares, respectively, of the Company’s common stock with market value of $604,000, and $0, respectively, in lieu of cash to exercise options to purchase shares of the Company’s stock and to pay income taxes related to equity compensation plan instruments 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, 2017
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, 2017, 475,900 options for the purchase of common shares, and 116,593 restricted stock units were outstanding, and 635,220 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, 2017, 94,900 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, 2017 is summarized in the following table: Number of Shares Option Price per Share Weighted Average Exercise Price Weighted Average Fair Value on Date of Grant Outstanding at December 31, 2016 592,250 $12.63 to $23.21 $ 17.12 Options granted — — to — — — Options exercised (21,450 ) $14.54 to $22.54 $ 20.30 Options forfeited — — to — — Outstanding at March 31, 2017 570,800 $12.63 to $23.21 $ 17.00 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, 2017: Currently Exercisable Currently Not Exercisable Total Outstanding Number of options 499,200 71,600 570,800 Weighted average exercise price $ 16.77 $ 18.64 $ 17.00 Intrinsic value (in thousands) $ 9,367 $ 1,209 $ 10,576 Weighted average remaining contractual term (yrs.) 3.9 6.0 4.2 The 71,600 options that are currently not exercisable as of March 31, 2017 are expected to vest, on a weighted-average basis, over the next 1.0 years, and the Company is expected to recognize $280,000 of pre-tax 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 Number Weighted Outstanding at December 31, 2016 68,450 47,426 RSUs granted 730 $ 36.47 — RSUs added through dividend credits 291 — RSUs released (304 ) — RSUs forfeited/expired — — Outstanding at March 31, 2017 69,167 47,426 The 69,167 of service condition vesting RSUs outstanding as of March 31, 2017 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 69,167 of service condition vesting RSUs outstanding as of March 31, 2017 are expected to vest, and be released, on a weighted-average basis, over the next 1.2 years. The Company expects to recognize $1,116,000 of pre-tax The 47,426 of market plus service condition vesting RSUs outstanding as of March 31, 2017 are expected to vest, and be released, on a weighted-average basis, over the next 1.3 years. The Company expects to recognize $476,000 of pre-tax

Noninterest Income and Expense

Noninterest Income and Expense	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Service charges on deposit accounts $ 3,619 $ 3,365 ATM and interchange fees 4,015 3,393 Other service fees 765 728 Mortgage banking service fees 521 517 Change in value of mortgage servicing rights (13 ) (698 ) Total service charges and fees 8,907 7,305 Gain on sale of loans 910 803 Commissions on sale of non-deposit 607 532 Increase in cash value of life insurance 685 696 Change in indemnification asset (221 ) (115 ) Gain on sale of foreclosed assets 118 92 Sale of customer checks 104 119 Lease brokerage income 206 195 Loss on disposal of fixed assets — (31 ) Life insurance proceeds in excess of cash value 107 — Other 280 194 Total other noninterest income 2,796 2,485 Total noninterest income $ 11,703 $ 9,790 Mortgage loan servicing fees, net of change in fair value of mortgage loan servicing rights, totaling $508,000 and $(181,000) were recorded in service charges and fees noninterest income for the three months ended March 31, 2017 and 2016, respectively. The components of noninterest expense were as follows (in thousands): Three months ended March 31, 2017 2016 Base salaries, net of deferred loan origination costs $ 13,390 $ 12,708 Incentive compensation 2,198 1,739 Benefits and other compensation costs 5,305 4,818 Total salaries and benefits expense 20,893 19,265 Occupancy 2,692 2,308 Equipment 1,723 1,386 Data processing and software 2,396 1,843 ATM and POS network charges 853 1,229 Telecommunications 643 685 Postage 404 463 Courier service 254 271 Advertising 967 895 Assessments 405 632 Operational losses 435 164 Professional fees 766 809 Foreclosed assets expense 38 46 Reversal of foreclosed asset losses (66 ) (11 ) Change in reserve for unfunded commitments 15 — Intangible amortization 359 299 Merger and acquisition expense — 622 Other miscellaneous expense 3,045 2,845 Total other noninterest expense 14,929 14,486 Total noninterest expense $ 35,822 $ 33,751 Merger and acquisition expense: Base salaries (outside temporary help) — $ 187 Data processing and software — — Professional fees — 180 Advertising and marketing — 114 Other miscellaneous expense — 141 Total merger and acquisition expense — $ 622

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Federal statutory income tax rate 35.0 % 35.0 % State income taxes, net of federal tax benefit 6.9 6.3 Tax-exempt (1.9 ) (1.8 ) Increase in cash value of insurance policies (1.4 ) (1.4 ) Tax credits (0.4 ) — Equity compensation (0.5 ) — Other 0.1 — Effective Tax Rate 37.8 % 38.1 %

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Note 23 – Earnings Per Share Basic earnings per share represent income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect 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 March 31, (In thousands) 2017 2016 Net income $ 12,079 $ 10,674 Average number of common shares outstanding 22,870 22,783 Effect of dilutive stock options and restricted stock 362 263 Average number of common shares outstanding used to calculate diluted earnings per share 23,232 23,046 Options excluded from diluted earnings per share because the effect of these options was antidilutive — 23

Comprehensive Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2017
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 Three Months Ended March 31, 2017 2016 (in thousands) Unrealized holding gains (losses) on available for sale securities before reclassifications $ 787 $ 6,125 Amounts reclassified out of accumulated other comprehensive income- — — Unrealized holding gains (losses) on available for sale securities after reclassifications 787 6,125 Tax effect (330 ) (2,575 ) Unrealized holding gains (losses) on available for sale securities, net of tax 457 3,550 Change in unfunded status of the supplemental retirement plans before reclassifications — — Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost (3 ) — Amortization of actuarial losses 96 — Total amounts reclassified out of accumulated other comprehensive income 93 — Change in unfunded status of the supplemental retirement plans after reclassifications — Tax effect (39 ) — Change in unfunded status of the supplemental retirement plans, net of tax 54 — 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) $ 511 $ 3,550 The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: March 31, December 31, 2017 2016 (in thousands) Net unrealized loss on available for sale securities $ (8,083 ) $ (8,870 ) Tax effect 3,399 3,729 Unrealized holding loss on available for sale securities, net of tax (4,684 ) (5,141 ) Unfunded status of the supplemental retirement plans (4,621 ) (4,714 ) Tax effect 1,943 1,982 Unfunded status of the supplemental retirement plans, net of tax (2,678 ) (2,732 ) Joint beneficiary agreement liability (40 ) (40 ) Tax effect — — Joint beneficiary agreement liability, net of tax (40 ) (40 ) Accumulated other comprehensive loss $ (7,402 ) $ (7,913 )

Retirement Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Retirement Plans	Note 25 - Retirement Plans 401(k) Plan The Company sponsors a 401(k) Plan that allows participants to 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 $186,000, and $160,000 of salaries & benefits expense attributable to the 401(k) Plan matching contributions during the three months ended March 31, 2017 and 2016, respectively. The Company made contributions to the 401(k) Plan of $179,000 and $293,000 during the three months ended March 31, 2017 and 2016, 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 $525,000 and $441,000 during the three months ended March 31, 2017 and 2016, 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 $6,683,000 and $6,525,000 at March 31, 2017 and December 31, 2016, respectively. Earnings credits on deferred balances totaling $145,000 and $126,000 during the three months ended March 31, 2017 and 2016, 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 Three months ended March 31, 2017 2016 (In thousands) Net pension cost included the following components: Service cost-benefits earned during the period $ 235 $ 260 Interest cost on projected benefit obligation 249 256 Amortization of net obligation at transition 1 — Amortization of prior service cost (3 ) (10 ) Recognized net actuarial loss 96 138 Net periodic pension cost $ 578 $ 644 During the three months ended March 31, 2017 and 2016, the Company contributed and paid out as benefits $259,000 and $269,000, respectively, to participants under the plans. For the year ending December 31, 2017, the Company expects to contribute and pay out as benefits $1,067,000 to participants under the plans.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2017
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, 2015 $ 4,201 Advances/new loans 730 Removed/payments (2,499 ) Balance December 31, 2016 2,432 Advances/new loans 160 Removed/payments (19 ) Balance March 31, 2017 $ 2,573

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2017
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 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 over-the-counter 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, 2017 Total Level 1 Level 2 Level 3 Securities available for sale: Obligations of U.S. government corporations and agencies $ 450,616 — $ 450,616 — Obligations of states and political subdivisions 118,165 — 118,165 — Corporate debt securities — — — — Marketable equity services 2,938 $ 2,938 — — Mortgage servicing rights 6,860 — — $ 6,860 Total assets measured at fair value $ 578,579 $ 2,938 $ 568,781 $ 6,860 Fair value at December 31, 2016 Total Level 1 Level 2 Level 3 Securities available-for-sale: Obligations of U.S. government corporations and agencies $ 429,678 — $ 429,678 — Obligations of states and political subdivisions 117,617 — 117,617 — Marketable equity securities 2,938 $ 2,938 — — Mortgage servicing rights 6,595 — — $ 6,595 Total assets measured at fair value $ 556,828 $ 2,938 $ 547,295 $ 6,595 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, 2017 or the year ended December 31, 2016. 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): Three months ended March 31, Beginning Transfers Change Issuances Ending 2017: Mortgage servicing rights $ 6,595 — $ (13 ) $ 278 $ 6,860 2016: Mortgage servicing rights $ 7,618 — $ (698 ) $ 220 $ 7,140 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, 2017: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,860 Discounted cash flow Constant prepayment rate 6.2%-18.8%, 8.3% Discount rate 14.0%-16.0%, 14.0% The following table presents quantitative information about recurring Level 3 fair value measurements at December 31, 2016: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,595 Discounted cash flow Constant prepayment rate 6.9%-16.6%, 8.8% Discount rate 14.0%-16.0%, 14.0% 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): Three months ended March 31, 2017 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Impaired Originated & PNCI loans $ 824 — — $ 824 $ 30 Foreclosed assets 1,528 — — 1,528 (22 ) Total assets measured at fair value $ 2,352 — — $ 2,352 $ 8 Year ended December 31, 2016 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 1,107 — — $ 1,107 $ (409 ) Foreclosed assets 2,253 2,253 (86 ) Total assets measured at fair value $ 3,360 — — $ 3,360 $ (495 ) Three months ended March 31, 2016 Total Level 1 Level 2 Level 3 Total Gains 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 ) 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 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 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 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, 2017: Fair Value Valuation Unobservable Inputs Range, Weighted Average Impaired Originated & PNCI loans $ 824 Sales comparison Adjustment for differences between comparable sales (20.7)%-46.3%, 1.9% Income approach Capitalization rate N/A Foreclosed assets — Sales comparison Adjustment for differences between comparable sales N/A Foreclosed assets (residential $ 657 Sales comparison Adjustment for differences between comparable sales (22.6)%-14.3%, 0.1% Foreclosed assets $ xxx Sales comparison Adjustment for differences between comparable sales (65.0)%-62.5%, (6.9)% 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, 2016: Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 1,107 Sales comparison Income approach Adjustment for differences between comparable sales Capitalization rate Not meaningful N/A Foreclosed assets $ 15 Sales comparison Adjustment for differences between comparable sales Not meaningful Foreclosed assets (residential $ 1,564 Sales comparison Adjustment for differences between comparable sales Not meaningful Foreclosed assets $ 674 Sales comparison Adjustment for differences between comparable sales Not meaningful 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 over-the-counter 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, 2017 December 31, 2016 Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 113,569 $ 113,569 $ 92,197 $ 92,197 Cash at Federal Reserve and other banks 210,137 210,137 213,415 213,415 Level 2 inputs: Securities held to maturity 580,137 581,816 602,536 603,203 Restricted equity securities 16,956 N/A 16,956 N/A Loans held for sale 1,176 1,176 2,998 2,998 Level 3 inputs: Loans, net 2,730,175 2,758,388 2,727,090 2,763,473 Financial liabilities: Level 2 inputs: Deposits 3,898,884 3,897,029 3,895,560 3,893,941 Other borrowings 15,197 15,197 17,493 17,493 Level 3 inputs: Junior subordinated debt $ 56,713 $ 51,177 $ 56,667 $ 49,033 Contract Fair Contract Fair Off-balance Level 3 inputs: Commitments $ 768,603 $ 7,686 $ 767,274 $ 7,673 Standby letters of credit $ 11,639 $ 116 $ 12,763 $ 128 Overdraft privilege commitments $ 99,029 $ 990 $ 98,583 $ 986

TriCo Bancshares Condensed Fina

TriCo Bancshares Condensed Financial Statements (Parent Only)	3 Months Ended
	Mar. 31, 2017
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, (In thousands) Assets Cash and Cash equivalents $ 2,840 $ 2,802 Investment in Tri Counties Bank 539,273 529,907 Other assets 1,738 1,711 Total assets $ 543,851 $ 534,420 Liabilities and shareholders’ equity Other liabilities $ 420 $ 406 Junior subordinated debt 56,713 56,667 Total liabilities 57,133 57,073 Shareholders’ equity: Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,873,305 and 22,867,802 shares, respectively 253,456 252,820 Retained earnings 240,664 232,440 Accumulated other comprehensive loss, net (7,402 ) (7,913 ) Total shareholders’ equity 486,718 477,347 Total liabilities and shareholders’ equity $ 543,851 $ 534,420 Condensed Statements of Income Three months ended March 31, 2017 2016 (In thousands) Interest expense $ 595 $ 535 Administration expense 159 149 Loss before equity in net income of Tri Counties Bank (754 ) (684 ) Equity in net income of Tri Counties Bank: Distributed 4,042 3,680 Under distributed 8,474 7,390 Income tax benefit 317 288 Net income $ 12,079 $ 10,674 Condensed Statements of Comprehensive Income Three months ended March 31, 2017 2016 (In thousands) Net income $ 12,079 $ 10,674 Other comprehensive loss, net of tax: Increase (decrease) in unrealized gains on available for sale securities arising during the period 457 3,550 Change in minimum pension liability 54 — Other comprehensive loss 511 3,550 Comprehensive income $ 12,590 $ 14,224 Condensed Statements of Cash Flows Three months ended March 31, 2017 2016 (In thousands) Operating activities: Net income $ 12,079 $ 10,674 Adjustments to reconcile net income to net cash provided by operating activities: Under distributed equity in earnings of Tri Counties Bank (8,474 ) (7,390 ) Equity compensation vesting expense 381 331 Stock option excess tax benefits — (10 ) Net change in other assets and liabilities (348 ) (249 ) Net cash provided by operating activities 3,638 3,356 Investing activities: None Financing activities: Stock option excess tax benefits — 10 Issuance of common stock through option exercise — 173 Repurchase of common stock (169 ) — Cash dividends paid — common (3,431 ) (3,418 ) Net cash used for financing activities (3,600 ) (3,235 ) Net change in cash and cash equivalents 38 121 Cash and cash equivalents at beginning of year 2,802 2,565 Cash and cash equivalents at end of year $ 2,840 $ 2,686

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2017
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 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. The following tables present actual and required capital ratios as of March 31, 2017 and December 31, 2016 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, 2017 (1.25%) and December 31, 2016 (0.625%) based on the then phased-in phased-in. Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of March 31, 2017: Total Capital (to Risk Weighted Assets): Consolidated $ 509,690 14.86 % $ 317,437 9.25 % $ 360,237 10.50 % N/A N/A Tri Counties Bank $ 507,235 14.79 % $ 317,276 9.25 % $ 360,054 10.50 % $ 342,909 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 475,939 13.87 % $ 248,802 7.25 % $ 291,620 8.50 % N/A N/A Tri Counties Bank $ 473,484 13.81 % $ 248,676 7.25 % $ 291,473 8.50 % $ 274,327 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 421,698 12.29 % $ 197,325 5.75 % $ 240,158 7.00 % N/A N/A Tri Counties Bank $ 473,484 13.81 % $ 197,225 5.75 % $ 240,036 7.00 % $ 222,891 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 475,939 10.77 % $ 176,753 4.00 % $ 176,753 4.00 % N/A N/A Tri Counties Bank $ 473,484 10.72 % $ 176,749 4.00 % $ 176,749 4.00 % $ 220,936 5.00 % Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2016: Total Capital (to Risk Weighted Assets): Consolidated $ 503,283 14.65 % $ 296,336 8.625 % $ 360,756 10.50 % N/A N/A Tri Counties Bank $ 500,876 14.59 % $ 296,188 8.625 % $ 360,577 10.50 % $ 343,407 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 468,061 13.62 % $ 227,620 6.625 % $ 292,041 8.50 % N/A N/A Tri Counties Bank $ 465,654 13.56 % $ 227,507 6.625 % $ 291,896 8.50 % $ 274,725 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 414,632 12.07 % $ 176,084 5.125 % $ 240,504 7.00 % N/A N/A Tri Counties Bank $ 465,654 13.56 % $ 175,996 5.125 % $ 240,385 7.00 % $ 223,214 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 468,061 10.62 % $ 176,346 4.00 % $ 176,346 4.00 % N/A N/A Tri Counties Bank $ 465,654 10.56 % $ 176,341 4.00 % $ 176,341 4.00 % $ 220,426 5.00 % As of March 31, 2017, 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. Also, at March 31, 2017 and December 31, 2016, the Bank’s capital levels exceeded the minimum amounts necessary to be considered well capitalized under the current regulatory framework for prompt corrective action. Beginning January 1, 2016, the Basel III Capital Rules implemented a requirement for all banking organizations to maintain a capital conservation buffer above the minimum risk-based capital requirements in order to avoid certain limitations on capital distributions, stock repurchases and discretionary bonus payments to executive officers. The capital conservation buffer is exclusively composed of common equity tier 1 capital, and it applies to each of the risk-based capital ratios but not the leverage ratio. At March 31, 2017, the Company and the Bank are in compliance with the capital conservation buffer requirement. The three risk-based capital ratios will increase by 0.625% each year through 2019, at which point, the common equity tier 1 risk-based, tier 1 risk-based and total risk-based capital ratio minimums will be 7.0%, 8.5% and 10.5%, respectively.

Summary of Quarterly Results of

Summary of Quarterly Results of Operations (unaudited)	3 Months Ended
	Mar. 31, 2017
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. 2017 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 $ 112 Discount accretion PCI – other 631 Discount accretion PNCI 798 All other loan interest income 33,373 Total loan interest income 34,914 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,570 Total interest income 43,484 Interest expense 1,491 Net interest income 41,993 (Benefit from reversal of) provision for loan losses (1,557 ) Net interest income after provision for loan losses 43,550 Noninterest income 11,703 Noninterest expense 35,822 Income before income taxes 19,431 Income tax expense 7,352 Net income $ 12,079 Per common share: Net income (diluted) $ 0.52 Dividends $ 0.15 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 $ 483 $ 777 $ 426 $ 269 Discount accretion PCI – other 658 569 415 (45 ) Discount accretion PNCI 637 883 1,459 868 All other loan interest income 34,463 33,540 32,038 33,646 Total loan interest income 36,241 35,769 34,338 34,738 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,374 7,940 8,252 8,056 Total interest income 44,615 43,709 42,590 42,794 Interest expense 1,460 1,439 1,430 1,392 Net interest income 43,155 42,270 41,160 41,402 (Benefit from reversal of) provision for loan losses (1,433 ) (3,973 ) (773 ) 209 Net interest income after provision for loan losses 44,588 46,243 41,933 41,193 Noninterest income 12,462 11,066 11,245 9,790 Noninterest expense 36,563 37,416 38,267 33,751 Income before income taxes 20,487 19,893 14,911 17,232 Income tax expense 7,954 7,694 5,506 6,558 Net income $ 12,533 $ 12,199 $ 9,405 $ 10,674 Per common share: Net income (diluted) $ 0.54 $ 0.53 $ 0.41 $ 0.46 Dividends $ 0.15 $ 0.15 $ 0.15 $ 0.15

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2017
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. The Bank operates from 58 traditional branches and 10 in-store The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,703,000 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.
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.
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, 2017 and throughout 2016, 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
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 original 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 specific reserve allocation within the allowance for loan losses. 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 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 re-graded Re-grading 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. 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 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality 310-30, 310-30 310-30 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, 310-20, 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 shorter of the estimated useful lives of the related assets or lease terms. Asset lives range from 3-10 15-40
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
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.
Low Income Housing Tax Credits	Low Income Housing Tax Credits The Company accounts for low income housing tax credits and the related qualified affordable housing projects using the proportional amortization method. Under the proportional amortization method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). Upon entering into a qualified affordable housing project, the Company records, in other liabilities, the entire amount that it has agreed to invest in the project, and an equal amount, in other assets, representing its investment in the project. As the Company disburses cash to satisfy its investment obligation, other liabilities are reduced. Over time, as the tax credits and other tax benefits of the project are realized by the Company, the investment recorded in other assets is reduced using the proportional amortization method.
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 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.
Recent Accounting Pronouncements	Recent Accounting Pronouncements FASB issued Accounting Standard Update (ASU) No. 2016-02 , Leases (Topic 842) ASU 2016-2, on-balance ASU 2016-02 2016-02 FASB issued Accounting Standard Update (ASU) No. 2016-09 , Compensation – Stock Compensation (Topic 718). ASU 2016-09, ASU 2016-09 FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326) 2016-13 2016-13, 2016-13 available-for-sale 2016-13 2016-13 2016-13 FASB issued ASU No. 2016-18, Statement of Cash Flows - Restricted Cash (Topic 230). ASU 2016-18 beginning-of-period end-of-period ASU 2016-18 FASB issued ASU No. 2017-01, Business Combinations - Clarifying the Definition of a Business (Topic 805). ASU 2017-01 ASU 2017-01 ASU 2017-01 FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): 2017-04 ASU 2017-04

Business Combinations (Tables)

Business Combinations (Tables) - Bank of America [Member]	3 Months Ended
	Mar. 31, 2017
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, 2017
Investments Schedule [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, 2017 Amortized Gross Gross Estimated (in thousands) Securities Available for Sale Obligations of U.S. government corporations and agencies $ 455,093 $ 1,846 $ (6,323 ) $ 450,616 Obligations of states and political subdivisions 121,709 321 (3,865 ) 118,165 Marketable equity securities 3,000 — (62 ) 2,938 Total securities available for sale $ 579,802 $ 2,167 $ (10,250 ) $ 571,719 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 565,578 $ 5,652 $ (3,906 ) $ 567,324 Obligations of states and political subdivisions 14,559 101 (168 ) 14,492 Total securities held to maturity $ 580,137 $ 5,753 $ (4,074 ) $ 581,816 December 31, 2016 Amortized Gross Gross Estimated (in thousands) Securities Available for Sale Obligations of U.S. government corporations and agencies $ 434,357 $ 1,949 $ (6,628 ) $ 429,678 Obligations of states and political subdivisions 121,746 267 (4,396 ) 117,617 Marketable equity securities 3,000 — (62 ) 2,938 Total securities available for sale $ 559,103 $ 2,216 $ (11,086 ) $ 550,233 Securities Held to Maturity Obligations of U.S. government corporations and agencies $ 587,982 $ 5,001 $ (4,199 ) $ 588,784 Obligations of states and political subdivisions 14,554 56 (191 ) 14,419 Total securities held to maturity $ 602,536 $ 5,057 $ (4,390 ) $ 603,203
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 Due in one year $ 5 $ 5 — — Due after one year through five years 8,290 8,519 $ 1,184 $ 1,213 Due after five years through ten years 13,806 14,344 4,539 4,574 Due after ten years 557,701 548,851 574,414 576,029 Totals $ 579,802 $ 571,719 $ 580,137 $ 581,816
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 (in thousands) March 31, 2017 Securities Available for Sale: Obligations of U.S. government corporations and agencies $ 359,657 $ (6,323 ) — — $ 359,657 $ (6,323 ) Obligations of states and political subdivisions 83,818 (3,865 ) — — 83,818 (3,865 ) Marketable equity securities 2,938 (62 ) — — 2,938 (62 ) Total securities available-for-sale $ 446,413 $ (10,250 ) — — $ 446,413 $ (10,250 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 226,101 $ (3,906 ) — — $ 226,101 $ (3,906 ) Obligations of states and political subdivisions 7,867 (168 ) — — 7,867 (168 ) Total securities held-to-maturity $ 233,968 $ (4,074 ) — — $ 233,968 $ (4,074 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) December 31, 2016 Securities Available for Sale: Obligations of U.S. government corporations and agencies $ 370,389 $ (6,628 ) — — $ 370,389 $ (6,628 ) Obligations of states and political subdivisions 90,825 (4,396 ) — — 90,825 (4,396 ) Marketable equity securities 2,938 (62 ) — — 2,938 (62 ) Total securities available-for-sale $ 464,152 $ (11,086 ) — — $ 464,152 $ (11,086 ) Securities Held to Maturity: Obligations of U.S. government corporations and agencies $ 280,497 $ (4,199 ) — — $ 280,497 $ (4,199 ) Obligations of states and political subdivisions 9,984 (191 ) — — 9,984 (191 ) Total securities held-to-maturity $ 290,481 $ (4,390 ) — — $ 290,481 $ (4,390 )

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Summary of Loan Balances	A summary of loan balances follows (in thousands): March 31, 2017 Originated PNCI PCI - PCI - Total Mortgage loans on real estate: Residential 1-4 $ 237,336 $ 71,006 — $ 1,359 $ 309,701 Commercial 1,509,374 239,390 — 12,350 1,761,114 Total mortgage loan on real estate 1,746,710 310,396 — 13,709 2,070,815 Consumer: Home equity lines of credit 259,969 19,622 $ 2,753 1,252 283,596 Home equity loans 35,725 3,383 — 1,133 40,241 Other 26,777 2,470 — 66 29,313 Total consumer loans 322,471 25,475 2,753 2,451 353,150 Commercial 198,554 10,350 — 3,781 212,685 Construction: Residential 58,718 137 — 844 59,699 Commercial 55,872 8,971 — — 64,843 Total construction 114,590 9,108 — 844 124,542 Total loans, net of deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Total principal balance of loans owed, net of charge-offs $ 2,389,038 $ 364,451 $ 7,848 $ 23,981 $ 2,785,318 Unamortized net deferred loan fees (6,713 ) — — — (6,713 ) Discounts to principal balance of loans owed, net of charge-offs — (9,122 ) (5,095 ) (3,196 ) (17,413 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Noncovered loans $ 2,382,325 $ 355,329 $ 2,753 $ 17,804 $ 2,758,211 Covered loans — — — 2,981 2,981 Total loans, net of unamortized deferred loan fees and discounts $ 2,382,325 $ 355,329 $ 2,753 $ 20,785 $ 2,761,192 Allowance for loan losses $ (27,180 ) $ (1,406 ) $ (8 ) $ (2,423 ) $ (31,017 ) A summary of loan balances follows (in thousands): December 31, 2016 Originated PNCI PCI - PCI - Total Mortgage loans on real estate: Residential 1-4 $ 229,609 $ 78,935 — $ 1,363 $ 309,907 Commercial 1,484,420 250,037 — 13,460 1,747,917 Total mortgage loan on real estate 1,714,029 328,972 — 14,823 2,057,824 Consumer: Home equity lines of credit 263,590 21,765 $ 2,983 1,377 289,715 Home equity loans 37,074 3,618 — 1,130 41,822 Other 28,167 2,534 — 65 30,766 Total consumer loans 328,831 27,917 2,983 2,572 362,303 Commercial 200,735 12,321 — 3,991 217,047 Construction: Residential 54,613 141 — 675 55,429 Commercial 58,119 8,871 — — 66,990 Total construction 112,732 9,012 — 675 122,419 Total loans, net of deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Total principal balance of loans owed, net of charge-offs $ 2,363,243 $ 388,139 $ 8,280 $ 25,650 $ 2,785,312 Unamortized net deferred loan fees (6,916 ) — — — (6,916 ) Discounts to principal balance of loans owed, net of charge-offs — (9,917 ) (5,297 ) (3,589 ) (18,803 ) Total loans, net of unamortized deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Noncovered loans $ 2,356,327 $ 378,222 $ 2,983 $ 18,885 $ 2,756,417 Covered loans — — — 3,176 3,176 Total loans, net of unamortized deferred loan fees and discounts $ 2,356,327 $ 378,222 $ 2,983 $ 22,061 $ 2,759,593 Allowance for loan losses $ (28,141 ) $ (1,665 ) $ (17 ) $ (2,680 ) $ (32,503 )
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, 2017 2016 Change in accretable yield: Balance at beginning of period $ 10,348 $ 13,255 Accretion to interest income (902 ) (1,091 ) Reclassification from (to) nonaccretable difference 114 (184 ) Balance at end of period $ 9,560 $ 11,980

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Beginning balance $ 2,387 $ 11,905 $ 7,044 $ 2,617 — $ 622 $ 5,831 $ 1,417 $ 680 $ 32,503 Charge-offs — — (71 ) (31 ) — (174 ) (133 ) — — (409 ) Recoveries — 110 46 12 — 141 170 — 1 480 (Benefit) provision (105 ) (62 ) (489 ) (178 ) — 6 (542 ) (78 ) (109 ) (1,557 ) Ending balance $ 2,282 $ 11,953 $ 6,530 $ 2,420 — $ 595 $ 5,326 $ 1,339 $ 572 $ 31,017 Ending balance: Individ. evaluated for impairment $ 249 $ 124 $ 400 $ 57 — $ 31 $ 811 $ 14 — $ 1,686 Loans pooled for evaluation $ 1,808 $ 10,382 $ 6,122 $ 2,297 — $ 564 $ 3,873 $ 1,282 $ 572 $ 26,900 Loans acquired with deteriorated credit quality $ 225 $ 1,447 $ 8 $ 66 — — $ 642 $ 43 — $ 2,431 Loans, net of unearned fees – As of March 31, 2017 RE Mortgage Home Equity Auto Other Construction (in thousands) Resid. Comm. Lines Loans Indirect Consum. C&I Resid. Comm. Total Ending balance: Total loans $ 309,701 $ 1,761,114 $ 283,596 $ 40,241 — $ 29,313 $ 212,685 $ 59,699 $ 64,843 $ 2,761,192 Individ. evaluated for impairment $ 3,849 $ 16,979 $ 2,204 $ 1,241 — $ 280 $ 3,072 $ 25 — $ 27,650 Loans pooled for evaluation $ 304,493 $ 1,731,785 $ 277,388 $ 37,867 — $ 28,967 $ 205,832 $ 58,830 $ 64,843 $ 2,710,005 Loans acquired with Deteriorated credit quality $ 1,359 $ 12,350 $ 4,004 $ 1,133 — $ 66 $ 3,781 $ 844 — $ 23,537 Allowance for Loan Losses - Year Ended December 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 (321 ) (827 ) (585 ) (219 ) — (823 ) (455 ) — — (3,230 ) Recoveries 880 920 2,317 590 — 449 404 54 78 5,692 (Benefit) provision (679 ) 369 (5,941 ) (892 ) — 308 611 464 (210 ) (5,970 ) Ending balance $ 2,387 $ 11,905 $ 7,044 $ 2,617 — $ 622 $ 5,831 $ 1,417 $ 680 $ 32,503 Ending balance: Individ. evaluated for impairment $ 249 $ 127 $ 410 $ 102 — $ 28 $ 1,130 — — $ 2,046 Loans pooled for evaluation $ 1,952 $ 10,329 $ 6,618 $ 2,451 — $ 594 $ 3,765 $ 1,371 $ 680 $ 27,760 Loans acquired with deteriorated credit quality $ 186 $ 1,449 $ 17 $ 64 — — $ 936 $ 45 — $ 2,697 Loans, net of unearned fees – As of December 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 $ 309,907 $ 1,747,917 $ 289,715 $ 41,822 — $ 30,766 $ 217,047 $ 55,429 $ 66,990 $ 2,759,593 Individ. evaluated for impairment $ 3,785 $ 15,748 $ 3,196 $ 1,150 — $ 154 $ 4,096 $ 11 — $ 28,140 Loans pooled for evaluation $ 304,759 $ 1,718,709 $ 282,159 $ 39,542 — $ 30,547 $ 208,960 $ 54,743 $ 66,990 $ 2,706,409 Loans acquired with deteriorated credit quality $ 1,363 $ 13,460 $ 4,360 $ 1,130 — $ 65 $ 3,991 $ 675 — $ 25,044 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
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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loans: Pass $ 233,189 $ 1,476,126 $ 255,326 $ 32,480 — $ 26,181 $ 187,333 $ 58,707 $ 48,636 $ 2,317,978 Special mention 2,031 21,022 2,401 1,352 — 389 5,222 — 7,236 39,653 Substandard 2,116 12,226 2,242 1,893 — 207 5,999 11 — 24,694 Loss — — — — — — — — — — Total originated $ 237,336 $ 1,509,374 $ 259,969 $ 35,725 — $ 26,777 $ 198,554 $ 58,718 $ 55,872 $ 2,382,325 PNCI loans: Pass $ 68,062 $ 227,038 $ 18,231 $ 3,180 — $ 2,409 $ 10,349 $ 137 $ 8,971 $ 338,377 Special mention 1,723 5,973 688 90 — 58 1 — — 8,533 Substandard 1,221 6,379 703 113 — 3 — — — 8,419 Loss — — — — — — — — — — Total PNCI $ 71,006 $ 239,390 $ 19,622 $ 3,383 — $ 2,470 $ 10,350 $ 137 $ 8,971 $ 355,329 PCI loans $ 1,359 $ 12,350 $ 4,005 $ 1,133 — $ 66 $ 3,781 $ 844 — $ 23,538 Total loans $ 309,701 $ 1,761,114 $ 283,596 $ 40,241 — $ 29,313 $ 212,685 $ 59,699 $ 64,843 $ 2,761,192 Credit Quality Indicators – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loans: Pass $ 224,988 $ 1,457,128 $ 258,024 $ 34,299 — $ 27,542 $ 190,902 $ 54,602 $ 57,808 $ 2,305,293 Special mention 2,225 15,108 2,518 891 — 385 6,133 — 311 27,571 Substandard 2,396 12,184 3,048 1,884 — 240 3,700 11 — 23,463 Loss — — — — — — — — — — Total originated $ 229,609 $ 1,484,420 $ 263,590 $ 37,074 — $ 28,167 $ 200,735 $ 54,613 $ 58,119 $ 2,356,327 PNCI loans: Pass $ 75,600 $ 236,740 $ 20,442 $ 3,492 — $ 2,437 $ 12,320 $ 141 $ 8,871 $ 360,043 Special mention 1,849 6,057 509 41 — 92 1 — — 8,549 Substandard 1,486 7,240 814 85 — 5 — — — 9,630 Loss — — — — — — — — — — Total PNCI $ 78,935 $ 250,037 $ 21,765 $ 3,618 — $ 2,534 $ 12,321 $ 141 $ 8,871 $ 378,222 PCI loans $ 1,363 $ 13,460 $ 4,360 $ 1,130 — $ 65 $ 3,991 $ 675 — $ 25,044 Total loans $ 309,907 $ 1,747,917 $ 289,715 $ 41,822 — $ 30,766 $ 217,047 $ 55,429 $ 66,990 $ 2,759,593
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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loan balance: Past due: 30-59 $ 845 $ 1,855 $ 424 $ 640 — $ 119 $ 1,727 — $ 421 $ 6,031 60-89 — 74 461 176 — 9 1,527 — — 2,247 > 90 Days — 1,835 104 319 — 5 570 $ 11 — 2,844 Total past due 845 3,764 989 1,135 — 133 3,824 11 421 11,122 Current 236,491 1,505,610 258,981 34,590 — 26,644 194,730 58,707 55,451 2,371,204 Total orig. loans $ 237,336 $ 1,509,374 $ 259,970 $ 35,725 — $ 26,777 $ 198,554 $ 58,718 $ 55,872 $ 2,382,326 > 90 Days and still accruing — $ 1,712 — — — — $ 125 — — $ 1,837 Nonaccrual loans $ 473 $ 7,485 $ 798 $ 822 — $ 12 $ 1,769 $ 25 — $ 11,384 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. PNCI loan balance: Past due: 30-59 $ 367 $ 669 $ 270 — — $ 3 — — — $ 1,309 60-89 — — — — — — — — — — > 90 Days 63 81 — — — — — — — 144 Total past due 430 750 270 — — 3 — — — 1,453 Current 70,576 238,640 19,352 $ 3,383 — 2,467 $ 10,350 $ 137 $ 8,971 353,876 Total PNCI loans $ 71,006 $ 239,390 $ 19,622 $ 3,383 — $ 2,470 $ 10,350 $ 137 $ 8,971 $ 355,329 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 164 $ 1,760 $ 151 $ 58 — $ 2 — — — $ 2,135 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. Originated loan balance: Past due: 30-59 $ 552 $ 317 $ 754 $ 646 — $ 16 $ 1,148 $ 921 — $ 4,354 60-89 139 1,517 — 395 — 30 84 — $ 421 2,586 > 90 Days — 216 687 184 — 15 634 11 — 1,747 Total past due $ 691 $ 2,050 $ 1,441 $ 1,225 — $ 61 $ 1,866 $ 932 $ 421 $ 8,687 Current 228,918 1,482,370 262,149 35,849 — 28,106 198,869 53,681 57,698 2,347,640 Total orig. loans $ 229,609 $ 1,484,420 $ 263,590 $ 37,074 — $ 28,167 $ 200,735 $ 54,613 $ 58,119 $ 2,356,327 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 255 $ 7,736 $ 1,211 $ 718 — $ 33 $ 2,930 $ 11 — $ 12,894 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. PNCI loan balance: Past due: 30-59 $ 1,510 $ 73 $ 274 $ 39 — — — — — $ 1,896 60-89 — — — — — — — — — — > 90 Days 21 81 589 13 — — — — — 704 Total past due $ 1,531 $ 154 $ 863 $ 52 — — — — — $ 2,600 Current 77,404 249,883 20,902 3,566 — $ 2,534 $ 12,321 $ 141 $ 8,871 375,622 Total PNCI loans $ 78,935 $ 250,037 $ 21,765 $ 3,618 — $ 2,534 $ 12,321 $ 141 $ 8,871 $ 378,222 > 90 Days and still accruing — — — — — — — — — — Nonaccrual loans $ 194 $ 1,826 $ 742 $ 67 — $ 5 — — — $ 2,834
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 original 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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 1,782 $ 14,431 $ 1,064 $ 743 — $ 5 $ 1,289 $ 11 — $ 19,325 Unpaid principal $ 1,793 $ 14,881 $ 1,144 $ 1,085 — $ 6 $ 1,312 $ 16 — $ 20,237 Average recorded Investment $ 2,834 $ 20,770 $ 2,013 $ 845 $ 1 $ 11 $ 932 $ 7 — $ 27,413 Interest income Recognized $ 20 $ 98 $ 6 $ 1 — — $ 7 — — $ 132 With an allowance recorded: Recorded investment $ 1,378 $ 640 $ 427 $ 440 — $ 21 $ 1,783 $ 14 — $ 4,703 Unpaid principal $ 1,382 $ 640 $ 440 $ 443 — $ 22 $ 1,842 $ 14 — $ 4,783 Related allowance $ 172 $ 18 $ 106 $ 57 — $ 14 $ 811 $ 14 — $ 1,192 Average recorded Investment $ 1,692 $ 1,029 $ 1,076 $ 557 — $ 11 $ 1,938 $ 7 — $ 6,310 Interest income Recognized $ 11 $ 9 $ 1 $ 5 — — $ 14 — — $ 40 Impaired PNCI Loans – As of, or for the Three Months Ended, March 31, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 433 $ 1,777 $ 220 $ 58 — $ 138 — — — $ 2,626 Unpaid principal $ 455 $ 2,011 $ 233 $ 67 — $ 139 — — — $ 2,905 Average recorded Investment $ 654 $ 1,455 $ 337 $ 64 — $ 86 $ 1 — $ 245 $ 2,842 Interest income Recognized $ 2 — $ 1 — — $ 2 — — — $ 5 With an allowance recorded: Recorded investment $ 256 $ 131 $ 493 — — $ 116 — — — $ 996 Unpaid principal $ 256 $ 131 $ 493 — — $ 116 — — — $ 996 Related allowance $ 77 $ 106 $ 295 — — $ 16 — — — $ 494 Average recorded Investment $ 128 $ 1,440 $ 550 $ 19 — $ 175 — — — $ 2,312 Interest income Recognized $ 2 $ 2 $ 5 — — $ 1 — — — $ 10 Impaired Originated Loans – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 1,691 $ 13,144 $ 1,480 $ 598 — $ 15 $ 762 $ 11 — $ 17,701 Unpaid principal $ 1,699 $ 13,488 $ 1,561 $ 922 — $ 29 $ 926 $ 16 — $ 18,641 Average recorded Investment $ 2,788 $ 20,126 $ 2,221 $ 773 $ 1 $ 16 $ 669 $ 7 — $ 26,601 Interest income Recognized $ 83 $ 581 $ 40 $ 4 — $ 1 $ 48 — — $ 757 With an allowance recorded: Recorded investment $ 1,372 $ 646 $ 430 $ 485 — $ 18 $ 3,334 — — $ 6,285 Unpaid principal $ 1,372 $ 646 $ 440 $ 487 — $ 19 $ 3,385 — — $ 6,349 Related allowance $ 170 $ 19 $ 110 $ 102 — $ 13 $ 1,130 — — $ 1,544 Average recorded Investment $ 1,689 $ 1,032 $ 1,077 $ 579 — $ 9 $ 2,714 — — $ 7,100 Interest income Recognized $ 56 $ 37 $ 9 $ 25 — $ 2 $ 77 — — $ 206 Impaired PNCI Loans – As of December 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. With no related allowance recorded: Recorded investment $ 463 $ 1,826 $ 735 $ 67 — $ 3 — — — $ 3,094 Unpaid principal $ 486 $ 2,031 $ 746 $ 74 — $ 4 — — — $ 3,341 Average recorded Investment $ 669 $ 1,479 $ 594 $ 69 — $ 18 $ 1 — $ 245 $ 3,075 Interest income Recognized $ 7 — $ 9 $ 1 — — — — — $ 17 With an allowance recorded: Recorded investment $ 259 $ 132 $ 551 — — $ 118 — — — $ 1,060 Unpaid principal $ 259 $ 132 $ 551 — — $ 118 — — — $ 1,060 Related allowance $ 79 $ 108 $ 300 — — $ 15 — — — $ 502 Average recorded Investment $ 130 $ 1,440 $ 579 $ 19 — $ 176 — — — $ 2,344 Interest income Recognized $ 10 $ 7 $ 27 — — $ 5 — — — $ 49 Impaired Originated Loans – As of, or for the Three Months Ended, March 31, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. 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 C&I Construction Total (in thousands) Resid. Comm. Lines Loans Resid. Comm. 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
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, 2017 RE Mortgage Home Equity Auto Other C&I Construction Total (dollars in thousands) Resid. Comm. Lines Loans Resid. Comm. Number — — 1 — — 1 1 — — 3 Pre-mod — — $ 20 — — $ 14 $ 100 — — $ 134 Post-mod — — $ 20 — — $ 14 $ 100 — — $ 134 Financial impact due to TDR taken as additional provision — — — — — $ 11 $ 94 — — $ 105 Number that defaulted during the period — 1 — — — — — — — 1 Recorded investment of TDRs that defaulted during the period — $ 124 — — — — — — — $ 124 Financial impact due to 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, 2016 RE Mortgage Home Equity Auto Other C&I Construction Total (dollars in thousands) Resid. Comm. Lines Loans Resid. Comm. Number — 2 1 1 — — 1 — — 5 Pre-mod — $ 78 $ 132 $ 105 — — $ 12 — — $ 327 Post-mod — $ 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 — — — — — — — — — — Financial impact due to the default of previous TDR taken as charge-offs or additional provisions — — — — — — — — — —

Foreclosed Assets (Tables)

Foreclosed Assets (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 Three months ended March 31, 2016 Noncovered Covered Total Noncovered Covered Total Beginning balance, net $ 3,763 $ 223 $ 3,986 $ 5,369 — $ 5,369 Additions/transfers from loans 85 — 85 416 — 416 Dispositions/sales (385 ) (223 ) (608 ) (1,325 ) — (1,325 ) Valuation adjustments 66 — 66 11 — 11 Ending balance, net $ 3,529 — $ 3,529 $ 4,471 — $ 4,471 Ending valuation allowance $ (300 ) — $ (300 ) $ 572 — $ 572 Ending number of foreclosed assets 12 — 12 21 21 Proceeds from sale of foreclosed assets $ 510 $ 216 $ 726 $ 1,417 — $ 1,417 Gain on sale of foreclosed assets $ 125 $ (7 ) $ 118 $ 92 — $ 92

Premises and Equipment (Tables)

Premises and Equipment (Tables)	3 Months Ended
	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Premises and equipment were comprised of: March 31, December 31, 2017 2016 (In thousands) Land & land improvements $ 9,522 $ 9,522 Buildings 43,600 42,345 Furniture and equipment 33,077 31,428 86,199 83,295 Less: Accumulated depreciation (38,719 ) (37,412 ) 47,480 45,883 Construction in progress 2,028 2,523 Total premises and equipment $ 49,508 $ 48,406

Cash Value of Life Insurance (T

Cash Value of Life Insurance (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Beginning balance $ 95,912 $ 94,560 Increase in cash value of life insurance 685 696 Gain on death benefit 107 Insurance proceeds receivable reclassified to other assets (921 ) — Ending balance $ 95,783 $ 95,256 End of period death benefit $ 164,574 $ 166,216 Number of policies owned 183 187 Insurance companies used 14 14 Current and former employees and directors covered 58 59

Goodwill and Other Intangible47

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill Intangible	The following table summarizes the Company’s goodwill intangible as of the dates indicated: March 31, December 31, (dollar in thousands) 2017 Additions Reductions 2016 Goodwill $ 64,311 — — $ 64,311
Summary of Core Deposit Intangibles	The following table summarizes the Company’s core deposit intangibles as of the dates indicated: March 31, Reductions/ Fully December 31, (dollar in thousands) 2017 Additions Amortization Depreciated 2016 Core deposit intangibles $ 10,120 — — — $ 10,120 Accumulated amortization (3,916 ) — $ (359 ) — (3,557 ) Core deposit intangibles, net $ 6,204 — $ (359 ) — $ 6,563
Remaining Estimated Core Deposit Intangible Amortization	The following table summarizes the Company’s remaining estimated core deposit intangible amortization (dollars in thousands): Estimated Core Deposit Years Ended Intangible Amortization 2017 $ 1,030 2018 1,324 2019 1,228 2020 1,228 2021 969 Thereafter 425

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Fair Value of Mortgage Servicing Rights	The following tables summarize the activity in, and the main assumptions used to determine the fair value of mortgage servicing rights (“MSRs”) for the periods indicated (dollars in thousands): Three months ended March 31, 2017 2016 Balance at beginning of period $ 6,595 $ 7,618 Additions 278 220 Change in fair value (13 ) (698 ) Balance at end of period $ 6,860 $ 7,140 Contractually specified servicing fees, late fees and ancillary fees earned $ 521 $ 517 Balance of loans serviced at: Beginning of period $ 816,623 $ 817,917 End of period $ 822,506 $ 813,800 Weighted-average prepayment speed (CPR) 8.3 % 11.6 % Weighted-average discount rate 14.0 % 10.0 %

Indemnification Asset (Tables)

Indemnification Asset (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Beginning balance $ (744 ) $ (521 ) Effect of actual and estimated future covered losses and recoveries (191 ) (111 ) Reimbursable (revenue) expenses incurred (32 ) (4 ) Payments made to (received from) FDIC 72 29 Ending balance $ (895 ) $ (607 ) Amount of indemnification asset (liability) recorded in other assets $ (179 ) $ 11 Amount of indemnification asset (liability) recorded in other liabilities (716 ) (618 ) Ending balance $ (895 ) $ (607 )

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Other Assets	Other assets were comprised of (in thousands): March 31, December 31, 2017 2016 Deferred tax asset, net $ 35,764 $ 36,199 Prepaid expense 4,219 3,045 Software 1,805 2,039 Advanced compensation 220 249 Capital Trusts 1,733 1,702 Investment in Low Housing Tax Credit Funds 18,184 18,465 Life insurance proceeds receivable 2,759 2,120 Tax refund receivable — 6,460 Premises held for sale — 2,896 Miscellaneous other assets 1,970 1,568 Total other assets $ 66,654 $ 74,743

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2017
Banking and Thrift [Abstract]
Summary of Balances of Deposits	A summary of the balances of deposits follows (in thousands): March 31 December 31, 2017 2016 Noninterest-bearing demand $ 1,254,431 $ 1,275,745 Interest-bearing demand 947,006 887,625 Savings 1,370,015 1,397,036 Time certificates, over $250,000 76,372 75,184 Other time certificates 251,060 259,970 Total deposits $ 3,898,884 $ 3,895,560

Reserve for Unfunded Commitme52

Reserve for Unfunded Commitments (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Balance at beginning of period $ 2,719 $ 2,475 Provision for losses – Unfunded commitments 15 — Balance at end of period $ 2,734 $ 2,475

Other Liabilities (Tables)

Other Liabilities (Tables)	3 Months Ended
	Mar. 31, 2017
Other Liabilities Disclosure [Abstract]
Components of Other Liabilities	Other liabilities were comprised of (in thousands): March 31, December 31, 2017 2016 Deferred compensation $ 6,683 $ 6,525 Pension liability 26,868 26,645 Joint beneficiary agreements 3,069 3,007 Low income housing tax credit fund commitments 14,380 15,176 Accrued salaries and benefits expense 6,742 5,704 Loan escrow and servicing payable 1,140 2,146 Litigation contingency 1,450 1,450 Taxes payable 546 — Miscellaneous other liabilities 6,060 6,711 Total other liabilities $ 66,938 $ 67,364

Other Borrowings (Tables)

Other Borrowings (Tables)	3 Months Ended
	Mar. 31, 2017
Text Block [Abstract]
Summary of Balances of Other Borrowings	A summary of the balances of other borrowings follows: March 31, December 31, 2017 2016 (in thousands) Other collateralized borrowings, fixed rate, as of March 31, 2017 of 0.05%, payable on April 3, 2017 $ 15,197 $ 17,493 Total other borrowings $ 15,197 $ 17,493

Junior Subordinated Debt (Table

Junior Subordinated Debt (Tables)	3 Months Ended
	Mar. 31, 2017
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): Subordinated Debt Series Maturity Face Coupon Rate As of March 31, 2017 December 31, 2016 Current Recorded Recorded Coupon Rate Book Value Book Value TriCo Cap Trust I 10/7/2033 $ 20,619 3.05 % 4.07 % $ 20,619 $ 20,619 TriCo Cap Trust II 7/23/2034 20,619 2.55 % 3.59 % 20,619 20,619 North Valley Trust II 4/24/2033 6,186 3.25 % 4.29 % 5,105 5,095 North Valley Trust III 4/24/2034 5,155 2.80 % 3.84 % 4,013 4,005 North Valley Trust IV 3/15/2036 10,310 1.33 % 2.46 % 6,357 6,329 $ 62,889 $ 56,713 $ 56,667

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2016, future minimum commitments under non-cancelable Operating Leases (in thousands) 2017 $ 3,320 2018 2,523 2019 1,924 2020 1,325 2021 963 Thereafter 1,696 Future minimum lease payments $ 11,751
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 $ 228,892 $ 220,836 Consumer loans 412,821 406,855 Real estate mortgage loans 38,589 42,184 Real estate construction loans 88,301 97,399 Standby letters of credit 11,639 12,763 Deposit account overdraft privilege 99,029 98,583

Stock Options and Other Equit57

Stock Options and Other Equity-Based Incentive Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Activity	Stock option activity during the three months ended March 31, 2017 is summarized in the following table: Number of Shares Option Price per Share Weighted Average Exercise Price Weighted Average Fair Value on Date of Grant Outstanding at December 31, 2016 592,250 $12.63 to $23.21 $ 17.12 Options granted — — to — — — Options exercised (21,450 ) $14.54 to $22.54 $ 20.30 Options forfeited — — to — — Outstanding at March 31, 2017 570,800 $12.63 to $23.21 $ 17.00
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, 2017: Currently Exercisable Currently Not Exercisable Total Outstanding Number of options 499,200 71,600 570,800 Weighted average exercise price $ 16.77 $ 18.64 $ 17.00 Intrinsic value (in thousands) $ 9,367 $ 1,209 $ 10,576 Weighted average remaining contractual term (yrs.) 3.9 6.0 4.2
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 Number Weighted Outstanding at December 31, 2016 68,450 47,426 RSUs granted 730 $ 36.47 — RSUs added through dividend credits 291 — RSUs released (304 ) — RSUs forfeited/expired — — Outstanding at March 31, 2017 69,167 47,426

Noninterest Income and Expense

Noninterest Income and Expense (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Service charges on deposit accounts $ 3,619 $ 3,365 ATM and interchange fees 4,015 3,393 Other service fees 765 728 Mortgage banking service fees 521 517 Change in value of mortgage servicing rights (13 ) (698 ) Total service charges and fees 8,907 7,305 Gain on sale of loans 910 803 Commissions on sale of non-deposit 607 532 Increase in cash value of life insurance 685 696 Change in indemnification asset (221 ) (115 ) Gain on sale of foreclosed assets 118 92 Sale of customer checks 104 119 Lease brokerage income 206 195 Loss on disposal of fixed assets — (31 ) Life insurance proceeds in excess of cash value 107 — Other 280 194 Total other noninterest income 2,796 2,485 Total noninterest income $ 11,703 $ 9,790
Components of Noninterest Expense	The components of noninterest expense were as follows (in thousands): Three months ended March 31, 2017 2016 Base salaries, net of deferred loan origination costs $ 13,390 $ 12,708 Incentive compensation 2,198 1,739 Benefits and other compensation costs 5,305 4,818 Total salaries and benefits expense 20,893 19,265 Occupancy 2,692 2,308 Equipment 1,723 1,386 Data processing and software 2,396 1,843 ATM and POS network charges 853 1,229 Telecommunications 643 685 Postage 404 463 Courier service 254 271 Advertising 967 895 Assessments 405 632 Operational losses 435 164 Professional fees 766 809 Foreclosed assets expense 38 46 Reversal of foreclosed asset losses (66 ) (11 ) Change in reserve for unfunded commitments 15 — Intangible amortization 359 299 Merger and acquisition expense — 622 Other miscellaneous expense 3,045 2,845 Total other noninterest expense 14,929 14,486 Total noninterest expense $ 35,822 $ 33,751 Merger and acquisition expense: Base salaries (outside temporary help) — $ 187 Data processing and software — — Professional fees — 180 Advertising and marketing — 114 Other miscellaneous expense — 141 Total merger and acquisition expense — $ 622

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 Federal statutory income tax rate 35.0 % 35.0 % State income taxes, net of federal tax benefit 6.9 6.3 Tax-exempt (1.9 ) (1.8 ) Increase in cash value of insurance policies (1.4 ) (1.4 ) Tax credits (0.4 ) — Equity compensation (0.5 ) — Other 0.1 — Effective Tax Rate 37.8 % 38.1 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Earnings per share have been computed based on the following: Three months ended March 31, (In thousands) 2017 2016 Net income $ 12,079 $ 10,674 Average number of common shares outstanding 22,870 22,783 Effect of dilutive stock options and restricted stock 362 263 Average number of common shares outstanding used to calculate diluted earnings per share 23,232 23,046 Options excluded from diluted earnings per share because the effect of these options was antidilutive — 23

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 (in thousands) Unrealized holding gains (losses) on available for sale securities before reclassifications $ 787 $ 6,125 Amounts reclassified out of accumulated other comprehensive income- — — Unrealized holding gains (losses) on available for sale securities after reclassifications 787 6,125 Tax effect (330 ) (2,575 ) Unrealized holding gains (losses) on available for sale securities, net of tax 457 3,550 Change in unfunded status of the supplemental retirement plans before reclassifications — — Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost (3 ) — Amortization of actuarial losses 96 — Total amounts reclassified out of accumulated other comprehensive income 93 — Change in unfunded status of the supplemental retirement plans after reclassifications — Tax effect (39 ) — Change in unfunded status of the supplemental retirement plans, net of tax 54 — 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) $ 511 $ 3,550
Components of Accumulated Other Comprehensive Income	The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: March 31, December 31, 2017 2016 (in thousands) Net unrealized loss on available for sale securities $ (8,083 ) $ (8,870 ) Tax effect 3,399 3,729 Unrealized holding loss on available for sale securities, net of tax (4,684 ) (5,141 ) Unfunded status of the supplemental retirement plans (4,621 ) (4,714 ) Tax effect 1,943 1,982 Unfunded status of the supplemental retirement plans, net of tax (2,678 ) (2,732 ) Joint beneficiary agreement liability (40 ) (40 ) Tax effect — — Joint beneficiary agreement liability, net of tax (40 ) (40 ) Accumulated other comprehensive loss $ (7,402 ) $ (7,913 )

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 2016 (In thousands) Net pension cost included the following components: Service cost-benefits earned during the period $ 235 $ 260 Interest cost on projected benefit obligation 249 256 Amortization of net obligation at transition 1 — Amortization of prior service cost (3 ) (10 ) Recognized net actuarial loss 96 138 Net periodic pension cost $ 578 $ 644

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2015 $ 4,201 Advances/new loans 730 Removed/payments (2,499 ) Balance December 31, 2016 2,432 Advances/new loans 160 Removed/payments (19 ) Balance March 31, 2017 $ 2,573

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2017
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, 2017 Total Level 1 Level 2 Level 3 Securities available for sale: Obligations of U.S. government corporations and agencies $ 450,616 — $ 450,616 — Obligations of states and political subdivisions 118,165 — 118,165 — Corporate debt securities — — — — Marketable equity services 2,938 $ 2,938 — — Mortgage servicing rights 6,860 — — $ 6,860 Total assets measured at fair value $ 578,579 $ 2,938 $ 568,781 $ 6,860 Fair value at December 31, 2016 Total Level 1 Level 2 Level 3 Securities available-for-sale: Obligations of U.S. government corporations and agencies $ 429,678 — $ 429,678 — Obligations of states and political subdivisions 117,617 — 117,617 — Marketable equity securities 2,938 $ 2,938 — — Mortgage servicing rights 6,595 — — $ 6,595 Total assets measured at fair value $ 556,828 $ 2,938 $ 547,295 $ 6,595
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): Three months ended March 31, Beginning Transfers Change Issuances Ending 2017: Mortgage servicing rights $ 6,595 — $ (13 ) $ 278 $ 6,860 2016: Mortgage servicing rights $ 7,618 — $ (698 ) $ 220 $ 7,140
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, 2017: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,860 Discounted cash flow Constant prepayment rate 6.2%-18.8%, 8.3% Discount rate 14.0%-16.0%, 14.0% The following table presents quantitative information about recurring Level 3 fair value measurements at December 31, 2016: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,595 Discounted cash flow Constant prepayment rate 6.9%-16.6%, 8.8% Discount rate 14.0%-16.0%, 14.0%
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): Three months ended March 31, 2017 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Impaired Originated & PNCI loans $ 824 — — $ 824 $ 30 Foreclosed assets 1,528 — — 1,528 (22 ) Total assets measured at fair value $ 2,352 — — $ 2,352 $ 8 Year ended December 31, 2016 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 1,107 — — $ 1,107 $ (409 ) Foreclosed assets 2,253 2,253 (86 ) Total assets measured at fair value $ 3,360 — — $ 3,360 $ (495 ) Three months ended March 31, 2016 Total Level 1 Level 2 Level 3 Total Gains 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 )
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, 2017: Fair Value Valuation Unobservable Inputs Range, Weighted Average Impaired Originated & PNCI loans $ 824 Sales comparison Adjustment for differences between comparable sales (20.7)%-46.3%, 1.9% Income approach Capitalization rate N/A Foreclosed assets — Sales comparison Adjustment for differences between comparable sales N/A Foreclosed assets (residential $ 657 Sales comparison Adjustment for differences between comparable sales (22.6)%-14.3%, 0.1% Foreclosed assets $ xxx Sales comparison Adjustment for differences between comparable sales (65.0)%-62.5%, (6.9)% 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, 2016: Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 1,107 Sales comparison Income approach Adjustment for differences between comparable sales Capitalization rate Not meaningful N/A Foreclosed assets $ 15 Sales comparison Adjustment for differences between comparable sales Not meaningful Foreclosed assets (residential $ 1,564 Sales comparison Adjustment for differences between comparable sales Not meaningful Foreclosed assets $ 674 Sales comparison Adjustment for differences between comparable sales Not meaningful
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, 2017 December 31, 2016 Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 113,569 $ 113,569 $ 92,197 $ 92,197 Cash at Federal Reserve and other banks 210,137 210,137 213,415 213,415 Level 2 inputs: Securities held to maturity 580,137 581,816 602,536 603,203 Restricted equity securities 16,956 N/A 16,956 N/A Loans held for sale 1,176 1,176 2,998 2,998 Level 3 inputs: Loans, net 2,730,175 2,758,388 2,727,090 2,763,473 Financial liabilities: Level 2 inputs: Deposits 3,898,884 3,897,029 3,895,560 3,893,941 Other borrowings 15,197 15,197 17,493 17,493 Level 3 inputs: Junior subordinated debt $ 56,713 $ 51,177 $ 56,667 $ 49,033 Contract Fair Contract Fair Off-balance Level 3 inputs: Commitments $ 768,603 $ 7,686 $ 767,274 $ 7,673 Standby letters of credit $ 11,639 $ 116 $ 12,763 $ 128 Overdraft privilege commitments $ 99,029 $ 990 $ 98,583 $ 986

TriCo Bancshares Condensed Fi65

TriCo Bancshares Condensed Financial Statements (Parent Only) (Tables)	3 Months Ended
	Mar. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets March 31, December 31, (In thousands) Assets Cash and Cash equivalents $ 2,840 $ 2,802 Investment in Tri Counties Bank 539,273 529,907 Other assets 1,738 1,711 Total assets $ 543,851 $ 534,420 Liabilities and shareholders’ equity Other liabilities $ 420 $ 406 Junior subordinated debt 56,713 56,667 Total liabilities 57,133 57,073 Shareholders’ equity: Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,873,305 and 22,867,802 shares, respectively 253,456 252,820 Retained earnings 240,664 232,440 Accumulated other comprehensive loss, net (7,402 ) (7,913 ) Total shareholders’ equity 486,718 477,347 Total liabilities and shareholders’ equity $ 543,851 $ 534,420
Condensed Statements of Income	Condensed Statements of Income Three months ended March 31, 2017 2016 (In thousands) Interest expense $ 595 $ 535 Administration expense 159 149 Loss before equity in net income of Tri Counties Bank (754 ) (684 ) Equity in net income of Tri Counties Bank: Distributed 4,042 3,680 Under distributed 8,474 7,390 Income tax benefit 317 288 Net income $ 12,079 $ 10,674
Condensed Statements of Comprehensive Income	Condensed Statements of Comprehensive Income Three months ended March 31, 2017 2016 (In thousands) Net income $ 12,079 $ 10,674 Other comprehensive loss, net of tax: Increase (decrease) in unrealized gains on available for sale securities arising during the period 457 3,550 Change in minimum pension liability 54 — Other comprehensive loss 511 3,550 Comprehensive income $ 12,590 $ 14,224
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows Three months ended March 31, 2017 2016 (In thousands) Operating activities: Net income $ 12,079 $ 10,674 Adjustments to reconcile net income to net cash provided by operating activities: Under distributed equity in earnings of Tri Counties Bank (8,474 ) (7,390 ) Equity compensation vesting expense 381 331 Stock option excess tax benefits — (10 ) Net change in other assets and liabilities (348 ) (249 ) Net cash provided by operating activities 3,638 3,356 Investing activities: None Financing activities: Stock option excess tax benefits — 10 Issuance of common stock through option exercise — 173 Repurchase of common stock (169 ) — Cash dividends paid — common (3,431 ) (3,418 ) Net cash used for financing activities (3,600 ) (3,235 ) Net change in cash and cash equivalents 38 121 Cash and cash equivalents at beginning of year 2,802 2,565 Cash and cash equivalents at end of year $ 2,840 $ 2,686

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2017
Banking and Thrift [Abstract]
Actual and Required Capital Ratios of Bank	The following tables present actual and required capital ratios as of March 31, 2017 and December 31, 2016 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, 2017 (1.25%) and December 31, 2016 (0.625%) based on the then phased-in phased-in. Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of March 31, 2017: Total Capital (to Risk Weighted Assets): Consolidated $ 509,690 14.86 % $ 317,437 9.25 % $ 360,237 10.50 % N/A N/A Tri Counties Bank $ 507,235 14.79 % $ 317,276 9.25 % $ 360,054 10.50 % $ 342,909 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 475,939 13.87 % $ 248,802 7.25 % $ 291,620 8.50 % N/A N/A Tri Counties Bank $ 473,484 13.81 % $ 248,676 7.25 % $ 291,473 8.50 % $ 274,327 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 421,698 12.29 % $ 197,325 5.75 % $ 240,158 7.00 % N/A N/A Tri Counties Bank $ 473,484 13.81 % $ 197,225 5.75 % $ 240,036 7.00 % $ 222,891 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 475,939 10.77 % $ 176,753 4.00 % $ 176,753 4.00 % N/A N/A Tri Counties Bank $ 473,484 10.72 % $ 176,749 4.00 % $ 176,749 4.00 % $ 220,936 5.00 % Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2016: Total Capital (to Risk Weighted Assets): Consolidated $ 503,283 14.65 % $ 296,336 8.625 % $ 360,756 10.50 % N/A N/A Tri Counties Bank $ 500,876 14.59 % $ 296,188 8.625 % $ 360,577 10.50 % $ 343,407 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 468,061 13.62 % $ 227,620 6.625 % $ 292,041 8.50 % N/A N/A Tri Counties Bank $ 465,654 13.56 % $ 227,507 6.625 % $ 291,896 8.50 % $ 274,725 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 414,632 12.07 % $ 176,084 5.125 % $ 240,504 7.00 % N/A N/A Tri Counties Bank $ 465,654 13.56 % $ 175,996 5.125 % $ 240,385 7.00 % $ 223,214 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 468,061 10.62 % $ 176,346 4.00 % $ 176,346 4.00 % N/A N/A Tri Counties Bank $ 465,654 10.56 % $ 176,341 4.00 % $ 176,341 4.00 % $ 220,426 5.00 %

Summary of Quarterly Results 67

Summary of Quarterly Results of Operations (unaudited) (Tables)	3 Months Ended
	Mar. 31, 2017
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. 2017 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 $ 112 Discount accretion PCI – other 631 Discount accretion PNCI 798 All other loan interest income 33,373 Total loan interest income 34,914 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,570 Total interest income 43,484 Interest expense 1,491 Net interest income 41,993 (Benefit from reversal of) provision for loan losses (1,557 ) Net interest income after provision for loan losses 43,550 Noninterest income 11,703 Noninterest expense 35,822 Income before income taxes 19,431 Income tax expense 7,352 Net income $ 12,079 Per common share: Net income (diluted) $ 0.52 Dividends $ 0.15 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 $ 483 $ 777 $ 426 $ 269 Discount accretion PCI – other 658 569 415 (45 ) Discount accretion PNCI 637 883 1,459 868 All other loan interest income 34,463 33,540 32,038 33,646 Total loan interest income 36,241 35,769 34,338 34,738 Debt securities, dividends and interest bearing cash at Banks (not FTE) 8,374 7,940 8,252 8,056 Total interest income 44,615 43,709 42,590 42,794 Interest expense 1,460 1,439 1,430 1,392 Net interest income 43,155 42,270 41,160 41,402 (Benefit from reversal of) provision for loan losses (1,433 ) (3,973 ) (773 ) 209 Net interest income after provision for loan losses 44,588 46,243 41,933 41,193 Noninterest income 12,462 11,066 11,245 9,790 Noninterest expense 36,563 37,416 38,267 33,751 Income before income taxes 20,487 19,893 14,911 17,232 Income tax expense 7,954 7,694 5,506 6,558 Net income $ 12,533 $ 12,199 $ 9,405 $ 10,674 Per common share: Net income (diluted) $ 0.54 $ 0.53 $ 0.41 $ 0.46 Dividends $ 0.15 $ 0.15 $ 0.15 $ 0.15

Summary of Significant Accoun68

Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2017USD ($)BranchesSegmentTrustLocationBusiness	Dec. 31, 2016USD ($)
Significant Of Accounting Policies [Line Items]
Number of subsidiary business trusts | Trust	5
Company's investments in the trusts	$ 1,703,000
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	10
California [Member]
Significant Of Accounting Policies [Line Items]
Number of counties | Business	26
ASU 2016-09 [Member]
Significant Of Accounting Policies [Line Items]
Recognition of excess tax benefits	$ 90,000
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 ($)Branches	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Goodwill recognized		$ 64,311,000	$ 64,311,000
Bank of America [Member]
Business Acquisition [Line Items]
Number of branches | Branches	3
Acquisition, completion date	Oct. 28, 2015
Cash consideration	$ 3,204,000
Deposits	161,231,000
Loans	289,000
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 ($) $ in Thousands	Mar. 18, 2016	Mar. 31, 2017	Dec. 31, 2016
Liabilities assumed:
Goodwill recognized		$ 64,311	$ 64,311
Bank of America [Member]
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

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, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 64,311	$ 64,311
Bank of America [Member]
Business Acquisition [Line Items]
Cash paid	$ 3,204
Cost basis net assets acquired	0
Fair Value Adjustments, Premises and Equipment	(309)
Core deposit intangible	(2,046)
Goodwill	849
Bank of America [Member] | Loans [Member]
Business Acquisition [Line Items]
Fair Value Adjustments	$ 0

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Values of Investments in Debt and Equity Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 579,802	$ 559,103
Gross Unrealized Gains	2,167	2,216
Gross Unrealized Losses	(10,250)	(11,086)
Estimated Fair Value	571,719	550,233
Amortized Cost, Held to Maturity	580,137	602,536
Gross Unrealized Gains, Held to Maturity	5,753	5,057
Gross Unrealized Losses, Held to Maturity	(4,074)	(4,390)
Estimated Fair Value, Held to Maturity	581,816	603,203
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	455,093	434,357
Gross Unrealized Gains	1,846	1,949
Gross Unrealized Losses	(6,323)	(6,628)
Estimated Fair Value	450,616	429,678
Amortized Cost, Held to Maturity	565,578	587,982
Gross Unrealized Gains, Held to Maturity	5,652	5,001
Gross Unrealized Losses, Held to Maturity	(3,906)	(4,199)
Estimated Fair Value, Held to Maturity	567,324	588,784
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	121,709	121,746
Gross Unrealized Gains	321	267
Gross Unrealized Losses	(3,865)	(4,396)
Estimated Fair Value	118,165	117,617
Amortized Cost, Held to Maturity	14,559	14,554
Gross Unrealized Gains, Held to Maturity	101	56
Gross Unrealized Losses, Held to Maturity	(168)	(191)
Estimated Fair Value, Held to Maturity	14,492	14,419
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,000	3,000
Gross Unrealized Losses	(62)	(62)
Estimated Fair Value	$ 2,938	$ 2,938

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017USD ($)Investmentsecurities	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Investment Securities [Line Items]
Investment securities sold | $	$ 0	$ 0
Investment securities carrying value | $	280,534,000		$ 292,737,000
Residential real estate mortgage-backed securities | $	$ 1,020,671,000
Life of mortgage-backed securities	6 years
Obligations of U.S. Government Corporations and Agencies [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	58
Percentage of aggregate depreciation in unrealized losses	1.72%
Obligations of States and Political Subdivisions [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	100
Percentage of aggregate depreciation in unrealized losses	4.21%
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Debt securities | Investmentsecurities	2
Percentage of aggregate depreciation in unrealized losses	2.07%

Investment Securities - Amort74

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Due in one year, Amortized Cost	$ 5
Due after one year through five years, Amortized Cost	8,290
Due after five years through ten years, Amortized Cost	13,806
Due after ten years, Amortized Cost	557,701
Totals, Amortized Cost	579,802
Due in one year, Estimated Fair Value	5
Due after one year through five years, Estimated Fair Value	8,519
Due after five years through ten years, Estimated Fair Value	14,344
Due after ten years, Estimated Fair Value	548,851
Totals, Estimated Fair Value	571,719
Due in one year, Amortized Cost, Held to Maturity	0
Due after one year through five years, Amortized Cost, Held to Maturity	1,184
Due after five years through ten years, Amortized Cost, Held to Maturity	4,539
Due after ten years, Amortized Cost, Held to Maturity	574,414
Totals, Amortized Cost, Held to Maturity	580,137	$ 602,536
Due in one year, Estimated Fair Value, Held to Maturity	0
Due after one year through five years, Estimated Fair Value, Held to Maturity	1,213
Due after five years through ten years, Estimated Fair Value, Held to Maturity	4,574
Due after ten years, Estimated Fair Value, Held to Maturity	576,029
Estimated Fair Value, Held to Maturity	$ 581,816	$ 603,203

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses on Investment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 446,413	$ 464,152
Less than 12 months, Unrealized Loss	(10,250)	(11,086)
12 months or more, Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Fair Value	446,413	464,152
Total Unrealized Loss	(10,250)	(11,086)
Less than 12 months, Fair Value, held to maturity	233,968	290,481
Less than 12 months, Unrealized Loss, held to maturity	(4,074)	(4,390)
12 months or more, Fair Value, held to maturity	0	0
12 months or more, Unrealized Loss, held to maturity	0	0
Total Fair Value, held to maturity	233,968	290,481
Total Unrealized Loss, held to maturity	(4,074)	(4,390)
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	359,657	370,389
Less than 12 months, Unrealized Loss	(6,323)	(6,628)
12 months or more, Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Fair Value	359,657	370,389
Total Unrealized Loss	(6,323)	(6,628)
Less than 12 months, Fair Value, held to maturity	226,101	280,497
Less than 12 months, Unrealized Loss, held to maturity	(3,906)	(4,199)
12 months or more, Fair Value, held to maturity	0	0
12 months or more, Unrealized Loss, held to maturity	0	0
Total Fair Value, held to maturity	226,101	280,497
Total Unrealized Loss, held to maturity	(3,906)	(4,199)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	83,818	90,825
Less than 12 months, Unrealized Loss	(3,865)	(4,396)
12 months or more, Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Fair Value	83,818	90,825
Total Unrealized Loss	(3,865)	(4,396)
Less than 12 months, Fair Value, held to maturity	7,867	9,984
Less than 12 months, Unrealized Loss, held to maturity	(168)	(191)
12 months or more, Fair Value, held to maturity	0	0
12 months or more, Unrealized Loss, held to maturity	0	0
Total Fair Value, held to maturity	7,867	9,984
Total Unrealized Loss, held to maturity	(168)	(191)
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	2,938	2,938
Less than 12 months, Unrealized Loss	(62)	(62)
12 months or more, Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Fair Value	2,938	2,938
Total Unrealized Loss	$ (62)	$ (62)

Loans - Summary of Loan Balance

Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	$ 2,761,192	$ 2,759,593	$ 2,541,547
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,761,192	2,759,593	2,541,547
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,761,192	2,759,593	2,541,547
Total loans, net of deferred loan fees and discounts	2,761,192	2,759,593	2,541,547
Commercial	2,785,318	2,785,312
Unamortized net deferred loan fees	(6,713)	(6,916)
Discounts to principal balance of loans owed, net of charge-offs	(17,413)	(18,803)
Total loans, net of unamortized deferred loan fees and discounts	2,761,192	2,759,593	2,541,547
Noncovered loans	2,758,211	2,756,417
Covered loans	2,981	3,176
Total loans, net of unamortized deferred loan fees and discounts	2,761,192	2,759,593	2,541,547
Allowance for loan losses	(31,017)	(32,503)	(36,388)	$ (36,011)
Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Total loans, net of deferred loan fees and discounts	2,070,815	2,057,824
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Construction:
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Total loans, net of deferred loan fees and discounts	353,150	362,303
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Commercial Portfolio Segment [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047
Construction:
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047
Total loans, net of deferred loan fees and discounts	212,685	217,047
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047
Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Construction:
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Total loans, net of deferred loan fees and discounts	124,542	122,419
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907
Construction:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907
Total loans, net of deferred loan fees and discounts	309,701	309,907
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907
Home Equity Loans [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Construction:
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Total loans, net of deferred loan fees and discounts	40,241	41,822	41,365
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Allowance for loan losses	(2,420)	(2,617)	(3,111)	(3,138)
Other Consumer [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Construction:
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Total loans, net of deferred loan fees and discounts	29,313	30,766	32,945
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Allowance for loan losses	(595)	(622)	(687)	(688)
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Total loans, net of deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Allowance for loan losses	(11,953)	(11,905)	(11,895)	(11,443)
Commercial [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	76,018
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	76,018
Construction:
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	76,018
Total loans, net of deferred loan fees and discounts	64,843	66,990	76,018
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	76,018
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	76,018
Allowance for loan losses	(572)	(680)	(818)	(812)
Home Equity Lines of Credit [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Construction:
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Total loans, net of deferred loan fees and discounts	283,596	289,715	312,691
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Allowance for loan losses	(6,530)	(7,044)	(9,907)	(11,253)
Residential [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Construction:
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Total loans, net of deferred loan fees and discounts	309,701	309,907	315,135
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Allowance for loan losses	(2,282)	(2,387)	(2,765)	(2,507)
Residential [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Construction:
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Total loans, net of deferred loan fees and discounts	59,699	55,429	52,983
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Allowance for loan losses	(1,339)	(1,417)	$ (1,066)	$ (899)
Originated [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
Total loans, net of deferred loan fees and discounts	2,382,325	2,356,327
Commercial	2,389,038	2,363,243
Unamortized net deferred loan fees	(6,713)	(6,916)
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
Noncovered loans	2,382,325	2,356,327
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
Allowance for loan losses	(27,180)	(28,141)
Originated [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,746,710	1,714,029
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,746,710	1,714,029
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,746,710	1,714,029
Total loans, net of deferred loan fees and discounts	1,746,710	1,714,029
Total loans, net of unamortized deferred loan fees and discounts	1,746,710	1,714,029
Total loans, net of unamortized deferred loan fees and discounts	1,746,710	1,714,029
Originated [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	322,471	328,831
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	322,471	328,831
Construction:
Total loans, net of unamortized deferred loan fees and discounts	322,471	328,831
Total loans, net of deferred loan fees and discounts	322,471	328,831
Total loans, net of unamortized deferred loan fees and discounts	322,471	328,831
Total loans, net of unamortized deferred loan fees and discounts	322,471	328,831
Originated [Member] | Commercial Portfolio Segment [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Construction:
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Total loans, net of deferred loan fees and discounts	198,554	200,735
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Originated [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	114,590	112,732
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	114,590	112,732
Construction:
Total loans, net of unamortized deferred loan fees and discounts	114,590	112,732
Total loans, net of deferred loan fees and discounts	114,590	112,732
Total loans, net of unamortized deferred loan fees and discounts	114,590	112,732
Total loans, net of unamortized deferred loan fees and discounts	114,590	112,732
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Construction:
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Total loans, net of deferred loan fees and discounts	237,336	229,609
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Construction:
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Total loans, net of deferred loan fees and discounts	35,725	37,074
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Construction:
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Total loans, net of deferred loan fees and discounts	26,777	28,167
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Total loans, net of deferred loan fees and discounts	1,509,374	1,484,420
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Originated [Member] | Commercial [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Construction:
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Total loans, net of deferred loan fees and discounts	55,872	58,119
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Construction:
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Total loans, net of deferred loan fees and discounts	259,969	263,590
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Originated [Member] | Residential [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
Construction:
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
Total loans, net of deferred loan fees and discounts	58,718	54,613
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
PNCI [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
Construction:
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
Total loans, net of deferred loan fees and discounts	355,329	378,222
Commercial	364,451	388,139
Discounts to principal balance of loans owed, net of charge-offs	(9,122)	(9,917)
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
Noncovered loans	355,329	378,222
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
Allowance for loan losses	(1,406)	(1,665)
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	310,396	328,972
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	310,396	328,972
Construction:
Total loans, net of unamortized deferred loan fees and discounts	310,396	328,972
Total loans, net of deferred loan fees and discounts	310,396	328,972
Total loans, net of unamortized deferred loan fees and discounts	310,396	328,972
Total loans, net of unamortized deferred loan fees and discounts	310,396	328,972
PNCI [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	25,475	27,917
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	25,475	27,917
Construction:
Total loans, net of unamortized deferred loan fees and discounts	25,475	27,917
Total loans, net of deferred loan fees and discounts	25,475	27,917
Total loans, net of unamortized deferred loan fees and discounts	25,475	27,917
Total loans, net of unamortized deferred loan fees and discounts	25,475	27,917
PNCI [Member] | Commercial Portfolio Segment [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
Construction:
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
Total loans, net of deferred loan fees and discounts	10,350	12,321
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
PNCI [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	9,108	9,012
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	9,108	9,012
Construction:
Total loans, net of unamortized deferred loan fees and discounts	9,108	9,012
Total loans, net of deferred loan fees and discounts	9,108	9,012
Total loans, net of unamortized deferred loan fees and discounts	9,108	9,012
Total loans, net of unamortized deferred loan fees and discounts	9,108	9,012
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
Construction:
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
Total loans, net of deferred loan fees and discounts	71,006	78,935
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
Construction:
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
Total loans, net of deferred loan fees and discounts	3,383	3,618
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
Total loans, net of deferred loan fees and discounts	2,470	2,534
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
Construction:
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
Total loans, net of deferred loan fees and discounts	239,390	250,037
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
PNCI [Member] | Commercial [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Construction:
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Total loans, net of deferred loan fees and discounts	8,971	8,871
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
Construction:
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
Total loans, net of deferred loan fees and discounts	19,622	21,765
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
PNCI [Member] | Residential [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	137	141
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	137	141
Construction:
Total loans, net of unamortized deferred loan fees and discounts	137	141
Total loans, net of deferred loan fees and discounts	137	141
Total loans, net of unamortized deferred loan fees and discounts	137	141
Total loans, net of unamortized deferred loan fees and discounts	137	141
PCI - Cash Basis [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Total loans, net of deferred loan fees and discounts	2,753	2,983
Commercial	7,848	8,280
Discounts to principal balance of loans owed, net of charge-offs	(5,095)	(5,297)
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Noncovered loans	2,753	2,983
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Allowance for loan losses	(8)	(17)
PCI - Cash Basis [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Total loans, net of deferred loan fees and discounts	2,753	2,983
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
PCI - Cash Basis [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Total loans, net of deferred loan fees and discounts	2,753	2,983
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
Total loans, net of unamortized deferred loan fees and discounts	2,753	2,983
PCI - Other [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	20,785	22,061
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	20,785	22,061
Construction:
Total loans, net of unamortized deferred loan fees and discounts	20,785	22,061
Total loans, net of deferred loan fees and discounts	20,785	22,061
Commercial	23,981	25,650
Discounts to principal balance of loans owed, net of charge-offs	(3,196)	(3,589)
Total loans, net of unamortized deferred loan fees and discounts	20,785	22,061
Noncovered loans	17,804	18,885
Covered loans	2,981	3,176
Total loans, net of unamortized deferred loan fees and discounts	20,785	22,061
Allowance for loan losses	(2,423)	(2,680)
PCI - Other [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	13,709	14,823
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	13,709	14,823
Construction:
Total loans, net of unamortized deferred loan fees and discounts	13,709	14,823
Total loans, net of deferred loan fees and discounts	13,709	14,823
Total loans, net of unamortized deferred loan fees and discounts	13,709	14,823
Total loans, net of unamortized deferred loan fees and discounts	13,709	14,823
PCI - Other [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	2,451	2,572
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	2,451	2,572
Construction:
Total loans, net of unamortized deferred loan fees and discounts	2,451	2,572
Total loans, net of deferred loan fees and discounts	2,451	2,572
Total loans, net of unamortized deferred loan fees and discounts	2,451	2,572
Total loans, net of unamortized deferred loan fees and discounts	2,451	2,572
PCI - Other [Member] | Commercial Portfolio Segment [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
Construction:
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
Total loans, net of deferred loan fees and discounts	3,781	3,991
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
PCI - Other [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Construction:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Total loans, net of deferred loan fees and discounts	844	675
Total loans, net of unamortized deferred loan fees and discounts	844	675
Total loans, net of unamortized deferred loan fees and discounts	844	675
PCI - Other [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
Total loans, net of deferred loan fees and discounts	1,359	1,363
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
PCI - Other [Member] | Home Equity Loans [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
Total loans, net of deferred loan fees and discounts	1,133	1,130
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
PCI - Other [Member] | Other Consumer [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	66	65
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	66	65
Construction:
Total loans, net of unamortized deferred loan fees and discounts	66	65
Total loans, net of deferred loan fees and discounts	66	65
Total loans, net of unamortized deferred loan fees and discounts	66	65
Total loans, net of unamortized deferred loan fees and discounts	66	65
PCI - Other [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
Construction:
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
Total loans, net of deferred loan fees and discounts	12,350	13,460
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
PCI - Other [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	1,252	1,377
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	1,252	1,377
Construction:
Total loans, net of unamortized deferred loan fees and discounts	1,252	1,377
Total loans, net of deferred loan fees and discounts	1,252	1,377
Total loans, net of unamortized deferred loan fees and discounts	1,252	1,377
Total loans, net of unamortized deferred loan fees and discounts	1,252	1,377
PCI - Other [Member] | Residential [Member] | Construction [Member]
Mortgage loans on real estate:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Consumer:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Construction:
Total loans, net of unamortized deferred loan fees and discounts	844	675
Total loans, net of deferred loan fees and discounts	844	675
Total loans, net of unamortized deferred loan fees and discounts	844	675
Total loans, net of unamortized deferred loan fees and discounts	$ 844	$ 675

Loans - Change in Accretable Yi

Loans - Change in Accretable Yield for PCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Change in accretable yield:
Balance at beginning of period	$ 10,348	$ 13,255
Accretion to interest income	(902)	(1,091)
Reclassification from (to) nonaccretable difference	114	(184)
Balance at end of period	$ 9,560	$ 11,980

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, 2017	Mar. 31, 2016	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 2,761,192	$ 2,541,547	$ 2,759,593
Individ. evaluated for impairment	27,650	31,338	28,140
Loans pooled for evaluation	2,710,005	2,477,150	2,706,409
Beginning balance	32,503	36,011	36,011
Charge-offs	(409)	(1,289)	(3,230)
Recoveries	480	1,457	5,692
(Benefit) provision	(1,557)	209	(5,970)
Ending balance	31,017	36,388	32,503
Ending balance:
Individ. evaluated for impairment	1,686	3,720	2,046
Loans pooled for evaluation	26,900	29,670	27,760
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,070,815		2,057,824
Mortgage Loans on Real Estate [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	309,701	315,135	309,907
Individ. evaluated for impairment	3,849	7,015	3,785
Loans pooled for evaluation	304,493	306,484	304,759
Beginning balance	2,387	2,507	2,507
Charge-offs		(37)	(321)
Recoveries		2	880
(Benefit) provision	(105)	293	(679)
Ending balance	2,282	2,765	2,387
Ending balance:
Individ. evaluated for impairment	249	454	249
Loans pooled for evaluation	1,808	2,094	1,952
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,513,853	1,747,917
Individ. evaluated for impairment	16,979	12,230	15,748
Loans pooled for evaluation	1,731,785	1,484,434	1,718,709
Beginning balance	11,905	11,443	11,443
Charge-offs		(793)	(827)
Recoveries	110	817	920
(Benefit) provision	(62)	428	369
Ending balance	11,953	11,895	11,905
Ending balance:
Individ. evaluated for impairment	124	295	127
Loans pooled for evaluation	10,382	10,141	10,329
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	353,150		362,303
Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	283,596	312,691	289,715
Individ. evaluated for impairment	2,204	5,994	3,196
Loans pooled for evaluation	277,388	299,407	282,159
Beginning balance	7,044	11,253	11,253
Charge-offs	(71)	(214)	(585)
Recoveries	46	281	2,317
(Benefit) provision	(489)	(1,413)	(5,941)
Ending balance	6,530	9,907	7,044
Ending balance:
Individ. evaluated for impairment	400	705	410
Loans pooled for evaluation	6,122	9,083	6,618
Consumer and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	212,685	196,557	217,047
Individ. evaluated for impairment	3,072	3,871	4,096
Loans pooled for evaluation	205,832	188,155	208,960
Beginning balance	5,831	5,271	5,271
Charge-offs	(133)	(38)	(455)
Recoveries	170	177	404
(Benefit) provision	(542)	729	611
Ending balance	5,326	6,139	5,831
Ending balance:
Individ. evaluated for impairment	811	1,934	1,130
Loans pooled for evaluation	3,873	3,053	3,765
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	124,542		122,419
Construction [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	59,699	52,983	55,429
Individ. evaluated for impairment	25		11
Loans pooled for evaluation	58,830	52,271	54,743
Beginning balance	1,417	899	899
Recoveries			54
(Benefit) provision	(78)	167	464
Ending balance	1,339	1,066	1,417
Ending balance:
Individ. evaluated for impairment	14
Loans pooled for evaluation	1,282	1,014	1,371
Construction [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	64,843	76,018	66,990
Loans pooled for evaluation	64,843	76,018	66,990
Beginning balance	680	812	812
Recoveries	1	1	78
(Benefit) provision	(109)	5	(210)
Ending balance	572	818	680
Ending balance:
Loans pooled for evaluation	572	818	680
Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,365	41,822
Individ. evaluated for impairment	1,241	1,928	1,150
Loans pooled for evaluation	37,867	37,800	39,542
Beginning balance	2,617	3,138	3,138
Charge-offs	(31)		(219)
Recoveries	12	49	590
(Benefit) provision	(178)	(76)	(892)
Ending balance	2,420	3,111	2,617
Ending balance:
Individ. evaluated for impairment	57	248	102
Loans pooled for evaluation	2,297	2,864	2,451
Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	29,313	32,945	30,766
Individ. evaluated for impairment	280	300	154
Loans pooled for evaluation	28,967	32,581	30,547
Beginning balance	622	688	688
Charge-offs	(174)	(207)	(823)
Recoveries	141	130	449
(Benefit) provision	6	76	308
Ending balance	595	687	622
Ending balance:
Individ. evaluated for impairment	31	84	28
Loans pooled for evaluation	564	603	594
Receivables Acquired with Deteriorated Credit Quality [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	23,537	33,059	25,044
Ending balance:
Loans acquired with deteriorated credit quality	2,431	2,998	2,697
Receivables Acquired with Deteriorated Credit Quality [Member] | Mortgage Loans on Real Estate [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,636	1,363
Ending balance:
Loans acquired with deteriorated credit quality	225	217	186
Receivables Acquired with Deteriorated Credit Quality [Member] | Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	12,350	17,189	13,460
Ending balance:
Loans acquired with deteriorated credit quality	1,447	1,459	1,449
Receivables Acquired with Deteriorated Credit Quality [Member] | Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,004	7,290	4,360
Ending balance:
Loans acquired with deteriorated credit quality	8	117	17
Receivables Acquired with Deteriorated Credit Quality [Member] | Consumer and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,781	4,531	3,991
Ending balance:
Loans acquired with deteriorated credit quality	642	1,153	936
Receivables Acquired with Deteriorated Credit Quality [Member] | Construction [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	844	712	675
Ending balance:
Loans acquired with deteriorated credit quality	43	52	45
Receivables Acquired with Deteriorated Credit Quality [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,637	1,130
Ending balance:
Loans acquired with deteriorated credit quality	66		64
Receivables Acquired with Deteriorated Credit Quality [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 66	$ 64	$ 65

Allowance for Loan Losses - Pre

Allowance for Loan Losses - Presentation of Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 2,761,192	$ 2,759,593	$ 2,541,547
Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,382,325	2,356,327
PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	355,329	378,222
PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	23,538	25,044
Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,317,978	2,305,293
Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	338,377	360,043
Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	39,653	27,571
Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	8,533	8,549
Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	24,694	23,463
Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	8,419	9,630
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,070,815	2,057,824
Mortgage Loans on Real Estate [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	309,701	309,907	315,135
Mortgage Loans on Real Estate [Member] | Residential [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	237,336	229,609
Mortgage Loans on Real Estate [Member] | Residential [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	71,006	78,935
Mortgage Loans on Real Estate [Member] | Residential [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,359	1,363
Mortgage Loans on Real Estate [Member] | Residential [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	233,189	224,988
Mortgage Loans on Real Estate [Member] | Residential [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	68,062	75,600
Mortgage Loans on Real Estate [Member] | Residential [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,031	2,225
Mortgage Loans on Real Estate [Member] | Residential [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,723	1,849
Mortgage Loans on Real Estate [Member] | Residential [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,116	2,396
Mortgage Loans on Real Estate [Member] | Residential [Member] | Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,221	1,486
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,761,114	1,747,917	1,513,853
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,509,374	1,484,420
Mortgage Loans on Real Estate [Member] | Commercial [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	239,390	250,037
Mortgage Loans on Real Estate [Member] | Commercial [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	12,350	13,460
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,476,126	1,457,128
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	227,038	236,740
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	21,022	15,108
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,973	6,057
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	12,226	12,184
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	6,379	7,240
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	353,150	362,303
Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	283,596	289,715	312,691
Consumer [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	259,969	263,590
Consumer [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	19,622	21,765
Consumer [Member] | Home Equity Lines of Credit [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,005	4,360
Consumer [Member] | Home Equity Lines of Credit [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	255,326	258,024
Consumer [Member] | Home Equity Lines of Credit [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	18,231	20,442
Consumer [Member] | Home Equity Lines of Credit [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,401	2,518
Consumer [Member] | Home Equity Lines of Credit [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	688	509
Consumer [Member] | Home Equity Lines of Credit [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,242	3,048
Consumer [Member] | Home Equity Lines of Credit [Member] | Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	703	814
Consumer [Member] | Home Equity Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	40,241	41,822	41,365
Consumer [Member] | Home Equity Loans [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	35,725	37,074
Consumer [Member] | Home Equity Loans [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,383	3,618
Consumer [Member] | Home Equity Loans [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,133	1,130
Consumer [Member] | Home Equity Loans [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	32,480	34,299
Consumer [Member] | Home Equity Loans [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,180	3,492
Consumer [Member] | Home Equity Loans [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,352	891
Consumer [Member] | Home Equity Loans [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	90	41
Consumer [Member] | Home Equity Loans [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,893	1,884
Consumer [Member] | Home Equity Loans [Member] | Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	113	85
Consumer [Member] | Other Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	29,313	30,766	32,945
Consumer [Member] | Other Consumer [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	26,777	28,167
Consumer [Member] | Other Consumer [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,470	2,534
Consumer [Member] | Other Consumer [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	66	65
Consumer [Member] | Other Consumer [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	26,181	27,542
Consumer [Member] | Other Consumer [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,409	2,437
Consumer [Member] | Other Consumer [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	389	385
Consumer [Member] | Other Consumer [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	58	92
Consumer [Member] | Other Consumer [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	207	240
Consumer [Member] | Other Consumer [Member] | Substandard [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3	5
Consumer and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	212,685	217,047	196,557
Consumer and Industrial [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	198,554	200,735
Consumer and Industrial [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,350	12,321
Consumer and Industrial [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,781	3,991
Consumer and Industrial [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	187,333	190,902
Consumer and Industrial [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,349	12,320
Consumer and Industrial [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,222	6,133
Consumer and Industrial [Member] | Special Mention [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1	1
Consumer and Industrial [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,999	3,700
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	124,542	122,419
Construction [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	59,699	55,429	52,983
Construction [Member] | Residential [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	58,718	54,613
Construction [Member] | Residential [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	137	141
Construction [Member] | Residential [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	844	675
Construction [Member] | Residential [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	58,707	54,602
Construction [Member] | Residential [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	137	141
Construction [Member] | Residential [Member] | Substandard [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	11	11
Construction [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	64,843	66,990	$ 76,018
Construction [Member] | Commercial [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,872	58,119
Construction [Member] | Commercial [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Construction [Member] | Commercial [Member] | Pass [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	48,636	57,808
Construction [Member] | Commercial [Member] | Pass [Member] | PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	8,971	8,871
Construction [Member] | Commercial [Member] | Special Mention [Member] | Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 7,236	$ 311

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017USD ($)Category	Dec. 31, 2016USD ($)	Mar. 31, 2016USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Number of categories occupied under commercial real estate loans | Category	2
Originated Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Impaired TDR Loans	$ 12,285,000	$ 12,371,000	$ 15,921,000
Additional funds in TDR	70,000	25,000	15,000
PNCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Impaired TDR Loans	1,470,000	1,324,000	1,792,000
Obligations to lend additional funds on TDR	$ 0	$ 0	$ 0
Minimum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Period of collateral payment of loan	3 months
Maximum [Member]
Loans and Leases Receivable Disclosure [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, 2017	Dec. 31, 2016
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 11,122	$ 8,687
Current	2,371,204	2,347,640
Total orig. loans	2,382,326	2,356,327
> 90 Days and still accruing	1,837
Nonaccrual loans	11,384	12,894
PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,453	2,600
Current	353,876	375,622
Total orig. loans	355,329	378,222
Nonaccrual loans	2,135	2,834
30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6,031	4,354
30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,309	1,896
60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,247	2,586
> 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,844	1,747
> 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	144	704
Mortgage Loans on Real Estate [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	845	691
Current	236,491	228,918
Total orig. loans	237,336	229,609
Nonaccrual loans	473	255
Mortgage Loans on Real Estate [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	430	1,531
Current	70,576	77,404
Total orig. loans	71,006	78,935
Nonaccrual loans	164	194
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,764	2,050
Current	1,505,610	1,482,370
Total orig. loans	1,509,374	1,484,420
> 90 Days and still accruing	1,712
Nonaccrual loans	7,485	7,736
Mortgage Loans on Real Estate [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	750	154
Current	238,640	249,883
Total orig. loans	239,390	250,037
Nonaccrual loans	1,760	1,826
Mortgage Loans on Real Estate [Member] | 30-59 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	845	552
Mortgage Loans on Real Estate [Member] | 30-59 Days [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	367	1,510
Mortgage Loans on Real Estate [Member] | 30-59 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,855	317
Mortgage Loans on Real Estate [Member] | 30-59 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	669	73
Mortgage Loans on Real Estate [Member] | 60-89 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		139
Mortgage Loans on Real Estate [Member] | 60-89 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	74	1,517
Mortgage Loans on Real Estate [Member] | > 90 Days [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	63	21
Mortgage Loans on Real Estate [Member] | > 90 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,835	216
Mortgage Loans on Real Estate [Member] | > 90 Days [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	81	81
Consumer [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	989	1,441
Current	258,981	262,149
Total orig. loans	259,970	263,590
Nonaccrual loans	798	1,211
Consumer [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	270	863
Current	19,352	20,902
Total orig. loans	19,622	21,765
Nonaccrual loans	151	742
Consumer [Member] | 30-59 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	424	754
Consumer [Member] | 30-59 Days [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	270	274
Consumer [Member] | 60-89 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	461
Consumer [Member] | > 90 Days [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	104	687
Consumer [Member] | > 90 Days [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		589
Consumer [Member] | Home Equity Loans [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,135	1,225
Current	34,590	35,849
Total orig. loans	35,725	37,074
Nonaccrual loans	822	718
Consumer [Member] | Home Equity Loans [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		52
Current	3,383	3,566
Total orig. loans	3,383	3,618
Nonaccrual loans	58	67
Consumer [Member] | Home Equity Loans [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	640	646
Consumer [Member] | Home Equity Loans [Member] | 30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		39
Consumer [Member] | Home Equity Loans [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	176	395
Consumer [Member] | Home Equity Loans [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	319	184
Consumer [Member] | Home Equity Loans [Member] | > 90 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		13
Consumer [Member] | Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	133	61
Current	26,644	28,106
Total orig. loans	26,777	28,167
Nonaccrual loans	12	33
Consumer [Member] | Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3
Current	2,467	2,534
Total orig. loans	2,470	2,534
Nonaccrual loans	2	5
Consumer [Member] | Other Consumer [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	119	16
Consumer [Member] | Other Consumer [Member] | 30-59 Days [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3
Consumer [Member] | Other Consumer [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	9	30
Consumer [Member] | Other Consumer [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	5	15
Consumer and Industrial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,824	1,866
Current	194,730	198,869
Total orig. loans	198,554	200,735
> 90 Days and still accruing	125
Nonaccrual loans	1,769	2,930
Consumer and Industrial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,350	12,321
Total orig. loans	10,350	12,321
Consumer and Industrial [Member] | 30-59 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,727	1,148
Consumer and Industrial [Member] | 60-89 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,527	84
Consumer and Industrial [Member] | > 90 Days [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	570	634
Construction [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	11	932
Current	58,707	53,681
Total orig. loans	58,718	54,613
Nonaccrual loans	25	11
Construction [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	137	141
Total orig. loans	137	141
Construction [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	421	421
Current	55,451	57,698
Total orig. loans	55,872	58,119
Construction [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	8,971	8,871
Total orig. loans	8,971	8,871
Construction [Member] | 30-59 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		921
Construction [Member] | 30-59 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	421
Construction [Member] | 60-89 Days [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		421
Construction [Member] | > 90 Days [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 11	$ 11

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	$ 19,325	$ 16,865	$ 17,701
Unpaid principal, With no related allowance recorded	20,237	23,001	18,641
Average recorded Investment, With no related allowance recorded	27,413	26,185	26,601
Interest income Recognized, With no related allowance recorded	132	109	757
Recorded investment, With an allowance recorded	4,703	8,752	6,285
Unpaid principal, With an allowance recorded	4,783	9,010	6,349
Related allowance, With an allowance recorded	1,192	3,155	1,544
Average recorded Investment, With an allowance recorded	6,310	8,334	7,100
Interest income Recognized, With an allowance recorded	40	76	206
PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	2,626	2,126	3,094
Unpaid principal, With no related allowance recorded	2,905	2,311	3,341
Average recorded Investment, With no related allowance recorded	2,842	2,592	3,075
Interest income Recognized, With no related allowance recorded	5	2	17
Recorded investment, With an allowance recorded	996	3,595	1,060
Unpaid principal, With an allowance recorded	996	3,708	1,060
Related allowance, With an allowance recorded	494	565	502
Average recorded Investment, With an allowance recorded	2,312	3,611	2,344
Interest income Recognized, With an allowance recorded	10	14	49
Mortgage Loans on Real Estate [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	1,782	3,806	1,691
Unpaid principal, With no related allowance recorded	1,793	5,963	1,699
Average recorded Investment, With no related allowance recorded	2,834	3,846	2,788
Interest income Recognized, With no related allowance recorded	20	19	83
Recorded investment, With an allowance recorded	1,378	1,991	1,372
Unpaid principal, With an allowance recorded	1,382	2,065	1,372
Related allowance, With an allowance recorded	172	324	170
Average recorded Investment, With an allowance recorded	1,692	1,998	1,689
Interest income Recognized, With an allowance recorded	11	13	56
Mortgage Loans on Real Estate [Member] | Residential [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	433	604	463
Unpaid principal, With no related allowance recorded	455	643	486
Average recorded Investment, With no related allowance recorded	654	740	669
Interest income Recognized, With no related allowance recorded	2	2	7
Recorded investment, With an allowance recorded	256	614	259
Unpaid principal, With an allowance recorded	256	614	259
Related allowance, With an allowance recorded	77	130	79
Average recorded Investment, With an allowance recorded	128	307	130
Interest income Recognized, With an allowance recorded	2	2	10
Mortgage Loans on Real Estate [Member] | Commercial [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	14,431	7,917	13,144
Unpaid principal, With no related allowance recorded	14,881	8,393	13,488
Average recorded Investment, With no related allowance recorded	20,770	17,513	20,126
Interest income Recognized, With no related allowance recorded	98	72	581
Recorded investment, With an allowance recorded	640	1,440	646
Unpaid principal, With an allowance recorded	640	1,480	646
Related allowance, With an allowance recorded	18	175	19
Average recorded Investment, With an allowance recorded	1,029	1,429	1,032
Interest income Recognized, With an allowance recorded	9	20	37
Mortgage Loans on Real Estate [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	1,777	844	1,826
Unpaid principal, With no related allowance recorded	2,011	908	2,031
Average recorded Investment, With no related allowance recorded	1,455	988	1,479
Recorded investment, With an allowance recorded	131	2,029	132
Unpaid principal, With an allowance recorded	131	2,142	132
Related allowance, With an allowance recorded	106	120	108
Average recorded Investment, With an allowance recorded	1,440	2,389	1,440
Interest income Recognized, With an allowance recorded	2	2	7
Consumer [Member] | Home Equity Lines of Credit [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	1,064	3,457	1,480
Unpaid principal, With no related allowance recorded	1,144	6,325	1,561
Average recorded Investment, With no related allowance recorded	2,013	3,210	2,221
Interest income Recognized, With no related allowance recorded	6	8	40
Recorded investment, With an allowance recorded	427	1,304	430
Unpaid principal, With an allowance recorded	440	1,393	440
Related allowance, With an allowance recorded	106	474	110
Average recorded Investment, With an allowance recorded	1,076	1,514	1,077
Interest income Recognized, With an allowance recorded	1	4	9
Consumer [Member] | Home Equity Lines of Credit [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	220	539	735
Unpaid principal, With no related allowance recorded	233	597	746
Average recorded Investment, With no related allowance recorded	337	497	594
Interest income Recognized, With no related allowance recorded	1		9
Recorded investment, With an allowance recorded	493	694	551
Unpaid principal, With an allowance recorded	493	694	551
Related allowance, With an allowance recorded	295	231	300
Average recorded Investment, With an allowance recorded	550	650	579
Interest income Recognized, With an allowance recorded	5	7	27
Consumer [Member] | Home Equity Loans [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	743	1,154	598
Unpaid principal, With no related allowance recorded	1,085	1,598	922
Average recorded Investment, With no related allowance recorded	845	1,051	773
Interest income Recognized, With no related allowance recorded	1	3	4
Recorded investment, With an allowance recorded	440	666	485
Unpaid principal, With an allowance recorded	443	696	487
Related allowance, With an allowance recorded	57	248	102
Average recorded Investment, With an allowance recorded	557	670	579
Interest income Recognized, With an allowance recorded	5	5	25
Consumer [Member] | Home Equity Loans [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	58	108	67
Unpaid principal, With no related allowance recorded	67	112	74
Average recorded Investment, With no related allowance recorded	64	89	69
Interest income Recognized, With no related allowance recorded			1
Average recorded Investment, With an allowance recorded	19	19	19
Consumer [Member] | Auto Indirect [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded		1
Unpaid principal, With no related allowance recorded		10
Average recorded Investment, With no related allowance recorded	1	2	1
Consumer [Member] | Other Consumer [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	5	10	15
Unpaid principal, With no related allowance recorded	6	14	29
Average recorded Investment, With no related allowance recorded	11	13	16
Interest income Recognized, With no related allowance recorded			1
Recorded investment, With an allowance recorded	21		18
Unpaid principal, With an allowance recorded	22		19
Related allowance, With an allowance recorded	14		13
Average recorded Investment, With an allowance recorded	11	1	9
Interest income Recognized, With an allowance recorded			2
Consumer [Member] | Other Consumer [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	138	31	3
Unpaid principal, With no related allowance recorded	139	51	4
Average recorded Investment, With no related allowance recorded	86	32	18
Interest income Recognized, With no related allowance recorded	2
Recorded investment, With an allowance recorded	116	258	118
Unpaid principal, With an allowance recorded	116	258	118
Related allowance, With an allowance recorded	16	84	15
Average recorded Investment, With an allowance recorded	175	246	176
Interest income Recognized, With an allowance recorded	1	3	5
Consumer and Industrial [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	1,289	520	762
Unpaid principal, With no related allowance recorded	1,312	635	926
Average recorded Investment, With no related allowance recorded	932	548	669
Interest income Recognized, With no related allowance recorded	7	7	48
Recorded investment, With an allowance recorded	1,783	3,351	3,334
Unpaid principal, With an allowance recorded	1,842	3,376	3,385
Related allowance, With an allowance recorded	811	1,934	1,130
Average recorded Investment, With an allowance recorded	1,938	2,722	2,714
Interest income Recognized, With an allowance recorded	14	34	77
Consumer and Industrial [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Average recorded Investment, With no related allowance recorded	1	1	1
Construction [Member] | Residential [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment, With no related allowance recorded	11		11
Unpaid principal, With no related allowance recorded	16	63	16
Average recorded Investment, With no related allowance recorded	7	2	7
Recorded investment, With an allowance recorded	14
Unpaid principal, With an allowance recorded	14
Related allowance, With an allowance recorded	14
Average recorded Investment, With an allowance recorded	7
Construction [Member] | Commercial [Member] | PNCI Loans [Member]
Financing Receivable, Impaired [Line Items]
Average recorded Investment, With no related allowance recorded	$ 245	$ 245	$ 245

Allowance for Loan Losses - Tro

Allowance for Loan Losses - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)SecurityLoan	Mar. 31, 2016USD ($)SecurityLoan
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	3	5
Pre-mod outstanding principal balance	$ 134	$ 327
Post-mod outstanding principal balance	134	364
Financial impact due to TDR taken as additional provision	$ 105	27
Number that defaulted during the period | SecurityLoan	1
Recorded investment of TDRs that defaulted during the period	$ 124
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	0	0
Mortgage Loans on Real Estate [Member] | Residential [Member]
Financing Receivable, Modifications [Line Items]
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		2
Pre-mod outstanding principal balance		$ 78
Post-mod outstanding principal balance		115
Number that defaulted during the period | SecurityLoan	1
Recorded investment of TDRs that defaulted during the period	$ 124
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
Consumer [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	1	1
Pre-mod outstanding principal balance	$ 20	$ 132
Post-mod outstanding principal balance	20	132
Financial impact due to TDR taken as additional provision		19
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	0	$ 0
Consumer [Member] | Home Equity Loans [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		1
Pre-mod outstanding principal balance		$ 105
Post-mod outstanding principal balance		105
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	0	0
Consumer [Member] | Auto Indirect [Member]
Financing Receivable, Modifications [Line Items]
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	$ 0	0
Consumer [Member] | Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	1
Pre-mod outstanding principal balance	$ 14
Post-mod outstanding principal balance	14
Financial impact due to TDR taken as additional provision	11
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	$ 0	$ 0
Consumer and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	1	1
Pre-mod outstanding principal balance	$ 100	$ 12
Post-mod outstanding principal balance	100	12
Financial impact due to TDR taken as additional provision	94	8
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	0	0
Construction [Member] | Residential [Member]
Financing Receivable, Modifications [Line Items]
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions	0	0
Construction [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Financial impact due to 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, 2017USD ($)Assets	Mar. 31, 2016USD ($)Assets
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net	$ 3,986	$ 5,369
Additions/transfers from loans	85	416
Dispositions/sales	(608)	(1,325)
Valuation adjustments	66	11
Ending balance, net	3,529	4,471
Ending valuation allowance	$ (300)	$ 572
Ending number of foreclosed assets | Assets	12	21
Proceeds from sale of foreclosed assets	$ 726	$ 1,417
Gain on sale of foreclosed assets	118	92
Noncovered [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net	3,763	5,369
Additions/transfers from loans	85	416
Dispositions/sales	(385)	(1,325)
Valuation adjustments	66	11
Ending balance, net	3,529	4,471
Ending valuation allowance	$ (300)	$ 572
Ending number of foreclosed assets | Assets	12	21
Proceeds from sale of foreclosed assets	$ 510	$ 1,417
Gain on sale of foreclosed assets	125	$ 92
Covered [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Beginning balance, net	223
Dispositions/sales	(223)
Proceeds from sale of foreclosed assets	216
Gain on sale of foreclosed assets	$ (7)

Foreclosed Assets - Additional

Foreclosed Assets - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Schedule Of Foreclosed Assets Activity [Line Items]
Foreclosed assets	$ 3,529,000	$ 3,986,000	$ 4,471,000	$ 5,369,000
Residential Real Estate [Member]
Schedule Of Foreclosed Assets Activity [Line Items]
Foreclosed assets	1,207,000
Formal foreclosure proceedings	$ 160,000

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment, Net, by Type [Abstract]
Land & land improvements	$ 9,522	$ 9,522
Buildings	43,600	42,345
Furniture and equipment	33,077	31,428
Premises and equipment, gross	86,199	83,295
Less: Accumulated depreciation	(38,719)	(37,412)
Premises and equipment less depreciation, gross	47,480	45,883
Construction in progress	2,028	2,523
Total premises and equipment	$ 49,508	$ 48,406

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense for premises and equipment	$ 1,311,000	$ 1,271,000

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, 2017USD ($)PoliciesEmployeesCompany	Mar. 31, 2016USD ($)PoliciesEmployeesCompany
Increase (Decrease) in Insurance Liabilities [Abstract]
Beginning balance	$ 95,912	$ 94,560
Increase in cash value of life insurance	685	696
Gain on death benefit	107
Insurance proceeds receivable reclassified to other assets	(921)
Ending balance	95,783	95,256
End of period death benefit	$ 164,574	$ 166,216
Number of policies owned | Policies	183	187
Insurance companies used | Company	14	14
Current and former employees and directors covered | Employees	58	59

Cash Value of Life Insurance 89

Cash Value of Life Insurance - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017PoliciesCompany	Mar. 31, 2016Company
Insurance [Abstract]
Number of life insurance policies owned by the Company	183
Insurance companies used | Company	14	14
Policies covering current and former employees and directors	58

Goodwill and Other Intangible90

Goodwill and Other Intangible Assets - Summary of Goodwill Intangible (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Ending Balance	$ 64,311
Goodwill, Additions	0
Goodwill, Reductions	0
Goodwill, Beginning Balance	$ 64,311

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, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Core deposit intangibles, Beginning balance	$ 10,120
Core deposit intangibles, Reductions/Amortization	0
Core deposit intangibles, Additions	0
Core deposit intangibles, Ending balance	10,120
Accumulated amortization, Beginning balance	(3,557)
Accumulated amortization, Reductions/Amortization	(359)
Accumulated amortization, Additions	0
Accumulated amortization, Ending balance	(3,916)
Core deposit intangibles, net, Beginning balance	6,563
Core deposit intangibles, net, Reductions/Amortization	(359)
Core deposit intangibles, net, Additions	0
Core deposit intangibles, net, Ending balance	$ 6,204

Goodwill and Other Intangible92

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

Goodwill and Other Intangible93

Goodwill and Other Intangible Assets - Remaining Estimated Core Deposit Intangible Amortization (Detail) - Core Deposit Intangibles [Member] $ in Thousands	Dec. 31, 2016USD ($)
Finite-Lived Intangible Assets [Line Items]
2,017	$ 1,030
2,018	1,324
2,019	1,228
2,020	1,228
2,021	969
Thereafter	$ 425

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, 2017	Mar. 31, 2016	Dec. 31, 2016
Servicing Assets at Fair Value [Line Items]
Contractually specified servicing fees, late fees and ancillary fees earned	$ 521	$ 517
Weighted-average prepayment speed (CPR)	8.30%	11.60%
Weighted-average discount rate	14.00%	10.00%
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Balance at beginning of period	$ 6,595	$ 7,618	$ 7,618
Additions	278	220
Change in fair value	(13)	(698)
Balance at end of period	6,860	7,140	6,595
Loans [Member]
Servicing Assets at Fair Value [Line Items]
Balance at beginning of period	816,623	817,917	817,917
Balance at end of period	$ 822,506	$ 813,800	$ 816,623

Indemnification Asset - Summary

Indemnification Asset - Summary of Activity in Balance of Indemnification Asset (Liability) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
FDIC Indemnification Asset [Roll Forward]
Beginning balance	$ (744)	$ (521)
Effect of actual and estimated future covered losses and recoveries	(191)	(111)
Reimbursable (revenue) expenses incurred	(32)	(4)
Payments made to (received from) FDIC	72	29
Ending balance	(895)	(607)
Amount of indemnification asset (liability) recorded in other assets	(179)	11
Amount of indemnification asset (liability) recorded in other liabilities	(716)	(618)
Ending balance	$ (895)	$ (607)

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax asset, net	$ 35,764	$ 36,199
Prepaid expense	4,219	3,045
Software	1,805	2,039
Advanced compensation	220	249
Capital Trusts	1,733	1,702
Investment in Low Housing Tax Credit Funds	18,184	18,465
Life insurance proceeds receivable	2,759	2,120
Tax refund receivable		6,460
Premises held for sale		2,896
Miscellaneous other assets	1,970	1,568
Total other assets	$ 66,654	$ 74,743

Deposits - Summary of Balances

Deposits - Summary of Balances of Deposits (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Noninterest-bearing demand	$ 1,254,431	$ 1,275,745
Interest-bearing demand	947,006	887,625
Savings	1,370,015	1,397,036
Time certificates, over $250,000	76,372	75,184
Other time certificates	251,060	259,970
Total deposits	$ 3,898,884	$ 3,895,560

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Schedule Of Deposits [Line Items]
Overdrawn deposit balances classified as consumer loans	$ 985,000	$ 1,191,000
California [Member]
Schedule Of Deposits [Line Items]
Certificate of deposits, included in time certificates $250,000 and over	$ 50,000,000	$ 50,000,000

Reserve for Unfunded Commitme99

Reserve for Unfunded Commitments - Summary of Activity in Reserve for Unfunded Commitments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 2,719	$ 2,475
Provision for losses - Unfunded commitments	15	0
Balance at end of period	$ 2,734	$ 2,475

Other Liabilities - Components

Other Liabilities - Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Deferred compensation	$ 6,683	$ 6,525
Pension liability	26,868	26,645
Joint beneficiary agreements	3,069	3,007
Low income housing tax credit fund commitments	14,380	15,176
Accrued salaries and benefits expense	6,742	5,704
Loan escrow and servicing payable	1,140	2,146
Litigation contingency	1,450	1,450
Taxes payable	546
Miscellaneous other liabilities	6,060	6,711
Total other liabilities	$ 66,938	$ 67,364

Other Borrowings - Summary of B

Other Borrowings - Summary of Balances of Other Borrowings (Detail) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Other collateralized borrowings, fixed rate, as of March 31, 2017 of 0.05%, payable on April 3, 2017	$ 15,197,000	$ 17,493,000
Total other borrowings	15,197,000	17,493,000
0.05% Fixed Rate Collateralized Borrowings [Member]
Debt Instrument [Line Items]
Other collateralized borrowings, fixed rate, as of March 31, 2017 of 0.05%, payable on April 3, 2017	$ 15,197,000	$ 17,493,000

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, 2017
Debt Instrument [Line Items]
Other collateralized borrowings, fixed rate	0.05%
Other collateralized borrowings, maturity date	Apr. 3, 2017

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Security repurchase agreement	$ 0	$ 0
Other collateralized borrowings	15,197,000	$ 17,493,000
Repurchase investment securities sold and pledged as collateral under securities repurchase agreement	36,421,000
FHLB collateral line of credit, maximum borrowings capacity	1,302,432,000
FHLB collateral line of credit, outstanding balance	0
FHLB collateral line of credit, remaining borrowing capacity	1,302,432,000
Loans designated as potential collateral under collateralized line of credit with FHLB	72,323,000
Investment securities designated as potential collateral under collateral line of credit	1,881,915,000
Collateralized line of credit with San Francisco Federal Reserve Bank, maximum borrowings capacity	127,355,000
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	127,355,000
Investment securities designated as potential collateral under collateral line of credit with San Francisco Federal Reserve Bank	20,000
Loans designated as potential collateral under collateral line of credit with San Francisco Federal Reserve Bank	220,287,000
Unused correspondent banking lines of credit from commercial banks for federal funds	$ 20,000,000

Junior Subordinated Debt - Addi

Junior Subordinated Debt - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017USD ($)TrustLocation	Dec. 31, 2016USD ($)	Oct. 03, 2014USD ($)
Class of Stock [Line Items]
Number of subsidiary business trusts | Trust	5
Trust preferred securities amount	$ 62,900,000
Subordinated debenture, recorded fair value	$ 56,713,000	$ 56,667,000
Number of locations organized | Location	2
Maximum [Member]
Class of Stock [Line Items]
Consecutive payments of interest on debenture defer Period	5 years
Prior to Amendment [Member]
Class of Stock [Line Items]
Subordinated debenture, recorded fair value	$ 46,000
Post Amendment [Member]
Class of Stock [Line Items]
Subordinated debenture, recorded fair value	$ 56,713,000
North Valley Bancorp [Member]
Class of Stock [Line Items]
Number of locations acquired | Location	3
Acquisition, completion date	Oct. 3, 2014
North Valley Trust II [Member]
Class of Stock [Line Items]
Subordinated debenture, recorded fair value	$ 5,105,000	5,095,000	$ 5,006,000
North Valley Trust III [Member]
Class of Stock [Line Items]
Subordinated debenture, recorded fair value	4,013,000	4,005,000	3,918,000
North Valley Trust IV [Member]
Class of Stock [Line Items]
Subordinated debenture, recorded fair value	$ 6,357,000	$ 6,329,000	$ 6,063,000

Junior Subordinated Debt - Summ

Junior Subordinated Debt - Summary of Terms and Recorded Balance of Subordinated Debenture (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Oct. 03, 2014
Subordinated Borrowing [Line Items]
Subordinated debenture, Face Value	$ 62,889,000
Subordinated debenture, Recorded Book Value	$ 56,713,000	$ 56,667,000
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, Current Coupon Rate	4.07%
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, Current Coupon Rate	3.59%
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
Subordinated debenture, Current Coupon Rate	4.29%
Subordinated debenture, Recorded Book Value	$ 5,105,000	5,095,000	$ 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
Subordinated debenture, Current Coupon Rate	3.84%
Subordinated debenture, Recorded Book Value	$ 4,013,000	4,005,000	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
Subordinated debenture, Current Coupon Rate	2.46%
Subordinated debenture, Recorded Book Value	$ 6,357,000	$ 6,329,000	$ 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, 2017USD ($)site$ / sharesshares	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)shares	Aug. 21, 2007shares
Conversion of Stock [Line Items]
Reserves to satisfy Federal regulatory requirements	$ 81,740,000		$ 78,183,000
Number of sites leased under non-cancelable operating leases | site	44
Rent expense under operating leases	$ 1,047,000	$ 981,000
Rent expense offset by rent income	$ 13,000	$ 58,000
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.
Cost of settlement	$ 1,450,000
Class B common stock of Visa Inc. | shares	22,873,305		22,867,802	15,814,662
Conversion ratio	1.648265
Maximum [Member]
Conversion of Stock [Line Items]
Settlement amount	$ 1,900,000
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	$ 88.87
Value of unredeemed Class A equivalent shares	$ 1,962,000

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	Mar. 31, 2017USD ($)
Leases [Abstract]
2,017	$ 3,320
2,018	2,523
2,019	1,924
2,020	1,325
2,021	963
Thereafter	1,696
Future minimum lease payments	$ 11,751

Commitments and Contingencie108

Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
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	88,301	97,399
RE Mortgage [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	38,589	42,184
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	11,639	12,763
Commercial [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	228,892	220,836
Consumer Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	412,821	406,855
Deposit Account Overdraft Privilege [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 99,029	$ 98,583

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	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	22,873,305		22,867,802		15,814,662
Repurchased shares outstanding	166,600
Market value of common stock	$ 604,000
Maximum [Member]
Class of Stock [Line Items]
Cash dividend payable by bank			$ 82,615,000
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares outstanding	22,873,305	22,785,173	22,867,802	22,775,173
Company's common stock in lieu of cash to exercise options to purchase shares	16,251	0
Market value of common stock	$ 604,000	$ 0
Tri Counties Bank [Member]
Class of Stock [Line Items]
Cash dividends received	$ 4,042,000	$ 3,680,000

Stock Options and Other Equi110

Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options under the plan	570,800	592,250
Options currently not exercisable yet expected to vest	71,600
Weighted-average remaining contractual term	1 year
Pre-tax compensation costs expected to recognize	$ 280,000
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	69,167	68,450
Weighted-average remaining contractual term	1 year 2 months 12 days
Pre-tax compensation costs	$ 1,116,000
Number of units released	304
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	47,426	47,426
Weighted-average remaining contractual term	1 year 3 months 18 days
Pre-tax compensation costs	$ 476,000
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	71,139
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	475,900
Options available for grant under the plan	635,220
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	116,593
2001 Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options under the plan	94,900
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, 2017$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Number of Shares, beginning balance | shares	592,250
Options granted, Number of Shares | shares	0
Options exercised, Number of Shares | shares	(21,450)
Options forfeited, Number of Shares | shares	0
Options outstanding, Number of Shares, ending balance | shares	570,800
Options outstanding, Weighted Average Exercise Price, beginning balance	$ 17.12
Options granted, Weighted Average Exercise Price	0
Options exercised, Weighted Average Exercise Price	20.30
Options forfeited, Weighted Average Exercise Price	0
Options outstanding, Weighted Average Exercise Price, ending balance	17
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	14.54
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	23.21
Options granted, Option Price per Share	0
Options exercised, Option Price per Share	22.54
Options forfeited, Option Price per Share	0
Options outstanding, Option Price per Share, ending balance	$ 23.21

Stock Options and Other Equi112

Stock Options and Other Equity-Based Incentive Instruments - Summary of Options Outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	570,800	592,250
Weighted average exercise price	$ 17	$ 17.12
Intrinsic value (in thousands)	$ 10,576
Weighted average remaining contractual term (yrs.)	4 years 2 months 12 days
Currently Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	499,200
Weighted average exercise price	$ 16.77
Intrinsic value (in thousands)	$ 9,367
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	71,600
Weighted average exercise price	$ 18.64
Intrinsic value (in thousands)	$ 1,209
Weighted average remaining contractual term (yrs.)	6 years

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, 2017$ / 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	47,426
RSUs forfeited/expired, Number of RSUs	0
RSUs outstanding, Number of RSUs, ending balance	47,426
Service Condition Vesting RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of RSUs, beginning balance	68,450
RSUs granted, Number of RSUs	730
RSUs added through dividend credits, Number of RSUs	291
RSUs released, Number of RSUs	(304)
RSUs forfeited/expired, Number of RSUs	0
RSUs outstanding, Number of RSUs, ending balance	69,167
RSUs granted, Weighted Average Fair Value on Date of Grant | $ / shares	$ 36.47

Noninterest Income and Expen114

Noninterest Income and Expense - Components of Other Noninterest Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Income Statement [Abstract]
Service charges on deposit accounts	$ 3,619				$ 3,365
ATM and interchange fees	4,015				3,393
Other service fees	765				728
Mortgage banking service fees	521				517
Change in value of mortgage servicing rights	(13)				(698)
Total service charges and fees	8,907				7,305
Gain on sale of loans	910				803
Commissions on sale of non-deposit investment products	607				532
Increase in cash value of life insurance	685				696
Change in indemnification asset	(221)				(115)
Gain on sale of foreclosed assets	118				92
Sale of customer checks	104				119
Lease brokerage income	206				195
Loss on disposal of fixed assets					(31)
Life insurance proceeds in excess of cash value	107
Other	280				194
Total other noninterest income	2,796				2,485
Total noninterest income	$ 11,703	$ 12,462	$ 11,066	$ 11,245	$ 9,790

Noninterest Income and Expen115

Noninterest Income and Expense - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Mortgage loan servicing fees, net of change in fair value of mortgage loan servicing rights	$ 508,000	$ (181,000)

Noninterest Income and Expen116

Noninterest Income and Expense - Components of Noninterest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Schedule Of Other Noninterest Income And Expense [Line Items]
Base salaries, net of deferred loan origination costs	$ 13,390				$ 12,708
Incentive compensation	2,198				1,739
Benefits and other compensation costs	5,305				4,818
Total salaries and benefits expense	20,893				19,265
Occupancy	2,692				2,308
Equipment	1,723				1,386
Data processing and software	2,396				1,843
ATM and POS network charges	853				1,229
Telecommunications	643				685
Postage	404				463
Courier service	254				271
Advertising	967				895
Assessments	405				632
Operational losses	435				164
Professional fees	766				809
Foreclosed assets expense	38				46
Reversal of foreclosed asset losses	(66)				(11)
Reserve for unfunded commitments	15				0
Intangible amortization	359				299
Merger and acquisition expense					622
Other miscellaneous expense	3,045				2,845
Total other noninterest expense	14,929				14,486
Total noninterest expense	$ 35,822	$ 36,563	$ 37,416	$ 38,267	33,751
North Valley Bancorp [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Base salaries (outside temporary help)					187
Professional fees					180
Advertising and marketing					114
Merger and acquisition expense					622
Other miscellaneous expense					$ 141

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Tax Rate and Statutory Federal Income Tax Rate (Detail)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	35.00%	35.00%
State income taxes, net of federal tax benefit	6.90%	6.30%
Tax-exempt interest on municipal obligations	(1.90%)	(1.80%)
Increase in cash value of insurance policies	(1.40%)	(1.40%)
Tax credits	(0.40%)
Equity compensation	(0.50%)
Other	0.10%
Effective Tax Rate	37.80%	38.10%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 12,079	$ 12,533	$ 12,199	$ 9,405	$ 10,674
Average number of common shares outstanding	22,870				22,783
Effect of dilutive stock options and restricted stock	362				263
Average number of common shares outstanding used to calculate diluted earnings per share	23,232				23,046
Options excluded from diluted earnings per share because the effect of these options was antidilutive					23

Comprehensive Income - Componen

Comprehensive Income - Components of Other Comprehensive Income and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Unrealized holding gains (losses) on available for sale securities before reclassifications	$ 787	$ 6,125
Amounts reclassified out of accumulated other comprehensive income-	0	0
Unrealized holding gains (losses) on available for sale securities after reclassifications	787	6,125
Tax effect	(330)	(2,575)
Unrealized holding gains (losses) on available for sale securities, net of tax	457	3,550
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	(3)
Amortization of actuarial losses	96
Total amounts reclassified out of accumulated other comprehensive income	93
Change in unfunded status of the supplemental retirement plans after reclassifications	0	0
Tax effect	(39)
Change in unfunded status of the supplemental retirement plans, net of tax	54
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)	$ 511	$ 3,550

Comprehensive Income - Compo120

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (7,402)	$ (7,913)
Net Unrealized Loss on Available For Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	(8,083)	(8,870)
Accumulated other comprehensive loss, tax effect	3,399	3,729
Accumulated other comprehensive loss	(4,684)	(5,141)
Unfunded Status of Supplemental Retirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	(4,621)	(4,714)
Accumulated other comprehensive loss, tax effect	1,943	1,982
Accumulated other comprehensive loss	(2,678)	(2,732)
Joint Beneficiary Agreement Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	(40)	(40)
Accumulated other comprehensive loss	$ (40)	$ (40)

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Salaries & benefits expense	$ 20,893,000	$ 19,265,000
Employee service period under ESOP	1 year
Deferred compensation obligations	$ 6,683,000			$ 6,525,000
Earnings credits on deferred balances included in noninterest expense	145,000	126,000
Salary [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution and paid out as benefits under ESOP	$ 525,000	441,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
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	$ 186,000	160,000
Employer's contribution to retirement plan	179,000	293,000
Supplemental Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution to retirement plan	$ 259,000	$ 269,000
Supplemental Retirement Plans [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution to retirement plan			$ 1,067,000

Retirement Plans - Net Periodic

Retirement Plans - Net Periodic Benefit Cost Recognized for Supplemental Retirement Plans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net pension cost included the following components:
Service cost-benefits earned during the period	$ 235	$ 260
Interest cost on projected benefit obligation	249	256
Amortization of net obligation at transition	1
Amortization of prior service cost	(3)	(10)
Recognized net actuarial loss	96	138
Net periodic pension cost	$ 578	$ 644

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, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Beginning balance	$ 2,432	$ 4,201
Advances/new loans	160	730
Removed/payments	(19)	(2,499)
Ending balance	$ 2,573	$ 2,432

Fair Value Measurement - Record

Fair Value Measurement - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value Measurements on Recurring Basis [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 578,579	$ 556,828
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	450,616	429,678
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	118,165	117,617
Marketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,938	2,938
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,938	2,938
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	2,938	2,938
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	568,781	547,295
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	450,616	429,678
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	118,165	117,617
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,860	6,595
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,860	6,595
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	$ 6,860	$ 6,595

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between level 1 to level 2, Assets	$ 0	$ 0
Transfers between level 2 to level 1, Assets	0	0
Transfers between level 1 to level 2, Liabilities	0	0
Transfers between level 2 to level 1, Liabilities	0	0
Transfer into level 3	0	0
Transfer out of level 3	0	0
Carrying value of loans fully charged-off	0
Securities held to maturity	580,137,000	602,536,000
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, 2017	Mar. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 6,595	$ 7,618
Transfers into (out of) Level 3	0	0
Change Included in Earnings	(13)	(698)
Issuances	278	220
Ending Balance	$ 6,860	$ 7,140

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, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	8.30%	11.60%
Discount rate	14.00%	10.00%
Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortgages Servicing Rights, Fair Value	$ 6,860	$ 7,140	$ 6,595	$ 7,618
Minimum [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	14.00%		14.00%
Minimum [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	6.20%		6.90%
Maximum [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	16.00%		16.00%
Maximum [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	18.80%		16.60%
Weighted Average [Member] | Mortgage Servicing Rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	14.00%		14.00%
Weighted Average [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	8.30%		8.80%

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 824		$ 1,107
Fair Value Nonrecurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,352	$ 5,738	3,360
Total Gains/(Losses)	8	(828)	(495)
Fair Value Nonrecurring Basis [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	824	4,355	1,107
Total Gains/(Losses)	30	(828)	(409)
Fair Value Nonrecurring Basis [Member] | Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,528	1,383	2,253
Total Gains/(Losses)	(22)		(86)
Fair Value Nonrecurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,352	5,738	3,360
Fair Value Nonrecurring Basis [Member] | 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	824	4,355	1,107
Fair Value Nonrecurring Basis [Member] | 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	$ 1,528	$ 1,383	$ 2,253

Fair Value Measurement - Qua129

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
	Mar. 31, 2017	Dec. 31, 2016
Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 824	$ 1,107
Foreclosed Assets [Member] | Land & Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		15
Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 657	1,564
Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 674
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	(20.70%)
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	(22.60%)
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	(65.00%)
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	46.30%
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	14.30%
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	62.50%
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	1.90%
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	0.10%
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	(6.90%)
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	0.00%
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	0.00%
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	0.00%

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, 2017	Dec. 31, 2016
Financial assets:
Cash and due from banks	$ 113,569,000	$ 92,197,000
Cash at Federal Reserve and other banks	210,137,000	213,415,000
Securities held to maturity	580,137,000	602,536,000
Financial liabilities:
Other borrowings	15,197,000	17,493,000
Junior subordinated debt	56,713,000	56,667,000
Level 3 [Member]
Financial assets:
Securities held to maturity	0	0
Level 3 [Member] | Overdraft Privilege Commitments [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	99,029,000	98,583,000
Level 3 [Member] | Standby Letters of Credit [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	11,639,000	12,763,000
Level 3 [Member] | Commitments [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	768,603,000	767,274,000
Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans, net	2,758,388,000	2,763,473,000
Financial liabilities:
Junior subordinated debt	51,177,000	49,033,000
Fair Value [Member] | Level 3 [Member] | Overdraft Privilege Commitments [Member]
Off-balance sheet:
Fair value, Off-balance sheet	990,000	986,000
Fair Value [Member] | Level 3 [Member] | Standby Letters of Credit [Member]
Off-balance sheet:
Fair value, Off-balance sheet	116,000	128,000
Fair Value [Member] | Level 3 [Member] | Commitments [Member]
Off-balance sheet:
Fair value, Off-balance sheet	7,686,000	7,673,000
Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	113,569,000	92,197,000
Cash at Federal Reserve and other banks	210,137,000	213,415,000
Fair Value [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	581,816,000	603,203,000
Loans held for sale	1,176,000	2,998,000
Financial liabilities:
Deposits	3,897,029,000	3,893,941,000
Other borrowings	15,197,000	17,493,000
Carrying Amount [Member] | Level 3 [Member]
Financial assets:
Loans, net	2,730,175,000	2,727,090,000
Financial liabilities:
Junior subordinated debt	56,713,000	56,667,000
Carrying Amount [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	113,569,000	92,197,000
Cash at Federal Reserve and other banks	210,137,000	213,415,000
Carrying Amount [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	580,137,000	602,536,000
Restricted equity securities	16,956,000	16,956,000
Loans held for sale	1,176,000	2,998,000
Financial liabilities:
Deposits	3,898,884,000	3,895,560,000
Other borrowings	$ 15,197,000	$ 17,493,000

TriCo Bancshares Condensed F131

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and Cash equivalents	$ 323,706	$ 305,612	$ 388,878	$ 303,461
Other assets	66,654	74,743
Total assets	4,527,954	4,517,968
Liabilities and shareholders' equity
Other liabilities	66,938	67,364
Junior subordinated debt	56,713	56,667
Total liabilities	4,041,236	4,040,621
Shareholders' equity:
Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,873,305 and 22,867,802 shares, respectively	253,456	252,820
Retained earnings	240,664	232,440
Accumulated other comprehensive loss, net	(7,402)	(7,913)
Total shareholders' equity	486,718	477,347	463,436	452,116
Total liabilities and shareholders' equity	4,527,954	4,517,968
Parent [Member]
Assets
Cash and Cash equivalents	2,840	2,802	$ 2,686	$ 2,565
Investment in Tri Counties Bank	539,273	529,907
Other assets	1,738	1,711
Total assets	543,851	534,420
Liabilities and shareholders' equity
Other liabilities	420	406
Junior subordinated debt	56,713	56,667
Total liabilities	57,133	57,073
Shareholders' equity:
Common stock, no par value: authorized 50,000,000 shares; issued and outstanding 22,873,305 and 22,867,802 shares, respectively	253,456	252,820
Retained earnings	240,664	232,440
Accumulated other comprehensive loss, net	(7,402)	(7,913)
Total shareholders' equity	486,718	477,347
Total liabilities and shareholders' equity	$ 543,851	$ 534,420

TriCo Bancshares Condensed F132

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares	Mar. 31, 2017	Dec. 31, 2016	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	22,873,305	22,867,802
Common stock, shares outstanding	22,873,305	22,867,802	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	22,873,305	22,867,802
Common stock, shares outstanding	22,873,305	22,867,802

TriCo Bancshares Condensed F133

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Interest expense	$ (1,491)	$ (1,460)	$ (1,439)	$ (1,430)	$ (1,392)
Income before income taxes	19,431	20,487	19,893	14,911	17,232
Equity in net income of Tri Counties Bank:
Income tax benefit	(7,352)	(7,954)	(7,694)	(5,506)	(6,558)
Net income	12,079	$ 12,533	$ 12,199	$ 9,405	10,674
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Interest expense	595				535
Administration expense	159				149
Income before income taxes	(754)				(684)
Equity in net income of Tri Counties Bank:
Distributed	4,042				3,680
Under distributed	8,474				7,390
Income tax benefit	317				288
Net income	$ 12,079				$ 10,674

TriCo Bancshares Condensed F134

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net income	$ 12,079	$ 12,533	$ 12,199	$ 9,405	$ 10,674
Other comprehensive loss, net of tax:
Increase (decrease) in unrealized gains on available for sale securities arising during the period	457				3,550
Change in minimum pension liability	54
Other comprehensive loss	511				3,550
Comprehensive income	12,590				14,224
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	12,079				10,674
Other comprehensive loss, net of tax:
Increase (decrease) in unrealized gains on available for sale securities arising during the period	457				3,550
Change in minimum pension liability	54
Other comprehensive loss	511				3,550
Comprehensive income	$ 12,590				$ 14,224

TriCo Bancshares Condensed F135

TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Operating activities:
Net income	$ 12,079	$ 12,533	$ 12,199	$ 9,405	$ 10,674
Adjustments to reconcile net income to net cash provided by operating activities:
Equity compensation vesting expense	381				331
Net cash from operating activities	19,444				4,100
Financing activities:
Repurchase of common stock	(169)
Cash dividends paid - common	(3,431)				(3,418)
Net cash used by financing activities	(2,572)				(4,349)
Net change in cash and cash equivalents	18,094				85,417
Cash and cash equivalents and beginning of year	305,612			388,878	303,461
Cash and cash equivalents at end of year	323,706	305,612			388,878
Parent [Member]
Operating activities:
Net income	12,079				10,674
Adjustments to reconcile net income to net cash provided by operating activities:
Under distributed equity in earnings of Tri Counties Bank	(8,474)				(7,390)
Equity compensation vesting expense	381				331
Stock option excess tax benefits					(10)
Net change in other assets and liabilities	(348)				(249)
Net cash from operating activities	3,638				3,356
Financing activities:
Stock option excess tax benefits					10
Issuance of common stock through option exercise					173
Repurchase of common stock	(169)
Cash dividends paid - common	(3,431)				(3,418)
Net cash used by financing activities	(3,600)				(3,235)
Net change in cash and cash equivalents	38				121
Cash and cash equivalents and beginning of year	2,802			$ 2,686	2,565
Cash and cash equivalents at end of year	$ 2,840	$ 2,802			$ 2,686

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	Dec. 31, 2019	Mar. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Increase in risk-based capital ratios		0.625%
Forecast [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements	10.50%
Minimum capital level requirements, Tier 1 capital ratio	8.50%
Forecast [Member] | Common Stock [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements, Tier 1 capital ratio	7.00%
Basel III Phase-in Schedule [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital level requirements		1.25%	0.625%

Regulatory Matters - Actual and

Regulatory Matters - Actual and Required Capital Ratios of Bank (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	1.25%	0.625%
Parent [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 509,690	$ 503,283
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	475,939	468,061
Tier 1 Capital (to Average Assets), Actual, Amount	$ 475,939	$ 468,061
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.86%	14.65%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.87%	13.62%
Tier 1 Capital (to Average Assets), Actual, Ratio	10.77%	10.62%
Parent [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 317,437	$ 296,336
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	248,802	227,620
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 176,753	$ 176,346
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	9.25%	8.625%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.25%	6.625%
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	$ 360,237	$ 360,756
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	291,620	292,041
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 176,753	$ 176,346
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	$ 421,698	$ 414,632
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	12.29%	12.07%
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	$ 197,325	$ 176,084
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	5.75%	5.125%
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	$ 240,158	$ 240,504
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	$ 507,235	$ 500,876
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	473,484	465,654
Tier 1 Capital (to Average Assets), Actual, Amount	$ 473,484	$ 465,654
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.79%	14.59%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.81%	13.56%
Tier 1 Capital (to Average Assets), Actual, Ratio	10.72%	10.56%
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 342,909	$ 343,407
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	274,327	274,725
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 220,936	$ 220,426
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	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%
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
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	$ 317,276	$ 296,188
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	248,676	227,507
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 176,749	$ 176,341
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	9.25%	8.625%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.25%	6.625%
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	$ 360,054	$ 360,577
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	291,473	291,896
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 176,749	$ 176,341
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	$ 473,484	$ 465,654
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.81%	13.56%
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 222,891	$ 223,214
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	$ 197,225	$ 175,996
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	5.75%	5.125%
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	$ 240,036	$ 240,385
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.00%	7.00%

Summary of Quarterly Results138

Summary of Quarterly Results of Operations (Unaudited) - Result of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Loans:
Discount accretion PCI - cash basis	$ 112	$ 483	$ 777	$ 426	$ 269
Discount accretion PCI - other	631	658	569	415	(45)
Discount accretion PNCI	798	637	883	1,459	868
All other loan interest income	33,373	34,463	33,540	32,038	33,646
Total loan interest income	34,914	36,241	35,769	34,338	34,738
Debt securities, dividends and interest bearing cash at Banks (not FTE)	8,570	8,374	7,940	8,252	8,056
Total interest and dividend income	43,484	44,615	43,709	42,590	42,794
Interest expense	1,491	1,460	1,439	1,430	1,392
Net interest income	41,993	43,155	42,270	41,160	41,402
(Benefit from reversal of) provision for loan losses	(1,557)	(1,433)	(3,973)	(773)	209
Net interest income after provision for loan losses	43,550	44,588	46,243	41,933	41,193
Noninterest income	11,703	12,462	11,066	11,245	9,790
Noninterest expense	35,822	36,563	37,416	38,267	33,751
Income before income taxes	19,431	20,487	19,893	14,911	17,232
Income tax expense	7,352	7,954	7,694	5,506	6,558
Net income	$ 12,079	$ 12,533	$ 12,199	$ 9,405	$ 10,674
Per common share:
Net income (diluted)	$ 0.52	$ 0.54	$ 0.53	$ 0.41	$ 0.46
Dividends	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15