Horizon Bancorp (HBNC) 10-K 28 Feb 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 27, 2019	Jun. 29, 2018
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Registrant Name	HORIZON BANCORP INC /IN/
Entity Central Index Key	706,129
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Trading Symbol	HBNC
Entity Common Stock, Shares Outstanding		38,375,407
Entity Public Float			$ 763.7
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 58,492	$ 59,980
Interest-earning time deposits	15,744	16,461
Investment securities, available for sale	600,348	509,665
Investment securities, held to maturity (fair value of $208,273 and $201,085)	210,112	200,448
Loans held for sale	1,038	3,094
Loans, net of allowance for loan losses of $17,820 and $16,394	2,995,512	2,818,786
Premises and equipment, net	74,331	75,529
Federal Home Loan Bank stock	18,073	18,105
Goodwill	119,880	119,880
Other intangible assets	10,390	12,402
Interest receivable	14,239	13,059
Cash value of life insurance	88,062	75,931
Other assets	40,467	40,963
Total assets	4,246,688	3,964,303
Liabilities
Non-interest bearing	642,129	601,805
Interest bearing	2,497,247	2,279,198
Total deposits	3,139,376	2,881,003
Borrowings	550,384	564,157
Subordinated debentures	37,837	37,653
Interest payable	2,031	886
Other liabilities	25,068	23,526
Total liabilities	3,754,696	3,507,225
Commitments and contingent liabilities
Stockholders' Equity
Preferred stock, Authorized, 1,000,000 shares, Issued 0 shares
Common stock, no par value, Authorized 99,000,000 shares (Restated—See Note 1) Issued 38,400,476 and 38,323,604 shares (Restated—See Note 1), Outstanding 38,375,407 and 38,294,729 shares (Restated—See Note 1)
Additional paid-in capital	276,101	275,059
Retained earnings	224,035	185,570
Accumulated other comprehensive loss	(8,144)	(3,551)
Total stockholders' equity	491,992	457,078
Total liabilities and stockholders' equity	$ 4,246,688	$ 3,964,303

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 208,273	$ 201,085
Allowance for loan losses	$ 17,820	$ 16,394
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value
Common stock, shares authorized	99,000,000	99,000,000
Common stock, shares issued	38,400,476	38,323,604
Common stock, shares outstanding	38,375,407	38,294,729

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Income
Loans receivable	$ 147,478	$ 112,329	$ 91,569
Investment securities
Taxable	10,621	9,086	10,039
Tax exempt	8,069	7,068	4,921
Total interest income	166,168	128,483	106,529
Interest Expense
Deposits	18,225	7,901	6,616
Borrowed funds	11,009	6,178	11,807
Subordinated debentures	2,365	2,304	2,114
Total interest expense	31,599	16,383	20,537
Net Interest Income	134,569	112,100	85,992
Provision for loan losses	2,906	2,470	1,842
Net Interest Income after Provision for Loan Losses	131,663	109,630	84,150
Non-interest Income
Service charges on deposit accounts	7,762	6,383	5,762
Wire transfer fees	612	658	806
Interchange fees	5,715	5,104	4,165
Fiduciary activities	7,827	7,894	6,621
Gains (losses) on sale of investment securities (includes $(443), $38 and $1,836 for the years ended December 31, 2018, 2017 and 2016, respectively, related to accumulated other comprehensive earnings reclassificiations)	(443)	38	1,836
Gain on sale of mortgage loans	6,613	7,906	11,675
Mortgage servicing income net of impairment	2,120	1,583	1,908
Increase in cash value of bank owned life insurance	1,912	1,797	1,643
Death benefit on bank owned life insurance	154
Other income	2,141	1,773	1,039
Total non-interest income	34,413	33,136	35,455
Non-interest Expense
Salaries and employee benefits	56,623	51,375	44,013
Net occupancy expenses	10,482	9,535	8,322
Data processing	6,816	5,914	5,367
Professional fees	1,926	2,490	2,752
Outside services and consultants	5,271	7,018	7,863
Loan expense	6,341	4,970	5,582
FDIC insurance expense	1,444	1,046	1,559
Other losses	665	368	684
Other expense	12,948	12,097	10,750
Total non-interest expense	102,516	94,813	86,892
Income Before Income Taxes	63,560	47,953	32,713
Income tax expense (includes $(93), $13 and $643 for the years ended December 31, 2018, 2017 and 2016, respectively, related to income tax expense (benefit) from reclassification items)	10,443	14,836	8,801
Net Income	53,117	33,117	23,912
Preferred stock dividend	0	0	(42)
Net Income Available to Common Shareholders	$ 53,117	$ 33,117	$ 23,870
Basic Earnings Per Share	$ 1.39	$ 0.96	$ 0.80
Diluted Earnings Per Share	$ 1.38	$ 0.95	$ 0.79

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Accumulated other comprehensive earnings reclassifications	$ (443)	$ 38	$ 1,836
Income tax expense from reclassification	$ (93)	$ 13	$ 643

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 53,117	$ 33,117	$ 23,912
Change in fair value of derivative instruments:
Change in fair value of derivative instruments for the period	(32)	1,404	9
Income tax effect	7	(491)	(3)
Changes from derivative instruments	(25)	913	6
Change in securities:
Unrealized appreciation (depreciation) for the period on AFS securities	(5,067)	2,110	(5,091)
Amortization from transfer of securities from available for sale to held to maturity securities	(190)	(256)	(653)
Reclassification adjustment for securities (gains) losses realized in income	443	(38)	(1,836)
Income tax effect	1,012	(636)	2,653
Unrealized gains (losses) on securities	(3,802)	1,180	(4,927)
Other Comprehensive Income (Loss), Net of Tax	(3,827)	2,093	(4,921)
Comprehensive Income	$ 49,290	$ 35,210	$ 18,991

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Kosciusko Financial Inc [Member]	LaPorte Bancorp Inc [Member]	Lafayette Community Bancorp [Member]	Wolverine Bancorp Inc [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Kosciusko Financial Inc [Member]	Additional Paid-in Capital [Member]LaPorte Bancorp Inc [Member]	Additional Paid-in Capital [Member]Lafayette Community Bancorp [Member]	Additional Paid-in Capital [Member]Wolverine Bancorp Inc [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balances at Dec. 31, 2015	$ 266,832					$ 12,500	$ 106,370					$ 148,685	$ (723)
Net income	23,912											23,912
Other comprehensive income (loss), net of tax	(4,921)												(4,921)
Redemption of preferred stock	(12,500)					$ (12,500)
Amortization of unearned compensation	284						284
Stock issued stock plans	572						572
Stock option expense	324						324
Stock issued from acquisition		$ 14,470	$ 60,306					$ 14,470	$ 60,306
Cash dividends on preferred stock	(42)											(42)
Cash dividends on common stock	(8,382)											(8,382)
Ending Balances at Dec. 31, 2016	340,855						182,326					164,173	(5,644)
Net income	33,117											33,117
Other comprehensive income (loss), net of tax	2,093												2,093
Amortization of unearned compensation	135						135
Exercise of stock options	1,604						1,604
Stock option expense	325						325
Stock issued from acquisition				$ 28,558	$ 62,111					$ 28,558	$ 62,111
Cash dividends on common stock	(11,720)											(11,720)
Ending Balances at Dec. 31, 2017	457,078						275,059					185,570	(3,551)
Net income	53,117											53,117
Other comprehensive income (loss), net of tax	(3,827)												(3,827)
Amortization of unearned compensation	169						169
Stock issued stock plans	129						129
Exercise of stock options	493						493
Stock option expense	251						251
Cash dividends on common stock	(15,418)											(15,418)
Reclassification of tax adjustment on accumulated other comprehensive loss												766	(766)
Ending Balances at Dec. 31, 2018	$ 491,992						$ 276,101					$ 224,035	$ (8,144)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash dividends on preferred stock, rate			1.00%
Cash dividends on common stock, per share	$ 0.40	$ 0.33	$ 0.27

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 53,117	$ 33,117	$ 23,912
Items not requiring (providing) cash
Provision for loan losses	2,906	2,470	1,842
Depreciation and amortization	6,813	5,936	5,275
Share based compensation	251	325	324
Mortgage servicing rights, net impairment	(60)	80	110
Premium amortization on securities, net	5,798	6,024	6,162
Loss (gain) on sale of investment securities	443	(38)	(1,836)
Gain on sale of mortgage loans	(6,613)	(7,906)	(11,675)
Proceeds from sales of loans	197,492	231,410	328,377
Loans originated for sale	(188,823)	(218,511)	(316,875)
Change in cash value life insurance	(1,912)	(1,797)	(1,618)
Death benefit on bank owned life insurance	154
Loss (gain) on sale of other real estate owned	(209)	(4)	261
Net change in:
Interest receivable	(1,180)	(2,591)	(544)
Interest payable	1,145	152	(275)
Other assets	2,460	6,173	489
Other liabilities	658	(5,776)	(8,381)
Net cash provided by operating activities	72,440	49,064	25,548
Transfer of loans to other real estate
Purchases of securities available for sale	(214,706)	(149,376)	(225,555)
Proceeds from sales, maturities, calls and principal repayments of securities available for sale	123,377	85,587	269,587
Purchases of securities held to maturity	(28,374)	(31,794)	(45,832)
Proceeds from maturities of securities held to maturity	8,301	13,376	30,843
Net change in interest-earning time deposits	717	950	(4,083)
Change in Federal Reserve and FHLB stock	32	8,987	(5,448)
Net change in loans	(182,637)	(251,821)	32,099
Proceeds on the sale of OREO and repossessed assets	3,258	4,238	2,572
Change in premises and equipment, net	(3,434)	(2,689)	(1,383)
Purchases of bank owned life insurance	(10,450)
Net cash provided by (used in) investing activities	(303,916)	(278,924)	222,307
Net change in:
Deposits	258,373	(13,360)	46,590
Borrowings	(13,589)	259,895	(255,994)
Redemption of preferred stock			(12,500)
Proceeds from issuance of stock	622	1,604	572
Dividends paid on common stock	(15,418)	(11,720)	(8,382)
Dividends paid on preferred stock			(42)
Net cash provided by (used in) financing activities	229,988	236,419	(229,756)
Net Change in Cash and Cash Equivalents	(1,488)	6,559	18,099
Cash and Cash Equivalents at Beginning of Year	59,980	53,421	35,322
Cash and Cash Equivalents at End of Year	58,492	59,980	53,421
Additional Supplemental Information
Interest paid	30,454	15,969	20,572
Income taxes paid	6,819	10,350	6,916
Transfer of loans to other real estate	$ 3,005	2,411	3,679
Kosciusko Financial Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition			30,437
LaPorte Bancorp Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition			116,521
Central National Bank & Trust [Member]
Transfer of loans to other real estate
Net cash received in acquisition			$ 22,549
Single Branch of First Farmers Bank & Trust Co [Member]
Transfer of loans to other real estate
Net cash received in acquisition		11,000
Lafayette Community Bancorp [Member]
Transfer of loans to other real estate
Net cash received in acquisition		20,425
Gain on remeasurement of equity interest in Lafayette		(530)
Wolverine Bancorp Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition		$ 12,723

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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 consolidated financial statements of Horizon Bancorp, Inc. (“Horizon”) and its wholly owned subsidiaries, Horizon Bank (“Bank”) and Horizon Risk Management, Inc., together referred to as “Horizon” conform to accounting principles generally accepted in the United States of America and reporting practices followed by the banking industry. Horizon Risk Management, Inc. is a captive insurance company incorporated in Nevada and was formed as a wholly owned subsidiary of Horizon. 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 62 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”); Heartland Bancshares, Inc. in 2013, which formed Heartland (IN) Statutory Trust II (“Heartland Trust”); and LaPorte Bancorp, Inc. in 2016, which acquired City Savings Statutory Trust I (“City Savings Trust”) in 2007. 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 — The consolidated financial statements include the accounts of Horizon and subsidiaries. All material inter-company accounts and transactions have been eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those 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 — Horizon uses fair value measurements to record fair value adjustments, to certain assets, and liabilities and to determine fair value disclosures. Horizon has adopted Accounting Standards Codification (ASC) 820, Fair Value Measurements and Disclosures for all applicable financial and nonfinancial assets and liabilities. This accounting guidance defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. This guidance applies only when other guidance requires or permits assets or liabilities to be measured at fair value; it does not expand the use of fair value in any new circumstances. 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 — Horizon designates the majority of its investment portfolio as available for sale based on management’s plans to use such securities for asset and liability management, liquidity and not to hold such securities as long-term investments. Management repositions the portfolio to take advantage of future expected interest rate trends when Horizon’s long-term profitability can be enhanced. Investment securities available for sale and marketable equity securities are carried at estimated fair value and any net unrealized gains/losses (after tax) on these securities are included in accumulated other comprehensive income. Amortization of premiums and accretion of discounts are recorded as interest income from securities. Gains/losses on the disposition of securities available for sale are recognized at the time of the transaction and are determined by the specific identification method. Investment Securities Held to Maturity — Includes any security for which Horizon has the positive intent and ability to hold until maturity. These securities are carried at amortized cost. Loans Held for Sale — Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to noninterest income. Gains and losses on loan sales are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan. Interest and Fees on Loans — Interest on commercial, mortgage and installment loans is recognized over the term of the loans based on the principal amount outstanding. When 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. Loan origination fees, net of direct loan origination costs, are deferred and recognized over the life of the loan as a yield adjustment. Discounts and premiums on purchased loans are amortized to income using the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments. Concentrations of Credit Risk — The Bank grants commercial, real estate, and consumer loans to customers located primarily in the Northern and Central regions of Indiana and the Southern, Central and Great Lakes Bay regions of Michigan and provides mortgage warehouse lines to mortgage companies in the United States. Commercial loans make up approximately 57% of the loan portfolio and are secured by both real estate and business assets. These loans are expected to be repaid from cash flows from operations of the businesses. The Bank does not have a concentration in speculative commercial real estate loans. Residential real estate loans make up approximately 22% of the loan portfolio and are secured by residential real estate. Installment loans make up approximately 18% of the loan portfolio and are primarily secured by consumer assets. Mortgage warehouse loans make up approximately 3% of the loan portfolio and are secured by residential real estate. Mortgage Warehouse Loans — Horizon’s mortgage warehousing has specific mortgage companies as customers of the Bank. Individual mortgage loans originated by these mortgage companies are funded as a secured borrowing with pledge of collateral under Horizon’s agreement with the mortgage company. Each individual mortgage 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. 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 — An allowance for loan losses is maintained to absorb probable incurred losses inherent in the loan portfolio. The allowance is based on ongoing quarterly assessments of the probable incurred losses inherent in the loan portfolio. The allowance is increased by the provision for credit losses, which is charged against current period operating results and decreased by the amount of charge offs, net of recoveries. Horizon’s methodology for assessing the appropriateness of the allowance consists of several key elements, which include the general allowance, specific allowances for identified problem loans and the qualitative allowance. 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 — When analysis determines a borrower’s operating results and financial condition are not adequate to meet 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 placed on non-accrual status when 90 days or more past due. These loans are also often considered impaired. Impaired loans or portions thereof, are charged-off when deemed uncollectible. This typically occurs when the loan is 90 or more days past due. 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. Performing loans acquired (FASB ASC 310-20) with credit impairment subsequent to the acquisition date are evaluated individually and charged down to the fair value of the underlying collateral in the period the uncollectible loss is reasonably determined. Premises and Equipment — Buildings and major improvements are capitalized and depreciated using primarily the straight-line method with useful lives ranging from 3 to 40 years. Furniture and equipment are capitalized and depreciated using primarily the straight-line method with useful lives ranging from 2 to 20 years. Maintenance and repairs are expensed as incurred while major additions and improvements are capitalized. Gains and losses on disposition are included in current operations. Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock — The stock is a required investment for institutions that are members of the Federal Reserve Bank (“FRB”) and Federal Home Loan Bank (“FHLB”) systems. The required investment in the common stock is based on a predetermined formula. Mortgage Servicing Rights —Mortgage servicing assets are recognized separately when rights are acquired through purchase or through sale of financial assets. Under the servicing assets and liabilities accounting guidance (ASC 860-50), servicing rights resulting from the sale or securitization of loans originated by the Company are initially measured at fair value at the date of transfer. Amortized mortgage servicing rights include commercial mortgage servicing rights. Under the amortization method, servicing rights are amortized in proportion to and over the period of estimated net servicing income. The amortized assets are assessed for impairment or increased obligation based on fair value at each reporting date. 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 — Goodwill is tested annually for impairment. At December 31, 2018, Horizon had core deposit intangibles of $10.4 million subject to amortization and $119.9 million of goodwill, which is not subject to amortization. Goodwill arising from business combinations represents the value attributable to unidentifiable intangible assets in the business acquired. Horizon’s goodwill relates to the value inherent in the banking industry and that value is dependent upon the ability of Horizon to provide quality, cost effective banking services in a competitive marketplace. The goodwill value is supported by revenue that is in part driven by the volume of business transacted. If the implied fair value of goodwill is lower than its carrying amount, goodwill impairment is indicated and goodwill is written down to its implied fair value. A large majority of the goodwill relates to the acquisitions of Heartland, Summit, Peoples, Kosciusko, LaPorte, Lafayette and Wolverine. Bank Owned Life Insurance (BOLI) – BOLI has been purchased on certain employees and directors of the Company. The Company records the life insurance at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due that are probable at settlement. Income Taxes —The Company accounts for income taxes in accordance with income tax accounting guidance (ASC 740, Income Taxes ). The income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. 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 — Property, other than cash deposits, held in a fiduciary or agency capacity is not included in the consolidated balance sheets since such property is not owned by Horizon. Transfer of Financial Assets — The transfer of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company and put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets. Earnings per Common Share — Basic earnings per share is computed by dividing net income available to common shareholders (net income less dividend requirements for preferred stock and accretion of preferred stock discount) by the weighted-average number of common shares outstanding. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. The following table shows computation of basic and diluted earnings per share. Years Ended December 31 2018 2017 2016 Basic earnings per share Net income $ 53,117 $ 33,117 $ 23,912 Less: Preferred stock dividends — — 42 Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Basic earnings per share $ 1.39 $ 0.96 $ 0.80 Diluted earnings per share Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Effect of dilutive securities: Restricted stock 36,185 46,981 39,829 Stock options 111,987 159,721 102,193 Weighted average common shares outstanding 38,495,231 34,760,438 30,123,614 $ 1.38 $ 0.95 $ 0.79 (1) Adjusted for 3:2 stock split on June 15, 2018 At December 31, 2018, there were 102,138 shares and at December 31, 2017 and 2016 there were zero shares that were not included in the computation of diluted earnings per share because they were non-dilutive. On May 15, 2018, the Board of Directors of the Company approved a three-for-two stock split of the Company’s authorized common stock, no par value. All share and per share amounts in the consolidated financial statements and notes thereto have been retroactively adjusted, where necessary, to reflect this three-for-two stock split. The effect of the three-for-two stock split on the outstanding common shares is that shareholders of record as of the close of business on May 31, 2018, the record date, received an additional half share for each share of common stock held, with shareholders receiving cash in lieu of any fractional shares. The additional shares issued in the stock split were payable and issued on June 15, 2018, and the common shares began trading on a split-adjusted basis on June 19, 2018. Dividend Restrictions — Horizon’s principal source of funds for dividend payments is dividends received from the Bank. Banking regulations limit the amount of dividends that may be paid without prior approval of regulatory agencies. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s net profits combined with the retained net profits of the preceding two years, subject to the capital requirements described in Note 21. At December 31, 2018, the Bank could, without prior approval, declare dividends of approximately $26.0 million to Horizon. Additionally, the Federal Reserve Board limits the amount of dividends that may be paid by Horizon to its stockholders under its capital adequacy guidelines. Consolidated Statements of Cash Flows — For purposes of reporting cash flows, cash and cash equivalents are defined to include cash and due from banks, money market investments and federal funds sold with maturities of one day or less. Horizon reports net cash flows for customer loan transactions, deposit transactions, short-term investments and borrowings. Comprehensive Income — Comprehensive income consists of net income and other comprehensive income (loss), net of applicable income taxes. Other comprehensive income (loss) includes unrealized appreciation (depreciation) on available-for-sale securities, unrealized and realized gains and losses in derivative financial instruments and amortization of available-for-sale securities transferred to held-to-maturity. Share-Based Compensation Derivative Financial Instruments — The Company occasionally enters into derivative financial instruments as part of its interest rate risk management strategies. These derivative financial instruments consist primarily of interest rate swaps. All derivative instruments are recorded on the Statements of Financial Condition, as either an asset or liability, at their fair value. The accounting for the gain or loss resulting from the change in fair value depends on the intended use of the derivative. For a derivative used to hedge changes in fair value of a recognized asset or liability, or an unrecognized firm commitment, the gain or loss on the derivative will be recognized in earnings together with the offsetting loss or gain on the hedged item. This results in an earnings impact only to the extent that the hedge is ineffective in achieving offsetting changes in fair value. If it is determined that the derivative instrument is not highly effective as a hedge, hedge accounting is discontinued and the adjustment to fair value of the derivative instrument is recorded in earnings. For a derivative used to hedge changes in cash flows associated with forecasted transactions, the gain or loss of the effective portion of the derivative will be deferred, and reported as accumulated other comprehensive income, a component of shareholders’ equity, until such time the hedged transaction affects earnings. For derivative instruments not accounted for as hedges, changes in fair value are recognized in non-interest income or non-interest expense. Deferred gains and losses from derivatives that are terminated and were in a cash flow hedge are amortized over the shorter of the original remaining term of the derivative or the remaining life of the underlying asset or liability. Reclassifications Recent Accounting Pronouncements Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement The FASB has issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Instrument FASB ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	Note 2 – Acquisitions Wolverine Bancorp, Inc. On October 17, 2017, Horizon completed the acquisition of Wolverine Bancorp, Inc., a Maryland corporation (“Wolverine”) and Horizon Bank’s acquisition of Wolverine Bank, a federally chartered savings bank and wholly-owned subsidiary of Wolverine, through mergers effective October 17, 2017. Under the terms of the Merger Agreement, shareholders of Wolverine received 1.5228 shares of Horizon common stock and $14.00 in cash for each outstanding share of Wolverine common stock. Wolverine shares outstanding at the closing to be exchanged were 2,129,331, and the shares of Horizon common stock issued to Wolverine shareholders totaled 3,241,045. Based upon the October 16, 2017 closing price of $19.37 per share of Horizon common stock immediately prior to the effectiveness of the merger, less the consideration used to pay off Wolverine Bancorp’s ESOP loan receivable, the transaction has an implied valuation of approximately $93.8 million. The Company incurred approximately $1.9 million in costs related to the acquisition as of December 31, 2017. These expenses are classified in the non-interest section of the income statement and are 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 costs through economies of scale. Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations 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 Wolverine acquisition is allocated as follows: Assets Cash and due from banks $ 44,450 Loans Commercial 276,167 Residential mortgage 30,603 Consumer 3,897 Total loans 310,667 Premises and equipment, net 2,941 FRB and FHLB stock 2,700 Goodwill 26,827 Core deposit intangible 2,024 Interest receivable 584 Other assets 3,897 Total assets purchased $ 394,090 Common shares issued $ 62,111 Cash paid 31,662 Total purchase price $ 93,773 Liabilities Deposits Non-interest bearing $ 25,221 NOW accounts 8,026 Savings and money market 129,044 Certificates of deposit 94,688 Total deposits 256,979 Borrowings 36,970 Interest payable 214 Other liabilities 6,154 Total liabilities assumed $ 300,317 Of the total purchase price of $93.8 million, $2.0 million has been allocated to core deposit intangible. Additionally, $26.8 million has been allocated to goodwill and none of the purchase price is deductible. The core deposit intangible will be amortized over 10 years on a straight line basis. The Company acquired various loans in the acquisition that 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 assumptions, such as default rates, severity and prepayment speeds. Loans 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 October 17, 2017. Contractually required principal and interest at acquisition $ 21,912 Contractual cash flows not expected to be collected (nonaccretable differences) 1,832 Expected cash flows at acquisition 20,080 Interest component of expected cash flows (accretable discount) 2,267 Fair value of acquired loans accounted for under ASC 310-30 $ 17,813 Final estimates of certain loans, those for which 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. Lafayette Community Bancorp On September 1, 2017, Horizon completed the acquisition of Lafayette Community Bancorp, an Indiana corporation (“Lafayette”) and Horizon Bank’s acquisition of Lafayette Community Bank, a state-chartered bank and wholly-owned subsidiary of Lafayette, through mergers effective September 1, 2017. Under the terms of the Merger Agreement, shareholders of Lafayette received 0.8817 shares of Horizon common stock and $1.73 in cash for each outstanding share of Lafayette common stock. Lafayette shareholders owning fewer than 100 shares of common stock received $17.25 in cash for each common share. Lafayette shares outstanding at the closing to be exchanged were 1,856,679, and the shares of Horizon common stock issued to Lafayette shareholders totaled 1,636,888. Based upon the August 31, 2017 closing price of $17.45 per share of Horizon common stock immediately prior to the effectiveness of the merger, the transaction has an implied valuation of approximately $34.5 million. The Company incurred approximately $1.7 million in costs related to the acquisition as of December 31, 2017. These expenses are classified in the non-interest expense section of the income statement and are 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. Horizon held 5% ownership in Lafayette immediately preceding the merger date. In accordance with ASC 805-10 – Business Combinations, Horizon was required to remeasure the equity interest in Lafayette’s common stock and recognize the resulting gain or loss, if any, in earnings. Since Lafayette was traded in the OTC market, the remeasurement was based on the closing price of Lafayette’s common stock immediately prior to the acquisition announcement and immediately prior to Horizon taking control of Lafayette. This remeasurement resulted in a gain of $ 530 Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Lafayette acquisition is detailed in the following table. Assets Cash and due from banks $ 24,846 Investment securities, available for sale 6 Loans Commercial 116,258 Residential mortgage 12,761 Consumer 5,280 Total loans 134,299 Premises and equipment, net 7,818 FHLB stock 395 Goodwill 15,408 Core deposit intangible 2,085 Interest receivable 338 Other assets 1,649 Total assets purchased $ 186,844 Common shares issued $ 30,044 (1) Cash paid 4,421 Total purchase price $ 34,465 Liabilities Deposits Non-interest bearing $ 34,990 NOW accounts 30,174 Savings and money market 53,663 Certificates of deposit 32,520 Total deposits 151,347 Interest payable 42 Other liabilities 990 Total liabilities assumed $ 152,379 (1) This includes $ 955,000 Of the total estimated purchase price of $34.5 million, $2.1 million has been allocated to core deposit intangible. Additionally, $15.4 million has been allocated to goodwill and none of the purchase price is deductible. The core deposit intangible will be amortized over 10 years on a straight-line basis. The Company acquired various loans in the acquisition that 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. Loans 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 an estimate of the acquired loans that are accounted for in accordance with ASC 310-30 as of September 1, 2017. Contractually required principal and interest at acquisition $ 6,128 Contractual cash flows not expected to be collected (nonaccretable differences) 1,326 Expected cash flows at acquisition 4,802 Interest component of expected cash flows (accretable discount) 933 Fair value of acquired loans accounted for under ASC 310-30 $ 3,869 Final estimates of certain loans, those for which 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. Bargersville Branch Purchase On February 3, 2017, Horizon completed the purchase and assumption of certain assets and liabilities of a single branch of First Farmers Bank & Trust Company, in Bargersville, Indiana. Net cash of $11.0 million was received in the transaction, representing the deposit balances assumed at closing, net of amounts paid for loans acquired in the transaction of $3.4 million and a 3.0% premium on deposits. Customer deposit balances were recorded at $14.8 million and a core deposit intangible of $ 452 CNB Bancorp 5.3 million. The Company incurred approximately $ 779 , Under the purchase method of accounting, the total estimated purchase price is allocated to CNB’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 final purchase price for the CNB acquisition is allocated as follows: Assets Cash and due from banks $ 27,860 Investment securities, available for sale 16,393 Loans Commercial 2,267 Residential mortgage 6,624 Consumer 1,579 Total loans 10,470 Premises and equipment, net 444 FHLB stock 50 Goodwill 609 Core deposit intangible 190 Interest receivable 154 Other assets 49 Total assets purchased $ 56,219 Cash paid $ 5,311 Total purchase price $ 5,311 Liabilities Deposits Non-interest bearing $ 24,079 NOW accounts 9,038 Savings and money market 13,829 Certificates of deposit 3,342 Total deposits 50,288 Borrowings 459 Interest payable 7 Other liabilities 154 Total liabilities assumed $ 50,908 5.3 million, $ 190 ,000 has been allocated to core deposit intangible. Additionally, $ 609 ,000 has been allocated to goodwill and none of the purchase price is deductible. The core deposit intangible will be amortized over 10 years on a straight line basis. 10.8 million performing loan portfolio with an estimated fair value of $10.5 million. No loans were purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected or which are considered to be credit impaired. LaPorte Bancorp, Inc. On July 18, 2016, Horizon completed the acquisition of LaPorte Bancorp, Inc., a Maryland corporation (“LaPorte Bancorp”) and the Bank’s acquisition of The LaPorte Savings Bank, a state-chartered savings bank and wholly owned subsidiary of LaPorte Bancorp, through mergers effective July 18, 2016. Under the terms of the merger agreement, shareholders of LaPorte Bancorp had the option to receive $ 17.50 35 5,132,232 shares of its common stock in the merger. Based upon the July 18, 2016 closing price of $12.24 per share of Horizon common stock, less the consideration used to pay off LaPorte Bancorp’s ESOP loan receivable, the transaction has an implied valuation of approximately $98.6 million. The Company incurred approximately $4.0 million in costs related to the acquisition as of December 31, 2016. These expenses are classified in the non-interest 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 was able to increase its deposit base and reduce transaction costs. The Company also expects to reduce costs through economies of scale. Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the LaPorte Bancorp acquisition is detailed in the following table. Assets Cash and due from banks $ 154,849 Investment securities, available for sale 23,779 Loans Commercial 153,750 Residential mortgage 42,603 Consumer 16,801 Mortgage warehousing 99,752 Total loans 312,906 Premises and equipment, net 6,022 FHLB stock 4,029 Goodwill 20,993 Core deposit intangible 2,514 Interest receivable 844 Cash value of life insurance 15,267 Other assets 8,334 Total assets purchased $ 549,537 Common shares issued $ 60,306 Cash paid 38,328 Total purchase price $ 98,634 Liabilities Deposits Non-interest bearing $ 66,733 NOW accounts 99,346 Savings and money market 117,688 Certificates of deposit 87,605 Total deposits 371,372 Borrowings 64,793 Subordinated debentures 4,504 Interest payable 178 Other liabilities 10,056 Total liabilities assumed $ 450,903 Of the total estimated purchase price of $ 98.6 million, $2.5 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 10 The Company acquired various loans in the acquisition that 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. Loans 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 th at are accounted for in accordance with ASC 310-30 as of July 18, 2016. Contractually required principal and interest at acquisition $ 12,545 Contractual cash flows not expected to be collected ( nonaccretable differences) 4,492 Expected cash flows at acquisition 8,053 Interest component of expected cash flows ( accretable discount) 1,258 Fair value of acquired loans accounted for under ASC 310-30 $ 6,795 Final estimates of certain loans, those for which 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. Kosciusko Financial, Inc. On June 1, 2016, Horizon completed the acquisition of Kosciusko Financial, Inc., an Indiana corporation (“Kosciusko”) and the Bank’s acquisition of Farmers State Bank, a state-chartered bank and wholly owned subsidiary of Kosciusko, through mergers effective June 1, 2016. Under the terms of the merger agreement, shareholders of Kosciusko had the option to receive $ 81.75 6.7775 shares of Horizon common stock for each share of Kosciusko’s common stock, subject to allocation provisions to assure that in aggregate, Kosciusko shareholders received total consideration that consisted of 65% stock and 35% cash. Kosciusko shareholders owning fewer than 100 shares of common stock received $81.75 in cash for each common share. As a result of Kosciusko shareholder stock and cash elections and the related proration provisions of the merger agreement, Horizon issued 1,310,145 shares of its common stock in the merger. Based upon the June 1, 2016 closing price of $11.04 per share of Horizon common stock, the transaction has an implied valuation of approximately $23.0 million. The Company incurred approximately $2.0 million in costs related to the acquisition. These expenses are classified in the non-interest 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 was able to increase its deposit base and reduce transaction costs. The Company also expects to reduce costs through economies of scale. Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Kosciusko acquisition is detailed in the following table. Assets Cash and due from banks $ 38,950 Investment securities, available for sale 1,191 Loans Commercial 70,006 Residential mortgage 26,244 Consumer 6,319 Total loans 102,569 Premises and equipment, net 1,466 FRB and FHLB stock 582 Goodwill 6,443 Core deposit intangible 526 Interest receivable 636 Cash value of life insurance 2,745 Other assets 765 Total assets purchased $ 155,873 Common shares issued $ 14,470 Cash paid 8,513 Total purchase price $ 22,983 Liabilities Deposits Non-interest bearing $ 27,871 NOW accounts 35,213 Savings and money market 26,953 Certificates of deposit 32,771 Total deposits 122,808 Borrowings 9,038 Interest payable 55 Other liabilities 989 Total liabilities assumed $ 132,890 Of the total estimated purchase price of $23.0 million, $526,000 has been allocated to core deposit intangible. Additionally, $6.4 million has been allocated to goodwill and none of the purchase price is deductible. The core deposit intangible will be amortized over 10 years on a straight line basis. The Company acquired various loans in the acquisition that 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. Loans 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 June 1, 2016. Contractually required principal and interest at acquisition $ 2,682 Contractual cash flows not expected to be collected ( nonaccretable differences) 25 Expected cash flows at acquisition 2,657 Interest component of expected cash flows ( accretable discount) 634 Fair value of acquired loans accounted for under ASC 310-30 $ 2,023 Final estimates of certain loans, those for which 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 results of operations of Wolverine, Lafayette, CNB, LaPorte Bancorp and Kosciusko 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, 2017 and 2016 as if the Wolverine, Lafayette, CNB, LaPorte Bancorp and Kosciusko acquisitions had occurred as of the beginning of the comparable prior reporting periods. Years Ended December 31 2017 2016 Summary of Operations: Net Interest Income $ 125,442 $ 115,860 Provision for Loan Losses (12 ) 1,082 Net Interest Income after Provision for Loan Losses 125,454 114,778 Non-interest Income 33,959 43,330 Non-interest Expense 109,605 119,522 Income before Income Taxes 49,808 38,586 Income Tax Expense 16,204 12,072 Net Income 33,604 26,514 Net Income Available to Common Shareholders $ 33,604 $ 26,472 Basic Earnings per Share $ 0.97 $ 0.88 Diluted Earnings per Share $ 0.97 $ 0.88 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 2017 includes $ 2.6 million, net of tax, of operating revenue from Lafayette and Wolverine since acquisitions and approximately $2.7 million, net of tax, of non-recurring expenses directly attributable to the Lafayette and Wolverine acquisitions. The pro-forma information for the year ended 2016 includes $4.3 million, net of tax, of operating revenue from CNB, LaPorte Bancorp and Kosciusko since acquisition and approximately $4.8 million, net of tax, of non-recurring expenses directly attributable to the acquisitions. 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 been consummated as of that time, nor is it intended to be a projection of future results.

Cash Equivalents

Cash Equivalents	12 Months Ended
	Dec. 31, 2018
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, 2018 and 2017, cash equivalents consisted primarily of money market accounts with brokers and certificates of deposit. At December 31, 2018, the Company’s cash accounts exceeded federally insured limits by approximately $10.3 million. 3.5

Securities

Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Note 4 – Securities The fair value of securities is as follows: December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale U.S. Treasury and federal agencies $ 16,815 $ 1 $ (208 ) $ 16,608 State and municipal 210,386 1,495 (2,578 ) 209,303 Federal agency collateralized mortgage obligations 187,563 625 (3,185 ) 185,003 Federal agency mortgage-backed pools 183,479 80 (4,823 ) 178,736 Corporate notes 10,666 107 (75 ) 10,698 Total available for sale investment securities $ 608,909 $ 2,308 $ (10,869 ) $ 600,348 Held to maturity State and municipal $ 191,269 $ 1,773 $ (3,366 ) $ 189,676 Federal agency collateralized mortgage obligations 5,144 6 (120 ) 5,030 Federal agency mortgage-backed pools 13,699 74 (206 ) 13,567 Total held to maturity investment securities $ 210,112 $ 1,853 $ (3,692 ) $ 208,273 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale U.S. Treasury and federal agencies $ 19,277 $ — $ (225 ) $ 19,052 State and municipal 148,045 2,189 (670 ) 149,564 Federal agency collateralized mortgage obligations 132,871 45 (2,551 ) 130,365 Federal agency mortgage-backed pools 211,487 155 (2,985 ) 208,657 Private labeled mortgage-backed pools 1,650 — (8 ) 1,642 Corporate notes 272 113 — 385 Total available for sale investment securities $ 513,602 $ 2,502 $ (6,439 ) $ 509,665 Held to maturity State and municipal $ 179,836 $ 3,493 $ (2,932 ) $ 180,397 Federal agency collateralized mortgage obligations 5,734 17 (69 ) 5,682 Federal agency mortgage-backed pools 14,878 216 (88 ) 15,006 Total held to maturity investment securities $ 200,448 $ 3,726 $ (3,089 ) $ 201,085 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, 2018, 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, 2018. 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, 2018 and December 31, 2017, 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, 2018 December 31, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Available for sale Within one year $ 20,532 $ 20,448 $ 13,347 $ 13,326 One to five years 42,476 41,705 40,468 40,193 Five to ten years 107,839 107,107 50,473 51,156 After ten years 67,020 67,349 63,306 64,326 237,867 236,609 167,594 169,001 Federal agency collateralized mortgage obligations 187,563 185,003 132,871 130,365 Federal agency mortgage-backed pools 183,479 178,736 211,487 208,657 Private labeled mortgage-backed pools — — 1,650 1,642 Total available for sale investment securities $ 608,909 $ 600,348 $ 513,602 $ 509,665 Held to maturity Within one year $ 70 $ 70 $ 1,948 $ 1,934 One to five years 48,732 49,324 40,603 41,531 Five to ten years 101,809 101,533 89,801 91,249 After ten years 40,658 38,749 47,484 45,683 191,269 189,676 179,836 180,397 Federal agency collateralized mortgage obligations 5,144 5,030 5,734 5,682 Federal agency mortgage-backed pools 13,699 13,567 14,878 15,006 Total held to maturity investment securities $ 210,112 $ 208,273 $ 200,448 $ 201,085 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. December 31, 2018 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Investment Securities U.S. Treasury and federal agencies $ — $ — $ 9,707 $ (208 ) $ 9,707 $ (208 ) State and municipal 75,163 (1,628 ) 106,335 (4,316 ) 181,498 (5,944 ) Federal agency collateralized mortgage obligations 6,450 (25 ) 106,257 (3,280 ) 112,707 (3,305 ) Federal agency mortgage-backed pools 5,739 (39 ) 175,865 (4,990 ) 181,604 (5,029 ) Corporate notes 5,263 (75 ) — — 5,263 (75 ) Total temporarily impaired securities $ 92,615 $ (1,767 ) $ 398,164 $ (12,794 ) $ 490,779 $ (14,561 ) December 31, 2017 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Investment Securities U.S. Treasury and federal agencies $ 15,882 $ (180 ) $ 2,870 $ (45 ) $ 18,752 $ (225 ) State and municipal 54,312 (2,758 ) 30,691 (844 ) 85,003 (3,602 ) Federal agency collateralized mortgage obligations 54,006 (589 ) 73,462 (2,031 ) 127,468 (2,620 ) Federal agency mortgage-backed pools 103,926 (1,019 ) 86,846 (2,054 ) 190,772 (3,073 ) Private labeled mortgage-backed pools 1,642 (8 ) — — 1,642 (8 ) Total temporarily impaired securities $ 229,768 $ (4,554 ) $ 193,869 $ (4,974 ) $ 423,637 $ (9,528 ) 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, 2018. 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, 2018. Information regarding security proceeds, gross gains and gross losses are presented below. Years Ended December 31 2018 2017 2016 Sales of securities available for sale Proceeds $ 38,519 $ 5,490 $ 182,549 Gross gains 37 151 2,646 Gross losses (480 ) (113 ) (810 ) The tax effect of the proceeds from the sale of securities available for sale was $(93,000), $13,000 and $643,000 for the years ended December 31, 2018, 2017 and 2016, 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, 2018, the Company had pledged $58.8 million of fair value or $60.7 million of amortized cost, in securities as collateral for $52.1 million in repurchase agreements, $96.2 million of fair value or $95.9 million of amortized cost, in securities as collateral for borrowing availability at the Federal Reserve with $0 current outstanding borrowings and $11.1 million of fair value or $11.2 million of amortized cost, in securities as collateral for $ 1.8

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans	Note 5 – Loans December 31 2018 December 31 2017 Commercial Working capital and equipment $ 804,083 $ 720,477 Real estate, including agriculture 834,037 880,861 Tax exempt 48,975 36,324 Other 34,495 32,272 Total 1,721,590 1,669,934 Real estate 1-4 family 659,754 602,196 Other 8,387 7,543 Total 668,141 609,739 Consumer Auto 327,413 244,003 Recreation 13,975 8,728 Real estate/home improvement 39,587 37,052 Home equity 163,209 165,240 Unsecured 4,043 3,479 Other 1,254 2,497 Total 549,481 460,999 Mortgage warehouse 74,120 94,508 Total loans 3,013,332 2,835,180 Allowance for loan losses (17,820 ) (16,394 ) Loans, net $ 2,995,512 $ 2,818,786 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, the general economy or fluctuations in interest rates. 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 mortgage loan funded by Horizon undergoes an underwriting review 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 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 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, 2018 Loan Balance Interest Due Deferred Costs/ (Fees) Recorded Investment Owner occupied real estate $ 561,463 $ 1,240 $ (1,629 ) $ 561,074 Non-owner occupied real estate 717,814 1,063 (1,839 ) 717,038 Residential spec homes 5,199 13 (2 ) 5,210 Development & spec land 46,547 131 (12 ) 46,666 Commercial and industrial 394,346 3,149 (297 ) 397,198 Total commercial 1,725,369 5,596 (3,779 ) 1,727,186 Residential mortgage 646,136 1,861 (2,025 ) 645,972 Residential construction 24,030 42 — 24,072 Mortgage warehouse 74,120 480 — 74,600 Total real estate 744,286 2,383 (2,025 ) 744,644 Direct installment 38,173 103 566 38,842 Indirect installment 314,177 738 — 314,915 Home equity 194,766 973 1,799 197,538 Total consumer 547,116 1,814 2,365 551,295 Total loans 3,016,771 9,793 (3,439 ) 3,023,125 Allowance for loan losses (17,820 ) — — (17,820 ) Net loans $ 2,998,951 $ 9,793 $ (3,439 ) $ 3,005,305 December 31, 2017 Loan Balance Interest Due Deferred Costs/ (Fees) Recorded Investment Owner occupied real estate $ 576,022 $ 1,511 $ (1,917 ) $ 575,616 Non-owner occupied real estate 683,901 1,138 (2,478 ) 682,561 Residential spec homes 16,591 63 (80 ) 16,574 Development & spec land 49,996 117 (579 ) 49,534 Commercial and industrial 349,085 2,572 (607 ) 351,050 Total commercial 1,675,595 5,401 (5,661 ) 1,675,335 Residential mortgage 596,087 1,776 (2,375 ) 595,488 Residential construction 16,027 39 — 16,066 Mortgage warehouse 94,508 480 — 94,988 Total real estate 706,622 2,295 (2,375 ) 706,542 Direct installment 36,737 113 552 37,402 Indirect installment 227,659 528 (168 ) 228,019 Home equity 194,860 889 1,359 197,108 Total consumer 459,256 1,530 1,743 462,529 Total loans 2,841,473 9,226 (6,293 ) 2,844,406 Allowance for loan losses (16,394 ) — — (16,394 ) Net loans $ 2,825,079 $ 9,226 $ (6,293 ) $ 2,828,012

Accounting for Certain Loans Ac

Accounting for Certain Loans Acquired in a Transfer	12 Months Ended
	Dec. 31, 2018
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 with 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, 2018 Commercial Real Estate Consumer Outstanding Balance Allowance for Loan Losses Carrying Amount Heartland $ 232 $ 175 $ — $ 407 $ — $ 407 Summit 323 555 — 878 — 878 Peoples 270 58 — 328 — 328 Kosciusko 746 155 — 901 — 901 LaPorte 753 947 27 1,727 60 1,667 Lafayette 3,080 — — 3,080 — 3,080 Wolverine 7,841 — — 7,841 — 7,841 Total $ 13,245 $ 1,890 $ 27 $ 15,162 $ 60 $ 15,102 December 31, 2017 Commercial Real Estate Consumer Outstanding Balance Allowance for Loan Losses Carrying Amount Heartland $ 390 $ 229 $ — $ 619 $ — $ 619 Summit 3,653 870 — 4,523 — 4,523 Peoples 315 126 — 441 — 441 Kosciusko 838 403 — 1,241 — 1,241 LaPorte 1,034 1,004 33 2,071 — 2,071 Lafayette 4,271 — — 4,271 — 4,271 Wolverine 16,697 — — 16,697 — 16,697 Total $ 27,198 $ 2,632 $ 33 $ 29,863 $ — $ 29,863 Accretable yield, or income expected to be collected are as follows: Twelve Months Ended December 31, 2018 Beginning balance Additions Accretion Reclassification from nonaccretable difference Disposals Ending balance Heartland $ 452 $ — $ (85 ) $ — $ (193 ) $ 174 Summit 147 — (54 ) — (51 ) 42 Kosciusko 386 — (78 ) — (8 ) 300 LaPorte 980 — (144 ) — (7 ) 829 Lafayette 933 — (275 ) — (49 ) 609 Wolverine 2,267 — (812 ) — (757 ) 698 Total $ 5,165 $ — $ (1,448 ) $ — $ (1,065 ) $ 2,652 Twelve Months Ended December 31, 2017 Beginning balance Additions Accretion Reclassification from nonaccretable difference Disposals Ending balance Heartland $ 557 $ — $ (99 ) $ — $ (6 ) $ 452 Summit 502 — (353 ) — (2 ) 147 Peoples 389 — (388 ) — (1 ) — Kosciusko 530 — (101 ) — (43 ) 386 LaPorte 1,479 — (235 ) — (264 ) 980 Lafayette — 933 — — — 933 Wolverine — 2,267 — — — 2,267 Total $ 3,457 $ 3,200 $ (1,176 ) $ — $ (316 ) $ 5,165 During the years ended December 31, 2018 and 2017, the Company increased the allowance for loan losses by a charge to the income statement of $60,000 and $0, respectively. No allowance for loan losses were reversed for the years ended December 31, 2018 and 2017.

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2018
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 using the highest of the one, two or five-year historical loss experience is an appropriate methodology 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. Years Ended December 31 2018 2017 2016 Balance at beginning of the period $ 16,394 $ 14,837 $ 14,534 Loans charged-off: Commercial Owner occupied real estate 112 68 181 Non-owner occupied real estate — 20 471 Residential spec homes — — — Development & spec land — 1 — Commercial and industrial 361 540 106 Total commercial 473 629 758 Real estate Residential mortgage 76 89 213 Residential construction — — — Mortgage warehouse — — — Total real estate 76 89 213 Consumer Direct installment 154 137 329 Indirect installment 1,673 1,193 1,051 Home equity 176 205 309 Total consumer 2,003 1,535 1,689 Total loans charged-off 2,552 2,253 2,660 Recoveries of loans previously charged-off: Commercial Owner occupied real estate 59 9 31 Non-owner occupied real estate 29 32 55 Residential spec homes 8 8 8 Development & spec land — — — Commercial and industrial 80 249 116 Total commercial 176 298 210 Real estate Residential mortgage 27 44 97 Residential construction — — — Mortgage warehouse — — — Total real estate 27 44 97 Consumer Direct installment 53 501 81 Indirect installment 505 497 529 Home equity 311 — 204 Total consumer 869 998 814 Total loan recoveries 1,072 1,340 1,121 Net loans charged-off 1,480 913 1,539 Provision charged to operating expense Commercial 1,699 2,164 (68 ) Real estate (487 ) (81 ) (23 ) Consumer 1,694 387 1,933 Total provision charged to operating expense 2,906 2,470 1,842 Balance at the end of the period $ 17,820 $ 16,394 $ 14,837 Certain loans are individually evaluated for impairment, and the Company’s general practice is to proactively charge down impaired loans to the fair value, which is the appraised value less estimated selling costs, 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 properties and consumer, 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 contractually 90 days past due, and charges down to the net realizable value other secured loans when they are contractually 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, 2018 Commercial Real Estate Mortgage Warehousing Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,035 $ — $ — $ — $ 1,035 Collectively evaluated for impairment 9,460 1,676 1,006 4,643 16,785 Loans acquired with deteriorated credit quality — — — — — Total ending allowance balance $ 10,495 $ 1,676 $ 1,006 $ 4,643 $ 17,820 Loans: Individually evaluated for impairment $ 6,708 $ — $ — $ — $ 6,708 Collectively evaluated for impairment 1,718,661 670,166 74,120 547,116 3,010,063 Loans acquired with deteriorated credit quality — — — — — Total ending loans balance $ 1,725,369 $ 670,166 $ 74,120 $ 547,116 $ 3,016,771 December 31, 2017 Commercial Real Estate Mortgage Warehousing Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 184 $ — $ — $ — $ 184 Collectively evaluated for impairment 8,909 2,188 1,030 4,083 16,210 Loans acquired with deteriorated credit quality — — — — — Total ending allowance balance $ 9,093 $ 2,188 $ 1,030 $ 4,083 $ 16,394 Loans: Individually evaluated for impairment $ 7,187 $ — $ — $ — $ 7,187 Collectively evaluated for impairment 1,668,408 612,114 94,508 459,256 2,834,286 Loans acquired with deteriorated credit quality — — — — — Total ending loans balance $ 1,675,595 $ 612,114 $ 94,508 $ 459,256 $ 2,841,473

Non-performing Assets and Impai

Non-performing Assets and Impaired Loans	12 Months Ended
	Dec. 31, 2018
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, 2018 Non-accrual Loans Past Due Over 90 Days Still Accruing Non-peforming TDRs Performing TDRs Total Non-performing Loans Commercial Owner occupied real estate $ 3,413 $ — $ — $ 109 $ 3,522 Non-owner occupied real estate 554 — 492 — 1,046 Residential spec homes — — — — — Development & spec land 68 — — — 68 Commercial and industrial 2,059 208 — — 2,267 Total commercial 6,094 208 492 109 6,903 Real estate Residential mortgage 2,846 180 423 1,558 5,007 Residential construction — — — — — Mortgage warehouse — — — — — Total real estate 2,846 180 423 1,558 5,007 Consumer Direct installment 35 — — — 35 Indirect installment 916 173 — — 1,089 Home equity 1,657 7 142 335 2,141 Total consumer 2,608 180 142 335 3,265 Total $ 11,548 $ 568 $ 1,057 $ 2,002 $ 15,175 December 31, 2017 Non-accrual Loans Past Due Over 90 Days Still Accruing Non-peforming TDRs Performing TDRs Total Non-performing Loans Commercial Owner occupied real estate $ 4,877 $ — $ 11 $ 1 $ 4,889 Non-owner occupied real estate 115 — 440 — 555 Residential spec homes — — — — — Development & spec land 176 — — — 176 Commercial and industrial 1,734 — — — 1,734 Total commercial 6,902 — 451 1 7,354 Real estate Residential mortgage 3,693 — 351 1,450 5,494 Residential construction — — — 222 222 Mortgage warehouse — — — — — Total real estate 3,693 — 351 1,672 5,716 Consumer Direct installment 160 — — — 160 Direct installment purchased — — — — — Indirect installment 1,041 167 — — 1,208 Home equity 1,480 — 211 285 1,976 Total consumer 2,681 167 211 285 3,344 Total $ 13,276 $ 167 $ 1,013 $ 1,958 $ 16,414 Included in the $11.5 million of non-accrual loans and the $1.1 million of non-performing TDRs at December 31, 2018 were $3.6 million and $0, 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 generally 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 Credit Officer and/or the Chief Operations 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. Non-accrual 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 non-accrual 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 the three methods described above. The Company’s TDRs are considered impaired loans and included in the allowance methodology using the guidance for impaired loans. At December 31, 2018, 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, 2018, the Company had $3.1 million in TDRs and $2.0 million were performing according to the restructured terms and one TDR was returned to accrual status during 2018. There was $20,000 of specific reserves allocated to TDRs at December 31, 2018 based on the collateral deficiencies. The following table presents commercial loans individually evaluated for impairment by class of loans: December 31, 2018 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 2,696 $ 2,689 $ — $ 3,048 $ 71 Non-owner occupied real estate 860 888 — 1,096 12 Residential spec homes — — — — — Development & spec land 68 66 — 71 — Commercial and industrial 1,344 1,337 — 1,239 27 Total commercial 4,968 4,980 — 5,454 110 With an allowance recorded Commercial Owner occupied real estate 827 828 145 864 — Non-owner occupied real estate 186 186 30 180 4 Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial 715 714 860 870 14 Total commercial 1,728 1,728 1,035 1,914 18 Total $ 6,696 $ 6,708 $ 1,035 $ 7,368 $ 128 December 31, 2017 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 3,824 $ 3,849 $ — $ 1,673 $ 11 Non-owner occupied real estate 554 570 — 345 — Residential spec homes — — — — — Development & spec land 176 174 — 233 4 Commercial and industrial 1,656 1,663 — 1,445 25 Total commercial 6,210 6,256 — 3,696 40 With an allowance recorded Commercial Owner occupied real estate 931 931 184 78 46 Non-owner occupied real estate — — — — — Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial — — — — — Total commercial 931 931 184 78 46 Total $ 7,141 $ 7,187 $ 184 $ 3,774 $ 86 December 31, 2016 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 1,533 $ 1,533 $ — $ 1,619 $ 58 Non-owner occupied real estate 440 440 — 871 18 Residential spec homes — — — — — Development & spec land 118 118 — 61 16 Commercial and industrial 128 127 — 349 1 Total commercial 2,219 2,218 — 2,900 93 With an allowance recorded Commercial Owner occupied real estate — — — — — Non-owner occupied real estate — — — — — Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial 31 32 4 5 2 Total commercial 31 32 4 5 2 Total $ 2,250 $ 2,250 $ 4 $ 2,905 $ 95 The following table presents the payment status by class of loans: December 31, 2018 Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Total Past Due & Non-accrual Loans Total Commercial Owner occupied real estate $ 556,516 $ 537 $ 997 $ — $ 3,413 $ 4,947 $ 561,463 Non-owner occupied real estate 716,574 175 19 — 1,046 1,240 717,814 Residential spec homes 4,707 492 — — — 492 5,199 Development & spec land 46,479 — — — 68 68 46,547 Commercial and industrial 390,828 515 736 208 2,059 3,518 394,346 Total commercial 1,715,104 1,719 1,752 208 6,586 10,265 1,725,369 Real estate Residential mortgage 641,500 1,131 56 180 3,269 4,636 646,136 Residential construction 24,030 — — — — — 24,030 Mortgage warehouse 74,120 — — — — — 74,120 Total real estate 739,650 1,131 56 180 3,269 4,636 744,286 Consumer Direct installment 38,138 93 18 — 35 35 38,173 Indirect installment 313,088 1,396 198 173 916 1,089 314,177 Home equity 192,960 761 37 7 1,799 1,806 194,766 Total consumer 544,186 2,250 253 180 2,750 2,930 547,116 Total $ 2,998,940 $ 5,100 $ 2,061 $ 568 $ 12,605 $ 17,831 $ 3,016,771 Percentage of total loans 99.41 % 0.17 % 0.07 % 0.02 % 0.42 % 0.59 % December 31, 2017 Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Total Past Due & Non-accrual Loans Total Commercial Owner occupied real estate $ 567,571 $ 1,613 $ 1,950 $ — $ 4,888 $ 8,451 $ 576,022 Non-owner occupied real estate 682,712 512 122 — 555 1,189 683,901 Residential spec homes 16,591 — — — — — 16,591 Development & spec land 49,789 31 — — 176 207 49,996 Commercial and industrial 346,830 520 1 — 1,734 2,255 349,085 Total commercial 1,663,493 2,676 2,073 — 7,353 12,102 1,675,595 Real estate Residential mortgage 590,746 1,248 49 — 4,044 5,341 596,087 Residential construction 15,964 63 — — — 63 16,027 Mortgage warehouse 94,508 — — — — — 94,508 Total real estate 701,218 1,311 49 — 4,044 5,404 706,622 Consumer Direct installment 36,489 78 10 — 160 248 36,737 Indirect installment 224,348 1,859 244 167 1,041 3,311 227,659 Home equity 192,140 502 527 — 1,691 2,720 194,860 Total consumer 452,977 2,439 781 167 2,892 6,279 459,256 Total $ 2,817,688 $ 6,426 $ 2,903 $ 167 $ 14,289 $ 23,785 $ 2,841,473 Percentage of total loans 99.16 % 0.23 % 0.10 % 0.01 % 0.50 % 0.84 % 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 $3,500,000) • Commercial loan officers are responsible for reviewing their loan portfolios and report any adverse material change to the CCBO or Loan Committee. When circumstances warrant a change in the credit quality grade, loan officers are required to notify the CCBO and the Credit Department of the change in the loan grade. Downgrades are accepted immediately by the CCBO, however, lenders must present their factual information to either the Loan Committee or the CCBO when recommending an upgrade. • The CCBO, 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 to 120 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 level of risk and (2) weaknesses are considered “potential,” not “defined,” impairments to the primary source of repayment. These loans may be to borrowers with adverse trends in financial performance, collateral value and/or marketability, or balance sheet strength. 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, 2018 Pass Special Mention Substandard Doubtful Total Commercial Owner occupied real estate $ 538,177 $ 6,618 $ 16,668 $ — $ 561,463 Non-owner occupied real estate 702,269 9,682 5,863 — 717,814 Residential spec homes 5,199 — — — 5,199 Development & spec land 46,382 97 68 — 46,547 Commercial and industrial 379,607 6,655 8,084 — 394,346 Total commercial 1,671,634 23,052 30,683 — 1,725,369 Real estate Residential mortgage 641,309 — 4,827 — 646,136 Residential construction 24,030 — — — 24,030 Mortgage warehouse 74,120 — — — 74,120 Total real estate 739,459 — 4,827 — 744,286 Consumer Direct installment 38,138 — 35 — 38,173 Indirect installment 313,088 — 1,089 — 314,177 Home equity 192,625 — 2,141 — 194,766 Total consumer 543,851 — 3,265 — 547,116 Total $ 2,954,944 $ 23,052 $ 38,775 $ — $ 3,016,771 Percentage of total loans 97.95 % 0.76 % 1.29 % 0.00 % December 31, 2017 Pass Special Mention Substandard Doubtful Total Commercial Owner occupied real estate $ 549,198 $ 8,622 $ 18,202 $ — $ 576,022 Non-owner occupied real estate 675,030 3,864 5,007 — 683,901 Residential spec homes 16,591 — — — 16,591 Development & spec land 48,884 886 226 — 49,996 Commercial and industrial 327,970 7,448 13,667 — 349,085 Total commercial 1,617,673 20,820 37,102 — 1,675,595 Real estate Residential mortgage 590,593 — 5,494 — 596,087 Residential construction 15,805 — 222 — 16,027 Mortgage warehouse 94,508 — — — 94,508 Total real estate 700,906 — 5,716 — 706,622 Consumer Direct installment 36,577 — 160 — 36,737 Indirect installment 226,451 — 1,208 — 227,659 Home equity 192,884 — 1,976 — 194,860 Total consumer 455,912 — 3,344 — 459,256 Total $ 2,774,491 $ 20,820 $ 46,162 $ — $ 2,841,473 Percentage of total loans 97.64 % 0.73 % 1.62 % 0.00 %

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 9 – Premises and Equipment December 31 2018 December 31 2017 Land $ 21,604 $ 21,633 Buildings and improvements 69,590 68,447 Furniture and equipment 24,596 22,288 Total cost 115,790 112,368 Accumulated depreciation (41,459 ) (36,839 ) Net premises and equipment $ 74,331 $ 75,529

Loan Servicing

Loan Servicing	12 Months Ended
	Dec. 31, 2018
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 $1.299 billion and $1.310 billion at December 31, 2018 and 2017. The aggregate fair value of capitalized mortgage servicing rights was approximately $13.9 million, $12.8 million, and $12.1 million at December 31, 2018, 2017 and 2016, compared to the carrying values of $12.3 million, $11.6 million and $11.1 million, respectively. The fair value of capitalized mortgage servicing rights was approximately $8.9 million on January 1, 2016. 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 2018 December 31 2017 December 31 2016 Mortgage servicing rights Balances, January 1 $ 12,189 $ 11,681 $ 9,271 Servicing rights capitalized 1,883 2,109 3,426 Amortization of servicing rights (1,196 ) (1,601 ) (1,016 ) Balances, December 31 12,876 12,189 11,681 Impairment allowance Balances, January 1 (587 ) (507 ) (397 ) Additions (78 ) (85 ) (236 ) Reductions 138 5 126 Balances, December 31 (527 ) (587 ) (507 ) Mortgage servicing rights, net $ 12,349 $ 11,602 $ 11,174 During 2018, the Bank reduced the impairment allowance approximately $60,000. During 2017 and 2016, the Bank recorded additional impairment of approximately $80,000 and $110,000, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Note 11 – Goodwill and Intangible Assets On October 17, 2017, the Wolverine acquisition resulted in goodwill of $26.8 million. On September 1, 2017, the Lafayette acquisition resulted in goodwill of $15.4 million. On November 7, 2016, the CNB acquisition resulted in goodwill of $609,000. On July 18, 2016, the LaPorte acquisition resulted in goodwill of $21.0 million. On June 1, 2016, the Kosciusko acquisition resulted in goodwill of $6.4 million. No impairment loss was recorded in 2018 or 2017. The Company tested goodwill for impairment during 2018 and 2017. 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. December 31 2018 December 31 2017 Balance, January 1 $ 119,880 $ 76,941 Goodwill acquired — 42,939 Balance, December 31 $ 119,880 $ 119,880 Goodwill acquired in 2017 includes a $ 704 As a result of the acquisition of American Trust & Savings Bank in 2010; Heartland in 2012; Summit in 2014; Peoples in 2015; Kosciusko, LaPorte and CNB in 2016; and Lafayette and Wolverine in 2017; the Company has recorded certain amortizable intangible assets related to core deposit intangibles. These core deposit intangibles are being amortized over seven to ten years using an accelerated method. Amortizable intangible assets are summarized as follows: December 31, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortizable intangible assets Core deposit intangible $ 20,711 $ (10,321 ) $ 20,711 $ (8,309 ) Amortization expense for intangible assets totaled $2.0 million, $1.5 million, and $1.2 million for the years ended December 31, 2018, 2017 and 2016. Estimated amortization for the years ending December 31 is as follows: 2019 $ 1,787 2020 1,481 2021 1,394 2022 1,375 2023 1,281 Thereafter 3,072 $ 10,390

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposits	Note 12 – Deposits December 31 2018 December 31 2017 Noninterest-bearing demand deposits $ 642,129 $ 601,805 Interest-bearing demand deposits 864,026 909,638 Money market (variable rate) 420,123 378,108 Savings deposits 400,187 424,500 Certificates of deposit of $250,000 or more 371,824 130,585 Other certificates and time deposits 441,087 436,367 Total deposits $ 3,139,376 $ 2,881,003 Certificates and other time deposits for both retail and brokered maturing in years ending December 31 are as follows: Retail Brokered Total 2019 $ 498,382 $ 27,565 $ 525,947 2020 112,944 24,530 137,474 2021 48,422 20,535 68,957 2022 16,029 15,256 31,285 2023 14,052 16,698 30,750 Thereafter 18,498 — 18,498 $ 708,327 $ 104,584 $ 812,911

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowings	Note 13 – Borrowings December 31 December 31 2018 2017 Federal Home Loan Bank advances, variable and fixed rates ranging from 1.51% to 7.53%, due at various dates through November 15, 2024 $ 356,579 $ 336,308 Securities sold under agreements to repurchase 52,116 61,097 Federal Reserve Bank discount window — 11,000 Federal funds purchased 141,689 143,252 Notes payable, variable rate of 2.75%, due at various dates through July 13, 2019 — 12,500 Total borrowings $ 550,384 $ 564,157 The Federal Home Loan Bank advances are secured by first and second mortgage loans and mortgage warehouse loans totaling approximately $634.0 million. Advances are subject to restrictions or penalties in the event of prepayment. At December 31, 2018, the Bank had available approximately $340.3 million in credit lines with various money center banks, including the FHLB. Contractual maturities in years ending December 31 are as follows: 2019 $ 485,557 2020 37,472 2021 5,042 2022 12,154 2023 114 Thereafter 10,045 $ 550,384

Repurchase Agreements

Repurchase Agreements	12 Months Ended
	Dec. 31, 2018
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. Securities sold under agreements to repurchase are secured by federal agency collateralized mortgage obligations and mortgage-backed pools. The following table shows repurchase agreements accounted for as secured borrowings: December 31, 2018 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to one year One to three years Three to five years Five to ten years Beyond ten years Total Repurchase Agreements and repurchase-to-maturity transactions Repurchase Agreements $ 52,116 $ — $ — $ — $ — $ — $ 52,116 Securities pledged for Repurchase Agreements Federal agency collateralized mortgage obligations $ 31,454 $ — $ — $ — $ — $ — $ 31,454 Federal agency mortgage-backed pools 27,354 — — — — — 27,354 Total $ 58,808 $ — $ — $ — $ — $ — $ 58,808 Securities sold under agreements to repurchase consist of obligations of the Bank to other parties. The obligations are secured by 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 2018 and 2017 totaled $61.4 million and $63.1 million and the daily average of such agreements totaled $51.4 million and $55.2 million. The agreements at December 31, 2018 are overnight agreements.

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2018
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 4.75 October 21, 2034 October 31, 2009 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 4.45 January 30, 2037 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 5.45 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 5.65 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 4.47 The Company assumed additional debentures as the result of the LaPorte merger in July 2016. In October 2007, LaPorte assumed debentures as the result of its acquisition of City Savings Financial Corporation (“City Savings”). In June 2003, City Savings formed City Savings Statutory Trust I a wholly owned business trust (“City Savings Trust”), to sell $5.0 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 City Savings. The junior subordinated debentures are the sole assets of City Savings 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 3.10 5.90 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, 2018
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 Employee 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 $750,000 in 2018, $600,000 in 2017 and $550,000 in 2016. The ESOP, which is not leveraged, owns a total of 1,376,821 shares of Horizon’s stock or 3.6% of the outstanding

Employee Thrift and Defined Ben

Employee Thrift and Defined Benefit Plan	12 Months Ended
	Dec. 31, 2018
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 $1.2 million in 2018, $942,000 in 2017 and $785,000 in 2016. The Plan owns a total of 742,250 shares of Horizon’s stock or 1.9% of the outstanding 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 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 2018 and 2017 for this Pentegra Plan. The Company intends on terminating this Pentegra Plan during 2019 and has recorded a $3.2 million withdrawal liability for the termination of the Pentegra Plan.

Income Tax

Income Tax	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax	Note 18 – Income Tax December 31 2018 December 31 2017 December 31 2016 Income tax expense Currently payable Federal $ 9,166 $ 12,079 $ 7,467 Deferred Federal 1,277 331 1,334 Revaluation of deferred tax assets — 2,426 — Total income tax expense $ 10,443 $ 14,836 $ 8,801 Reconciliation of federal statutory to actual tax expense Federal statutory income tax at 21% in 2018 and 35 $ 13,348 $ 16,783 $ 11,450 Tax exempt interest (1,982 ) (2,699 ) (1,882 ) Tax exempt income (448 ) (638 ) (575 ) Stock compensation (384 ) (546 ) — Revaluation of deferred tax assets — 2,426 — Other tax exempt income (260 ) (456 ) (608 ) Nondeductible and other 169 (34 ) 416 Actual tax expense $ 10,443 $ 14,836 $ 8,801 December 31 2018 December 31 2017 Assets Allowance for loan losses $ 3,831 $ 3,396 Net operating loss and tax credits (from acquisitions) 1,038 1,658 Director and employee benefits 2,392 2,276 Unrealized loss on AFS securities and fair value hedge 2,165 1,147 Accrued pension 801 852 Fair value adjustment on acquisitions — 1,087 Other 670 1,083 Total assets 10,897 11,499 Liabilities Depreciation (1,850 ) (1,680 ) State tax (137 ) (210 ) Federal Home Loan Bank stock dividends (330 ) (339 ) Difference in basis of intangible assets (2,919 ) (2,831 ) Fair value adjustment on acquisitions (62 ) — Other (119 ) (125 ) Total liabilities (5,417 ) (5,185 ) Valuation allowance (1,038 ) (1,613 ) Net deferred tax asset $ 4,442 $ 4,701 The Tax Cuts and Jobs Act (the “Act”) was enacted in December 2017. The Act reduced the U.S. federal corporate tax rate from 35 percent to 21 percent. As of December 31, 2017 21 %. As of December 31, 2018, the Company had approximately $13.9 million income. The state loss carryforward begins to expire in 2031. Due to these losses being incurred by acquired institutions, 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 the state loss carryforwards within the allotted time periods, except for the amount represented by the valuation allowance. The valuation allowance has been recorded for the possible inability to use a portion of the state net operating loss carryover. Retained earnings of the Bank include approximately $12.8 million for which no deferred income tax liability has been recognized. This amount represents an allocation of previously acquired institutions income to bad debt deductions as of December 31, 1987 for tax purposes only. Reductions of amounts so allocated for purposes other than tax bad debt losses including redemption of bank stock or excess dividends, or loss of “bank” status would create income for tax purposes only, which would be subject to the then-current corporate income tax rate. The unrecorded deferred income tax liability on the above amount for the Company was approximately $2.7 million at December 31, 2018. 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 2015.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Loss	Note 19 – Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss included in capital are as follows: December 31 2018 December 31 2017 Unrealized loss on securities available for sale $ (8,561 ) $ (3,937 ) Unamortized gain on securities held to maturity, previously transferred from AFS 10 200 Unrealized loss on derivative instruments (1,760 ) (1,728 ) Tax effect 2,167 1,914 Total accumulated other comprehensive loss $ (8,144 ) $ (3,551 )

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Risk and Contingencies	12 Months Ended
	Dec. 31, 2018
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 not required to have any cash on deposit with the Federal Reserve Bank to meet regulatory reserve and clearing balance requirements at December 31, 2018. These balances would be included in cash and cash equivalents and would 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, 2018 and 2017, commitments to make loans amounted to approximately $873.8 million and $802.9 million and commitments under outstanding standby letters of credit amounted to approximately $4.8 million and $3.4 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, 2018
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’s 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, 2018 and 2017, 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. 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 and Tier I leverage ratios as set forth in the table below. As of December 31, 2018 and December 31, 2017, 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 December 31, 2018 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, 2018 and 2017 were as follows: Actual Required for Capital 1 ‎ Adequacy Purposes Required For Capital 1 ‎ Adequacy Purposes ‎ with Capital Buffer Well Capitalized Under ‎ Prompt 1 Corrective Action ‎ Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio December 31, 2018 Total capital 1 Consolidated $ 427,616 13.39 % $ 255,419 8.00 % $ 315,283 9.875 % N/A N/A Bank 396,755 12.43 % 255,419 8.00 % 315,283 9.875 % $ 319,274 10.00 % Tier 1 capital 1 Consolidated 409,760 12.83 % 191,565 6.00 % 251,429 7.875 % N/A N/A Bank 378,899 11.87 % 191,565 6.00 % 251,429 7.875 % 255,420 8.00 % Common equity tier 1 capital 1 Consolidated 371,297 11.63 % 143,673 4.50 % 203,537 6.375 % N/A N/A Bank 378,899 11.87 % 143,674 4.50 % 203,537 6.375 % 207,528 6.50 % Tier 1 capital 1 Consolidated 409,760 10.12 % 162,033 4.00 % 162,033 4.000 % N/A N/A Bank 378,899 9.34 % 162,327 4.00 % 162,327 4.000 % 202,908 5.00 % December 31, 2017 Total capital 1 Consolidated $ 384,800 12.91 % $ 238,543 8.00 % $ 275,816 9.25 % N/A N/A Bank 382,788 12.85 % 238,386 8.00 % 275,634 9.25 % $ 297,982 10.00 % Tier 1 capital 1 Consolidated 368,355 12.35 % 178,907 6.00 % 216,180 7.25 % N/A N/A Bank 366,343 12.29 % 178,790 6.00 % 216,038 7.25 % 238,386 8.00 % Common equity tier 1 capital 1 Consolidated 329,892 11.06 % 134,181 4.50 % 171,454 5.75 % N/A N/A Bank 366,343 12.29 % 134,092 4.50 % 171,340 5.75 % 193,689 6.50 % Tier 1 capital 1 Consolidated 368,355 9.92 % 148,503 4.00 % 148,503 4.00 % N/A N/A Bank 366,343 9.89 % 148,116 4.00 % 148,116 4.00 % 185,145 5.00 % The above minimum capital requirements exclude the capital conservation buffer required to avoid limitations on capital distributions, including dividend payments and certain discretionary bonus payments to executive officers. The capital conservation buffer is being phased in from 0.0% for 2015 to 2.50% by 2019. The capital conservation buffer was 1.875% at December 31, 2018. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2018
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 759,375 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 759,375 for incentive stock options and to 379,687 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”) determined. 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 Plan making an additional 885,937 common shares available for issuance. All share data has been adjusted for the 3:2 stock split on June 15, 2018 (and for four additional stock splits in 2003, 2011, 2012 and 2016 after the 2003 Plan was adopted). A summary of option activity under the 2003 Plan as of December 31, 2018, and changes during the year then ended, is presented below: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, beginning of year 41,175 $ 4.91 Exercised (19,875 ) 4.80 Outstanding, end of year 21,300 5.03 1.77 $ 229,004 Exercisable, end of year 21,300 5.03 1.77 229,004 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 1,556,325 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 225,000 for incentive stock options and to 900,000 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. All share data has been adjusted for the 3:2 stock split on June 15, 2018 and November 14, 2016. 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 5 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: Years Ended December 31 2018 2017 2016 Dividend yields 1.99 % 1.75 % 2.34 % Volatility factors of expected market price of common stock 28.60 % 28.52 % 28.60 % Risk-free interest rates 2.85 % 2.42 % 1.83 % Expected life of options 8 8 8 A summary of option activity under the 2013 Plan as of December 31, 2018, and changes during the year then ended, is presented below: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, beginning of year 323,666 $ 11.50 Granted 31,122 19.31 Exercised (36,221 ) 10.34 Forfeited (11,250 ) 15.60 Outstanding, end of year 307,317 12.28 6.89 $ 1,077,096 Exercisable, end of year 191,410 10.67 6.19 977,748 The weighted average grant-date fair value of options granted during the years 2018, 2017 and 2016 was $5.54, $4.83 and $2.59. A summary of the status of Horizon’s non-vested restricted and performance shares as of December 31, 2018 are presented below: Shares Weighted Average Grant Date Fair Value Non-vested, beginning of year 144,791 $ 13.32 Vested (43,519 ) 10.59 Granted 75,266 20.13 Non-vested, end of year 176,538 16.90 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 2018 was $251,000 and the related tax benefit recognized was approximately $53,000. Total compensation cost recognized in the income statement for option-based payment arrangements during 2017 and 2016 was $325,000 and $324,000 and the related tax benefit recognized was $114,000 and $113,000, respectively. Total compensation cost recognized in the income statement for restricted share and performance share based payment arrangements during 2018, 2017 and 2016 was $376,000, $135,000, and $284,000. The recognized tax benefit related thereto was approximately $79,000, $47,000, and $99,000 for the years ended December 31, 2018, 2017 and 2016. Cash received from option exercise under all share-based payment arrangements for the years ended December 31, 2018, 2017 and 2016 was $493,000, $1.6 million, and $214,000. The actual tax benefit realized for the tax deductions from option exercise of the share-based payment arrangements totaled $213,000, $522,000, and $158,000, for the years ended December 31, 2018, 2017 and 2016. As of December 31, 2018, there was $1.5 million 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. Under all plans, forfeitures of share-based compensation grants are recognized as they occur. On December 19, 2017, the Board of Directors proposed adoption of the Amended and Restated 2013 Omnibus Equity Incentive Plan, primarily to allow awards of “Other Stock Based Awards,” which includes awards valued in whole or in part by reference to Horizon’s common shares. The Amended and Restated 2013 Omnibus Equity Incentive Plan was approved by the shareholders at the Annual Meeting held on May 3, 2018.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2018
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 3.76% on a notional amount of $30.5 million at December 31, 2018 and 2017. Under the agreements, the Company pays or receives the net interest amount monthly, with the monthly settlements included in interest expense. The Company assumed additional interest rate swap agreements as the result of the LaPorte acquisition in July 2016. The agreements provide for the Company to receive interest from the counterparty at one month LIBOR and to pay interest to the counterparty at a weighted average fixed rate of 2.31% on a notional amount of $30.0 million at December 31, 2018 and 2017. Under the agreements, the Company pays or receives the net interest amount monthly, with the monthly settlements included in interest expense. On July 20, 2018, the Company entered into an interest rate swap agreement for an additional portion of its floating rate debt. The agreement provides for the Company to receive interest from the counterparty at one month LIBOR and to pay interest to the counter party at a rate of 2.81% on a notional amount of $50.0 million at December 31, 2018. Under the agreement, 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 agreements as cash flow hedging instruments. 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, 2018, 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, 2018, 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 $209.2 million at December 31, 2018 and $154.6 million at December 31, 2017. 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, 2018, 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 Liability Derivatives December 31, 2018 December 31, 2018 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest rate contracts Loans $ — Loans $ 42 Interest rate contracts Other Assets 42 Other liabilities 1,760 Total derivatives desginated as hedging instruments 42 1,802 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 135 Other liabilities — Total derivatives not designated as hedging instruments 135 — Total derivatives $ 177 $ 1,802 Asset Derivatives Liability Derivatives December 31, 2017 December 31, 2017 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest rate contracts Loans $ — Loans $ 811 Interest rate contracts Other Assets 811 Other liabilities 1,728 Total derivatives desginated as hedging instruments 811 2,539 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 143 Other liabilities 3 Total derivatives not designated as hedging instruments 143 3 Total derivatives $ 954 $ 2,542 The effect of the derivative instruments on the consolidated statement of income for the 12-month periods ended December 31 is as follows: Amount of (Gain) Loss Recognized in Other Derivative (Effective Portion) (Effective Portion) Years Ended December 31 2018 2017 2016 Derivatives in cash flow hedging relationship Interest rate contracts $ (25 ) $ 913 $ 6 FASB ASC 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. ASC 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) Location of gain (loss) Years Ended December 31 recognized on derivative 2018 2017 2016 Derivative in fair value hedging relationship Interest rate contracts Interest income - loans $ (852 ) $ (817 ) $ (1,776 ) Interest rate contracts Interest income - loans 852 817 1,776 Total $ — $ — $ — Amount of Gain (Loss) Location of gain (loss) Years Ended December 31 recognized on derivative 2018 2017 2016 Derivative not designated as hedging relationship Mortgage contracts Other income - $ (5 ) $ (439 ) $ (62 )

Disclosures about fair value of

Disclosures about fair value of assets and liabilities	12 Months Ended
	Dec. 31, 2018
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, 2018. 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: December 31, 2018 Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Treasury and federal agencies $ 16,608 $ — $ 16,608 $ — State and municipal 209,303 — 209,303 — Federal agency collateralized mortgage obligations 185,003 — 185,003 — Federal agency mortgage-backed pools 178,736 — 178,736 — Corporate notes 10,698 — 10,698 — Total available for sale securities 600,348 — 600,348 — Hedged loans 209,161 — 209,161 — Forward sale commitments 135 — 135 — Interest rate swap agreements (1,801 ) — (1,801 ) — Commitments to originate loans — — — — December 31, 2017 Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Treasury and federal agencies $ 19,052 $ — $ 19,052 $ — State and municipal 149,564 — 149,564 — Federal agency collateralized mortgage obligations 130,365 — 130,365 — Federal agency mortgage-backed pools 208,657 — 208,657 — Private labeled mortgage-backed pools 1,642 — 1,642 — Corporate notes 385 — 385 — Total available for sale securities 509,665 — 509,665 — Hedged loans 154,575 — 154,575 — Forward sale commitments 143 — 143 — Interest rate swap agreements (917 ) — (917 ) — Commitments to originate loans (3 ) — (3 ) — Realized gains and losses included in net income for the periods are reported in the consolidated statements of income as follows: Years Ended December 31 2018 2017 2016 Non-interest Income Total gains and losses from: Hedged loans $ (852 ) $ (817 ) $ (1,776 ) Fair value interest rate swap agreements 852 817 1,776 Derivative loan commitments (5 ) (439 ) (62 ) $ (5 ) $ (439 ) $ (62 ) 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 Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2018 Impaired loans $ 5,661 $ — $ — $ 5,661 Mortgage servicing rights 12,349 — — 12,349 December 31, 2017 Impaired loans $ 6,957 $ — $ — $ 6,957 Mortgage servicing rights 11,602 — — 11,602 Impaired (collateral dependent): Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms 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. 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): MSRs do not trade in an active market with readily observable prices. Accordingly, the fair value of these assets is classified as Level 3. The Company determines the fair value of MSRs using an income approach model based upon the Company’s month-end interest rate curve and prepayment assumptions. The model utilizes assumptions to estimate future net servicing income cash flows, including estimates of time decay, payoffs and changes in valuation inputs and assumptions. The Company reviews the valuation assumptions against this market data for reasonableness and adjusts the assumptions if deemed appropriate. The carrying amount of the MSRs were reduced by $527,000 in 2018 and $587,000 in 2017 for the fair value. 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, 2018 and 2017. December 31, 2018 Fair Valuation Unobservable Range Value Technique Inputs (Weighted Average) Impaired loans $ 5,661 Collateral based measurement Discount to reflect current market conditions and ultimate collectability 0 100 15.5 Mortgage servicing rights 12,349 Discounted cash flows Discount rate, Constant prepayment rate, Probability of default 10.2 11.0 ( 10.3 9.1 21.9 9.3 December 31, 2017 Fair Valuation Unobservable Range Value Technique Inputs (Weighted Average) Impaired loans $ 6,957 Collateral based measurement Discount to reflect current market conditions and ultimate collectability 0 46.8 2.6 Mortgage servicing rights 11,602 Discounted cash flows Discount rate, Constant prepayment rate, Probability of default 9.6 10.8 9.7 9.2 27.7 10.5 0 1.5 0.2

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
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, 2018 and December 31, 2017. 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 — The carrying amounts approximate fair value. Held-to-Maturity Securities — For debt securities held to maturity, fair values are based on quoted market prices or dealer quotes. For those securities where a quoted market price is not available, carrying amount is a reasonable estimate of fair value based upon comparison with similar securities. Loans Held for Sale — The carrying amounts approximate fair value. Net Loans FHLB Stock Interest Receivable/Payable — The carrying amounts approximate fair value. Deposits — The fair value of demand deposits, savings accounts, interest-bearing checking accounts and money market deposits is the amount payable on demand at the reporting date. The fair value of fixed maturity certificates of deposit is estimated by discounting the future cash flows using rates currently offered for deposits of similar remaining maturity. Borrowings — Rates currently available to Horizon for debt with similar terms and remaining maturities are used to estimate fair values of existing borrowings. Subordinated Debentures — Rates currently available for debentures with similar terms and remaining maturities are used to estimate fair values of existing debentures. Commitments to Extend Credit and Standby Letters of Credit — The fair value of commitments is estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value of letters of credit is based on fees currently charged for similar agreements or on the estimated cost to terminate them or otherwise settle the obligations with the counterparties at the reporting date. Due to the short-term nature of these agreements, carrying amounts approximate fair value. 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, 2018 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Cash and due from banks $ 58,492 $ 58,492 $ — $ — Interest-earning time deposits 15,744 — 15,542 — Investment securities, held to maturity 210,112 — 208,273 — Loans held for sale 1,038 — — 1,038 Loans (excluding loan level hedges), net 2,786,351 — — 2,681,741 Stock in FHLB 18,073 — 18,073 — Interest receivable 14,239 — 14,239 — Liabilities Non-interest bearing deposits $ 642,129 $ 642,129 $ — $ — Interest bearing deposits 2,497,247 — 2,377,274 — Borrowings 550,384 — 542,311 — Subordinated debentures 37,837 — 35,711 — Interest payable 2,031 — 2,031 — December 31, 2017 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Cash and due from banks $ 76,441 $ 76,441 $ — $ — Interest-earning time deposits 16,461 — 16,632 — Investment securities, held to maturity 200,448 — 201,085 — Loans held for sale 3,094 — — 3,094 Loans (excluding loan level hedges), net 2,664,211 — — 2,589,064 Stock in FHLB 18,105 — 18,105 — Interest receivable 13,059 — 13,059 — Liabilities Non-interest bearing deposits $ 601,805 $ 601,805 $ — $ — Interest bearing deposits 2,279,198 — 2,156,487 — Borrowings 564,157 — 560,057 — Subordinated debentures 37,653 — 35,994 — Interest payable 886 — 886 —

General Litigation

General Litigation	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
General Litigation	Note 26 – 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 of operations and cash flows of the Company.

Condensed Financial Information

Condensed Financial Information (Parent Company Only)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information (Parent Company Only)	Note 27 – 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, Inc.: Condensed Balance Sheets December 31 2018 December 31 2017 Assets Total cash and cash equivalents $ 30,653 $ 13,361 Investment in subsidiaries 502,844 497,623 Other assets 1,186 1,318 Total assets $ 534,683 $ 512,302 Liabilities Borrowings $ — $ 12,500 Subordinated debentures 37,837 37,653 Other liabilities 4,854 5,071 Stockholders’ Equity 491,992 457,078 Total liabilities and stockholders’ equity $ 534,683 $ 512,302 Condensed Statements of Income Years Ended December 31 2018 2017 2016 Operating Income (Expense) Dividend income from subsidiaries $ 46,950 $ 27,000 $ 20,000 Investment income — — 33 Other income — 540 42 Interest expense (2,475 ) (2,791 ) (2,376 ) Employee benefit expense (1,423 ) (1,094 ) (1,158 ) Other expense (357 ) (326 ) 1,279 Income Before Undistributed Income of Subsidiaries 42,695 23,329 17,820 Undistributed Income of Subsidiaries 9,643 8,804 5,938 Income Before Tax 52,338 32,133 23,758 Income Tax Benefit 779 984 154 Net Income 53,117 33,117 23,912 Preferred stock dividend — — (42 ) Net Income Available to Common Shareholders $ 53,117 $ 33,117 $ 23,870 Condensed Statements of Comprehensive Income Years Ended December 31 2018 2017 2016 Net Income $ 53,117 $ 33,117 $ 23,912 Other Comprehensive Income (Loss) Change in fair value of derivative instruments, net of taxes (25 ) 913 6 Unrealized appreciation for the period on held to maturity securities, net of taxes (150 ) (166 ) (424 ) Unrealized appreciation (depreciation) on available for sale securities, net of taxes (4,003 ) 1,371 (3,310 ) Less: reclassification adjustment for realized (gains) losses included in net income, net of taxes 351 (25 ) (1,193 ) (3,827 ) 2,093 (4,921 ) Comprehensive Income $ 49,290 $ 35,210 $ 18,991 Condensed Statements of Cash Flows Years Ended December 31 2018 2017 2016 Operating Activities Net income $ 53,117 $ 33,117 $ 23,912 Items not requiring (providing) cash Equity in undistributed net income of subsidiaries (9,643 ) (8,804 ) (5,938 ) Change in: Share based compensation 251 325 284 Amortization of unearned compensation 169 135 324 Other assets 132 388 888 Other liabilities 378 (1,675 ) (244 ) Net cash provided by operating activities 44,404 23,486 19,226 Investing Activities Acquisition of Kosciusko — — (6,741 ) Acquisition of LaPorte — — (17,108 ) Acquisition of CNB — — (5,296 ) Acquisition of Lafayette — (1,254 ) — Acquisition of Wolverine — (7,688 ) — Net cash used in investing activities — (8,942 ) (29,145 ) Financing Activities Redemption of preferred stock — — (12,500 ) Net change in borrowings (12,316 ) (6,803 ) 19,500 Dividends paid on preferred shares — — (42 ) Dividends paid on common shares (15,418 ) (11,720 ) (8,382 ) Proceeds from issuance of stock 622 1,604 572 Net cash used in financing activities (27,112 ) (16,919 ) (852 ) Net Change in Cash and Cash Equivalents 17,292 (2,375 ) (10,771 ) Cash and Cash Equivalents at Beginning of Year 13,361 15,736 26,507 Cash and Cash Equivalents at End of Year $ 30,653 $ 13,361 $ 15,736

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Note 28 – Quarterly Results of Operations (Unaudited) The following is a summary of the quarterly consolidated results of operations: Three Months Ended March 31 June 30 September 30 December 31 2018 2018 2018 2018 Interest income $ 39,426 $ 40,741 $ 42,271 $ 43,730 Interest expense 6,015 7,191 8,499 9,894 Net interest income 33,411 33,550 33,772 33,836 Provision for loan losses 567 635 1,176 528 Gain (loss) on sale of securities 11 — (122 ) (332 ) Net income $ 12,804 $ 14,115 $ 13,065 $ 13,133 Earnings per share: Basic $ 0.33 $ 0.37 $ 0.34 $ 0.35 Diluted 0.33 0.37 0.34 0.34 Average shares outstanding: Basic 38,306,395 38,347,612 38,365,379 38,367,972 Diluted 38,468,810 38,519,401 38,534,970 38,488,861 Three Months Ended March 31 June 30 September 30 December 31 2017 2017 2017 2017 Interest income $ 28,834 $ 30,805 $ 32,070 $ 36,774 Interest expense 3,266 3,607 4,191 5,319 Net interest income 25,568 27,198 27,879 31,455 Provision for loan losses 330 330 710 1,100 Gain on sale of securities 35 (3 ) 6 — Net income $ 8,224 $ 9,072 $ 8,171 $ 7,650 Earnings per share: Basic $ 0.25 $ 0.27 $ 0.24 $ 0.20 Diluted 0.25 0.27 0.24 0.20 Average shares outstanding: Basic 33,263,289 33,264,697 33,870,240 37,711,200 Diluted 33,489,106 33,483,584 34,072,909 37,893,014

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Business Combinations	Note 29 – Business Combinations On October 29, 2018, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of Salin Bancshares, Inc. (“Salin”). Pursuant to the Merger Agreement, Salin will merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and Salin Bank and Trust Company, a wholly-owned subsidiary of Salin, will merge with an into Horizon Bank, with Horizon Bank as the surviving bank. The boards of directors of each of Horizon and Salin have approved the Merger and the Merger Agreement. Subject to the approval of the Merger by Salin shareholders, regulatory approvals and other closing conditions, the parties anticipate completing the Merger during the first quarter of 2019. In connection with the Merger, shareholders of Salin will receive fixed consideration of 23,907.5 shares of Horizon common stock and $84,417.17 in cash for each share of Salin common stock. Based on the closing price of Horizon’s common stock on October 26, 2018 of $16.95 per share, the transaction value for the shares of common stock is approximately $135.3 million. The Merger Agreement also provides for certain termination rights for both Horizon and Salin, and further provides that upon termination of the Merger Agreement under certain circumstances, Salin will be obligated to pay Horizon a termination fee. As of December 31, 2018, Salin had total assets of approximately $929.4 million and total deposits of approximately $749.5 million and total loans of approximately $593.7 million.

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business — The consolidated financial statements of Horizon Bancorp, Inc. (“Horizon”) and its wholly owned subsidiaries, Horizon Bank (“Bank”) and Horizon Risk Management, Inc., together referred to as “Horizon” conform to accounting principles generally accepted in the United States of America and reporting practices followed by the banking industry. Horizon Risk Management, Inc. is a captive insurance company incorporated in Nevada and was formed as a wholly owned subsidiary of Horizon. 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 62 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”); Heartland Bancshares, Inc. in 2013, which formed Heartland (IN) Statutory Trust II (“Heartland Trust”); and LaPorte Bancorp, Inc. in 2016, which acquired City Savings Statutory Trust I (“City Savings Trust”) in 2007. 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 — The consolidated financial statements include the accounts of Horizon and subsidiaries. All material inter-company accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those 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 — Horizon uses fair value measurements to record fair value adjustments, to certain assets, and liabilities and to determine fair value disclosures. Horizon has adopted Accounting Standards Codification (ASC) 820, Fair Value Measurements and Disclosures for all applicable financial and nonfinancial assets and liabilities. This accounting guidance defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. This guidance applies only when other guidance requires or permits assets or liabilities to be measured at fair value; it does not expand the use of fair value in any new circumstances. 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 — Horizon designates the majority of its investment portfolio as available for sale based on management’s plans to use such securities for asset and liability management, liquidity and not to hold such securities as long-term investments. Management repositions the portfolio to take advantage of future expected interest rate trends when Horizon’s long-term profitability can be enhanced. Investment securities available for sale and marketable equity securities are carried at estimated fair value and any net unrealized gains/losses (after tax) on these securities are included in accumulated other comprehensive income. Amortization of premiums and accretion of discounts are recorded as interest income from securities. Gains/losses on the disposition of securities available for sale are recognized at the time of the transaction and are determined by the specific identification method.
Investment Securities Held to Maturity	Investment Securities Held to Maturity — Includes any security for which Horizon has the positive intent and ability to hold until maturity. These securities are carried at amortized cost.
Loans Held for Sale	Loans Held for Sale — Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to noninterest income. Gains and losses on loan sales are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan.
Interest and Fees on Loans	Interest and Fees on Loans — Interest on commercial, mortgage and installment loans is recognized over the term of the loans based on the principal amount outstanding. When 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. Loan origination fees, net of direct loan origination costs, are deferred and recognized over the life of the loan as a yield adjustment. Discounts and premiums on purchased loans are amortized to income using the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments.
Concentrations of Credit Risk	Concentrations of Credit Risk — The Bank grants commercial, real estate, and consumer loans to customers located primarily in the Northern and Central regions of Indiana and the Southern, Central and Great Lakes Bay regions of Michigan and provides mortgage warehouse lines to mortgage companies in the United States. Commercial loans make up approximately 57% of the loan portfolio and are secured by both real estate and business assets. These loans are expected to be repaid from cash flows from operations of the businesses. The Bank does not have a concentration in speculative commercial real estate loans. Residential real estate loans make up approximately 22% of the loan portfolio and are secured by residential real estate. Installment loans make up approximately 18% of the loan portfolio and are primarily secured by consumer assets. Mortgage warehouse loans make up approximately 3% of the loan portfolio and are secured by residential real estate.
Mortgage Warehouse Loans	Mortgage Warehouse Loans — Horizon’s mortgage warehousing has specific mortgage companies as customers of the Bank. Individual mortgage loans originated by these mortgage companies are funded as a secured borrowing with pledge of collateral under Horizon’s agreement with the mortgage company. Each individual mortgage 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. 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 — An allowance for loan losses is maintained to absorb probable incurred losses inherent in the loan portfolio. The allowance is based on ongoing quarterly assessments of the probable incurred losses inherent in the loan portfolio. The allowance is increased by the provision for credit losses, which is charged against current period operating results and decreased by the amount of charge offs, net of recoveries. Horizon’s methodology for assessing the appropriateness of the allowance consists of several key elements, which include the general allowance, specific allowances for identified problem loans and the qualitative allowance. 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 — When analysis determines a borrower’s operating results and financial condition are not adequate to meet 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 placed on non-accrual status when 90 days or more past due. These loans are also often considered impaired. Impaired loans or portions thereof, are charged-off when deemed uncollectible. This typically occurs when the loan is 90 or more days past due. 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. Performing loans acquired (FASB ASC 310-20) with credit impairment subsequent to the acquisition date are evaluated individually and charged down to the fair value of the underlying collateral in the period the uncollectible loss is reasonably determined.
Premises and Equipment	Premises and Equipment — Buildings and major improvements are capitalized and depreciated using primarily the straight-line method with useful lives ranging from 3 to 40 years. Furniture and equipment are capitalized and depreciated using primarily the straight-line method with useful lives ranging from 2 to 20 years. Maintenance and repairs are expensed as incurred while major additions and improvements are capitalized. Gains and losses on disposition are included in current operations.
Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock	Federal Reserve and Federal Home Loan Bank of Indianapolis (FHLBI) Stock — The stock is a required investment for institutions that are members of the Federal Reserve Bank (“FRB”) and Federal Home Loan Bank (“FHLB”) systems. The required investment in the common stock is based on a predetermined formula.
Mortgage Servicing Rights	Mortgage Servicing Rights —Mortgage servicing assets are recognized separately when rights are acquired through purchase or through sale of financial assets. Under the servicing assets and liabilities accounting guidance (ASC 860-50), servicing rights resulting from the sale or securitization of loans originated by the Company are initially measured at fair value at the date of transfer. Amortized mortgage servicing rights include commercial mortgage servicing rights. Under the amortization method, servicing rights are amortized in proportion to and over the period of estimated net servicing income. The amortized assets are assessed for impairment or increased obligation based on fair value at each reporting date. 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 — Goodwill is tested annually for impairment. At December 31, 2018, Horizon had core deposit intangibles of $10.4 million subject to amortization and $119.9 million of goodwill, which is not subject to amortization. Goodwill arising from business combinations represents the value attributable to unidentifiable intangible assets in the business acquired. Horizon’s goodwill relates to the value inherent in the banking industry and that value is dependent upon the ability of Horizon to provide quality, cost effective banking services in a competitive marketplace. The goodwill value is supported by revenue that is in part driven by the volume of business transacted. If the implied fair value of goodwill is lower than its carrying amount, goodwill impairment is indicated and goodwill is written down to its implied fair value. A large majority of the goodwill relates to the acquisitions of Heartland, Summit, Peoples, Kosciusko, LaPorte, Lafayette and Wolverine.
Bank Owned Life Insurance (BOLI)	Bank Owned Life Insurance (BOLI) – BOLI has been purchased on certain employees and directors of the Company. The Company records the life insurance at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due that are probable at settlement.
Income Taxes	Income Taxes —The Company accounts for income taxes in accordance with income tax accounting guidance (ASC 740, Income Taxes ). The income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. 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 — Property, other than cash deposits, held in a fiduciary or agency capacity is not included in the consolidated balance sheets since such property is not owned by Horizon.
Transfer of Financial Assets	Transfer of Financial Assets — The transfer of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company and put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.
Earnings per Common Share	Earnings per Common Share — Basic earnings per share is computed by dividing net income available to common shareholders (net income less dividend requirements for preferred stock and accretion of preferred stock discount) by the weighted-average number of common shares outstanding. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. The following table shows computation of basic and diluted earnings per share. Years Ended December 31 2018 2017 2016 Basic earnings per share Net income $ 53,117 $ 33,117 $ 23,912 Less: Preferred stock dividends — — 42 Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Basic earnings per share $ 1.39 $ 0.96 $ 0.80 Diluted earnings per share Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Effect of dilutive securities: Restricted stock 36,185 46,981 39,829 Stock options 111,987 159,721 102,193 Weighted average common shares outstanding 38,495,231 34,760,438 30,123,614 $ 1.38 $ 0.95 $ 0.79 (1) Adjusted for 3:2 stock split on June 15, 2018 At December 31, 2018, there were 102,138 shares and at December 31, 2017 and 2016 there were zero shares that were not included in the computation of diluted earnings per share because they were non-dilutive. On May 15, 2018, the Board of Directors of the Company approved a three-for-two stock split of the Company’s authorized common stock, no par value. All share and per share amounts in the consolidated financial statements and notes thereto have been retroactively adjusted, where necessary, to reflect this three-for-two stock split. The effect of the three-for-two stock split on the outstanding common shares is that shareholders of record as of the close of business on May 31, 2018, the record date, received an additional half share for each share of common stock held, with shareholders receiving cash in lieu of any fractional shares. The additional shares issued in the stock split were payable and issued on June 15, 2018, and the common shares began trading on a split-adjusted basis on June 19, 2018.
Dividend Restrictions	Dividend Restrictions — Horizon’s principal source of funds for dividend payments is dividends received from the Bank. Banking regulations limit the amount of dividends that may be paid without prior approval of regulatory agencies. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s net profits combined with the retained net profits of the preceding two years, subject to the capital requirements described in Note 21. At December 31, 2018, the Bank could, without prior approval, declare dividends of approximately $26.0 million to Horizon. Additionally, the Federal Reserve Board limits the amount of dividends that may be paid by Horizon to its stockholders under its capital adequacy guidelines.
Consolidated Statements of Cash Flows	Consolidated Statements of Cash Flows — For purposes of reporting cash flows, cash and cash equivalents are defined to include cash and due from banks, money market investments and federal funds sold with maturities of one day or less. Horizon reports net cash flows for customer loan transactions, deposit transactions, short-term investments and borrowings.
Comprehensive Income	Comprehensive Income — Comprehensive income consists of net income and other comprehensive income (loss), net of applicable income taxes. Other comprehensive income (loss) includes unrealized appreciation (depreciation) on available-for-sale securities, unrealized and realized gains and losses in derivative financial instruments and amortization of available-for-sale securities transferred to held-to-maturity.
Share-Based Compensation	Share-Based Compensation
Derivatives	Derivative Financial Instruments — The Company occasionally enters into derivative financial instruments as part of its interest rate risk management strategies. These derivative financial instruments consist primarily of interest rate swaps. All derivative instruments are recorded on the Statements of Financial Condition, as either an asset or liability, at their fair value. The accounting for the gain or loss resulting from the change in fair value depends on the intended use of the derivative. For a derivative used to hedge changes in fair value of a recognized asset or liability, or an unrecognized firm commitment, the gain or loss on the derivative will be recognized in earnings together with the offsetting loss or gain on the hedged item. This results in an earnings impact only to the extent that the hedge is ineffective in achieving offsetting changes in fair value. If it is determined that the derivative instrument is not highly effective as a hedge, hedge accounting is discontinued and the adjustment to fair value of the derivative instrument is recorded in earnings. For a derivative used to hedge changes in cash flows associated with forecasted transactions, the gain or loss of the effective portion of the derivative will be deferred, and reported as accumulated other comprehensive income, a component of shareholders’ equity, until such time the hedged transaction affects earnings. For derivative instruments not accounted for as hedges, changes in fair value are recognized in non-interest income or non-interest expense. Deferred gains and losses from derivatives that are terminated and were in a cash flow hedge are amortized over the shorter of the original remaining term of the derivative or the remaining life of the underlying asset or liability.
Reclassifications	Reclassifications
Recent Accounting Pronouncements	Recent Accounting Pronouncements Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement The FASB has issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Instrument FASB ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities The FASB has issued ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities FASB ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income The FASB has issued ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income stranded tax effects included in FASB ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities The FASB has issued ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities 6.3 46 FASB ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment The FASB has issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment FASB ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments The FASB has issued ASU No. 2016-13, Financial Instrument – Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. FASB ASU No. 2016-02, Leases (Topic 842) The FASB has issued ASU No. 2016-02, Leases (Topic 842). In July 2018, the FASB issued amendments (ASU No. 2018-11) which provide entities with additional (and optional) transition method to adopt the new lease standard. Under this new transition method, an entity initially applies the new lease standard at the adoption date and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Consequently, an entity’s reporting for the comparative periods presented in the financial statements in which it adopts the new leases standard will continue to be in accordance with current GAAP (Topic 842, Leases). The amendments in ASU 2018-11 also provide lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead, to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue guidance (Topic 606) and certain criteria are met. For entities that have not adopted Topic 842 before the issuance of ASU No. 2018-11, the effective date and transition requirements for the amendments related to separating components of a contract are the same as the effective date and transition requirements in ASU No. 2016-02. In December 2018, the FASB issued amendments (ASU No. 2018-20) which addresses issues facing lessors when applying the leases standard. The amendments in ASU 2018-20 provide for certain accounting policy elections and changes lessor accounting for sales and similar taxes and certain lessor costs. Entities that have not yet adopted Topic 842 before the issuance of ASU 2018-20 should apply ASU 2018-20 to all new and existing leases when the entity first applies Topic 842 and should apply the same transition method elected for Topic 842. FASB ASU No. 2016-01, Financial Instruments – Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities The FASB has issued 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 did not have a significant effect on the Company’s consolidated financial statements. Revenue Recognition “Revenue from Contracts with Customers” • Service charges and fees on deposit accounts – these include general service fees charged for deposit account maintenance and activity and transaction-based fees charged for certain services, such as debit card, wire transfer and overdraft activities. Revenue is recognized when the performance obligation is completed, which is generally after a transaction is completed or monthly for account maintenance services. • Fiduciary activities – this includes periodic fees due from trust and wealth management customers for managing the customers’ financial assets. Fees are charged based on a standard agreement and are recognized as they are earned.

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
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 2018 2017 2016 Basic earnings per share Net income $ 53,117 $ 33,117 $ 23,912 Less: Preferred stock dividends — — 42 Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Basic earnings per share $ 1.39 $ 0.96 $ 0.80 Diluted earnings per share Net income available to common shareholders $ 53,117 $ 33,117 $ 23,870 Weighted average common shares outstanding (1) 38,347,059 34,553,736 29,981,592 Effect of dilutive securities: Restricted stock 36,185 46,981 39,829 Stock options 111,987 159,721 102,193 Weighted average common shares outstanding 38,495,231 34,760,438 30,123,614 $ 1.38 $ 0.95 $ 0.79 (1) Adjusted for 3:2 stock split on June 15, 2018

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Pro Forma Result of Comparable Prior Reporting Period	The following schedule includes pro-forma results for the periods ended December 31, 2017 and 2016 as if the Wolverine, Lafayette, CNB, LaPorte Bancorp and Kosciusko acquisitions had occurred as of the beginning of the comparable prior reporting periods. Years Ended December 31 2017 2016 Summary of Operations: Net Interest Income $ 125,442 $ 115,860 Provision for Loan Losses (12 ) 1,082 Net Interest Income after Provision for Loan Losses 125,454 114,778 Non-interest Income 33,959 43,330 Non-interest Expense 109,605 119,522 Income before Income Taxes 49,808 38,586 Income Tax Expense 16,204 12,072 Net Income 33,604 26,514 Net Income Available to Common Shareholders $ 33,604 $ 26,472 Basic Earnings per Share $ 0.97 $ 0.88 Diluted Earnings per Share $ 0.97 $ 0.88
Wolverine Bancorp Inc [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on preliminary valuations 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 Wolverine acquisition is allocated as follows: Assets Cash and due from banks $ 44,450 Loans Commercial 276,167 Residential mortgage 30,603 Consumer 3,897 Total loans 310,667 Premises and equipment, net 2,941 FRB and FHLB stock 2,700 Goodwill 26,827 Core deposit intangible 2,024 Interest receivable 584 Other assets 3,897 Total assets purchased $ 394,090 Common shares issued $ 62,111 Cash paid 31,662 Total purchase price $ 93,773 Liabilities Deposits Non-interest bearing $ 25,221 NOW accounts 8,026 Savings and money market 129,044 Certificates of deposit 94,688 Total deposits 256,979 Borrowings 36,970 Interest payable 214 Other liabilities 6,154 Total liabilities assumed $ 300,317
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 October 17, 2017. Contractually required principal and interest at acquisition $ 21,912 Contractual cash flows not expected to be collected (nonaccretable differences) 1,832 Expected cash flows at acquisition 20,080 Interest component of expected cash flows (accretable discount) 2,267 Fair value of acquired loans accounted for under ASC 310-30 $ 17,813
Central National Bank & Trust [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 CNB acquisition is allocated as follows: Assets Cash and due from banks $ 27,860 Investment securities, available for sale 16,393 Loans Commercial 2,267 Residential mortgage 6,624 Consumer 1,579 Total loans 10,470 Premises and equipment, net 444 FHLB stock 50 Goodwill 609 Core deposit intangible 190 Interest receivable 154 Other assets 49 Total assets purchased $ 56,219 Cash paid $ 5,311 Total purchase price $ 5,311 Liabilities Deposits Non-interest bearing $ 24,079 NOW accounts 9,038 Savings and money market 13,829 Certificates of deposit 3,342 Total deposits 50,288 Borrowings 459 Interest payable 7 Other liabilities 154 Total liabilities assumed $ 50,908
LaPorte Bancorp Inc [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the LaPorte Bancorp acquisition is detailed in the following table. Assets Cash and due from banks $ 154,849 Investment securities, available for sale 23,779 Loans Commercial 153,750 Residential mortgage 42,603 Consumer 16,801 Mortgage warehousing 99,752 Total loans 312,906 Premises and equipment, net 6,022 FHLB stock 4,029 Goodwill 20,993 Core deposit intangible 2,514 Interest receivable 844 Cash value of life insurance 15,267 Other assets 8,334 Total assets purchased $ 549,537 Common shares issued $ 60,306 Cash paid 38,328 Total purchase price $ 98,634 Liabilities Deposits Non-interest bearing $ 66,733 NOW accounts 99,346 Savings and money market 117,688 Certificates of deposit 87,605 Total deposits 371,372 Borrowings 64,793 Subordinated debentures 4,504 Interest payable 178 Other liabilities 10,056 Total liabilities assumed $ 450,903
Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30	The following table details the acquired loans th at are accounted for in accordance with ASC 310-30 as of July 18, 2016. Contractually required principal and interest at acquisition $ 12,545 Contractual cash flows not expected to be collected ( nonaccretable differences) 4,492 Expected cash flows at acquisition 8,053 Interest component of expected cash flows ( accretable discount) 1,258 Fair value of acquired loans accounted for under ASC 310-30 $ 6,795
Kosciusko Financial Inc [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Kosciusko acquisition is detailed in the following table. Assets Cash and due from banks $ 38,950 Investment securities, available for sale 1,191 Loans Commercial 70,006 Residential mortgage 26,244 Consumer 6,319 Total loans 102,569 Premises and equipment, net 1,466 FRB and FHLB stock 582 Goodwill 6,443 Core deposit intangible 526 Interest receivable 636 Cash value of life insurance 2,745 Other assets 765 Total assets purchased $ 155,873 Common shares issued $ 14,470 Cash paid 8,513 Total purchase price $ 22,983 Liabilities Deposits Non-interest bearing $ 27,871 NOW accounts 35,213 Savings and money market 26,953 Certificates of deposit 32,771 Total deposits 122,808 Borrowings 9,038 Interest payable 55 Other liabilities 989 Total liabilities assumed $ 132,890
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 June 1, 2016. Contractually required principal and interest at acquisition $ 2,682 Contractual cash flows not expected to be collected ( nonaccretable differences) 25 Expected cash flows at acquisition 2,657 Interest component of expected cash flows ( accretable discount) 634 Fair value of acquired loans accounted for under ASC 310-30 $ 2,023
Lafayette Community Bancorp [Member]
Schedule of Purchase Price of Assets Acquired and Liabilities Assumed	Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Lafayette acquisition is detailed in the following table. Assets Cash and due from banks $ 24,846 Investment securities, available for sale 6 Loans Commercial 116,258 Residential mortgage 12,761 Consumer 5,280 Total loans 134,299 Premises and equipment, net 7,818 FHLB stock 395 Goodwill 15,408 Core deposit intangible 2,085 Interest receivable 338 Other assets 1,649 Total assets purchased $ 186,844 Common shares issued $ 30,044 (1) Cash paid 4,421 Total purchase price $ 34,465 Liabilities Deposits Non-interest bearing $ 34,990 NOW accounts 30,174 Savings and money market 53,663 Certificates of deposit 32,520 Total deposits 151,347 Interest payable 42 Other liabilities 990 Total liabilities assumed $ 152,379 (1) This includes $ 955,000
Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30	Contractually required principal and interest at acquisition $ 6,128 Contractual cash flows not expected to be collected (nonaccretable differences) 1,326 Expected cash flows at acquisition 4,802 Interest component of expected cash flows (accretable discount) 933 Fair value of acquired loans accounted for under ASC 310-30 $ 3,869

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Fair Value of Securities	The fair value of securities is as follows: December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale U.S. Treasury and federal agencies $ 16,815 $ 1 $ (208 ) $ 16,608 State and municipal 210,386 1,495 (2,578 ) 209,303 Federal agency collateralized mortgage obligations 187,563 625 (3,185 ) 185,003 Federal agency mortgage-backed pools 183,479 80 (4,823 ) 178,736 Corporate notes 10,666 107 (75 ) 10,698 Total available for sale investment securities $ 608,909 $ 2,308 $ (10,869 ) $ 600,348 Held to maturity State and municipal $ 191,269 $ 1,773 $ (3,366 ) $ 189,676 Federal agency collateralized mortgage obligations 5,144 6 (120 ) 5,030 Federal agency mortgage-backed pools 13,699 74 (206 ) 13,567 Total held to maturity investment securities $ 210,112 $ 1,853 $ (3,692 ) $ 208,273 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale U.S. Treasury and federal agencies $ 19,277 $ — $ (225 ) $ 19,052 State and municipal 148,045 2,189 (670 ) 149,564 Federal agency collateralized mortgage obligations 132,871 45 (2,551 ) 130,365 Federal agency mortgage-backed pools 211,487 155 (2,985 ) 208,657 Private labeled mortgage-backed pools 1,650 — (8 ) 1,642 Corporate notes 272 113 — 385 Total available for sale investment securities $ 513,602 $ 2,502 $ (6,439 ) $ 509,665 Held to maturity State and municipal $ 179,836 $ 3,493 $ (2,932 ) $ 180,397 Federal agency collateralized mortgage obligations 5,734 17 (69 ) 5,682 Federal agency mortgage-backed pools 14,878 216 (88 ) 15,006 Total held to maturity investment securities $ 200,448 $ 3,726 $ (3,089 ) $ 201,085
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, 2018 and December 31, 2017, 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, 2018 December 31, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Available for sale Within one year $ 20,532 $ 20,448 $ 13,347 $ 13,326 One to five years 42,476 41,705 40,468 40,193 Five to ten years 107,839 107,107 50,473 51,156 After ten years 67,020 67,349 63,306 64,326 237,867 236,609 167,594 169,001 Federal agency collateralized mortgage obligations 187,563 185,003 132,871 130,365 Federal agency mortgage-backed pools 183,479 178,736 211,487 208,657 Private labeled mortgage-backed pools — — 1,650 1,642 Total available for sale investment securities $ 608,909 $ 600,348 $ 513,602 $ 509,665 Held to maturity Within one year $ 70 $ 70 $ 1,948 $ 1,934 One to five years 48,732 49,324 40,603 41,531 Five to ten years 101,809 101,533 89,801 91,249 After ten years 40,658 38,749 47,484 45,683 191,269 189,676 179,836 180,397 Federal agency collateralized mortgage obligations 5,144 5,030 5,734 5,682 Federal agency mortgage-backed pools 13,699 13,567 14,878 15,006 Total held to maturity investment securities $ 210,112 $ 208,273 $ 200,448 $ 201,085
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. December 31, 2018 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Investment Securities U.S. Treasury and federal agencies $ — $ — $ 9,707 $ (208 ) $ 9,707 $ (208 ) State and municipal 75,163 (1,628 ) 106,335 (4,316 ) 181,498 (5,944 ) Federal agency collateralized mortgage obligations 6,450 (25 ) 106,257 (3,280 ) 112,707 (3,305 ) Federal agency mortgage-backed pools 5,739 (39 ) 175,865 (4,990 ) 181,604 (5,029 ) Corporate notes 5,263 (75 ) — — 5,263 (75 ) Total temporarily impaired securities $ 92,615 $ (1,767 ) $ 398,164 $ (12,794 ) $ 490,779 $ (14,561 ) December 31, 2017 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Investment Securities U.S. Treasury and federal agencies $ 15,882 $ (180 ) $ 2,870 $ (45 ) $ 18,752 $ (225 ) State and municipal 54,312 (2,758 ) 30,691 (844 ) 85,003 (3,602 ) Federal agency collateralized mortgage obligations 54,006 (589 ) 73,462 (2,031 ) 127,468 (2,620 ) Federal agency mortgage-backed pools 103,926 (1,019 ) 86,846 (2,054 ) 190,772 (3,073 ) Private labeled mortgage-backed pools 1,642 (8 ) — — 1,642 (8 ) Total temporarily impaired securities $ 229,768 $ (4,554 ) $ 193,869 $ (4,974 ) $ 423,637 $ (9,528 )
Sales of Securities Available for Sale	Information regarding security proceeds, gross gains and gross losses are presented below. Years Ended December 31 2018 2017 2016 Sales of securities available for sale Proceeds $ 38,519 $ 5,490 $ 182,549 Gross gains 37 151 2,646 Gross losses (480 ) (113 ) (810 )

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Amounts of Loans	December 31 2018 December 31 2017 Commercial Working capital and equipment $ 804,083 $ 720,477 Real estate, including agriculture 834,037 880,861 Tax exempt 48,975 36,324 Other 34,495 32,272 Total 1,721,590 1,669,934 Real estate 1-4 family 659,754 602,196 Other 8,387 7,543 Total 668,141 609,739 Consumer Auto 327,413 244,003 Recreation 13,975 8,728 Real estate/home improvement 39,587 37,052 Home equity 163,209 165,240 Unsecured 4,043 3,479 Other 1,254 2,497 Total 549,481 460,999 Mortgage warehouse 74,120 94,508 Total loans 3,013,332 2,835,180 Allowance for loan losses (17,820 ) (16,394 ) Loans, net $ 2,995,512 $ 2,818,786
Recorded Investment of Individual Loan Categories	The following table shows the recorded investment of individual loan categories. December 31, 2018 Loan Balance Interest Due Deferred Costs/ (Fees) Recorded Investment Owner occupied real estate $ 561,463 $ 1,240 $ (1,629 ) $ 561,074 Non-owner occupied real estate 717,814 1,063 (1,839 ) 717,038 Residential spec homes 5,199 13 (2 ) 5,210 Development & spec land 46,547 131 (12 ) 46,666 Commercial and industrial 394,346 3,149 (297 ) 397,198 Total commercial 1,725,369 5,596 (3,779 ) 1,727,186 Residential mortgage 646,136 1,861 (2,025 ) 645,972 Residential construction 24,030 42 — 24,072 Mortgage warehouse 74,120 480 — 74,600 Total real estate 744,286 2,383 (2,025 ) 744,644 Direct installment 38,173 103 566 38,842 Indirect installment 314,177 738 — 314,915 Home equity 194,766 973 1,799 197,538 Total consumer 547,116 1,814 2,365 551,295 Total loans 3,016,771 9,793 (3,439 ) 3,023,125 Allowance for loan losses (17,820 ) — — (17,820 ) Net loans $ 2,998,951 $ 9,793 $ (3,439 ) $ 3,005,305 December 31, 2017 Loan Balance Interest Due Deferred Costs/ (Fees) Recorded Investment Owner occupied real estate $ 576,022 $ 1,511 $ (1,917 ) $ 575,616 Non-owner occupied real estate 683,901 1,138 (2,478 ) 682,561 Residential spec homes 16,591 63 (80 ) 16,574 Development & spec land 49,996 117 (579 ) 49,534 Commercial and industrial 349,085 2,572 (607 ) 351,050 Total commercial 1,675,595 5,401 (5,661 ) 1,675,335 Residential mortgage 596,087 1,776 (2,375 ) 595,488 Residential construction 16,027 39 — 16,066 Mortgage warehouse 94,508 480 — 94,988 Total real estate 706,622 2,295 (2,375 ) 706,542 Direct installment 36,737 113 552 37,402 Indirect installment 227,659 528 (168 ) 228,019 Home equity 194,860 889 1,359 197,108 Total consumer 459,256 1,530 1,743 462,529 Total loans 2,841,473 9,226 (6,293 ) 2,844,406 Allowance for loan losses (16,394 ) — — (16,394 ) Net loans $ 2,825,079 $ 9,226 $ (6,293 ) $ 2,828,012

Accounting for Certain Loans _2

Accounting for Certain Loans Acquired in a Transfer (Tables)	12 Months Ended
	Dec. 31, 2018
Carrying Amounts of Loans	The carrying amounts of those loans included in the balance sheet amounts of loans receivable are as follows: December 31, 2018 Commercial Real Estate Consumer Outstanding Balance Allowance for Loan Losses Carrying Amount Heartland $ 232 $ 175 $ — $ 407 $ — $ 407 Summit 323 555 — 878 — 878 Peoples 270 58 — 328 — 328 Kosciusko 746 155 — 901 — 901 LaPorte 753 947 27 1,727 60 1,667 Lafayette 3,080 — — 3,080 — 3,080 Wolverine 7,841 — — 7,841 — 7,841 Total $ 13,245 $ 1,890 $ 27 $ 15,162 $ 60 $ 15,102 December 31, 2017 Commercial Real Estate Consumer Outstanding Balance Allowance for Loan Losses Carrying Amount Heartland $ 390 $ 229 $ — $ 619 $ — $ 619 Summit 3,653 870 — 4,523 — 4,523 Peoples 315 126 — 441 — 441 Kosciusko 838 403 — 1,241 — 1,241 LaPorte 1,034 1,004 33 2,071 — 2,071 Lafayette 4,271 — — 4,271 — 4,271 Wolverine 16,697 — — 16,697 — 16,697 Total $ 27,198 $ 2,632 $ 33 $ 29,863 $ — $ 29,863
Accretable Yield or Income Expected to be Collected	Accretable yield, or income expected to be collected are as follows: Twelve Months Ended December 31, 2018 Beginning balance Additions Accretion Reclassification from nonaccretable difference Disposals Ending balance Heartland $ 452 $ — $ (85 ) $ — $ (193 ) $ 174 Summit 147 — (54 ) — (51 ) 42 Kosciusko 386 — (78 ) — (8 ) 300 LaPorte 980 — (144 ) — (7 ) 829 Lafayette 933 — (275 ) — (49 ) 609 Wolverine 2,267 — (812 ) — (757 ) 698 Total $ 5,165 $ — $ (1,448 ) $ — $ (1,065 ) $ 2,652 Twelve Months Ended December 31, 2017 Beginning balance Additions Accretion Reclassification from nonaccretable difference Disposals Ending balance Heartland $ 557 $ — $ (99 ) $ — $ (6 ) $ 452 Summit 502 — (353 ) — (2 ) 147 Peoples 389 — (388 ) — (1 ) — Kosciusko 530 — (101 ) — (43 ) 386 LaPorte 1,479 — (235 ) — (264 ) 980 Lafayette — 933 — — — 933 Wolverine — 2,267 — — — 2,267 Total $ 3,457 $ 3,200 $ (1,176 ) $ — $ (316 ) $ 5,165

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2018
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 using the highest of the one, two or five-year historical loss experience is an appropriate methodology 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. Years Ended December 31 2018 2017 2016 Balance at beginning of the period $ 16,394 $ 14,837 $ 14,534 Loans charged-off: Commercial Owner occupied real estate 112 68 181 Non-owner occupied real estate — 20 471 Residential spec homes — — — Development & spec land — 1 — Commercial and industrial 361 540 106 Total commercial 473 629 758 Real estate Residential mortgage 76 89 213 Residential construction — — — Mortgage warehouse — — — Total real estate 76 89 213 Consumer Direct installment 154 137 329 Indirect installment 1,673 1,193 1,051 Home equity 176 205 309 Total consumer 2,003 1,535 1,689 Total loans charged-off 2,552 2,253 2,660 Recoveries of loans previously charged-off: Commercial Owner occupied real estate 59 9 31 Non-owner occupied real estate 29 32 55 Residential spec homes 8 8 8 Development & spec land — — — Commercial and industrial 80 249 116 Total commercial 176 298 210 Real estate Residential mortgage 27 44 97 Residential construction — — — Mortgage warehouse — — — Total real estate 27 44 97 Consumer Direct installment 53 501 81 Indirect installment 505 497 529 Home equity 311 — 204 Total consumer 869 998 814 Total loan recoveries 1,072 1,340 1,121 Net loans charged-off 1,480 913 1,539 Provision charged to operating expense Commercial 1,699 2,164 (68 ) Real estate (487 ) (81 ) (23 ) Consumer 1,694 387 1,933 Total provision charged to operating expense 2,906 2,470 1,842 Balance at the end of the period $ 17,820 $ 16,394 $ 14,837
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, 2018 Commercial Real Estate Mortgage Warehousing Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,035 $ — $ — $ — $ 1,035 Collectively evaluated for impairment 9,460 1,676 1,006 4,643 16,785 Loans acquired with deteriorated credit quality — — — — — Total ending allowance balance $ 10,495 $ 1,676 $ 1,006 $ 4,643 $ 17,820 Loans: Individually evaluated for impairment $ 6,708 $ — $ — $ — $ 6,708 Collectively evaluated for impairment 1,718,661 670,166 74,120 547,116 3,010,063 Loans acquired with deteriorated credit quality — — — — — Total ending loans balance $ 1,725,369 $ 670,166 $ 74,120 $ 547,116 $ 3,016,771 December 31, 2017 Commercial Real Estate Mortgage Warehousing Consumer Total Allowance For Loan Losses Ending allowance balance attributable to loans: Individually evaluated for impairment $ 184 $ — $ — $ — $ 184 Collectively evaluated for impairment 8,909 2,188 1,030 4,083 16,210 Loans acquired with deteriorated credit quality — — — — — Total ending allowance balance $ 9,093 $ 2,188 $ 1,030 $ 4,083 $ 16,394 Loans: Individually evaluated for impairment $ 7,187 $ — $ — $ — $ 7,187 Collectively evaluated for impairment 1,668,408 612,114 94,508 459,256 2,834,286 Loans acquired with deteriorated credit quality — — — — — Total ending loans balance $ 1,675,595 $ 612,114 $ 94,508 $ 459,256 $ 2,841,473

Non-performing Assets and Imp_2

Non-performing Assets and Impaired Loans (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 Non-accrual Loans Past Due Over 90 Days Still Accruing Non-peforming TDRs Performing TDRs Total Non-performing Loans Commercial Owner occupied real estate $ 3,413 $ — $ — $ 109 $ 3,522 Non-owner occupied real estate 554 — 492 — 1,046 Residential spec homes — — — — — Development & spec land 68 — — — 68 Commercial and industrial 2,059 208 — — 2,267 Total commercial 6,094 208 492 109 6,903 Real estate Residential mortgage 2,846 180 423 1,558 5,007 Residential construction — — — — — Mortgage warehouse — — — — — Total real estate 2,846 180 423 1,558 5,007 Consumer Direct installment 35 — — — 35 Indirect installment 916 173 — — 1,089 Home equity 1,657 7 142 335 2,141 Total consumer 2,608 180 142 335 3,265 Total $ 11,548 $ 568 $ 1,057 $ 2,002 $ 15,175 December 31, 2017 Non-accrual Loans Past Due Over 90 Days Still Accruing Non-peforming TDRs Performing TDRs Total Non-performing Loans Commercial Owner occupied real estate $ 4,877 $ — $ 11 $ 1 $ 4,889 Non-owner occupied real estate 115 — 440 — 555 Residential spec homes — — — — — Development & spec land 176 — — — 176 Commercial and industrial 1,734 — — — 1,734 Total commercial 6,902 — 451 1 7,354 Real estate Residential mortgage 3,693 — 351 1,450 5,494 Residential construction — — — 222 222 Mortgage warehouse — — — — — Total real estate 3,693 — 351 1,672 5,716 Consumer Direct installment 160 — — — 160 Direct installment purchased — — — — — Indirect installment 1,041 167 — — 1,208 Home equity 1,480 — 211 285 1,976 Total consumer 2,681 167 211 285 3,344 Total $ 13,276 $ 167 $ 1,013 $ 1,958 $ 16,414
Commercial Loans Individually Evaluated for Impairment by Class of Loans	The following table presents commercial loans individually evaluated for impairment by class of loans: December 31, 2018 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 2,696 $ 2,689 $ — $ 3,048 $ 71 Non-owner occupied real estate 860 888 — 1,096 12 Residential spec homes — — — — — Development & spec land 68 66 — 71 — Commercial and industrial 1,344 1,337 — 1,239 27 Total commercial 4,968 4,980 — 5,454 110 With an allowance recorded Commercial Owner occupied real estate 827 828 145 864 — Non-owner occupied real estate 186 186 30 180 4 Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial 715 714 860 870 14 Total commercial 1,728 1,728 1,035 1,914 18 Total $ 6,696 $ 6,708 $ 1,035 $ 7,368 $ 128 December 31, 2017 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 3,824 $ 3,849 $ — $ 1,673 $ 11 Non-owner occupied real estate 554 570 — 345 — Residential spec homes — — — — — Development & spec land 176 174 — 233 4 Commercial and industrial 1,656 1,663 — 1,445 25 Total commercial 6,210 6,256 — 3,696 40 With an allowance recorded Commercial Owner occupied real estate 931 931 184 78 46 Non-owner occupied real estate — — — — — Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial — — — — — Total commercial 931 931 184 78 46 Total $ 7,141 $ 7,187 $ 184 $ 3,774 $ 86 December 31, 2016 Twelve Months Ended Unpaid Principal Balance Recorded Investment Allowance for Loan Loss Allocated Average Balance in Impaired Loans Cash/Accrual Interest Income Recognized With no recorded allowance Commercial Owner occupied real estate $ 1,533 $ 1,533 $ — $ 1,619 $ 58 Non-owner occupied real estate 440 440 — 871 18 Residential spec homes — — — — — Development & spec land 118 118 — 61 16 Commercial and industrial 128 127 — 349 1 Total commercial 2,219 2,218 — 2,900 93 With an allowance recorded Commercial Owner occupied real estate — — — — — Non-owner occupied real estate — — — — — Residential spec homes — — — — — Development & spec land — — — — — Commercial and industrial 31 32 4 5 2 Total commercial 31 32 4 5 2 Total $ 2,250 $ 2,250 $ 4 $ 2,905 $ 95
Payment Status by Class of Loan	The following table presents the payment status by class of loans: December 31, 2018 Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Total Past Due & Non-accrual Loans Total Commercial Owner occupied real estate $ 556,516 $ 537 $ 997 $ — $ 3,413 $ 4,947 $ 561,463 Non-owner occupied real estate 716,574 175 19 — 1,046 1,240 717,814 Residential spec homes 4,707 492 — — — 492 5,199 Development & spec land 46,479 — — — 68 68 46,547 Commercial and industrial 390,828 515 736 208 2,059 3,518 394,346 Total commercial 1,715,104 1,719 1,752 208 6,586 10,265 1,725,369 Real estate Residential mortgage 641,500 1,131 56 180 3,269 4,636 646,136 Residential construction 24,030 — — — — — 24,030 Mortgage warehouse 74,120 — — — — — 74,120 Total real estate 739,650 1,131 56 180 3,269 4,636 744,286 Consumer Direct installment 38,138 93 18 — 35 35 38,173 Indirect installment 313,088 1,396 198 173 916 1,089 314,177 Home equity 192,960 761 37 7 1,799 1,806 194,766 Total consumer 544,186 2,250 253 180 2,750 2,930 547,116 Total $ 2,998,940 $ 5,100 $ 2,061 $ 568 $ 12,605 $ 17,831 $ 3,016,771 Percentage of total loans 99.41 % 0.17 % 0.07 % 0.02 % 0.42 % 0.59 % December 31, 2017 Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Total Past Due & Non-accrual Loans Total Commercial Owner occupied real estate $ 567,571 $ 1,613 $ 1,950 $ — $ 4,888 $ 8,451 $ 576,022 Non-owner occupied real estate 682,712 512 122 — 555 1,189 683,901 Residential spec homes 16,591 — — — — — 16,591 Development & spec land 49,789 31 — — 176 207 49,996 Commercial and industrial 346,830 520 1 — 1,734 2,255 349,085 Total commercial 1,663,493 2,676 2,073 — 7,353 12,102 1,675,595 Real estate Residential mortgage 590,746 1,248 49 — 4,044 5,341 596,087 Residential construction 15,964 63 — — — 63 16,027 Mortgage warehouse 94,508 — — — — — 94,508 Total real estate 701,218 1,311 49 — 4,044 5,404 706,622 Consumer Direct installment 36,489 78 10 — 160 248 36,737 Indirect installment 224,348 1,859 244 167 1,041 3,311 227,659 Home equity 192,140 502 527 — 1,691 2,720 194,860 Total consumer 452,977 2,439 781 167 2,892 6,279 459,256 Total $ 2,817,688 $ 6,426 $ 2,903 $ 167 $ 14,289 $ 23,785 $ 2,841,473 Percentage of total loans 99.16 % 0.23 % 0.10 % 0.01 % 0.50 % 0.84 %
Loans by Credit Grades	The following table presents loans by credit grades. December 31, 2018 Pass Special Mention Substandard Doubtful Total Commercial Owner occupied real estate $ 538,177 $ 6,618 $ 16,668 $ — $ 561,463 Non-owner occupied real estate 702,269 9,682 5,863 — 717,814 Residential spec homes 5,199 — — — 5,199 Development & spec land 46,382 97 68 — 46,547 Commercial and industrial 379,607 6,655 8,084 — 394,346 Total commercial 1,671,634 23,052 30,683 — 1,725,369 Real estate Residential mortgage 641,309 — 4,827 — 646,136 Residential construction 24,030 — — — 24,030 Mortgage warehouse 74,120 — — — 74,120 Total real estate 739,459 — 4,827 — 744,286 Consumer Direct installment 38,138 — 35 — 38,173 Indirect installment 313,088 — 1,089 — 314,177 Home equity 192,625 — 2,141 — 194,766 Total consumer 543,851 — 3,265 — 547,116 Total $ 2,954,944 $ 23,052 $ 38,775 $ — $ 3,016,771 Percentage of total loans 97.95 % 0.76 % 1.29 % 0.00 % December 31, 2017 Pass Special Mention Substandard Doubtful Total Commercial Owner occupied real estate $ 549,198 $ 8,622 $ 18,202 $ — $ 576,022 Non-owner occupied real estate 675,030 3,864 5,007 — 683,901 Residential spec homes 16,591 — — — 16,591 Development & spec land 48,884 886 226 — 49,996 Commercial and industrial 327,970 7,448 13,667 — 349,085 Total commercial 1,617,673 20,820 37,102 — 1,675,595 Real estate Residential mortgage 590,593 — 5,494 — 596,087 Residential construction 15,805 — 222 — 16,027 Mortgage warehouse 94,508 — — — 94,508 Total real estate 700,906 — 5,716 — 706,622 Consumer Direct installment 36,577 — 160 — 36,737 Indirect installment 226,451 — 1,208 — 227,659 Home equity 192,884 — 1,976 — 194,860 Total consumer 455,912 — 3,344 — 459,256 Total $ 2,774,491 $ 20,820 $ 46,162 $ — $ 2,841,473 Percentage of total loans 97.64 % 0.73 % 1.62 % 0.00 %

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	December 31 2018 December 31 2017 Land $ 21,604 $ 21,633 Buildings and improvements 69,590 68,447 Furniture and equipment 24,596 22,288 Total cost 115,790 112,368 Accumulated depreciation (41,459 ) (36,839 ) Net premises and equipment $ 74,331 $ 75,529

Loan Servicing (Tables)

Loan Servicing (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Originated Mortgage Servicing Rights	December 31 2018 December 31 2017 December 31 2016 Mortgage servicing rights Balances, January 1 $ 12,189 $ 11,681 $ 9,271 Servicing rights capitalized 1,883 2,109 3,426 Amortization of servicing rights (1,196 ) (1,601 ) (1,016 ) Balances, December 31 12,876 12,189 11,681 Impairment allowance Balances, January 1 (587 ) (507 ) (397 ) Additions (78 ) (85 ) (236 ) Reductions 138 5 126 Balances, December 31 (527 ) (587 ) (507 ) Mortgage servicing rights, net $ 12,349 $ 11,602 $ 11,174

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	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. December 31 2018 December 31 2017 Balance, January 1 $ 119,880 $ 76,941 Goodwill acquired — 42,939 Balance, December 31 $ 119,880 $ 119,880
Amortizable Intangible Assets	Amortizable intangible assets are summarized as follows: December 31, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortizable intangible assets Core deposit intangible $ 20,711 $ (10,321 ) $ 20,711 $ (8,309 )
Estimated Amortization	Estimated amortization for the years ending December 31 is as follows: 2019 $ 1,787 2020 1,481 2021 1,394 2022 1,375 2023 1,281 Thereafter 3,072 $ 10,390

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposits	December 31 2018 December 31 2017 Noninterest-bearing demand deposits $ 642,129 $ 601,805 Interest-bearing demand deposits 864,026 909,638 Money market (variable rate) 420,123 378,108 Savings deposits 400,187 424,500 Certificates of deposit of $250,000 or more 371,824 130,585 Other certificates and time deposits 441,087 436,367 Total deposits $ 3,139,376 $ 2,881,003
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 2019 $ 498,382 $ 27,565 $ 525,947 2020 112,944 24,530 137,474 2021 48,422 20,535 68,957 2022 16,029 15,256 31,285 2023 14,052 16,698 30,750 Thereafter 18,498 — 18,498 $ 708,327 $ 104,584 $ 812,911

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowings	December 31 December 31 2018 2017 Federal Home Loan Bank advances, variable and fixed rates ranging from 1.51% to 7.53%, due at various dates through November 15, 2024 $ 356,579 $ 336,308 Securities sold under agreements to repurchase 52,116 61,097 Federal Reserve Bank discount window — 11,000 Federal funds purchased 141,689 143,252 Notes payable, variable rate of 2.75%, due at various dates through July 13, 2019 — 12,500 Total borrowings $ 550,384 $ 564,157
Contractual Maturities	Contractual maturities in years ending December 31 are as follows: 2019 $ 485,557 2020 37,472 2021 5,042 2022 12,154 2023 114 Thereafter 10,045 $ 550,384

Repurchase Agreements (Tables)

Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Summary of Repurchase Agreements Accounted as Secured Borrowings	The following table shows repurchase agreements accounted for as secured borrowings: December 31, 2018 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to one year One to three years Three to five years Five to ten years Beyond ten years Total Repurchase Agreements and repurchase-to-maturity transactions Repurchase Agreements $ 52,116 $ — $ — $ — $ — $ — $ 52,116 Securities pledged for Repurchase Agreements Federal agency collateralized mortgage obligations $ 31,454 $ — $ — $ — $ — $ — $ 31,454 Federal agency mortgage-backed pools 27,354 — — — — — 27,354 Total $ 58,808 $ — $ — $ — $ — $ — $ 58,808

Income Tax (Tables)

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Reconciliation of Income Taxes	December 31 2018 December 31 2017 December 31 2016 Income tax expense Currently payable Federal $ 9,166 $ 12,079 $ 7,467 Deferred Federal 1,277 331 1,334 Revaluation of deferred tax assets — 2,426 — Total income tax expense $ 10,443 $ 14,836 $ 8,801 Reconciliation of federal statutory to actual tax expense Federal statutory income tax at 21% in 2018 and 35 $ 13,348 $ 16,783 $ 11,450 Tax exempt interest (1,982 ) (2,699 ) (1,882 ) Tax exempt income (448 ) (638 ) (575 ) Stock compensation (384 ) (546 ) — Revaluation of deferred tax assets — 2,426 — Other tax exempt income (260 ) (456 ) (608 ) Nondeductible and other 169 (34 ) 416 Actual tax expense $ 10,443 $ 14,836 $ 8,801
Reconciliation of Deferred Tax Assets & Liabilities	December 31 2018 December 31 2017 Assets Allowance for loan losses $ 3,831 $ 3,396 Net operating loss and tax credits (from acquisitions) 1,038 1,658 Director and employee benefits 2,392 2,276 Unrealized loss on AFS securities and fair value hedge 2,165 1,147 Accrued pension 801 852 Fair value adjustment on acquisitions — 1,087 Other 670 1,083 Total assets 10,897 11,499 Liabilities Depreciation (1,850 ) (1,680 ) State tax (137 ) (210 ) Federal Home Loan Bank stock dividends (330 ) (339 ) Difference in basis of intangible assets (2,919 ) (2,831 ) Fair value adjustment on acquisitions (62 ) — Other (119 ) (125 ) Total liabilities (5,417 ) (5,185 ) Valuation allowance (1,038 ) (1,613 ) Net deferred tax asset $ 4,442 $ 4,701

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss included in capital are as follows: December 31 2018 December 31 2017 Unrealized loss on securities available for sale $ (8,561 ) $ (3,937 ) Unamortized gain on securities held to maturity, previously transferred from AFS 10 200 Unrealized loss on derivative instruments (1,760 ) (1,728 ) Tax effect 2,167 1,914 Total accumulated other comprehensive loss $ (8,144 ) $ (3,551 )

Regulatory Capital (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Summary of Regulatory Capital Requirement	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, 2018 and 2017 were as follows: Actual Required for Capital 1 ‎ Adequacy Purposes Required For Capital 1 ‎ Adequacy Purposes ‎ with Capital Buffer Well Capitalized Under ‎ Prompt 1 Corrective Action ‎ Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio December 31, 2018 Total capital 1 Consolidated $ 427,616 13.39 % $ 255,419 8.00 % $ 315,283 9.875 % N/A N/A Bank 396,755 12.43 % 255,419 8.00 % 315,283 9.875 % $ 319,274 10.00 % Tier 1 capital 1 Consolidated 409,760 12.83 % 191,565 6.00 % 251,429 7.875 % N/A N/A Bank 378,899 11.87 % 191,565 6.00 % 251,429 7.875 % 255,420 8.00 % Common equity tier 1 capital 1 Consolidated 371,297 11.63 % 143,673 4.50 % 203,537 6.375 % N/A N/A Bank 378,899 11.87 % 143,674 4.50 % 203,537 6.375 % 207,528 6.50 % Tier 1 capital 1 Consolidated 409,760 10.12 % 162,033 4.00 % 162,033 4.000 % N/A N/A Bank 378,899 9.34 % 162,327 4.00 % 162,327 4.000 % 202,908 5.00 % December 31, 2017 Total capital 1 Consolidated $ 384,800 12.91 % $ 238,543 8.00 % $ 275,816 9.25 % N/A N/A Bank 382,788 12.85 % 238,386 8.00 % 275,634 9.25 % $ 297,982 10.00 % Tier 1 capital 1 Consolidated 368,355 12.35 % 178,907 6.00 % 216,180 7.25 % N/A N/A Bank 366,343 12.29 % 178,790 6.00 % 216,038 7.25 % 238,386 8.00 % Common equity tier 1 capital 1 Consolidated 329,892 11.06 % 134,181 4.50 % 171,454 5.75 % N/A N/A Bank 366,343 12.29 % 134,092 4.50 % 171,340 5.75 % 193,689 6.50 % Tier 1 capital 1 Consolidated 368,355 9.92 % 148,503 4.00 % 148,503 4.00 % N/A N/A Bank 366,343 9.89 % 148,116 4.00 % 148,116 4.00 % 185,145 5.00 %

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
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: Years Ended December 31 2018 2017 2016 Dividend yields 1.99 % 1.75 % 2.34 % Volatility factors of expected market price of common stock 28.60 % 28.52 % 28.60 % Risk-free interest rates 2.85 % 2.42 % 1.83 % Expected life of options 8 8 8
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, 2018 are presented below: Shares Weighted Average Grant Date Fair Value Non-vested, beginning of year 144,791 $ 13.32 Vested (43,519 ) 10.59 Granted 75,266 20.13 Non-vested, end of year 176,538 16.90
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, 2018, and changes during the year then ended, is presented below: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, beginning of year 41,175 $ 4.91 Exercised (19,875 ) 4.80 Outstanding, end of year 21,300 5.03 1.77 $ 229,004 Exercisable, end of year 21,300 5.03 1.77 229,004
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, 2018, and changes during the year then ended, is presented below: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, beginning of year 323,666 $ 11.50 Granted 31,122 19.31 Exercised (36,221 ) 10.34 Forfeited (11,250 ) 15.60 Outstanding, end of year 307,317 12.28 6.89 $ 1,077,096 Exercisable, end of year 191,410 10.67 6.19 977,748

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
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 Liability Derivatives December 31, 2018 December 31, 2018 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest rate contracts Loans $ — Loans $ 42 Interest rate contracts Other Assets 42 Other liabilities 1,760 Total derivatives desginated as hedging instruments 42 1,802 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 135 Other liabilities — Total derivatives not designated as hedging instruments 135 — Total derivatives $ 177 $ 1,802 Asset Derivatives Liability Derivatives December 31, 2017 December 31, 2017 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest rate contracts Loans $ — Loans $ 811 Interest rate contracts Other Assets 811 Other liabilities 1,728 Total derivatives desginated as hedging instruments 811 2,539 Derivatives not designated as hedging instruments Mortgage loan contracts Other assets 143 Other liabilities 3 Total derivatives not designated as hedging instruments 143 3 Total derivatives $ 954 $ 2,542
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 December 31 is as follows: Amount of (Gain) Loss Recognized in Other Derivative (Effective Portion) (Effective Portion) Years Ended December 31 2018 2017 2016 Derivatives in cash flow hedging relationship Interest rate contracts $ (25 ) $ 913 $ 6
Effect of Derivative Instruments on Consolidated Statement of Income Derivative in Fair Value Hedging Relationship	Amount of Gain (Loss) Location of gain (loss) Years Ended December 31 recognized on derivative 2018 2017 2016 Derivative in fair value hedging relationship Interest rate contracts Interest income - loans $ (852 ) $ (817 ) $ (1,776 ) Interest rate contracts Interest income - loans 852 817 1,776 Total $ — $ — $ — Amount of Gain (Loss) Location of gain (loss) Years Ended December 31 recognized on derivative 2018 2017 2016 Derivative not designated as hedging relationship Mortgage contracts Other income - $ (5 ) $ (439 ) $ (62 )

Disclosures about fair value _2

Disclosures about fair value of assets and liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
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: December 31, 2018 Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Treasury and federal agencies $ 16,608 $ — $ 16,608 $ — State and municipal 209,303 — 209,303 — Federal agency collateralized mortgage obligations 185,003 — 185,003 — Federal agency mortgage-backed pools 178,736 — 178,736 — Corporate notes 10,698 — 10,698 — Total available for sale securities 600,348 — 600,348 — Hedged loans 209,161 — 209,161 — Forward sale commitments 135 — 135 — Interest rate swap agreements (1,801 ) — (1,801 ) — Commitments to originate loans — — — — December 31, 2017 Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Treasury and federal agencies $ 19,052 $ — $ 19,052 $ — State and municipal 149,564 — 149,564 — Federal agency collateralized mortgage obligations 130,365 — 130,365 — Federal agency mortgage-backed pools 208,657 — 208,657 — Private labeled mortgage-backed pools 1,642 — 1,642 — Corporate notes 385 — 385 — Total available for sale securities 509,665 — 509,665 — Hedged loans 154,575 — 154,575 — Forward sale commitments 143 — 143 — Interest rate swap agreements (917 ) — (917 ) — Commitments to originate loans (3 ) — (3 ) —
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: Years Ended December 31 2018 2017 2016 Non-interest Income Total gains and losses from: Hedged loans $ (852 ) $ (817 ) $ (1,776 ) Fair value interest rate swap agreements 852 817 1,776 Derivative loan commitments (5 ) (439 ) (62 ) $ (5 ) $ (439 ) $ (62 )
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 Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2018 Impaired loans $ 5,661 $ — $ — $ 5,661 Mortgage servicing rights 12,349 — — 12,349 December 31, 2017 Impaired loans $ 6,957 $ — $ — $ 6,957 Mortgage servicing rights 11,602 — — 11,602
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, 2018 and 2017. December 31, 2018 Fair Valuation Unobservable Range Value Technique Inputs (Weighted Average) Impaired loans $ 5,661 Collateral based measurement Discount to reflect current market conditions and ultimate collectability 0 100 15.5 Mortgage servicing rights 12,349 Discounted cash flows Discount rate, Constant prepayment rate, Probability of default 10.2 11.0 ( 10.3 9.1 21.9 9.3 December 31, 2017 Fair Valuation Unobservable Range Value Technique Inputs (Weighted Average) Impaired loans $ 6,957 Collateral based measurement Discount to reflect current market conditions and ultimate collectability 0 46.8 2.6 Mortgage servicing rights 11,602 Discounted cash flows Discount rate, Constant prepayment rate, Probability of default 9.6 10.8 9.7 9.2 27.7 10.5 0 1.5 0.2

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Cash and due from banks $ 58,492 $ 58,492 $ — $ — Interest-earning time deposits 15,744 — 15,542 — Investment securities, held to maturity 210,112 — 208,273 — Loans held for sale 1,038 — — 1,038 Loans (excluding loan level hedges), net 2,786,351 — — 2,681,741 Stock in FHLB 18,073 — 18,073 — Interest receivable 14,239 — 14,239 — Liabilities Non-interest bearing deposits $ 642,129 $ 642,129 $ — $ — Interest bearing deposits 2,497,247 — 2,377,274 — Borrowings 550,384 — 542,311 — Subordinated debentures 37,837 — 35,711 — Interest payable 2,031 — 2,031 — December 31, 2017 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Cash and due from banks $ 76,441 $ 76,441 $ — $ — Interest-earning time deposits 16,461 — 16,632 — Investment securities, held to maturity 200,448 — 201,085 — Loans held for sale 3,094 — — 3,094 Loans (excluding loan level hedges), net 2,664,211 — — 2,589,064 Stock in FHLB 18,105 — 18,105 — Interest receivable 13,059 — 13,059 — Liabilities Non-interest bearing deposits $ 601,805 $ 601,805 $ — $ — Interest bearing deposits 2,279,198 — 2,156,487 — Borrowings 564,157 — 560,057 — Subordinated debentures 37,653 — 35,994 — Interest payable 886 — 886 —

Condensed Financial Informati_2

Condensed Financial Information (Parent Company Only) (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets December 31 2018 December 31 2017 Assets Total cash and cash equivalents $ 30,653 $ 13,361 Investment in subsidiaries 502,844 497,623 Other assets 1,186 1,318 Total assets $ 534,683 $ 512,302 Liabilities Borrowings $ — $ 12,500 Subordinated debentures 37,837 37,653 Other liabilities 4,854 5,071 Stockholders’ Equity 491,992 457,078 Total liabilities and stockholders’ equity $ 534,683 $ 512,302
Condensed Statements of Income	Condensed Statements of Income Years Ended December 31 2018 2017 2016 Operating Income (Expense) Dividend income from subsidiaries $ 46,950 $ 27,000 $ 20,000 Investment income — — 33 Other income — 540 42 Interest expense (2,475 ) (2,791 ) (2,376 ) Employee benefit expense (1,423 ) (1,094 ) (1,158 ) Other expense (357 ) (326 ) 1,279 Income Before Undistributed Income of Subsidiaries 42,695 23,329 17,820 Undistributed Income of Subsidiaries 9,643 8,804 5,938 Income Before Tax 52,338 32,133 23,758 Income Tax Benefit 779 984 154 Net Income 53,117 33,117 23,912 Preferred stock dividend — — (42 ) Net Income Available to Common Shareholders $ 53,117 $ 33,117 $ 23,870
Condensed Statements of Comprehensive Income	Condensed Statements of Comprehensive Income Years Ended December 31 2018 2017 2016 Net Income $ 53,117 $ 33,117 $ 23,912 Other Comprehensive Income (Loss) Change in fair value of derivative instruments, net of taxes (25 ) 913 6 Unrealized appreciation for the period on held to maturity securities, net of taxes (150 ) (166 ) (424 ) Unrealized appreciation (depreciation) on available for sale securities, net of taxes (4,003 ) 1,371 (3,310 ) Less: reclassification adjustment for realized (gains) losses included in net income, net of taxes 351 (25 ) (1,193 ) (3,827 ) 2,093 (4,921 ) Comprehensive Income $ 49,290 $ 35,210 $ 18,991
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows Years Ended December 31 2018 2017 2016 Operating Activities Net income $ 53,117 $ 33,117 $ 23,912 Items not requiring (providing) cash Equity in undistributed net income of subsidiaries (9,643 ) (8,804 ) (5,938 ) Change in: Share based compensation 251 325 284 Amortization of unearned compensation 169 135 324 Other assets 132 388 888 Other liabilities 378 (1,675 ) (244 ) Net cash provided by operating activities 44,404 23,486 19,226 Investing Activities Acquisition of Kosciusko — — (6,741 ) Acquisition of LaPorte — — (17,108 ) Acquisition of CNB — — (5,296 ) Acquisition of Lafayette — (1,254 ) — Acquisition of Wolverine — (7,688 ) — Net cash used in investing activities — (8,942 ) (29,145 ) Financing Activities Redemption of preferred stock — — (12,500 ) Net change in borrowings (12,316 ) (6,803 ) 19,500 Dividends paid on preferred shares — — (42 ) Dividends paid on common shares (15,418 ) (11,720 ) (8,382 ) Proceeds from issuance of stock 622 1,604 572 Net cash used in financing activities (27,112 ) (16,919 ) (852 ) Net Change in Cash and Cash Equivalents 17,292 (2,375 ) (10,771 ) Cash and Cash Equivalents at Beginning of Year 13,361 15,736 26,507 Cash and Cash Equivalents at End of Year $ 30,653 $ 13,361 $ 15,736

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
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 March 31 June 30 September 30 December 31 2018 2018 2018 2018 Interest income $ 39,426 $ 40,741 $ 42,271 $ 43,730 Interest expense 6,015 7,191 8,499 9,894 Net interest income 33,411 33,550 33,772 33,836 Provision for loan losses 567 635 1,176 528 Gain (loss) on sale of securities 11 — (122 ) (332 ) Net income $ 12,804 $ 14,115 $ 13,065 $ 13,133 Earnings per share: Basic $ 0.33 $ 0.37 $ 0.34 $ 0.35 Diluted 0.33 0.37 0.34 0.34 Average shares outstanding: Basic 38,306,395 38,347,612 38,365,379 38,367,972 Diluted 38,468,810 38,519,401 38,534,970 38,488,861 Three Months Ended March 31 June 30 September 30 December 31 2017 2017 2017 2017 Interest income $ 28,834 $ 30,805 $ 32,070 $ 36,774 Interest expense 3,266 3,607 4,191 5,319 Net interest income 25,568 27,198 27,879 31,455 Provision for loan losses 330 330 710 1,100 Gain on sale of securities 35 (3 ) 6 — Net income $ 8,224 $ 9,072 $ 8,171 $ 7,650 Earnings per share: Basic $ 0.25 $ 0.27 $ 0.24 $ 0.20 Diluted 0.25 0.27 0.24 0.20 Average shares outstanding: Basic 33,263,289 33,264,697 33,870,240 37,711,200 Diluted 33,489,106 33,483,584 34,072,909 37,893,014

Nature of Operations and Summ_4

Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)Facilitiesshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares
Schedule Of Accounting Policies [Line Items]
Full service facilities maintained by bank | Facilities	62
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	57.00%
Residential real estate loans as a percentage of total loan	22.00%
Installment loans as a percentage of total loan	18.00%
Mortgage warehouse loans as a percentage of total loan	3.00%
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
Useful Life for depreciation	2 months
Intangibles, Gross	$ 10,400,000
Uncertain tax positions recognized	50.00%
Shares, non-dilutive | shares	102,138	0	0
Amount available for payment of dividend	$ 26,000,000
Compensation expense	626,000	$ 460,000	$ 608,000
Reclassifications effect on net income	0
Available for Sale Of Securities	$ 600,348,000	509,665,000
Measurement Input, Discount Rate [Member]
Schedule Of Accounting Policies [Line Items]
Factor considered to be significant for fair value measurement	10
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
Accounting Standards Update 2018-02 [Member]
Schedule Of Accounting Policies [Line Items]
Stranded tax effects included in AOCI		$ 766,000
Accounting Standards Update 2017-12 [Member]
Schedule Of Accounting Policies [Line Items]
Net Unrealized Losses	$ 6,300,000
Available for Sale Of Securities	$ 46,000

Nature of Operations and Summ_5

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic earnings per share
Net income	$ (13,133)	$ (13,065)	$ (14,115)	$ (12,804)	$ (7,650)	$ (8,171)	$ (9,072)	$ (8,224)	$ (53,117)	$ (33,117)	$ (23,912)
Less: Preferred stock dividends									0	0	42
Net Income Available to Common Shareholders									$ (53,117)	$ (33,117)	$ (23,870)
Weighted average common shares outstanding	38,367,972	38,365,379	38,347,612	38,306,395	37,711,200	33,870,240	33,264,697	33,263,289	38,347,059	34,553,736	29,981,592
Basic Earnings Per Share	$ 0.35	$ 0.34	$ 0.37	$ 0.33	$ 0.20	$ 0.24	$ 0.27	$ 0.25	$ 1.39	$ 0.96	$ 0.80
Diluted earnings per share
Net income available to common shareholders									$ 53,117	$ 33,117	$ 23,870
Weighted average common shares outstanding	38,367,972	38,365,379	38,347,612	38,306,395	37,711,200	33,870,240	33,264,697	33,263,289	38,347,059	34,553,736	29,981,592
Effect of dilutive securities:
Weighted average common shares outstanding	38,488,861	38,534,970	38,519,401	38,468,810	37,893,014	34,072,909	33,483,584	33,489,106	38,495,231	34,760,438	30,123,614
Diluted Earnings Per Share	$ 0.34	$ 0.34	$ 0.37	$ 0.33	$ 0.20	$ 0.24	$ 0.27	$ 0.25	$ 1.38	$ 0.95	$ 0.79
Restricted Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities									36,185	46,981	39,829
Stock Options [Member]
Effect of dilutive securities:
Effect of dilutive securities									111,987	159,721	102,193

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Sep. 01, 2017	Feb. 03, 2017	Jul. 18, 2016	Jun. 01, 2016	Oct. 17, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2017	Nov. 07, 2016
Business Acquisition [Line Items]
Common stock, shares outstanding						38,375,407	38,294,729
Acquisition of goodwill						$ 119,880	$ 119,880	$ 76,941
Ownership interest percentage	5.00%
Operating revenue, net of tax							2,600	4,300
Non-recurring expense, net of tax							2,700	4,800
Kosciusko Financial Inc [Member]
Business Acquisition [Line Items]
Exchange ratio per share				6.7775%
Cash paid for each share				$ 81.75
Common stock issued				1,310,145
Market closing price per share				$ 11.04
Estimated transaction value				$ 23,000
Costs related to the acquisition				2,000
Total purchase price				22,983
Net intangible assets acquired				526
Acquisition of goodwill				$ 6,443
Core deposit intangible amortization period						10 years
Payments received as cash consideration								(30,437)
Business combination stock transferred, percentage of consideration				65.00%
Business combination cash transferred, percentage of consideration				35.00%
Kosciusko Financial Inc [Member] | Maximum [Member]
Business Acquisition [Line Items]
Number of shares owned				100
Share of common stock outstanding per share				$ 81.75
LaPorte Bancorp Inc [Member]
Business Acquisition [Line Items]
Exchange ratio per share			1.4153%
Cash paid for each share			$ 17.50
Common stock issued			5,132,232
Market closing price per share			$ 12.24
Estimated transaction value			$ 98,600
Costs related to the acquisition								$ 4,000
Total purchase price			98,634
Net intangible assets acquired			2,514
Acquisition of goodwill			$ 20,993
Core deposit intangible amortization period								10 years
Payments received as cash consideration								$ (116,521)
Business combination stock transferred, percentage of consideration			65.00%
Business combination cash transferred, percentage of consideration			35.00%
Central National Bank & Trust [Member]
Business Acquisition [Line Items]
Costs related to the acquisition								$ 779
Total purchase price										$ 5,311
Net intangible assets acquired										190
Acquisition of goodwill										609
Purchase price of the business assets, portion deductible										5,300
Core deposit intangible amortization period								10 years
Payments received as cash consideration								$ (22,549)
Performing portion of the loan portfolio acquired										10,800
Estimated fair value of performing portion of the loan portfolio										$ 10,500
Wolverine Bancorp Inc [Member]
Business Acquisition [Line Items]
Exchange ratio per share					1.5228%
Cash paid for each share					$ 14
Common stock, shares outstanding					2,129,331
Common stock issued					3,241,045
Market closing price per share					$ 19.37
Estimated transaction value					$ 93,800
Costs related to the acquisition					1,900
Total purchase price					93,773
Net intangible assets acquired					2,024
Acquisition of goodwill					$ 26,827
Core deposit intangible amortization period						10 years
Payments received as cash consideration							(12,723)
Lafayette Community Bancorp [Member]
Business Acquisition [Line Items]
Exchange ratio per share	0.8817%
Cash paid for each share	$ 1.73
Common stock, shares outstanding	1,856,679
Common stock issued	1,636,888
Market closing price per share									$ 17.45
Estimated transaction value									$ 34,500
Costs related to the acquisition	$ 1,700
Total purchase price	34,465
Net intangible assets acquired	2,085
Acquisition of goodwill	15,408
Core deposit intangible amortization period						10 years
Gain on remeasurement of equity interest	$ 530						530
Payments received as cash consideration							$ (20,425)
Lafayette Community Bancorp [Member] | Maximum [Member]
Business Acquisition [Line Items]
Number of shares owned	100
Share of common stock outstanding per share	$ 17.25
First Farmers Bank & Trust Co [Member]
Business Acquisition [Line Items]
Net intangible assets acquired		$ 452
Core deposit intangible amortization period		10 years
Payments received as cash consideration		$ 11,000
Business acquisition, loans assumed		$ 3,400
Premium on deposits paid		3.00%
Business acquisition, customer deposit balances		$ 14,800

Acquisitions - Schedule of Fina

Acquisitions - Schedule of Final Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Oct. 17, 2017	Dec. 31, 2016	Nov. 07, 2016
Loans
Goodwill	$ 119,880	$ 119,880		$ 76,941
Central National Bank & Trust [Member]
Assets
Cash and due from banks					$ 27,860
Investment securities, available for sale					16,393
Loans
Total loans					10,470
Premises and equipment, net					444
FHLB stock					50
Goodwill					609
Core deposit intangible					190
Interest receivable					154
Other assets					49
Total assets purchased					56,219
Cash paid					5,311
Total purchase price					5,311
Deposits
Non-interest bearing					24,079
NOW accounts					9,038
Savings and money market					13,829
Certificates of deposit					3,342
Total deposits					50,288
Borrowings					459
Interest payable					7
Other liabilities					154
Total liabilities assumed					50,908
Central National Bank & Trust [Member] | Residential Mortgage [Member]
Loans
Total loans					6,624
Central National Bank & Trust [Member] | Commercial [Member]
Loans
Total loans					2,267
Central National Bank & Trust [Member] | Consumer [Member]
Loans
Total loans					$ 1,579
Wolverine Bancorp Inc [Member]
Assets
Cash and due from banks			$ 44,450
Loans
Total loans			310,667
Premises and equipment, net			2,941
FRB and FHLB stock			2,700
Goodwill			26,827
Core deposit intangible			2,024
Interest receivable			584
Other assets			3,897
Total assets purchased			394,090
Common shares issued			62,111
Cash paid			31,662
Total purchase price			93,773
Deposits
Non-interest bearing			25,221
NOW accounts			8,026
Savings and money market			129,044
Certificates of deposit			94,688
Total deposits			256,979
Borrowings			36,970
Interest payable			214
Other liabilities			6,154
Total liabilities assumed			300,317
Wolverine Bancorp Inc [Member] | Residential Mortgage [Member]
Loans
Total loans			30,603
Wolverine Bancorp Inc [Member] | Commercial [Member]
Loans
Total loans			276,167
Wolverine Bancorp Inc [Member] | Consumer [Member]
Loans
Total loans			$ 3,897

Acquisitions - Schedule of Acqu

Acquisitions - Schedule of Acquired Loans Accounted for in Accordance with ASC 310-30 (Detail) - USD ($) $ in Thousands	Oct. 17, 2017	Sep. 01, 2017	Jul. 18, 2016	Jun. 01, 2016
LaPorte 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			$ 12,545
Contractual cash flows not expected to be collected (nonaccretable differences)			4,492
Expected cash flows at acquisition			8,053
Interest component of expected cash flows (accretable discount)			1,258
Fair value of acquired loans accounted for under ASC 310-30			$ 6,795
Kosciusko Financial 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				$ 2,682
Contractual cash flows not expected to be collected (nonaccretable differences)				25
Expected cash flows at acquisition				2,657
Interest component of expected cash flows (accretable discount)				634
Fair value of acquired loans accounted for under ASC 310-30				$ 2,023
Wolverine 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	$ 21,912
Contractual cash flows not expected to be collected (nonaccretable differences)	1,832
Expected cash flows at acquisition	20,080
Interest component of expected cash flows (accretable discount)	2,267
Fair value of acquired loans accounted for under ASC 310-30	$ 17,813
Lafayette Community Bancorp [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest at acquisition		$ 6,128
Contractual cash flows not expected to be collected (nonaccretable differences)		1,326
Expected cash flows at acquisition		4,802
Interest component of expected cash flows (accretable discount)		933
Fair value of acquired loans accounted for under ASC 310-30		$ 3,869

Acquisitions - Schedule of Purc

Acquisitions - Schedule of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017	Sep. 01, 2017	Dec. 31, 2016	Jul. 18, 2016	Jun. 01, 2016
Loans
Goodwill		$ 119,880	$ 119,880		$ 76,941
LaPorte Bancorp Inc [Member]
Assets
Cash and due from banks						$ 154,849
Investment securities, available for sale						23,779
Loans
Total loans						312,906
Premises and equipment, net						6,022
FHLB stock						4,029
Goodwill						20,993
Core deposit intangible						2,514
Interest receivable						844
Cash value of life insurance						15,267
Other assets						8,334
Total assets purchased						549,537
Common shares issued						60,306
Cash paid						38,328
Total purchase price						98,634
Deposits
Non-interest bearing						66,733
NOW accounts						99,346
Savings and money market						117,688
Certificates of deposit						87,605
Total deposits						371,372
Borrowings						64,793
Subordinated debt						4,504
Interest payable						178
Other liabilities						10,056
Total liabilities assumed						450,903
LaPorte Bancorp Inc [Member] | Residential Mortgage [Member]
Loans
Total loans						42,603
LaPorte Bancorp Inc [Member] | Mortgage Warehousing [Member]
Loans
Total loans						99,752
LaPorte Bancorp Inc [Member] | Commercial [Member]
Loans
Total loans						153,750
LaPorte Bancorp Inc [Member] | Consumer [Member]
Loans
Total loans						$ 16,801
Kosciusko Financial Inc [Member]
Assets
Cash and due from banks							$ 38,950
Investment securities, available for sale							1,191
Loans
Total loans							102,569
Premises and equipment, net							1,466
FHLB stock							582
Goodwill							6,443
Core deposit intangible							526
Interest receivable							636
Cash value of life insurance							2,745
Other assets							765
Total assets purchased							155,873
Common shares issued							14,470
Cash paid							8,513
Total purchase price							22,983
Deposits
Non-interest bearing							27,871
NOW accounts							35,213
Savings and money market							26,953
Certificates of deposit							32,771
Total deposits							122,808
Borrowings							9,038
Interest payable							55
Other liabilities							989
Total liabilities assumed							132,890
Kosciusko Financial Inc [Member] | Residential Mortgage [Member]
Loans
Total loans							26,244
Kosciusko Financial Inc [Member] | Commercial [Member]
Loans
Total loans							70,006
Kosciusko Financial Inc [Member] | Consumer [Member]
Loans
Total loans							$ 6,319
Lafayette Community Bancorp [Member]
Assets
Cash and due from banks				$ 24,846
Investment securities, available for sale				6
Loans
Total loans				134,299
Premises and equipment, net				7,818
FHLB stock				395
Goodwill				15,408
Core deposit intangible				2,085
Interest receivable				338
Other assets				1,649
Total assets purchased				186,844
Common shares issued	[1]			30,044
Cash paid				4,421
Total purchase price				34,465
Deposits
Non-interest bearing				34,990
NOW accounts				30,174
Savings and money market				53,663
Certificates of deposit				32,520
Total deposits				151,347
Interest payable				42
Other liabilities				990
Total liabilities assumed				152,379
Lafayette Community Bancorp [Member] | Residential Mortgage [Member]
Loans
Total loans				12,761
Lafayette Community Bancorp [Member] | Commercial [Member]
Loans
Total loans				116,258
Lafayette Community Bancorp [Member] | Consumer [Member]
Loans
Total loans				$ 5,280
[1]	This includes $955,000 of common shares previously held by Horizon.

Acquisitions - Schedule of Pu_2

Acquisitions - Schedule of Purchase Price of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail)	Jul. 18, 2016USD ($)
Lafayette Community Bancorp [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Common shares previously held	$ 955,000

Acquisitions - Pro Forma Result

Acquisitions - Pro Forma Result of Comparable Prior Reporting Period (Detail) - Peoples Bancorp Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net Interest Income	$ 125,442	$ 115,860
Provision for loan losses	(12)	1,082
Net Interest Income after Provision for Loan Losses	125,454	114,778
Non-interest Income	33,959	43,330
Non-interest Expense	109,605	119,522
Income before Income Taxes	49,808	38,586
Income Tax Expense	16,204	12,072
Net Income	33,604	26,514
Net Income Available to Common Shareholders	$ 33,604	$ 26,472
Basic Earnings Per Share	$ 0.97	$ 0.88
Diluted Earnings Per Share	$ 0.97	$ 0.88

Cash Equivalents - Additional I

Cash Equivalents - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Cash and Cash Equivalents [Abstract]
Cash equivalent maximum maturity period	3 months
Increase in Cash account over the insured limit	$ 10.3
Uninsured Amount	$ 3.5

Securities - Fair Value of Secu

Securities - Fair Value of Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	$ 608,909	$ 513,602
Gross Unrealized Gains	2,308	2,502
Gross Unrealized Losses	(10,869)	(6,439)
Available-for-sale Securities, Fair Value	600,348	509,665
Held-to-maturity, Amortized Cost	210,112	200,448
Held-to-maturity, Gross Unrealized Gains	1,853	3,726
Held-to-maturity, Gross Unrealized Losses	(3,692)	(3,089)
Held-to-maturity, Fair Value	208,273	201,085
State and Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	210,386	148,045
Gross Unrealized Gains	1,495	2,189
Gross Unrealized Losses	(2,578)	(670)
Available-for-sale Securities, Fair Value	209,303	149,564
Held-to-maturity, Amortized Cost	191,269	179,836
Held-to-maturity, Gross Unrealized Gains	1,773	3,493
Held-to-maturity, Gross Unrealized Losses	(3,366)	(2,932)
Held-to-maturity, Fair Value	189,676	180,397
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	187,563	132,871
Gross Unrealized Gains	625	45
Gross Unrealized Losses	(3,185)	(2,551)
Available-for-sale Securities, Fair Value	185,003	130,365
Held-to-maturity, Amortized Cost	5,144	5,734
Held-to-maturity, Gross Unrealized Gains	6	17
Held-to-maturity, Gross Unrealized Losses	(120)	(69)
Held-to-maturity, Fair Value	5,030	5,682
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	183,479	211,487
Gross Unrealized Gains	80	155
Gross Unrealized Losses	(4,823)	(2,985)
Available-for-sale Securities, Fair Value	178,736	208,657
Held-to-maturity, Amortized Cost	13,699	14,878
Held-to-maturity, Gross Unrealized Gains	74	216
Held-to-maturity, Gross Unrealized Losses	(206)	(88)
Held-to-maturity, Fair Value	13,567	15,006
U.S. Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	16,815	19,277
Gross Unrealized Gains	1
Gross Unrealized Losses	(208)	(225)
Available-for-sale Securities, Fair Value	16,608	19,052
Private Labeled Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost		1,650
Gross Unrealized Losses		(8)
Available-for-sale Securities, Fair Value		1,642
Corporate Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	10,666	272
Gross Unrealized Gains	107	113
Gross Unrealized Losses	(75)
Available-for-sale Securities, Fair Value	$ 10,698	$ 385

Securities - Additional Informa

Securities - Additional Information (Detail)	Apr. 01, 2014USD ($)Security	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Investments, Debt and Equity 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	(3,802,000)	$ 1,180,000	$ (4,927,000)
Unrealized gain or loss, Held to maturity		0
Tax effect of the proceeds from sale of securities		(93,000)	$ 13,000	$ 643,000
Pledged of Fair Value of Securities as collateral		58,800,000
Amortization cost of securities as Collateral not Separately Reported		60,700,000
Debt Instrument Repurchase Agreement		52,100,000
Securities Pledged for Federal Home Loan Bank At Fair Value		96,200,000
Securities for Federal Home Loan Bank Not Separately Reported		95,900,000
Securities Pledged For Derivative At Fair Value		11,100,000
Securities Pledged For Derivative At Amortized Cost		11,200,000
Debt Instrument Derivative Swap Agreement		1,800,000
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, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost within one year	$ 20,532	$ 13,347
Amortized cost one to five years	42,476	40,468
Amortized cost for five to ten years	107,839	50,473
Amortized cost for after ten years	67,020	63,306
Total amortized cost	237,867	167,594
Total available for sale investment securities, Amortized Cost	608,909	513,602
Within one year, amortized cost	70	1,948
One to five years, amortized cost	48,732	40,603
Five to ten years, amortized cost	101,809	89,801
After ten years, amortized cost	40,658	47,484
Total amortized cost	191,269	179,836
Total held to maturity investment securities, amortized cost	210,112	200,448
Fair value within one year	20,448	13,326
Fair value for one to five years	41,705	40,193
Fair value for five to ten years	107,107	51,156
Fair value for after ten years	67,349	64,326
Total fair value	236,609	169,001
Investment securities, available for sale	600,348	509,665
Within one year, fair value	70	1,934
One to five years, fair value	49,324	41,531
five to ten years, fair value	101,533	91,249
After ten years, fair value	38,749	45,683
Total fair value	189,676	180,397
Held-to-maturity, Fair Value	208,273	201,085
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	187,563	132,871
Total held to maturity investment securities, amortized cost	5,144	5,734
Investment securities, available for sale	185,003	130,365
Held-to-maturity, Fair Value	5,030	5,682
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost	183,479	211,487
Total held to maturity investment securities, amortized cost	13,699	14,878
Investment securities, available for sale	178,736	208,657
Held-to-maturity, Fair Value	$ 13,567	15,006
Private Labeled Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Total available for sale investment securities, Amortized Cost		1,650
Investment securities, available for sale		$ 1,642

Securities - Gross Unrealized L

Securities - Gross Unrealized Losses and Fair Value of Company's Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	$ 92,615	$ 229,768
Fair value more than 12 months	398,164	193,869
Total fair value	490,779	423,637
Unrealized losses less than 12 months	(1,767)	(4,554)
Unrealized losses more than 12 months	(12,794)	(4,974)
Total unrealized losses	(14,561)	(9,528)
U.S. Treasury and Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months		15,882
Fair value more than 12 months	9,707	2,870
Total fair value	9,707	18,752
Unrealized losses less than 12 months		(180)
Unrealized losses more than 12 months	(208)	(45)
Total unrealized losses	(208)	(225)
State and Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	75,163	54,312
Fair value more than 12 months	106,335	30,691
Total fair value	181,498	85,003
Unrealized losses less than 12 months	(1,628)	(2,758)
Unrealized losses more than 12 months	(4,316)	(844)
Total unrealized losses	(5,944)	(3,602)
Federal Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	6,450	54,006
Fair value more than 12 months	106,257	73,462
Total fair value	112,707	127,468
Unrealized losses less than 12 months	(25)	(589)
Unrealized losses more than 12 months	(3,280)	(2,031)
Total unrealized losses	(3,305)	(2,620)
Federal Agency Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	5,739	103,926
Fair value more than 12 months	175,865	86,846
Total fair value	181,604	190,772
Unrealized losses less than 12 months	(39)	(1,019)
Unrealized losses more than 12 months	(4,990)	(2,054)
Total unrealized losses	(5,029)	(3,073)
Private Labeled Mortgage-backed Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months		1,642
Total fair value		1,642
Unrealized losses less than 12 months		(8)
Total unrealized losses		$ (8)
Corporate Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value less than 12 months	5,263
Total fair value	5,263
Unrealized losses less than 12 months	(75)
Total unrealized losses	$ (75)

Securities - Sales of Securitie

Securities - Sales of Securities Available for Sale (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 38,519	$ 5,490	$ 182,549
Gross gains	37	151	2,646
Gross losses	$ (480)	$ (113)	$ (810)

Loans - Amounts of Loans (Detai

Loans - Amounts of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage warehouse	$ 74,120	$ 94,508
Total loans	3,013,332	2,835,180
Allowance for loan losses	(17,820)	(16,394)	$ (14,837)	$ (14,534)
Loans, net	2,995,512	2,818,786
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	1,721,590	1,669,934
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	668,141	609,739
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	549,481	460,999
Working Capital and Equipment [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	804,083	720,477
Real Estate Including Agriculture [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	834,037	880,861
Tax Exempt Loans Receivable [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	48,975	36,324
Other Commercial Loans [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	34,495	32,272
1-4 Family [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	659,754	602,196
Other Real Estate Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate, Total	8,387	7,543
Auto [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	327,413	244,003
Recreation Consumer Loans Receivable [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	13,975	8,728
Real Estate Home Improvement Loans Receivable [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	39,587	37,052
Home Equity Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	163,209	165,240
Unsecured Debt [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	4,043	3,479
Other Consumer Loans [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial/Consumer, Total	$ 1,254	$ 2,497

Loans - Additional Information

Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
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, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	$ 3,016,771	$ 2,841,473
Net loans	2,998,951	2,825,079
Interest Due	9,793	9,226
Deferred Fees / (Costs)	(3,439)	(6,293)
Recorded Investment	3,023,125	2,844,406
Recorded Investment	3,005,305	2,828,012
Allowance for loan losses	(17,820)	(16,394)	$ (14,837)	$ (14,534)
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	1,725,369	1,675,595
Interest Due	5,596	5,401
Deferred Fees / (Costs)	(3,779)	(5,661)
Recorded Investment	1,727,186	1,675,335
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	744,286	706,622
Interest Due	2,383	2,295
Deferred Fees / (Costs)	(2,025)	(2,375)
Recorded Investment	744,644	706,542
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	547,116	459,256
Interest Due	1,814	1,530
Deferred Fees / (Costs)	2,365	1,743
Recorded Investment	551,295	462,529
Owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	561,463	576,022
Interest Due	1,240	1,511
Deferred Fees / (Costs)	(1,629)	(1,917)
Recorded Investment	561,074	575,616
Non Owner Occupied Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	717,814	683,901
Interest Due	1,063	1,138
Deferred Fees / (Costs)	(1,839)	(2,478)
Recorded Investment	717,038	682,561
Residential Spec Homes [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	5,199	16,591
Interest Due	13	63
Deferred Fees / (Costs)	(2)	(80)
Recorded Investment	5,210	16,574
Development & Spec Land [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	46,547	49,996
Interest Due	131	117
Deferred Fees / (Costs)	(12)	(579)
Recorded Investment	46,666	49,534
Commercial and Industrial [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	394,346	349,085
Interest Due	3,149	2,572
Deferred Fees / (Costs)	(297)	(607)
Recorded Investment	397,198	351,050
Residential Mortgage [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	646,136	596,087
Interest Due	1,861	1,776
Deferred Fees / (Costs)	(2,025)	(2,375)
Recorded Investment	645,972	595,488
Residential Construction [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	24,030	16,027
Interest Due	42	39
Recorded Investment	24,072	16,066
Mortgage Warehousing [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	74,120	94,508
Interest Due	480	480
Recorded Investment	74,600	94,988
Direct Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	38,173	36,737
Interest Due	103	113
Deferred Fees / (Costs)	566	552
Recorded Investment	38,842	37,402
Indirect Installment [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	314,177	227,659
Interest Due	738	528
Deferred Fees / (Costs)		(168)
Recorded Investment	314,915	228,019
Home Equity Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance	194,766	194,860
Interest Due	973	889
Deferred Fees / (Costs)	1,799	1,359
Recorded Investment	$ 197,538	$ 197,108

Accounting for Certain Loans _3

Accounting for Certain Loans Acquired in a Transfer - Amounts of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	$ 3,013,332	$ 2,835,180
Allowance for loan losses	17,820	16,394	$ 14,837	$ 14,534
Carrying Amount	2,998,951	2,825,079
Loans Purchased With Evidence of Credit Deterioration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	15,162	29,863
Allowance for loan losses	60
Carrying Amount	15,102	29,863
Loans Purchased With Evidence of Credit Deterioration [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	13,245	27,198
Loans Purchased With Evidence of Credit Deterioration [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,890	2,632
Loans Purchased With Evidence of Credit Deterioration [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	27	33
Loans Purchased With Evidence of Credit Deterioration [Member] | Heartland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	407	619
Carrying Amount	407	619
Loans Purchased With Evidence of Credit Deterioration [Member] | Heartland [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	232	390
Loans Purchased With Evidence of Credit Deterioration [Member] | Heartland [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	175	229
Loans Purchased With Evidence of Credit Deterioration [Member] | Summit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	878	4,523
Carrying Amount	878	4,523
Loans Purchased With Evidence of Credit Deterioration [Member] | Summit [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	323	3,653
Loans Purchased With Evidence of Credit Deterioration [Member] | Summit [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	555	870
Loans Purchased With Evidence of Credit Deterioration [Member] | Peoples Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	328	441
Carrying Amount	328	441
Loans Purchased With Evidence of Credit Deterioration [Member] | Peoples Bancorp Inc [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	270	315
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	58	126
Loans Purchased With Evidence of Credit Deterioration [Member] | Kosciusko Financial Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	901	1,241
Carrying Amount	901	1,241
Loans Purchased With Evidence of Credit Deterioration [Member] | Kosciusko Financial Inc [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	746	838
Loans Purchased With Evidence of Credit Deterioration [Member] | Kosciusko Financial Inc [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	155	403
Loans Purchased With Evidence of Credit Deterioration [Member] | LaPorte Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,727	2,071
Allowance for loan losses	60
Carrying Amount	1,667	2,071
Loans Purchased With Evidence of Credit Deterioration [Member] | LaPorte Bancorp Inc [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	753	1,034
Loans Purchased With Evidence of Credit Deterioration [Member] | LaPorte Bancorp Inc [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	947	1,004
Loans Purchased With Evidence of Credit Deterioration [Member] | LaPorte Bancorp Inc [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	27	33
Loans Purchased With Evidence of Credit Deterioration [Member] | Lafayette Community Bancorp [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	3,080	4,271
Allowance for loan losses	0
Carrying Amount	3,080	4,271
Loans Purchased With Evidence of Credit Deterioration [Member] | Lafayette Community Bancorp [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	3,080	4,271
Loans Purchased With Evidence of Credit Deterioration [Member] | Wolverine Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	7,841	16,697
Carrying Amount	7,841	16,697
Loans Purchased With Evidence of Credit Deterioration [Member] | Wolverine Bancorp Inc [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	$ 7,841	$ 16,697

Accounting for Certain Loans _4

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, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 5,165	$ 3,457
Additions	0	3,200
Accretion	(1,448)	(1,176)
Reclassification from nonaccretable difference	0	0
Disposals	(1,065)	(316)
Ending balance	2,652	5,165
Heartland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	452	557
Additions	0	0
Accretion	(85)	(99)
Reclassification from nonaccretable difference	0	0
Disposals	(193)	(6)
Ending balance	174	452
Summit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	147	502
Additions	0	0
Accretion	(54)	(353)
Reclassification from nonaccretable difference	0	0
Disposals	(51)	(2)
Ending balance	42	147
Peoples Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	0	389
Additions		0
Accretion		(388)
Reclassification from nonaccretable difference		0
Disposals		(1)
Ending balance		0
Kosciusko Financial Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	386	530
Additions	0	0
Accretion	(78)	(101)
Reclassification from nonaccretable difference	0	0
Disposals	(8)	(43)
Ending balance	300	386
LaPorte Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	980	1,479
Additions	0	0
Accretion	(144)	(235)
Reclassification from nonaccretable difference	0	0
Disposals	(7)	(264)
Ending balance	829	980
Lafayette Community Bancorp [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	933	0
Additions	0	933
Accretion	(275)	0
Reclassification from nonaccretable difference	0	0
Disposals	(49)	0
Ending balance	609	933
Wolverine Bancorp Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	2,267	0
Additions	0	2,267
Accretion	(812)	0
Reclassification from nonaccretable difference	0	0
Disposals	(757)	0
Ending balance	$ 698	$ 2,267

Accounting for Certain Loans _5

Accounting for Certain Loans Acquired in a Transfer - Additional Information (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Total provision charged to operating expense	$ 528,000	$ 1,176,000	$ 635,000	$ 567,000	$ 1,100,000	$ 710,000	$ 330,000	$ 330,000	$ 2,906,000	$ 2,470,000	$ 1,842,000
Loans Purchased With Evidence of Credit Deterioration [Member]
Business Acquisition [Line Items]
Total provision charged to operating expense									60,000	0
Allowances for loan losses									$ 0	$ 0

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period				$ 16,394				$ 14,837	$ 16,394	$ 14,837	$ 14,534
Total loans charged-off									2,552	2,253	2,660
Total loan recoveries									1,072	1,340	1,121
Net loans charged-off									1,480	913	1,539
Total provision charged to operating expense	$ 528	$ 1,176	$ 635	$ 567	$ 1,100	$ 710	$ 330	$ 330	2,906	2,470	1,842
Balance at the end of the period	$ 17,820				$ 16,394				17,820	16,394	14,837
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									473	629	758
Total loan recoveries									176	298	210
Total provision charged to operating expense									1,699	2,164	(68)
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									112	68	181
Total loan recoveries									59	9	31
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off										20	471
Total loan recoveries									29	32	55
Commercial [Member] | Residential Spec Homes [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loan recoveries									8	8	8
Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off										1
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									361	540	106
Total loan recoveries									80	249	116
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									76	89	213
Total loan recoveries									27	44	97
Total provision charged to operating expense									(487)	(81)	(23)
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									76	89	213
Total loan recoveries									27	44	97
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									2,003	1,535	1,689
Total loan recoveries									869	998	814
Total provision charged to operating expense									1,694	387	1,933
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									154	137	329
Total loan recoveries									53	501	81
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									1,673	1,193	1,051
Total loan recoveries									505	497	529
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans charged-off									176	$ 205	309
Total loan recoveries									$ 311		$ 204

Allowance for Loan Losses - A_2

Allowance for Loan Losses - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Total ending allowance balance	$ 17,820	$ 16,394	$ 14,837	$ 14,534
Total ending loans balance	6,708	7,187	$ 2,250
Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total ending allowance balance	60
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Individually evaluated for impairment	1,035	184
Allowance For Loan Losses, Collectively evaluated for impairment	16,785	16,210
Total ending allowance balance	17,820	16,394
Allowance for Loan Losses [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality		0
Commercial [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Individually evaluated for impairment	1,035	184
Allowance For Loan Losses, Collectively evaluated for impairment	9,460	8,909
Total ending allowance balance	10,495	9,093
Commercial [Member] | Allowance for Loan Losses [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality		0
Real Estate [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	1,676	2,188
Total ending allowance balance	1,676	2,188
Real Estate [Member] | Allowance for Loan Losses [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality		0
Consumer [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	4,643	4,083
Total ending allowance balance	4,643	4,083
Consumer [Member] | Allowance for Loan Losses [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality		0
Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Individually evaluated for impairment	6,708	7,187
Loans: Collectively evaluated for impairment	3,010,063	2,834,286
Total ending loans balance	3,016,771	2,841,473
Loans [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	0	0
Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Individually evaluated for impairment	6,708	7,187
Loans: Collectively evaluated for impairment	1,718,661	1,668,408
Total ending loans balance	1,725,369	1,675,595
Loans [Member] | Commercial [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	0	0
Loans [Member] | Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	670,166	612,114
Total ending loans balance	670,166	612,114
Loans [Member] | Real Estate [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	0	0
Loans [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	547,116	459,256
Total ending loans balance	547,116	459,256
Loans [Member] | Consumer [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	0	0
Mortgage Warehousing [Member] | Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Collectively evaluated for impairment	1,006	1,030
Total ending allowance balance	1,006	1,030
Mortgage Warehousing [Member] | Allowance for Loan Losses [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance For Loan Losses, Loans acquired with deteriorated credit quality		0
Mortgage Warehousing [Member] | Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans: Collectively evaluated for impairment	74,120	94,508
Total ending loans balance	74,120	94,508
Mortgage Warehousing [Member] | Loans [Member] | Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	$ 0	$ 0

Non-performing Assets and Imp_3

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, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 11,548	$ 13,276
Loans Past Due Over 90 Days Still Accruing	568	167
Non-Performing TDRs	1,057	1,013
Performing TDRs	2,002	1,958
Total Non-Performing Loans	15,175	16,414
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	6,094	6,902
Loans Past Due Over 90 Days Still Accruing	208
Non-Performing TDRs	492	451
Performing TDRs	109	1
Total Non-Performing Loans	6,903	7,354
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	3,413	4,877
Non-Performing TDRs		11
Performing TDRs	109	1
Total Non-Performing Loans	3,522	4,889
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	554	115
Non-Performing TDRs	492	440
Total Non-Performing Loans	1,046	555
Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	68	176
Total Non-Performing Loans	68	176
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,059	1,734
Loans Past Due Over 90 Days Still Accruing	208
Total Non-Performing Loans	2,267	1,734
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,846	3,693
Loans Past Due Over 90 Days Still Accruing	180
Non-Performing TDRs	423	351
Performing TDRs	1,558	1,672
Total Non-Performing Loans	5,007	5,716
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,846	3,693
Loans Past Due Over 90 Days Still Accruing	180
Non-Performing TDRs	423	351
Performing TDRs	1,558	1,450
Total Non-Performing Loans	5,007	5,494
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Performing TDRs		222
Total Non-Performing Loans		222
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,608	2,681
Loans Past Due Over 90 Days Still Accruing	180	167
Non-Performing TDRs	142	211
Performing TDRs	335	285
Total Non-Performing Loans	3,265	3,344
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	35	160
Total Non-Performing Loans	35	160
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	916	1,041
Loans Past Due Over 90 Days Still Accruing	173	167
Total Non-Performing Loans	1,089	1,208
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,657	1,480
Loans Past Due Over 90 Days Still Accruing	7
Non-Performing TDRs	142	211
Performing TDRs	335	285
Total Non-Performing Loans	$ 2,141	$ 1,976

Non-performing Assets and Imp_4

Non-performing Assets and Impaired Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)ConsecutivePaymentContract	Dec. 31, 2017USD ($)
Financing Receivable, Modifications [Line Items]
Non-accrual loans	$ 11,548,000	$ 13,276,000
Non-performing TDRs	$ 1,100,000
Loan delinquency period	90 days
Minimum period required for satisfactory performance to return loan from non-accrual to accrual status	6 months
Restructured loan reported in TDRs	$ 3,100,000
Restructured loan returned to accruing status number of Consecutive Payments of loan | ConsecutivePayment	6
Specific reserves allocated to troubled debt restructuring	$ 20,000
Number TDRs returned to accrual status | Contract	2
Performing Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Restructured loan reported in TDRs	$ 2,000,000
Loans Purchased With Evidence of Credit Deterioration [Member]
Financing Receivable, Modifications [Line Items]
Non-accrual loans	3,600,000
Non-performing TDRs	$ 0
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
Loans classified as TDR after a period	90 days
Minimum [Member] | 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] | Satisfactory Pass [Member]
Financing Receivable, Modifications [Line Items]
Number of consecutive years of profit for Good Pass Rating	3 years
Maximum [Member]
Financing Receivable, Modifications [Line Items]
Loans with an aggregate credit exposure	$ 3,500,000
Loans classified as TDR after a period	120 days
Minimum number of years of Satisfactory Repayment required for Satisfactory Pass Rating	2 years

Non-performing Assets and Imp_5

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance total	$ 6,696	$ 7,141	$ 2,250
Total ending loans balance	6,708	7,187	2,250
Allowance For Loan Loss Allocated	1,035	184	4
Average Balance in Impaired Loans total	7,368	3,774	2,905
Cash/Accrual Interest Income Recognized, Total	128	86	95
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	4,968	6,210	2,219
Recorded Investment With no recorded allowance	4,980	6,256	2,218
Average Balance in Impaired Loans With no recorded allowance	5,454	3,696	2,900
Cash/Accrual Interest Income Recognized, With no recorded allowance	110	40	93
Unpaid Principal Balance With an allowance recorded	1,728	931	31
Recorded Investment With an allowance recorded	1,728	931	32
Allowance For Loan Loss Allocated	1,035	184	4
Average Balance in Impaired Loans With an allowance recorded	1,914	78	5
Cash/Accrual Interest Income Recognized, With an allowance recorded	18	46	2
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	2,696	3,824	1,533
Recorded Investment With no recorded allowance	2,689	3,849	1,533
Average Balance in Impaired Loans With no recorded allowance	3,048	1,673	1,619
Cash/Accrual Interest Income Recognized, With no recorded allowance	71	11	58
Unpaid Principal Balance With an allowance recorded	827	931
Recorded Investment With an allowance recorded	828	931
Allowance For Loan Loss Allocated	145	184
Average Balance in Impaired Loans With an allowance recorded	864	78
Cash/Accrual Interest Income Recognized, With an allowance recorded		46
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	860	554	440
Recorded Investment With no recorded allowance	888	570	440
Average Balance in Impaired Loans With no recorded allowance	1,096	345	871
Cash/Accrual Interest Income Recognized, With no recorded allowance	12		18
Unpaid Principal Balance With an allowance recorded	186
Recorded Investment With an allowance recorded	186
Allowance For Loan Loss Allocated	30
Average Balance in Impaired Loans With an allowance recorded	180
Cash/Accrual Interest Income Recognized, With an allowance recorded	4
Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	68	176	118
Recorded Investment With no recorded allowance	66	174	118
Average Balance in Impaired Loans With no recorded allowance	71	233	61
Cash/Accrual Interest Income Recognized, With no recorded allowance		4	16
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance With no recorded allowance	1,344	1,656	128
Recorded Investment With no recorded allowance	1,337	1,663	127
Average Balance in Impaired Loans With no recorded allowance	1,239	1,445	349
Cash/Accrual Interest Income Recognized, With no recorded allowance	27	25	1
Unpaid Principal Balance With an allowance recorded	715		31
Recorded Investment With an allowance recorded	714		32
Allowance For Loan Loss Allocated	860		4
Average Balance in Impaired Loans With an allowance recorded	870	$ 0	5
Cash/Accrual Interest Income Recognized, With an allowance recorded	$ 14		$ 2

Non-performing Assets and Imp_6

Non-performing Assets and Impaired Loans - Payment Status by Class of Loan (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,998,940	$ 2,817,688
Total Past Due	12,605	14,289
Loans Not Past Due	17,831	23,785
Total	$ 3,016,771	$ 2,841,473
Total Past Due, Percentage of Total Loans	0.42%	0.50%
Loans Not Past Due, Percentage of Total Loans	0.59%	0.84%
Current,Percentage of total loans	99.41%	99.16%
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,715,104	$ 1,663,493
Total Past Due	6,586	7,353
Loans Not Past Due	10,265	12,102
Total	1,725,369	1,675,595
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	556,516	567,571
Total Past Due	3,413	4,888
Loans Not Past Due	4,947	8,451
Total	561,463	576,022
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	716,574	682,712
Total Past Due	1,046	555
Loans Not Past Due	1,240	1,189
Total	717,814	683,901
Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,707	16,591
Loans Not Past Due	492
Total	5,199	16,591
Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	46,479	49,789
Total Past Due	68	176
Loans Not Past Due	68	207
Total	46,547	49,996
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	390,828	346,830
Total Past Due	2,059	1,734
Loans Not Past Due	3,518	2,255
Total	394,346	349,085
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	739,650	701,218
Total Past Due	3,269	4,044
Loans Not Past Due	4,636	5,404
Total	744,286	706,622
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	641,500	590,746
Total Past Due	3,269	4,044
Loans Not Past Due	4,636	5,341
Total	646,136	596,087
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	24,030	15,964
Loans Not Past Due		63
Total	24,030	16,027
Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	74,120	94,508
Total	74,120	94,508
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	544,186	452,977
Total Past Due	2,750	2,892
Loans Not Past Due	2,930	6,279
Total	547,116	459,256
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,138	36,489
Total Past Due	35	160
Loans Not Past Due	35	248
Total	38,173	36,737
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	313,088	224,348
Total Past Due	916	1,041
Loans Not Past Due	1,089	3,311
Total	314,177	227,659
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	192,960	192,140
Total Past Due	1,799	1,691
Loans Not Past Due	1,806	2,720
Total	194,766	194,860
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 5,100	$ 6,426
Total Past Due, Percentage of Total Loans	0.17%	0.23%
30 - 59 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1,719	$ 2,676
30 - 59 Days Past Due [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	537	1,613
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	175	512
30 - 59 Days Past Due [Member] | Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	492
30 - 59 Days Past Due [Member] | Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		31
30 - 59 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	515	520
30 - 59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,131	1,311
30 - 59 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,131	1,248
30 - 59 Days Past Due [Member] | Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		63
30 - 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,250	2,439
30 - 59 Days Past Due [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	93	78
30 - 59 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,396	1,859
30 - 59 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	761	502
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,061	$ 2,903
Total Past Due, Percentage of Total Loans	0.07%	0.10%
60 - 89 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1,752	$ 2,073
60 - 89 Days Past Due [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	997	1,950
60 - 89 Days Past Due [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	19	122
60 - 89 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	736	1
60 - 89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	56	49
60 - 89 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	56	49
60 - 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	253	781
60 - 89 Days Past Due [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18	10
60 - 89 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	198	244
60 - 89 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	37	527
Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 568	$ 167
Total Past Due, Percentage of Total Loans	0.02%	0.01%
Greater than 90 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 208
Greater than 90 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	208
Greater than 90 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	180
Greater than 90 Days Past Due [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	180
Greater than 90 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	180	$ 167
Greater than 90 Days Past Due [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	173	$ 167
Greater than 90 Days Past Due [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 7

Non-performing Assets and Imp_7

Non-performing Assets and Impaired Loans - Loans by Credit Grades (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total	$ 3,016,771	$ 2,841,473
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,725,369	1,675,595
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	561,463	576,022
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	717,814	683,901
Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,199	16,591
Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	46,547	49,996
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	394,346	349,085
Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	744,286	706,622
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	646,136	596,087
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	24,030	16,027
Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	74,120	94,508
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	547,116	459,256
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	38,173	36,737
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	314,177	227,659
Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	194,766	194,860
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,954,944	$ 2,774,491
Percentage of total loans	97.95%	97.64%
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,671,634	$ 1,617,673
Pass [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	538,177	549,198
Pass [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	702,269	675,030
Pass [Member] | Commercial [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,199	16,591
Pass [Member] | Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	46,382	48,884
Pass [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	379,607	327,970
Pass [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	739,459	700,906
Pass [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	641,309	590,593
Pass [Member] | Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	24,030	15,805
Pass [Member] | Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	74,120	94,508
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	543,851	455,912
Pass [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	38,138	36,577
Pass [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	313,088	226,451
Pass [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	192,625	192,884
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 23,052	$ 20,820
Percentage of total loans	0.76%	0.73%
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 23,052	$ 20,820
Special Mention [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,618	8,622
Special Mention [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	9,682	3,864
Special Mention [Member] | Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	97	886
Special Mention [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,655	7,448
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 38,775	$ 46,162
Percentage of total loans	1.29%	1.62%
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 30,683	$ 37,102
Substandard [Member] | Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	16,668	18,202
Substandard [Member] | Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,863	5,007
Substandard [Member] | Commercial [Member] | Development & Spec Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	68	226
Substandard [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	8,084	13,667
Substandard [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,827	5,716
Substandard [Member] | Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,827	5,494
Substandard [Member] | Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		222
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,265	3,344
Substandard [Member] | Consumer [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	35	160
Substandard [Member] | Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,089	1,208
Substandard [Member] | Consumer [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,141	$ 1,976
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, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total cost	$ 115,790	$ 112,368
Accumulated depreciation	(41,459)	(36,839)
Net premise and equipment	74,331	75,529
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	21,604	21,633
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	69,590	68,447
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 24,596	$ 22,288

Loan Servicing - Additional Inf

Loan Servicing - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2016
Receivables [Abstract]
Unpaid principal balances of loans serviced for others totaled	$ 1,299,000	$ 1,310,000
Aggregate fair value of capitalized mortgage servicing rights	13,900	12,800	$ 12,100	$ 8,900
Mortgage servicing rights, net	12,349	11,602	11,174
Bank recorded additional impairment	$ (60)	$ 80	$ 110

Loan Servicing - Originated Mor

Loan Servicing - Originated Mortgage Servicing Rights (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Payments for (Proceeds from) Mortgage Servicing Rights [Abstract]
Balances, January 1	$ 12,189	$ 11,681	$ 9,271
Servicing rights capitalized	1,883	2,109	3,426
Amortization of servicing rights	(1,196)	(1,601)	(1,016)
Balances, December 31	12,876	12,189	11,681
Balances, January 1	(587)	(507)	(397)
Additions	(78)	(85)	(236)
Reductions	138	5	126
Balances, December 31	(527)	(587)	(507)
Mortgage servicing rights, net	$ 12,349	$ 11,602	$ 11,174

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	Oct. 17, 2017	Sep. 01, 2017	Nov. 07, 2016	Jul. 18, 2016	Jun. 01, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Goodwill acquired							$ 42,939,000
Goodwill impairment loss						$ 0	0
Amortization expense for intangible assets totaled						$ 2,000,000	1,500,000	$ 1,200,000
Peoples Bancorp Inc [Member]
Intangible Assets [Line Items]
Core deposit intangible amortization period								10 years
Central National Bank & Trust [Member]
Intangible Assets [Line Items]
Goodwill acquired			$ 609,000
Core deposit intangible amortization period								10 years
LaPorte Bancorp Inc [Member]
Intangible Assets [Line Items]
Goodwill acquired				$ 21,000,000
Core deposit intangible amortization period								10 years
Goodwill measurement period adjustment							$ 704,000
Kosciusko Financial Inc [Member]
Intangible Assets [Line Items]
Goodwill acquired					$ 6,400,000
Core deposit intangible amortization period						10 years
Wolverine Bancorp Inc [Member]
Intangible Assets [Line Items]
Goodwill acquired	$ 26,800,000
Core deposit intangible amortization period						10 years
Lafayette Community Bancorp [Member]
Intangible Assets [Line Items]
Goodwill acquired		$ 15,400,000
Core deposit intangible amortization period						10 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 Asset_3

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, January 1	$ 76,941
Goodwill acquired	42,939
Balance, December 31	$ 119,880

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets Core deposit intangible, Gross Carrying Amount	$ 10,400
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets Core deposit intangible, Gross Carrying Amount	20,711	$ 20,711
Amortizable intangible assets Core deposit intangible, Accumulated Amortization	$ (10,321)	$ (8,309)

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Estimated Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,019	$ 1,787
2,020	1,481
2,021	1,394
2,022	1,375
2,023	1,281
Thereafter	3,072
Estimated amortization	$ 10,390	$ 12,402

Deposits - Deposits (Detail)

Deposits - Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposits [Line Items]
Noninterest-bearing demand deposits	$ 642,129	$ 601,805
Interest-bearing demand deposits	864,026	909,638
Money market (variable rate)	420,123	378,108
Savings deposits	400,187	424,500
Other certificates and time deposits	441,087	436,367
Total deposits	3,139,376	2,881,003
Certificates of Deposit of $250,000 or More [Member]
Deposits [Line Items]
Certificates of deposit	$ 371,824	$ 130,585

Deposits - Certificates and Oth

Deposits - Certificates and Other Time Deposits for Both Retail and Brokered (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Time Deposits By Maturity [Line Items]
2,019	$ 525,947
2,020	137,474
2,021	68,957
2,022	31,285
2,023	30,750
Thereafter	18,498
Certificates and other time deposits	812,911
Retail [Member]
Time Deposits By Maturity [Line Items]
2,019	498,382
2,020	112,944
2,021	48,422
2,022	16,029
2,023	14,052
Thereafter	18,498
Certificates and other time deposits	708,327
Brokered [Member]
Time Deposits By Maturity [Line Items]
2,019	27,565
2,020	24,530
2,021	20,535
2,022	15,256
2,023	16,698
Certificates and other time deposits	$ 104,584

Borrowings - Borrowings (Detail

Borrowings - Borrowings (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Federal Home Loan Bank advances, variable and fixed rates ranging from 1.51% to 7.53%, due at various dates through November 15, 2024	$ 356,579	$ 336,308
Securities sold under agreements to repurchase	52,116	61,097
Federal Reserve Bank discount window		11,000
Federal funds purchased	141,689	143,252
Notes payable, variable rate of 2.75%, due at various dates through July 13, 2019		12,500
Total borrowings	$ 550,384	$ 564,157

Borrowings - Borrowings (Parent

Borrowings - Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018
Borrowings Under Repurchase Agreements [Line Items]
Notes payable, variable rate	2.75%
Notes payable, due date	Jul. 13, 2019
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	1.51%

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) $ in Millions	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
Federal Home Loan Bank advances are secured by first and second mortgage loans and mortgage warehouse loans	$ 634
Available credit lines with various money center banks	$ 340.3

Borrowings - Contractual Maturi

Borrowings - Contractual Maturities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 485,557
2,020	37,472
2,021	5,042
2,022	12,154
2,023	114
Thereafter	10,045
Total borrowings	$ 550,384	$ 564,157

Repurchase Agreements - Summary

Repurchase Agreements - Summary of Repurchase Agreements Accounted as Secured Borrowings (Detail)	Dec. 31, 2018USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 52,116
Securities pledged for Repurchase Agreements, Total	58,808
Federal Agency Collateralized Mortgage Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged for Repurchase Agreements, Total	31,454
Federal Agency Mortgage-backed Pools [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged for Repurchase Agreements, Total	27,354
Remaining Contractual Maturity of the Agreements, Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	52,116
Securities pledged for Repurchase Agreements, Total	58,808
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 pledged for Repurchase Agreements, Total	31,454
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 pledged for Repurchase Agreements, Total	$ 27,354

Repurchase Agreements - Additio

Repurchase Agreements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Repurchase Agreements [Abstract]
Maximum amount of outstanding agreements	$ 61.4	$ 63.1
Daily average amount of outstanding agreements	$ 51.4	$ 55.2

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. 30, 2004	Jun. 30, 2003	Dec. 31, 2018	Dec. 31, 2017
Subordinate Debenture [Line Items]
Junior subordinated debentures and the securities variable rate						2.75%
LIBOR period						3 months
Junior subordinated debentures maturity date						Jul. 13, 2019
Carrying value of securities, net of remaining purchase discount						$ 37,837,000	$ 37,653,000
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						4.75%
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						4.45%
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						5.45%
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						5.65%
Junior subordinated debentures maturity date						Mar. 1, 2034
Carrying value of securities, net of remaining purchase discount						$ 3,400,000
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						4.47%
Junior subordinated debentures maturity date						Dec. 1, 2036
Carrying value of securities, net of remaining purchase discount						$ 1,900,000
City Savings Trust [Member]
Subordinate Debenture [Line Items]
Trust Preferred Capital Securities Sold					$ 5,000,000
Securities bearing interest rate						90-day LIBOR plus 3.10%
Junior subordinated debentures and the securities variable rate					3.10%
LIBOR period						90 days
Interest rate on junior subordinated debentures and securities						5.90%
Junior subordinated debentures maturity date						Jun. 1, 2033
Carrying value of securities, net of remaining purchase discount						$ 4,400,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Eligible compensation for ESOP	$ 265,000
Cash contributions and expense recorded for the ESOP	$ 750,000	$ 600,000	$ 550,000
Employee stock ownership plan outstanding shares	1,376,821
Percentage of outstanding shares	3.60%

Employee Thrift and Defined B_2

Employee Thrift and Defined Benefit Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Thrift Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Bank's expense related to the thrift plan	$ 1,200,000	$ 942,000	$ 785,000
Thrift Plan owns outstanding shares	742,250
Percentage of outstanding shares owns with thrift plan	1.90%
Pentegra Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Bank's expense related to the thrift plan	$ 0	$ 0
Pentegra Plan date	Aug. 1, 2007
Employer identification number	135,645,888
Plan number	333
Withdrawal liability	$ 3,200,000

Income Tax - Reconciliation of

Income Tax - Reconciliation of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Currently payable
Federal	$ 9,166	$ 12,079	$ 7,467
Deferred
Federal	1,277	331	1,334
Revaluation of deferred tax assets		2,426
Total income tax expense	10,443	14,836	8,801
Reconciliation of federal statutory to actual tax expense
Federal statutory income tax at 21% in 2018 and 35% in 2017 and 2016	13,348	16,783	11,450
Tax exempt interest	(1,982)	(2,699)	(1,882)
Tax exempt income	(448)	(638)	(575)
Stock compensation	(384)	(546)
Revaluation of deferred tax assets		2,426
Other tax exempt income	(260)	(456)	(608)
Nondeductible and other	169	(34)	416
Total income tax expense	$ 10,443	$ 14,836	$ 8,801

Income Tax - Reconciliation o_2

Income Tax - Reconciliation of Income Taxes (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	35.00%	35.00%

Income Tax - Reconciliation o_3

Income Tax - Reconciliation of Deferred Tax Assets & Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Allowance for loan losses	$ 3,831	$ 3,396
Net operating loss and tax credits (from acquisitions)	1,038	1,658
Director and employee benefits	2,392	2,276
Unrealized loss on AFS securities and fair value hedge	2,165	1,147
Accrued Pension	801	852
Fair value adjustment on acquisitions		1,087
Other	670	1,083
Total assets	10,897	11,499
Liabilities
Depreciation	(1,850)	(1,680)
State tax	(137)	(210)
Federal Home Loan Bank stock dividends	(330)	(339)
Difference in basis of intangible assets	(2,919)	(2,831)
Fair value adjustment on acquisitions	(62)
Other	(119)	(125)
Total liabilities	(5,417)	(5,185)
Valuation allowance	(1,038)	(1,613)
Net deferred tax asset	$ 4,442	$ 4,701

Income Tax - Additional Informa

Income Tax - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
U.S. federal corporate tax rate		21.00%	35.00%	35.00%
Previously acquired institutions amount of allocated income to bad debt deductions		$ 12,800,000
Unrecorded deferred income tax liability		$ 2,700,000
Bad debt reserve, description		Retained earnings of the Bank include approximately $12.8 million for which no deferred income tax liability has been recognized. This amount represents an allocation of previously acquired institutions income to bad debt deductions as of December 31, 1987 for tax purposes only. Reductions of amounts so allocated for purposes other than tax bad debt losses including redemption of bank stock or excess dividends, or loss of “bank” status would create income for tax purposes only, which would be subject to the then-current corporate income tax rate.
Scenario, Forecast [Member]
Income Taxes [Line Items]
U.S. federal corporate tax rate	21.00%
State Tax Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forwards		$ 13,900,000
Tax Credit Carryforward, Amount		$ 157,000
Minimum [Member] | Federal Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forward expiration year		2,031

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax effect	$ 2,167	$ 1,914
Total accumulated other comprehensive loss	(8,144)	(3,551)
Unrealized Gain (Loss) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), before tax	(8,561)	(3,937)
Unamortized Gain on Securities Held to Maturity, Previously Transferred from AFS [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), before tax	10	200
Unrealized Loss on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), before tax	$ (1,760)	$ (1,728)

Commitments, Off-Balance Shee_2

Commitments, Off-Balance Sheet Risk and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments to make loans	$ 873,800,000	$ 802,900,000
Commitments under outstanding standby letters of credit	4,800,000	$ 3,400,000
Anticipated losses from unused commitments	$ 0

Regulatory Capital - Summary of

Regulatory Capital - Summary of Regulatory Capital Requirement (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual, Amount	$ 427,616	$ 384,800
Total capital (to risk-weighted assets), Actual, Ratio	13.39%	12.91%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 255,419	$ 238,543
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 315,283	$ 275,816
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio	9.875%	9.25%
Tier 1 capital (to average assets), Actual, Amount	$ 409,760	$ 368,355
Tier 1 capital (to average assets), Actual, Ratio	12.83%	12.35%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 191,565	$ 178,907
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	6.00%	6.00%
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 251,429	$ 216,180
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio	7.875%	7.25%
Common equity tier 1 capital, Actual Amount	$ 371,297	$ 329,892
Common equity tier 1 capital, Actual Ratio	11.63%	11.06%
Common equity tier 1 capital,For capital adequacy purposes, Amount	$ 143,673	$ 134,181
Common equity tier 1 capital, For capital adequacy purpose, Ratio	4.50%	4.50%
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 203,537	$ 171,454
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio	6.375%	5.75%
Tier 1 capital (to average assets), Actual, Amount	$ 409,760	$ 368,355
Tier 1 capital (to average assets), Actual, Ratio	10.12%	9.92%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 162,033	$ 148,503
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	4.00%	4.00%
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 162,033	$ 148,503
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio	4.00%	4.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual, Amount	$ 396,755	$ 382,788
Total capital (to risk-weighted assets), Actual, Ratio	12.43%	12.85%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 255,419	$ 238,386
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 315,283	$ 275,634
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio	9.875%	9.25%
Total capital (to risk-weighted assets), For well capitalized purpose, Amount	$ 319,274	$ 297,982
Total capital (to risk-weighted assets), For well capitalized purpose, Ratio	10.00%	10.00%
Tier 1 capital (to average assets), Actual, Amount	$ 378,899	$ 366,343
Tier 1 capital (to average assets), Actual, Ratio	11.87%	12.29%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 191,565	$ 178,790
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	6.00%	6.00%
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 251,429	$ 216,038
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio	7.875%	7.25%
Tier 1 capital (to average assets), For well capitalized purpose, Amount	$ 255,420	$ 238,386
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	8.00%	8.00%
Common equity tier 1 capital, Actual Amount	$ 378,899	$ 366,343
Common equity tier 1 capital, Actual Ratio	11.87%	12.29%
Common equity tier 1 capital,For capital adequacy purposes, Amount	$ 143,674	$ 134,092
Common equity tier 1 capital, For capital adequacy purpose, Ratio	4.50%	4.50%
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 203,537	$ 171,340
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio	6.375%	5.75%
Common equity tier 1 capital, For well capitalized purpose, Amount	$ 207,528	$ 193,689
Common equity tier 1 capital, For well capitalized purposes, Ratio	6.50%	6.50%
Tier 1 capital (to average assets), Actual, Amount	$ 378,899	$ 366,343
Tier 1 capital (to average assets), Actual, Ratio	9.34%	9.89%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 162,327	$ 148,116
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio	4.00%	4.00%
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount	$ 162,327	$ 148,116
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio	4.00%	4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount	$ 202,908	$ 185,145
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	5.00%	5.00%

Regulatory Capital - Additional

Regulatory Capital - Additional Information (Detail)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2015
Schedule Of Regulatory Assets And Liabilities [Line Items]
Capital conservation buffer		1.875%	0.00%
Scenario, Forecast [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Capital conservation buffer	2.50%

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	Nov. 14, 2016	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / shares	Dec. 31, 2016USD ($)$ / shares
Stock Based Compensation [Line Items]
Stock split ratio	1.5
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		$ 4,246,688,000	$ 3,964,303,000
Tax benefit associated with compensation expense		53,000	114,000	$ 113,000
Total compensation cost		251,000	325,000	324,000
Total compensation cost		626,000	460,000	608,000
Cash received from option exercise		493,000	1,600,000	214,000
Actual tax benefit realized for the tax deductions		213,000	$ 522,000	$ 158,000
Unrecognized compensation cost		$ 1,500,000
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 | shares		1,556,325
Number of shares available incentive stock options | shares		225,000
Non-option awards granted | shares		900,000
Weighted average grant-date fair value of options granted | $ / shares		$ 5.54	$ 4.83	$ 2.59
Option Activity Under the 2003 Plan [Member]
Stock Based Compensation [Line Items]
Maximum common shares issued under the plan | shares		759,375
Number of shares available incentive stock options | shares		759,375
Non-option awards granted | shares		379,687
Additional common shares available for issuance | shares		885,937
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
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
Restricted and Performance Shares [Member]
Stock Based Compensation [Line Items]
Tax benefit associated with compensation expense		79,000	$ 47,000	$ 99,000
Total compensation cost		251,000	325,000	324,000
Total compensation cost		$ 376,000	$ 135,000	$ 284,000

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, 2018USD ($)$ / sharesshares
Schedule Of Stock Option Activity [Line Items]
Option Outstanding, Shares, Beginning balance | shares	41,175
Option Exercised, Shares | shares	(19,875)
Option Outstanding, Shares, Ending balance | shares	21,300
Option Exercisable, Shares, Ending balance | shares	21,300
Option Outstanding, Weighted Average Exercise Price, Beginning balance | $ / shares	$ 4.91
Option Exercised, Weighted Average Exercise Price | $ / shares	4.80
Option Outstanding, Weighted Average Exercise Price, Ending balance | $ / shares	5.03
Option Exercisable, Weighted Average Exercise Price, Ending balance | $ / shares	$ 5.03
Option Outstanding, Weighted Average Remaining Contractual Term	1 year 9 months 7 days
Option Exercisable, Weighted Average Remaining Contractual Term	1 year 9 months 7 days
Option Outstanding, Aggregate Intrinsic Value | $	$ 229,004
Option Exercisable, Aggregate Intrinsic Value | $	$ 229,004

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value of Options Granted (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yields	1.99%	1.75%	2.34%
Volatility factors of expected market price of common stock	28.60%	28.52%	28.60%
Risk-free interest rates	2.85%	2.42%	1.83%
Expected life of options	8 years	8 years	8 years

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Option Activity Under 2013 Plan (Detail) - Option Activity Under the 2013 Plan [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Schedule Of Stock Option Activity [Line Items]
Option Outstanding, Shares, Beginning balance | shares	323,666
Option Granted, Shares | shares	31,122
Option Exercised, Shares | shares	(36,221)
Option Forfeited, Shares | shares	(11,250)
Option Outstanding, Shares, Ending balance | shares	307,317
Option Exercisable, Shares, Ending balance | shares	191,410
Option Outstanding, Weighted Average Exercise Price, Beginning balance | $ / shares	$ 11.50
Option Granted, Weighted Average Exercise Price | $ / shares	19.31
Option Exercised, Weighted Average Exercise Price | $ / shares	10.34
Option Forfeited, Weighted Average Exercise Price | $ / shares	15.60
Option Outstanding, Weighted Average Exercise Price, Ending balance | $ / shares	12.28
Option Exercisable, Weighted Average Exercise Price, Ending balance | $ / shares	$ 10.67
Option Outstanding, Weighted Average Remaining Contractual Term	6 years 10 months 20 days
Option Exercisable, Weighted Average Remaining Contractual Term	6 years 2 months 8 days
Option Outstanding, Aggregate Intrinsic Value | $	$ 1,077,096
Option Exercisable, Aggregate Intrinsic Value | $	$ 977,748

Share-Based Compensation - Su_3

Share-Based Compensation - Summary of Status of Non-vested, Restricted and Performance Shares (Detail) - Restricted and Performance Shares [Member]	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested beginning of year, Shares | shares	144,791
Vested, Shares | shares	(43,519)
Granted, Shares | shares	75,266
Non-vested, end of year, Shares | shares	176,538
Non-vested beginning of year, Weighted Average Grant Date Fair Value | $ / shares	$ 13.32
Vested, Weighted Average Grant Date Fair Value | $ / shares	10.59
Granted, Weighted Average Grant Date Fair Value | $ / shares	20.13
Non-vested end of year, Weighted Average Grant Date Fair Value | $ / shares	$ 16.90

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
LIBOR period	3 months
Weighted average fixed rate	3.76%
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
Interest Rate Swap [Member]
Derivative [Line Items]
LIBOR period	1 month
Weighted average fixed rate	2.81%
LaPorte Bancorp Inc [Member]
Derivative [Line Items]
LIBOR period	1 month
Weighted average fixed rate	2.31%
Cash Flow Hedging [Member]
Derivative [Line Items]
Notional amount of interest	$ 30.5	$ 30.5
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount of interest	50
Cash Flow Hedging [Member] | LaPorte Bancorp Inc [Member]
Derivative [Line Items]
Notional amount of interest	30	30
Derivative in Fair Value Hedging Relationship [Member]
Derivative [Line Items]
Notional amount of interest	$ 209.2	$ 154.6

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 177	$ 954
Total Liability Derivatives	1,802	2,542
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	42	811
Total Liability Derivatives	1,802	2,539
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts One [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	42	811
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	1,760	1,728
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	42	811
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	135	143
Total Liability Derivatives		3
Derivatives Not Designated as Hedging Instruments [Member] | Mortgage Loan Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives		3
Derivatives Not Designated as Hedging Instruments [Member] | Mortgage Loan Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 135	$ 143

Derivative Financial Instrume_5

Derivative Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statements of Income Derivative in Cash Flow Hedging Relationship (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Comprehensive Income on Derivative (Effective Portion)	$ (32)	$ 1,404	$ 9
Cash Flow Hedging [Member] | Interest Rate Contracts One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Comprehensive Income on Derivative (Effective Portion)	$ (25)	$ 913	$ 6

Derivative Financial Instrume_6

Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income Derivative in Fair Value Hedging Relationship (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	$ (852)	$ (817)	$ (1,776)
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	852	817	1,776
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	$ (5)	$ (439)	$ (62)

Disclosures about Fair Value _3

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, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	$ 600,348	$ 509,665
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	16,608	19,052
State and Municipal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	209,303	149,564
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	185,003	130,365
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	178,736	208,657
Corporate Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	10,698	385
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		1,642
Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities, Fair Value	600,348	509,665
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	16,608	19,052
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	209,303	149,564
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	185,003	130,365
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	178,736	208,657
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	10,698	385
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		1,642
Recurring Basis [Member] | Hedged Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	209,161	154,575
Recurring Basis [Member] | Forward Sale Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	135	143
Recurring Basis [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value	(1,801)	(917)
Recurring Basis [Member] | Commitments To Originate Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value		(3)
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	600,348	509,665
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	16,608	19,052
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	209,303	149,564
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	185,003	130,365
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	178,736	208,657
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	10,698	385
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		1,642
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	209,161	154,575
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	135	143
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	$ (1,801)	(917)
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commitments To Originate Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, fair value		$ (3)

Disclosures about Fair Value _4

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	$ (5)	$ (439)	$ (62)
Hedged Loans [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	(852)	(817)	(1,776)
Interest Rate Swap [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	852	817	1,776
Derivative Loan Commitments [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Included in net income	$ (5)	$ (439)	$ (62)

Disclosures about Fair Value _5

Disclosures about Fair Value of Assets and Liabilities - Other Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	$ 5,661	$ 6,957
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	12,349	11,602
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	5,661	6,957
Fair Value, Measurements, Nonrecurring [Member] | Mortgage Servicing Rights [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Impaired loans	12,349	11,602
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	5,661	6,957
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	$ 12,349	$ 11,602

Disclosures about Fair Value _6

Disclosures about Fair Value of Assets and Liabilities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Reduced in carrying amount of mortgage servicing rights	$ 527,000	$ 587,000

Disclosures about Fair Value _7

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) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ConsecutivePayment	Dec. 31, 2017USD ($)ConsecutivePayment
Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	10
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value | $	$ 5,661	$ 6,957
Valuation Technique	Collateral based measurement	Collateral based measurement
Impaired loans	Discount to reflect current market	Discount to reflect current market
Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value | $	$ 12,349	$ 11,602
Valuation Technique	Discounted cash flows	Discounted cash flows
Impaired loans	Discount rate,	Discount rate,
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	0.00%	0.00%
Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	10.2	9.6
Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	9.1	9.2
Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	0.1	0
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	100.00%	46.80%
Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	11	10.8
Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	21.9	27.7
Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	2.8	1.5
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	15.50%	2.60%
Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	10.3	9.7
Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	9.3	10.5
Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable inputs	(0.6)	0.2

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 58,492	$ 59,980
Interest-earning time deposits	15,744	16,461
Investment securities, held to maturity	210,112	200,448
Loans held for sale	1,038	3,094
Loans (excluding loan level hedges), net	3,005,305	2,828,012
Stock in FHLB	18,073	18,105
Interest receivable	14,239	13,059
Liabilities
Non-interest bearing deposits	642,129	601,805
Interest bearing deposits	2,497,247	2,279,198
Borrowings	550,384	564,157
Subordinated debentures	37,837	37,653
Interest payable	2,031	886
Carrying Amount [Member]
Assets
Cash and due from banks	58,492	76,441
Interest-earning time deposits	15,744	16,461
Investment securities, held to maturity	210,112	200,448
Loans held for sale	1,038	3,094
Loans (excluding loan level hedges), net	2,786,351	2,664,211
Stock in FHLB	18,073	18,105
Interest receivable	14,239	13,059
Liabilities
Non-interest bearing deposits	642,129	601,805
Interest bearing deposits	2,497,247	2,279,198
Borrowings	550,384	564,157
Subordinated debentures	37,837	37,653
Interest payable	2,031	886
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Cash and due from banks	58,492	76,441
Liabilities
Non-interest bearing deposits	642,129	601,805
Significant Other Observable Inputs (Level 2) [Member]
Assets
Interest-earning time deposits	15,542	16,632
Investment securities, held to maturity	208,273	201,085
Stock in FHLB	18,073	18,105
Interest receivable	14,239	13,059
Liabilities
Interest bearing deposits	2,377,274	2,156,487
Borrowings	542,311	560,057
Subordinated debentures	35,711	35,994
Interest payable	2,031	886
Significant Unobservable Inputs (Level 3) [Member]
Assets
Loans held for sale	1,038	3,094
Loans (excluding loan level hedges), net	$ 2,681,741	$ 2,589,064

Condensed Financial Informati_3

Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Total cash and cash equivalents	$ 58,492	$ 59,980	$ 53,421	$ 35,322
Other assets	40,467	40,963
Total assets	4,246,688	3,964,303
Liabilities
Borrowings	550,384	564,157
Subordinated debentures	37,837	37,653
Other liabilities	25,068	23,526
Stockholders' Equity	491,992	457,078	340,855	266,832
Total liabilities and stockholders' equity	4,246,688	3,964,303
Parent Company [Member]
Assets
Total cash and cash equivalents	30,653	13,361	$ 15,736	$ 26,507
Investment in subsidiaries	502,844	497,623
Other assets	1,186	1,318
Total assets	534,683	512,302
Liabilities
Borrowings		12,500
Subordinated debentures	37,837	37,653
Other liabilities	4,854	5,071
Stockholders' Equity	491,992	457,078
Total liabilities and stockholders' equity	$ 534,683	$ 512,302

Condensed Financial Informati_4

Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Income (Expense)
Other income									$ 2,141	$ 1,773	$ 1,039
Interest expense	$ (9,894)	$ (8,499)	$ (7,191)	$ (6,015)	$ (5,319)	$ (4,191)	$ (3,607)	$ (3,266)	(31,599)	(16,383)	(20,537)
Employee benefit expense									(56,623)	(51,375)	(44,013)
Income Before Tax									63,560	47,953	32,713
Income Tax Benefit									(10,443)	(14,836)	(8,801)
Net Income	$ 13,133	$ 13,065	$ 14,115	$ 12,804	$ 7,650	$ 8,171	$ 9,072	$ 8,224	53,117	33,117	23,912
Preferred stock dividend									0	0	(42)
Net Income Available to Common Shareholders									53,117	33,117	23,870
Parent Company [Member]
Operating Income (Expense)
Dividend income from subsidiaries									46,950	27,000	20,000
Investment income											33
Other income										540	42
Interest expense									(2,475)	(2,791)	(2,376)
Employee benefit expense									(1,423)	(1,094)	(1,158)
Other expense									(357)	(326)	1,279
Income Before Undistributed Income of Subsidiaries									42,695	23,329	17,820
Undistributed Income of Subsidiaries									9,643	8,804	5,938
Income Before Tax									52,338	32,133	23,758
Income Tax Benefit									779	984	154
Net Income									53,117	33,117	23,912
Preferred stock dividend											(42)
Net Income Available to Common Shareholders									$ 53,117	$ 33,117	$ 23,870

Condensed Financial Informati_5

Condensed Financial Information (Parent Company Only) - Condensed Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Comprehensive Income [Line Items]
Net Income	$ 13,133	$ 13,065	$ 14,115	$ 12,804	$ 7,650	$ 8,171	$ 9,072	$ 8,224	$ 53,117	$ 33,117	$ 23,912
Other Comprehensive Income (Loss)
Change in fair value of derivative instruments, net of taxes									(25)	913	6
Other Comprehensive Income (Loss), Net of Tax									(3,827)	2,093	(4,921)
Comprehensive Income									49,290	35,210	18,991
Parent Company [Member]
Condensed Comprehensive Income [Line Items]
Net Income									53,117	33,117	23,912
Other Comprehensive Income (Loss)
Change in fair value of derivative instruments, net of taxes									(25)	913	6
Unrealized appreciation for the period on held to maturity securities, net of taxes									(150)	(166)	(424)
Unrealized appreciation (depreciation) on available for sale securities, net of taxes									(4,003)	1,371	(3,310)
Less: reclassification adjustment for realized (gains) losses included in net income, net of taxes									351	(25)	(1,193)
Other Comprehensive Income (Loss), Net of Tax									(3,827)	2,093	(4,921)
Comprehensive Income									$ 49,290	$ 35,210	$ 18,991

Condensed Financial Informati_6

Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 13,133	$ 13,065	$ 14,115	$ 12,804	$ 7,650	$ 8,171	$ 9,072	$ 8,224	$ 53,117	$ 33,117	$ 23,912
Items not requiring (providing) cash
Change in Share based compensation									251	325	324
Other assets									2,460	6,173	489
Other liabilities									658	(5,776)	(8,381)
Net cash provided by operating activities									72,440	49,064	25,548
Transfer of loans to other real estate
Net cash used in investing activities									(303,916)	(278,924)	222,307
Financing Activities
Redemption of preferred stock											(12,500)
Net change in borrowings									(13,589)	259,895	(255,994)
Dividends paid on preferred shares											(42)
Dividends paid on common shares									(15,418)	(11,720)	(8,382)
Proceeds from issuance of stock									622	1,604	572
Net cash provided by (used in) financing activities									229,988	236,419	(229,756)
Net Change in Cash and Cash Equivalents									(1,488)	6,559	18,099
Cash and Cash Equivalents at Beginning of Year				59,980				53,421	59,980	53,421	35,322
Cash and Cash Equivalents at End of Year	58,492				59,980				58,492	59,980	53,421
Kosciusko Financial Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses											30,437
LaPorte Bancorp Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses											116,521
Central National Bank & Trust [Member]
Transfer of loans to other real estate
Acquisition of businesses											22,549
Lafayette Community Bancorp [Member]
Transfer of loans to other real estate
Acquisition of businesses										20,425
Wolverine Bancorp Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses										12,723
Parent Company [Member]
Operating Activities
Net income									53,117	33,117	23,912
Items not requiring (providing) cash
Equity in undistributed net income of subsidiaries									(9,643)	(8,804)	(5,938)
Change in Share based compensation									251	325	284
Amortization of unearned compensation									169	135	324
Other assets									132	388	888
Other liabilities									378	(1,675)	(244)
Net cash provided by operating activities									44,404	23,486	19,226
Transfer of loans to other real estate
Net cash used in investing activities										(8,942)	(29,145)
Financing Activities
Redemption of preferred stock											(12,500)
Net change in borrowings									(12,316)	(6,803)	19,500
Dividends paid on preferred shares											(42)
Dividends paid on common shares									(15,418)	(11,720)	(8,382)
Proceeds from issuance of stock									622	1,604	572
Net cash provided by (used in) financing activities									(27,112)	(16,919)	(852)
Net Change in Cash and Cash Equivalents									17,292	(2,375)	(10,771)
Cash and Cash Equivalents at Beginning of Year				$ 13,361				$ 15,736	13,361	15,736	26,507
Cash and Cash Equivalents at End of Year	$ 30,653				$ 13,361				$ 30,653	13,361	15,736
Parent Company [Member] | Kosciusko Financial Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses											(6,741)
Parent Company [Member] | LaPorte Bancorp Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses											(17,108)
Parent Company [Member] | Central National Bank & Trust [Member]
Transfer of loans to other real estate
Acquisition of businesses											$ (5,296)
Parent Company [Member] | Lafayette Community Bancorp [Member]
Transfer of loans to other real estate
Acquisition of businesses										(1,254)
Parent Company [Member] | Wolverine Bancorp Inc [Member]
Transfer of loans to other real estate
Acquisition of businesses										$ (7,688)

Quarterly Results of Operatio_3

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 43,730	$ 42,271	$ 40,741	$ 39,426	$ 36,774	$ 32,070	$ 30,805	$ 28,834	$ 166,168	$ 128,483	$ 106,529
Interest expense	9,894	8,499	7,191	6,015	5,319	4,191	3,607	3,266	31,599	16,383	20,537
Net interest income	33,836	33,772	33,550	33,411	31,455	27,879	27,198	25,568	134,569	112,100	85,992
Provision for loan losses	528	1,176	635	567	1,100	710	330	330	2,906	2,470	1,842
Gain (loss) on sale of securities	(332)	(122)		11		6	(3)	35	(443)	38	1,836
Net income	$ 13,133	$ 13,065	$ 14,115	$ 12,804	$ 7,650	$ 8,171	$ 9,072	$ 8,224	$ 53,117	$ 33,117	$ 23,912
Earnings per share:
Basic	$ 0.35	$ 0.34	$ 0.37	$ 0.33	$ 0.20	$ 0.24	$ 0.27	$ 0.25	$ 1.39	$ 0.96	$ 0.80
Diluted	$ 0.34	$ 0.34	$ 0.37	$ 0.33	$ 0.20	$ 0.24	$ 0.27	$ 0.25	$ 1.38	$ 0.95	$ 0.79
Average shares outstanding:
Basic	38,367,972	38,365,379	38,347,612	38,306,395	37,711,200	33,870,240	33,264,697	33,263,289	38,347,059	34,553,736	29,981,592
Diluted	38,488,861	38,534,970	38,519,401	38,468,810	37,893,014	34,072,909	33,483,584	33,489,106	38,495,231	34,760,438	30,123,614

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - Salin Banc shares Inc [Member] - USD ($) $ / shares in Units, $ in Millions	Oct. 29, 2018	Dec. 31, 2018	Oct. 26, 2018
Business Acquisition [Line Items]
Total assets		$ 929.4
Total deposits		749.5
Total loans		$ 593.7
Exchange ratio per share	23907.50%
Cash paid for each share	$ 84,417.17
Market closing price per share			$ 16.95
Estimated transaction value			$ 135.3