Horizon Bancorp (HBNC) 10-K 29 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Feb. 29, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	HBNC
Entity Registrant Name	HORIZON BANCORP /IN/
Entity Central Index Key	706,129
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		11,939,887
Entity Public Float			$ 208.6

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 48,650	$ 43,476
Investment securities, available for sale	444,982	323,764
Investment securities, held to maturity (fair value of $193,703 and $169,904)	187,629	165,767
Loans held for sale	7,917	6,143
Loans, net of allowance for loan losses of $14,534 and $16,501	1,734,597	1,362,053
Premises and equipment, net	60,798	52,461
Federal Reserve and Federal Home Loan Bank stock	13,823	11,348
Goodwill	49,600	28,176
Other intangible assets	7,371	3,965
Interest receivable	10,535	8,246
Cash value of life insurance	54,504	39,382
Other assets	31,995	32,141
Total assets	2,652,401	2,076,922
Liabilities
Non-interest bearing	335,955	267,667
Interest bearing	1,544,198	1,214,652
Total deposits	1,880,153	1,482,319
Borrowings	449,347	351,198
Subordinated debentures	32,797	32,642
Interest payable	507	497
Other liabilities	22,765	15,852
Total liabilities	$ 2,385,569	$ 1,882,508
Commitments and contingent liabilities
Stockholders' Equity
Common stock, no par value Authorized, 22,500,000 shares Issued, 11,995,324 and 9,278,916 shares Outstanding, 11,939,887 and 9,213,036 shares	$ 0	$ 0
Additional paid-in capital	106,370	45,916
Retained earnings	148,685	134,477
Accumulated other comprehensive income (loss)	(723)	1,521
Total stockholders' equity	266,832	194,414
Total liabilities and stockholders' equity	2,652,401	2,076,922
Series B Preferred Stock [Member]
Stockholders' Equity
Preferred stock, Authorized, 1,000,000 shares Series B shares $.01 par value, $1,000 liquidation value Issued 12,500 shares	$ 12,500	$ 12,500

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investment securities, held to maturity fair value	$ 193,703	$ 169,904
Allowance for loan losses	$ 14,534	$ 16,501
Common stock, par value
Common stock, shares authorized	22,500,000	22,500,000
Common stock, shares issued	11,995,324	9,278,916
Common stock, shares outstanding	11,939,887	9,213,036
Series B Preferred Stock [Member]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation value	$ 1,000	$ 1,000
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	12,500	12,500

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income
Loans receivable	$ 75,373	$ 62,435	$ 62,229
Investment securities
Taxable	8,721	9,344	8,441
Tax exempt	4,494	4,426	4,216
Total interest income	88,588	76,205	74,886
Interest Expense
Deposits	5,559	5,257	5,672
Borrowed funds	6,286	5,956	5,821
Subordinated debentures	2,009	2,009	2,010
Total interest expense	13,854	13,222	13,503
Net Interest Income	74,734	62,983	61,383
Provision for loan losses	3,162	3,058	1,920
Net Interest Income after Provision for Loan Losses	71,572	59,925	59,463
Non-interest Income
Service charges on deposit accounts	4,807	4,085	3,989
Wire transfer fees	633	557	697
Interchange fees	5,591	4,649	4,056
Fiduciary activities	5,637	4,738	4,337
Gain on sale of investment securities (includes $189, $988 and $374 for the years ended December 31, 2015, 2014 and 2013 related to accumulated other comprehensive earnings reclassifications)	189	988	374
Gain on sale of mortgage loans	10,055	8,395	8,794
Mortgage servicing income net of impairment	993	805	1,521
Increase in cash value of bank owned life insurance	1,249	1,047	1,035
Death benefit on bank owned life insurance	145
Other income	1,103	1,013	1,103
Total non-interest income	30,402	26,277	25,906
Non-interest Expense
Salaries and employee benefits	37,712	32,682	31,032
Net occupancy expenses	6,400	5,607	4,984
Data processing	4,251	3,663	3,045
Professional fees	2,070	1,731	1,668
Outside services and consultants	5,735	3,250	2,412
Loan expense	5,379	4,770	4,668
FDIC insurance expense	1,499	1,175	1,089
Other losses	432	(70)	807
Other expense	10,715	9,138	8,740
Total non-interest expense	74,193	61,946	58,445
Income Before Income Tax	27,781	24,256	26,924
Income tax expense (includes $66, $346 and $131 for the years ended December 31, 2015, 2014 and 2013 related to income tax expense from reclassification items)	7,232	6,155	7,048
Net Income	20,549	18,101	19,876
Preferred stock dividend	(125)	(133)	(370)
Net Income Available to Common Shareholders	$ 20,424	$ 17,968	$ 19,506
Basic Earnings Per Share	$ 1.94	$ 1.98	$ 2.26
Diluted Earnings Per Share	$ 1.89	$ 1.90	$ 2.17

Consolidated Statements of Inc5

Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Accumulated other comprehensive earnings reclassifications	$ 189	$ 988	$ 374
Income tax expense from reclassification	$ 66	$ 346	$ 131

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 20,549	$ 18,101	$ 19,876
Change in fair value of derivative instruments:
Change in fair value of derivative instruments for the period	195	(511)	2,668
Income tax effect	(68)	179	(934)
Changes from derivative instruments	127	(332)	1,734
Change in securities:
Unrealized appreciation (depreciation) for the period on AFS securities	(2,910)	4,841	(18,956)
Unrealized depreciation for the period on held-to-maturity securities	(549)	1,658
Reclassification adjustment for securities gains realized in income	(189)	(988)	(374)
Income tax effect	1,277	(1,929)	6,766
Unrealized gains (losses) on securities	(2,371)	3,582	(12,564)
Other Comprehensive Income (Loss), Net of Tax	(2,244)	3,250	(10,830)
Comprehensive Income	$ 18,305	$ 21,351	$ 9,046

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balances at Dec. 31, 2012	$ 158,968	$ 12,500	$ 31,965	$ 105,402	$ 9,101
Net income	19,876			19,876
Other comprehensive income (loss), net of tax	(10,830)				(10,830)
Amortization of unearned compensation	288		288
Exercise of stock options	195		195
Stock option expense	48		48
Cash dividends on preferred stock	(370)			(370)
Cash dividends on common stock	(3,655)			(3,655)
Ending Balances at Dec. 31, 2013	164,520	12,500	32,496	121,253	(1,729)
Net income	18,101			18,101
Other comprehensive income (loss), net of tax	3,250				3,250
Amortization of unearned compensation	363		363
Exercise of stock options	165		165
Stock option expense	203		203
Stock issued from acquisition	12,689		12,689
Cash dividends on preferred stock	(133)			(133)
Cash dividends on common stock	(4,744)			(4,744)
Ending Balances at Dec. 31, 2014	194,414	12,500	45,916	134,477	1,521
Net income	20,549			20,549
Other comprehensive income (loss), net of tax	(2,244)				(2,244)
Amortization of unearned compensation	355		355
Exercise of stock options	403		403
Exercise of stock warrants	3,751		3,751
Tax benefit related to stock options	151		151
Stock option expense	288		288
Stock issued from acquisition	55,506		55,506
Cash dividends on preferred stock	(125)			(125)
Cash dividends on common stock	(6,216)			(6,216)
Ending Balances at Dec. 31, 2015	$ 266,832	$ 12,500	$ 106,370	$ 148,685	$ (723)

Consolidated Statements of Sto8

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash dividends on preferred stock, rate	1.00%	1.06%	2.96%
Cash dividends on common stock, per share	$ 0.58	$ 0.51	$ 0.42
Retained Earnings [Member]
Cash dividends on preferred stock, rate	1.00%	1.06%	2.96%
Cash dividends on common stock, per share	$ 0.58	$ 0.51	$ 0.42

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Operating Activities
Net income	$ 20,549	$ 18,101	$ 19,876
Items not requiring (providing) cash
Provision for loan losses	3,162	3,058	1,920
Depreciation and amortization	4,152	3,779	3,356
Share based compensation	288	203	48
Mortgage servicing rights net (recovery) impairment	59	(51)	(635)
Premium amortization on securities available for sale, net	3,420	2,299	2,861
Gain on sale of investment securities	(189)	(988)	(374)
Gain on sale of mortgage loans	(10,055)	(8,395)	(8,794)
Proceeds from sales of loans	310,700	234,776	365,654
Loans originated for sale	(302,419)	(229,243)	(346,397)
Change in cash value of life insurance	(1,224)	(1,007)	(998)
Gain on sale of other real estate owned	(289)	(186)	(116)
Net change in
Interest receivable	(1,010)	(398)	215
Interest payable	(11)	(50)	(54)
Other assets	8,569	(4,945)	9,905
Other liabilities	(472)	712	498
Net cash provided by operating activities	35,230	17,665	46,965
Investing Activities
Purchases of securities available for sale	(244,195)	(93,375)	(168,886)
Proceeds from sales, maturities, calls, and principal repayments of securities available for sale	121,724	117,533	121,309
Purchases of securities held to maturity	(32,605)	(4,839)	(12,050)
Proceeds from maturities of securities held to maturity	7,155	13,851	2,110
Purchase of Federal Reserve Bank stock			(851)
Proceeds from the sale of FHLB stock	268	4,972
Net change in loans	(156,340)	(190,838)	112,140
Proceeds on the sale of OREO and repossessed assets	3,014	2,726	2,343
Change in premises and equipment, net	(5,622)	(6,255)	(6,318)
Purchase of Mortgage Company		(735)
Net cash used in investing activities	(124,188)	(149,046)	49,797
Net change in
Deposits	46,747	69,780	(2,633)
Borrowings	49,421	78,068	(89,313)
Proceeds from issuance of stock	4,305	165	195
Dividends paid on common shares	(6,216)	(4,744)	(3,655)
Dividends paid on preferred shares	(125)	(133)	(370)
Net cash provided by financing activities	94,132	143,136	(95,776)
Net Change in Cash and Cash Equivalents	5,174	11,755	986
Cash and Cash Equivalents, Beginning of Period	43,476	31,721	30,735
Cash and Cash Equivalents, End of Period	48,650	43,476	31,721
Additional Supplemental Information
Interest paid	13,844	13,230	13,556
Income taxes paid	4,123	2,800	3,100
Transfer of loans to other real estate owned	5,567	3,905	$ 3,284
Transfer of available-for-sale securities to held-to-maturity		167,047
The Company purchased all of the capital stock of Peoples for $78,147 on July 1, 2015 and of Summit for $18,896 on April 3, 2014. In conjunction with the acquisition, liabilities were assumed as follows:
Fair value of assets acquired	485,077	158,585
Cash paid to retire debt		1,029
Less: common stock issued	55,506	12,689
Cash paid for the capital stock	22,641	6,207
Liabilities assumed	406,930	138,660
Summit [Member]
Investing Activities
Acquisition of businesses, net of cash received		$ 7,914
Peoples Bancorp Inc [Member]
Investing Activities
Acquisition of businesses, net of cash received	$ 182,413

Consolidated Statements of Ca10

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	Jul. 01, 2015	Apr. 03, 2014
Summit [Member]
Capital stock purchased		$ 18,896
Peoples Bancorp Inc [Member]
Capital stock purchased	$ 78,147

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Note 1 - Nature of Operations and Summary of Significant Accounting Policies Nature of Business The Bank is a full-service commercial bank offering a broad range of commercial and retail banking and other services incident to banking along with a trust department that offers corporate and individual trust and agency services and investment management services. The Bank maintains 46 full service offices. The Bank has wholly owned direct and indirect subsidiaries: Horizon Investments, Inc. (“Horizon Investments”), Horizon Properties, Inc. (“Horizon Properties”), Horizon Insurance Services, Inc. (“Horizon Insurance”) and Horizon Grantor Trust. Horizon Investments manages the investment portfolio of the Bank. Horizon Properties manages the real estate investment trust. Horizon Insurance is used by the Company’s Wealth Management to sell certain insurance products. Horizon Grantor Trust holds title to certain company owned life insurance policies. Horizon conducts no business except that incident to its ownership of the subsidiaries. Horizon formed Horizon Bancorp Capital Trust II in 2004 (“Trust II”) and Horizon Bancorp Capital Trust III in 2006 (“Trust III”) for the purpose of participating in pooled trust preferred securities offerings. The Company assumed additional debentures as the result of the following acquisitions: Alliance Financial Corporation in 2005, which formed Alliance Financial Statutory Trust I (“Alliance Trust”); American Trust & Savings Bank in 2010, which formed Am Tru Statutory Trust I (“Am Tru Trust”); and Heartland Bancshares, Inc. in 2013, which formed Heartland (IN) Statutory Trust II (“Heartland Trust”). See Note 15 of the Consolidated Financial Statements for further discussion regarding these previously consolidated entities that are now reported separately. The business of Horizon is not seasonal to any material degree. Basis of Reporting Use of Estimates Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, valuation of other real estate owned, goodwill and intangible assets, mortgage servicing rights, other-than-temporary impairments and fair values of financial instruments. Fair Value Measurements As defined in codification, fair value is the price to sell an asset or transfer a liability in an orderly transaction between market participants. It represents an exit price at the measurement date. Market participants are buyers and sellers, who are independent, knowledgeable, and willing and able to transact in the principal (or most advantageous) market for the asset or liability being measured. Current market conditions, including imbalances between supply and demand, are considered in determining fair value. Horizon values its assets and liabilities in the principal market where it sells the particular asset or transfers the liability with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market for the asset or liability (i.e., the market where the asset could be sold or the liability transferred at a price that maximizes the amount to be received for the asset or minimizes the amount to be paid to transfer the liability). In measuring the fair value of an asset, Horizon assumes the highest and best use of the asset by a market participant to maximize the value of the asset, and does not consider the intended use of the asset. When measuring the fair value of a liability, Horizon assumes that the nonperformance risk associated with the liability is the same before and after the transfer. Nonperformance risk is the risk that an obligation will not be satisfied and encompasses not only Horizon’s own credit risk (i.e., the risk that Horizon will fail to meet its obligation), but also other risks such as settlement risk. Horizon considers the effect of its own credit risk on the fair value for any period in which fair value is measured. There are three acceptable valuation techniques that can be used to measure fair value: the market approach, the income approach and the cost approach. Selection of the appropriate technique for valuing a particular asset or liability takes into consideration the exit market, the nature of the asset or liability being valued, and how a market participant would value the same asset or liability. Ultimately, determination of the appropriate valuation method requires significant judgment, and sufficient knowledge and expertise are required to apply the valuation techniques. Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability using one of the three valuation techniques. Inputs can be observable or unobservable. Observable inputs are those assumptions which market participants would use in pricing the particular asset or liability. These inputs are based on market data and are obtained from a source independent of Horizon. Unobservable inputs are assumptions based on Horizon’s own information or estimate of assumptions used by market participants in pricing the asset or liability. Unobservable inputs are based on the best and most current information available on the measurement date. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy which gives the highest ranking to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest ranking to unobservable inputs (Level 3). Fair values for assets or liabilities classified as Level 2 are based on one or a combination of the following factors: (i) quoted prices for similar assets; (ii) observable inputs for the asset or liability, such as interest rates or yield curves; or (iii) inputs derived principally from or corroborated by observable market data. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company considers an input to be significant if it drives 10% or more of the total fair value of a particular asset or liability. Assets and liabilities are considered to be fair valued on a recurring basis if fair value is measured regularly (i.e., daily, weekly, monthly or quarterly). Recurring valuation occurs at a minimum on the measurement date. Assets and liabilities are considered to be fair valued on a nonrecurring basis if the fair value measurement of the instrument does not necessarily result in a change in the amount recorded on the balance sheet. Generally, nonrecurring valuation is the result of the application of other accounting pronouncements which require assets or liabilities to be assessed for impairment or recorded at the lower of cost or fair value. The fair value of assets or liabilities transferred in or out of Level 3 is measured on the transfer date, with any additional changes in fair value subsequent to the transfer considered to be realized or unrealized gains or losses. Investment Securities Available for Sale Investment Securities Held to Maturity Loans Held for Sale Interest and Fees on Loans Concentrations of Credit Risk Mortgage Warehouse Loans The transaction does not qualify as a sale under ASC 860, Transfers and Servicing and therefore is accounted for as a secured borrowing with pledge of collateral pursuant to the agreement with the mortgage company. When the individual loan is sold to the end investor by the mortgage company, the proceeds from the sale of the loan are received by Horizon and used to pay off the loan balance with Horizon along with any accrued interest and any related fees. The remaining balance from the sale is forwarded to the mortgage company. These individual loans typically are sold by the mortgage company within 30 days and are seldom held more than 90 days. Interest income is accrued during this period and collected at the time each loan is sold. Fee income for each loan sold is collected when the loan is sold and no costs are deferred due to the term between each loan funding and related payoff, which is typically less than 30 days. Based on the agreements with each mortgage company, at any time a mortgage company can reacquire from Horizon its outstanding loan balance on an individual mortgage and regain possession of the original note. Horizon also has the option to request that the mortgage company reacquire an individual mortgage. Should this occur, Horizon would return the original note and reassign the assignment of the mortgage to the mortgage company. Also, in the event that the end investor would not be able to honor the sales commitment and the mortgage company would not be able to reacquire its loan on an individual mortgage, Horizon would be able to exercise its rights under the agreement. Allowance for Loan Losses The general allowance is calculated by applying loss factors to pools of outstanding loans. Loss factors are based on historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectability of the portfolio as of the evaluation date. Specific allowances are established in cases where management has identified conditions or circumstances related to a credit that management believes indicate the probability that a loss will be incurred in excess of the amount determined by the application of the formula allowance. The qualitative allowance is based upon management’s evaluation of various conditions, the effects of which are not directly measured in the determination of the general and specific allowances. The evaluation of the inherent loss with respect to these conditions is subject to a higher degree of uncertainty because they are not identified with specific credits. The conditions evaluated in connection with the qualitative allowance may include factors such as local, regional and national economic conditions and forecasts, concentrations of credit and changes in the composition of the portfolio. Loan Impairment Loans are considered impaired if the borrower does not exhibit the ability to pay or the full principal or interest payments are not expected or made in accordance with the original terms of the loan. Impaired loans are measured and carried at the lower of cost or the present value of expected future cash flows discounted at the loan’s effective interest rate, at the loan’s observable market price or at the fair value of the collateral if the loan is collateral dependent. Smaller balance homogenous loans are evaluated for impairment in the aggregate. Such loans include residential first mortgage loans secured by one to four family residences, residential construction loans and automobile, home equity and second mortgages. Commercial loans and mortgage loans secured by other properties are evaluated individually for impairment. Loans Acquired in Business Combinations The expected cash flows of the acquired loan pools in excess of the fair values recorded is referred to as the accretable yield and is recognized in interest income over the remaining estimated lives of the loan pools. The Company continues to evaluate the fair value of the loans including cash flows expected to be collected. Increases in the Company’s cash flow expectation are recognized as increases to the accretable yield while decreases are recognized as impairments through the allowance for loan losses. Premises and Equipment Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock Mortgage Servicing Rights 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. These variables change from quarter to quarter as market conditions and projected interest rates change, and may have an adverse impact on the value of the mortgage servicing right and may result in a reduction to noninterest income. Each class of separately recognized servicing assets subsequently measured using the amortization method are evaluated and measured for impairment. Impairment is determined by stratifying rights into tranches based on predominant characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the carrying amount of the servicing assets for that tranche. The valuation allowance is adjusted to reflect changes in the measurement of impairment after the initial measurement of impairment. Changes in valuation allowances are reported with mortgage servicing income net of impairment on the income statement. Fair value in excess of the carrying amount of servicing assets for that stratum is not recognized. Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Intangible Assets Bank Owned Life Insurance (BOLI) Income Taxes Income Taxes Uncertain tax positions are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances and information available at the reporting date and is subject to management’s judgment. The Company recognizes interest and penalties on income taxes as a component of income tax expense. The Company files consolidated income tax returns with its subsidiaries. Trust Assets and Income Transfer of Financial Assets Earnings per Common Share Years Ended December 31 2015 2014 2013 Basic earnings per share Net income $ 20,549 $ 18,101 $ 19,876 Less: Preferred stock dividends 125 133 370 Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Basic earnings per share $ 1.94 $ 1.98 $ 2.26 Diluted earnings per share Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Effect of dilutive securities: Warrants 220,316 315,679 303,970 Restricted stock 32,010 39,476 40,160 Stock options 35,586 38,268 37,503 Weighted average shares outstanding 10,798,208 9,454,125 9,000,963 Diluted earnings per share $ 1.89 $ 1.90 $ 2.17 At December 31, 2015 and 2014 there were 2,500 shares and at December 31, 2013 there were zero shares that were not included in the computation of diluted earnings per share because they were non-dilutive. Dividend Restrictions Consolidated Statements of Cash Flows Comprehensive Income Share-Based Compensation Reclassifications Recent Accounting Pronouncements FASB Accounting Standards Updates No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities The FASB has issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance makes targeted improvements to existing U.S. GAAP by: • Requiring equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; • Requiring public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; • Requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; • Eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; • Eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and • Requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The new guidance permits early adoption of the own credit provision. In addition, the new guidance permits early adoption of the provision that exempts private companies and not-for-profit organizations from having to disclose fair value information about financial instruments measured at amortized cost. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments The FASB has issued Accounting Standards Update (ASU) No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. U.S. GAAP currently requires that during the measurement period, the acquirer retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill. Those adjustments are required when new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts initially recognized or would have resulted in the recognition of additional assets or liabilities. The acquirer also must revise comparative information for prior periods presented in financial statements as needed, including revising depreciation, amortization, or other income effects as a result of changes made to provisional amounts. The amendments require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. The only disclosures required at transition should be the nature of and reason for the change in accounting principle. An entity should disclose that information in the first annual period of adoption and in the interim periods within the first annual period if there is a measurement-period adjustment during the first annual period in which the changes are effective. FASB Accounting Standards Update No. 2015-15, Interest—Imputation of Interest (Subtopic 835-30), Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements The FASB has issued Accounting Standards Update (ASU) No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, Given the absence of authoritative guidance within ASU 2015-03 for debt issuance costs related to line-of-credit arrangements, the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-03, Interest— Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs The FASB has issued Accounting Standards Update (ASU) No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments should be applied on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. These disclosures include the nature of and reason for the change in accounting principle, the transition method, a description of the prior-period information that has been retrospectively adjusted, and the effect of the change on the financial statement line items (i.e., debt issuance cost asset and the debt liability). For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-01, Eliminating the Concept of Extraordinary Items The FASB has issued Accounting Standards Update (ASU) No. 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. This ASU eliminates from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. The entity also is required to disclose applicable income taxes and either present or disclose earnings-per-share data applicable to the extraordinary item. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements.

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Acquisition	Note 2 – Acquisition On July 1, 2015, Horizon completed the acquisition of Peoples Bancorp, an Indiana corporation (“Peoples”) and Horizon Bank N.A.’s acquisition of Peoples Federal Savings Bank of DeKalb County (“Peoples FSB”), through mergers effective July 1, 2015. Under the terms of the acquisition, the exchange ratio was 0.95 shares of Horizon common stock and $9.75 in cash for each outstanding share of Peoples common stock. Peoples shareholders owning fewer than 100 shares of common stock received $33.14 in cash for each common share. Peoples shares outstanding at the closing were 2,311,858, and the shares of Horizon common stock issued to Peoples shareholders totaled 2,192,202. Horizon’s stock price was $25.32 per share at the close of business on July 1, 2015. Based upon these numbers, the total value of the consideration for the acquisition was $78.1 million. The Company had approximately $4.9 million in costs related to the acquisition as of December 31, 2015. These expenses are classified in the other expense section of the income statement and primarily located in the salaries and employee benefits, professional services and other expense line items. As a result of the acquisition, the Company will have an opportunity to increase its deposit base and reduce transaction costs. The Company also expects to reduce cost through economies of scale. Under the purchase method of accounting, the total estimated purchase price is allocated to Peoples net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on management’s preliminary valuation of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on estimates and assumptions that are subject to change, the final purchase price for the Peoples acquisition is allocated as follows: ASSETS Cash and due from banks $ 205,054 Investment securities, held to maturity 2,038 Commercial 67,435 Residential mortgage 137,331 Consumer 19,593 Total loans 224,359 Premises and equipment, net 5,524 FRB and FHLB stock 2,743 Goodwill 21,424 Core deposit intangible 4,394 Interest receivable 1,279 Cash value of life insurance 13,898 Other assets 4,364 Total assets purchased $ 485,077 Common shares issued $ 55,506 Cash paid 22,641 Total estimated purchase price $ 78,147 LIABILITIES Deposits Non-interest bearing $ 28,251 NOW accounts 65,771 Savings and money market 125,176 Certificates of deposits 131,889 Total deposits 351,087 Borrowings 48,884 Interest payable 21 Other liabilities 6,938 Total liabilities assumed $ 406,930 Of the total purchase price of $78.1 million, $4.4 million has been allocated to core deposit intangible. Additionally, $21.0 million has been allocated to goodwill and none of the purchase price is deductible. The core deposit intangible will be amortized over seven years on a straight line basis. The Company acquired the $228.6 million loan portfolio at a fair value discount of $4.8 million. The performing portion of the portfolio, $223.4 million, had an estimated fair value of $220.0 million. The excess of expected cash flows above the fair value of the performing portion of loans will be accreted to interest income over the remaining lives of the loans in accordance with ASC 310-20. The Company acquired certain loans in the acquisition and the transferred loans had evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. The loans purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are considered to be credit impaired. Evidence of credit quality deterioration as of the purchase date may include information such as past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages. Purchased credit-impaired loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality (ASC 310-30) and initially measured at fair value, which includes estimated future credit losses expected to be incurred over the life of the loan. Accordingly, an allowance for credit losses related to these loans is not carried over and recorded at the acquisition date. Management estimated the cash flows expected to be collected at acquisition using our internal risk models, which incorporate the estimate of current key assumptions, such as default rates, severity and prepayment speeds. Loan with specific credit-related deterioration, since origination, are recorded at fair value, reflecting the present value of the amounts expected to be collected. Income recognition of these loans is based on reasonable expectation about the timing and amount of cash flows to be collected. The following table details the acquired loans that are accounted for in accordance with ASC 310-30 as of July 1, 2015. Contractually required principal and interest at acquisition $ 5,730 Contractual cash flows not expected to be collected (nonaccretable differences) 715 Expected cash flows at acquisition 5,015 Interest component of expected cash flows (accretable discount) 647 Fair value of acquired loans accounted for under ASC 310-30 $ 4,368 The results of operations of Peoples and Peoples FSB have been included in the Company’s consolidated financial statements since the acquisition dates. The following schedule includes pro forma results for the periods ended December 31, 2015 and December 31, 2014 as if the Peoples and Peoples FSB acquisitions had occurred as of the beginning of the comparable prior reporting period. December 31, December 31, 2015 2014 Summary of Operations: Net Interest Income $ 80,688 $ 75,442 Provision for Loan Losses 3,222 3,443 Net Interest Income after Provision for Loan Losses 77,466 71,999 Non-interest Income 32,295 29,928 Non-Interest Expense 80,489 74,010 Income before Income Taxes 29,272 27,917 Income Tax Expense 7,359 6,560 Net Income 21,913 21,357 Net Income Available to Common Shareholders $ 21,788 $ 21,372 Basic Earnings Per Share $ 1.90 $ 1.87 Diluted Earnings Per Share $ 1.85 $ 1.81 The pro forma information includes adjustments for interest income on loans, amortization of intangibles arising from the transaction, interest expense on deposits acquired, premises expense for the banking centers acquired and the related income tax effects. The pro forma information for the year ended 2015 includes $2.3 million, net of tax, of operating revenue from Peoples since the acquisition and approximately $3.3 million, net of tax, of non-recurring expenses directly attributable to the Peoples acquisition. The pro forma financial information is presented for information purposes only and is not indicative of the results of operations that actually would have been achieved had the acquisition consummated as of that time, nor is it intended to be a projection of future results. On April 3, 2014 Horizon closed its acquisition of SCB Bancorp, Inc. (“Summit”) and Horizon Bank N.A.’s acquisition of Summit Community Bank, through mergers effective as of that date. Under the final terms of the acquisition, the exchange ratio was 0.4904 shares of Horizon’s common stock and $5.15 in cash for each share of Summit common stock outstanding. Summit shares outstanding at the closing were 1,164,442, and the shares of Horizon common stock issued to Summit shareholders totaled 570,820. Horizon’s stock price was $22.23 per share at the close of business on April 3, 2014. Based upon these numbers, the total value of the consideration for the acquisition was $18.9 million (not including the retirement of Summit debt). For the year ended December 31, 2014, the Company had approximately $1.3 million in costs related to the acquisition. These expenses are classified in the other expense section of the income statement and primarily located in the salaries and employee benefits, professional services and other expense line items. As a result of the acquisition, the Company experienced, and expects to continue to experience, increases in its deposit base and reductions in transaction costs. The Company also expects to reduce cost through economies of scale. Under the purchase method of accounting, the total estimated purchase price is allocated to Summit’s net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on management’s preliminary valuation of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on estimates and assumptions that are subject to change, the preliminary purchase price for the Summit acquisition is allocated as follows: ASSETS Cash and due from banks $ 15,161 Commercial 70,441 Residential mortgage 43,448 Consumer 10,192 Total loans 124,081 Premises and equipment, net 2,548 FRB and FHLB stock 2,136 Goodwill 8,428 Core deposit intangible 822 Interest receivable 347 Cash value of life insurance 2,185 Other assets 2,877 Total assets purchased $ 158,585 LIABILITIES Deposits Non-interest bearing $ 27,274 NOW accounts 16,332 Savings and money market 35,045 Certificates of deposits 42,368 Total deposits 121,019 Borrowings 16,990 Interest payable 52 Other liabilities 599 Total liabilities assumed $ 138,660 Of the total estimated purchase price of $19.9 million, $822,000 has been allocated to core deposit intangible. Additionally, $8.4 million has been allocated to goodwill and $4.4 million of the purchase price is deductible and was assigned to the business assets. The core deposit intangible will be amortized over seven years on a straight line basis. The Company acquired loans in the acquisition and the transferred loans had evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. Loans purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are considered to be credit impaired. Evidence of credit quality deterioration as of the purchase date may include information such as past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages. Purchased credit-impaired loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality (ASC 310-30) and initially measured at fair value, which includes estimated future credit losses expected to be incurred over the life of the loan. Accordingly, an allowance for credit losses related to these loans is not carried over and recorded at the acquisition date. Management estimated the cash flows expected to be collected at acquisition using our internal risk models, which incorporate the estimate of current key assumptions, such as default rates, severity and prepayment speeds. The Company acquired the $130.5 million loan portfolio at a fair value discount of $6.4 million. The performing portion of the portfolio, $106.2 million, had an estimated fair value of $104.6 million. The excess of expected cash flows above the fair value of the performing portion of loans will be accreted to interest income over the remaining lives of the loans in accordance with ASC 310-20. Final estimates of loans for which specific credit-related deterioration has been identified, since origination, are recorded at fair value, reflecting the present value of the amounts expected to be collected. Income recognition of these loans is based on reasonable expectation about the timing and amount of cash flows to be collected. The following table details the acquired loans that are accounted for in accordance with ASC 310-30 as of April 3, 2014. Contractually required principal and interest at acquisition $ 14,460 Contractual cash flows not expected to be collected (nonaccretable differences) 3,146 Expected cash flows at acquisition 11,314 Interest component of expected cash flows (accretable discount) 1,688 Fair value of acquired loans accounted for under ASC 310-30 $ 9,626 Pro-forma statements were not presented due to the materiality of the transaction.

Cash Equivalents

Cash Equivalents	12 Months Ended
	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash Equivalents	Note 3 – Cash Equivalents The Company considers all liquid investments with original maturities of three months or less to be cash equivalents. At December 31, 2015 and 2014, cash equivalents consisted primarily of money market accounts with brokers and certificates of deposit. At December 31, 2015, the Company’s cash accounts exceeded federally insured limits by approximately $5.0 million.

Securities

Securities	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Securities	Note 4 – Securities The fair value of securities is as follows: December 31, 2015 Amortized Gross Gross Fair Value Available for sale U.S. Treasury and federal agencies $ 5,940 $ 3 $ (17 ) $ 5,926 State and municipal 73,829 1,299 (33 ) 75,095 Federal agency collateralized mortgage obligations 157,291 567 (1,655 ) 156,203 Federal agency mortgage-backed pools 206,970 2,080 (1,346 ) 207,704 Corporate notes 32 22 — 54 Total available for sale investment securities $ 444,062 $ 3,971 $ (3,051 ) $ 444,982 Held to maturity U.S. Treasury and federal agencies $ 5,859 $ 93 $ — $ 5,952 State and municipal 146,331 5,375 (253 ) 151,453 Federal agency collateralized mortgage obligations 9,051 27 (124 ) 8,954 Federal agency mortgage-backed pools 26,388 1,141 (185 ) 27,344 Total held to maturity investment securities $ 187,629 $ 6,636 $ (562 ) $ 193,703 December 31, 2014 Amortized Gross Gross Fair Value Available for sale U.S. Treasury and federal agencies $ 26,996 $ 56 $ (229 ) $ 26,823 State and municipal 46,535 1,462 (45 ) 47,952 Federal agency collateralized mortgage obligations 122,930 975 (1,045 ) 122,860 Federal agency mortgage-backed pools 122,583 3,172 (360 ) 125,395 Private labeled mortgage-backed pools 670 19 — 689 Corporate notes 32 13 — 45 Total available for sale investment securities $ 319,746 $ 5,697 $ (1,679 ) $ 323,764 Held to maturity U.S. Treasury and federal agencies $ 9,804 $ 82 $ — $ 9,886 State and municipal 129,595 3,398 (106 ) 132,887 Federal agency collateralized mortgage obligations 4,039 35 (1 ) 4,073 Federal agency mortgage-backed pools 22,329 729 — 23,058 Total held to maturity investment securities $ 165,767 $ 4,244 $ (107 ) $ 169,904 Based on evaluation of available evidence, including recent changes in market interest rates, credit rating information, and information obtained from regulatory filings, management believes the declines in fair value for these securities are temporary. While these securities are held in the available for sale portfolio and held-to-maturity, Horizon intends, and has the ability, to hold them until the earlier of a recovery in fair value or maturity. Should the impairment of any of these securities become other than temporary, the cost basis of the investment will be reduced and the resulting loss recognized in net income in the period the other-than-temporary impairment is identified. At December 31, 2015, no individual investment security had an unrealized loss that was determined to be other-than-temporary. The unrealized losses on the Company’s investments in securities of state and municipal governmental agencies, U.S. Treasury and federal agencies, federal agency collateralized mortgage obligations, and federal agency mortgage-backed pools were caused by interest rate volatility and not a decline in credit quality. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. The Company expects to recover the amortized cost basis over the term of the securities. Because the Company does not intend to sell the investments and it is not likely that the Company will be required to sell the investments before recovery of their amortized cost basis, which may be at maturity, the Company did not consider those investments to be other-than-temporarily impaired at December 31, 2015. The Company elected to transfer 319 available-for-sale (“AFS”) securities with an aggregate fair value of $167.1 million to a classification of held-to-maturity (“HTM”) on April 1, 2014. In accordance with FASB ASC 320-10-55-24, the transfer from AFS to HTM must be recorded at the fair value of the AFS securities at the time of transfer. The net unrealized holding gain of $1.3 million, net of tax, at the date of transfer was retained in accumulated other comprehensive income (loss), with the associated pre-tax amount retained in the carrying value of the HTM securities. Such amounts will be amortized to comprehensive income over the remaining life of the securities. The fair value of the transferred AFS securities became the book value of the HTM securities at April 1, 2014, with no unrealized gain or loss at this date. Future reporting periods, with potential changes in market value for these securities, would likely record an unrealized gain or loss for disclosure purposes. The amortized cost and fair value of securities available for sale and held-to-maturity at December 31, 2015 and December 31, 2014, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. December 31, 2015 December 31, 2014 Amortized Fair Amortized Fair Cost Value Cost Value Available for sale Within one year $ 7,192 $ 7,232 $ 6,098 $ 6,169 One to five years 38,197 38,894 44,720 45,093 Five to ten years 16,807 17,152 16,147 16,768 After ten years 17,605 17,797 6,598 6,790 79,801 81,075 73,563 74,820 Federal agency collateralized mortgage obligations 157,291 156,203 122,930 122,860 Federal agency mortgage-backed pools 206,970 207,704 122,583 125,395 Private labeled mortgage-backed pools — — 670 689 Total available for sale investment securities $ 444,062 $ 444,982 $ 319,746 $ 323,764 Held to maturity Within one year $ — $ — $ — $ — One to five years 17,815 18,403 592 593 Five to ten years 106,167 110,026 99,225 101,323 After ten years 28,208 28,976 39,582 40,857 152,190 157,404 139,399 142,773 Federal agency collateralized mortgage obligations 9,051 8,954 4,039 4,073 Federal agency mortgage-backed pools 26,388 27,344 22,329 23,058 Total held to maturity investment securities $ 187,629 $ 193,703 $ 165,767 $ 169,904 The following table shows the gross unrealized losses and the fair value of the Company’s investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position. Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Value Losses Value Losses Value Losses U.S. Treasury and federal agencies $ 5,468 $ (17 ) $ — $ — $ 5,468 $ (17 ) State and municipal 17,353 (280 ) 446 (6 ) 17,799 (286 ) Federal agency collateralized mortgage obligations 89,459 (1,123 ) 25,428 (655 ) 114,887 (1,779 ) Federal agency mortgage-backed pools 113,244 (1,212 ) 16,506 (319 ) 129,750 (1,531 ) Total temporarily impaired securities $ 225,524 $ (2,632 ) $ 42,380 $ (980 ) $ 267,904 $ (3,613 ) Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2014 Value Losses Value Losses Value Losses U.S. Treasury and federal agencies $ 2,993 $ (7 ) $ 20,762 $ (222 ) $ 23,755 $ (229 ) State and municipal 10,287 (121 ) 2,050 (30 ) 12,337 (151 ) Federal agency collateralized mortgage obligations 15,013 (88 ) 39,801 (957 ) 54,814 (1,045 ) Federal agency mortgage-backed pools 5,993 (9 ) 28,044 (351 ) 34,037 (360 ) Total temporarily impaired securities $ 34,286 $ (225 ) $ 90,657 $ (1,560 ) $ 124,943 $ (1,785 ) U.S. Treasury, federal agency, state and municipal The unrealized losses on the Company’s investments in U.S. Treasury, federal agency and state and municipals were caused by interest rate changes. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost bases of the investments. Because the Company does not intend to sell the investments and it is not more likely than not the Company will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Company does not consider those investments to be other-than-temporarily impaired at December 31, 2015. Federal agency mortgage-backed pools and collateralized mortgage obligations The unrealized losses on the Company’s investment in federal agency mortgage backed pools and collateralized mortgage obligations securities were caused by interest rate changes. The Company expects to recover the amortized cost basis over the term of the securities. Because the decline in market value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell the investments and it is not more likely than not the Company will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Company does not consider those investments to be other-than-temporarily impaired at December 31, 2015. Information regarding security proceeds, gross gains and gross losses are presented below. Years ended December 31 2015 2014 2013 Sales of securities available for sale Proceeds $ 43,051 $ 45,228 $ 23,853 Gross gains 254 988 382 Gross losses (65 ) — (8 ) The tax effect of the proceeds from the sale of securities available for sale was $66, $346 and $131 for the years ended December 31, 2015, 2014 and 2013, respectively. The Company pledges securities to secure retail and corporate repurchase agreements to the Federal Reserve for borrowing availability and as settlements for the fair value of swap agreements. At December 31, 2015, the Company had pledged $168.9 million of fair value or $167.7 million of amortized cost, in securities as collateral for $154.4 million in repurchase agreements, $90.7 million of fair value or $88.7 million of amortized cost, in securities as collateral for borrowing availability at the Federal Reserve with no current outstanding borrowings and $12.7 million of fair value or $12.5 million of amortized cost, in securities as collateral for $4.9 million in settlements on the fair value of swap agreements.

Loans

Loans	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans	Note 5 – Loans December 31 December 31 2015 2014 Commercial Working capital and equipment $ 381,245 $ 300,940 Real estate, including agriculture 391,668 343,455 Tax exempt 8,674 8,595 Other 23,408 21,324 Total 804,995 674,314 Real estate 1–4 family 433,015 250,799 Other 4,129 3,826 Total 437,144 254,625 Consumer Auto 168,397 154,538 Recreation 5,365 5,673 Real estate/home improvement 47,015 38,288 Home equity 127,113 112,426 Unsecured 4,120 3,613 Other 10,290 5,921 Total 362,300 320,459 Mortgage warehouse 144,692 129,156 Total loans 1,749,131 1,378,554 Allowance for loan losses (14,534 ) (16,501 ) Loans, net $ 1,734,597 $ 1,362,053 Commercial Commercial loans are primarily based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected, and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Commercial real estate loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves larger loan principal amounts and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s commercial real estate portfolio are diverse in terms of property type, and are monitored for concentrations of credit. Management monitors and evaluates commercial real estate loans based on collateral, cash flow and risk grade criteria. As a general rule, the Company avoids financing single purpose projects unless other underwriting factors are present to help mitigate risk. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Real Estate and Consumer With respect to residential loans that are secured by 1-4 family residences and are generally owner occupied, the Company generally establishes a maximum loan-to-value ratio and requires private mortgage insurance if that ratio is exceeded. Home equity loans are typically secured by a subordinate interest in 1-4 family residences, and consumer loans are secured by consumer assets such as automobiles or recreational vehicles. Some consumer loans are unsecured such as small installment loans and certain lines of credit. Repayment of these loans is primarily dependent on the personal income of the borrowers, which can be impacted by economic conditions in their market areas such as unemployment levels. Repayment can also be impacted by changes in property values on residential properties. Risk is mitigated by the fact that the loans are of smaller individual amounts and spread over a large number of borrowers. Mortgage Warehousing Horizon’s mortgage warehouse lending has specific mortgage companies as customers of Horizon Bank. Individual mortgage loans originated by these mortgage companies are funded as a secured borrowing with a pledge of collateral under Horizon’s agreement with the mortgage company. Each individual mortgage and the related mortgagee are underwritten by Horizon to the end investor guidelines and is assigned to Horizon until the loan is sold to the secondary market by the mortgage company. In addition, Horizon takes possession of each original note and forwards such note to the end investor once the mortgage company has sold the loan. At the time a loan is transferred to the secondary market, the mortgage company reacquires the loan under its option within the agreement. Due to the reacquire feature contained in the agreement, the transaction does not qualify as a sale and therefore is accounted for as a secured borrowing with a pledge of collateral pursuant to the agreement with the mortgage company. When the individual loan is sold to the end investor by the mortgage company, the proceeds from the sale of the loan are received by Horizon and used to pay off the loan balance with Horizon along with any accrued interest and any related fees. The remaining balance from the sale is forwarded to the mortgage company. These individual loans typically are sold by the mortgage company within 30 days and are seldom held more than 90 days. Interest income is accrued during this period and collected at the time each loan is sold. Fee income for each loan sold is collected when the loan is sold, and no costs are deferred due to the term between each loan funding and related payoff, which is typically less than 30 days. Based on the agreements with each mortgage company, at any time a mortgage company can reacquire from Horizon its outstanding loan balance on an individual mortgage and regain possession of the original note. Horizon also has the option to request that the mortgage company reaquire an individual mortgage. Should this occur, Horizon would return the original note and reassign the assignment of the mortgage to the mortgage company. Also, in the event that the end investor would not be able to honor the purchase commitment and the mortgage company would not be able to reacquire its loan on an individual mortgage, Horizon would be able to exercise its rights under the agreement. The following table shows the recorded investment of individual loan categories. December 31, 2015 Loan Interest Due Deferred Recorded Owner occupied real estate $ 268,281 $ 613 $ 1,328 $ 270,222 Non owner occupied real estate 326,399 306 497 327,202 Residential spec homes 5,018 9 17 5,044 Development & spec land loans 18,183 33 26 18,242 Commercial and industrial 184,911 1,246 335 186,492 Total commercial 802,792 2,207 2,203 807,202 Residential mortgage 414,924 1,275 2,470 418,669 Residential construction 19,751 34 — 19,785 Mortgage warehouse 144,692 480 — 145,172 Total real estate 579,367 1,789 2,470 583,626 Direct installment 54,341 168 (359 ) 54,150 Direct installment purchased 153 — — 153 Indirect installment 151,523 323 — 151,846 Home equity 157,164 628 (522 ) 157,270 Total consumer 363,181 1,119 (881 ) 363,419 Total loans 1,745,340 5,115 3,792 1,754,247 Allowance for loan losses (14,534 ) — — (14,534 ) Net loans $ 1,730,806 $ 5,115 $ 3,792 $ 1,739,713 December 31, 2014 Loan Interest Due Deferred Recorded Owner occupied real estate $ 228,380 $ 385 $ 680 $ 229,445 Non owner occupied real estate 297,299 309 506 298,114 Residential spec homes 2,027 2 — 2,029 Development & spec land loans 12,097 28 30 12,155 Commercial and industrial 133,256 859 39 134,154 Total commercial 673,059 1,583 1,255 675,897 Residential mortgage 242,521 737 599 243,857 Residential construction 11,505 21 — 11,526 Mortgage warehouse 129,156 480 — 129,636 Total real estate 383,182 1,238 599 385,019 Direct installment 40,137 129 (375 ) 39,891 Direct installment purchased 219 — — 219 Indirect installment 141,868 314 (163 ) 142,019 Home equity 139,007 568 (234 ) 139,341 Total consumer 321,231 1,011 (772 ) 321,470 Total loans 1,377,472 3,832 1,082 1,382,386 Allowance for loan losses (16,501 ) — — (16,501 ) Net loans $ 1,360,971 $ 3,832 $ 1,082 $ 1,365,885

Accounting for Certain Loans Ac

Accounting for Certain Loans Acquired in a Transfer	12 Months Ended
	Dec. 31, 2015
Transfers and Servicing [Abstract]
Accounting for Certain Loans Acquired in a Transfer	Note 6 – Accounting for Certain Loans Acquired in a Transfer The Company acquired loans in acquisitions and the transferred loans had evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. Loans purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are considered to be credit impaired. Evidence of credit quality deterioration as of the purchase date may include information such as past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages. Purchased credit-impaired loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality (ASC 310-30) and initially measured at fair value, which includes estimated future credit losses expected to be incurred over the life of the loan. Accordingly, an allowance for credit losses related to these loans is not carried over and recorded at the acquisition date. Management estimated the cash flows expected to be collected at acquisition using our internal risk models, which incorporate the estimate of current key assumptions, such as default rates, severity and prepayment speeds. The carrying amounts of those loans included in the balance sheet amounts of loans receivable are as follows: December 31 December 31 December 31 December 31 2015 2015 2015 2015 Heartland Summit Peoples Total Commercial $ 1,633 $ 5,567 $ 1,061 $ 8,261 Real estate 693 1,216 179 2,088 Consumer 6 35 — 41 Outstanding balance $ 2,332 $ 6,818 $ 1,240 $ 10,390 Carrying amount, net of allowance of $63 $ 10,327 December 31 December 31 December 31 December 31 2014 2014 2014 2014 Heartland Summit Peoples Total Commercial $ 5,492 $ 7,725 $ — $ 13,217 Real estate 900 1,458 — 2,358 Consumer 8 43 — 51 Outstanding balance $ 6,400 $ 9,226 $ — $ 15,626 Carrying amount, net of allowance of $359 $ 15,267 Accretable yield, or income expected to be collected are as follows: Twelve Months Ended December 31, 2015 Heartland Summit Peoples Total Balance at January 1 $ 2,400 $ 1,268 $ — $ 3,668 Additions — — 647 647 Accretion (327 ) (315 ) (83 ) (725 ) Reclassification from nonaccretable difference — — — — Disposals (1,278 ) (245 ) (9 ) (1,532 ) Balance at December 31 $ 795 $ 708 $ 555 $ 2,058 Twelve Months Ended December 31, 2014 Heartland Summit Peoples Total Balance at January 1 $ 3,185 $ — $ — $ 3,185 Additions — 1,688 — 1,688 Accretion (557 ) (332 ) — (889 ) Reclassification from nonaccretable difference — — — — Disposals (228 ) (88 ) — (316 ) Balance at December 31 $ 2,400 $ 1,268 $ — $ 3,668 During the years ended December 31, 2015 and 2014, the Company increased (decreased) the allowance for loan losses by a charge to the income statement of $(190,000) and $253,000, respectively. $63,000 and $283,000 of allowances for loan losses were reversed for the years ended December 31, 2015 and 2014, respectively.

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Allowance for Loan Losses	Note 7 – Allowance for Loan Losses The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over the prior one to five years. Management believes the five-year historical loss experience methodology is appropriate in the current economic environment, as it captures loss rates that are comparable to the current period being analyzed. The actual allowance for loan loss activity is provided below. December 31 December 31 December 31 2015 2014 2013 Balance at beginning of the period $ 16,501 $ 15,992 $ 18,270 Loans charged-off: Commercial Owner occupied real estate 2,208 40 138 Non owner occupied real estate 556 136 937 Residential development — — — Development & Spec Land Loans — 173 182 Commercial and industrial 673 1,453 1,275 Total commercial 3,437 1,802 2,532 Real estate Residential mortgage 288 328 1,055 Residential construction — — — Mortgage warehouse — — — Total real estate 288 328 1,055 Consumer Direct Installment 367 250 333 Direct Installment Purchased — — — Indirect Installment 1,081 1,233 1,178 Home Equity 926 516 1,152 Total consumer 2,374 1,999 2,663 Total loans charged-off 6,099 4,129 6,250 Recoveries of loans previously charged-off: Commercial Owner occupied real estate 104 13 65 Non owner occupied real estate 1 210 71 Residential development — — — Development & Spec Land Loans 35 55 — Commercial and industrial 52 495 532 Total commercial 192 773 668 Real estate Residential mortgage 69 21 114 Residential construction — — — Mortgage warehouse — — — Total real estate 69 21 114 Consumer Direct Installment 106 67 488 Direct Installment Purchased — — — Indirect Installment 489 560 658 Home Equity 114 159 124 Total consumer 709 786 1,270 Total loan recoveries 970 1,580 2,052 Net loans charged-off (recovered) 5,129 2,549 4,198 Provision charged to operating expense Commercial 2,531 2,277 756 Real estate 62 (1,153 ) 1,132 Consumer 569 1,934 32 Total provision charged to operating expense 3,162 3,058 1,920 Balance at the end of the period $ 14,534 $ 16,501 $ 15,992 Certain loans are individually evaluated for impairment, and the Company’s general practice is to proactively charge down impaired loans to the fair value of the underlying collateral. Consistent with regulatory guidance, charge-offs on all loan segments are taken when specific loans, or portions thereof, are considered uncollectible. The Company’s policy is to promptly charge these loans off in the period the uncollectible loss is reasonably determined. For all loan portfolio segments except 1-4 family residential and consumer loans, the Company promptly charges-off loans, or portions thereof, when available information confirms that specific loans are uncollectible based on information that includes, but is not limited to, (1) the deteriorating financial condition of the borrower, (2) declining collateral values, and/or (3) legal action, including bankruptcy, that impairs the borrower’s ability to adequately meet its obligations. For impaired loans that are considered to be solely collateral dependent, a partial charge-off is recorded when a loss has been confirmed by an updated appraisal or other appropriate valuation of the collateral. The Company charges-off 1-4 family residential and consumer loans, or portions thereof, when the Company reasonably determines the amount of the loss. The Company adheres to timeframes established by applicable regulatory guidance which provides for the charge-down or specific allocation of 1-4 family first and junior lien mortgages to the net realizable value less costs to sell when the value is known but no later than when a loan is 180 days past due. Pursuant to such guidelines, the Company also charges-off unsecured open-end loans when the loan is 90 days past due, and charges down to the net realizable value other secured loans when they are 90 days past due. Loans at these respective delinquency thresholds for which the Company can clearly document that the loan is both well-secured and in the process of collection, such that collection in full will occur regardless of delinquency status, are not charged off. The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment analysis: December 31, 2015 Commercial Real Estate Mortgage Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 202 $ — $ — $ — $ 202 Collectively evaluated for impairment 6,739 2,476 1,007 3,856 14,078 Loans acquired with deteriorated credit quality 254 — — — 254 Total ending allowance balance $ 7,195 $ 2,476 $ 1,007 $ 3,856 $ 14,534 Loans: Individually evaluated for impairment $ 7,019 $ — $ — $ — $ 7,019 Collectively evaluated for impairment 798,454 438,454 145,172 363,419 1,745,499 Loans acquired with deteriorated credit quality 1,729 — — — 1,729 Total ending loans balance $ 807,202 $ 438,454 $ 145,172 $ 363,419 $ 1,754,247 December 31, 2014 Commercial Real Estate Mortgage Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,589 $ — $ — $ — $ 1,589 Collectively evaluated for impairment 5,827 2,508 1,132 4,951 14,418 Loans acquired with deteriorated credit quality 494 — — — 494 Total ending allowance balance $ 7,910 $ 2,508 $ 1,132 $ 4,951 $ 16,501 Loans: Individually evaluated for impairment $ 11,055 $ — $ — $ — $ 11,055 Collectively evaluated for impairment 664,251 255,383 129,636 321,470 1,370,740 Loans acquired with deteriorated credit quality 591 — — — 591 Total ending loans balance $ 675,897 $ 255,383 $ 129,636 $ 321,470 $ 1,382,386

Non-performing Assets and Impai

Non-performing Assets and Impaired Loans	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Non-performing Assets and Impaired Loans	Note 8 – Non-performing Assets and Impaired Loans The following table presents the nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured (“TDRs”) by class of loans: December 31, 2015 Non-accrual Loans Past Due Over 90 Days Still Accruing Non- Performing Total Non- Commercial Owner occupied real estate $ 1,749 $ — $ — $ — $ 1,749 Non owner occupied real estate 3,034 — 1,915 60 5,009 Residential development — — — — — Development & Spec Land Loans 71 — — — 71 Commercial and industrial 176 — — — 176 Total commercial 5,030 — 1,915 60 7,005 Real estate Residential mortgage 4,354 1 824 808 5,987 Residential construction — — 250 — 250 Mortgage warehouse — — — — — Total real estate 4,354 1 1,074 808 6,237 Consumer Direct Installment 541 — — — 541 Direct Installment Purchased — — — — — Indirect Installment 601 27 — — 628 Home Equity 1,736 — 183 350 2,269 Total Consumer 2,878 27 183 350 3,438 Total $ 12,262 $ 28 $ 3,172 $ 1,218 $ 16,680 December 31, 2014 Non-accrual Loans Past Days Still Accruing Non- Performing Total Non- Commercial Owner occupied real estate $ 1,773 $ — $ — $ 44 $ 1,817 Non owner occupied real estate 7,439 — 217 566 8,222 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 812 — 1,004 — 1,816 Total commercial 10,024 — 1,221 610 11,855 Real estate Residential mortgage 2,297 40 765 2,526 5,628 Residential construction — — 266 — 266 Mortgage warehouse — — — — — Total real estate 2,297 40 1,031 2,526 5,894 Consumer Direct Installment 227 10 — — 237 Direct Installment Purchased — — — — — Indirect Installment 557 47 — — 604 Home Equity 2,207 18 391 1,236 3,852 Total Consumer 2,991 75 391 1,236 4,693 Total $ 15,312 $ 115 $ 2,643 $ 4,372 $ 22,442 Included in the $12.3 million of non-accrual loans and the $3.2 million of non-performing TDRs at December 31, 2015 were $2.9 million and $110,000, respectively, of loans acquired for which there were accretable yields recognized. From time to time, the Bank obtains information that may lead management to believe that the collection of payments may be doubtful on a particular loan. In recognition of this, it is management’s policy to convert the loan from an “earning asset” to a non-accruing loan. The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified due date. Further, it is management’s policy to place a loan on a non-accrual status when the payment is delinquent in excess of 90 days or the loan has had the accrual of interest discontinued by management. The officer responsible for the loan and the Chief Operating Officer or the senior collection officer must review all loans placed on non-accrual status. Subsequent payments on non-accrual loans are recorded as a reduction of principal, and interest income is recorded only after principal recovery is reasonably assured. Nonaccrual loans are returned to accrual status when, in the opinion of management, the financial position of the borrower indicates there is no longer any reasonable doubt as to the timely collection of interest or principal in accordance with the loan terms. The Company requires a period of satisfactory performance of not less than six months before returning a nonaccrual loan to accrual status. A loan becomes impaired when, based on current information, it is probable that a creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. When a loan is classified as impaired, the degree of impairment must be recognized by estimating future cash flows from the debtor. The present value of these cash flows is computed at a discount rate based on the interest rate contained in the loan agreement. However, if a particular loan has a determinable market value for its collateral, the creditor may use that value. Also, if the loan is secured and considered collateral dependent, the creditor may use the fair value of the collateral. Interest income on loans individually classified as impaired is recognized on a cash basis after all past due and current principal payments have been made. Smaller-balance, homogeneous loans are evaluated for impairment in total. Such loans include residential first mortgage loans secured by 1 – 4 family residences, residential construction loans, automobile, home equity, second mortgage loans and mortgage warehouse loans. Commercial loans and mortgage loans secured by other properties are evaluated individually for impairment. When analysis of borrower operating results and financial condition indicate that underlying cash flows of a borrower’s business are not adequate to meet its debt service requirements, the loan is evaluated for impairment. Often this is associated with a delay or shortfall in payments of 30 days or more. Loans are generally moved to non-accrual status when they are 90 days or more past due. These loans are often considered impaired. Impaired loans, or portions thereof, are charged off when deemed uncollectible. Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms, including TDRs, are measured for impairment. Allowable methods for determining the amount of impairment include estimating fair value using the fair value of the collateral for collateral-dependent loans. The Company’s TDRs are considered impaired loans and included in the allowance methodology using the guidance for impaired loans. At December 31, 2015, the type of concessions the Company has made on restructured loans has been temporary rate reductions and/or reductions in monthly payments and there have been no restructured loans with modified recorded balances. Any modification to a loan that is a concession and is not in the normal course of lending is considered a restructured loan. A restructured loan is returned to accruing status after six consecutive payments but is still reported as TDR unless the loan bears interest at a market rate. As of December 31, 2015, the Company had $4.4 million in TDRs and $1.2 million were performing according to the restructured terms and no TDRs were returned to accrual status during 2015. There was $140,000 of specific reserves allocated to TDRs at December 31, 2015 based on the collateral deficiencies. The following table presents commercial loans individually evaluated for impairment by class of loans: Twelve Months Ending December 31, 2015 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,340 $ 1,339 $ — $ 1,001 $ 22 Non owner occupied real estate 4,938 4,953 — 5,417 8 Residential development — — — — — Development & Spec Land Loans 71 71 — 6 3 Commercial and industrial 79 79 — 275 4 Total commercial 6,428 6,442 — 6,699 37 With an allowance recorded Commercial Owner occupied real estate 410 410 105 243 8 Non owner occupied real estate 70 70 32 6 13 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 97 97 65 162 — Total commercial 577 577 202 411 21 Total $ 7,005 $ 7,019 $ 202 $ 7,110 $ 58 Twelve Months Ending December 31, 2014 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,169 $ 1,170 $ — $ 645 $ 65 Non owner occupied real estate 1,193 1,194 — 1,341 51 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 854 854 — 357 27 Total commercial 3,216 3,218 — 2,343 143 With an allowance recorded Commercial Owner occupied real estate 422 422 165 141 16 Non owner occupied real estate 6,453 6,453 744 1,995 208 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 962 962 680 798 12 Total commercial 7,837 7,837 1,589 2,934 236 Total $ 11,053 $ 11,055 $ 1,589 $ 5,277 $ 379 Twelve Months Ending December 31, 2013 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,293 $ 1,296 $ — $ 1,845 $ 68 Non owner occupied real estate 3,521 3,525 — 2,963 172 Residential development — — — — — Development & Spec Land Loans 23 23 — 25 — Commercial and industrial 390 405 — 712 — Total commercial 5,227 5,249 — 5,545 240 With an allowance recorded Commercial Owner occupied real estate — — — — — Non owner occupied real estate 403 403 202 485 — Residential development — — — — — Development & Spec Land Loans 159 159 48 166 — Commercial and industrial 1,637 1,637 1,062 1,140 31 Total commercial 2,199 2,199 1,312 1,791 31 Total $ 7,426 $ 7,448 $ 1,312 $ 7,336 $ 271 The following table presents the payment status by class of loans: December 31, 2015 30 - 59 Days Past Due 60 - 89 Days Greater than 90 Total Past Due Loans Not Past Total Commercial Owner occupied real estate $ 481 $ 18 $ — $ 499 $ 267,782 $ 268,281 Non owner occupied real estate 49 — — 49 326,350 326,399 Residential development — — — — 5,018 5,018 Development & Spec Land Loans — — — — 18,183 18,183 Commercial and industrial 32 — — 32 184,879 184,911 Total commercial 562 18 — 580 802,212 802,792 Real estate Residential mortgage 1,121 344 1 1,466 413,458 414,924 Residential construction — — — — 19,751 19,751 Mortgage warehouse — — — — 144,692 144,692 Total real estate 1,121 344 1 1,466 577,901 579,367 Consumer Direct Installment 106 10 — 116 54,225 54,341 Direct Installment Purchased — — — — 153 153 Indirect Installment 1,186 268 27 1,481 150,042 151,523 Home Equity 1,193 203 — 1,396 155,768 157,164 Total consumer 2,485 481 27 2,993 360,188 363,181 Total $ 4,168 $ 843 $ 28 $ 5,039 $ 1,740,301 $ 1,745,340 Percentage of total loans 0.24 % 0.05 % 0.00 % 0.29 % 99.71 % December 31, 2014 30 - 59 Days 60 - 89 Days Greater than 90 Total Past Due Loans Not Past Total Commercial Owner occupied real estate $ 103 $ 645 $ — $ 748 $ 227,632 $ 228,380 Non owner occupied real estate 413 — — 413 296,886 297,299 Residential development — — — — 2,027 2,027 Development & Spec Land Loans — — — — 12,097 12,097 Commercial and industrial 19 1 — 20 133,236 133,256 Total commercial 535 646 — 1,181 671,878 673,059 Real estate Residential mortgage 1,033 193 40 1,266 241,255 242,521 Residential construction — — — — 11,505 11,505 Mortgage warehouse — — — — 129,156 129,156 Total real estate 1,033 193 40 1,266 381,916 383,182 Consumer Direct Installment 113 4 10 127 40,010 40,137 Direct Installment Purchased — — — — 219 219 Indirect Installment 1,042 243 47 1,332 140,536 141,868 Home Equity 1,084 189 18 1,291 137,716 139,007 Total consumer 2,239 436 75 2,750 318,481 321,231 Total $ 3,807 $ 1,275 $ 115 $ 5,197 $ 1,372,275 $ 1,377,472 Percentage of total loans 0.28 % 0.09 % 0.01 % 0.38 % 99.62 % The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified due date. Horizon Bank’s processes for determining credit quality differ slightly depending on whether a new loan or a renewed loan is being underwritten, or whether an existing loan is being re-evaluated for credit quality. The latter usually occurs upon receipt of current financial information or other pertinent data that would trigger a change in the loan grade. • For new and renewed commercial loans, the Bank’s Credit Department, which acts independently of the loan officer, assigns the credit quality grade to the loan. Loan grades for loans with an aggregate credit exposure that exceeds the authorities in the respective markets (ranging from $1,000,000 to $2,500,000) are validated by the Loan Committee, which is chaired by the Chief Credit Officer (CCO). • Commercial loan officers are responsible for reviewing their loan portfolios and report any adverse material change to the CCO or Loan Committee. When circumstances warrant a change in the credit quality grade, loan officers are required to notify the CCO and the Credit Department of the change in the loan grade. Downgrades are accepted immediately by the CCO, however, lenders must present their factual information to either the Loan Committee or the CCO when recommending an upgrade. • The CCO, or his designee, meets weekly with loan officers to discuss the status of past-due loans and classified loans. These meetings are also designed to give the loan officers an opportunity to identify an existing loan that should be downgraded to a classified grade. • Monthly, senior management meets with the Watch Committee, which reviews all of the past due, classified, and impaired loans and the relative trends of these assets. This committee also reviews the actions taken by management regarding foreclosure mitigation, loan extensions, troubled debt restructures, other real estate owned and personal property repossessions. The information reviewed in this meeting acts as a precursor for developing management’s analysis of the adequacy of the Allowance for Loan and Lease Losses. For residential real estate and consumer loans, Horizon uses a grading system based on delinquency. Loans that are 90 days or more past due, on non-accrual, or are classified as a TDR are graded “Substandard.” After being 90 days delinquent a loan is charged off unless it is well secured and in the process of collection. If the latter case exists, the loan is placed on non-accrual. Occasionally a mortgage loan may be graded as “Special Mention.” When this situation arises, it is because the characteristics of the loan and the borrower fit the definition of a Risk Grade 5 described below, which is normally used for grading commercial loans. Loans not graded Substandard are considered Pass. Horizon Bank employs a nine-grade rating system to determine the credit quality of commercial loans. The first five grades represent acceptable quality, and the last four grades mirror the criticized and classified grades used by the bank regulatory agencies (special mention, substandard, doubtful, and loss). The loan grade definitions are detailed below. Risk Grade 1: Excellent (Pass) Loans secured by liquid collateral, such as certificates of deposit, reputable bank letters of credit, or other cash equivalents; loans that are guaranteed or otherwise backed by the full faith and credit of the United States government or an agency thereof, such as the Small Business Administration; or loans to any publicly held company with a current long-term debt rating of A or better. Risk Grade 2: Good (Pass) Loans to businesses that have strong financial statements containing an unqualified opinion from a CPA firm and at least three consecutive years of profits; loans supported by unaudited financial statements containing strong balance sheets, five consecutive years of profits, a five-year satisfactory relationship with the Bank, and key balance sheet and income statement trends that are either stable or positive; loans secured by publicly traded marketable securities where there is no impediment to liquidation; loans to individuals backed by liquid personal assets and unblemished credit history; or loans to publicly held companies with current long-term debt ratings of Baa or better. Risk Grade 3: Satisfactory (Pass) Loans supported by financial statements (audited or unaudited) that indicate average or slightly below average risk and having some deficiency or vulnerability to changing economic conditions; loans with some weakness but offsetting features of other support are readily available; loans that are meeting the terms of repayment, but which may be susceptible to deterioration if adverse factors are encountered. Loans may be graded Satisfactory when there is no recent information on which to base a current risk evaluation and the following conditions apply: • At inception, the loan was properly underwritten, did not • At inception, the loan was secured with collateral possessing a loan value adequate to protect the Bank from loss. • The loan has exhibited two or more years of satisfactory repayment with a reasonable reduction of the principal balance. • During the period that the loan has been outstanding, there has been no evidence of any credit weakness. Some examples of weakness include slow payment, lack of cooperation by the borrower, breach of loan covenants, or the borrower is in an industry known to be experiencing problems. If any of these credit weaknesses is observed, a lower risk grade may be warranted. Risk Grade 4 Satisfactory/Monitored: Loans in this category are considered to be of acceptable credit quality, but contain greater credit risk than Satisfactory loans. Borrower displays acceptable liquidity, leverage, and earnings performance within the Bank’s minimum underwriting guidelines. The level of risk is acceptable but conditioned on the proper level of loan officer supervision. Loans that normally fall into this grade include acquisition, construction and development loans and income producing properties that have not reached stabilization. Risk Grade 4W Management Watch: Loans in this category are considered to be of acceptable quality, but with above normal risk. Borrower displays potential indicators of weakness in the primary source of repayment resulting in a higher reliance on secondary sources of repayment. Balance sheet may exhibit weak liquidity and/or high leverage. There is inconsistent earnings performance without the ability to sustain adverse economic conditions. Borrower may be operating in a declining industry or the property type, as for a commercial real estate loan, may be high risk or in decline. These loans require an increased level of loan officer supervision and monitoring to assure that any deterioration is addressed in a timely fashion. Risk Grade 5: Special Mention Loans which possess some credit deficiency or potential weakness which deserves close attention. Such loans pose an unwarranted financial risk that, if not corrected, could weaken the loan by adversely impacting the future repayment ability of the borrower. The key distinctions of a Special Mention classification are that (1) it is indicative of an unwarranted Risk Grade 6: Substandard One or more of the following characteristics may be exhibited in loans classified Substandard: • Loans which possess a defined credit weakness. The likelihood that a loan will be paid from the primary source of repayment is uncertain. Financial deterioration is under way and very close attention is warranted to ensure that the loan is collected without loss. • Loans are inadequately protected by the current net worth and paying capacity of the obligor. • The primary source of repayment is gone, and the Bank is forced to rely on a secondary source of repayment, such as collateral liquidation or guarantees. • Loans have a distinct possibility that the Bank will sustain some loss if deficiencies are not corrected. • Unusual courses of action are needed to maintain a high probability of repayment. • The borrower is not generating enough cash flow to repay loan principal; however, it continues to make interest payments. • The lender is forced into a subordinated or unsecured position due to flaws in documentation. • Loans have been restructured so that payment schedules, terms, and collateral represent concessions to the borrower when compared to the normal loan terms. • The lender is seriously contemplating foreclosure or legal action due to the apparent deterioration in the loan. • There is a significant deterioration in market conditions to which the borrower is highly vulnerable. Risk Grade 7: Doubtful One or more of the following characteristics may be present in loans classified Doubtful: • Loans have all of the weaknesses of those classified as Substandard. However, based on existing conditions, these weaknesses make full collection of principal highly improbable. • The primary source of repayment is gone, and there is considerable doubt as to the quality of the secondary source of repayment. • The possibility of loss is high but because of certain important pending factors which may strengthen the loan, loss classification is deferred until the exact status of repayment is known. Risk Grade 8: Loss Loans are considered uncollectible and of such little value that continuing to carry them as assets is not feasible. Loans will be classified Loss when it is neither practical nor desirable to defer writing off or reserving all or a portion of a basically worthless asset, even though partial recovery may be possible at some time in the future. The following table presents loans by credit grades. December 31, 2015 Pass Special Substandard Doubtful Total Commercial Owner occupied real estate $ 257,181 $ 4,954 $ 6,146 $ — $ 268,281 Non owner occupied real estate 320,216 585 5,598 — 326,399 Residential development 5,018 — — — 5,018 Development & Spec Land Loans 18,112 — 71 — 18,183 Commercial and industrial 180,581 693 3,637 — 184,911 Total commercial 781,108 6,232 15,452 — 802,792 Real estate Residential mortgage 408,937 — 5,987 — 414,924 Residential construction 19,501 — 250 — 19,751 Mortgage warehouse 144,692 — — — 144,692 Total real estate 573,130 — 6,237 — 579,367 Consumer Direct Installment 53,800 — 541 — 54,341 Direct Installment Purchased 153 — — — 153 Indirect Installment 150,895 — 628 — 151,523 Home Equity 154,895 — 2,269 — 157,164 Total Consumer 359,743 — 3,438 — 363,181 Total $ 1,713,981 $ 6,232 $ 25,127 $ — $ 1,745,340 Percentage of total loans 98.20 % 0.36 % 1.44 % 0.00 % December 31, 2014 Pass Special Substandard Doubtful Total Commercial Owner occupied real estate $ 215,874 $ 7,623 $ 4,883 $ — $ 228,380 Non owner occupied real estate 283,518 4,458 9,323 — 297,299 Residential development 2,027 — — — 2,027 Development & Spec Land Loans 12,018 79 — — 12,097 Commercial and industrial 128,589 1,799 2,868 — 133,256 Total commercial 642,026 13,959 17,074 — 673,059 Real estate Residential mortgage 236,893 — 5,628 — 242,521 Residential construction 11,239 — 266 — 11,505 Mortgage warehouse 129,156 — — — 129,156 Total real estate 377,288 — 5,894 — 383,182 Consumer Direct Installment 39,900 — 237 — 40,137 Direct Installment Purchased 219 — — — 219 Indirect Installment 141,264 — 604 — 141,868 Home Equity 135,155 — 3,852 — 139,007 Total Consumer 316,538 — 4,693 — 321,231 Total $ 1,335,853 $ 13,959 $ 27,661 $ — $ 1,377,472 Percentage of total loans 96.98 % 1.01 % 2.01 % 0.00 %

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 9 – Premises and Equipment December 31 December 31 Land $ 19,475 $ 16,550 Buildings and improvements 55,341 49,066 Furniture and equipment 15,702 13,795 Total cost 90,518 79,411 Accumulated depreciation (29,720 ) (26,950 ) Net premise and equipment $ 60,798 $ 52,461

Loan Servicing

Loan Servicing	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Loan Servicing	Note 10 – Loan Servicing Loans serviced for others are not included in the accompanying consolidated balance sheets. The unpaid principal balances of loans serviced for others totaled approximately $1,164.3 million and $1,035.5 million at December 31, 2015 and 2014. The aggregate fair value of capitalized mortgage servicing rights was approximately $10.8 million, $10.5 million, and $9.9 million at December 31, 2015, 2014 and 2013, compared to the carrying values of $8.9 million, $7.6 million and $7.0 million, respectively. The fair value of capitalized mortgage servicing rights was approximately $6.6 million on January 1, 2013. Comparable market values and a valuation model that calculates the present value of future cash flows were used to estimate fair value. For purposes of measuring impairment, risk characteristics including product type, investor type and interest rates, were used to stratify the originated mortgage servicing rights. December 31 December 31 December 31 Mortgage servicing rights Balances, January 1 $ 7,980 $ 7,428 $ 6,169 Servicing rights capitalized 2,974 2,280 2,535 Amortization of servicing rights (1,683 ) (1,728 ) (1,276 ) Balances, December 31 9,271 7,980 7,428 Impairment allowance Balances, January 1 (338 ) (389 ) (1,024 ) Additions (130 ) (95 ) (54 ) Reductions 71 146 689 Balances, December 31 (397 ) (338 ) (389 ) Mortgage servicing rights, net $ 8,874 $ 7,642 $ 7,039 During 2015, 2014 and 2013, the Bank recorded recovery and additional (impairment) of approximately $(59,000), $51,000 and $635,000, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Note 11 – Goodwill and Intangible Assets On July 1, 2015, the Peoples acquisition resulted in goodwill of $21.4 million. Additionally, on April 3, 2014, the Summit acquisition resulted in goodwill of $8.4 million. No impairment loss was recorded in 2015 or 2014. The Company tested goodwill for impairment during 2015 and 2014. In both valuations, the fair value exceeded the Company’s carrying value, therefore, it was concluded goodwill is not impaired. For additional details related to impairment testing, see the “Goodwill and Intangible Assets” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as Item 7 of this Annual Report on Form 10K. 2015 2014 Balance, January 1 $ 28,176 $ 19,748 Goodwill acquired 21,424 8,428 Balance, December 31 $ 49,600 $ 28,176 As a result of the acquisition of Alliance Bank Corporation in 2005, American Trust & Savings Bank in 2010, Heartland in 2012, Summit in 2014 and Peoples in 2015, the Company has recorded certain amortizable intangible assets related to core deposit intangibles. The core deposit intangible is being amortized over seven to ten years using an accelerated method. Amortizable intangible assets are summarized as follows: December 31, 2015 December 31, 2014 Gross Carrying Accumulated Gross Carrying Accumulated Amortizable intangible assets Core deposit intangible $ 12,920 $ (5,549 ) $ 8,526 $ (4,561 ) Amortization expense for intangible assets totaled $988,000, $880,000, and $760,000 for the years ended December 31, 2015, 2014 and 2013. Estimated amortization for the years ending December 31 is as follows: 2016 $ 1,106 2017 1,103 2018 1,101 2019 959 2020 662 Thereafter 2,440 $ 7,371

Deposits

Deposits	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposits	Note 12 – Deposits December 31 December 31 Noninterest-bearing demand deposits $ 335,955 $ 267,667 Interest-bearing demand deposits 706,739 606,609 Money market (variable rate) 231,956 179,142 Savings deposits 238,956 144,831 Certificates of deposit of $250,000 or more 67,697 137,147 Other certificates and time deposits 298,850 146,923 Total deposits $ 1,880,153 $ 1,482,319 Certificates and other time deposits for both retail and brokered maturing in years ending December 31 are as follows: Retail Brokered Total 2016 $ 158,389 $ 9,402 $ 167,791 2017 77,857 5,677 83,534 2018 40,422 1,250 41,672 2019 32,038 — 32,038 2020 24,840 — 24,840 Thereafter 11,018 5,654 16,672 $ 344,564 $ 21,983 $ 366,547

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowings	Note 13 – Borrowings December 31 December 31 Federal Home Loan Bank advances, variable and fixed rates ranging from 0.45% to 7.53%, due at various dates through November 15, 2024 $ 158,948 $ 116,473 Securities sold under agreements to repurchase 154,399 139,725 Federal funds purchased 136,000 95,000 Total borrowings $ 449,347 $ 351,198 The Federal Home Loan Bank advances are secured by first and second mortgage loans and mortgage warehouse loans totaling approximately $404.3 million. Advances are subject to restrictions or penalties in the event of prepayment. At December 31, 2015, the Bank had available approximately $253.2 million in credit lines with various money center banks, including the FHLB. Contractual maturities in years ending December 31 are as follows: 2016 $ 298,235 2017 48,948 2018 28,541 2019 56,777 2020 11,598 Thereafter 5,248 $ 449,347

Repurchase Agreements

Repurchase Agreements	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Repurchase Agreements	Note 14 – Repurchase Agreements The Company transfers various securities to customers in exchange for cash at the end of each business day and agrees to acquire the securities at the end of the next business day for the cash exchanged plus interest. The process is repeated at the end of each business day until the agreement is terminated. The securities underlying the agreement remain under the Bank’s control. The following table shows repurchase agreements accounted for as secured borrowings (in thousands): Remaining Contractual Maturity of the Agreements Overnight Up to one One to three Three to Five to ten Beyond ten Total Repurchase Agreements and repurchase-to-maturity transactions Repurchase Agreements $ 59,399 $ — $ 35,000 $ 60,000 $ — $ — $ 154,399 Securities lending transactions U.S. Treasury and federal agencies 5,468 — — — — — 5,468 Federal agency collateralized mortgage obligations 45,975 — 609 213 19,063 33,314 99,174 Federal agency mortgage-backed pools 14,068 — 235 310 15,881 35,641 66,135 Total 65,511 — 844 523 34,944 68,955 170,777 Total borrowings $ (6,112 ) $ — $ 34,156 $ 59,477 $ (34,944 ) $ (68,955 ) $ (16,378 ) Gross amount of recognized liabilities for repurchase agreements and securities lending $ 154,399 Securities sold under agreements to repurchase consist of obligations of the Bank to other parties. The obligations are secured by U.S. Treasury and federal agencies, federal agency collateralized mortgage obligations and federal agency mortgage-backed pools and such collateral is held in safekeeping by third parties. The maximum amount of outstanding agreements at any month end during 2015 and 2014 totaled $156.2 million and $144.3 million and the daily average of such agreements totaled $149.9 million and $140.9 million. The agreements at December 31, 2015, mature at various dates through September 13, 2020.

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Subordinated Debentures	Note 15 – Subordinated Debentures In October of 2004, Horizon formed Horizon Statutory Trust II (Trust II), a wholly owned statutory business trust. Trust II sold $10.3 million of Trust Preferred Capital Securities as a participant in a pooled trust preferred securities offering. The proceeds from the sale of the trust preferred securities were used by the trust to purchase an equivalent amount of subordinated debentures from Horizon. The junior subordinated debentures are the sole assets of Trust II and are fully and unconditionally guaranteed by Horizon. The junior subordinated debentures and the trust preferred securities pay interest and dividends on a quarterly basis. The junior subordinated debentures and the securities bear interest at a rate of 90-day LIBOR plus 1.95% (2.56% at December 31, 2015) and mature on October 21, 2034, and securities may be called at any quarterly interest payment date at par. Costs associated with the issuance of the securities totaling $17,500 were capitalized and were amortized to the October 31, 2009, first call date of the securities. In December of 2006, Horizon formed Horizon Bancorp Capital Trust III (Trust III), a wholly owned statutory business trust. Trust III sold $12.4 million of Trust Preferred Capital Securities as a participant in a pooled trust preferred securities offering. The proceeds from the sale of the trust preferred securities were used by the trust to purchase an equivalent amount of subordinated debentures from Horizon. The junior subordinated debentures are the sole assets of Trust III and are fully and unconditionally guaranteed by Horizon. The junior subordinated debentures and the trust preferred securities pay interest and dividends on a quarterly basis. The junior subordinated debentures and the securities bear interest at a rate of 90-day LIBOR plus 1.65% (2.26% at December 31, 2015) and mature on January 30, 2037, and securities may be called at any quarterly interest payment date at par. Costs associated with the issuance of the securities totaling $12,647 were capitalized and are being amortized to the first call date of the securities. The Company assumed additional debentures as the result of the acquisition of Alliance Bank Corporation in 2005. In June 2004, Alliance formed Alliance Financial Statutory Trust I a wholly owned business trust (Alliance Trust), to sell $5.2 million in trust preferred securities. The proceeds from the sale of the trust preferred securities were used by the trust to purchase an equivalent amount of subordinated debentures from Alliance. The junior subordinated debentures are the sole assets of Alliance Trust and are fully and unconditionally guaranteed by Horizon. The junior subordinated debentures and the trust preferred securities pay interest and dividends on a quarterly basis. The junior subordinated debentures and the securities bear interest at a rate of 90-day LIBOR plus 2.65% (3.26% at December 31, 2015) and mature in June 2034, and securities may be called at any quarterly interest payment date at par. The Company assumed additional debentures as the result of the American Trust & Savings Bank purchase and assumption in 2010. In March 2004, Am Tru Inc., the holding company for American Trust & Savings Bank, formed Am Tru Statutory Trust I a wholly owned business trust (Am Tru Trust), to sell $3.5 million in trust preferred securities. The proceeds from the sale of the trust preferred securities were used by the trust to purchase an equivalent amount of subordinated debentures from Am Tru Inc. The junior subordinated debentures are the sole assets of Am Tru Trust and are fully and unconditionally guaranteed by Horizon. The junior subordinated debentures and the trust preferred securities pay interest and dividends on a quarterly basis. The junior subordinated debentures and the securities bear interest at a rate of 90-day LIBOR plus 2.85% (3.46% at December 31, 2015) and mature in March 2034, and securities may be called at any quarterly interest payment date at par. The carrying value was $3.1 million, net of the remaining purchase discount, at December 31, 2015. The Company assumed additional debentures as the result of the Heartland merger in July 2012. In December 2006, Heartland formed Heartland (IN) Statutory Trust II a wholly owned business trust (Heartland Trust), to sell $3.0 million in trust preferred securities. The proceeds from the sale of the trust preferred securities were used by the trust to purchase an equivalent amount of subordinated debentures from Heartland. The junior subordinated debentures are the sole assets of Heartland Trust and are fully and unconditionally guaranteed by Horizon. The junior subordinated debentures and the trust preferred securities pay interest and dividends on a quarterly basis. The junior subordinated debentures and the securities bear interest at a rate of 90-day LIBOR plus 1.67% (2.28% at December 31, 2015) and mature in December 2036, and securities may be called at any quarterly interest payment date at par. The carrying value was $1.7 million, net of the remaining purchase discount, at December 31, 2015. The Trust Preferred Capital Securities, subject to certain limitations, are included in Tier 1 Capital for regulatory purposes. Dividends on the Trust Preferred Capital Securities are recorded as interest expense.

Employee Stock Ownership Plan

Employee Stock Ownership Plan	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Employee Stock Ownership Plan	Note 16 – Employee Stock Ownership Plan Effective January 1, 2007, Horizon converted its stock bonus plan to an employee stock ownership plan (“ESOP”). Prior to that date, Horizon maintained an employee stock bonus plan that covered substantially all employees. The stock bonus plan was noncontributory, and Horizon made matching contributions of amounts contributed by the employees to the Employee Thrift Plan and discretionary contributions. Prior to the establishment of the employee stock bonus plan, Horizon maintained an ESOP that was terminated in 1999. The prior ESOP accounts of active employees and the discretionary accounts of active employees remain in the new ESOP. The Matching contribution accounts under the stock bonus plan were transferred to the Employees Thrift Plan. The ESOP exists for the benefit of substantially all employees. Contributions to the ESOP are by Horizon and are determined by the Board of Directors at its discretion. The contributions may be made in the form of cash or common stock. Shares are allocated among participants each December 31 on the basis of each participant’s eligible compensation to total eligible compensation. Eligible compensation is limited to $265,000 for each participant. Dividends on shares held by the plan, at the discretion of each participant, may be distributed to an individual participant or left in the plan to purchase additional shares. Total cash contributions and expense recorded for the ESOP was $450,000 in 2015, $400,000 in 2014 and $475,000 in 2013. The ESOP, which is not leveraged, owns a total of 763,303 shares of Horizon’s stock or 6.4% of the outstanding shares.

Employee Thrift and Defined Ben

Employee Thrift and Defined Benefit Plan	12 Months Ended
	Dec. 31, 2015
Postemployment Benefits [Abstract]
Employee Thrift and Defined Benefit Plan	Note 17 – Employee Thrift and Defined Benefit Plan The Employee Thrift Plan (“Plan”) provides that all employees of Horizon with the requisite hours of service are eligible for the Plan. The Plan permits voluntary employee contributions and Horizon may make discretionary matching and profit sharing contributions. Each eligible employee is vested according to a schedule based upon years of service. Employee voluntary contributions are vested at all times. The Bank’s expense related to the Plan totaled approximately $848,000 in 2015, $633,000 in 2014 and $545,000 in 2013. The Plan owns a total of 319,994 shares of Horizon’s stock or 2.7% of the outstanding shares. The Company acquired a pension fund known as the Pentegra Defined Benefit Plan (Pentegra Plan) in the Peoples acquisition. Prior to August 1, 2007, the Peoples provided pension benefits for substantially all of its employees through its participation in the Pentegra Plan. Peoples chose to freeze the Pentegra Plan effective August 1, 2007. The trustees of the Financial Institutions Retirement Fund administer the Pentegra Plan, employer identification number 13-5645888 and plan number 333. This plan operates as a multi-employer plan for accounting purposes and as a multiple-employer plan under the Employee Retirement Income Security Act of 1974 and the Internal Revenue Code. There are no collective bargaining agreements in place that require contributions to the Pentegra Plan. The Pentegra Plan is a single plan under Internal Revenue Code 413(c) and, as a result, all of the assets stand behind all of the liabilities. The risks of participating in these multiemployer plans are different from single-employer plans in the following aspects: Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. If the Company chooses to stop participating in the multiemployer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability. There was no expense to the Company in 2015 for this Pentegra Plan. The Company intends on terminating this Pentegra Plan and as part of the acquisition Peoples recorded a $4.5 million withdrawal liability which carried over to the Company for the termination of the Pentegra Plan.

Income Tax

Income Tax	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax	Note 18 – Income Tax December 31 December 31 December 31 Income tax expense Currently payable Federal $ 5,270 $ 4,710 $ 3,900 State 241 (149 ) (88 ) Deferred 1,721 1,594 3,236 Total income tax expense $ 7,232 $ 6,155 $ 7,048 Reconciliation of federal statutory to actual tax expense Federal statutory income tax at 35% $ 9,724 $ 8,488 $ 9,424 Tax exempt interest (1,708 ) (1,628 ) (1,517 ) Tax exempt income (488 ) (366 ) (362 ) Other tax exempt income (199 ) (309 ) (342 ) Nondeductible and other (97 ) (30 ) (176 ) Effect of state income taxes — — 21 Actual tax expense $ 7,232 $ 6,155 $ 7,048 December 31 December 31 Assets Allowance for loan losses $ 5,329 $ 5,680 Net operating loss (from acquisitions) 1,679 3,509 Director and employee benefits 2,223 1,953 Unrealized loss on AFS securities and fair value hedge 711 588 Accrued Pension 1,725 — Other 1,029 596 Total assets 12,696 12,326 Liabilities Depreciation (2,180 ) (1,563 ) Difference in expense recognition — — State tax (192 ) (126 ) Federal Home Loan Bank stock dividends (343 ) (200 ) Difference in basis of intangible assets (2,938 ) (2,839 ) FHLB Penalty (123 ) (283 ) Other (1,671 ) (1,303 ) Total liabilities (7,447 ) (6,314 ) Net deferred tax asset $ 5,249 $ 6,012 As of December 31, 2015, the Company had approximately $17.3 million of state tax loss carryforward available to offset future franchise taxable income. Also, at December 31, 2015, the Company had approximately $1.6 million of federal loss carryforward available to offset future federal income tax. The state loss carryforward began to expire in 2024. The federal loss carryforward expires in 2029. Due to these losses being incurred by Peoples, Heartland and Summit prior to the acquisitions by Horizon, the annual losses which can be used are subject to an annual limitation. Management believes that the Company will be able to utilize the benefits recorded for both state and federal loss carryforwards within the allotted time periods. The Company files income tax returns in the U.S. federal jurisdiction. With a few exceptions, the Company is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2012.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 19 – Accumulated Other Comprehensive Income (Loss) The components of accumulated other comprehensive income (loss) included in capital are as follows: December 31 December 31 Unrealized gain on securities available for sale $ 920 $ 4,018 Unamortized gain on securities held to maturity, previously transferred from AFS 1,109 1,658 Unrealized loss on derivative instruments (3,142 ) (3,337 ) Tax effect 390 (818 ) Total accumulated other comprehensive income (loss) $ (723 ) $ 1,521

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Risk and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments, Off-Balance Sheet Risk and Contingencies	Note 20 – Commitments, Off-Balance Sheet Risk and Contingencies Because of the nature of its activities, Horizon is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations and cash flows of the Company. The Bank was required to have approximately $126,000 of cash on hand or on deposit with the Federal Reserve Bank to meet regulatory reserve and clearing balance requirements at December 31, 2015. These balances are included in cash and cash equivalents and do not earn interest. The Bank is a party to financial instruments with off-balance sheet risk in the ordinary course of business to meet financing needs of its customers. These financial instruments include commitments to make loans and standby letters of credit. The Bank’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to make loans and standby letters of credit is represented by the contractual amount of those instruments. The Bank follows the same credit policy to make such commitments as is followed for those loans recorded in the financial statements. At December 31, 2015 and 2014, commitments to make loans amounted to approximately $468.8 million and $408.6 million and commitments under outstanding standby letters of credit amounted to approximately $3.6 million and $3.9 million. Since many commitments to make loans and standby letters of credit expire without being used, the amount does not necessarily represent future cash advances. No losses are anticipated as a result of these transactions. Collateral obtained upon exercise of the commitment is determined using management’s credit evaluation.

Regulatory Capital

Regulatory Capital	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Regulatory Capital	Note 21 – Regulatory Capital Horizon and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies and are assigned to a capital category. Failure to meet the minimum regulatory capital requirements can initiate certain mandatory and possible additional discretionary actions by regulators, which if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective actions, the Company and Bank must meet specific capital guidelines involving quantitative measures of the Bank’s assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company and Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of total and Tier I capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier I capital (as defined) to average assets (as defined), or leverage ratio. For December 31, 2015, Basel III rules require the Company and Bank to maintain minimum amounts and ratios of common equity Tier I capital (as defined in the regulation) to risk-weighted assets (as defined). Additionally, under Basel III rules, the decision was made to opt-out of including accumulated other comprehensive income in regulatory capital. For December 31, 2014, regulatory capital ratios were calculated under Basel I rules. To be categorized as well capitalized, the Company and Bank must maintain minimum Total risk-based, Tier I risk-based, common equity Tier I risk-based (December 31, 2015) and Tier I leverage ratios as set forth in the table below. As of December 31, 2015 and December 31, 2014, the Company and Bank met all capital adequacy requirements to be considered well capitalized. There have been no conditions or events since the year ending of 2015 that management believes have changed the Bank’s classification as well capitalized. There is no threshold for well-capitalized status for bank holding companies. Horizon and the Bank’s actual and required capital ratios as of December 31, 2015 and 2014 were as follows: Actual Required For Capital 1 Well Capitalized Under Prompt 1 Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015 Total capital 1 Consolidated $ 264,452 13.99 % $ 151,223 8.00 % N/A N/A Bank 237,348 12.57 % 151,057 8.00 % $ 188,821 10.00 % Tier 1 capital 1 Consolidated 249,918 13.22 % 113,427 6.00 % N/A N/A Bank 222,814 11.80 % 113,295 6.00 % 151,060 8.00 % Common equity tier 1 capital 1 Consolidated 204,350 10.81 % 85,067 4.50 % N/A N/A Bank 222,814 11.80 % 84,971 4.50 % 122,737 6.50 % Tier 1 capital 1 Consolidated 249,918 9.82 % 101,800 4.00 % N/A N/A Bank 222,814 8.77 % 101,626 4.00 % 127,032 5.00 % As of December 31, 2014 Total capital 1 Consolidated $ 212,276 14.48 % $ 117,280 8.00 % N/A N/A Bank 192,604 13.08 % 117,801 8.00 % $ 147,251 10.00 % Tier 1 capital 1 Consolidated 195,775 13.35 % 58,659 4.00 % N/A N/A Bank 176,103 11.96 % 58,897 4.00 % 88,346 6.00 % Tier 1 capital 1 Consolidated 195,775 9.76 % 80,236 4.00 % N/A N/A Bank 176,103 8.80 % 80,047 4.00 % 100,059 5.00 % 1 As defined by regulatory agencies

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Note 22 – Share-Based Compensation On January 21, 2003, the Board of Directors adopted the Horizon Bancorp 2003 Omnibus Equity Incentive Plan (“2003 Plan”), which was approved by stockholders on May 8, 2003. Under the 2003 Plan, Horizon could issue up to 337,500 common shares, plus the number of shares that are tendered to or withheld by Horizon in connection with the exercise of options plus that number of shares that are purchased by Horizon with the cash proceeds received upon option exercises. The 2003 Plan limited the number of shares available to 337,500 for incentive stock options and to 168,750 for the grant of non-option awards. The shares available for issuance under the 2003 Plan could be divided among the various types of awards and among the participants as the Compensation Committee (“Committee”) determines. The Committee was authorized to grant any type of award to a participant that was consistent with the provisions of the 2003 Plan. Awards could consist of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, performance units, performance shares or any combination of these awards. The Committee determined the provisions, terms and conditions of each award. The restricted shares vest over a period of time established by the Committee at the time of each grant. Holders of restricted shares receive dividends and may vote the shares. The restricted shares are recorded at fair market value (on the date granted) as a separate component of stockholders’ equity. The cost of these shares is being amortized against earnings using the straight-line method over the vesting period. The options shares granted under the 2003 plan vest at a rate designated per the individual agreements. The restricted shares granted under the 2003 Plan vest at the end of each grant’s vesting period. On March 8, 2010, the Board of Directors adopted, and on May 6, 2010, the stockholders approved, an amendment to the 2003 Omnibus Equity Incentive Plan making an additional 393,750 common shares available for issuance. A summary of option activity under the 2003 Plan as of December 31, 2015, and changes during the year then ended, is presented below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 77,947 $ 11.35 Granted — — Exercised (33,347 ) 11.63 Forfeited (600 ) 16.46 Outstanding, end of year 44,000 11.07 4.02 $ 743,164 Exercisable, end of year 41,750 10.85 3.90 714,286 On June 18, 2013, the Board of Directors adopted the Horizon Bancorp 2013 Omnibus Equity Incentive Plan (“2013 Plan”), which was approved by the Company’s shareholders on May 8, 2014. Under the 2013 Plan, Horizon may issue up to 691,700 common shares, plus the number of shares that are tendered to or withheld by Horizon in connection with the exercise of options plus that number of shares that are purchased by Horizon with the cash proceeds received upon option exercises. The 2013 Plan limits the number of shares available to 100,000 for incentive stock options and to 400,000 for the grant of non-option awards. The shares available for issuance under the 2013 Plan may be divided among the various types of awards and among the participants as the Committee determines. The Committee is authorized to grant any type of award to a participant that is consistent with the provisions of the 2013 Plan. Awards may consist of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, performance units, performance shares or any combination of these awards. The Committee determines the provisions, terms and conditions of each award. The restricted shares can vest over a period of time established by the Committee at the time of each grant, but the restricted shares already granted under the 2013 Plan generally vest at the end of each grant’s vesting period. Holders of restricted shares receive dividends and may vote the shares. The restricted shares are recorded at fair market value (on the date granted) as a separate component of stockholders’ equity. The cost of these shares is being amortized against earnings using the straight-line method over the vesting period. The performance shares that are awarded become earned and vested based on the achievement of certain performance goals during a performance period as established by the Committee at the time of each grant. The performance goals are based on a comparison of the Company’s average performance over the performance period for the return on common equity, compounded annual growth rate of total assets, and return on average assets, all as relative to the average performance for publicly traded banks with total assets between $1 billion and $5 billion on the SNL Bank Index. Holders of performance share awards receive pass-through dividends but do not have any voting rights before the performance shares are earned and vested. The options shares granted under the 2013 Plan vest at a rate designated per the individual agreements The fair value of options granted is estimated on the date of the grant using an option-pricing model with the following weighted-average assumptions: December 31 2015 2014 2013 Dividend yields 2.35 % 2.01 % 1.98 % Volatility factors of expected market price of common stock 28.97 % 29.54 % 29.75 % Risk-free interest rates 2.10 % 2.66 % 2.16 % Expected life of options 8 years 8 years 8 years A summary of option activity under the 2013 Plan as of December 31, 2015, and changes during the year then ended, is presented below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 84,147 $ 21.24 Granted 39,944 23.83 Exercised (666 ) 20.24 Forfeited (2,334 ) 22.62 Outstanding, end of year 121,091 22.08 8.28 $ 712,506 Exercisable, end of year 41,412 20.90 7.71 292,263 The weighted average grant-date fair value of options granted during the years 2015, 2014 and 2013 was $6.14, $6.50 and $5.74. A summary of the status of Horizon’s non-vested restricted and performance shares as of December 31, 2015 is presented below: Shares Weighted Non-vested beginning of year 84,757 $ 15.18 Vested (25,059 ) 14.09 Granted 25,001 23.83 Forfeited (2,316 ) 16.64 Non-vested, end of year 82,383 18.19 Grants vest at the end of three, four or five years of continuous employment. Total compensation cost recognized in the income statement for option-based payment arrangements during 2015 was $288,000 and the related tax benefit recognized was approximately $101,000. Total compensation cost recognized in the income statement for option-based payment arrangements during 2014 and 2013 was $203,000 and $48,000 and the related tax benefit recognized was $71,000 and $19,000, respectively. Total compensation cost recognized in the income statement for restricted share and performance share based payment arrangements during 2015, 2014 and 2013 was $355,000, $363,000, and $288,000. The recognized tax benefit related thereto was approximately $124,000, $127,000, and $115,000 for the years ended December 31, 2015, 2014 and 2013. Cash received from option exercise under all share-based payment arrangements for the years ended December 31, 2015, 2014 and 2013 was $403,000, $122,000, and $136,000. The actual tax benefit realized for the tax deductions from option exercise of the share-based As of December 31, 2015, there was $983,000 of total unrecognized compensation cost related to all non-vested share-based compensation arrangements granted under all of the plans. That cost is expected to be recognized over a weighted-average period of 1.5 years.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 23 – Derivative Financial Instruments Cash Flow Hedges As a strategy to maintain acceptable levels of exposure to the risk of changes in future cash flow due to interest rate fluctuations, the Company entered into interest rate swap agreements for a portion of its floating rate debt. The agreements provide for the Company to receive interest from the counterparty at three month LIBOR and to pay interest to the counterparty at a weighted average fixed rate of 6.14% on a notional amount of $30.5 million at December 31, 2015 and $30.5 million at December 31, 2014. Under the agreements, the Company pays or receives the net interest amount monthly, with the monthly settlements included in interest expense. Management has designated the interest rate swap agreement as a cash flow hedging instrument. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. At December 31, 2015, the Company’s cash flow hedge was effective and is not expected to have a significant impact on the Company’s net income over the next 12 months. Fair Value Hedges Fair value hedges are intended to reduce the interest rate risk associated with the underlying hedged item. The Company enters into fixed rate loan agreements as part of its lending policy. To mitigate the risk of changes in fair value based on fluctuations in interest rates, the Company has entered into interest rate swap agreements on individual loans, converting the fixed rate loans to a variable rate. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative as well as the offsetting gain or loss on the hedged item attributable to the hedged risk are recognized in current earnings. At December 31, 2015, the Company’s fair value hedges were effective and are not expected to have a significant impact on the Company’s net income over the next 12 months. The change in fair value of both the hedge instruments and the underlying loan agreements are recorded as gains or losses in interest income. The fair value hedges are considered to be highly effective and any hedge ineffectiveness was deemed not material. The notional amounts of the loan agreements being hedged were $117.3 million at December 31, 2015 and $102.7 million at December 31, 2014. Other Derivative Instruments The Company enters into non-hedging derivatives in the form of mortgage loan forward sale commitments with investors and commitments to originate mortgage loans as part of its mortgage banking business. At December 31, 2015, the Company’s fair values of these derivatives were recorded and over the next 12 months are not expected to have a significant impact on the Company’s net income. The change in fair value of both the forward sale commitments and commitments to originate mortgage loans were recorded and the net gains or losses included in the Company’s gain on sale of loans. The following tables summarize the fair value of derivative financial instruments utilized by Horizon: Asset Derivatives December 31, 2015 Liability Derivatives December 31, 2015 Derivatives designated as hedging instruments (Unaudited) Balance Sheet Fair Value Balance Sheet Fair Value Interest rate contracts Loans $ — Other liabilities $ 1,782 Interest rate contracts Other Assets 1,782 Other liabilities 3,141 Total derivatives designated as hedging instruments 1,782 4,923 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 642 Other liabilities — Total derivatives not designated as hedging instruments 642 — Total derivatives $ 2,424 $ 4,923 Asset Derivatives December 31, 2014 Liability Derivatives December 31, 2014 Derivatives designated as hedging instruments (Unaudited) Balance Sheet Fair Value Balance Sheet Fair Value Interest rate contracts Loans $ — Other liabilities $ 1,208 Interest rate contracts Other Assets 1,208 Other liabilities 3,339 Total derivatives designated as hedging instruments 1,208 4,547 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 447 Other liabilities — Total derivatives not designated as hedging instruments 447 — Total derivatives $ 1,655 $ 4,547 The effect of the derivative instruments on the consolidated statement of income for the 12-month periods ended is as follows: Amount of Loss Recognized in Other Comprehensive Derivative in cash flow hedging relationship 2015 2014 2013 Interest rate contracts $ 127 $ (332 ) $ 1,734 FASB Accounting Standards Codification (“ASC”) Topic 820-10-20 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Topic 820-10-55 establishes a fair value hierarchy that emphasizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. Amount of Gain (Loss) Recognized on Derivative Location of gain (loss) Years Ended December 31 Derivative in fair value hedging relationship recognized on derivative 2015 2014 2013 Interest rate contracts Interest income - loans $ 574 $ 1,261 $ (2,267 ) Interest rate contracts Interest income - loans (574 ) (1,261 ) 2,267 Total $ — $ — $ — Amount of Gain (Loss) Recognized on Derivative Location of gain (loss) Years Ended December 31 Derivative not designated as hedging relationship recognized on derivative 2015 2014 2013 Mortgage contracts Other income - gain $ 195 $ 256 $ (667 )

Disclosures about fair value of

Disclosures about fair value of assets and liabilities	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Disclosures about fair value of assets and liabilities	Note 24 – Disclosures about fair value of assets and liabilities The Fair Value Measurements topic of the FASB ASC defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. There are three levels of inputs that may be used to measure fair value: Level 1 Quoted prices in active markets for identical assets or liabilities Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis and recognized in the accompanying consolidated financial statements, as well as the general classification of such instruments pursuant to the valuation hierarchy. There have been no significant changes in the valuation techniques during the period ended December 31, 2015. For assets classified within Level 3 of the fair value hierarchy, the process used to develop the reported fair value is described below. Available for sale securities When quoted market prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics or discounted cash flows. Level 2 securities include U.S. Treasury and federal agency securities, state and municipal securities, federal agency mortgage obligations and mortgage-backed pools, private-label mortgage-backed pools and corporate notes. Level 2 securities are valued by a third party pricing service commonly used in the banking industry utilizing observable inputs. Observable inputs include dealer quotes, market spreads, cash flow analysis, the U.S. Treasury yield curve, trade execution data, market consensus prepayment spreads and available credit information and the bond’s terms and conditions. The pricing provider utilizes evaluated pricing models that vary based on asset class. These models incorporate available market information including quoted prices of securities with similar characteristics and, because many fixed-income securities do not trade on a daily basis, apply available information through processes such as benchmark curves, benchmarking of like securities, sector grouping, and matrix pricing. In addition, model processes, such as an option adjusted spread model is used to develop prepayment and interest rate scenarios for securities with prepayment features. Hedged loans Certain fixed rate loans have been converted to variable rate loans by entering into interest rate swap agreements. The fair value of those fixed rate loans is based on discounting the estimated cash flows using interest rates determined by the respective interest rate swap agreement. Loans are classified within Level 2 of the valuation hierarchy based on the unobservable inputs used. Interest rate swap agreements The fair value of the Company’s interest rate swap agreements is estimated by a third party using inputs that are primarily unobservable including a yield curve, adjusted for liquidity and credit risk, contracted terms and discounted cash flow analysis, and therefore, are classified within Level 2 of the valuation hierarchy. The following table presents the fair value measurements of assets and liabilities recognized in the accompanying financial statements measured at fair value on a recurring basis and the level within the FASB ASC fair value hierarchy in which the fair value measurements fall at the following: Fair Value Quoted Prices in (Level 1) Significant Significant (Level 3) December 31, 2015 Available-for-sale securities U.S. Treasury and federal agencies $ 5,926 $ — $ 5,926 $ — State and municipal 75,095 — 75,095 — Federal agency collateralized mortgage obligations 156,203 — 156,203 — Federal agency mortgage-backed pools 207,704 — 207,704 — Corporate notes 54 — 54 — Total available-for-sale securities 444,982 — 444,982 — Hedged loans 115,472 — 115,472 — Forward sale commitments 642 — 642 — Interest rate swap agreements (4,923 ) — (4,923 ) — Commitments to originate loans — — — — December 31, 2014 Available-for-sale securities U.S. Treasury and federal agencies $ 26,823 $ — $ 26,823 $ — State and municipal 47,952 — 47,952 — Federal agency collateralized mortgage obligations 122,860 — 122,860 — Federal agency mortgage-backed pools 125,395 — 125,395 — Private labeled mortgage-backed pools 689 — 689 — Corporate notes 45 — 45 — Total available-for-sale securities 323,764 — 323,764 — Hedged loans 101,445 — 101,445 — Forward sale commitments 447 — 447 — Interest rate swap agreements (4,547 ) — (4,547 ) — Realized gains and losses included in net income for the periods are reported in the consolidated statements of income as follows: Non Interest Income Years Ended December 31 Total gains and losses from: 2015 2014 2013 Hedged loans $ 574 $ 1,261 $ (2,267 ) Fair value interest rate swap agreements (574 ) (1,261 ) 2,267 Derivative loan commitments 195 256 (667 ) $ 195 $ 256 $ (667 ) Certain other assets are measured at fair value on a nonrecurring basis in the ordinary course of business and are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment): Fair Value Quoted Prices in (Level 1) Significant Significant (Level 3) December 31, 2015 Impaired loans $ 6,803 $ — $ — $ 6,803 Mortgage servicing rights 8,874 — — 8,874 December 31, 2014 Impaired loans $ 9,464 $ — $ — $ 9,464 Mortgage servicing rights 7,642 — — 7,642 Impaired (collateral dependent): If the impaired loan is identified as collateral dependent, then the fair value method of measuring the amount of impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor to the value. Impaired loans that are collateral dependent are classified within Level 3 of the fair value hierarchy when impairment is determined using the fair value method. Mortgage Servicing Rights (MSRs): The following table presents qualitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at December 31, 2015. Fair Value at Valuation Unobservable Inputs Range (Weighted Impaired loans $ 6,803 Collateral based Discount to reflect current 10% - 15% (12%) Mortgage servicing rights $ 8,874 Discounted Discount rate, Constant 10% - 15% (12%), 4% - 7% 1% - 10% Fair Value at Valuation Unobservable Inputs Range (Weighted Impaired loans $ 9,464 Collateral based Discount to reflect current 10% - 15% (12%) Mortgage servicing rights $ 7,642 Discounted Discount rate, Constant 10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 25 – Fair Value of Financial Instruments The estimated fair value amounts of the Company’s financial instruments were determined using available market information, current pricing information applicable to Horizon and various valuation methodologies. Where market quotations were not available, considerable management judgment was involved in the determination of estimated fair values. Therefore, the estimated fair value of financial instruments shown below may not be representative of the amounts at which they could be exchanged in a current or future transaction. Due to the inherent uncertainties of expected cash flows of financial instruments, the use of alternate valuation assumptions and methods could have a significant effect on the estimated fair value amounts. The estimated fair values of financial instruments, as shown below, are not intended to reflect the estimated liquidation or market value of Horizon taken as a whole. The disclosed fair value estimates are limited to Horizon’s significant financial instruments at December 31, 2015 and December 31, 2014. These include financial instruments recognized as assets and liabilities on the consolidated balance sheet as well as certain off-balance sheet financial instruments. The estimated fair values shown below do not include any valuation of assets and liabilities which are not financial instruments as defined by the FASB ASC fair value hierarchy. The following methods and assumptions were used to estimate the fair value of each class of financial instrument: Cash and Due from Banks Held-to-Maturity Securities Loans Held for Sale Net Loans FHLB and FRB Stock Interest Receivable/Payable Deposits Borrowings Subordinated Debentures Commitments to Extend Credit and Standby Letters of Credit The following table presents estimated fair values of the Company’s financial instruments and the level within the fair value hierarchy in which the fair value measurements fall. December 31, 2015 Carrying Quoted Prices (Level 1) Significant Significant (Level 3) Assets Cash and due from banks $ 48,650 $ 48,650 $ — $ — Investment securities, held to maturity 187,629 — 193,703 — Loans held for sale 7,917 — — 7,917 Loans excluding loan level hedges, net 1,619,125 — — 1,703,506 Stock in FHLB and FRB 13,823 — 13,823 — Interest receivable 10,535 — 10,535 — Liabilities Non-interest bearing deposits $ 335,955 $ 335,955 $ — $ — Interest-bearing deposits 1,544,198 — 1,461,314 — Borrowings 449,347 — 441,547 — Subordinated debentures 32,797 — 32,996 — Interest payable 507 — 507 — December 31, 2014 Carrying Quoted Prices (Level 1) Significant Significant (Level 3) Assets Cash and due from banks $ 43,476 $ 43,476 $ — $ — Investment securities, held to maturity 165,767 — — 169,904 Loans held for sale 6,143 — — 6,143 Loans excluding loan level hedges, net 1,260,608 — — 1,295,133 Stock in FHLB and FRB 11,348 — 11,348 — Interest receivable 8,246 — 8,246 — Liabilities Non-interest bearing deposits $ 267,667 $ 267,667 $ — $ — Interest-bearing deposits 1,214,652 — 1,158,912 — Borrowings 351,198 — 348,597 — Subordinated debentures 32,642 — 32,669 — Interest payable 497 — 497 —

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 26 – Subsequent Events On February 1, 2016, Horizon Bancorp (“Horizon”) completed the redemption (the “Redemption”) of all 12,500 outstanding shares of Senior Non-Cumulative Perpetual Preferred Stock, Series B (the “SBLF Preferred Stock”) which were held by the U.S. Department of Treasury and issued pursuant to its Small Business Lending Fund (“SBLF”). The SBLF Preferred Stock was redeemed at its liquidation value of $1,000 per share, plus accrued dividends, for a total Redemption price of $12,510,416.67. Horizon funded the Redemption using cash on hand without borrowing and without a special dividend from its wholly owned banking subsidiary, Horizon Bank, N.A. Following the Redemption, Horizon does not have any shares of its Senior Non-Cumulative Perpetual Preferred Stock, Series B outstanding. The Redemption terminates Horizon’s participation in the SBLF. On February 4, 2016, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of Kosciusko Financial, Inc., an Indiana corporation (“Kosciusko”). Pursuant to the Merger Agreement, Kosciusko would merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and Farmers State Bank, a state chartered bank and wholly-owned subsidiary of Kosciusko, would merge with and into a wholly-owned subsidiary of Horizon, Horizon Bank, N.A. (“Horizon Bank”), with Horizon Bank as the surviving bank. The boards of directors of each of Horizon and Kosciusko have approved the Merger and the Merger Agreement. Subject to the approval of the Merger by Kosciusko shareholders, regulatory approvals and other closing conditions, the parties anticipate completing the Merger during the second quarter of 2016. In connection with the Merger, shareholders of Kosciusko will have the option to receive $81.75 per share in cash or 3.0122 shares of Horizon common stock for each share of Kosciusko’s common stock or a combination thereof, provided the overall shares exchanged consist of 65% stock and 35% cash. Based upon the February 3, 2016, closing price of $23.99 per share of Horizon common stock, the transaction has an implied valuation of approximately $22.5 million. Subject to certain terms and conditions, the board of directors of Kosciusko has agreed to recommend the approval and adoption of the Merger Agreement to the Kosciusko shareholders and will solicit proxies voting in favor of the Merger from Kosciusko’s shareholders. The Merger Agreement also provides for certain termination rights for both Horizon and Kosciusko, and further provides that upon termination of the Merger Agreement under certain circumstances, Kosciusko will be obligated to pay Horizon a termination fee. As of December 31, 2015, Kosciusko reported total assets of approximately $148.2 million, total deposits of approximately $122.8 million and total loans of approximately $106.1 million.

General Litigation

General Litigation	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
General Litigation	Note 27 – General Litigation The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results or operation and cash flows of the Company.

Condensed Financial Information

Condensed Financial Information (Parent Company Only)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information (Parent Company Only)	Note 28 – Condensed Financial Information (Parent Company Only) Presented below is condensed financial information as to financial position, results of operations and cash flows of Horizon Bancorp: Condensed Balance Sheets December 31 December 31 Assets Total cash and cash equivalents $ 26,507 $ 19,195 Investment in Bank 276,718 211,928 Other assets 3,392 2,758 Total assets $ 306,617 $ 233,881 Liabilities Subordinated debentures $ 32,797 $ 32,642 Other liabilities 6,988 6,825 Stockholders’ Equity 266,832 194,414 Total liabilities and stockholders’ equity $ 306,617 $ 233,881 Condensed Statements of Income Years Ended December 31 2015 2014 2013 Operating Income (Expense) Dividend income from Bank $ 30,470 $ 12,500 $ 7,500 Investment income 15 12 4 Other income 24 17 175 Interest expense (2,009 ) (2,009 ) (2,010 ) Employee benefit expense (1,093 ) (965 ) (811 ) Other expense 910 883 646 Income Before Undistributed Income of Subsidiaries 28,317 10,438 5,504 Undistributed Income of Subsidiaries (8,168 ) 6,814 13,144 Income Before Tax 20,149 17,252 18,648 Income Tax Benefit 400 849 1,228 Net Income 20,549 18,101 19,876 Preferred stock dividend (125 ) (133 ) (370 ) Net Income Available to Common Shareholders $ 20,424 $ 17,968 $ 19,506 Net Income $ 20,549 $ 18,101 $ 19,876 Other Comprehensive Income (Loss) Change in fair value of derivative instruments, net of taxes 127 (332 ) 1,734 Unrealized appreciation for the period on held-to-maturity securities, net of taxes (357 ) 1,078 — Unrealized appreciation (depreciation) on available-for-sale securities, net of taxes (1,891 ) 3,146 (12,320 ) Less: reclassification adjustment for realized gains included in net income, net of taxes (123 ) (642 ) (244 ) (2,244 ) 3,250 (10,830 ) Comprehensive Income $ 18,305 $ 21,351 $ 9,046 Condensed Statements of Cash Flows Years Ended December 31 2015 2014 2013 Operating Activities Net income $ 20,549 $ 18,101 $ 19,876 Items not requiring (providing) cash Equity in undistributed net income of subsidiaries 8,168 (6,814 ) (13,144 ) Change in Share based compensation 288 203 48 Amortization of unearned compensation 355 363 288 Other assets (634 ) 906 (167 ) Other liabilities (13 ) 1,377 97 Net cash provided by operating activities 28,713 14,136 6,998 Investing Activities Acquisition of Summit — (7,036 ) — Acquisition of Peoples (19,365 ) — — Net cash used in investing activities (19,365 ) (7,036 ) — Financing Activities Dividends paid on preferred shares (125 ) (133 ) (370 ) Dividends paid on common shares (6,216 ) (4,744 ) (3,655 ) Exercise of stock options 4,305 165 195 Net cash used in financing activities (2,036 ) (4,712 ) (3,830 ) Net Change in Cash and Cash Equivalents 7,312 2,388 3,168 Cash and Cash Equivalents at Beginning of Year 19,195 16,807 13,639 Cash and Cash Equivalents at End of Year $ 26,507 $ 19,195 $ 16,807

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Note 29 – Quarterly Results of Operations (Unaudited) The following is a summary of the quarterly consolidated results of operations: Three Months Ended 2015 March 31 June 30 September 30 December 31 Interest income $ 20,093 $ 21,127 $ 23,578 $ 23,790 Interest expense 3,207 3,277 3,802 3,568 Net interest income 16,886 17,850 19,776 20,222 Provision for loan losses 614 1,906 300 342 Gain on sale of securities 124 — — 65 Net income 5,358 4,728 4,288 6,175 Net income available to common shareholders $ 5,327 $ 4,697 $ 4,257 $ 6,144 Earnings per share: Basic $ 0.58 $ 0.51 $ 0.37 $ 0.51 Diluted 0.55 0.49 0.36 0.51 Average shares outstanding: Basic 9,216,011 9,240,005 11,605,976 11,937,247 Diluted 9,609,506 9,637,586 11,893,254 12,013,743 Three Months Ended 2014 March 31 June 30 September 30 December 31 Interest income $ 16,467 $ 20,122 $ 19,851 $ 19,765 Interest expense 3,195 3,334 3,451 3,242 Net interest income 13,272 16,788 16,400 16,523 Provision for loan losses — 339 1,741 978 Gain on sale of securities — — 988 — Net income 3,417 4,778 4,958 4,948 Net income available to common shareholders $ 3,386 $ 4,747 $ 4,918 $ 4,917 Earnings per share: Basic $ 0.39 $ 0.52 $ 0.53 $ 0.53 Diluted 0.38 0.50 0.51 0.51 Average shares outstanding: Basic 8,630,966 9,182,986 9,208,707 9,212,156 Diluted 9,021,786 9,560,939 9,588,332 9,628,240

Nature of Operations and Summ40

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business The Bank is a full-service commercial bank offering a broad range of commercial and retail banking and other services incident to banking along with a trust department that offers corporate and individual trust and agency services and investment management services. The Bank maintains 46 full service offices. The Bank has wholly owned direct and indirect subsidiaries: Horizon Investments, Inc. (“Horizon Investments”), Horizon Properties, Inc. (“Horizon Properties”), Horizon Insurance Services, Inc. (“Horizon Insurance”) and Horizon Grantor Trust. Horizon Investments manages the investment portfolio of the Bank. Horizon Properties manages the real estate investment trust. Horizon Insurance is used by the Company’s Wealth Management to sell certain insurance products. Horizon Grantor Trust holds title to certain company owned life insurance policies. Horizon conducts no business except that incident to its ownership of the subsidiaries. Horizon formed Horizon Bancorp Capital Trust II in 2004 (“Trust II”) and Horizon Bancorp Capital Trust III in 2006 (“Trust III”) for the purpose of participating in pooled trust preferred securities offerings. The Company assumed additional debentures as the result of the following acquisitions: Alliance Financial Corporation in 2005, which formed Alliance Financial Statutory Trust I (“Alliance Trust”); American Trust & Savings Bank in 2010, which formed Am Tru Statutory Trust I (“Am Tru Trust”); and Heartland Bancshares, Inc. in 2013, which formed Heartland (IN) Statutory Trust II (“Heartland Trust”). See Note 15 of the Consolidated Financial Statements for further discussion regarding these previously consolidated entities that are now reported separately. The business of Horizon is not seasonal to any material degree.
Basis of Reporting	Basis of Reporting
Use of Estimates	Use of Estimates Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, valuation of other real estate owned, goodwill and intangible assets, mortgage servicing rights, other-than-temporary impairments and fair values of financial instruments.
Fair Value Measurements	Fair Value Measurements As defined in codification, fair value is the price to sell an asset or transfer a liability in an orderly transaction between market participants. It represents an exit price at the measurement date. Market participants are buyers and sellers, who are independent, knowledgeable, and willing and able to transact in the principal (or most advantageous) market for the asset or liability being measured. Current market conditions, including imbalances between supply and demand, are considered in determining fair value. Horizon values its assets and liabilities in the principal market where it sells the particular asset or transfers the liability with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market for the asset or liability (i.e., the market where the asset could be sold or the liability transferred at a price that maximizes the amount to be received for the asset or minimizes the amount to be paid to transfer the liability). In measuring the fair value of an asset, Horizon assumes the highest and best use of the asset by a market participant to maximize the value of the asset, and does not consider the intended use of the asset. When measuring the fair value of a liability, Horizon assumes that the nonperformance risk associated with the liability is the same before and after the transfer. Nonperformance risk is the risk that an obligation will not be satisfied and encompasses not only Horizon’s own credit risk (i.e., the risk that Horizon will fail to meet its obligation), but also other risks such as settlement risk. Horizon considers the effect of its own credit risk on the fair value for any period in which fair value is measured. There are three acceptable valuation techniques that can be used to measure fair value: the market approach, the income approach and the cost approach. Selection of the appropriate technique for valuing a particular asset or liability takes into consideration the exit market, the nature of the asset or liability being valued, and how a market participant would value the same asset or liability. Ultimately, determination of the appropriate valuation method requires significant judgment, and sufficient knowledge and expertise are required to apply the valuation techniques. Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability using one of the three valuation techniques. Inputs can be observable or unobservable. Observable inputs are those assumptions which market participants would use in pricing the particular asset or liability. These inputs are based on market data and are obtained from a source independent of Horizon. Unobservable inputs are assumptions based on Horizon’s own information or estimate of assumptions used by market participants in pricing the asset or liability. Unobservable inputs are based on the best and most current information available on the measurement date. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy which gives the highest ranking to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest ranking to unobservable inputs (Level 3). Fair values for assets or liabilities classified as Level 2 are based on one or a combination of the following factors: (i) quoted prices for similar assets; (ii) observable inputs for the asset or liability, such as interest rates or yield curves; or (iii) inputs derived principally from or corroborated by observable market data. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company considers an input to be significant if it drives 10% or more of the total fair value of a particular asset or liability. Assets and liabilities are considered to be fair valued on a recurring basis if fair value is measured regularly (i.e., daily, weekly, monthly or quarterly). Recurring valuation occurs at a minimum on the measurement date. Assets and liabilities are considered to be fair valued on a nonrecurring basis if the fair value measurement of the instrument does not necessarily result in a change in the amount recorded on the balance sheet. Generally, nonrecurring valuation is the result of the application of other accounting pronouncements which require assets or liabilities to be assessed for impairment or recorded at the lower of cost or fair value. The fair value of assets or liabilities transferred in or out of Level 3 is measured on the transfer date, with any additional changes in fair value subsequent to the transfer considered to be realized or unrealized gains or losses.
Investment Securities Available for Sale	Investment Securities Available for Sale
Investment Securities Held to Maturity	Investment Securities Held to Maturity
Loans Held for Sale	Loans Held for Sale
Interest and Fees on Loans	Interest and Fees on Loans
Concentrations of Credit Risk	Concentrations of Credit Risk
Mortgage Warehouse Loans	Mortgage Warehouse Loans The transaction does not qualify as a sale under ASC 860, Transfers and Servicing and therefore is accounted for as a secured borrowing with pledge of collateral pursuant to the agreement with the mortgage company. When the individual loan is sold to the end investor by the mortgage company, the proceeds from the sale of the loan are received by Horizon and used to pay off the loan balance with Horizon along with any accrued interest and any related fees. The remaining balance from the sale is forwarded to the mortgage company. These individual loans typically are sold by the mortgage company within 30 days and are seldom held more than 90 days. Interest income is accrued during this period and collected at the time each loan is sold. Fee income for each loan sold is collected when the loan is sold and no costs are deferred due to the term between each loan funding and related payoff, which is typically less than 30 days. Based on the agreements with each mortgage company, at any time a mortgage company can reacquire from Horizon its outstanding loan balance on an individual mortgage and regain possession of the original note. Horizon also has the option to request that the mortgage company reacquire an individual mortgage. Should this occur, Horizon would return the original note and reassign the assignment of the mortgage to the mortgage company. Also, in the event that the end investor would not be able to honor the sales commitment and the mortgage company would not be able to reacquire its loan on an individual mortgage, Horizon would be able to exercise its rights under the agreement.
Allowance for Loan Losses	Allowance for Loan Losses The general allowance is calculated by applying loss factors to pools of outstanding loans. Loss factors are based on historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectability of the portfolio as of the evaluation date. Specific allowances are established in cases where management has identified conditions or circumstances related to a credit that management believes indicate the probability that a loss will be incurred in excess of the amount determined by the application of the formula allowance. The qualitative allowance is based upon management’s evaluation of various conditions, the effects of which are not directly measured in the determination of the general and specific allowances. The evaluation of the inherent loss with respect to these conditions is subject to a higher degree of uncertainty because they are not identified with specific credits. The conditions evaluated in connection with the qualitative allowance may include factors such as local, regional and national economic conditions and forecasts, concentrations of credit and changes in the composition of the portfolio.
Loan Impairment	Loan Impairment Loans are considered impaired if the borrower does not exhibit the ability to pay or the full principal or interest payments are not expected or made in accordance with the original terms of the loan. Impaired loans are measured and carried at the lower of cost or the present value of expected future cash flows discounted at the loan’s effective interest rate, at the loan’s observable market price or at the fair value of the collateral if the loan is collateral dependent. Smaller balance homogenous loans are evaluated for impairment in the aggregate. Such loans include residential first mortgage loans secured by one to four family residences, residential construction loans and automobile, home equity and second mortgages. Commercial loans and mortgage loans secured by other properties are evaluated individually for impairment.
Loans Acquired in Business Combinations	Loans Acquired in Business Combinations The expected cash flows of the acquired loan pools in excess of the fair values recorded is referred to as the accretable yield and is recognized in interest income over the remaining estimated lives of the loan pools. The Company continues to evaluate the fair value of the loans including cash flows expected to be collected. Increases in the Company’s cash flow expectation are recognized as increases to the accretable yield while decreases are recognized as impairments through the allowance for loan losses.
Premises and Equipment	Premises and Equipment
Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock	Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock
Mortgage Servicing Rights	Mortgage Servicing Rights 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. These variables change from quarter to quarter as market conditions and projected interest rates change, and may have an adverse impact on the value of the mortgage servicing right and may result in a reduction to noninterest income. Each class of separately recognized servicing assets subsequently measured using the amortization method are evaluated and measured for impairment. Impairment is determined by stratifying rights into tranches based on predominant characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the carrying amount of the servicing assets for that tranche. The valuation allowance is adjusted to reflect changes in the measurement of impairment after the initial measurement of impairment. Changes in valuation allowances are reported with mortgage servicing income net of impairment on the income statement. Fair value in excess of the carrying amount of servicing assets for that stratum is not recognized. Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income.
Intangible Assets	Intangible Assets
Bank Owned Life Insurance (BOLI)	Bank Owned Life Insurance (BOLI)
Income Taxes	Income Taxes Income Taxes Uncertain tax positions are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances and information available at the reporting date and is subject to management’s judgment. The Company recognizes interest and penalties on income taxes as a component of income tax expense. The Company files consolidated income tax returns with its subsidiaries.
Trust Assets and Income	Trust Assets and Income
Transfer of Financial Assets	Transfer of Financial Assets
Earnings per Common Share	Earnings per Common Share Years Ended December 31 2015 2014 2013 Basic earnings per share Net income $ 20,549 $ 18,101 $ 19,876 Less: Preferred stock dividends 125 133 370 Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Basic earnings per share $ 1.94 $ 1.98 $ 2.26 Diluted earnings per share Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Effect of dilutive securities: Warrants 220,316 315,679 303,970 Restricted stock 32,010 39,476 40,160 Stock options 35,586 38,268 37,503 Weighted average shares outstanding 10,798,208 9,454,125 9,000,963 Diluted earnings per share $ 1.89 $ 1.90 $ 2.17 At December 31, 2015 and 2014 there were 2,500 shares and at December 31, 2013 there were zero shares that were not included in the computation of diluted earnings per share because they were non-dilutive.
Dividend Restrictions	Dividend Restrictions
Consolidated Statements of Cash Flows	Consolidated Statements of Cash Flows
Comprehensive Income	Comprehensive Income
Share-Based Compensation	Share-Based Compensation
Reclassifications	Reclassifications
Recent Accounting Pronouncements	Recent Accounting Pronouncements FASB Accounting Standards Updates No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities The FASB has issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance makes targeted improvements to existing U.S. GAAP by: • Requiring equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; • Requiring public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; • Requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; • Eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; • Eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and • Requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The new guidance permits early adoption of the own credit provision. In addition, the new guidance permits early adoption of the provision that exempts private companies and not-for-profit organizations from having to disclose fair value information about financial instruments measured at amortized cost. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments The FASB has issued Accounting Standards Update (ASU) No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. U.S. GAAP currently requires that during the measurement period, the acquirer retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill. Those adjustments are required when new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts initially recognized or would have resulted in the recognition of additional assets or liabilities. The acquirer also must revise comparative information for prior periods presented in financial statements as needed, including revising depreciation, amortization, or other income effects as a result of changes made to provisional amounts. The amendments require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. The only disclosures required at transition should be the nature of and reason for the change in accounting principle. An entity should disclose that information in the first annual period of adoption and in the interim periods within the first annual period if there is a measurement-period adjustment during the first annual period in which the changes are effective. FASB Accounting Standards Update No. 2015-15, Interest—Imputation of Interest (Subtopic 835-30), Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements The FASB has issued Accounting Standards Update (ASU) No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, Given the absence of authoritative guidance within ASU 2015-03 for debt issuance costs related to line-of-credit arrangements, the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-03, Interest— Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs The FASB has issued Accounting Standards Update (ASU) No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments should be applied on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. These disclosures include the nature of and reason for the change in accounting principle, the transition method, a description of the prior-period information that has been retrospectively adjusted, and the effect of the change on the financial statement line items (i.e., debt issuance cost asset and the debt liability). For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements. FASB Accounting Standards Update No. 2015-01, Eliminating the Concept of Extraordinary Items The FASB has issued Accounting Standards Update (ASU) No. 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. This ASU eliminates from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. The entity also is required to disclose applicable income taxes and either present or disclose earnings-per-share data applicable to the extraordinary item. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Adoption of the ASU is not expected to have a significant effect on the Company’s consolidated financial statements.

Nature of Operations and Summ41

Nature of Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Computation of Basic and Diluted Earnings Per Share	The following table shows computation of basic and diluted earnings per share. Years Ended December 31 2015 2014 2013 Basic earnings per share Net income $ 20,549 $ 18,101 $ 19,876 Less: Preferred stock dividends 125 133 370 Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Basic earnings per share $ 1.94 $ 1.98 $ 2.26 Diluted earnings per share Net income available to common shareholders $ 20,424 $ 17,968 $ 19,506 Weighted average common shares outstanding 10,510,296 9,060,702 8,619,330 Effect of dilutive securities: Warrants 220,316 315,679 303,970 Restricted stock 32,010 39,476 40,160 Stock options 35,586 38,268 37,503 Weighted average shares outstanding 10,798,208 9,454,125 9,000,963 Diluted earnings per share $ 1.89 $ 1.90 $ 2.17

Acquisition (Tables)

Acquisition (Tables)	12 Months Ended
	Dec. 31, 2015
Peoples Bancorp Inc [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on management’s preliminary valuation of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on estimates and assumptions that are subject to change, the final purchase price for the Peoples acquisition is allocated as follows: ASSETS Cash and due from banks $ 205,054 Investment securities, held to maturity 2,038 Commercial 67,435 Residential mortgage 137,331 Consumer 19,593 Total loans 224,359 Premises and equipment, net 5,524 FRB and FHLB stock 2,743 Goodwill 21,424 Core deposit intangible 4,394 Interest receivable 1,279 Cash value of life insurance 13,898 Other assets 4,364 Total assets purchased $ 485,077 Common shares issued $ 55,506 Cash paid 22,641 Total estimated purchase price $ 78,147 LIABILITIES Deposits Non-interest bearing $ 28,251 NOW accounts 65,771 Savings and money market 125,176 Certificates of deposits 131,889 Total deposits 351,087 Borrowings 48,884 Interest payable 21 Other liabilities 6,938 Total liabilities assumed $ 406,930
Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30	The following table details the acquired loans that are accounted for in accordance with ASC 310-30 as of July 1, 2015. Contractually required principal and interest at acquisition $ 5,730 Contractual cash flows not expected to be collected (nonaccretable differences) 715 Expected cash flows at acquisition 5,015 Interest component of expected cash flows (accretable discount) 647 Fair value of acquired loans accounted for under ASC 310-30 $ 4,368
Pro Forma Result of Comparable Prior Reporting Period	The following schedule includes pro forma results for the periods ended December 31, 2015 and December 31, 2014 as if the Peoples and Peoples FSB acquisitions had occurred as of the beginning of the comparable prior reporting period. December 31, December 31, 2015 2014 Summary of Operations: Net Interest Income $ 80,688 $ 75,442 Provision for Loan Losses 3,222 3,443 Net Interest Income after Provision for Loan Losses 77,466 71,999 Non-interest Income 32,295 29,928 Non-Interest Expense 80,489 74,010 Income before Income Taxes 29,272 27,917 Income Tax Expense 7,359 6,560 Net Income 21,913 21,357 Net Income Available to Common Shareholders $ 21,788 $ 21,372 Basic Earnings Per Share $ 1.90 $ 1.87 Diluted Earnings Per Share $ 1.85 $ 1.81
Summit [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on management’s preliminary valuation of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on estimates and assumptions that are subject to change, the preliminary purchase price for the Summit acquisition is allocated as follows: ASSETS Cash and due from banks $ 15,161 Commercial 70,441 Residential mortgage 43,448 Consumer 10,192 Total loans 124,081 Premises and equipment, net 2,548 FRB and FHLB stock 2,136 Goodwill 8,428 Core deposit intangible 822 Interest receivable 347 Cash value of life insurance 2,185 Other assets 2,877 Total assets purchased $ 158,585 LIABILITIES Deposits Non-interest bearing $ 27,274 NOW accounts 16,332 Savings and money market 35,045 Certificates of deposits 42,368 Total deposits 121,019 Borrowings 16,990 Interest payable 52 Other liabilities 599 Total liabilities assumed $ 138,660
Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30	The following table details the acquired loans that are accounted for in accordance with ASC 310-30 as of April 3, 2014. Contractually required principal and interest at acquisition $ 14,460 Contractual cash flows not expected to be collected (nonaccretable differences) 3,146 Expected cash flows at acquisition 11,314 Interest component of expected cash flows (accretable discount) 1,688 Fair value of acquired loans accounted for under ASC 310-30 $ 9,626

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Fair Value of Securities	The fair value of securities is as follows: December 31, 2015 Amortized Gross Gross Fair Value Available for sale U.S. Treasury and federal agencies $ 5,940 $ 3 $ (17 ) $ 5,926 State and municipal 73,829 1,299 (33 ) 75,095 Federal agency collateralized mortgage obligations 157,291 567 (1,655 ) 156,203 Federal agency mortgage-backed pools 206,970 2,080 (1,346 ) 207,704 Corporate notes 32 22 — 54 Total available for sale investment securities $ 444,062 $ 3,971 $ (3,051 ) $ 444,982 Held to maturity U.S. Treasury and federal agencies $ 5,859 $ 93 $ — $ 5,952 State and municipal 146,331 5,375 (253 ) 151,453 Federal agency collateralized mortgage obligations 9,051 27 (124 ) 8,954 Federal agency mortgage-backed pools 26,388 1,141 (185 ) 27,344 Total held to maturity investment securities $ 187,629 $ 6,636 $ (562 ) $ 193,703 December 31, 2014 Amortized Gross Gross Fair Value Available for sale U.S. Treasury and federal agencies $ 26,996 $ 56 $ (229 ) $ 26,823 State and municipal 46,535 1,462 (45 ) 47,952 Federal agency collateralized mortgage obligations 122,930 975 (1,045 ) 122,860 Federal agency mortgage-backed pools 122,583 3,172 (360 ) 125,395 Private labeled mortgage-backed pools 670 19 — 689 Corporate notes 32 13 — 45 Total available for sale investment securities $ 319,746 $ 5,697 $ (1,679 ) $ 323,764 Held to maturity U.S. Treasury and federal agencies $ 9,804 $ 82 $ — $ 9,886 State and municipal 129,595 3,398 (106 ) 132,887 Federal agency collateralized mortgage obligations 4,039 35 (1 ) 4,073 Federal agency mortgage-backed pools 22,329 729 — 23,058 Total held to maturity investment securities $ 165,767 $ 4,244 $ (107 ) $ 169,904
Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity	The amortized cost and fair value of securities available for sale and held-to-maturity at December 31, 2015 and December 31, 2014, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. December 31, 2015 December 31, 2014 Amortized Fair Amortized Fair Cost Value Cost Value Available for sale Within one year $ 7,192 $ 7,232 $ 6,098 $ 6,169 One to five years 38,197 38,894 44,720 45,093 Five to ten years 16,807 17,152 16,147 16,768 After ten years 17,605 17,797 6,598 6,790 79,801 81,075 73,563 74,820 Federal agency collateralized mortgage obligations 157,291 156,203 122,930 122,860 Federal agency mortgage-backed pools 206,970 207,704 122,583 125,395 Private labeled mortgage-backed pools — — 670 689 Total available for sale investment securities $ 444,062 $ 444,982 $ 319,746 $ 323,764 Held to maturity Within one year $ — $ — $ — $ — One to five years 17,815 18,403 592 593 Five to ten years 106,167 110,026 99,225 101,323 After ten years 28,208 28,976 39,582 40,857 152,190 157,404 139,399 142,773 Federal agency collateralized mortgage obligations 9,051 8,954 4,039 4,073 Federal agency mortgage-backed pools 26,388 27,344 22,329 23,058 Total held to maturity investment securities $ 187,629 $ 193,703 $ 165,767 $ 169,904
Gross Unrealized Losses and Fair Value of Company's Investments	The following table shows the gross unrealized losses and the fair value of the Company’s investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position. Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Value Losses Value Losses Value Losses U.S. Treasury and federal agencies $ 5,468 $ (17 ) $ — $ — $ 5,468 $ (17 ) State and municipal 17,353 (280 ) 446 (6 ) 17,799 (286 ) Federal agency collateralized mortgage obligations 89,459 (1,123 ) 25,428 (655 ) 114,887 (1,779 ) Federal agency mortgage-backed pools 113,244 (1,212 ) 16,506 (319 ) 129,750 (1,531 ) Total temporarily impaired securities $ 225,524 $ (2,632 ) $ 42,380 $ (980 ) $ 267,904 $ (3,613 ) Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2014 Value Losses Value Losses Value Losses U.S. Treasury and federal agencies $ 2,993 $ (7 ) $ 20,762 $ (222 ) $ 23,755 $ (229 ) State and municipal 10,287 (121 ) 2,050 (30 ) 12,337 (151 ) Federal agency collateralized mortgage obligations 15,013 (88 ) 39,801 (957 ) 54,814 (1,045 ) Federal agency mortgage-backed pools 5,993 (9 ) 28,044 (351 ) 34,037 (360 ) Total temporarily impaired securities $ 34,286 $ (225 ) $ 90,657 $ (1,560 ) $ 124,943 $ (1,785 )
Sales of Securities Available for Sale	Information regarding security proceeds, gross gains and gross losses are presented below. Years ended December 31 2015 2014 2013 Sales of securities available for sale Proceeds $ 43,051 $ 45,228 $ 23,853 Gross gains 254 988 382 Gross losses (65 ) — (8 )

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2015
Amounts of Loans	December 31 December 31 2015 2014 Commercial Working capital and equipment $ 381,245 $ 300,940 Real estate, including agriculture 391,668 343,455 Tax exempt 8,674 8,595 Other 23,408 21,324 Total 804,995 674,314 Real estate 1–4 family 433,015 250,799 Other 4,129 3,826 Total 437,144 254,625 Consumer Auto 168,397 154,538 Recreation 5,365 5,673 Real estate/home improvement 47,015 38,288 Home equity 127,113 112,426 Unsecured 4,120 3,613 Other 10,290 5,921 Total 362,300 320,459 Mortgage warehouse 144,692 129,156 Total loans 1,749,131 1,378,554 Allowance for loan losses (14,534 ) (16,501 ) Loans, net $ 1,734,597 $ 1,362,053
Recorded Investment of Individual Loan Categories	The following table shows the recorded investment of individual loan categories. December 31, 2015 Loan Interest Due Deferred Recorded Owner occupied real estate $ 268,281 $ 613 $ 1,328 $ 270,222 Non owner occupied real estate 326,399 306 497 327,202 Residential spec homes 5,018 9 17 5,044 Development & spec land loans 18,183 33 26 18,242 Commercial and industrial 184,911 1,246 335 186,492 Total commercial 802,792 2,207 2,203 807,202 Residential mortgage 414,924 1,275 2,470 418,669 Residential construction 19,751 34 — 19,785 Mortgage warehouse 144,692 480 — 145,172 Total real estate 579,367 1,789 2,470 583,626 Direct installment 54,341 168 (359 ) 54,150 Direct installment purchased 153 — — 153 Indirect installment 151,523 323 — 151,846 Home equity 157,164 628 (522 ) 157,270 Total consumer 363,181 1,119 (881 ) 363,419 Total loans 1,745,340 5,115 3,792 1,754,247 Allowance for loan losses (14,534 ) — — (14,534 ) Net loans $ 1,730,806 $ 5,115 $ 3,792 $ 1,739,713 December 31, 2014 Loan Interest Due Deferred Recorded Owner occupied real estate $ 228,380 $ 385 $ 680 $ 229,445 Non owner occupied real estate 297,299 309 506 298,114 Residential spec homes 2,027 2 — 2,029 Development & spec land loans 12,097 28 30 12,155 Commercial and industrial 133,256 859 39 134,154 Total commercial 673,059 1,583 1,255 675,897 Residential mortgage 242,521 737 599 243,857 Residential construction 11,505 21 — 11,526 Mortgage warehouse 129,156 480 — 129,636 Total real estate 383,182 1,238 599 385,019 Direct installment 40,137 129 (375 ) 39,891 Direct installment purchased 219 — — 219 Indirect installment 141,868 314 (163 ) 142,019 Home equity 139,007 568 (234 ) 139,341 Total consumer 321,231 1,011 (772 ) 321,470 Total loans 1,377,472 3,832 1,082 1,382,386 Allowance for loan losses (16,501 ) — — (16,501 ) Net loans $ 1,360,971 $ 3,832 $ 1,082 $ 1,365,885
Loans Purchased With Evidence Of Credit Deterioration [Member]
Amounts of Loans	The carrying amounts of those loans included in the balance sheet amounts of loans receivable are as follows: December 31 December 31 December 31 December 31 2015 2015 2015 2015 Heartland Summit Peoples Total Commercial $ 1,633 $ 5,567 $ 1,061 $ 8,261 Real estate 693 1,216 179 2,088 Consumer 6 35 — 41 Outstanding balance $ 2,332 $ 6,818 $ 1,240 $ 10,390 Carrying amount, net of allowance of $63 $ 10,327 December 31 December 31 December 31 December 31 2014 2014 2014 2014 Heartland Summit Peoples Total Commercial $ 5,492 $ 7,725 $ — $ 13,217 Real estate 900 1,458 — 2,358 Consumer 8 43 — 51 Outstanding balance $ 6,400 $ 9,226 $ — $ 15,626 Carrying amount, net of allowance of $359 $ 15,267

Accounting for Certain Loans 45

Accounting for Certain Loans Acquired in a Transfer (Tables)	12 Months Ended
	Dec. 31, 2015
Loans Purchased With Evidence Of Credit Deterioration [Member]
Accretable Yield or Income Expected to be Collected	Accretable yield, or income expected to be collected are as follows: Twelve Months Ended December 31, 2015 Heartland Summit Peoples Total Balance at January 1 $ 2,400 $ 1,268 $ — $ 3,668 Additions — — 647 647 Accretion (327 ) (315 ) (83 ) (725 ) Reclassification from nonaccretable difference — — — — Disposals (1,278 ) (245 ) (9 ) (1,532 ) Balance at December 31 $ 795 $ 708 $ 555 $ 2,058 Twelve Months Ended December 31, 2014 Heartland Summit Peoples Total Balance at January 1 $ 3,185 $ — $ — $ 3,185 Additions — 1,688 — 1,688 Accretion (557 ) (332 ) — (889 ) Reclassification from nonaccretable difference — — — — Disposals (228 ) (88 ) — (316 ) Balance at December 31 $ 2,400 $ 1,268 $ — $ 3,668

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Allowance for Loan Losses	The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over the prior one to five years. Management believes the five-year historical loss experience methodology is appropriate in the current economic environment, as it captures loss rates that are comparable to the current period being analyzed. The actual allowance for loan loss activity is provided below. December 31 December 31 December 31 2015 2014 2013 Balance at beginning of the period $ 16,501 $ 15,992 $ 18,270 Loans charged-off: Commercial Owner occupied real estate 2,208 40 138 Non owner occupied real estate 556 136 937 Residential development — — — Development & Spec Land Loans — 173 182 Commercial and industrial 673 1,453 1,275 Total commercial 3,437 1,802 2,532 Real estate Residential mortgage 288 328 1,055 Residential construction — — — Mortgage warehouse — — — Total real estate 288 328 1,055 Consumer Direct Installment 367 250 333 Direct Installment Purchased — — — Indirect Installment 1,081 1,233 1,178 Home Equity 926 516 1,152 Total consumer 2,374 1,999 2,663 Total loans charged-off 6,099 4,129 6,250 Recoveries of loans previously charged-off: Commercial Owner occupied real estate 104 13 65 Non owner occupied real estate 1 210 71 Residential development — — — Development & Spec Land Loans 35 55 — Commercial and industrial 52 495 532 Total commercial 192 773 668 Real estate Residential mortgage 69 21 114 Residential construction — — — Mortgage warehouse — — — Total real estate 69 21 114 Consumer Direct Installment 106 67 488 Direct Installment Purchased — — — Indirect Installment 489 560 658 Home Equity 114 159 124 Total consumer 709 786 1,270 Total loan recoveries 970 1,580 2,052 Net loans charged-off (recovered) 5,129 2,549 4,198 Provision charged to operating expense Commercial 2,531 2,277 756 Real estate 62 (1,153 ) 1,132 Consumer 569 1,934 32 Total provision charged to operating expense 3,162 3,058 1,920 Balance at the end of the period $ 14,534 $ 16,501 $ 15,992
Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment analysis: December 31, 2015 Commercial Real Estate Mortgage Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 202 $ — $ — $ — $ 202 Collectively evaluated for impairment 6,739 2,476 1,007 3,856 14,078 Loans acquired with deteriorated credit quality 254 — — — 254 Total ending allowance balance $ 7,195 $ 2,476 $ 1,007 $ 3,856 $ 14,534 Loans: Individually evaluated for impairment $ 7,019 $ — $ — $ — $ 7,019 Collectively evaluated for impairment 798,454 438,454 145,172 363,419 1,745,499 Loans acquired with deteriorated credit quality 1,729 — — — 1,729 Total ending loans balance $ 807,202 $ 438,454 $ 145,172 $ 363,419 $ 1,754,247 December 31, 2014 Commercial Real Estate Mortgage Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,589 $ — $ — $ — $ 1,589 Collectively evaluated for impairment 5,827 2,508 1,132 4,951 14,418 Loans acquired with deteriorated credit quality 494 — — — 494 Total ending allowance balance $ 7,910 $ 2,508 $ 1,132 $ 4,951 $ 16,501 Loans: Individually evaluated for impairment $ 11,055 $ — $ — $ — $ 11,055 Collectively evaluated for impairment 664,251 255,383 129,636 321,470 1,370,740 Loans acquired with deteriorated credit quality 591 — — — 591 Total ending loans balance $ 675,897 $ 255,383 $ 129,636 $ 321,470 $ 1,382,386

Non-performing Assets and Imp47

Non-performing Assets and Impaired Loans (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Non-accrual, Loans Past Due Over 90 Days Still on Accrual, and Troubled Debt Restructured ("TDRs") by Class of Loans	The following table presents the nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured (“TDRs”) by class of loans: December 31, 2015 Non-accrual Loans Past Due Over 90 Days Still Accruing Non- Performing Total Non- Commercial Owner occupied real estate $ 1,749 $ — $ — $ — $ 1,749 Non owner occupied real estate 3,034 — 1,915 60 5,009 Residential development — — — — — Development & Spec Land Loans 71 — — — 71 Commercial and industrial 176 — — — 176 Total commercial 5,030 — 1,915 60 7,005 Real estate Residential mortgage 4,354 1 824 808 5,987 Residential construction — — 250 — 250 Mortgage warehouse — — — — — Total real estate 4,354 1 1,074 808 6,237 Consumer Direct Installment 541 — — — 541 Direct Installment Purchased — — — — — Indirect Installment 601 27 — — 628 Home Equity 1,736 — 183 350 2,269 Total Consumer 2,878 27 183 350 3,438 Total $ 12,262 $ 28 $ 3,172 $ 1,218 $ 16,680 December 31, 2014 Non-accrual Loans Past Days Still Accruing Non- Performing Total Non- Commercial Owner occupied real estate $ 1,773 $ — $ — $ 44 $ 1,817 Non owner occupied real estate 7,439 — 217 566 8,222 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 812 — 1,004 — 1,816 Total commercial 10,024 — 1,221 610 11,855 Real estate Residential mortgage 2,297 40 765 2,526 5,628 Residential construction — — 266 — 266 Mortgage warehouse — — — — — Total real estate 2,297 40 1,031 2,526 5,894 Consumer Direct Installment 227 10 — — 237 Direct Installment Purchased — — — — — Indirect Installment 557 47 — — 604 Home Equity 2,207 18 391 1,236 3,852 Total Consumer 2,991 75 391 1,236 4,693 Total $ 15,312 $ 115 $ 2,643 $ 4,372 $ 22,442
Commercial Loans Individually Evaluated for Impairment by Class of Loans	The following table presents commercial loans individually evaluated for impairment by class of loans: Twelve Months Ending December 31, 2015 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,340 $ 1,339 $ — $ 1,001 $ 22 Non owner occupied real estate 4,938 4,953 — 5,417 8 Residential development — — — — — Development & Spec Land Loans 71 71 — 6 3 Commercial and industrial 79 79 — 275 4 Total commercial 6,428 6,442 — 6,699 37 With an allowance recorded Commercial Owner occupied real estate 410 410 105 243 8 Non owner occupied real estate 70 70 32 6 13 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 97 97 65 162 — Total commercial 577 577 202 411 21 Total $ 7,005 $ 7,019 $ 202 $ 7,110 $ 58 Twelve Months Ending December 31, 2014 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,169 $ 1,170 $ — $ 645 $ 65 Non owner occupied real estate 1,193 1,194 — 1,341 51 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 854 854 — 357 27 Total commercial 3,216 3,218 — 2,343 143 With an allowance recorded Commercial Owner occupied real estate 422 422 165 141 16 Non owner occupied real estate 6,453 6,453 744 1,995 208 Residential development — — — — — Development & Spec Land Loans — — — — — Commercial and industrial 962 962 680 798 12 Total commercial 7,837 7,837 1,589 2,934 236 Total $ 11,053 $ 11,055 $ 1,589 $ 5,277 $ 379 Twelve Months Ending December 31, 2013 Unpaid Recorded Allowance For Average Cash/Accrual With no recorded allowance Commercial Owner occupied real estate $ 1,293 $ 1,296 $ — $ 1,845 $ 68 Non owner occupied real estate 3,521 3,525 — 2,963 172 Residential development — — — — — Development & Spec Land Loans 23 23 — 25 — Commercial and industrial 390 405 — 712 — Total commercial 5,227 5,249 — 5,545 240 With an allowance recorded Commercial Owner occupied real estate — — — — — Non owner occupied real estate 403 403 202 485 — Residential development — — — — — Development & Spec Land Loans 159 159 48 166 — Commercial and industrial 1,637 1,637 1,062 1,140 31 Total commercial 2,199 2,199 1,312 1,791 31 Total $ 7,426 $ 7,448 $ 1,312 $ 7,336 $ 271
Payment Status by Class of Loan	The following table presents the payment status by class of loans: December 31, 2015 30 - 59 Days Past Due 60 - 89 Days Greater than 90 Total Past Due Loans Not Past Total Commercial Owner occupied real estate $ 481 $ 18 $ — $ 499 $ 267,782 $ 268,281 Non owner occupied real estate 49 — — 49 326,350 326,399 Residential development — — — — 5,018 5,018 Development & Spec Land Loans — — — — 18,183 18,183 Commercial and industrial 32 — — 32 184,879 184,911 Total commercial 562 18 — 580 802,212 802,792 Real estate Residential mortgage 1,121 344 1 1,466 413,458 414,924 Residential construction — — — — 19,751 19,751 Mortgage warehouse — — — — 144,692 144,692 Total real estate 1,121 344 1 1,466 577,901 579,367 Consumer Direct Installment 106 10 — 116 54,225 54,341 Direct Installment Purchased — — — — 153 153 Indirect Installment 1,186 268 27 1,481 150,042 151,523 Home Equity 1,193 203 — 1,396 155,768 157,164 Total consumer 2,485 481 27 2,993 360,188 363,181 Total $ 4,168 $ 843 $ 28 $ 5,039 $ 1,740,301 $ 1,745,340 Percentage of total loans 0.24 % 0.05 % 0.00 % 0.29 % 99.71 % December 31, 2014 30 - 59 Days 60 - 89 Days Greater than 90 Total Past Due Loans Not Past Total Commercial Owner occupied real estate $ 103 $ 645 $ — $ 748 $ 227,632 $ 228,380 Non owner occupied real estate 413 — — 413 296,886 297,299 Residential development — — — — 2,027 2,027 Development & Spec Land Loans — — — — 12,097 12,097 Commercial and industrial 19 1 — 20 133,236 133,256 Total commercial 535 646 — 1,181 671,878 673,059 Real estate Residential mortgage 1,033 193 40 1,266 241,255 242,521 Residential construction — — — — 11,505 11,505 Mortgage warehouse — — — — 129,156 129,156 Total real estate 1,033 193 40 1,266 381,916 383,182 Consumer Direct Installment 113 4 10 127 40,010 40,137 Direct Installment Purchased — — — — 219 219 Indirect Installment 1,042 243 47 1,332 140,536 141,868 Home Equity 1,084 189 18 1,291 137,716 139,007 Total consumer 2,239 436 75 2,750 318,481 321,231 Total $ 3,807 $ 1,275 $ 115 $ 5,197 $ 1,372,275 $ 1,377,472 Percentage of total loans 0.28 % 0.09 % 0.01 % 0.38 % 99.62 %
Loans by Credit Grades	The following table presents loans by credit grades. December 31, 2015 Pass Special Substandard Doubtful Total Commercial Owner occupied real estate $ 257,181 $ 4,954 $ 6,146 $ — $ 268,281 Non owner occupied real estate 320,216 585 5,598 — 326,399 Residential development 5,018 — — — 5,018 Development & Spec Land Loans 18,112 — 71 — 18,183 Commercial and industrial 180,581 693 3,637 — 184,911 Total commercial 781,108 6,232 15,452 — 802,792 Real estate Residential mortgage 408,937 — 5,987 — 414,924 Residential construction 19,501 — 250 — 19,751 Mortgage warehouse 144,692 — — — 144,692 Total real estate 573,130 — 6,237 — 579,367 Consumer Direct Installment 53,800 — 541 — 54,341 Direct Installment Purchased 153 — — — 153 Indirect Installment 150,895 — 628 — 151,523 Home Equity 154,895 — 2,269 — 157,164 Total Consumer 359,743 — 3,438 — 363,181 Total $ 1,713,981 $ 6,232 $ 25,127 $ — $ 1,745,340 Percentage of total loans 98.20 % 0.36 % 1.44 % 0.00 % December 31, 2014 Pass Special Substandard Doubtful Total Commercial Owner occupied real estate $ 215,874 $ 7,623 $ 4,883 $ — $ 228,380 Non owner occupied real estate 283,518 4,458 9,323 — 297,299 Residential development 2,027 — — — 2,027 Development & Spec Land Loans 12,018 79 — — 12,097 Commercial and industrial 128,589 1,799 2,868 — 133,256 Total commercial 642,026 13,959 17,074 — 673,059 Real estate Residential mortgage 236,893 — 5,628 — 242,521 Residential construction 11,239 — 266 — 11,505 Mortgage warehouse 129,156 — — — 129,156 Total real estate 377,288 — 5,894 — 383,182 Consumer Direct Installment 39,900 — 237 — 40,137 Direct Installment Purchased 219 — — — 219 Indirect Installment 141,264 — 604 — 141,868 Home Equity 135,155 — 3,852 — 139,007 Total Consumer 316,538 — 4,693 — 321,231 Total $ 1,335,853 $ 13,959 $ 27,661 $ — $ 1,377,472 Percentage of total loans 96.98 % 1.01 % 2.01 % 0.00 %

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	December 31 December 31 Land $ 19,475 $ 16,550 Buildings and improvements 55,341 49,066 Furniture and equipment 15,702 13,795 Total cost 90,518 79,411 Accumulated depreciation (29,720 ) (26,950 ) Net premise and equipment $ 60,798 $ 52,461

Loan Servicing (Tables)

Loan Servicing (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Originated Mortgage Servicing Rights	December 31 December 31 December 31 Mortgage servicing rights Balances, January 1 $ 7,980 $ 7,428 $ 6,169 Servicing rights capitalized 2,974 2,280 2,535 Amortization of servicing rights (1,683 ) (1,728 ) (1,276 ) Balances, December 31 9,271 7,980 7,428 Impairment allowance Balances, January 1 (338 ) (389 ) (1,024 ) Additions (130 ) (95 ) (54 ) Reductions 71 146 689 Balances, December 31 (397 ) (338 ) (389 ) Mortgage servicing rights, net $ 8,874 $ 7,642 $ 7,039

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	“Goodwill and Intangible Assets” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as Item 7 of this Annual Report on Form 10K. 2015 2014 Balance, January 1 $ 28,176 $ 19,748 Goodwill acquired 21,424 8,428 Balance, December 31 $ 49,600 $ 28,176
Amortizable Intangible Assets	Amortizable intangible assets are summarized as follows: December 31, 2015 December 31, 2014 Gross Carrying Accumulated Gross Carrying Accumulated Amortizable intangible assets Core deposit intangible $ 12,920 $ (5,549 ) $ 8,526 $ (4,561 )
Estimated Amortization	Estimated amortization for the years ending December 31 is as follows: 2016 $ 1,106 2017 1,103 2018 1,101 2019 959 2020 662 Thereafter 2,440 $ 7,371

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposits	December 31 December 31 Noninterest-bearing demand deposits $ 335,955 $ 267,667 Interest-bearing demand deposits 706,739 606,609 Money market (variable rate) 231,956 179,142 Savings deposits 238,956 144,831 Certificates of deposit of $250,000 or more 67,697 137,147 Other certificates and time deposits 298,850 146,923 Total deposits $ 1,880,153 $ 1,482,319
Certificates and Other Time Deposits for Both Retail and Brokered	Certificates and other time deposits for both retail and brokered maturing in years ending December 31 are as follows: Retail Brokered Total 2016 $ 158,389 $ 9,402 $ 167,791 2017 77,857 5,677 83,534 2018 40,422 1,250 41,672 2019 32,038 — 32,038 2020 24,840 — 24,840 Thereafter 11,018 5,654 16,672 $ 344,564 $ 21,983 $ 366,547

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowings	December 31 December 31 Federal Home Loan Bank advances, variable and fixed rates ranging from 0.45% to 7.53%, due at various dates through November 15, 2024 $ 158,948 $ 116,473 Securities sold under agreements to repurchase 154,399 139,725 Federal funds purchased 136,000 95,000 Total borrowings $ 449,347 $ 351,198
Contractual Maturities	Contractual maturities in years ending December 31 are as follows: 2016 $ 298,235 2017 48,948 2018 28,541 2019 56,777 2020 11,598 Thereafter 5,248 $ 449,347

Repurchase Agreements (Tables)

Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Summary of Repurchase Agreements Accounted as Secured Borrowings	The following table shows repurchase agreements accounted for as secured borrowings (in thousands): Remaining Contractual Maturity of the Agreements Overnight Up to one One to three Three to Five to ten Beyond ten Total Repurchase Agreements and repurchase-to-maturity transactions Repurchase Agreements $ 59,399 $ — $ 35,000 $ 60,000 $ — $ — $ 154,399 Securities lending transactions U.S. Treasury and federal agencies 5,468 — — — — — 5,468 Federal agency collateralized mortgage obligations 45,975 — 609 213 19,063 33,314 99,174 Federal agency mortgage-backed pools 14,068 — 235 310 15,881 35,641 66,135 Total 65,511 — 844 523 34,944 68,955 170,777 Total borrowings $ (6,112 ) $ — $ 34,156 $ 59,477 $ (34,944 ) $ (68,955 ) $ (16,378 ) Gross amount of recognized liabilities for repurchase agreements and securities lending $ 154,399

Income Tax (Tables)

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Reconciliation of Income Taxes	December 31 December 31 December 31 Income tax expense Currently payable Federal $ 5,270 $ 4,710 $ 3,900 State 241 (149 ) (88 ) Deferred 1,721 1,594 3,236 Total income tax expense $ 7,232 $ 6,155 $ 7,048 Reconciliation of federal statutory to actual tax expense Federal statutory income tax at 35% $ 9,724 $ 8,488 $ 9,424 Tax exempt interest (1,708 ) (1,628 ) (1,517 ) Tax exempt income (488 ) (366 ) (362 ) Other tax exempt income (199 ) (309 ) (342 ) Nondeductible and other (97 ) (30 ) (176 ) Effect of state income taxes — — 21 Actual tax expense $ 7,232 $ 6,155 $ 7,048
Reconciliation of Deferred Tax Assets & Liabilities	December 31 December 31 Assets Allowance for loan losses $ 5,329 $ 5,680 Net operating loss (from acquisitions) 1,679 3,509 Director and employee benefits 2,223 1,953 Unrealized loss on AFS securities and fair value hedge 711 588 Accrued Pension 1,725 — Other 1,029 596 Total assets 12,696 12,326 Liabilities Depreciation (2,180 ) (1,563 ) Difference in expense recognition — — State tax (192 ) (126 ) Federal Home Loan Bank stock dividends (343 ) (200 ) Difference in basis of intangible assets (2,938 ) (2,839 ) FHLB Penalty (123 ) (283 ) Other (1,671 ) (1,303 ) Total liabilities (7,447 ) (6,314 ) Net deferred tax asset $ 5,249 $ 6,012

Accumulated Other Comprehensi55

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss) included in capital are as follows: December 31 December 31 Unrealized gain on securities available for sale $ 920 $ 4,018 Unamortized gain on securities held to maturity, previously transferred from AFS 1,109 1,658 Unrealized loss on derivative instruments (3,142 ) (3,337 ) Tax effect 390 (818 ) Total accumulated other comprehensive income (loss) $ (723 ) $ 1,521

Regulatory Capital (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Summary of Regulatory Capital Requirement	Horizon and the Bank’s actual and required capital ratios as of December 31, 2015 and 2014 were as follows: Actual Required For Capital 1 Well Capitalized Under Prompt 1 Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015 Total capital 1 Consolidated $ 264,452 13.99 % $ 151,223 8.00 % N/A N/A Bank 237,348 12.57 % 151,057 8.00 % $ 188,821 10.00 % Tier 1 capital 1 Consolidated 249,918 13.22 % 113,427 6.00 % N/A N/A Bank 222,814 11.80 % 113,295 6.00 % 151,060 8.00 % Common equity tier 1 capital 1 Consolidated 204,350 10.81 % 85,067 4.50 % N/A N/A Bank 222,814 11.80 % 84,971 4.50 % 122,737 6.50 % Tier 1 capital 1 Consolidated 249,918 9.82 % 101,800 4.00 % N/A N/A Bank 222,814 8.77 % 101,626 4.00 % 127,032 5.00 % As of December 31, 2014 Total capital 1 Consolidated $ 212,276 14.48 % $ 117,280 8.00 % N/A N/A Bank 192,604 13.08 % 117,801 8.00 % $ 147,251 10.00 % Tier 1 capital 1 Consolidated 195,775 13.35 % 58,659 4.00 % N/A N/A Bank 176,103 11.96 % 58,897 4.00 % 88,346 6.00 % Tier 1 capital 1 Consolidated 195,775 9.76 % 80,236 4.00 % N/A N/A Bank 176,103 8.80 % 80,047 4.00 % 100,059 5.00 % 1 As defined by regulatory agencies

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value of Options Granted	The fair value of options granted is estimated on the date of the grant using an option-pricing model with the following weighted-average assumptions: December 31 2015 2014 2013 Dividend yields 2.35 % 2.01 % 1.98 % Volatility factors of expected market price of common stock 28.97 % 29.54 % 29.75 % Risk-free interest rates 2.10 % 2.66 % 2.16 % Expected life of options 8 years 8 years 8 years
Summary of Status of Non-vested, Restricted and Performance Shares	A summary of the status of Horizon’s non-vested restricted and performance shares as of December 31, 2015 is presented below: Shares Weighted Non-vested beginning of year 84,757 $ 15.18 Vested (25,059 ) 14.09 Granted 25,001 23.83 Forfeited (2,316 ) 16.64 Non-vested, end of year 82,383 18.19
Stock Options 2003 Plan [Member]
Summary of Option Activity under 2003 Plan	A summary of option activity under the 2003 Plan as of December 31, 2015, and changes during the year then ended, is presented below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 77,947 $ 11.35 Granted — — Exercised (33,347 ) 11.63 Forfeited (600 ) 16.46 Outstanding, end of year 44,000 11.07 4.02 $ 743,164 Exercisable, end of year 41,750 10.85 3.90 714,286
Stock Options 2013 Plan [Member]
Summary of Option Activity under 2003 Plan	A summary of option activity under the 2013 Plan as of December 31, 2015, and changes during the year then ended, is presented below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 84,147 $ 21.24 Granted 39,944 23.83 Exercised (666 ) 20.24 Forfeited (2,334 ) 22.62 Outstanding, end of year 121,091 22.08 8.28 $ 712,506 Exercisable, end of year 41,412 20.90 7.71 292,263

Derivative Financial Instrume58

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Financial Instruments	The following tables summarize the fair value of derivative financial instruments utilized by Horizon: Asset Derivatives December 31, 2015 Liability Derivatives December 31, 2015 Derivatives designated as hedging instruments (Unaudited) Balance Sheet Fair Value Balance Sheet Fair Value Interest rate contracts Loans $ — Other liabilities $ 1,782 Interest rate contracts Other Assets 1,782 Other liabilities 3,141 Total derivatives designated as hedging instruments 1,782 4,923 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 642 Other liabilities — Total derivatives not designated as hedging instruments 642 — Total derivatives $ 2,424 $ 4,923 Asset Derivatives December 31, 2014 Liability Derivatives December 31, 2014 Derivatives designated as hedging instruments (Unaudited) Balance Sheet Fair Value Balance Sheet Fair Value Interest rate contracts Loans $ — Other liabilities $ 1,208 Interest rate contracts Other Assets 1,208 Other liabilities 3,339 Total derivatives designated as hedging instruments 1,208 4,547 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 447 Other liabilities — Total derivatives not designated as hedging instruments 447 — Total derivatives $ 1,655 $ 4,547
Effect of Derivative Instruments on Condensed Consolidated Statement of Income Derivative in Cash Flow Hedging Relationship	The effect of the derivative instruments on the consolidated statement of income for the 12-month periods ended is as follows: Amount of Loss Recognized in Other Comprehensive Derivative in cash flow hedging relationship 2015 2014 2013 Interest rate contracts $ 127 $ (332 ) $ 1,734
Effect of Derivative Instruments on Consolidated Statement of Income Derivative in Fair Value Hedging Relationship	Amount of Gain (Loss) Recognized on Derivative Location of gain (loss) Years Ended December 31 Derivative in fair value hedging relationship recognized on derivative 2015 2014 2013 Interest rate contracts Interest income - loans $ 574 $ 1,261 $ (2,267 ) Interest rate contracts Interest income - loans (574 ) (1,261 ) 2,267 Total $ — $ — $ — Amount of Gain (Loss) Recognized on Derivative Location of gain (loss) Years Ended December 31 Derivative not designated as hedging relationship recognized on derivative 2015 2014 2013 Mortgage contracts Other income - gain $ 195 $ 256 $ (667 )

Disclosures about fair value 59

Disclosures about fair value of assets and liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Fair Value Measurements of Assets and Liabilities Recognized on a Recurring Basis	The following table presents the fair value measurements of assets and liabilities recognized in the accompanying financial statements measured at fair value on a recurring basis and the level within the FASB ASC fair value hierarchy in which the fair value measurements fall at the following: Fair Value Quoted Prices in (Level 1) Significant Significant (Level 3) December 31, 2015 Available-for-sale securities U.S. Treasury and federal agencies $ 5,926 $ — $ 5,926 $ — State and municipal 75,095 — 75,095 — Federal agency collateralized mortgage obligations 156,203 — 156,203 — Federal agency mortgage-backed pools 207,704 — 207,704 — Corporate notes 54 — 54 — Total available-for-sale securities 444,982 — 444,982 — Hedged loans 115,472 — 115,472 — Forward sale commitments 642 — 642 — Interest rate swap agreements (4,923 ) — (4,923 ) — Commitments to originate loans — — — — December 31, 2014 Available-for-sale securities U.S. Treasury and federal agencies $ 26,823 $ — $ 26,823 $ — State and municipal 47,952 — 47,952 — Federal agency collateralized mortgage obligations 122,860 — 122,860 — Federal agency mortgage-backed pools 125,395 — 125,395 — Private labeled mortgage-backed pools 689 — 689 — Corporate notes 45 — 45 — Total available-for-sale securities 323,764 — 323,764 — Hedged loans 101,445 — 101,445 — Forward sale commitments 447 — 447 — Interest rate swap agreements (4,547 ) — (4,547 ) —
Realized Gains and Losses Included in Net Income for Periods in Consolidated Statements of Income	Realized gains and losses included in net income for the periods are reported in the consolidated statements of income as follows: Non Interest Income Years Ended December 31 Total gains and losses from: 2015 2014 2013 Hedged loans $ 574 $ 1,261 $ (2,267 ) Fair value interest rate swap agreements (574 ) (1,261 ) 2,267 Derivative loan commitments 195 256 (667 ) $ 195 $ 256 $ (667 )
Other Assets Measured at Fair Value on Nonrecurring Basis	Certain other assets are measured at fair value on a nonrecurring basis in the ordinary course of business and are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment): Fair Value Quoted Prices in (Level 1) Significant Significant (Level 3) December 31, 2015 Impaired loans $ 6,803 $ — $ — $ 6,803 Mortgage servicing rights 8,874 — — 8,874 December 31, 2014 Impaired loans $ 9,464 $ — $ — $ 9,464 Mortgage servicing rights 7,642 — — 7,642
Qualitative Information About Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements, Other than Goodwill	The following table presents qualitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at December 31, 2015. Fair Value at Valuation Unobservable Inputs Range (Weighted Impaired loans $ 6,803 Collateral based Discount to reflect current 10% - 15% (12%) Mortgage servicing rights $ 8,874 Discounted Discount rate, Constant 10% - 15% (12%), 4% - 7% 1% - 10% Fair Value at Valuation Unobservable Inputs Range (Weighted Impaired loans $ 9,464 Collateral based Discount to reflect current 10% - 15% (12%) Mortgage servicing rights $ 7,642 Discounted Discount rate, Constant 10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)

Fair Value of Financial Instr60

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Summary of Estimated Fair Values of Financial Instruments	The following table presents estimated fair values of the Company’s financial instruments and the level within the fair value hierarchy in which the fair value measurements fall. December 31, 2015 Carrying Quoted Prices (Level 1) Significant Significant (Level 3) Assets Cash and due from banks $ 48,650 $ 48,650 $ — $ — Investment securities, held to maturity 187,629 — 193,703 — Loans held for sale 7,917 — — 7,917 Loans excluding loan level hedges, net 1,619,125 — — 1,703,506 Stock in FHLB and FRB 13,823 — 13,823 — Interest receivable 10,535 — 10,535 — Liabilities Non-interest bearing deposits $ 335,955 $ 335,955 $ — $ — Interest-bearing deposits 1,544,198 — 1,461,314 — Borrowings 449,347 — 441,547 — Subordinated debentures 32,797 — 32,996 — Interest payable 507 — 507 — December 31, 2014 Carrying Quoted Prices (Level 1) Significant Significant (Level 3) Assets Cash and due from banks $ 43,476 $ 43,476 $ — $ — Investment securities, held to maturity 165,767 — — 169,904 Loans held for sale 6,143 — — 6,143 Loans excluding loan level hedges, net 1,260,608 — — 1,295,133 Stock in FHLB and FRB 11,348 — 11,348 — Interest receivable 8,246 — 8,246 — Liabilities Non-interest bearing deposits $ 267,667 $ 267,667 $ — $ — Interest-bearing deposits 1,214,652 — 1,158,912 — Borrowings 351,198 — 348,597 — Subordinated debentures 32,642 — 32,669 — Interest payable 497 — 497 —

Condensed Financial Informati61

Condensed Financial Information (Parent Company Only) (Tables)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets December 31 December 31 Assets Total cash and cash equivalents $ 26,507 $ 19,195 Investment in Bank 276,718 211,928 Other assets 3,392 2,758 Total assets $ 306,617 $ 233,881 Liabilities Subordinated debentures $ 32,797 $ 32,642 Other liabilities 6,988 6,825 Stockholders’ Equity 266,832 194,414 Total liabilities and stockholders’ equity $ 306,617 $ 233,881
Condensed Statements of Income	Condensed Statements of Income Years Ended December 31 2015 2014 2013 Operating Income (Expense) Dividend income from Bank $ 30,470 $ 12,500 $ 7,500 Investment income 15 12 4 Other income 24 17 175 Interest expense (2,009 ) (2,009 ) (2,010 ) Employee benefit expense (1,093 ) (965 ) (811 ) Other expense 910 883 646 Income Before Undistributed Income of Subsidiaries 28,317 10,438 5,504 Undistributed Income of Subsidiaries (8,168 ) 6,814 13,144 Income Before Tax 20,149 17,252 18,648 Income Tax Benefit 400 849 1,228 Net Income 20,549 18,101 19,876 Preferred stock dividend (125 ) (133 ) (370 ) Net Income Available to Common Shareholders $ 20,424 $ 17,968 $ 19,506 Net Income $ 20,549 $ 18,101 $ 19,876 Other Comprehensive Income (Loss) Change in fair value of derivative instruments, net of taxes 127 (332 ) 1,734 Unrealized appreciation for the period on held-to-maturity securities, net of taxes (357 ) 1,078 — Unrealized appreciation (depreciation) on available-for-sale securities, net of taxes (1,891 ) 3,146 (12,320 ) Less: reclassification adjustment for realized gains included in net income, net of taxes (123 ) (642 ) (244 ) (2,244 ) 3,250 (10,830 ) Comprehensive Income $ 18,305 $ 21,351 $ 9,046
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows Years Ended December 31 2015 2014 2013 Operating Activities Net income $ 20,549 $ 18,101 $ 19,876 Items not requiring (providing) cash Equity in undistributed net income of subsidiaries 8,168 (6,814 ) (13,144 ) Change in Share based compensation 288 203 48 Amortization of unearned compensation 355 363 288 Other assets (634 ) 906 (167 ) Other liabilities (13 ) 1,377 97 Net cash provided by operating activities 28,713 14,136 6,998 Investing Activities Acquisition of Summit — (7,036 ) — Acquisition of Peoples (19,365 ) — — Net cash used in investing activities (19,365 ) (7,036 ) — Financing Activities Dividends paid on preferred shares (125 ) (133 ) (370 ) Dividends paid on common shares (6,216 ) (4,744 ) (3,655 ) Exercise of stock options 4,305 165 195 Net cash used in financing activities (2,036 ) (4,712 ) (3,830 ) Net Change in Cash and Cash Equivalents 7,312 2,388 3,168 Cash and Cash Equivalents at Beginning of Year 19,195 16,807 13,639 Cash and Cash Equivalents at End of Year $ 26,507 $ 19,195 $ 16,807

Quarterly Results of Operatio62

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Consolidated Results of Operations	The following is a summary of the quarterly consolidated results of operations: Three Months Ended 2015 March 31 June 30 September 30 December 31 Interest income $ 20,093 $ 21,127 $ 23,578 $ 23,790 Interest expense 3,207 3,277 3,802 3,568 Net interest income 16,886 17,850 19,776 20,222 Provision for loan losses 614 1,906 300 342 Gain on sale of securities 124 — — 65 Net income 5,358 4,728 4,288 6,175 Net income available to common shareholders $ 5,327 $ 4,697 $ 4,257 $ 6,144 Earnings per share: Basic $ 0.58 $ 0.51 $ 0.37 $ 0.51 Diluted 0.55 0.49 0.36 0.51 Average shares outstanding: Basic 9,216,011 9,240,005 11,605,976 11,937,247 Diluted 9,609,506 9,637,586 11,893,254 12,013,743 Three Months Ended 2014 March 31 June 30 September 30 December 31 Interest income $ 16,467 $ 20,122 $ 19,851 $ 19,765 Interest expense 3,195 3,334 3,451 3,242 Net interest income 13,272 16,788 16,400 16,523 Provision for loan losses — 339 1,741 978 Gain on sale of securities — — 988 — Net income 3,417 4,778 4,958 4,948 Net income available to common shareholders $ 3,386 $ 4,747 $ 4,918 $ 4,917 Earnings per share: Basic $ 0.39 $ 0.52 $ 0.53 $ 0.53 Diluted 0.38 0.50 0.51 0.51 Average shares outstanding: Basic 8,630,966 9,182,986 9,208,707 9,212,156 Diluted 9,021,786 9,560,939 9,588,332 9,628,240

Nature of Operations and Summ63

Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)Valuation_TechniquesFacilitiesBusinessshares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares
Schedule Of Accounting Policies [Line Items]
Full service facilities maintained by bank | Facilities	46
Number of business conduct | Business	0
Number of valuation techniques to measure fair value | Valuation_Techniques	3
Factor considered to be significant for fair value measurement	10.00%
Accrual of interest discontinued description	Principal or interest is past due 90 days or more, and the loan is not well secured or in the process of collection, or when serious doubt exists as to the collectability of a loan, the accrual of interest is discontinued.
Commercial loans as a percentage of total loan	46.00%
Residential real estate loans as a percentage of total loan	25.00%
Installment loans as a percentage of total loan	20.00%
Mortgage warehouse loans as a percentage of total loan	8.00%
Period in which loan sold by mortgage company	30 days
Minimum period loan held by mortgage company	90 days
Mortgage warehousing maximum pay off period	30 days
Costs are deferred due to the term	$ 0
Impaired loans charged off	90 days
Status of Non-Accrual of Loan	90 days
Impairment of Loan	30 days
Intangibles, Gross	$ 7,400,000
Goodwill	$ 49,600,000	$ 28,176,000	$ 19,748,000
Uncertain tax positions recognized	50.00%
Shares, non-dilutive | shares	2,500	2,500	0
Amount available for payment of dividend	$ 12,700,000
Cash and cash equivalents maximum maturity period	1 day
Compensation expense	$ 643,000	$ 566,000	$ 336,000
Reclassifications effect on net income	$ 0
Buildings and Improvements [Member] | Minimum [Member]
Schedule Of Accounting Policies [Line Items]
Useful Life for depreciation	3 years
Buildings and Improvements [Member] | Maximum [Member]
Schedule Of Accounting Policies [Line Items]
Useful Life for depreciation	40 years
Furniture and Equipment [Member] | Minimum [Member]
Schedule Of Accounting Policies [Line Items]
Useful Life for depreciation	2 years
Furniture and Equipment [Member] | Maximum [Member]
Schedule Of Accounting Policies [Line Items]
Useful Life for depreciation	20 years

Nature of Operations and Summ64

Nature of Operations and Summary of Significant Accounting Policies - Summary of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic earnings per share
Net income	$ 6,175	$ 4,288	$ 4,728	$ 5,358	$ 4,948	$ 4,958	$ 4,778	$ 3,417	$ 20,549	$ 18,101	$ 19,876
Less: Preferred stock dividends									125	133	370
Net income available to common shareholders	$ 6,144	$ 4,257	$ 4,697	$ 5,327	$ 4,917	$ 4,918	$ 4,747	$ 3,386	$ 20,424	$ 17,968	$ 19,506
Weighted average common shares outstanding	11,937,247	11,605,976	9,240,005	9,216,011	9,212,156	9,208,707	9,182,986	8,630,966	10,510,296	9,060,702	8,619,330
Basic Earnings Per Share	$ 0.51	$ 0.37	$ 0.51	$ 0.58	$ 0.53	$ 0.53	$ 0.52	$ 0.39	$ 1.94	$ 1.98	$ 2.26
Diluted earnings per share
Net income available to common shareholders									$ 20,424	$ 17,968	$ 19,506
Weighted average common shares outstanding	11,937,247	11,605,976	9,240,005	9,216,011	9,212,156	9,208,707	9,182,986	8,630,966	10,510,296	9,060,702	8,619,330
Effect of dilutive securities:
Warrants									220,316	315,679	303,970
Weighted average shares outstanding	12,013,743	11,893,254	9,637,586	9,609,506	9,628,240	9,588,332	9,560,939	9,021,786	10,798,208	9,454,125	9,000,963
Diluted Earnings Per Share	$ 0.51	$ 0.36	$ 0.49	$ 0.55	$ 0.51	$ 0.51	$ 0.50	$ 0.38	$ 1.89	$ 1.90	$ 2.17
Restricted Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities									32,010	39,476	40,160
Stock Options [Member]
Effect of dilutive securities:
Effect of dilutive securities									35,586	38,268	37,503

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) - USD ($)	Jul. 01, 2015	Dec. 31, 2015	Dec. 31, 2014	Apr. 03, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Common stock, shares outstanding		11,939,887	9,213,036
Acquisition of goodwill		$ 49,600,000	$ 28,176,000		$ 19,748,000
Peoples Bancorp Inc [Member]
Business Acquisition [Line Items]
Exchange ratio per share	95.00%
Share of common stock outstanding per share	$ 9.75
Common stock, shares outstanding	2,311,858
Common stock issued		2,192,202
Market closing price per share	$ 25.32
Total estimated purchase price	$ 78,147,000
Costs related to the acquisition		$ 4,900,000
Net intangible assets acquired	4,394,000
Acquisition of goodwill	21,424,000
Purchase price of the business assets, portion deductible	0
Core deposit intangible amortization period		7 years
Loan portfolio acquired	228,600,000
Discount on loan portfolio acquired	4,800,000
Performing portion of the loan portfolio acquired	223,400,000
Estimated fair value of performing portion of the loan portfolio	$ 220,000,000
Operating revenue, net of tax		$ 2,300,000
Non-recurring expense, net of tax		$ 3,300,000
Peoples Bancorp Inc [Member] | Maximum [Member]
Business Acquisition [Line Items]
Share of common stock outstanding per share	$ 33.14
Number of shares owned	100
Summit [Member]
Business Acquisition [Line Items]
Exchange ratio per share				49.04%
Share of common stock outstanding per share				$ 5.15
Common stock, shares outstanding				1,164,442
Common stock issued		570,820
Market closing price per share				$ 22.23
Total estimated purchase price				$ 18,900,000
Costs related to the acquisition			$ 1,300,000
Net intangible assets acquired				822,000
Acquisition of goodwill				8,428,000
Purchase price of the business assets, portion deductible				4,400,000
Core deposit intangible amortization period		7 years
Loan portfolio acquired				130,500,000
Discount on loan portfolio acquired				6,400,000
Performing portion of the loan portfolio acquired				106,200,000
Estimated fair value of performing portion of the loan portfolio				104,600,000
Date of acquisition agreement		Apr. 3, 2014
Net tangible assets acquired				$ 19,900,000

Acquisition - Schedule of Final

Acquisition - Schedule of Final Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Jul. 01, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Goodwill	$ 49,600		$ 28,176	$ 19,748
Total assets purchased	148,200
Common shares issued	55,506		12,689
Cash paid	22,641		$ 6,207
Deposits
Total liabilities assumed	$ 122,800
Peoples Bancorp Inc [Member]
ASSETS
Cash and due from banks		$ 205,054
Investment securities, held to maturity		2,038
Total loans		224,359
Premises and equipment, net		5,524
FRB and FHLB stock		2,743
Goodwill		21,424
Core deposit intangible		4,394
Interest receivable		1,279
Cash value of life insurance		13,898
Other assets		4,364
Total assets purchased		485,077
Common shares issued		55,506
Cash paid		22,641
Total estimated purchase price		78,147
Deposits
Non-interest bearing		28,251
NOW accounts		65,771
Savings and money market		125,176
Certificates of deposits		131,889
Total deposits		351,087
Borrowings		48,884
Interest payable		21
Other liabilities		6,938
Total liabilities assumed		406,930
Peoples Bancorp Inc [Member] | Residential Mortgage [Member]
ASSETS
Total loans		137,331
Peoples Bancorp Inc [Member] | Commercial [Member]
ASSETS
Total loans		67,435
Peoples Bancorp Inc [Member] | Consumer [Member]
ASSETS
Total loans		$ 19,593

Acquisition - Schedule of Acqui

Acquisition - Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30 (Detail) - USD ($) $ in Thousands	Jul. 01, 2015	Apr. 03, 2014
Peoples Bancorp Inc [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest at acquisition	$ 5,730
Contractual cash flows not expected to be collected (nonaccretable differences)	715
Expected cash flows at acquisition	5,015
Interest component of expected cash flows (accretable discount)	647
Fair value of acquired loans accounted for under ASC 310-30	$ 4,368
Summit [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest at acquisition		$ 14,460
Contractual cash flows not expected to be collected (nonaccretable differences)		3,146
Expected cash flows at acquisition		11,314
Interest component of expected cash flows (accretable discount)		1,688
Fair value of acquired loans accounted for under ASC 310-30		$ 9,626

Acquisition - Pro Forma Result

Acquisition - Pro Forma Result of Comparable Prior Reporting Period (Detail) - Peoples Bancorp Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Net Interest Income	$ 80,688	$ 75,442
Provision for Loan Losses	3,222	3,443
Net Interest Income after Provision for Loan Losses	77,466	71,999
Non-interest Income	32,295	29,928
Non-Interest Expense	80,489	74,010
Income before Income Taxes	29,272	27,917
Income Tax Expense	7,359	6,560
Net Income	21,913	21,357
Net Income Available to Common Shareholders	$ 21,788	$ 21,372
Basic Earnings Per Share	$ 1.90	$ 1.87
Diluted Earnings Per Share	$ 1.85	$ 1.81

Acquisition - Schedule of Preli

Acquisition - Schedule of Preliminary Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Apr. 03, 2014	Dec. 31, 2013
ASSETS
Goodwill	$ 49,600,000	$ 28,176,000		$ 19,748,000
Total assets purchased	148,200,000
Deposits
Total liabilities assumed	$ 122,800,000
Summit [Member]
ASSETS
Cash and due from banks			$ 15,161,000
Total loans			124,081,000
Premises and equipment, net			2,548,000
FRB and FHLB stock			2,136,000
Goodwill			8,428,000
Core deposit intangible			822,000
Interest receivable			347,000
Cash value of life insurance			2,185,000
Other assets			2,877,000
Total assets purchased			158,585,000
Deposits
Non-interest bearing			27,274,000
NOW accounts			16,332,000
Savings and money market			35,045,000
Certificates of deposits			42,368,000
Total deposits			121,019,000
Borrowings			16,990,000
Interest payable			52,000
Other liabilities			599,000
Total liabilities assumed			138,660,000
Summit [Member] | Residential Mortgage [Member]
ASSETS
Total loans			43,448,000
Summit [Member] | Commercial [Member]
ASSETS
Total loans			70,441,000
Summit [Member] | Consumer [Member]
ASSETS
Total loans			$ 10,192,000

Cash Equivalents - Additional I

Cash Equivalents - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Cash and Cash Equivalents [Abstract]
Cash equivalent maximum maturity period	3 months
Increase in Cash account over the insured limit	$ 5

Securities - Fair Value of Secu

Securities - Fair Value of Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	$ 444,062	$ 319,746
Held-to-maturity, Amortized Cost	187,629	165,767
Gross Unrealized Gains	3,971	5,697
Held-to-maturity, Gross Unrealized Gains	6,636	4,244
Gross Unrealized Losses	(3,051)	(1,679)
Held-to-maturity, Gross Unrealized Losses	(562)	(107)
Available-for-sale Securities, Fair Value	444,982	323,764
Held-to-maturity, Fair Value	193,703	169,904
U.S. Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	5,940	26,996
Held-to-maturity, Amortized Cost	5,859	9,804
Gross Unrealized Gains	3	56
Held-to-maturity, Gross Unrealized Gains	93	82
Gross Unrealized Losses	(17)	(229)
Available-for-sale Securities, Fair Value	5,926	26,823
Held-to-maturity, Fair Value	5,952	9,886
State and Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	73,829	46,535
Held-to-maturity, Amortized Cost	146,331	129,595
Gross Unrealized Gains	1,299	1,462
Held-to-maturity, Gross Unrealized Gains	5,375	3,398
Gross Unrealized Losses	(33)	(45)
Held-to-maturity, Gross Unrealized Losses	(253)	(106)
Available-for-sale Securities, Fair Value	75,095	47,952
Held-to-maturity, Fair Value	151,453	132,887
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	157,291	122,930
Held-to-maturity, Amortized Cost	9,051	4,039
Gross Unrealized Gains	567	975
Held-to-maturity, Gross Unrealized Gains	27	35
Gross Unrealized Losses	(1,655)	(1,045)
Held-to-maturity, Gross Unrealized Losses	(124)	(1)
Available-for-sale Securities, Fair Value	156,203	122,860
Held-to-maturity, Fair Value	8,954	4,073
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	206,970	122,583
Held-to-maturity, Amortized Cost	26,388	22,329
Gross Unrealized Gains	2,080	3,172
Held-to-maturity, Gross Unrealized Gains	1,141	729
Gross Unrealized Losses	(1,346)	(360)
Held-to-maturity, Gross Unrealized Losses	(185)
Available-for-sale Securities, Fair Value	207,704	125,395
Held-to-maturity, Fair Value	27,344	23,058
Private Labeled Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost		670
Gross Unrealized Gains		19
Available-for-sale Securities, Fair Value		689
Corporate Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	32	32
Gross Unrealized Gains	22	13
Available-for-sale Securities, Fair Value	$ 54	$ 45

Securities - Additional Informa

Securities - Additional Information (Detail)	Apr. 01, 2014USD ($)Security	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Amortized Cost and Fair Value Debt Securities [Abstract]
Unrealized loss, other than temporary securities		$ 0
Number of securities | Security	319
Aggregate fair value of securities	$ 167,100,000
Gain/Loss from net unrealized holdings, Net of tax	1,300,000
Unrealized gain or loss, Held to maturity	$ 0
Tax effect of the proceeds from sale of securities		66,000	$ 346,000	$ 131,000
Pledged of Fair Value of Securities as collateral		168,900,000
Amortization cost of securities as Collateral not Separately Reported		167,700,000
Debt Instrument Repurchase Agreement		154,400,000
Securities Pledged for Federal Home Loan Bank At Fair Value		90,700,000
Securities for Federal Home Loan Bank Not Separately Reported		88,700,000
Securities Pledged For Derivative At Fair Value		12,700,000
Securities Pledged For Derivative At Amortized Cost		12,500,000
Debt Instrument Derivative Swap Agreement		4,900,000
Debt Instrument Federal Home Loan Bank		$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized cost within one year	$ 7,192	$ 6,098
Amortized cost one to five years	38,197	44,720
Amortized cost for five to ten years	16,807	16,147
Amortized cost for after ten years	17,605	6,598
Total amortized cost	79,801	73,563
Total available for sale investment securities, Amortized Cost	444,062	319,746
Within one year, amortized cost	0	0
One to five years, amortized cost	17,815	592
Five to ten years, amortized cost	106,167	99,225
After ten years, amortized cost	28,208	39,582
Total amortized cost	152,190	139,399
Total held to maturity investment securities, amortized cost	187,629	165,767
Fair value within one year	7,232	6,169
Fair value for one to five years	38,894	45,093
Fair value for five to ten years	17,152	16,768
Fair value for after ten years	17,797	6,790
Total fair value	81,075	74,820
Investment securities, available for sale	444,982	323,764
Within one year, fair value	0	0
One to five years, fair value	18,403	593
five to ten years, fair value	110,026	101,323
After ten years, fair value	28,976	40,857
Total fair value	157,404	142,773
Held-to-maturity, Fair Value	193,703	169,904
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	157,291	122,930
Total held to maturity investment securities, amortized cost	9,051	4,039
Investment securities, available for sale	156,203	122,860
Held-to-maturity, Fair Value	8,954	4,073
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	206,970	122,583
Total held to maturity investment securities, amortized cost	26,388	22,329
Investment securities, available for sale	207,704	125,395
Held-to-maturity, Fair Value	$ 27,344	23,058
Private Labeled Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost		670
Investment securities, available for sale		$ 689

Securities - Gross Unrealized L

Securities - Gross Unrealized Losses and Fair Value of Company's Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	$ 225,524	$ 34,286
Fair value more than 12 months	42,380	90,657
Total fair value	267,904	124,943
Unrealized losses less than 12 months	(2,632)	(225)
Unrealized losses more than 12 months	(980)	(1,560)
Total unrealized losses	(3,613)	(1,785)
U.S. Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	5,468	2,993
Fair value more than 12 months		20,762
Total fair value	5,468	23,755
Unrealized losses less than 12 months	(17)	(7)
Unrealized losses more than 12 months		(222)
Total unrealized losses	(17)	(229)
State and Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	17,353	10,287
Fair value more than 12 months	446	2,050
Total fair value	17,799	12,337
Unrealized losses less than 12 months	(280)	(121)
Unrealized losses more than 12 months	(6)	(30)
Total unrealized losses	(286)	(151)
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	89,459	15,013
Fair value more than 12 months	25,428	39,801
Total fair value	114,887	54,814
Unrealized losses less than 12 months	(1,123)	(88)
Unrealized losses more than 12 months	(655)	(957)
Total unrealized losses	(1,779)	(1,045)
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	113,244	5,993
Fair value more than 12 months	16,506	28,044
Total fair value	129,750	34,037
Unrealized losses less than 12 months	(1,212)	(9)
Unrealized losses more than 12 months	(319)	(351)
Total unrealized losses	$ (1,531)	$ (360)

Securities - Sales of Securitie

Securities - Sales of Securities Available for Sale (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 43,051	$ 45,228	$ 23,853
Gross gains	254	$ 988	382
Gross losses	$ (65)		$ (8)

Loans - Amounts of Loans (Detai

Loans - Amounts of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage warehouse	$ 144,692	$ 129,156
Total loans	1,749,131	1,378,554
Allowance for loan losses	(14,534)	(16,501)	$ (15,992)	$ (18,270)
Loans, net	1,734,597	1,362,053
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Total	804,995	674,314
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	437,144	254,625
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	362,300	320,459
Working Capital and Equipment [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Total	381,245	300,940
Real Estate Including Agriculture [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Total	391,668	343,455
Tax Exempt Loans Receivable [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Total	8,674	8,595
Other Commercial Loans [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Total	23,408	21,324
1-4 Family [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	433,015	250,799
Other Real Estate Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	4,129	3,826
Auto [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	168,397	154,538
Recreation Consumer Loans Receivable [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	5,365	5,673
Real Estate Home Improvement Loans Receivable [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	47,015	38,288
Home Equity Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	127,113	112,426
Unsecured Debt [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	4,120	3,613
Other Consumer Loans [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer, Total	$ 10,290	$ 5,921

Loans - Additional Information

Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Period of loan sold	30 days
Minimum period seldom held	90 days
Mortgage warehousing maximum pay off period	30 days

Loans - Recorded Investment of

Loans - Recorded Investment of Individual Loan Categories (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	$ 1,745,340	$ 1,377,472
Net loans	1,730,806	1,360,971
Interest Due	5,115	3,832
Deferred Fees / (Costs)	3,792	1,082
Recorded Investment	1,754,247	1,382,386
Recorded Investment	1,739,713	1,365,885
Allowance for loan losses	(14,534)	(16,501)	$ (15,992)	$ (18,270)
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	802,792	673,059
Interest Due	2,207	1,583
Deferred Fees / (Costs)	2,203	1,255
Recorded Investment	807,202	675,897
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	579,367	383,182
Interest Due	1,789	1,238
Deferred Fees / (Costs)	2,470	599
Recorded Investment	583,626	385,019
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	363,181	321,231
Interest Due	1,119	1,011
Deferred Fees / (Costs)	(881)	(772)
Recorded Investment	363,419	321,470
Owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	268,281	228,380
Interest Due	613	385
Deferred Fees / (Costs)	1,328	680
Recorded Investment	270,222	229,445
Non Owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	326,399	297,299
Interest Due	306	309
Deferred Fees / (Costs)	497	506
Recorded Investment	327,202	298,114
Residential Spec Homes [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	5,018	2,027
Interest Due	9	2
Deferred Fees / (Costs)	17
Recorded Investment	5,044	2,029
Development & Spec Land Loans [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	18,183	12,097
Interest Due	33	28
Deferred Fees / (Costs)	26	30
Recorded Investment	18,242	12,155
Commercial and Industrial [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	184,911	133,256
Interest Due	1,246	859
Deferred Fees / (Costs)	335	39
Recorded Investment	186,492	134,154
Residential Mortgage [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	414,924	242,521
Interest Due	1,275	737
Deferred Fees / (Costs)	2,470	599
Recorded Investment	418,669	243,857
Residential Construction [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	19,751	11,505
Interest Due	34	21
Recorded Investment	19,785	11,526
Mortgage Warehousing [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	144,692	129,156
Interest Due	480	480
Recorded Investment	145,172	129,636
Direct Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	54,341	40,137
Interest Due	168	129
Deferred Fees / (Costs)	(359)	(375)
Recorded Investment	54,150	39,891
Direct Installment Purchased [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	153	219
Recorded Investment	153	219
Indirect Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	151,523	141,868
Interest Due	323	314
Deferred Fees / (Costs)		(163)
Recorded Investment	151,846	142,019
Home Equity Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	157,164	139,007
Interest Due	628	568
Deferred Fees / (Costs)	(522)	(234)
Recorded Investment	$ 157,270	$ 139,341

Accounting for Certain Loans 79

Accounting for Certain Loans Acquired in a Transfer - Amounts of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	$ 1,749,131	$ 1,378,554
Carrying amount, net of allowance	1,730,806	1,360,971
Loans Purchased With Evidence Of Credit Deterioration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	10,390	15,626
Carrying amount, net of allowance	10,327	15,267
Loans Purchased With Evidence Of Credit Deterioration [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	8,261	13,217
Loans Purchased With Evidence Of Credit Deterioration [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,088	2,358
Loans Purchased With Evidence Of Credit Deterioration [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	41	51
Loans Purchased With Evidence Of Credit Deterioration [Member] | Heartland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,332	6,400
Loans Purchased With Evidence Of Credit Deterioration [Member] | Heartland [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,633	5,492
Loans Purchased With Evidence Of Credit Deterioration [Member] | Heartland [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	693	900
Loans Purchased With Evidence Of Credit Deterioration [Member] | Heartland [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	6	8
Loans Purchased With Evidence Of Credit Deterioration [Member] | Summit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	6,818	9,226
Loans Purchased With Evidence Of Credit Deterioration [Member] | Summit [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	5,567	7,725
Loans Purchased With Evidence Of Credit Deterioration [Member] | Summit [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,216	1,458
Loans Purchased With Evidence Of Credit Deterioration [Member] | Summit [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	35	$ 43
Loans Purchased With Evidence Of Credit Deterioration [Member] | Peoples Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,240
Loans Purchased With Evidence Of Credit Deterioration [Member] | Peoples Bancorp Inc [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,061
Loans Purchased With Evidence Of Credit Deterioration [Member] | Peoples Bancorp Inc [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	$ 179

Accounting for Certain Loans 80

Accounting for Certain Loans Acquired in a Transfer - Amounts of Loans (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 14,534	$ 16,501	$ 15,992	$ 18,270
Loans Purchased With Evidence Of Credit Deterioration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 63	$ 359

Accounting for Certain Loans 81

Accounting for Certain Loans Acquired in a Transfer - Accretable Yield or Income Expected to be Collected (Detail) - Loans Purchased With Evidence Of Credit Deterioration [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at January 1	$ 3,668	$ 3,185
Additions	647	1,688
Accretion	(725)	(889)
Reclassification from nonaccretable difference	0	0
Disposals	(1,532)	(316)
Balance at December 31	2,058	3,668
Heartland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at January 1	2,400	3,185
Accretion	(327)	(557)
Reclassification from nonaccretable difference	0	0
Disposals	(1,278)	(228)
Balance at December 31	795	2,400
Summit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at January 1	1,268
Additions		1,688
Accretion	(315)	(332)
Reclassification from nonaccretable difference	0	0
Disposals	(245)	(88)
Balance at December 31	708	1,268
Peoples Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	647
Accretion	(83)
Reclassification from nonaccretable difference	0	$ 0
Disposals	(9)
Balance at December 31	$ 555

Accounting for Certain Loans 82

Accounting for Certain Loans Acquired in a Transfer - Additional Information (Detail) - USD ($)	3 Months Ended							12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Total provision charged to operating expense	$ 342,000	$ 300,000	$ 1,906,000	$ 614,000	$ 978,000	$ 1,741,000	$ 339,000	$ 3,162,000	$ 3,058,000	$ 1,920,000
Loans Purchased With Evidence Of Credit Deterioration [Member]
Business Acquisition [Line Items]
Total provision charged to operating expense									(190,000)	253,000
Allowances for loan losses									$ 63,000	$ 283,000

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015
Scenario, Actual [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Actual loss history experienced by the Company	5 years
Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Actual loss history experienced by the Company	1 year
Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Actual loss history experienced by the Company	5 years
Allowance for loan losses charge down family first and junior lien mortgages past due period	180 days
Allowance for loan losses charge down unsecured open end loans past due period	90 days
Allowance for loan losses charge down other secured loans past due period	90 days

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period				$ 16,501				$ 16,501	$ 15,992	$ 18,270
Total loans charged-off								6,099	4,129	6,250
Total loan recoveries								970	1,580	2,052
Net loans charged-off (recovered)								5,129	2,549	4,198
Total provision charged to operating expense	$ 342	$ 300	$ 1,906	$ 614	$ 978	$ 1,741	$ 339	3,162	3,058	1,920
Balance at the end of the period	$ 14,534				$ 16,501			14,534	16,501	15,992
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								3,437	1,802	2,532
Total loan recoveries								192	773	668
Total provision charged to operating expense								2,531	2,277	756
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								2,208	40	138
Total loan recoveries								104	13	65
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								556	136	937
Total loan recoveries								1	210	71
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									173	182
Total loan recoveries								35	55
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								673	1,453	1,275
Total loan recoveries								52	495	532
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								288	328	1,055
Total loan recoveries								69	21	114
Total provision charged to operating expense								62	(1,153)	1,132
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								288	328	1,055
Total loan recoveries								69	21	114
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								2,374	1,999	2,663
Total loan recoveries								709	786	1,270
Total provision charged to operating expense								569	1,934	32
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								367	250	333
Total loan recoveries								106	67	488
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								1,081	1,233	1,178
Total loan recoveries								489	560	658
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off								926	516	1,152
Total loan recoveries								$ 114	$ 159	$ 124

Allowance for Loan Losses - A85

Allowance for Loan Losses - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total ending allowance balance	$ 14,534	$ 16,501	$ 15,992	$ 18,270
Total ending loans balance	7,019	11,055	$ 7,448
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Individually evaluated for impairment	202	1,589
Allowance For Loan Losses, Collectively evaluated for impairment	14,078	14,418
Total ending allowance balance	14,534	16,501
Allowance for Loan Losses [Member] | Loans and Allowance Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality	254	494
Commercial [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Individually evaluated for impairment	202	1,589
Allowance For Loan Losses, Collectively evaluated for impairment	6,739	5,827
Total ending allowance balance	7,195	7,910
Commercial [Member] | Allowance for Loan Losses [Member] | Loans and Allowance Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality	254	494
Real Estate [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	2,476	2,508
Total ending allowance balance	2,476	2,508
Consumer [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	3,856	4,951
Total ending allowance balance	3,856	4,951
Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Individually evaluated for impairment	7,019	11,055
Loans: Collectively evaluated for impairment	1,745,499	1,370,740
Total ending loans balance	1,754,247	1,382,386
Loans [Member] | Loans and Allowance Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	1,729	591
Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Individually evaluated for impairment	7,019	11,055
Loans: Collectively evaluated for impairment	798,454	664,251
Total ending loans balance	807,202	675,897
Loans [Member] | Commercial [Member] | Loans and Allowance Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	1,729	591
Loans [Member] | Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	438,454	255,383
Total ending loans balance	438,454	255,383
Loans [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	363,419	321,470
Total ending loans balance	363,419	321,470
Mortgage Warehousing [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	1,007	1,132
Total ending allowance balance	1,007	1,132
Mortgage Warehousing [Member] | Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	145,172	129,636
Total ending loans balance	$ 145,172	$ 129,636

Non-performing Assets and Imp86

Non-performing Assets and Impaired Loans - Non-accrual, Loans Past Due Over 90 Days Still on Accrual, and Troubled Debt Restructured ("TDRs") by Class of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 12,262	$ 15,312
Loans Past Due Over 90 Days Still Accruing	28	115
Non-Performing TDRs	3,172	2,643
Performing TDRs	1,218	4,372
Total Non-Performing Loans	16,680	22,442
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	5,030	10,024
Non-Performing TDRs	1,915	1,221
Performing TDRs	60	610
Total Non-Performing Loans	7,005	11,855
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,749	1,773
Performing TDRs		44
Total Non-Performing Loans	1,749	1,817
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	3,034	7,439
Non-Performing TDRs	1,915	217
Performing TDRs	60	566
Total Non-Performing Loans	5,009	8,222
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	71
Total Non-Performing Loans	71
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	176	812
Non-Performing TDRs		1,004
Total Non-Performing Loans	176	1,816
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	4,354	2,297
Loans Past Due Over 90 Days Still Accruing	1	40
Non-Performing TDRs	1,074	1,031
Performing TDRs	808	2,526
Total Non-Performing Loans	6,237	5,894
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	4,354	2,297
Loans Past Due Over 90 Days Still Accruing	1	40
Non-Performing TDRs	824	765
Performing TDRs	808	2,526
Total Non-Performing Loans	5,987	5,628
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Performing TDRs	250	266
Total Non-Performing Loans	250	266
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,878	2,991
Loans Past Due Over 90 Days Still Accruing	27	75
Non-Performing TDRs	183	391
Performing TDRs	350	1,236
Total Non-Performing Loans	3,438	4,693
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	541	227
Loans Past Due Over 90 Days Still Accruing		10
Total Non-Performing Loans	541	237
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	601	557
Loans Past Due Over 90 Days Still Accruing	27	47
Total Non-Performing Loans	628	604
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,736	2,207
Loans Past Due Over 90 Days Still Accruing		18
Non-Performing TDRs	183	391
Performing TDRs	350	1,236
Total Non-Performing Loans	$ 2,269	$ 3,852

Non-performing Assets and Imp87

Non-performing Assets and Impaired Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)ConsecutivePaymentContract	Dec. 31, 2014USD ($)
Financing Receivable, Modifications [Line Items]
Non-accrual loans	$ 12,262,000	$ 15,312,000
Non-performing TDRs	3,200,000
Loans acquired included in non-accrual loans	2,900,000
Loans acquired included in non-performing TDRs	$ 110,000
Loan delinquency period	90 days
Minimum period required for satisfactory performance to return loan from non-accrual to accrual status	6 months
Restructured loans with modified recorded balances	$ 0
Restructured loan returned to accruing status number of Consecutive Payments of loan | ConsecutivePayment	6
Restructured loan reported in TDRs	$ 4,400,000
Specific reserves allocated to troubled debt restructuring	$ 140,000
Number TDRs returned to accrual status | Contract	0
Loans classified as TDR after a period	90 days
Performing Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Restructured loan	$ 1,200,000
Good Pass [Member]
Financing Receivable, Modifications [Line Items]
Number of consecutive years of profit Unaudited Financial Information for Good Pass Rating	5 years
Number of years of Satisfactory Relationship with bank for Good Pass Rating	5 years
Minimum [Member]
Financing Receivable, Modifications [Line Items]
Loan delinquency period	90 days
Delay or shortfall in payments of loan	30 days
Loans with an aggregate credit exposure	$ 1,000,000
Minimum [Member] | Good Pass [Member]
Financing Receivable, Modifications [Line Items]
Number of consecutive years of profit for Good Pass Rating	3 years
Minimum [Member] | Satisfactory Pass [Member]
Financing Receivable, Modifications [Line Items]
Minimum number of years of Satisfactory Repayment required for Satisfactory Pass Rating	2 years
Maximum [Member]
Financing Receivable, Modifications [Line Items]
Loans with an aggregate credit exposure	$ 2,500,000

Non-performing Assets and Imp88

Non-performing Assets and Impaired Loans - Commercial Loans Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance total	$ 7,005	$ 11,053	$ 7,426
Total ending loans balance	7,019	11,055	7,448
Allowance For Loan Loss Allocated	202	1,589	1,312
Average Balance in Impaired Loans total	7,110	5,277	7,336
Cash/Accrual Interest Income Recognized, Total	58	379	271
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	6,428	3,216	5,227
Recorded Investment With no recorded allowance	6,442	3,218	5,249
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Average Balance in Impaired Loans With no recorded allowance	6,699	2,343	5,545
Cash/Accrual Interest Income Recognized, With no recorded allowance	37	143	240
Unpaid Principal Balance With an allowance recorded	577	7,837	2,199
Recorded Investment With an allowance recorded	577	7,837	2,199
Allowance For Loan Loss Allocated	202	1,589	1,312
Average Balance in Impaired Loans With an allowance recorded	411	2,934	1,791
Cash/Accrual Interest Income Recognized, With an allowance recorded	21	236	31
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	1,340	1,169	1,293
Recorded Investment With no recorded allowance	1,339	1,170	1,296
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Average Balance in Impaired Loans With no recorded allowance	1,001	645	1,845
Cash/Accrual Interest Income Recognized, With no recorded allowance	22	65	68
Unpaid Principal Balance With an allowance recorded	410	422
Recorded Investment With an allowance recorded	410	422
Allowance For Loan Loss Allocated	105	165
Average Balance in Impaired Loans With an allowance recorded	243	141
Cash/Accrual Interest Income Recognized, With an allowance recorded	8	16
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	4,938	1,193	3,521
Recorded Investment With no recorded allowance	4,953	1,194	3,525
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Average Balance in Impaired Loans With no recorded allowance	5,417	1,341	2,963
Cash/Accrual Interest Income Recognized, With no recorded allowance	8	51	172
Unpaid Principal Balance With an allowance recorded	70	6,453	403
Recorded Investment With an allowance recorded	70	6,453	403
Allowance For Loan Loss Allocated	32	744	202
Average Balance in Impaired Loans With an allowance recorded	6	1,995	485
Cash/Accrual Interest Income Recognized, With an allowance recorded	13	208
Commercial [Member] | Residential Development [Member]
Financing Receivable, Impaired [Line Items]
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	71		23
Recorded Investment With no recorded allowance	71		23
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Average Balance in Impaired Loans With no recorded allowance	6		25
Cash/Accrual Interest Income Recognized, With no recorded allowance	3
Unpaid Principal Balance With an allowance recorded			159
Recorded Investment With an allowance recorded			159
Allowance For Loan Loss Allocated			48
Average Balance in Impaired Loans With an allowance recorded			166
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	79	854	390
Recorded Investment With no recorded allowance	79	854	405
Allowance For Loan Loss Allocated With no recorded allowance	0	0	0
Average Balance in Impaired Loans With no recorded allowance	275	357	712
Cash/Accrual Interest Income Recognized, With no recorded allowance	4	27
Unpaid Principal Balance With an allowance recorded	97	962	1,637
Recorded Investment With an allowance recorded	97	962	1,637
Allowance For Loan Loss Allocated	65	680	1,062
Average Balance in Impaired Loans With an allowance recorded	$ 162	798	1,140
Cash/Accrual Interest Income Recognized, With an allowance recorded		$ 12	$ 31

Non-performing Assets and Imp89

Non-performing Assets and Impaired Loans - Payment Status by Class of Loan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 5,039	$ 5,197
Loans Not Past Due	1,740,301	1,372,275
Total	$ 1,745,340	$ 1,377,472
Total Past Due, Percentage of Total Loans	0.29%	0.38%
Loans Not Past Due, Percentage of Total Loans	99.71%	99.62%
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 580	$ 1,181
Loans Not Past Due	802,212	671,878
Total	802,792	673,059
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	499	748
Loans Not Past Due	267,782	227,632
Total	268,281	228,380
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	49	413
Loans Not Past Due	326,350	296,886
Total	326,399	297,299
Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Not Past Due	5,018	2,027
Total	5,018	2,027
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Not Past Due	18,183	12,097
Total	18,183	12,097
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	32	20
Loans Not Past Due	184,879	133,236
Total	184,911	133,256
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,466	1,266
Loans Not Past Due	577,901	381,916
Total	579,367	383,182
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,466	1,266
Loans Not Past Due	413,458	241,255
Total	414,924	242,521
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Not Past Due	19,751	11,505
Total	19,751	11,505
Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Not Past Due	144,692	129,156
Total	144,692	129,156
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,993	2,750
Loans Not Past Due	360,188	318,481
Total	363,181	321,231
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	116	127
Loans Not Past Due	54,225	40,010
Total	54,341	40,137
Consumer [Member] | Direct Installment Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Not Past Due	153	219
Total	153	219
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,481	1,332
Loans Not Past Due	150,042	140,536
Total	151,523	141,868
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,396	1,291
Loans Not Past Due	155,768	137,716
Total	157,164	139,007
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 4,168	$ 3,807
Total Past Due, Percentage of Total Loans	0.24%	0.28%
30 - 59 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 562	$ 535
30 - 59 Days Past Due [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	481	103
30 - 59 Days Past Due [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	49	413
30 - 59 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	32	19
30 - 59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,121	1,033
30 - 59 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,121	1,033
30 - 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,485	2,239
30 - 59 Days Past Due [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	106	113
30 - 59 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,186	1,042
30 - 59 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,193	1,084
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 843	$ 1,275
Total Past Due, Percentage of Total Loans	0.05%	0.09%
60 - 89 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 18	$ 646
60 - 89 Days Past Due [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18	645
60 - 89 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1
60 - 89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	344	193
60 - 89 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	344	193
60 - 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	481	436
60 - 89 Days Past Due [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	10	4
60 - 89 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	268	243
60 - 89 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	203	189
Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 28	$ 115
Total Past Due, Percentage of Total Loans	0.00%	0.01%
Greater than 90 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1	$ 40
Greater than 90 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1	40
Greater than 90 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	27	75
Greater than 90 Days Past Due [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		10
Greater than 90 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 27	47
Greater than 90 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 18

Non-performing Assets and Imp90

Non-performing Assets and Impaired Loans - Loans by Credit Grades (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,745,340	$ 1,377,472
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	802,792	673,059
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	268,281	228,380
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	326,399	297,299
Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,018	2,027
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18,183	12,097
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	184,911	133,256
Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	579,367	383,182
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	414,924	242,521
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	19,751	11,505
Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	144,692	129,156
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	363,181	321,231
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	54,341	40,137
Consumer [Member] | Direct Installment Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	153	219
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	151,523	141,868
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	157,164	139,007
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,713,981	$ 1,335,853
Percentage of total loans	98.20%	96.98%
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 781,108	$ 642,026
Pass [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	257,181	215,874
Pass [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	320,216	283,518
Pass [Member] | Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,018	2,027
Pass [Member] | Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18,112	12,018
Pass [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	180,581	128,589
Pass [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	573,130	377,288
Pass [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	408,937	236,893
Pass [Member] | Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	19,501	11,239
Pass [Member] | Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	144,692	129,156
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	359,743	316,538
Pass [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	53,800	39,900
Pass [Member] | Consumer [Member] | Direct Installment Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	153	219
Pass [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	150,895	141,264
Pass [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	154,895	135,155
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 6,232	$ 13,959
Percentage of total loans	0.36%	1.01%
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 6,232	$ 13,959
Special Mention [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,954	7,623
Special Mention [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	585	4,458
Special Mention [Member] | Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		79
Special Mention [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	693	1,799
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 25,127	$ 27,661
Percentage of total loans	1.44%	2.01%
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 15,452	$ 17,074
Substandard [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,146	4,883
Substandard [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,598	9,323
Substandard [Member] | Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	71
Substandard [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,637	2,868
Substandard [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,237	5,894
Substandard [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,987	5,628
Substandard [Member] | Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	250	266
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,438	4,693
Substandard [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	541	237
Substandard [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	628	604
Substandard [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,269	$ 3,852
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total loans	0.00%	0.00%

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total cost	$ 90,518	$ 79,411
Accumulated depreciation	(29,720)	(26,950)
Net premise and equipment	60,798	52,461
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	19,475	16,550
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	55,341	49,066
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 15,702	$ 13,795

Loan Servicing - Additional Inf

Loan Servicing - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2013
Receivables [Abstract]
Unpaid principal balances of loans serviced for others totaled	$ 1,164,300	$ 1,035,500
Aggregate fair value of capitalized mortgage servicing rights	10,800	10,500	$ 9,900	$ 6,600
Mortgage servicing rights, net	8,874	7,642	7,039
Bank recorded additional (impairment)	$ (59)	$ 51	$ 635

Loan Servicing - Originated Mor

Loan Servicing - Originated Mortgage Servicing Rights (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Payments for (Proceeds from) Mortgage Servicing Rights [Abstract]
Balances, January 1	$ 7,980	$ 7,428	$ 6,169
Servicing rights capitalized	2,974	2,280	2,535
Amortization of servicing rights	(1,683)	(1,728)	(1,276)
Balances, December 31	9,271	7,980	7,428
Balances, January 1	(338)	(389)	(1,024)
Additions	(130)	(95)	(54)
Reductions	71	146	689
Balances, December 31	(397)	(338)	(389)
Mortgage servicing rights, net	$ 8,874	$ 7,642	$ 7,039

Goodwill and Intangible Asset94

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	Jul. 01, 2015	Apr. 03, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets [Line Items]
Goodwill acquired			$ 21,424,000	$ 8,428,000
Goodwill impairment loss			0	0
Amortization expense for intangible assets totaled			$ 988,000	$ 880,000	$ 760,000
Peoples Bancorp Inc [Member]
Intangible Assets [Line Items]
Goodwill acquired	$ 21,400,000
Core deposit intangible amortization period			7 years
Summit [Member]
Intangible Assets [Line Items]
Goodwill acquired		$ 8,400,000
Core deposit intangible amortization period			7 years
Core Deposits [Member] | Minimum [Member]
Intangible Assets [Line Items]
Core deposit intangible amortization period			7 years
Core Deposits [Member] | Maximum [Member]
Intangible Assets [Line Items]
Core deposit intangible amortization period			10 years

Goodwill and Intangible Asset95

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, January 1	$ 28,176	$ 19,748
Goodwill acquired	21,424	8,428
Balance, December 31	$ 49,600	$ 28,176

Goodwill and Intangible Asset96

Goodwill and Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets Core deposit intangible, Gross Carrying Amount	$ 7,400
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets Core deposit intangible, Gross Carrying Amount	12,920	$ 8,526
Amortizable intangible assets Core deposit intangible, Accumulated Amortization	$ (5,549)	$ (4,561)

Goodwill and Intangible Asset97

Goodwill and Intangible Assets - Estimated Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,016	$ 1,106
2,017	1,103
2,018	1,101
2,019	959
2,020	662
Thereafter	2,440
Estimated amortization	$ 7,371	$ 3,965

Deposits - Deposits (Detail)

Deposits - Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deposits [Line Items]
Noninterest-bearing demand deposits	$ 335,955	$ 267,667
Interest-bearing demand deposits	706,739	606,609
Money market (variable rate)	231,956	179,142
Savings deposits	238,956	144,831
Other certificates and time deposits	298,850	146,923
Total deposits	1,880,153	1,482,319
Certificates of Deposit Two Hundred Fifty Thousand and Greater [Member]
Deposits [Line Items]
Certificates of deposit	$ 67,697	$ 137,147

Deposits - Certificates and Oth

Deposits - Certificates and Other Time Deposits for Both Retail and Brokered (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Time Deposits By Maturity [Line Items]
2,016	$ 167,791
2,017	83,534
2,018	41,672
2,019	32,038
2,020	24,840
Thereafter	16,672
Certificates and other time deposits	366,547
Retail [Member]
Time Deposits By Maturity [Line Items]
2,016	158,389
2,017	77,857
2,018	40,422
2,019	32,038
2,020	24,840
Thereafter	11,018
Certificates and other time deposits	344,564
Brokered [Member]
Time Deposits By Maturity [Line Items]
2,016	9,402
2,017	5,677
2,018	1,250
Thereafter	5,654
Certificates and other time deposits	$ 21,983

Borrowings - Borrowings (Detail

Borrowings - Borrowings (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Federal Home Loan Bank advances, variable and fixed rates ranging from 0.45% to 7.53%, due at various dates through November 15, 2024	$ 158,948	$ 116,473
Securities sold under agreements to repurchase	154,399	139,725
Federal funds purchased	136,000	95,000
Total borrowings	$ 449,347	$ 351,198

Borrowings - Borrowings (Parent

Borrowings - Borrowings (Parenthetical) (Detail)	Dec. 31, 2015
Maximum [Member]
Borrowings Under Repurchase Agreements [Line items]
Federal Home Loan Bank advances, variable and fixed rates	7.53%
Minimum [Member]
Borrowings Under Repurchase Agreements [Line items]
Federal Home Loan Bank advances, variable and fixed rates	0.45%

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) $ in Millions	Dec. 31, 2015USD ($)
Debt Disclosure [Abstract]
Federal Home Loan Bank advances are secured by first and second mortgage loans and mortgage warehouse loans	$ 404.3
Available credit lines with various money center banks	$ 253.2

Borrowings - Contractual Maturi

Borrowings - Contractual Maturities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
2,016	$ 298,235
2,017	48,948
2,018	28,541
2,019	56,777
2,020	11,598
Thereafter	5,248
Total borrowings	$ 449,347	$ 351,198

Repurchase Agreements - Summary

Repurchase Agreements - Summary of Repurchase Agreements Accounted as Secured Borrowings (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 154,399
Securities lending transactions, Total	170,777
Total borrowings	(16,378)
Gross amount of recognized liabilities for repurchase agreements and securities lending	154,399
U.S. Treasury and Federal Agencies [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	5,468
Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	99,174
Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	66,135
Remaining Contractual Maturity of the Agreements, Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	59,399
Securities lending transactions, Total	65,511
Total borrowings	(6,112)
Remaining Contractual Maturity of the Agreements, Overnight and Continuous [Member] | U.S. Treasury and Federal Agencies [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	5,468
Remaining Contractual Maturity of the Agreements, Overnight and Continuous [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	45,975
Remaining Contractual Maturity of the Agreements, Overnight and Continuous [Member] | Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	14,068
Remaining Contractual Maturity of the Agreements, One to Three Years [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	35,000
Securities lending transactions, Total	844
Total borrowings	34,156
Remaining Contractual Maturity of the Agreements, One to Three Years [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	609
Remaining Contractual Maturity of the Agreements, One to Three Years [Member] | Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	235
Remaining Contractual Maturity of the Agreements, Three to Five Years [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	60,000
Securities lending transactions, Total	523
Total borrowings	59,477
Remaining Contractual Maturity of the Agreements, Three to Five Years [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	213
Remaining Contractual Maturity of the Agreements, Three to Five Years [Member] | Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	310
Remaining Contractual Maturity of the Agreements, Five to Ten Years [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	34,944
Total borrowings	(34,944)
Remaining Contractual Maturity of the Agreements, Five to Ten Years [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	19,063
Remaining Contractual Maturity of the Agreements, Five to Ten Years [Member] | Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	15,881
Remaining Contractual Maturity of the Agreements, Beyond Ten Years [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	68,955
Total borrowings	(68,955)
Remaining Contractual Maturity of the Agreements, Beyond Ten Years [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	33,314
Remaining Contractual Maturity of the Agreements, Beyond Ten Years [Member] | Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions, Total	$ 35,641

Repurchase Agreements - Additio

Repurchase Agreements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Disclosure of Repurchase Agreements [Abstract]
Maximum amount of outstanding agreements	$ 156.2	$ 144.3
Daily average amount of outstanding agreements	$ 149.9	$ 140.9
Maturity date	Sep. 13, 2020

Subordinated Debentures - Addit

Subordinated Debentures - Additional Information (Detail) - USD ($)	1 Months Ended				12 Months Ended
	Dec. 31, 2006	Oct. 31, 2004	Jun. 30, 2004	Mar. 31, 2004	Dec. 31, 2015	Dec. 31, 2014
Subordinate Debenture [Line Items]
LIBOR period					3 months
Carrying value of securities, net of remaining purchase discount					$ 32,797,000	$ 32,642,000
Horizon Statutory Trust Two [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold		$ 10,300,000
Securities bearing interest rate					90-day LIBOR plus 1.95%
Junior subordinated debentures and the securities variable rate		1.95%
LIBOR period					90 days
Interest rate on junior subordinated debentures and securities					2.56%
Junior subordinated debentures maturity date					Oct. 21, 2034
Cost of issuance of the securities		$ 17,500
First call date of the securities					Oct. 31, 2009
Horizon Bancorp Capital Trust Three [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold	$ 12,400,000
Securities bearing interest rate					90-day LIBOR plus 1.65%
Junior subordinated debentures and the securities variable rate	1.65%
LIBOR period					90 days
Interest rate on junior subordinated debentures and securities					2.26%
Junior subordinated debentures maturity date					Jan. 30, 2037
Cost of issuance of the securities	$ 12,647
Alliance Financial Statutory Trust One [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold			$ 5,200,000
Securities bearing interest rate					90-day LIBOR plus 2.65%
Junior subordinated debentures and the securities variable rate			2.65%
LIBOR period					90 days
Interest rate on junior subordinated debentures and securities					3.26%
Junior subordinated debentures maturity date					Jun. 1, 2034
Am Tru Statutory Trust One [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold				$ 3,500,000
Securities bearing interest rate					90-day LIBOR plus 2.85%
Junior subordinated debentures and the securities variable rate				2.85%
LIBOR period					90 days
Interest rate on junior subordinated debentures and securities					3.46%
Junior subordinated debentures maturity date					Mar. 1, 2034
Carrying value of securities, net of remaining purchase discount					$ 3,100,000
Heartland Statutory Trust Two [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold	$ 3,000,000
Securities bearing interest rate					90-day LIBOR plus 1.67%
Junior subordinated debentures and the securities variable rate	1.67%
LIBOR period					90 days
Interest rate on junior subordinated debentures and securities					2.28%
Junior subordinated debentures maturity date					Dec. 1, 2036
Carrying value of securities, net of remaining purchase discount					$ 1,700,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Eligible compensation for ESOP	$ 265,000
Cash contributions and expense recorded for the ESOP	$ 450,000	$ 400,000	$ 475,000
Employee stock ownership plan outstanding shares	763,303
Percentage of outstanding shares	6.40%

Employee Thrift and Defined 108

Employee Thrift and Defined Benefit Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Thrift Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Bank's expense related to the thrift plan	$ 848,000	$ 633,000	$ 545,000
Thrift Plan owns outstanding shares	319,994
Percentage of outstanding shares owns with thrift plan	2.70%
Pentegra Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Bank's expense related to the thrift plan	$ 0
Pentegra Plan date	Aug. 1, 2007
Employer identification number	135,645,888
Plan number	333
Withdrawal liability	$ 4,500,000

Income Tax - Reconciliation of

Income Tax - Reconciliation of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Currently payable
Federal	$ 5,270	$ 4,710	$ 3,900
State	241	(149)	(88)
Deferred	1,721	1,594	3,236
Total income tax expense	7,232	6,155	7,048
Reconciliation of federal statutory to actual tax expense
Federal statutory income tax at 35%	9,724	8,488	9,424
Tax exempt interest	(1,708)	(1,628)	(1,517)
Tax exempt income	(488)	(366)	(362)
Other tax exempt income	(199)	(309)	(342)
Nondeductible and other	(97)	(30)	(176)
Effect of state income taxes			21
Total income tax expense	$ 7,232	$ 6,155	$ 7,048

Income Tax - Reconciliation 110

Income Tax - Reconciliation of Income Taxes (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	35.00%

Income Tax - Reconciliation 111

Income Tax - Reconciliation of Deferred Tax Assets & Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Allowance for loan losses	$ 5,329	$ 5,680
Net operating loss (from acquisitions)	1,679	3,509
Director and employee benefits	2,223	1,953
Unrealized loss on AFS securities and fair value hedge	711	588
Accrued Pension	1,725
Other	1,029	596
Total assets	12,696	12,326
Liabilities
Depreciation	(2,180)	(1,563)
Difference in expense recognition	0	0
State tax	(192)	(126)
Federal Home Loan Bank stock dividends	(343)	(200)
Difference in basis of intangible assets	(2,938)	(2,839)
FHLB Penalty	(123)	(283)
Other	(1,671)	(1,303)
Total liabilities	(7,447)	(6,314)
Net deferred tax asset	$ 5,249	$ 6,012

Income Tax - Additional Informa

Income Tax - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
State Tax Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forwards	$ 17.3
Federal Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forwards	$ 1.6
Operating loss carry forward expiration year	2,029
Minimum [Member] | State Tax Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forward expiration year	2,024

Accumulated Other Comprehens113

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gain on securities available for sale	$ 920	$ 4,018
Unamortized gain on securities held to maturity, previously transferred from AFS	1,109	1,658
Unrealized loss on derivative instruments	(3,142)	(3,337)
Tax effect	390	(818)
Total accumulated other comprehensive income (loss)	$ (723)	$ 1,521

Commitments, Off Balance Sheets

Commitments, Off Balance Sheets Risk and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Cash on hand or deposit with Federal Reserve Bank	$ 126,000,000
Commitments to make loans	468,800,000	$ 408,600,000
Commitments under outstanding standby letters of credit	3,600,000	$ 3,900,000
Anticipated losses from unused commitments	$ 0

Regulatory Capital - Summary of

Regulatory Capital - Summary of Regulatory Capital Requirement (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Regulatory Assets And Liabilities [Line Items]
Total capital (to risk-weighted assets), Actual, Amount	$ 264,452	$ 212,276
Total capital (to risk-weighted assets), Actual, Ratio	13.99%	14.48%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 151,223	$ 117,280
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Tier 1 capital (to average assets), Actual, Amount	$ 249,918	$ 195,775
Tier 1 capital (to average assets), Actual, Ratio	13.22%	13.35%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 113,427	$ 58,659
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	6.00%	4.00%
Common equity tier 1 capital, Actual Amount	$ 204,350
Common equity tier 1 capital, Actual Ratio	10.81%
Common equity tier 1 capital,For capital adequacy purposes, Amount	$ 85,067
Common equity tier 1 capital, For capital adequacy purpose, Ratio	4.50%
Tier 1 capital (to average assets), Actual, Amount	$ 249,918	$ 195,775
Tier 1 capital (to average assets), Actual, Ratio	9.82%	9.76%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 101,800	$ 80,236
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	4.00%	4.00%
Bank [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Total capital (to risk-weighted assets), Actual, Amount	$ 237,348	$ 192,604
Total capital (to risk-weighted assets), Actual, Ratio	12.57%	13.08%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 151,057	$ 117,801
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Total capital (to risk-weighted assets), For well capitalized purpose, Amount	$ 188,821	$ 147,251
Total capital (to risk-weighted assets), For well capitalized purpose, Ratio	10.00%	10.00%
Tier 1 capital (to average assets), Actual, Amount	$ 222,814	$ 176,103
Tier 1 capital (to average assets), Actual, Ratio	11.80%	11.96%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 113,295	$ 58,897
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	6.00%	4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount	$ 151,060	$ 88,346
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	8.00%	6.00%
Common equity tier 1 capital, Actual Amount	$ 222,814
Common equity tier 1 capital, Actual Ratio	11.80%
Common equity tier 1 capital,For capital adequacy purposes, Amount	$ 84,971
Common equity tier 1 capital, For capital adequacy purpose, Ratio	4.50%
Common equity tier 1 capital, For well capitalized purpose, Amount	$ 122,737
Common equity tier 1 capital, For well capitalized purposes, Ratio	6.50%
Tier 1 capital (to average assets), Actual, Amount	$ 222,814	$ 176,103
Tier 1 capital (to average assets), Actual, Ratio	8.77%	8.80%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 101,626	$ 80,047
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	4.00%	4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount	$ 127,032	$ 100,059
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	5.00%	5.00%

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Based Compensation [Line Items]
Share-based compensation, performance awards, performance goals description	The performance shares that are awarded become earned and vested based on the achievement of certain performance goals during a performance period as established by the Committee at the time of each grant. The performance goals are based on a comparison of the Company’s average performance over the performance period for the return on common equity, compounded annual growth rate of total assets, and return on average assets, all as relative to the average performance for publicly traded banks with total assets between $1 billion and $5 billion on the SNL Bank Index. Holders of performance share awards receive pass-through dividends but do not have any voting rights before the performance shares are earned and vested.
Total assets	$ 2,652,401,000	$ 2,076,922,000
Tax benefit associated with compensation expense	101,000	71,000	$ 19,000
Total compensation cost	288,000	203,000	48,000
Total compensation cost	643,000	566,000	336,000
Cash received from option exercise	403,000	122,000	136,000
Actual tax benefit realized for the tax deductions	151,000	$ 43,000	$ 58,000
Unrecognized compensation cost	$ 983,000
Weighted-average period cost over which cost is expected to be recognized	1 year 6 months
Option Activity Under the 2013 Plan [Member]
Stock Based Compensation [Line Items]
Maximum common shares issued under the plan	691,700
Non-option awards granted	400,000
Number of shares available incentive stock options	100,000
Weighted average grant-date fair value of options granted	$ 6.14	$ 6.50	$ 5.74
Option Activity Under the 2003 Plan [Member]
Stock Based Compensation [Line Items]
Maximum common shares issued under the plan	337,500
Non-option awards granted	168,750
Additional common shares available for issuance	393,750
Grants vest at the end of	4 years
Option Activity Under the 2003 Plan [Member] | Minimum [Member]
Stock Based Compensation [Line Items]
Grants vest at the end of	3 years
Option Activity Under the 2003 Plan [Member] | Maximum [Member]
Stock Based Compensation [Line Items]
Grants vest at the end of	5 years
Restricted and Performance Shares [Member]
Stock Based Compensation [Line Items]
Tax benefit associated with compensation expense	$ 124,000	$ 127,000	$ 115,000
Total compensation cost	355,000	$ 363,000	$ 288,000
Performance Based Share Awards [Member] | Minimum [Member]
Stock Based Compensation [Line Items]
Total assets	1,000,000,000
Performance Based Share Awards [Member] | Maximum [Member]
Stock Based Compensation [Line Items]
Total assets	$ 5,000,000,000

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Option Activity (Detail) - Option Activity Under the 2003 Plan [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)$ / sharesshares
Schedule Of Stock Option Activity [Line Items]
Option outstanding, Shares, Beginning balance | shares	77,947
Option granted, Shares | shares	0
Option Exercised, Shares | shares	(33,347)
Option forfeited, Shares | shares	(600)
Option outstanding, Shares, Ending balance | shares	44,000
Option Exercisable, Shares, Ending balance | shares	41,750
Option outstanding, Weighted Average Exercise Price, Beginning balance | $ / shares	$ 11.35
Option Granted, Weighted Average Exercise Price | $ / shares	0
Option Exercised, Weighted Average Exercise Price | $ / shares	11.63
Option Forfeited, Weighted Average Exercise Price | $ / shares	16.46
Option Outstanding, Weighted Average Exercise Price, Ending balance | $ / shares	11.07
Option Exercisable, Weighted Average Exercise Price, Ending balance | $ / shares	$ 10.85
Option Outstanding, Weighted Average Remaining Contractual Term	4 years 7 days
Option Exercisable, Weighted Average Remaining Contractual Term	3 years 10 months 24 days
Option outstanding, Aggregate Intrinsic Value | $	$ 743,164
Option Exercisable, Aggregate Intrinsic Value | $	$ 714,286

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value of Options Granted (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yields	2.35%	2.01%	1.98%
Volatility factors of expected market price of common stock	28.97%	29.54%	29.75%
Risk-free interest rates	2.10%	2.66%	2.16%
Expected life of options	8 years	8 years	8 years

Share-Based Compensation - S119

Share-Based Compensation - Summary of Option Activity Under 2013 Plan (Detail) - Option Activity Under the 2013 Plan [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Stock Option Activity [Line Items]
Option outstanding, Shares, Beginning balance	84,147
Option granted, Shares	39,944
Option Exercised, Shares	(666)
Option forfeited, Shares	(2,334)
Option outstanding, Shares, Ending balance	121,091	84,147
Option Exercisable, Shares, Ending balance	41,412
Option outstanding, Weighted Average Exercise Price, Beginning balance	$ 21.24
Option Granted, Weighted Average Exercise Price	23.83
Option Exercised, Weighted Average Exercise Price	20.24
Option Forfeited, Weighted Average Exercise Price	22.62
Option Outstanding, Weighted Average Exercise Price, Ending balance	22.08	$ 21.24
Option Exercisable, Weighted Average Exercise Price, Ending balance	$ 20.90
Option Outstanding, Weighted Average Remaining Contractual Term		8 years 3 months 11 days
Option Exercisable, Weighted Average Remaining Contractual Term		7 years 8 months 16 days
Option outstanding, Aggregate Intrinsic Value	$ 712,506
Option Exercisable, Aggregate Intrinsic Value	$ 292,263

Share-Based Compensation - S120

Share-Based Compensation - Summary of Status of Non-vested, Restricted and Performance Shares (Detail) - Restricted and Performance Shares [Member]	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested beginning of year, Shares | shares	84,757
Vested, Shares | shares	(25,059)
Granted, Shares | shares	25,001
Forfeited, Shares | shares	(2,316)
Non-vested, end of year, Shares | shares	82,383
Non-vested beginning of year, Weighted Average Grant Date Fair Value | $ / shares	$ 15.18
Vested, Weighted Average Grant Date Fair Value | $ / shares	14.09
Granted, Weighted Average Grant Date Fair Value | $ / shares	23.83
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	16.64
Non-vested end of year, Weighted Average Grant Date Fair Value | $ / shares	$ 18.19

Derivative Financial Instrum121

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
LIBOR period	3 months
Weighted average fixed rate	6.14%
Recorded period of effectiveness of cash flow hedges on net income	12 months
Recorded period of effectiveness of fair value hedges on net income	12 months
Recorded period of effectiveness of fair value of derivatives on net income	12 months
Cash Flow Hedging [Member]
Derivative [Line Items]
Notional amount of interest	$ 30.5	$ 30.5
Derivative in Fair Value Hedging Relationship [Member]
Derivative [Line Items]
Notional amount of interest	$ 117.3	$ 102.7

Derivative Financial Instrum122

Derivative Financial Instruments - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Asset Derivatives	$ 2,424	$ 1,655
Total Liability Derivatives	4,923	4,547
Derivatives Designated as Hedging Instruments [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Asset Derivatives	1,782	1,208
Total Liability Derivatives	4,923	4,547
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts One [Member] | Other Liabilities [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Liability Derivatives	1,782	1,208
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Liabilities [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Liability Derivatives	3,141	3,339
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Asset Derivatives	1,782	1,208
Derivatives Not Designated as Hedging Instruments [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Asset Derivatives	642	447
Derivatives Not Designated as Hedging Instruments [Member] | Mortgage Loan Contracts [Member] | Other Assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Total Asset Derivatives	$ 642	$ 447

Derivative Financial Instrum123

Derivative Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statement of Income Derivative in Cash Flow Hedging Relationship (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow Hedging [Member] | Interest Rate Contracts One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Comprehensive Income on Derivative (Effective Portion)	$ 127	$ (332)	$ 1,734

Derivative Financial Instrum124

Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Income Derivative in Fair Value Hedging Relationship (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income - Loans [Member] | Derivative in Fair Value Hedging Relationship [Member] | Interest Rate Contracts One [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized on Derivative	$ 574	$ 1,261	$ (2,267)
Interest Income - Loans [Member] | Derivative in Fair Value Hedging Relationship [Member] | Interest Rate Contracts Two [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized on Derivative	(574)	(1,261)	2,267
Derivatives Not Designated as Hedging Instruments [Member] | Other income - Gain on Sale of Loans [Member] | Mortgage Loan Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized on Derivative	$ 195	$ 256	$ (667)

Disclosures about Fair Value125

Disclosures about Fair Value of Assets and Liabilities - Fair Value Measurements of Assets and Liabilities Recognized on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	$ 444,982	$ 323,764
U.S. Treasury and Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	5,926	26,823
State and Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	75,095	47,952
Federal Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	156,203	122,860
Federal Agency Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	207,704	125,395
Private Labeled Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value		689
Corporate Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	54	45
Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	444,982	323,764
Recurring Basis [Member] | U.S. Treasury and Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	5,926	26,823
Recurring Basis [Member] | State and Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	75,095	47,952
Recurring Basis [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	156,203	122,860
Recurring Basis [Member] | Federal Agency Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	207,704	125,395
Recurring Basis [Member] | Private Labeled Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value		689
Recurring Basis [Member] | Corporate Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	54	45
Recurring Basis [Member] | Hedged Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	115,472	101,445
Recurring Basis [Member] | Forward Sale Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	642	447
Recurring Basis [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	(4,923)	(4,547)
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	444,982	323,764
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury and Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	5,926	26,823
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | State and Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	75,095	47,952
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Federal Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	156,203	122,860
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Federal Agency Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	207,704	125,395
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Private Labeled Mortgage-backed Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value		689
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	54	45
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Hedged Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	115,472	101,445
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Forward Sale Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	642	447
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	$ (4,923)	$ (4,547)

Disclosures about Fair Value126

Disclosures about Fair Value of Assets and Liabilities - Realized Gains and Losses included in Net Income for Periods in Consolidated Statements of Income (Detail) - Non Interest Income Total Gains and Losses [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	$ 195	$ 256	$ (667)
Hedged Loans [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	574	1,261	(2,267)
Interest Rate Swap [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	(574)	(1,261)	2,267
Derivative Loan Commitments [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	$ 195	$ 256	$ (667)

Disclosures about Fair Value127

Disclosures about Fair Value of Assets and Liabilities - Other Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	$ 6,803	$ 9,464
Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	8,874	7,642
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	6,803	9,464
Fair Value, Measurements, Nonrecurring [Member] | Mortgage Servicing Rights [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	8,874	7,642
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	6,803	9,464
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	$ 8,874	$ 7,642

Disclosures about Fair Value128

Disclosures about Fair Value of Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Reduced in carrying amount of mortgage servicing rights	$ (397,000)	$ (338,000)

Disclosures about Fair Value129

Disclosures about Fair Value of Assets and Liabilities - Qualitative Information about Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements, Other than Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	10.00%
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 6,803	$ 9,464
Valuation Technique	Collateral based measurement
Impaired loans	Discount to reflect current market conditions and ultimate collectability
Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 8,874	$ 7,642
Valuation Technique	Discounted cashflows
Impaired loans	Discount rate, Constant prepayment rate, Probability of default
Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	10.00%	10.00%
Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	10.00%	10.00%
Constant prepayment rate	4.00%	4.00%
Probability of default	1.00%	1.00%
Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	15.00%	15.00%
Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	15.00%	15.00%
Constant prepayment rate	7.00%	7.00%
Probability of default	10.00%	10.00%
Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	12.00%	12.00%
Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	12.00%	12.00%
Constant prepayment rate	4.60%	4.60%
Probability of default	4.50%	4.50%

Fair Value of Financial Inst130

Fair Value of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 48,650	$ 43,476
Investment securities, held to maturity	187,629	165,767
Loans held for sale	7,917	6,143
Loans excluding loan level hedges, net	1,739,713	1,365,885
Stock in FHLB and FRB	13,823	11,348
Interest receivable	10,535	8,246
Liabilities
Non-interest bearing deposits	335,955	267,667
Subordinated debentures	32,797	32,642
Interest payable	507	497
Carrying Amount [Member]
Assets
Cash and due from banks	48,650	43,476
Investment securities, held to maturity	187,629	165,767
Loans held for sale	7,917	6,143
Loans excluding loan level hedges, net	1,619,125	1,260,608
Stock in FHLB and FRB	13,823	11,348
Interest receivable	10,535	8,246
Liabilities
Non-interest bearing deposits	335,955	267,667
Interest-bearing deposits	1,544,198	1,214,652
Borrowings	449,347	351,198
Subordinated debentures	32,797	32,642
Interest payable	507	497
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Cash and due from banks	48,650	43,476
Liabilities
Non-interest bearing deposits	335,955	267,667
Significant Other Observable Inputs (Level 2) [Member]
Assets
Investment securities, held to maturity	193,703
Stock in FHLB and FRB	13,823	11,348
Interest receivable	10,535	8,246
Liabilities
Interest-bearing deposits	1,461,314	1,158,912
Borrowings	441,547	348,597
Subordinated debentures	32,996	32,669
Interest payable	507	497
Significant Unobservable Inputs (Level 3) [Member]
Assets
Investment securities, held to maturity		169,904
Loans held for sale	7,917	6,143
Loans excluding loan level hedges, net	$ 1,703,506	$ 1,295,133

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($)	Feb. 04, 2016	Feb. 03, 2016	Feb. 01, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Reported total assets of acquiree				$ 148,200,000
Total deposits held by acquiree				122,800,000
Total loans of acquiree				$ 106,100,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash paid for each share to Peoples shareholder	$ 81.75
Exchange ratio per share to Peoples shareholder	3.0122%
Business combination stock transferred, percentage of consideration	65.00%
Business combination cash transferred, percentage of consideration	35.00%
Market closing price per share		$ 23.99
Estimated transaction value		$ 22,500,000
Series B Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Preferred stock, shares outstanding			12,500
Preferred stock, liquidation value			$ 1,000
Preferred stock, redemption price			$ 12,510,416.67

Condensed Financial Informat132

Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Total cash and cash equivalents	$ 48,650	$ 43,476	$ 31,721	$ 30,735
Other assets	31,995	32,141
Total assets	2,652,401	2,076,922
Liabilities
Subordinated debentures	32,797	32,642
Other liabilities	22,765	15,852
Stockholders' Equity	266,832	194,414	164,520	158,968
Total liabilities and stockholders' equity	2,652,401	2,076,922
Parent Company [Member]
Assets
Total cash and cash equivalents	26,507	19,195	$ 16,807	$ 13,639
Investment in Bank	276,718	211,928
Other assets	3,392	2,758
Total assets	306,617	233,881
Liabilities
Subordinated debentures	32,797	32,642
Other liabilities	6,988	6,825
Stockholders' Equity	266,832	194,414
Total liabilities and stockholders' equity	$ 306,617	$ 233,881

Condensed Financial Informat133

Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Income (Expense)
Other income									$ 1,103	$ 1,013	$ 1,103
Interest expense	$ (3,568)	$ (3,802)	$ (3,277)	$ (3,207)	$ (3,242)	$ (3,451)	$ (3,334)	$ (3,195)	(13,854)	(13,222)	(13,503)
Employee benefit expense									(37,712)	(32,682)	(31,032)
Income Before Income Tax									27,781	24,256	26,924
Income Tax Benefit									(7,232)	(6,155)	(7,048)
Net income	6,175	4,288	4,728	5,358	4,948	4,958	4,778	3,417	20,549	18,101	19,876
Net Income Available to Common Shareholders	6,144	4,257	4,697	5,327	4,917	4,918	4,747	3,386	20,424	17,968	19,506
Net income	$ 6,175	$ 4,288	$ 4,728	$ 5,358	$ 4,948	$ 4,958	$ 4,778	$ 3,417	20,549	18,101	19,876
Other Comprehensive Income (Loss)
Change in fair value of derivative instruments, net of taxes									127	(332)	1,734
Other Comprehensive Income (Loss), Net of Tax									(2,244)	3,250	(10,830)
Comprehensive Income									18,305	21,351	9,046
Parent Company [Member]
Operating Income (Expense)
Dividend income from Bank									30,470	12,500	7,500
Investment income									15	12	4
Other income									24	17	175
Interest expense									(2,009)	(2,009)	(2,010)
Employee benefit expense									(1,093)	(965)	(811)
Other expense									910	883	646
Income Before Undistributed Income of Subsidiaries									28,317	10,438	5,504
Undistributed Income of Subsidiaries									(8,168)	6,814	13,144
Income Before Income Tax									20,149	17,252	18,648
Income Tax Benefit									400	849	1,228
Net income									20,549	18,101	19,876
Preferred stock dividend									(125)	(133)	(370)
Net Income Available to Common Shareholders									20,424	17,968	19,506
Net income									20,549	18,101	19,876
Other Comprehensive Income (Loss)
Change in fair value of derivative instruments, net of taxes									127	(332)	1,734
Unrealized appreciation for the period on held-to-maturity securities, net of taxes									(357)	1,078
Unrealized appreciation (depreciation) on available-for-sale securities, net of taxes									(1,891)	3,146	(12,320)
Less: reclassification adjustment for realized gains included in net income, net of taxes									(123)	(642)	(244)
Other Comprehensive Income (Loss), Net of Tax									(2,244)	3,250	(10,830)
Comprehensive Income									$ 18,305	$ 21,351	$ 9,046

Condensed Financial Informat134

Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net income	$ 6,175	$ 4,288	$ 4,728	$ 5,358	$ 4,948	$ 4,958	$ 4,778	$ 3,417	$ 20,549	$ 18,101	$ 19,876
Items not requiring (providing) cash
Change in Share based compensation									288	203	48
Other assets									8,569	(4,945)	9,905
Other liabilities									(472)	712	498
Net cash provided by operating activities									35,230	17,665	46,965
Investing Activities
Net cash used in investing activities									(124,188)	(149,046)	49,797
Financing Activities
Dividends paid on preferred shares									(125)	(133)	(370)
Dividends paid on common shares									(6,216)	(4,744)	(3,655)
Net cash provided by financing activities									94,132	143,136	(95,776)
Net Change in Cash and Cash Equivalents									5,174	11,755	986
Cash and Cash Equivalents, Beginning of Period				43,476				31,721	43,476	31,721	30,735
Cash and Cash Equivalents, End of Period	48,650				43,476				48,650	43,476	31,721
Summit [Member]
Investing Activities
Acquisition of businesses										7,914
Peoples Bancorp Inc [Member]
Investing Activities
Acquisition of businesses									182,413
Parent Company [Member]
Operating Activities
Net income									20,549	18,101	19,876
Items not requiring (providing) cash
Equity in undistributed net income of subsidiaries									8,168	(6,814)	(13,144)
Change in Share based compensation									288	203	48
Amortization of unearned compensation									355	363	288
Other assets									(634)	906	(167)
Other liabilities									(13)	1,377	97
Net cash provided by operating activities									28,713	14,136	6,998
Investing Activities
Net cash used in investing activities									(19,365)	(7,036)
Financing Activities
Dividends paid on preferred shares									(125)	(133)	(370)
Dividends paid on common shares									(6,216)	(4,744)	(3,655)
Exercise of stock options									4,305	165	195
Net cash provided by financing activities									(2,036)	(4,712)	(3,830)
Net Change in Cash and Cash Equivalents									7,312	2,388	3,168
Cash and Cash Equivalents, Beginning of Period				$ 19,195				$ 16,807	19,195	16,807	13,639
Cash and Cash Equivalents, End of Period	$ 26,507				$ 19,195				26,507	19,195	$ 16,807
Parent Company [Member] | Summit [Member]
Investing Activities
Acquisition of businesses										$ (7,036)
Parent Company [Member] | Peoples Bancorp Inc [Member]
Investing Activities
Acquisition of businesses									$ (19,365)

Quarterly Results of Operati135

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Consolidated Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 23,790	$ 23,578	$ 21,127	$ 20,093	$ 19,765	$ 19,851	$ 20,122	$ 16,467	$ 88,588	$ 76,205	$ 74,886
Interest expense	3,568	3,802	3,277	3,207	3,242	3,451	3,334	3,195	13,854	13,222	13,503
Net interest income	20,222	19,776	17,850	16,886	16,523	16,400	16,788	13,272	74,734	62,983	61,383
Provision for loan losses	342	300	1,906	614	978	1,741	339		3,162	3,058	1,920
Gain on sale of securities	65			124		988			189	988	374
Net income	6,175	4,288	4,728	5,358	4,948	4,958	4,778	3,417	20,549	18,101	19,876
Net income available to common shareholders	$ 6,144	$ 4,257	$ 4,697	$ 5,327	$ 4,917	$ 4,918	$ 4,747	$ 3,386	$ 20,424	$ 17,968	$ 19,506
Earnings per share:
Basic	$ 0.51	$ 0.37	$ 0.51	$ 0.58	$ 0.53	$ 0.53	$ 0.52	$ 0.39	$ 1.94	$ 1.98	$ 2.26
Diluted	$ 0.51	$ 0.36	$ 0.49	$ 0.55	$ 0.51	$ 0.51	$ 0.50	$ 0.38	$ 1.89	$ 1.90	$ 2.17
Average shares outstanding:
Basic	11,937,247	11,605,976	9,240,005	9,216,011	9,212,156	9,208,707	9,182,986	8,630,966	10,510,296	9,060,702	8,619,330
Diluted	12,013,743	11,893,254	9,637,586	9,609,506	9,628,240	9,588,332	9,560,939	9,021,786	10,798,208	9,454,125	9,000,963