First Merchants (FRME) 10-K 1 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Feb. 22, 2017	Jun. 30, 2016
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	FRME
Entity Registrant Name	FIRST MERCHANTS CORP
Entity Central Index Key	712,534
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,248,140
Entity Public Float			$ 1,016,468

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 127,927	$ 102,170
Interest-bearing time deposits	24,459	32,315
Investment securities available for sale	696,862	658,400
Investment securities held to maturity (fair value of $611,933 and $632,380)	607,643	618,599
Loans held for sale	2,929	9,894
Loans	5,139,645	4,693,822
Less: Allowance for loan losses	(66,037)	(62,453)
Net Loans	5,073,608	4,631,369
Premises and equipment	94,432	97,648
Federal Reserve and Federal Home Loan Bank stock	17,964	37,633
Interest receivable	26,194	24,415
Core deposit intangibles	14,866	16,635
Goodwill	244,000	243,129
Cash surrender value of life insurance	201,671	200,539
Other real estate owned	8,966	17,257
Tax asset, deferred and receivable	39,384	46,977
Other assets	30,706	24,023
TOTAL ASSETS	7,211,611	6,761,003
Deposits:
Noninterest-bearing	1,348,267	1,266,027
Interest-bearing	4,208,231	4,023,620
Total Deposits	5,556,498	5,289,647
Borrowings:
Federal funds purchased	120,349	49,721
Securities sold under repurchase agreements	146,480	155,325
Federal Home Loan Bank advances	298,923	235,652
Subordinated debentures and term loans	128,445	127,846
Total Borrowings	694,197	568,544
Interest payable	3,110	3,092
Other liabilities	56,149	49,211
Total Liabilities	6,309,954	5,910,494
COMMITMENTS AND CONTINGENT LIABILITIES
STOCKHOLDERS' EQUITY
Cumulative Preferred Stock	125	125
Common Stock	5,114	5,083
Additional paid-in capital	509,018	504,530
Retained earnings	400,981	342,133
Accumulated other comprehensive loss	(13,581)	(1,362)
Total Stockholders' Equity	901,657	850,509
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 7,211,611	$ 6,761,003

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Investment securities held to maturity	$ 611,933	$ 632,380
Common Stock, stated value (in dollars per share)	$ 0.125	$ 0.125
Common Stock, shares authorized	50,000,000	50,000,000
Common Stock, shares issued	40,912,697	40,664,259
Common Stock, shares outstanding	40,912,697	40,664,259
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, liquidation value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, shares authorized	600	600
Preferred Stock, shares issued	125	125
Preferred Stock, shares outstanding	125	125

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans receivable:
Taxable	$ 210,302	$ 180,805	$ 172,039
Tax-exempt	6,525	3,459	327
Investment securities:
Taxable	16,415	17,885	19,882
Tax-exempt	18,622	16,922	14,383
Deposits with financial institutions	350	160	124
Federal Reserve and Federal Home Loan Bank stock	1,098	1,967	2,124
Total Interest Income	253,312	221,198	208,879
INTEREST EXPENSE
Deposits	15,914	14,855	11,678
Federal funds purchased	102	74	177
Securities sold under repurchase agreements	374	368	529
Federal Home Loan Bank advances	3,264	2,836	2,842
Subordinated debentures, revolving credit lines and term loans	7,185	6,661	6,616
Total Interest Expense	26,839	24,794	21,842
NET INTEREST INCOME	226,473	196,404	187,037
Provision for loan losses	5,657	417	2,560
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	220,816	195,987	184,477
OTHER INCOME
Service charges on deposit accounts	17,762	16,201	15,747
Fiduciary activities	9,818	9,196	8,966
Other customer fees	19,315	16,959	15,699
Commission income		4,147	7,411
Earnings on cash surrender value of life insurance	4,273	2,919	3,659
Net gains and fees on sales of loans	7,052	6,483	4,899
Net realized gains on sales of available for sale securities	3,389	2,670	3,581
Gain on sale of insurance subsidiary		8,265
Gain on cancellation of subordinated debentures		1,250
Other income	3,594	1,778	1,854
Total Other Income	65,203	69,868	61,816
OTHER EXPENSES
Salaries and employee benefits	102,552	101,908	96,499
Net occupancy	16,997	14,668	13,831
Equipment	12,497	10,787	9,337
Marketing	3,008	3,493	3,464
Outside data processing fees	9,148	7,109	7,315
Printing and office supplies	1,348	1,353	1,565
Core deposit amortization	3,910	2,835	2,445
FDIC assessments	3,036	3,655	3,738
Other real estate owned and foreclosure expenses	2,877	3,956	3,462
Professional and other outside services	6,516	9,855	8,116
Other expenses	15,470	15,187	14,236
Total Other Expenses	177,359	174,806	164,008
INCOME BEFORE INCOME TAX	108,660	91,049	82,285
Income tax expense	27,609	25,665	22,123
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 81,051	$ 65,384	$ 60,162
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS PER SHARE:
Basic (in dollars per share)	$ 1.99	$ 1.73	$ 1.66
Diluted (in dollars per share)	$ 1.98	$ 1.72	$ 1.65

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 81,051	$ 65,384	$ 60,162
Other comprehensive income (loss) net of tax:
Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $4,893, $20, and $8,001	(9,087)	(37)	14,860
Unrealized gain on securities available for sale for which a portion of an other than temporary impairment has been recognized in income, net of tax of $0, $0, and $995			1,847
Unrealized loss on cash flow hedges arising during the period, net of tax of $128, $588, and $1,397	(240)	(1,093)	(2,599)
Reclassification adjustment for net gains included in net income net of tax of $749, $435, and $760	(1,390)	(808)	(1,410)
Defined benefit pension plans, net of tax of $809, $1,187, and $4,264
Net gain (loss) arising during period	(470)	2,404	(7,580)
Amortization of prior service cost	(1,032)	(198)	(338)
Period change	(12,219)	268	4,780
Comprehensive income	$ 68,832	$ 65,652	$ 64,942

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Unrealized holding gain (loss) on securities available for sale arising during the period, tax	$ (4,893)	$ (20)	$ 8,001
Unrealized gain (loss) on securities available for sale for which a portion of an other than temporary impairment has been recognized in income, tax	0	0	(995)
Unrealized gain (loss) on cash flow hedges arising during the period, tax	(128)	(588)	(1,397)
Reclassification adjustment for net losses (gains) included in net income, tax	749	435	760
Defined benefit pension plans, tax	$ 809	$ (1,187)	$ 4,264

CONSOLIDATED STATEMENT OF STOCK

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2013		125	35,921,761
Beginning balance at Dec. 31, 2013	$ 634,923	$ 125	$ 4,490	$ 393,783	$ 242,935	$ (6,410)
Comprehensive income
Net income	60,162				60,162
Other comprehensive income (loss), net of tax	4,780					4,780
Cash dividends on common stock	(10,694)				(10,694)
Issuance of common stock related to acquisition (in shares)			1,574,298
Issuance of common stock related to acquisition	34,981		$ 197	34,784
Share-based compensation (in shares)			132,446
Share-based compensation	2,177		$ 17	2,160
Stock Issued under employee benefit plans (in shares)			26,547
Stock issued under employee benefit plans	478		$ 3	475
Stock issued under dividend reinvestment and stock purchase plan (in shares)			24,556
Stock issued under dividend reinvestment and stock purchase plan	523		$ 3	520
Stock options exercised (in shares)			41,249
Stock options exercised	564		$ 5	559
Stock redeemed (in shares)			(50,909)
Stock redeemed	(1,067)		$ (6)	(1,061)
Ending balance (in shares) at Dec. 31, 2014		125	37,669,948
Ending balance at Dec. 31, 2014	726,827	$ 125	$ 4,709	431,220	292,403	(1,630)
Comprehensive income
Net income	65,384				65,384
Other comprehensive income (loss), net of tax	268					268
Cash dividends on common stock	(15,654)				(15,654)
Issuance of common stock related to acquisition (in shares)			2,769,568
Issuance of common stock related to acquisition	70,402		$ 346	70,056
Share-based compensation (in shares)			149,577
Share-based compensation	2,270		$ 19	2,251
Stock Issued under employee benefit plans (in shares)			22,074
Stock issued under employee benefit plans	460		$ 3	457
Stock issued under dividend reinvestment and stock purchase plan (in shares)			26,375
Stock issued under dividend reinvestment and stock purchase plan	661		$ 3	658
Stock options exercised (in shares)			96,066
Stock options exercised	1,531		$ 12	1,519
Stock redeemed (in shares)			(69,349)
Stock redeemed	(1,640)		$ (9)	(1,631)
Ending balance (in shares) at Dec. 31, 2015		125	40,664,259
Ending balance at Dec. 31, 2015	850,509	$ 125	$ 5,083	504,530	342,133	(1,362)
Comprehensive income
Net income	81,051				81,051
Other comprehensive income (loss), net of tax	(12,219)					(12,219)
Cash dividends on common stock	(22,203)				(22,203)
Issuance of common stock related to acquisition
Share-based compensation (in shares)			141,126
Share-based compensation	2,600		$ 17	2,583
Stock Issued under employee benefit plans (in shares)			20,545
Stock issued under employee benefit plans	462		$ 3	459
Stock issued under dividend reinvestment and stock purchase plan (in shares)			30,297
Stock issued under dividend reinvestment and stock purchase plan	$ 835		$ 4	831
Stock options exercised (in shares)	128,848		128,848
Stock options exercised	$ 2,602		$ 16	2,586
Stock redeemed (in shares)			(72,378)
Stock redeemed	(1,980)		$ (9)	(1,971)
Ending balance (in shares) at Dec. 31, 2016		125	40,912,697
Ending balance at Dec. 31, 2016	$ 901,657	$ 125	$ 5,114	$ 509,018	$ 400,981	$ (13,581)

CONSOLIDATED STATEMENT OF STOC8

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in dollars per share)	$ 0.54	$ 0.41	$ 0.29

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flow From Operating Activities:
Net income	$ 81,051	$ 65,384	$ 60,162
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	5,657	417	2,560
Depreciation and amortization	7,161	6,262	6,007
Change in deferred taxes	8,611	4,444	15,048
Share-based compensation	2,600	2,270	2,177
Tax benefit from stock options exercised	(107)	(70)	(60)
Loans originated for sale	(354,265)	(364,411)	(222,892)
Proceeds from sales of Loans	367,148	367,377	225,158
Gains on sales of loans held for sale	(5,918)	(5,625)	(4,170)
Gain on the sale of insurance subsidiary		8,265
Gain on cancellation of subordinated debentures		(1,250)
Gains on sales of securities available for sale	(3,389)	(2,670)	(3,581)
Change in interest receivable	(1,779)	(2,833)	(545)
Change in interest payable	18	(162)	1,332
Other adjustments	72	(4,208)	(5,356)
Net cash provided by operating activities	106,860	56,660	75,840
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	7,856	24,917	24,075
Purchases of:
Securities available for sale	(281,470)	(200,154)	(110,936)
Securities held to maturity	(110,797)	(87,282)	(142,988)
Proceeds from sales of securities available for sale	167,186	83,647	126,575
Proceeds from maturities of:
Securities available for sale	73,956	63,124	68,339
Securities held to maturity	119,052	98,581	69,420
Redemption (Purchase) of Federal Reserve and Federal Home Loan Bank stock	19,669	7,268	(413)
Net change in loans	(452,781)	(350,287)	(170,109)
Net cash and cash equivalents received (paid) in acquisition		(7,936)	(10,084)
Net cash received from sale of insurance subsidiary		15,155
Proceeds from the sale of other real estate owned	9,974	12,567	14,241
Other investing activities	(4,490)	9	5,889
Net cash used in investing activities	(451,845)	(340,391)	(125,991)
Net change in :
Demand and savings deposits	332,600	240,736	53,062
Certificates of deposit and other time deposits	(66,920)	(79,656)	127,740
Borrowings	1,107,795	491,660	678,290
Repayment of borrowings	(982,449)	(370,813)	(789,563)
Cash dividends on common stock	(22,203)	(15,654)	(10,694)
Stock issued under employee benefit plans	462	460	478
Stock issued under dividend reinvestment and stock purchase plans	835	661	523
Stock options exercised	2,495	1,461	504
Tax benefit from stock options exercised	107	70	60
Stock redeemed	(1,980)	(1,640)	(1,067)
Net cash provided by financing activities	370,742	267,285	59,333
Net Change in Cash and Cash Equivalents	25,757	(16,446)	9,182
Cash and Cash Equivalents, beginning of the year	102,170	118,616	109,434
Cash and Cash Equivalents, end of year	127,927	102,170	118,616
Additional cash flow information:
Interest paid	26,821	24,903	20,412
Income tax paid	11,999	21,200	6,209
Loans transferred to other real estate owned	1,684	3,644	4,431
Fixed assets transferred to other real estate owned	360	1,600	297
Non-cash investing activities using trade date accounting	14,179	1,559	3,170
Liabilities assumed in conjunction with acquisitions
Fair value of assets acquired	0	635,047	280,725
Cash received (paid) in acquisition		(14,500)	(14,208)
Less: Common stock issued		70,402	34,981
Liabilities assumed	$ 0	$ 550,145	$ 231,536

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accounting and reporting policies of the Corporation and the Bank, conform to accounting principles generally accepted in the United States of America and reporting practices followed by the banking industry. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The Corporation is a financial holding company whose principal activity is the ownership and management of the Bank and operates in a single significant business segment. The Bank provides full banking services under an Indiana state-charter. On April 1, 2016, the Board of Directors of the Bank adopted final resolutions approving the conversion of the Bank’s banking charter from a national association to an Indiana state-chartered bank. The initial application to convert was filed with the Indiana DFI on February 9, 2016. Between the date of initial application and adoption of the final resolutions by the Bank’s Board, the Indiana DFI and the FDIC conducted a joint exam of the Bank and its banking activities. Final regulatory approval of the application was obtained at the meeting of the Members of the Indiana DFI on April 14, 2016. The Bank filed official conversion documents effective April 15, 2016. As a result of the conversion, the Indiana DFI became the Bank’s primary regulator and the FDIC became the Bank’s primary federal regulator. Upon conversion, the Bank’s official name changed from “First Merchants Bank, National Association” to “First Merchants Bank.” The Bank continues operating under the following trade names in certain geographic markets: Lafayette Bank and Trust and First Merchants Private Wealth Advisors (each as a division of First Merchants Bank). The conversion is not expected to affect the Bank’s operations or customers in any way, and Bank customers will continue to receive identical protection on deposits through the FDIC’s deposit insurance program. The Bank generates commercial, mortgage, and consumer loans and receives deposits from customers located primarily in central and northwest Indiana, northeast Illinois and central Ohio counties. The Bank’s loans are generally secured by specific items of collateral, including real property, consumer assets and business assets. A brief description of current accounting practices and current valuation methodologies are presented below. CONSOLIDATION of the Corporation's financial statements include the accounts of the Corporation and all its subsidiaries, after elimination of all material intercompany transactions. BUSINESS COMBINATIONS are accounted for under the acquisition method of accounting. Under the acquisition method, assets and liabilities of the business acquired are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value of the net tangible and intangible assets acquired recorded as goodwill. Results of operations of the acquired business are included in the income statement from the date of acquisition. AVAILABLE FOR SALE SECURITIES are recorded at fair value on a recurring basis with the unrealized gains and losses, net of applicable income taxes, recorded in other comprehensive income. Realized gains and losses are recorded in earnings and the prior fair value adjustments are reclassified within stockholders' equity. Gains and losses on sales of securities are determined on the specific-identification method. Amortization of premiums and accretion of discounts are recorded as interest income from securities. Available for sale and held to maturity securities are evaluated for OTTI at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. The investment securities portfolio is evaluated for OTTI by segregating the portfolio into two general segments and applying the appropriate OTTI model. Investment securities are generally evaluated for OTTI under ASC 320. However, certain purchased beneficial interest, including certain non-agency government-sponsored mortgage-backed securities, asset-backed securities and collateralized debt obligations are evaluated using the model outlined in ASC 325-10. In determining OTTI under ASC 320, management considers many factors, including: (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near term prospects of the issuer, (3) whether the market decline was affected by macroeconomic conditions, and (4) whether the Corporation has the intent to sell the debt security or more likely than not, will be required to sell the debt security before its anticipated recovery. The assessment of whether an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time. When OTTI occurs, the amount of OTTI recognized in the income statement depends on whether the Corporation intends to sell the security or it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis, less any recognized credit loss. If the intent is to sell, or it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis, less any recognized credit loss, the OTTI shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis, less any recognized credit loss, and its fair value at the balance sheet date. If the intent is not to sell the security and it is not more likely than not that the Corporation will be required to sell the security before the recovery of its amortized cost basis less any recognized credit loss, the OTTI has been separated into the amount representing the credit loss and the amount related to all other factors. The amount of the total OTTI related to the credit loss is determined based on the present value of cash flows expected to be collected and is recognized in earnings. The amount of the total OTTI related to other factors is recognized in other comprehensive income, net of applicable income taxes. The previous amortized cost basis less the OTTI recognized in earnings becomes the new amortized cost basis of the investment. HELD TO MATURITY SECURITIES are classified as held to maturity when the Corporation has the positive intent and ability to hold the securities to maturity. Securities held to maturity are carried at amortized cost. For held to maturity debt securities, the amount of an OTTI recorded in other comprehensive income for the noncredit portion of a previous other-than-temporary impairment is amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security. LOANS HELD FOR SALE are carried at the principal amount outstanding. The carrying amount approximates fair value due to the short duration between origination and the date of sale. LOANS held in the Corporation’s portfolio are carried at the principal amount outstanding, net of unearned income. Certain non-accrual, substantially delinquent and renegotiated loans classified as troubled debt restructures may be considered to be impaired in accordance with ASC 310. Under ASC 310, a loan is impaired when, based on current information or events, it is probable that the Bank will be unable to collect all amounts due (principal and interest) according to the contractual terms of the loan agreement. Renegotiated consumer loans classified as troubled debt restructures are considered to be impaired. In applying the provisions of ASC 310, the Corporation considers all other investments in one-to-four family residential loans and consumer installment loans to be homogeneous and therefore excluded from separate identification for evaluation of impairment. Interest income is accrued on the principal balances of loans. The accrual of interest is discontinued on a loan when, in management’s opinion, the borrower may be unable to meet payments as they become due. When the interest accrual is discontinued, all unpaid accrued interest is reversed against earnings when considered uncollectable. Interest income accrued in the prior year, if any, is charged to the allowance for loan losses. Interest income is subsequently recognized only to the extent cash payments are received and the loan is returned to accruing status. Certain loan fees and direct costs are being deferred and amortized as an adjustment of yield on the loans. Impaired loans are carried at the fair value of collateral if the loan is collateral dependent, or the present value of estimated future cash flows using the loan’s existing rate. A portion of the allowance for loan losses is allocated to impaired loans if the value of such loans is deemed to be less than the unpaid balance. If these allocations cause the allowance for loan losses to increase, such increase is reported as a component of the provision for loan losses. Loan losses are charged against the allowance when management believes the uncollectability of the loan is confirmed. The valuation would be considered Level 3, consisting of appraisals of underlying collateral and discounted cash flow analysis. Loan commitments and letters-of-credit generally have short-term, variable-rate features and contain clauses which limit the Bank’s exposure to changes in customer credit quality. Accordingly, their carrying values, which are immaterial at the respective balance sheet dates, are reasonable estimates of fair value. LOANS ACQUIRED IN BUSINESS COMBINATIONS 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 purchased credit impaired. Evidence of credit quality deterioration as of purchase dates may include information such as past-due and nonaccrual status, borrower credit scores and recent loan to value percentages. Acquired credit-impaired loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality (ASC 310-30). These loans are initially measured at fair value based upon expected cash flows without anticipation of prepayments and includes estimated future credit losses expected to be incurred over the life of the loans. As a result, related discounts are recognized subsequently through accretion based on the expected cash flows of the acquired loans. For purposes of applying ASC 310-30, loans acquired in business combinations are individually evaluated for the initial fair value measurement. Accordingly, allowances for credit losses related to these loans are not carried over and recorded at the acquisition date. The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the nonaccretable portion of the fair value discount or premium. The accretable portion of the fair value discount or premium is the difference between the expected cash flows and the net present value of expected cash flows, with such difference accreted into earnings over the term of the loans. Acquired loans not accounted for under ASC 310-30 are accounted for under ASC 310-20, which allows the fair value adjustment to be accreted into income over the remaining life of the loans. ALLOWANCE FOR LOAN LOSSES is maintained to absorb losses inherent in the loan portfolio and is based on ongoing, quarterly assessments of the probable losses inherent in the loan portfolio. The allowance is increased by the provision for loan losses, which is charged against current operating results. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. The Corporation’s strategy for credit risk management includes credit policies and underwriting criteria for all loans, as well as an overall credit limit for each customer significantly below legal lending limits. The strategy also emphasizes diversification on regional geographic and industry levels, regular credit quality reviews and management reviews of large credit exposures and loans experiencing deterioration of credit quality. The Corporation’s methodology for assessing the appropriateness of the allowance consists of three key elements – the determination of the appropriate reserves for impaired loans accounted for under ASC 310, probable losses estimated from historical loss rates, and probable losses resulting from economic, environmental, qualitative or other deterioration above and beyond what is reflected in the first two components of the allowance. Commercial relationships greater than $500,000 that exhibit probable or observed credit weaknesses are subject to individual review. Where appropriate, reserves are allocated to individual loans based on management’s estimate of the borrower’s ability to repay the loan given the availability of collateral, other sources of cash flow and legal options available to the Corporation. Included in the review of individual loans are those that are impaired as provided in ASC 310. Any allowances for impaired loans are measured based on the fair value of the underlying collateral if collateral dependent or the present value of expected future cash flows discounted at the loan’s effective interest rate. The Corporation evaluates the collectability of principal when assessing the need for a loss accrual. Historical loss rates are applied to other commercial loans not subject to specific reserve allocations. The historical allocation for commercial loans graded pass are established by loan segments using loss rates based on the Corporation’s migration analysis. This migration analysis shows the loss rates for each segment of loans based on the loan grades at the beginning of the twelve month period. This loss rate is then applied to the current portfolio of loans in each respective loan segment. Homogenous loans, such as consumer installment and residential mortgage loans, are not individually risk graded. Reserves are established for each segment of loans using loss rates based on charge offs for the same period as the migration analysis used for commercial loans. Historical loss allocations for commercial and consumer loans may be adjusted for significant factors that, in management’s judgment, reflect the impact of any current conditions on loss recognition. Factors which management considers in the analysis include the effects of the national and local economies, trends in loan growth and charge-off rates, changes in mix, concentration of loans in specific industries, asset quality trends (delinquencies, charge offs and non-accrual loans), risk management and loan administration, changes in the internal lending policies and credit standards, examination results from bank regulatory agencies and the Corporation’s internal loan review. PENSION benefits are provided to the Corporation’s employees. Its accounting policies related to pensions and other post retirement benefits reflect the guidance in ASC 715, Compensation – Retirement Benefits. The Corporation does not consolidate the assets and liabilities associated with the pension plan. Instead, the Corporation recognizes the funded status of the plan in the consolidated balance sheets. The measurement of the funded status and the annual pension expense involves actuarial and economic assumptions. Various statistical and other factors, which attempt to anticipate future events, are used in calculating the expense and liabilities related to the plans. Key factors include assumptions on the expected rates of return on plan assets, discount rates, expected rates of salary increases and health care costs and trends. The Corporation considers market conditions, including changes in investment returns and interest rates in making these assumptions. The primary assumptions used in determining the Corporation’s pension and post retirement benefit obligations and related expenses are presented in Note 20. PENSION AND OTHER POST RETIREMENT BENEFIT PLANS, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. PREMISES AND EQUIPMENT is carried at cost net of accumulated depreciation. Depreciation is computed using the straight-line and declining balance methods based on the estimated useful lives of the assets ranging from three to forty years. Maintenance and repairs are expensed as incurred, while major additions and improvements, which extend the useful life, are capitalized. Gains and losses on dispositions are included in current operations. FEDERAL HOME LOAN BANK STOCK is a required investment for institutions that are members of the FHLB. The Bank is a member of the FHLB of Indianapolis. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. INTANGIBLE ASSETS that are subject to amortization, including core deposit intangibles, are being amortized on both the straight-line and accelerated basis over three to twenty years. Intangible assets are periodically evaluated as to the recoverability of their carrying value. GOODWILL is maintained by applying the provisions of ASC 350. For purchase acquisitions, the Corporation is required to record the assets acquired, including identified intangible assets, and the liabilities assumed at their fair value, which in many instances involves estimates based on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analysis or other valuation techniques that may include estimates of attrition, inflation, asset growth rates or other relevant factors. In addition, the determination of the useful lives for which an intangible asset will be amortized is subjective. Under ASC 350, Intangibles – Goodwill and Other , the Corporation is required to evaluate goodwill for impairment on an annual basis, as well as on an interim basis, if events or changes indicate that the asset may be impaired, indicating that the carrying value may not be recoverable. The Corporation has historically elected to test for goodwill impairment as of October 1 of each year and has determined that no impairment exists. BANK OWNED LIFE INSURANCE has been purchased on certain employees and directors of the Corporation. The Corporation 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. OTHER REAL ESTATE OWNED consists of assets acquired through, or in lieu of, loan foreclosure and are held for sale. They are initially recorded at fair value less cost to sell at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations and changes in the valuation are included in other real estate owned and foreclosure expenses. Other real estate owned also includes bank premises formerly, but no longer used for banking. Bank premises are transferred at the lower of carrying value or fair value less cost to sell. DERIVATIVE INSTRUMENTS are carried at the fair value of the derivatives and reflects the estimated amounts that would have been received to terminate these contracts at the reporting date based upon pricing or valuation models applied to current market information. As part of the asset/liability management program, the Corporation will utilize, from time to time, interest rate floors, caps or swaps to reduce its sensitivity to interest rate fluctuations. These are derivative instruments, which are recorded as assets or liabilities in the consolidated balance sheets at fair value. Changes in the fair values of derivatives are reported in the consolidated statements of operations or AOCI depending on the use of the derivative and whether the instrument qualifies for hedge accounting. The key criterion for the hedge accounting is that the hedged relationship must be highly effective in achieving offsetting changes in those cash flows that are attributable to the hedged risk, both at inception of the hedge and on an ongoing basis. Derivatives that qualify for the hedge accounting treatment are designated as either: a hedge of the fair value of the recognized asset or liability or of an unrecognized firm commitment (a fair value hedge) or a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (a cash flow hedge). To date, the Corporation has only entered into a cash flow hedge. For cash flow hedges, changes in the fair values of the derivative instruments are reported in AOCI to the extent the hedge is effective. The gains and losses on derivative instruments that are reported in AOCI are reflected in the consolidated statements of income in the periods in which the results of operations are impacted by the variability of the cash flows of the hedged item. Generally, net interest income is increased or decreased by amounts receivable or payable with respect to the derivatives, which qualify for hedge accounting. At inception of the hedge, the Corporation establishes the method it uses for assessing the effectiveness of the hedging derivative and the measurement approach for determining the ineffective aspect of the hedge. The ineffective portion of the hedge, if any, is recognized in the consolidated statements of income. The Corporation excludes the time value expiration of the hedge when measuring ineffectiveness. The Corporation offers interest rate derivative products (e.g. interest rate swaps) to certain of its high-quality commercial borrowers. This product allows customers to enter into an agreement with the Corporation to swap their variable rate loan to a fixed rate. These derivative products are designed to reduce, eliminate or modify the risk of changes in the borrower’s interest rate or market price risk. The extension of credit incurred through the execution of these derivative products is subject to the same approvals and rigorous underwriting standards as the related traditional credit product. The Corporation limits its risk exposure to these products by entering into a mirror-image, offsetting swap agreement with a separate, well-capitalized and rated counterparty previously approved by the Credit and Asset Liability Committee. By using these interest rate swap arrangements, the Corporation is also better insulated from the interest rate risk associated with underwriting fixed-rate loans. These derivative contracts are not designated against specific assets or liabilities under ASC 815, Derivatives and Hedging , and, therefore, do not qualify for hedge accounting. The derivatives are recorded on the balance sheet at fair value and changes in fair value of both the customer and the offsetting swap agreements are recorded (and essentially offset) in non-interest income. The fair value of the derivative instruments incorporates a consideration of credit risk (in accordance with ASC 820), resulting in some volatility in earnings each period. INCOME TAX in the consolidated statements of income includes deferred income tax provisions or benefits for all significant temporary differences in recognizing income and expenses for financial reporting and income tax purposes. The Corporation files consolidated income tax returns with its subsidiaries. The Corporation is generally no longer subject to U.S. federal, state and local income tax examinations by tax authorities for tax years before 2013 . The Corporation adopted the provisions of the ASC 740, Income Taxes , which prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. As a result of the implementation of ASC 740, the Corporation did not identify any uncertain tax positions that it believes should be recognized in the financial statements. The Corporation's policy is to recognize interest and penalties related to unrecognized tax benefits, if any, as a component of income tax expense. STOCK OPTION AND RESTRICTED STOCK AWARD PLANS are maintained by the Corporation. The compensation costs are recognized for stock options and restricted stock awards issued to employees and directors based on the fair value of these awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options. The market price of the Corporation’s common stock at the date of grant is used for restricted stock awards. Compensation expense is recognized over the appropriate service period, which is generally two or three years. TRANSFERS 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 Corporation 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 Corporation 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. NET INCOME PER SHARE is computed by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding. Diluted net income per share is computed by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding, plus the dilutive effect of outstanding stock options and nonvested restricted stock. RECLASSIFICATIONS have been made to prior financial statements to conform to the current financial statement presentation. These reclassifications had no effect on net income.

Acquisitions and Divestitures

Acquisitions and Divestitures	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Acquisitions and Divestitures	ACQUISITIONS AND DIVESTITURES Ameriana Bancorp, Inc. On December 31, 2015, the Corporation acquired 100 percent of Ameriana. Ameriana merged with and into the Corporation (the "Ameriana Merger") whereupon the separate corporate existence of Ameriana ceased and the Corporation survived. Immediately following the Ameriana Merger, Ameriana Bank, an Indiana Bank and wholly-owned subsidiary of Ameriana, merged with and into the Bank, with the Bank continuing as the surviving bank. Ameriana was headquartered in New Castle, Indiana and had 13 banking centers serving central and east central Indiana. Pursuant to the merger agreement, each Ameriana shareholder received 0.9037 shares of First Merchants common stock for each outstanding share of Ameriana common stock held. The Corporation issued approximately 2.8 million shares of common stock, which was valued at approximately $70.4 million . The Corporation engaged in this transaction with the expectation that it would be accretive to income and expand the existing footprint in central and east central Indiana. Goodwill resulted from this transaction due to the expected synergies and economies of scale that were expected. The purchase price of the Ameriana acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 61,754 Loans 316,929 Premises and equipment 13,946 Federal Home Loan Bank stock 2,693 Other real estate owned 5,613 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 6,713 Deposits (383,718 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,884 ) Subordinated Debentures (5,487 ) Other liabilities (9,451 ) Net tangible assets acquired 26,436 Core deposit intangible 5,342 Goodwill 38,624 Purchase price $ 70,402 Of the total purchase price, $5,342,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The remaining purchase price has been allocated to goodwill, which is not deductible for tax purposes. C Financial Corporation On April 17, 2015, the Corporation acquired 100 percent of C Financial. C Financial merged with and into the Corporation (the “C Financial Merger”) whereupon the separate corporate existence of C Financial ceased and the Corporation survived. Immediately following the C Financial Merger, Cooper State Bank, an Ohio state bank and wholly-owned subsidiary of C Financial, merged with and into the Bank, with the Bank continuing as the surviving bank. C Financial was headquartered in Columbus, Ohio and had 6 full service banking centers serving the Columbus, Ohio market. As part of the $14.5 million C Financial Merger, shareholders of C Financial received $6.738 in cash for each share of C Financial common stock held. The Corporation engaged in this transaction with the expectation that it would be accretive to income and expand the existing footprint in Columbus, Ohio. Goodwill resulted from this transaction due to the synergies and economies of scale that were expected. The purchase price of the C Financial acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 2,496 Federal Funds sold 7,018 Interest-bearing time deposits 922 Loans 110,625 Premises and equipment 7,290 Federal Home Loan Bank stock 855 Interest receivable 292 Other assets 119 Deposits (105,326 ) Interest payable (29 ) Federal Home Loan Bank Advances (18,958 ) Other liabilities (2,911 ) Net tangible assets acquired 2,393 Core deposit intangible 981 Goodwill 11,126 Purchase price $ 14,500 Of the total purchase price, $981,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The remaining purchase price has been allocated to goodwill, which is deductible over a 15 year period for tax purposes as this transaction was considered a taxable exchange. Community Bancshares, Inc. On November 7, 2014, the Corporation acquired 100 percent of Community. Community merged with and into the Corporation (the "Community Merger") whereupon the separate corporate existence of Community ceased and the Corporation survived. Immediately following the Community Merger, Community Bank, an Indiana bank and wholly-owned subsidiary of Community, merged with and into the Bank, with the Bank continuing as the surviving bank. Community was headquartered in Noblesville, Indiana and had 10 full-service banking centers serving central Indiana. Pursuant to the merger agreement, each outstanding share of common stock of Community was converted into the right to receive either (a) 4.0926 shares of the Corporation's common stock, plus cash in lieu of fractional shares; or (b) $85.94 in cash, based upon shareholder elections. The Corporation paid $14.2 million in cash and issued approximately 1.6 million shares of common stock, valued at approximately $35.0 million , for a total purchase price of approximately $49.2 million . The Corporation engaged in this transaction with the expectation that it would be accretive to income and expand the existing footprint in central Indiana. Goodwill resulted from this transaction due to the expected synergies and economies of scale that were expected. The purchase price of the Community acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 4,124 Interest -bearing time deposits 16,526 Investment Securities, available for sale 76,807 Loans 145,064 Premises and equipment 3,610 Federal Home Loan Bank stock 1,950 Interest Receivable 767 Cash surrender value of life insurance 3,266 Other real estate owned 6,662 Taxes, deferred and receivable 3,348 Other assets 167 Deposits (228,424 ) Interest payable (98 ) Other liabilities (3,014 ) Net tangible assets acquired $ 30,755 Core deposit intangible 4,658 Goodwill 13,776 Purchase price $ 49,189 Of the total purchase price, $4,658,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The remaining purchase price has been allocated to goodwill, which is not deductible for tax purposes. First Merchants Insurance Services, Inc. On June 12, 2015, the Corporation sold all of its stock in FMIG to USI. The sale price was $18.0 million , of which $16.0 million was paid at closing with the remaining $2.0 million paid through a two -year promissory note. The sale of FMIG generated a gain on sale of $8.3 million . Pro Forma Financial Information The results of operations of Ameriana, C Financial and Community have been included in the Corporation's consolidated financial statements since the acquisition dates. The following schedule includes pro forma results for the periods ended December 31, 2015 and 2014 as if the Ameriana and Community acquisitions had occurred as of the beginning of the comparable prior annual reporting period. Pro forma financial information of the C Financial acquisition is not included in the table below as it is deemed immaterial. 2015 2014 Total revenue (net interest income plus other income) $ 291,614 $ 284,890 Net income $ 60,497 $ 64,174 Net income available to common shareholders $ 60,497 $ 64,174 Earnings per share: Basic $ 1.49 $ 1.58 Diluted $ 1.48 $ 1.57 The pro forma information includes adjustments for interest income on loans, amortization of intangibles arising from the transaction, interest expense on deposits and borrowings acquired, premises expense for the banking centers acquired and the related income tax effects. The pro forma information for the year ended 2015 includes operating results from Ameriana as if the acquisition occurred at the beginning of the year. The 2015 pro forma includes $12.0 million , net of tax, of non-recurring expenses directly attributable to the Ameriana, C Financial and Community acquisitions and the FMIG divestiture. The pro forma information for the year ended 2014 includes $1.6 million of operating revenue from Community since the acquisition and approximately $1.8 million , net of tax, of non-recurring expenses directly attributable to the Community acquisition. The pro forma financial information is presented for information purposes only and is not indicative of the results of operations that actually would have been achieved had the acquisition consummated as of that time, nor is it intended to be a projection of future results.

Restriction on Cash and Due Fro

Restriction on Cash and Due From Banks	12 Months Ended
	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Restriction on Cash and Due From Banks	RESTRICTION ON CASH AND DUE FROM BANKS The Corporation considers all liquid investments with original maturities of three months or less to be cash equivalents. As of December 31, 2016 , cash and cash equivalents is defined to include cash on hand, deposits in other institutions and federal funds sold. On July 21, 2010, the Dodd-Frank Act was signed into law, which, in part, permanently raised the standard maximum deposit insurance amount to $250,000 . At December 31, 2016 , the Corporation’s interest-bearing cash accounts and noninterest-bearing transaction deposits held at other institutions exceeded federally insured limits by approximately $87,431,000 . Each correspondent bank’s financial performance and market rating are reviewed on a quarterly basis to ensure the Corporation has deposits only at institutions providing minimal risk for those exceeding the federally insured limits. Additionally, the Corporation had approximately $5,969,000 at the Federal Home Loan Bank and Federal Reserve Bank, which are government-sponsored entities not insured by the FDIC. The Corporation is required to maintain reserve funds in cash and/or on deposit with the Federal Reserve Bank. The reserve required at December 31, 2016 , was $24,153,000 .

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost, gross unrealized gains, gross unrealized losses and approximate market value of the Corporation's investment securities at the dates indicated were: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale at December 31, 2016 U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 360,779 $ 8,443 $ 5,564 363,658 U.S. Government-sponsored mortgage-backed securities 313,459 1,904 3,071 312,292 Corporate obligations 31 31 Equity securities 21,820 1,039 20,781 Total available for sale 696,189 10,347 9,674 696,862 Held to maturity at December 31, 2016 U.S. Government-sponsored agency securities 22,619 479 22,140 State and municipal 224,811 3,136 1,796 226,151 U.S. Government-sponsored mortgage-backed securities 360,213 4,956 1,527 363,642 Total held to maturity 607,643 8,092 3,802 611,933 Total Investment Securities $ 1,303,832 $ 18,439 $ 13,476 $ 1,308,795 Available for sale at December 31, 2015 U.S. Government-sponsored agency securities $ 100 $ 4 $ 104 State and municipal 291,730 14,241 $ 60 305,911 U.S. Government-sponsored mortgage-backed securities 342,550 4,234 518 346,266 Corporate obligations 31 31 Equity securities 3,912 3,912 Certificates of deposit 2,176 2,176 Total available for sale 640,499 18,479 578 658,400 Held to maturity at December 31, 2015 State and municipal 219,767 6,982 15 226,734 U.S. Government-sponsored mortgage-backed securities 398,832 7,601 787 405,646 Total held to maturity 618,599 14,583 802 632,380 Total Investment Securities $ 1,259,098 $ 33,062 $ 1,380 $ 1,290,780 Certain investments in debt securities are reported in the financial statements at amounts less than their historical cost. The historical cost of these investments totaled $523,773,000 and $178,964,000 at December 31, 2016 and 2015 , respectively. Total fair value of these investments was $510,297,000 and $177,584,000 , which was approximately 39.1 and 13.9 percent of the Corporation's available for sale and held to maturity investment portfolio at December 31, 2016 and 2015 , respectively. Except as discussed below, management believes the decline in fair value for these securities was temporary. 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 during the period the OTTI is identified. The Corporation’s management has evaluated all securities with unrealized losses for OTTI as of December 31, 2016 . The evaluations are based on the nature of the securities, the extent and duration of the loss and the intent and ability of the Corporation to hold these securities either to maturity or through the expected recovery period. In determining the fair value of the investment securities portfolio, the Corporation utilizes a third party for portfolio accounting services, including market value input, for those securities classified as Level I and Level II in the fair value hierarchy. The Corporation has obtained an understanding of what inputs are being used by the vendor in pricing the portfolio and how the vendor classified these securities based upon these inputs. From these discussions, the Corporation’s management is comfortable that the classifications are proper. The Corporation has gained trust in the data for two reasons: (a) independent spot testing of the data is conducted by the Corporation through obtaining market quotes from various brokers on a periodic basis; and (b) actual gains or loss resulting from the sale of certain securities has proven the data to be accurate over time. Fair value of securities classified as Level 3 in the valuation hierarchy was determined using a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active. U.S. Government-Sponsored Mortgage-Backed Securities The unrealized losses on the Corporation's investment in mortgage-backed securities were a result of interest rate changes. The Corporation 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 Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Corporation does not consider those investments to be other-than-temporarily impaired at December 31, 2016 . As noted in the table above, the mortgage-backed securities portfolio contains unrealized losses of $3,071,000 on forty-six securities and $1,527,000 on twenty-nine securities in the available for sale and held to maturity portfolios, respectively. All these securities are issued by a government-sponsored entity. State and Municipal Securities The unrealized losses on the Corporation's investments in securities of state and political subdivisions were caused by interest rate increases. 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. Because the Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Corporation does not consider those investments to be other-than-temporarily impaired at December 31, 2016 . As noted in the table above, the state and political subdivision securities portfolio contains unrealized losses of $5,564,000 on one hundred eight securities and $1,796,000 on seventy-one securities in the available for sale and held to maturity portfolios, respectively. U.S. Government-Sponsored Agency Securities The unrealized losses on the Corporation's investment in U.S. Government-Sponsored Agency securities were a result of 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 basis of the investments. Because the Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Corporation does not consider those investments to be other-than-temporarily impaired at December 31, 2016 . As noted in the table above, the U.S. Government-Sponsored Agency securities portfolio contains no unrealized losses in the available for sale portfolio, and $479,000 on four securities in the held to maturity portfolio. Equity Securities The unrealized losses on the Corporation's investment in Equity securities were a result of fluctuations in the stock market. Because the Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, the Corporation does not consider those investments to be other-than-temporarily impaired at December 31, 2016 . As noted in the table above, the Equity securities portfolio contains unrealized losses of $1,039,000 on one security in the available for sale portfolio, and no unrealized losses in the held to maturity portfolio. Certain Losses Recognized on Investments Certain debt securities have experienced fair value deterioration due to credit losses and other market factors. The following table provides information about debt securities for which only a credit loss was recognized in income and other losses were recorded in other comprehensive income. Accumulated Credit Losses in Accumulated Credit Losses in 2016 2015 Credit losses on debt securities held: Balance, January 1 $ — $ 500 Reductions for previous other-than-temporary losses realized on securities sold during the year — $ (500 ) Balance, December 31 $ — $ — The following table shows the Corporation’s gross unrealized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position at December 31, 2016 and 2015 : Less than 12 Months 12 Months or Longer Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2016 State and municipal $ 126,593 $ 5,564 $ 126,593 $ 5,564 U.S. Government-sponsored mortgage-backed securities 185,544 3,071 185,544 3,071 Equity securities 18,765 1,039 18,765 1,039 Total Temporarily Impaired Available for Sale Securities 330,902 9,674 330,902 9,674 Temporarily Impaired Held to Maturity Securities at December 31, 2016 U.S. Government-sponsored agency securities 19,121 479 19,121 479 State and municipal 50,897 1,796 50,897 1,796 U.S. Government-sponsored mortgage-backed securities 109,377 1,527 109,377 1,527 Total Temporarily Impaired Held to Maturity Securities 179,395 3,802 179,395 3,802 Total Temporarily Impaired Investment Securities $ 510,297 $ 13,476 $ 510,297 $ 13,476 Less than 12 Months 12 Months or Longer Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2015 State and municipal $ 7,558 $ 60 $ 7,558 $ 60 U.S. Government-sponsored mortgage-backed securities 83,396 445 $ 2,101 $ 73 85,497 518 Total Temporarily Impaired Available for Sale Securities 90,954 505 2,101 73 93,055 578 Temporarily Impaired Held to Maturity Securities at December 31, 2015 State and municipal 1,982 15 1,982 15 U.S. Government-sponsored mortgage-backed securities 69,641 519 12,906 268 82,547 787 Total Temporarily Impaired Held to Maturity Securities 69,641 519 14,888 283 84,529 802 Total Temporarily Impaired Investment Securities $ 160,595 $ 1,024 $ 16,989 $ 356 $ 177,584 $ 1,380 The amortized cost and fair value of securities available for sale and held to maturity at December 31, 2016 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. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at December 31, 2016 Due in one year or less $ 2,703 $ 2,717 $ 2,046 $ 2,047 Due after one through five years 16,359 17,068 61,921 63,193 Due after five through ten years 60,614 62,241 61,606 61,145 Due after ten years 281,234 281,763 121,857 121,906 360,910 363,789 247,430 248,291 U.S. Government-sponsored mortgage-backed securities 313,459 312,292 360,213 363,642 Equity securities 21,820 20,781 Total Investment Securities $ 696,189 $ 696,862 $ 607,643 $ 611,933 Securities with a carrying value of approximately $572,896,000 , $637,358,000 and $449,408,000 were pledged at December 31, 2016 , 2015 and 2014 , respectively, to secure certain deposits and securities sold under repurchase agreements, and for other purposes as permitted or required by law. The book value of securities sold under agreements to repurchase amounted to $145,936,000 at December 31, 2016, and $153,789,000 at December 31, 2015. Gross gains of $3,389,000 , $2,770,000 and $3,581,000 were realized on sales of investment securities in 2016 , 2015 and 2014 , respectively. Gross losses of $100,000 were realized on sales of investment securities in 2015. There were no losses from the sales of investment securities in 2016 or 2014 .

Loans and Allowance

Loans and Allowance	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Loans and Allowance	90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645 December 31, 2015 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,052,275 $ 166 $ 4,634 $ 4,800 $ 1,057,075 Agriculture production financing and other loans to farmers 96,884 827 827 97,711 Real estate loans: Construction 362,084 3,884 736 4,620 366,704 Commercial and farmland 1,786,092 5,552 11,277 16,829 1,802,921 Residential 765,634 6,090 $ 2,061 $ 502 11,818 20,471 786,105 Home equity 344,344 1,433 560 324 1,952 4,269 348,613 Individuals' loans for household and other personal expenditures 73,990 445 56 81 145 727 74,717 Lease financing receivables, net of unearned income 588 588 Other commercial loans 159,324 64 64 159,388 Loans $ 4,641,215 $ 17,570 $ 2,741 $ 907 $ 31,389 $ 52,607 $ 4,693,822 On occasion, borrowers experience declines in income and cash flow. As a result, these borrowers seek to reduce contractual cash outlays including debt payments. Concurrently, in an effort to preserve and protect its earning assets, specifically troubled loans, the Corporation is working to maintain its relationship with certain customers who are experiencing financial difficulty by contractually modifying the borrower's debt agreement with the Corporation. In certain loan restructuring situations, the Corporation may grant a concession to a debtor experiencing financial difficulty, resulting in a trouble debt restructuring. A concession is deemed to be granted when, as a result of the restructuring, the Corporation does not expect to collect all original amounts due, including interest accrued at the original contract rate. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of the collateral is considered in determining whether the principal will be paid. The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods ended December 31, 2016 and 2015 : December 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 410 $ 410 4 Agriculture production financing and other loans to farmers 1,368 1,234 4 Real estate loans: Commercial and farmland 3,978 3,954 7 Residential 1,126 1,183 17 Home Equity 266 244 4 Individuals' loans for household and other personal expenditures 17 10 1 Total $ 7,165 $ 7,035 37 December 31, 2015 Pre-Modification Post-Modification Number Commercial and industrial loans $ 4,111 $ 2,115 7 Real estate loans: Construction 79 80 1 Commercial and farmland 1,281 3,024 3 Residential 200 1,113 10 Home equity 263 242 1 Individuals' loans for household and other personal expenditures 26 27 1 Total $ 5,960 $ 6,601 23 The following tables summarize the recorded investment of troubled debt restructurings as of December 31, 2016 and 2015 , by modification type, that occurred during the periods indicated: December 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 397 $ 397 Agriculture production financing and other farm loans $ 660 $ 12 672 Real estate loans: Commercial and farmland 297 3,456 3,753 Residential 238 928 1,166 Home equity 266 266 Individuals' loans for household and other personal expenditures 9 9 Total $ 1,195 $ 1,215 $ 3,853 $ 6,263 December 31, 2015 Term Rate Combination Total Commercial and industrial loans $ 761 $ 1,053 $ 1,814 Real estate loans: Commercial and farmland 1,231 1,026 2,257 Residential 823 $ 170 45 1,038 Home equity 242 242 Individuals' loans for household and other personal expenditures 27 27 Total $ 2,815 $ 439 $ 2,124 $ 5,378 Loans secured by commercial and farmland real estate made up 56 percent of the post-modification balances of the troubled debt restructured loans that occurred during the twelve months ending December 31, 2016 . The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2016 and 2015 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this schedule, a loan is considered in default if it is 30 or more days past due. Twelve Months Ended December 31, 2016 Number of Loans Recorded Balance Commercial and industrial loans 3 $ 197 Agriculture production financing and other loans to farmers 1 661 Real estate loans: Commercial and farmland 1 343 Residential 1 64 Total 6 $ 1,265 Twelve Months Ended December 31, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 For potential consumer loan restructures, impairment evaluation occurs prior to modification. Any subsequent impairment is typically addressed through the charge off process or a specific reserve in the allowance for loan and lease losses. Consumer troubled debt restructurings are included in the general historical allowance for loan loss at the post modification balance if a specific reserve is not established. Consumer non-accrual and delinquent troubled debt restructurings are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $1,530,000 and $1,391,000 at December 31, 2016 and 2015, respectively. Commercial troubled debt restructured loans risk graded special mention, substandard, doubtful and loss are individually evaluated for impairment under ASC 310. Any resulting specific reserves are included in the allowance for loan losses. Commercial 30 - 89 day delinquent troubled debt restructurings are included in the calculation of the delinquency trend environmental allowance allocation. All commercial non-impaired loans, including non-accrual and 90+ day delinquents, are included in the ASC 450 loss migration analysis." id="sjs-B4">LOANS AND ALLOWANCE The Corporation's primary lending focus is small business and middle market commercial, commercial real estate, residential real estate and consumer, which results in portfolio diversification. The following tables show the composition of the loan portfolio, the allowance for loan losses and certain credit quality aspects, all excluding loans held for sale. Loans held for sale at December 31, 2016 and 2015 , were $2,929,000 and $9,894,000 , respectively. The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the years indicated: December 31, 2016 December 31, 2015 Commercial and industrial loans $ 1,194,646 $ 1,057,075 Agricultural production financing and other loans to farmers 79,689 97,711 Real estate loans: Construction 418,703 366,704 Commercial and farmland 1,953,062 1,802,921 Residential 739,169 786,105 Home equity 418,525 348,613 Individuals' loans for household and other personal expenditures 77,479 74,717 Lease financing receivables, net of unearned income 311 588 Other commercial loans 258,061 159,388 Loans 5,139,645 4,693,822 Allowance for loan losses (66,037 ) (62,453 ) Net Loans $ 5,073,608 $ 4,631,369 Allowance, Credit Quality and Loan Portfolio The Corporation maintains an allowance for loan losses to cover probable credit losses identified during its loan review process. Management believes that the allowance for loan losses is adequate to cover probable losses inherent in the loan portfolio at December 31, 2016 . The process for determining the adequacy of the allowance for loan losses is critical to the Corporation’s financial results. It requires management to make difficult, subjective and complex judgments to estimate the effect of uncertain matters. The allowance for loan losses considers current factors, including economic conditions and ongoing internal and external examinations, and will increase or decrease as deemed necessary to ensure it remains adequate. In addition, the allowance as a percentage of charge offs and nonperforming loans will change at different points in time based on credit performance, portfolio mix and collateral values. The allowance for loan losses is maintained through the provision for loan losses, which is a charge against earnings. The allowance is increased by provision expense and decreased by charge offs less recoveries. All charge offs are approved by the Bank’s senior loan officers or loan committees, depending on the amount of the charge off. The Bank charges off a loan when a determination is made that all or a portion of the loan is uncollectible. The amount provided for loan losses in a given period may be greater than or less than net loan losses experienced during the period, and is based on management’s judgment as to the appropriate level of the allowance for loan losses. The determination of the provision amount is based on management’s ongoing review and evaluation of the loan portfolio, including an internally administered loan "watch" list and independent loan reviews. The evaluation takes into consideration identified credit problems, the possibility of losses inherent in the loan portfolio that are not specifically identified and management’s judgment as to the impact of the current environment and economic conditions on the portfolio. The allowance consists of specific impairment reserves as required by ASC 310-10-35, a component for historical losses in accordance with ASC 450 and the consideration of current environmental factors in accordance with ASC 450. A loan is deemed impaired when, based on current information or events, it is probable that all amounts due of principal and interest according to the contractual terms of the loan agreement will not be collected. The historical loss allocation for loans not deemed impaired according to ASC 450 is the product of the volume of loans within the non-impaired criticized and non-criticized risk grade classifications, each segmented by call code, and the historical loss factor for each respective classification and call code segment. The historical loss factors are based upon actual loss experience within each risk and call code classification. The historical look back period for non-criticized loans looks to the most recent rolling-four-quarter average and aligns with the look back period for non-impaired criticized loans. Each of the rolling four quarter periods used to obtain the average, include all charge offs for the previous twelve-month period, therefore the historical look back period includes seven quarters. The resulting allocation is reflective of current conditions. Criticized loans are grouped based on the risk grade assigned to the loan. Loans with a special mention grade are assigned a loss factor, and loans with a classified grade but not impaired are assigned a separate loss factor. The loss factor computation for this allocation includes a segmented historical loss migration analysis of risk grades to charge off. In addition to the specific reserves and historical loss components of the allowance, consideration is given to various environmental factors to ensure that losses inherent in the portfolio are reflected in the allowance for loan losses. The environmental component adjusts the historical loss allocations for non-impaired loans to reflect relevant current conditions that, in management's opinion, have an impact on loss recognition. Environmental factors that management reviews in the analysis include: national and local economic trends and conditions; trends in growth in the loan portfolio and growth in higher risk areas; levels of, and trends in, delinquencies and non-accruals; experience and depth of lending management and staff; adequacy of, and adherence to, lending policies and procedures including those for underwriting; industry concentrations of credit; and adequacy of risk identification systems and controls through the internal loan review and internal audit processes. In conformance with ASC 805 and ASC 820, loans purchased after December 31, 2008 are recorded at the acquisition date fair value. Such loans are included in the allowance to the extent a specific impairment is identified that exceeds the fair value adjustment on an impaired loan or the historical loss and environmental factor analysis indicates losses inherent in a purchased portfolio exceeds the fair value adjustment on the portion of the purchased portfolio not deemed impaired. At December 31, 2016, the allowance for loan losses was $66,037,000 , an increase of $3,584,000 from the December 31, 2015 balance of $62,453,000 . Net charge offs for the twelve months ended December 31, 2016, were $2,073,000 , an increase of $145,000 from the same period in 2015. The provision for loan losses for the twelve months ended December 31, 2016 was $5,657,000 , an increase of $5,240,000 from the same period in 2015. The determination of the provision for loan losses in any period is based on management’s continuing review and evaluation of the loan portfolio, and its judgment as to the impact of current economic conditions on the portfolio. The following tables summarize changes in the allowance for loan losses by loan segment for the twelve months ended December 31, 2016, 2015 and 2014: Twelve Months Ended December 31, 2016 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Provision for losses 1,876 1,834 432 1,515 5,657 Recoveries on loans 1,806 2,090 369 1,091 5,356 Loans charged off (2,464 ) (2,408 ) (567 ) (1,990 ) (7,429 ) Balances, December 31, 2016 $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Twelve Months Ended December 31, 2015 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2014 $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964 Provision for losses (1,901 ) 1,710 299 310 (1 ) 417 Recoveries on loans 1,911 2,545 352 1,536 6,344 Loans charged off (2,356 ) (1,437 ) (620 ) (3,859 ) (8,272 ) Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Twelve Months Ended December 31, 2014 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2013 $ 27,176 $ 23,102 $ 2,515 $ 15,077 $ 67,870 Provision for losses 3,459 (464 ) 423 (839 ) $ (19 ) 2,560 Recoveries on loans 5,435 3,297 377 1,783 24 10,916 Loans charged off (7,246 ) (6,608 ) (657 ) (2,869 ) (2 ) (17,382 ) Balances, December 31, 2014 $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964 The following tables show the Corporation’s allowance for loan losses and loan portfolio by loan segment for the years indicated: December 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 37 $ 553 $ 298 $ 888 Collectively evaluated for impairment 27,659 23,108 $ 2,923 11,457 $ 2 65,149 Loans acquired with deteriorated credit quality Total Allowance for Loan Losses $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Loan balances: Individually evaluated for impairment $ 4,762 $ 21,358 9 $ 4,450 $ 30,579 Collectively evaluated for impairment 1,520,981 2,315,686 $ 77,470 1,151,396 $ 311 5,065,844 Loans acquired with deteriorated credit quality 6,653 34,721 1,848 43,222 Loans $ 1,532,396 $ 2,371,765 $ 77,479 $ 1,157,694 $ 311 $ 5,139,645 December 31, 2015 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 1,277 $ 243 $ 169 $ 1,689 Collectively evaluated for impairment 25,201 21,753 $ 2,689 10,966 $ 2 60,611 Loans acquired with deteriorated credit quality 149 4 153 Total Allowance for Loan Losses $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Loan balances: Individually evaluated for impairment $ 7,877 $ 16,670 $ 4,020 $ 28,567 Collectively evaluated for impairment 1,298,988 2,096,089 $ 74,717 1,125,316 $ 588 4,595,698 Loans acquired with deteriorated credit quality 7,309 56,866 5,382 69,557 Loans $ 1,314,174 $ 2,169,625 $ 74,717 $ 1,134,718 $ 588 $ 4,693,822 The risk characteristics of the Corporation’s material portfolio segments are as follows: 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 These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Management monitors and evaluates commercial real estate loans based on collateral and risk grade criteria. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Consumer and Residential With respect to residential loans that are secured by 1-4 family residences and are typically owner occupied, the Corporation 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 and credit rating 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. Loans are reclassified to a non-accruing status when, in management’s judgment, the collateral value and financial condition of the borrower do not justify accruing interest. When the interest accrual is discontinued, all unpaid accrued interest is reversed against earnings when considered uncollectable. Payments subsequently received on non-accrual loans are applied to principal. A loan is returned to accrual status when principal and interest are no longer past due and collectability is probable, typically after a minimum of six consecutive months of performance. Payments received on impaired accruing or delinquent loans are applied to interest income as accrued. The following table summarizes the Corporation’s non-accrual loans by loan class for the years indicated: December 31, 2016 December 31, 2015 Commercial and industrial loans $ 1,839 $ 4,634 Agriculture production financing and other loans to farmers 1,329 827 Real estate loans: Construction 73 736 Commercial and farmland 15,754 11,277 Residential 9,523 11,818 Home equity 1,457 1,952 Individuals' loans for household and other personal expenditures 23 145 Total $ 29,998 $ 31,389 Commercial impaired loans include non-accrual loans, loans accounted for under ASC 310-30, and loans risk graded as substandard, doubtful and loss that were still accruing but deemed impaired according to the guidance set forth in ASC 310. Also included in impaired loans are accruing loans that are contractually past due 90 days or more and troubled debt restructurings. 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 may require applying a discount factor to the value. The fair value of real estate is generally based on appraisals by qualified licensed appraisers. The appraisers typically determine the value of the real estate by utilizing an income or market valuation approach. If an appraisal is not available, the fair value may be determined by using a cash flow analysis. Fair value on other collateral such as business assets is typically ascertained by assessing, either singularly or some combination of, asset appraisals, accounts receivable aging reports, inventory listings and or customer financial statements. Both appraised values and values based on borrower’s financial information are discounted as considered appropriate based on age and quality of the information and current market conditions. The following tables show the composition of the Corporation’s commercial impaired loans by loan class for the years indicated: December 31, 2016 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 17,645 $ 10,074 $ 13,393 $ 499 Agriculture production financing and other loans to farmers 757 680 750 3 Real estate loans: Construction 5,946 3,178 3,255 258 Commercial and farmland 67,936 49,731 51,740 2,978 Residential 8,039 4,664 5,410 167 Home equity 82 44 44 Other commercial loans 11 Total $ 100,416 $ 68,371 $ 74,592 $ 3,905 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 $ 691 Real estate loans: Commercial and farmland 4,238 2,985 553 2,989 Residential 65 34 23 38 Total $ 4,963 $ 3,679 $ 612 $ 3,718 Total Impaired Loans $ 105,379 $ 72,050 $ 612 $ 78,310 $ 3,905 December 31, 2015 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 22,151 $ 11,669 $ 12,578 $ 488 Agriculture production financing and other loans to farmers 370 361 439 Real estate loans: Construction 4,551 2,336 3,662 157 Commercial and farmland 95,930 69,024 71,569 3,328 Residential 11,262 7,338 7,926 244 Home equity 297 247 249 Other commercial loans 20 Total $ 134,581 $ 90,975 $ 96,423 $ 4,217 Impaired loans with related allowance: Commercial and industrial loans $ 3,043 $ 2,690 $ 1,247 $ 2,752 $ 38 Agriculture production financing and other loans to farmers 466 466 30 538 Real estate loans: Commercial and farmland 2,144 1,933 392 1,868 Residential 2,300 1,463 173 1,787 Total $ 7,953 $ 6,552 $ 1,842 $ 6,945 $ 38 Total Impaired Loans $ 142,534 $ 97,527 $ 1,842 $ 103,368 $ 4,255 December 31, 2014 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 35,514 $ 18,029 $ 18,711 $ 362 Agriculture production financing and other loans to farmers 26 22 26 Real estate loans: Construction 12,956 9,318 9,837 427 Commercial and farmland 95,856 68,187 70,844 3,389 Residential 10,591 6,839 6,987 119 Home equity 3,590 398 402 Other commercial loans 30 Total $ 158,563 $ 102,793 $ 106,807 $ 4,297 Impaired loans with related allowance: Commercial and industrial loans $ 1,766 $ 1,684 $ 1,055 $ 1,721 $ 40 Agriculture production financing and other loans to farmers 6,777 5,777 400 8,044 1 Real estate loans: Commercial and farmland 7,159 4,971 1,120 4,999 24 Residential 1,001 998 194 1,000 Total $ 16,703 $ 13,430 $ 2,769 $ 15,764 $ 65 Total Impaired Loans $ 175,266 $ 116,223 $ 2,769 $ 122,571 $ 4,362 At December 31, 2015, the commercial impaired loan total of $97,527,000 included $11,365,000 and $1,841,000 in loans acquired from Ameriana and C Financial, respectively. At December 31, 2014, the commercial impaired loan total of $116,223,000 included $17,027,000 in loans acquired from Community. As part of the ongoing monitoring of the credit quality of the Corporation's loan portfolio, management tracks certain credit quality indicators including trends related to: (i) the level of criticized commercial loans, (ii) net charge offs, (iii) non-performing loans and (iv) the general national and local economic conditions. The Corporation utilizes a risk grading of pass, special mention, substandard, doubtful and loss to assess the overall credit quality of large commercial loans. All large commercial credit grades are reviewed at a minimum of once a year for pass grade loans. Loans with grades below pass are reviewed more frequently depending on the grade. A description of the general characteristics of these grades is as follows: • Pass - Loans that are considered to be of acceptable credit quality. • Special Mention - Loans which possess some credit deficiency or potential weakness, which deserves close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Corporation's credit position at some future date. Special mention assets are not adversely classified and do not expose the Corporation to sufficient risk to warrant adverse classification. The key distinctions of this category's classification are that it is indicative of an unwarranted level of risk; and weaknesses are considered “potential”, not “defined”, impairments to the primary source of repayment. Examples include businesses that may be suffering from inadequate management, loss of key personnel or significant customer or litigation. • Substandard - A substandard loan is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified have a well-defined weakness that jeopardizes the liquidation of the debt. They are characterized by the distinct possibility that the Corporation will sustain some loss if the deficiencies are not corrected. Other characteristics may include: o the likelihood that a loan will be paid from the primary source of repayment is uncertain or financial deterioration is underway and very close attention is warranted to ensure that the loan is collected without loss, o the primary source of repayment is gone, and the Corporation is forced to rely on a secondary source of repayment, such as collateral liquidation or guarantees, o loans have a distinct possibility that the Corporation will sustain some loss if deficiencies are not corrected, o unusual courses of action are needed to maintain a high probability of repayment, o the borrower is not generating enough cash flow to repay loan principal; however, it continues to make interest payments, o the Corporation is forced into a subordinated or unsecured position due to flaws in documentation, o loans have been restructured so that payment schedules, terms and collateral represent concessions to the borrower when compared to the normal loan terms, o the Corporation is seriously contemplating foreclosure or legal action due to the apparent deterioration of the loan, and o there is significant deterioration in market conditions to which the borrower is highly vulnerable. • Doubtful - Loans that have all of the weaknesses of those classified as Substandard. However, based on currently existing facts, conditions and values, these weaknesses make full collection of principal highly questionable and improbable. Other credit characteristics may include the primary source of repayment is gone or there is considerable doubt as to the quality of the secondary sources of repayment. The possibility of loss is high, but because of certain important pending factors that may strengthen the loan, loss classification is deferred until the exact status of repayment is known. • Loss – Loans that are considered uncollectible and of such little value that continuing to carry them as an asset is not warranted. Loans will be classified as Loss when it is neither practical or 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 tables summarize the credit quality of the Corporation’s loan portfolio, by loan class for the years indicated. Consumer non-performing loans include accruing consumer loans 90 plus days delinquent and consumer non-accrual loans. The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified date. Loans that evidenced deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected are included in the applicable categories below. December 31, 2016 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,117,545 $ 30,919 $ 46,182 $ 1,194,646 Agriculture production financing and other loans to farmers 30,712 25,273 23,704 79,689 Real estate loans: Construction 398,646 3,490 1,858 $ 14,636 $ 73 418,703 Commercial and farmland 1,811,367 60,028 80,626 1,034 7 1,953,062 Residential 146,251 5,106 6,046 574,054 7,712 739,169 Home equity 7,310 47 516 409,237 1,415 418,525 Individuals' loans for household and other personal expenditures 77,456 23 77,479 Lease financing receivables, net of unearned income 228 83 311 Other commercial loans 257,861 200 258,061 Loans $ 3,769,920 $ 124,863 $ 159,215 $ 1,076,417 $ 9,230 $ 5,139,645 December 31, 2015 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 962,340 $ 48,432 $ 45,984 $ 319 $ 1,057,075 Agriculture production financing and other loans to farmers 77,884 6,665 13,162 97,711 Real estate loans: Construction 345,449 1,271 1,790 $ 18,114 $ 80 366,704 Commercial and farmland 1,679,141 46,442 77,338 1,802,921 Residential 171,576 3,107 10,428 593,533 7,461 786,105 Home equity 8,218 48 600 337,718 2,029 348,613 Individuals' loans for household and other personal expenditures 74,491 226 74,717 Lease financing receivables, net of unearned income 495 93 588 Other commercial loans 159,388 159,388 Loans $ 3,404,491 $ 105,965 $ 149,395 $ 319 $ 1,023,856 $ 9,796 $ 4,693,822 The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated: December 31, 2016 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645 December 31, 2015 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,052,275 $ 166 $ 4,634 $ 4,800 $ 1,057,075 Agriculture production financing and other loans to farmers 96,884 827 827 97,711 Real estate loans: Construction 362,084 3,884 736 4,620 366,704 Commercial and farmland 1,786,092 5,552 11,277 16,829 1,802,921 Residential 765,634 6,090 $ 2,061 $ 502 11,818 20,471 786,105 Home equity 344,344 1,433 560 324 1,952 4,269 348,613 Individuals' loans for household and other personal expenditures 73,990 445 56 81 145 727 74,717 Lease financing receivables, net of unearned income 588 588 Other commercial loans 159,324 64 64 159,388 Loans $ 4,641,215 $ 17,570 $ 2,741 $ 907 $ 31,389 $ 52,607 $ 4,693,822 On occasion, borrowers experience declines in income and cash flow. As a result, these borrowers seek to reduce contractual cash outlays including debt payments. Concurrently, in an effort to preserve and protect its earning assets, specifically troubled loans, the Corporation is working to maintain its relationship with certain customers who are experiencing financial difficulty by contractually modifying the borrower's debt agreement with the Corporation. In certain loan restructuring situations, the Corporation may grant a concession to a debtor experiencing financial difficulty, resulting in a trouble debt restructuring. A concession is deemed to be granted when, as a result of the restructuring, the Corporation does not expect to collect all original amounts due, including interest accrued at the original contract rate. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of the collateral is considered in determining whether the principal will be paid. The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods ended December 31, 2016 and 2015 : December 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 410 $ 410 4 Agriculture production financing and other loans to farmers 1,368 1,234 4 Real estate loans: Commercial and farmland 3,978 3,954 7 Residential 1,126 1,183 17 Home Equity 266 244 4 Individuals' loans for household and other personal expenditures 17 10 1 Total $ 7,165 $ 7,035 37 December 31, 2015 Pre-Modification Post-Modification Number Commercial and industrial loans $ 4,111 $ 2,115 7 Real estate loans: Construction 79 80 1 Commercial and farmland 1,281 3,024 3 Residential 200 1,113 10 Home equity 263 242 1 Individuals' loans for household and other personal expenditures 26 27 1 Total $ 5,960 $ 6,601 23 The following tables summarize the recorded investment of troubled debt restructurings as of December 31, 2016 and 2015 , by modification type, that occurred during the periods indicated: December 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 397 $ 397 Agriculture production financing and other farm loans $ 660 $ 12 672 Real estate loans: Commercial and farmland 297 3,456 3,753 Residential 238 928 1,166 Home equity 266 266 Individuals' loans for household and other personal expenditures 9 9 Total $ 1,195 $ 1,215 $ 3,853 $ 6,263 December 31, 2015 Term Rate Combination Total Commercial and industrial loans $ 761 $ 1,053 $ 1,814 Real estate loans: Commercial and farmland 1,231 1,026 2,257 Residential 823 $ 170 45 1,038 Home equity 242 242 Individuals' loans for household and other personal expenditures 27 27 Total $ 2,815 $ 439 $ 2,124 $ 5,378 Loans secured by commercial and farmland real estate made up 56 percent of the post-modification balances of the troubled debt restructured loans that occurred during the twelve months ending December 31, 2016 . The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2016 and 2015 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this schedule, a loan is considered in default if it is 30 or more days past due. Twelve Months Ended December 31, 2016 Number of Loans Recorded Balance Commercial and industrial loans 3 $ 197 Agriculture production financing and other loans to farmers 1 661 Real estate loans: Commercial and farmland 1 343 Residential 1 64 Total 6 $ 1,265 Twelve Months Ended December 31, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 For potential consumer loan restructures, impairment evaluation occurs prior to modification. Any subsequent impairment is typically addressed through the charge off process or a specific reserve in the allowance for loan and lease losses. Consumer troubled debt restructurings are included in the general historical allowance for loan loss at the post modification balance if a specific reserve is not established. Consumer non-accrual and delinquent troubled debt restructurings are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $1,530,000 and $1,391,000 at December 31, 2016 and 2015, respectively. Commercial troubled debt restructured loans risk graded special mention, substandard, doubtful and loss are individually evaluated for impairment under ASC 310. Any resulting specific reserves are included in the allowance for loan losses. Commercial 30 - 89 day delinquent troubled debt restructurings are included in the calculation of the delinquency trend environmental allowance allocation. All commercial non-impaired loans, including non-accrual and 90+ day delinquents, are included in the ASC 450 loss migration analysis.

Accounting for Certain Loans Ac

Accounting for Certain Loans Acquired in a Purchase	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Accounting for Certain Loans Acquired in a Purchase	ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A PURCHASE The Bank acquired loans in a purchase during the years ended December 31, 2015, 2014, 2013 and 2012. The acquired loans detailed in the tables below are included in Note 5 LOANS AND ALLOWANCE, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. As described in Note 5, loans purchased after December 31, 2008 are recorded at the acquisition date fair value, which could result in a fair value discount or premium. Purchased loans with evidence of credit deterioration since origination and for which it is probable at the date of acquisition that the acquirer will not collect all contractually required principal and interest payments are accounted for under ASC 310-30, Loans Acquired with Deteriorated Credit Quality . The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the nonaccretable portion of the fair value discount or premium. The accretable portion of the fair value discount or premium is the difference between the expected cash flows and the net present value of expected cash flows, with such difference accreted into earnings over the term of the loans. All other loans not accounted for under ASC 310-30 are accounted for under ASC 310-20, which allows the fair value adjustment to be accreted into income over the remaining life of the loans. The Corporation's recent acquisitions are detailed in Note 2, ACQUISTIONS AND DIVESTITURES, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. In addition, the Corporation acquired CFS in November 2013 and certain loans from SCB in February 2012. The information presented in this Note 6 reflects actual amounts resulting from the December 31, 2015 Ameriana transaction; whereas estimates were reported in Note 6 ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A PURCHASE, in the Notes to Consolidated Financial Statements included as Item 8 of the December 31, 2015 Annual Report on Form 10-K. The following tables include the outstanding balance and carrying amount of all acquired loans which are included in the Corporation's balance sheet at December 31, 2016 and December 31, 2015. December 31, 2016 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 8,003 $ 85 $ 2,269 $ 23,327 $ 3,552 $ 37,236 Agricultural production financing and other loans to farmers 1,030 50 1,630 2,710 Real estate loans: Construction 22,017 2,835 4,026 420 29,298 Commercial and farmland 103,075 22,130 36,947 131,895 9,315 303,362 Residential 103,414 44,101 9,363 96,627 4,135 257,640 Home Equity 11,728 7,947 6,326 26,894 11,924 64,819 Individuals' loans for household and other personal expenditures 762 2 147 201 30 1,142 Other commercial loans 1,825 65 1,890 Total $ 250,824 $ 77,100 $ 60,108 $ 279,479 $ 30,586 $ 698,097 Carrying Amount $ 240,053 $ 75,194 $ 56,007 $ 266,845 $ 27,318 $ 665,417 Allowance 265 23 92 380 Carrying Amount Net of Allowance $ 239,788 $ 75,194 $ 55,984 $ 266,753 $ 27,318 $ 665,037 December 31, 2015 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 21,888 $ 104 $ 6,769 $ 52,060 $ 4,620 $ 85,441 Agricultural production financing and other loans to farmers 1,761 1,288 3,049 Real estate loans: Construction 23,365 6,214 10,436 976 40,991 Commercial and farmland 144,514 27,838 49,997 189,372 13,293 425,014 Residential 123,231 55,856 21,886 118,105 6,063 325,141 Home Equity 14,261 9,144 8,231 31,986 13,431 77,053 Individuals' loans for household and other personal expenditures 1,731 10 461 443 48 2,693 Other commercial loans 1,928 72 2,000 Total $ 330,918 $ 99,166 $ 99,541 $ 393,014 $ 38,743 $ 961,382 Carrying Amount $ 319,664 $ 96,829 $ 93,355 $ 373,649 $ 34,092 $ 917,589 Allowance 4 149 153 Carrying Amount Net of Allowance $ 319,664 $ 96,829 $ 93,351 $ 373,500 $ 34,092 $ 917,436 The outstanding balance and related carrying amount of loans acquired and accounted for under ASC 310-30 as of December 31, 2016 were $60.5 million and $43.2 million , respectively; with no required allowance for loan losses. Comparatively, the outstanding balance and related carrying amount as of December 31, 2015 of $95.8 million and $69.6 million , respectively, required an allowance for loan losses and corresponding provision expense of $153,000 . As customer cash flow expectations improve, nonaccretable yield can be reclassified to accretable yield. The accretable yield, or income expected to be collected, and reclassifications from nonaccretable yield, are identified in the tables below. The tables reflect only purchased loans accounted for under ASC 310-30 and not the entire portfolio of purchased loans. Twelve Months Ended December 31, 2016 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Additions Accretion (311 ) (123 ) (1,119 ) (4,268 ) (756 ) (6,577 ) Reclassification from nonaccretable 12 82 858 3,827 393 5,172 Disposals (232 ) (14 ) (11 ) (257 ) Ending balance $ 1,629 $ 73 $ 1,233 $ 736 $ 279 $ 3,950 Twelve Months Ended December 31, 2015 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,122 $ 2,400 $ 868 $ 5,390 Additions $ 2,160 $ 145 2,305 Accretion (31 ) (723 ) (4,050 ) (1,046 ) (5,850 ) Reclassification from nonaccretable 249 2,854 822 3,925 Disposals (140 ) (16 ) (2 ) (158 ) Ending balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Twelve Months Ended December 31, 2014 Community CFS SCB Total Beginning balance $ 4,164 $ 1,388 $ 5,552 Additions $ 2,234 2,234 Accretion (231 ) (4,146 ) (1,062 ) (5,439 ) Reclassification from nonaccretable 119 2,553 577 3,249 Disposals (171 ) (35 ) (206 ) Ending balance $ 2,122 $ 2,400 $ 868 $ 5,390 The following table presents loans acquired during the period ending December 31, 2015, for which it was probable at acquisition that all contractually required payments would not be collected. There were no loans acquired during the period ending December 31, 2016. 2015 Ameriana C Financial Total Contractually required payments receivable at acquisition date $ 23,172 $ 2,632 $ 25,804 Nonaccretable difference 11,592 637 12,229 Expected cash flows at acquisition date 11,580 1,995 13,575 Accretable difference 2,160 145 2,305 Basis in loans at acquisition date $ 9,420 $ 1,850 $ 11,270

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Premises and Equipment	PREMISES AND EQUIPMENT The following table summarizes the Corporation's premises and equipment as of December 31, 2016 and 2015 : 2016 2015 Cost at December 31: Land $ 25,035 $ 26,510 Buildings and Leasehold Improvements 114,444 115,461 Equipment 65,547 64,892 Total Cost 205,026 206,863 Accumulated Depreciation and Amortization (110,594 ) (109,215 ) Net $ 94,432 $ 97,648 The Ameriana acquisition on December 31, 2015 and the C Financial acquisition on April 17, 2015 resulted in additions to premises and equipment of $13,946,000 and $7,290,000 , respectively. Details regarding the acquisitions are discussed in Note 2. ACQUISITIONS AND DIVESTITURES, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. The Corporation is committed under various non-cancelable lease contracts for certain subsidiary office facilities and equipment. Total lease expense for 2016 , 2015 and 2014 was $4,586,000 , $3,456,000 and $3,258,000 , respectively. The future minimum rental commitments required under the operating leases in effect at December 31, 2016 , expiring at various dates through the year 2035 are as follows for the years ending December 31: Future Minimum Rental Commitments 2017 $ 3,298 2018 1,998 2019 1,624 2020 1,388 2021 1,056 After 2021 6,487 Total Future Minimum Obligations $ 15,851

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL The Ameriana acquisition on December 31, 2015 resulted in $38,624,000 of goodwill, of which, $871,000 was recorded during the first quarter of 2016 as a measurement period adjustment. The C Financial acquisition on April 17, 2015 resulted in goodwill of $11,126,000 . On June 12, 2015, the sale of FMIG resulted in a goodwill reduction of $8,474,000 . Details regarding the acquisitions and sale are discussed in Note 2. ACQUISITIONS AND DIVESTITURES, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. No impairment loss was recorded in 2016 or 2015. The Corporation tested goodwill for impairment during 2016 and 2015. In both valuations, the fair value exceeded the Corporation’s carrying value; therefore, it was concluded goodwill is not impaired. For additional details related to impairment testing, see the “GOODWILL” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as Item 7 of this Annual Report on Form 10-K. 2016 2015 Balance, January 1 $ 243,129 $ 202,724 Goodwill acquired 48,879 Goodwill reduction (8,474 ) Measurement period adjustment 871 Balance, December 31 $ 244,000 $ 243,129

Core Deposit and Other Intangib

Core Deposit and Other Intangibles	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Core Deposit and Other Intangibles	CORE DEPOSIT AND OTHER INTANGIBLES Core deposit and other intangibles are recorded on the acquisition date of an entity. During the measurement period, the Corporation may record subsequent adjustments to core deposit and other intangibles for provisional amounts recorded at the acquisition date. The Ameriana acquisition on December 31, 2015 resulted in a core deposit intangible of $5,342,000 , of which, $2,142,000 was recorded as a measurement period adjustment in the first quarter of 2016. The C Financial acquisition on April 17, 2015 resulted in a core deposit intangible of $981,000 . On June 12, 2015, the sale of FMIG resulted in an other intangible reduction of $742,000 . Details regarding the acquisitions and sale are discussed in Note 2. ACQUISITIONS AND DIVESTITURES, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. The carrying basis and accumulated amortization of recognized core deposit and other intangibles are noted below. 2016 2015 Gross carrying amount $ 61,798 $ 58,360 Core deposit intangible and other intangibles acquired 4,181 Measurement period adjustment 2,142 Accumulated amortization (49,074 ) (45,164 ) Core deposit intangible and other intangibles reduction (742 ) Core Deposit and Other Intangibles $ 14,866 $ 16,635 Amortization expense for the years ended December 31, 2016 , 2015 and 2014 , was $3,910,000 , $2,835,000 and $2,445,000 , respectively. Estimated future amortization expense is summarized as follows: Amortization Expense 2017 $ 3,614 2018 2,299 2019 1,914 2020 1,733 2021 1,611 After 2021 3,695 $ 14,866

Deposits

Deposits	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Deposits	DEPOSITS The composition of the deposit portfolio is included in the table below for the years indicated: December 31, 2016 December 31, 2015 Demand deposits $ 2,866,853 $ 2,576,283 Savings deposits 1,560,752 1,518,722 Certificates and other time deposits of $100,000 or more 276,274 323,698 Other certificates and time deposits 471,247 556,476 Brokered deposits 381,372 314,468 Total deposits $ 5,556,498 $ 5,289,647 At December 31, 2016 and 2015 , deposits exceeding the FDIC's Standard Maximum Deposit Insurance Amount of $250,000 were $2.2 billion and $2.1 billion , respectively. At December 31, 2016, the contractual maturities of time deposits are summarized as follows: Certificates and Other Time Deposits 2017 $ 621,205 2018 230,560 2019 137,090 2020 65,396 2021 43,010 After 2021 31,632 $ 1,128,893

Transfers Accounted for as Secu

Transfers Accounted for as Secured Borrowings	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Transfers Accounted for as Secured Borrowings	TRANSFERS ACCOUNTED FOR AS SECURED BORROWINGS The collateral pledged for all repurchase agreements that are accounted for as secured borrowings as of December 31, 2016 and 2015 were: December 31, 2016 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 129,617 1,337 10,253 $ 5,273 $ 146,480 December 31, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 131,537 5,680 8,892 $ 9,216 $ 155,325

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Borrowings	BORROWINGS The following table summarizes the Corporation's borrowings as of December 31, 2016 and 2015: December 31, 2016 December 31, 2015 Federal funds purchased $ 120,349 $ 49,721 Securities sold under repurchase agreements 146,480 155,325 Federal Home Loan Bank advances 298,923 235,652 Subordinated debentures and term loans 128,445 127,846 Total Borrowings $ 694,197 $ 568,544 Securities sold under repurchase agreements consist of obligations of the Bank to other parties and are secured by U.S. Government-Sponsored Enterprise obligations. The maximum amount of outstanding agreements at any month-end during 2016 and 2015 totaled $158,185,000 and $163,128,000 , respectively, and the average of such agreements totaled $145,379,000 and $143,491,000 during 2016 and 2015 , respectively. Contractual maturities of borrowings as of December 31, 2016 , are as follows: Maturities in Years Ending December 31: Federal Funds Purchased Securities Sold Federal Home Subordinated 2017 $ 120,349 $ 146,480 $ 167,068 $ 1,018 2018 26,717 2019 13,828 2020 31,310 2021 25,000 After 2021 35,000 132,012 ASC 805 fair value adjustments at acquisition (4,585 ) $ 120,349 $ 146,480 $ 298,923 $ 128,445 The terms of a security agreement with the FHLB require the Corporation to pledge, as collateral for advances, qualifying first mortgage loans, investment securities and multi-family loans in an amount equal to at least 142 percent of these advances depending on the type of collateral pledged. Advances, with interest rates from 0.60 to 6.81 percent, are subject to restrictions or penalties in the event of prepayment. The total available remaining borrowing capacity from the FHLB at December 31, 2016 , was $291,445,000 . As of December 31, 2016 , the Corporation had $25,000,000 of putable advances with the FHLB. Subordinated Debentures and Term Loans. As of December 31, 2016 and 2015 , subordinated debentures and term loans totaled $128,445,000 and 127,846,000 , respectively. • First Merchants Capital Trust II. The subordinated debenture was entered into on July 2, 2007 for $56,702,000 . On August 10, 2015, the Corporation completed the cancellation of $5 million of subordinated debentures at a gain of $1,250,000 . As of December 31, 2016 , $51,702,000 of subordinated debentures remain outstanding with a maturity date of September 15, 2037. The Corporation could not redeem the debenture prior to September 15, 2012, and redemption is subject to the prior approval of the Board of Governors of the Federal Reserve System, as required by law or regulation. Interest was fixed at 6.495 percent for the period from the date of issuance through September 15, 2012; interest is now an annual floating rate equal to the three-month LIBOR plus 1.56 percent , reset quarterly. Interest is payable in March, June, September and December of each year. The interest rate at December 31, 2016 and 2015 was 2.52 percent and 2.07 percent , respectively. The Corporation holds all of the outstanding common securities of First Merchants Capital Trust II. • Ameriana Capital Trust I. On December 31, 2015 the Corporation acquired Ameriana Capital Trust I in conjunction with its acquisition of Ameriana Bancorp, Inc. The subordinated debentures of Ameriana Capital Trust I were entered into in March 2007 for $10,310,000 and have a maturity of March 2036. Ameriana could not redeem the debenture prior to March 2011, and redemption is subject to the prior approval of the Board of Governors of the Federal Reserve System, as required by law or regulation. The interest rate is equal to the three-month LIBOR plus 1.50 percent , reset quarterly. Interest is payable in March, June, September and December of each year. The interest rate at December 31, 2016 and 2015 was 2.46 percent and 2.01 percent , respectively. The Corporation holds all of the outstanding common securities of Ameriana Capital Trust I. • On November 1, 2013, the Corporation completed the private issuance and sale to four institutional investors of an aggregate of $70 million of debt comprised of (a) 5.00 percent Fixed-to-Floating Rate Senior Notes due 2028 in the aggregate principal amount of $5 million (the "Senior Debt") and (b) 6.75 percent Fixed-to -Floating Rate Subordinated Notes due 2028 in the aggregate principal amount of $65 million (the "Subordinated Debt"). The interest rate on the Senior Debt and Subordinated Debt remains fixed for the first ten ( 10 ) years and will become floating thereafter. Once the rates convert to floating on October 30, 2023, the Senior Debt will have an annual floating rate equal to the three-month LIBOR plus 2.345 percent and the Subordinated Debt will have an annual floating rate equal to the three-month LIBOR plus 4.095 percent . The Corporation has an option to redeem the Subordinated Debt in whole or in part at a redemption price equal to 100 percent of the principal amount of the redeemed Subordinated Notes, plus accrued and unpaid interest to the date of the redemption. The option of redemption is subject to the approval of the Federal Reserve Board. The Corporation has an option to redeem the Senior Debt in whole or in part at a redemption price equal to 100 percent of the principal amount of the redeemed Senior Notes, plus accrued and unpaid interest to the date of the redemption; provided, however, that no Subordinated Notes (as defined in the Issuing and Paying Agency Agreement) may remain outstanding subsequent to any early redemption of Senior Notes. The Subordinated Debt and the Senior Debt options to redeem begin with the interest payment date on October 30, 2023, or on any scheduled interest payment date thereafter. The Senior Debt agreement contains certain customary representations and warranties and financial and negative covenants. As of December 31, 2016 and 2015 the Corporation was in compliance with these covenants. Line of Credit. As of December 31, 2016 , the line of credit was no longer in place. As of December 31, 2015 , there was no outstanding balance on the line of credit. • On April 11, 2014 the Corporation entered into a line of credit agreement with U.S. Bank, N.A. with a maximum borrowing capacity of $20 million . The line of credit matured on April 8, 2016 and the agreement was not renewed. Interest was payable quarterly based on one-month LIBOR plus 2.00 percent . The line of credit had a quarterly facility fee of 0.25 percent on the unused balance. The line of credit agreement contained certain customary representations and warranties and financial and negative covenants.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Risk Management Objective of Using Derivatives The Corporation is exposed to certain risks arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and through the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Corporation’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation’s known or expected cash payments principally related to certain variable-rate liabilities. The Corporation also has derivatives that are a result of a service the Corporation provides to certain qualifying customers, and, therefore, are not used to manage interest rate risk in the Corporation’s assets or liabilities. The Corporation manages a matched book with respect to its derivative instruments offered as a part of this service to its customers in order to minimize its net risk exposure resulting from such transactions. Cash Flow Hedges of Interest Rate Risk The Corporation’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Corporation primarily uses interest rate swaps and interest rate caps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the payment of fixed amounts to a counterparty in exchange for the Corporation receiving variable payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps designated as cash flow hedges involve the receipt of variable amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium. As of December 31, 2016 and 2015 , the Corporation had five interest rate swaps with a notional amount of $56.0 million and one interest rate cap with a notional amount of $13.0 million . The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2016 , $26.0 million of the interest rate swaps and the $13.0 million interest rate cap were used to hedge the variable cash outflows (LIBOR-based) associated with existing trust preferred securities when the outflows converted from a fixed rate to variable rate in September 2012 . In addition, the remaining $30.0 million of interest rate swaps were used to hedge the variable cash outflows (LIBOR-based) associated with three Federal Home Loan Bank advances. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the years ended December 31, 2016 and 2015 , the Corporation did not recognize any ineffectiveness. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Corporation’s variable-rate liabilities. During the next twelve months, the Corporation expects to reclassify $1,001,133 from accumulated other comprehensive income to interest expense. Non-designated Hedges The Corporation does not use derivatives for trading or speculative purposes. Derivatives not designated as hedges are not speculative and result from a service the Corporation provides to certain customers. The Corporation executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that the Corporation executes with a third party, such that the Corporation minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of December 31, 2016 , the notional amount of customer-facing swaps was approximately $292,558,991 . This amount is offset with third party counterparties, as described above. Fair Values of Derivative Instruments on the Balance Sheet The table below presents the fair value of the Corporation’s derivative financial instruments as well as their classification on the Balance Sheet as of December 31, 2016 and December 31, 2015 . Asset Derivatives Liability Derivatives December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015 Balance Sheet Location Fair Balance Sheet Location Fair Balance Sheet Location Fair Balance Sheet Location Fair Derivatives designated as hedging instruments: Interest rate contracts Other Assets $ 15 Other Assets $ 36 Other Liabilities $ 2,182 Other Liabilities $ 2,921 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 6,295 Other Assets $ 4,938 Other Liabilities $ 6,295 Other Liabilities $ 5,149 The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated. Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative 2016 2015 Interest rate products $ (368 ) $ (1,681 ) Effect of Derivative Instruments on the Income Statement The tables below present the effect of the Corporation’s derivative financial instruments on the Income Statement for the years ended December 31, 2016 , 2015 and 2014 . Derivatives Not Location of Gain Amount of Gain (Loss) Recognized in Income on Derivative 2016 2015 2014 Interest rate contracts Other income $ 211 $ (53 ) $ (73 ) Derivatives Designated as Hedging Location of Loss Reclassified from Accumulated Other Comprehensive Income (Effective Portion) Amount of Loss Reclassified from Other Comprehensive Income into Income (Effective Portion) 2016 2015 2014 Interest rate contracts Interest expense $ (1,250 ) $ (1,427 ) $ (1,411 ) The Corporation’s exposure to credit risk occurs because of nonperformance by its counterparties. The counterparties approved by the Corporation are usually financial institutions, which are well capitalized and have credit ratings through Moody’s and/or Standard & Poor’s, at or above investment grade. The Corporation’s control of such risk is through quarterly financial reviews, comparing mark-to-market values with policy limitations, credit ratings and collateral pledging. Credit-Risk-Related Contingent Features The Corporation has agreements with certain of its derivative counterparties that contain a provision where if the Corporation fails to maintain its status as a well/adequately capitalized institution, then the Corporation could be required to terminate or fully collateralize all outstanding derivative contracts. Additionally, the Corporation has agreements with certain of its derivative counterparties that contain a provision where if the Corporation defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Corporation could also be declared in default on its derivative obligations. As of December 31, 2016 , the termination value of derivatives in a net liability position related to these agreements was $3,821,000 . As of December 31, 2016 , the Corporation has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral of $7,516,000 . If the Corporation had breached any of these provisions at December 31, 2016 , it could have been required to settle its obligations under the agreements at their termination value.

Fair Values of Financial Instru

Fair Values of Financial Instruments	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Values of Financial Instruments	FAIR VALUES OF FINANCIAL INSTRUMENTS The Corporation used fair value measurements to record fair value adjustments, to certain assets, and liabilities and to determine fair value disclosures. The accounting guidance defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC 820 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 ASC 820, 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. The Corporation 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). Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability. 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 the Corporation. Unobservable inputs are assumptions based on the Corporation’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 for which there is little or no market activity (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 Corporation considers an input to be significant if it drives 10 percent or more of the total fair value of a particular asset or liability. RECURRING MEASUREMENTS Assets and liabilities are considered to be measured at fair value 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 measured at fair value 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. Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy. Investment Securities Where quoted, market prices are available in an active market and securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include equity securities. 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 agencies, government-sponsored mortgage backs, state and municipal and equity securities. In certain cases where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy and include state and municipal, corporate obligations and equity securities. Level 3 fair value for state and municipal, corporate obligations and equity securities was determined using a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active. Third party vendors compile prices from various sources and may apply such techniques as matrix pricing to determine the value of identical or similar investment securities (Level 2). Matrix pricing is a mathematical technique widely used in the banking industry to value investment securities without relying exclusively on quoted prices for specific investment securities but rather relying on the investment securities’ relationship to other benchmark quoted investment securities. Any investment security not valued based upon the methods above are considered Level 3. Interest Rate Derivative Agreements See information regarding the Corporation’s interest rate derivative products in Note 13. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K. The following table presents the fair value measurements of assets and liabilities recognized in the accompanying balance sheets measured at fair value on a recurring basis and the level within the ASC 820-10 fair value hierarchy in which the fair value measurements fall at December 31, 2016 and 2015 . Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 363,658 358,524 $ 5,134 U.S. Government-sponsored mortgage-backed securities 312,292 312,292 Corporate obligations 31 31 Equity securities 20,781 $ 18,765 2,012 4 Interest rate swap asset 6,295 6,295 Interest rate cap 15 15 Interest rate swap liability 8,477 8,477 Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 104 $ 104 State and municipal 305,911 300,014 $ 5,897 U.S. Government-sponsored mortgage-backed securities 346,266 346,266 Certificates of deposit 2,176 2,176 Corporate obligations 31 31 Equity securities 3,912 3,908 4 Interest rate swap asset 4,938 4,938 Interest rate cap 36 36 Interest rate swap liability 8,070 8,070 LEVEL 3 RECONCILIATION The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying balance sheets using significant unobservable Level 3 inputs for year ended December 31, 2016 and 2015 . Available for Sale Securities For The Year Ended December 31, 2016 December 31, 2015 Beginning Balance $ 5,932 $ 6,646 Included in other comprehensive income (223 ) 199 Principal payments (540 ) (913 ) Ending balance $ 5,169 $ 5,932 There were no gains or losses for the period included in earnings that were attributable to the changes in unrealized gains or losses related to assets or liabilities held at December 31, 2016 or 2015 . TRANSFERS BETWEEN LEVELS There were no transfers in or out of Level 3 during 2016 or 2015. NONRECURRING MEASUREMENTS Following is a description of valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy for year ended December 31, 2016 and 2015 . Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 15,318 $ 15,318 Other real estate owned $ 1,612 $ 1,612 Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 7,066 $ 7,066 Other real estate owned $ 5,529 $ 5,529 Impaired Loans (collateral dependent) Loans for which it is probable that the Corporation 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 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. A portion of the allowance for loan losses is allocated to impaired loans if the value of such loans is deemed to be less than the unpaid balance. If these allocations cause the allowance for loan losses to increase, such increase is reported as a component of the provision for loan losses. Loan losses are charged against the allowance when management believes the uncollectability of the loan is confirmed. During 2016 , certain impaired loans were partially charged off or re-evaluated. 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. Other Real Estate Owned The fair value for impaired loans and other real estate owned is measured based on the value of the collateral securing those loans or real estate and is determined using several methods. The fair value of real estate is generally determined based on appraisals by qualified licensed appraisers. The appraisers typically determine the value of the real estate by utilizing an income or market valuation approach. If an appraisal is not available, the fair value may be determined by using a discounted cash flow analysis. Fair value on other collateral such as business assets is typically ascertained by assessing, either singularly or some combination of, asset appraisals, accounts receivable aging reports, inventory listings and or customer financial statements. Both appraised values and values based on borrower’s financial information are discounted as considered appropriate based on age and quality of the information and current market conditions. UNOBSERVABLE (LEVEL 3) INPUTS The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at December 31, 2016 and 2015 . December 31, 2016 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,134 Discounted cash flow Maturity Call Date 1 month to 20 years Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR Impaired loans (collateral dependent) $ 15,318 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (1%) Other real estate owned $ 1,612 Appraisals Discount to reflect current market conditions 0% - 10% (9%) December 31, 2015 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,897 Discounted cash flow Maturity Call Date 1 month to 15 years Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR Impaired loans (collateral dependent) $ 7,066 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 50% (2%) Other real estate owned $ 5,529 Appraisals Discount to reflect current market conditions 0% - 20% (2%) The following is a discussion of the sensitivity of significant unobservable inputs, the interrelationships between those inputs and other unobservable inputs used in recurring fair value measurement and how those inputs might magnify or mitigate the effect of changes in the unobservable inputs on the fair value measurement. State and Municipal Securities, Corporate Obligations and Equity Securities The significant unobservable inputs used in the fair value measurement of the Corporation's state and municipal securities, corporate obligations and equity securities are premiums for unrated securities and marketability discounts. Significant increases or decreases in either of those inputs in isolation would result in a significantly lower or higher fair value measurement. Generally, changes in either of those inputs will not affect the other input. FAIR VALUE OF FINANCIAL INSTRUMENTS The following table presents estimated fair values of the Corporation's financial instruments and the level within the fair value hierarchy in which the fair value measurements fall at December 31, 2016 and 2015 . 2016 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 127,927 $ 127,927 Interest-bearing time deposits 24,459 24,459 Investment securities available for sale 696,862 18,765 $ 672,928 $ 5,169 Investment securities held to maturity 607,643 597,246 14,687 Loans held for sale 2,929 2,929 Loans 5,073,608 4,933,552 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap asset 6,310 6,310 Interest receivable 26,194 26,194 Liabilities at December 31: Deposits $ 5,556,498 $ 4,427,605 $ 1,111,491 Borrowings: Federal funds purchased 120,349 120,349 Securities sold under repurchase agreements 146,480 146,449 Federal Home Loan Bank advances 298,923 297,465 Subordinated debentures and term loans 128,445 105,930 Interest rate swap liability 8,477 8,477 Interest payable 3,110 3,110 2015 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 102,170 $ 102,170 Interest-bearing time deposits 32,315 32,315 Investment securities available for sale 658,400 $ 652,468 $ 5,932 Investment securities held to maturity 618,599 598,082 34,298 Loans held for sale 9,894 9,894 Loans 4,631,369 4,539,940 Federal Reserve and Federal Home Loan Bank stock 37,633 37,633 Interest rate swap asset 4,974 4,974 Interest receivable 24,415 24,415 Liabilities at December 31: Deposits $ 5,289,647 $ 4,095,004 $ 1,177,142 Borrowings: Federal funds purchased 49,721 49,721 Securities sold under repurchase agreements 155,325 155,325 Federal Home Loan Bank advances 235,652 236,375 Subordinated debentures and term loans 127,846 103,643 Interest rate swap liability 8,070 8,070 Interest payable 3,092 3,092 The following methods were used to estimate the fair value of all other financial instruments recognized in the Consolidated Condensed Balance Sheets at amounts other than fair value. Cash and cash equivalents : The fair value of cash and cash equivalents approximates carrying value. Interest-bearing time deposits : The fair value of interest-bearing time deposits approximates carrying value. Investment securities : Fair value is based on quoted market prices, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities. The fair value of certain Level III securities is estimated using discounted cash flow analysis, using interest rates currently being offered on investments with similar maturities and investment quality. Loans held for sale : The carrying amount approximates fair value due to the short duration between origination and date of sale. Loans: The fair value for loans is estimated using discounted cash flow analysis, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. See Impaired Loans above. Federal Reserve and Federal Home Loan Bank stock : The fair value of Federal Reserve Bank and Federal Home Loan Bank stock is based on the price which it may be resold to the Federal Reserve and Federal Home Loan Bank. Derivative instruments : The fair value of interest rate swaps reflect the estimated amounts that would have been received to terminate these contracts at the reporting date based upon pricing or valuation models applied to current market information. Interest rate caps are valued using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates rose above the strike rate of the caps. The projected cash receipts on the caps are based on an expectation of future interest rates derived from observed market interest rate curves and volatilities. Interest receivable and Interest payable : The fair value of interest receivable/payable approximates carrying value. Deposits: The fair values of noninterest-bearing and interest-bearing demand accounts and savings deposits are equal to the amount payable on demand at the balance sheet date. The carrying amounts for variable rate, fixed-term certificates of deposit approximate their fair values at the balance sheet date. Fair values for fixed-rate certificates of deposit and other time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to a schedule of aggregated expected monthly maturities on such time deposits. Borrowings: The fair value of Federal Funds purchased approximates the carrying amount. The fair value of all other borrowings is estimated using a discounted cash flow calculation, based on current rates for similar debt.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES In the normal course of business there are outstanding commitments and contingent liabilities, such as commitments to extend credit and standby letters of credit, which are not included in the accompanying financial statements. The Corporation's exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit and standby letters of credit is represented by the contractual or notional amount of those instruments. The Bank uses the same credit policies in making such commitments as they do for instruments that are included in the consolidated balance sheets. Financial instruments, whose contract amount represents credit risk as of December 31, were as follows: 2016 2015 Amounts of commitments: Loan commitments to extend credit $ 2,057,878 $ 1,547,048 Standby letters of credit $ 46,010 $ 46,734 Commitments to extend credit are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management's credit evaluation. Collateral held varies, but may include accounts receivable, inventory, property and equipment, and income-producing commercial properties. Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The Corporation and subsidiaries are also subject to claims and lawsuits, which 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 of the Corporation.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table summarizes the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, as of December 31, 2016 and 2015 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 ) Other comprehensive income before reclassifications (9,087 ) (240 ) (470 ) (9,797 ) Amounts reclassified from accumulated other comprehensive income (2,203 ) 813 (1,032 ) (2,422 ) Period change (11,290 ) 573 (1,502 ) (12,219 ) Balance at December 31, 2016 $ 1,035 $ (1,774 ) $ (12,842 ) $ (13,581 ) Balance at December 31, 2014 $ 14,098 $ (2,182 ) $ (13,546 ) $ (1,630 ) Other comprehensive income before reclassifications (37 ) (1,093 ) 2,404 1,274 Amounts reclassified from accumulated other comprehensive income (1,736 ) 928 (198 ) (1,006 ) Period change (1,773 ) (165 ) 2,206 268 Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 ) The following table presents the reclassification adjustments out of accumulated other comprehensive income (loss) that were included in net income in the Consolidated Condensed Statements of Income for the years ended December 31, 2016 , 2015 and 2014 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Year Ended December 31, Details about Accumulated Other Comprehensive Income (Loss) Components 2016 2015 2014 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 3,389 $ 2,670 $ 3,581 Other income - net realized gains on sales of available for sale securities Related income tax expense (1,186 ) (934 ) (1,253 ) Income tax expense $ 2,203 $ 1,736 $ 2,328 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (1,250 ) $ (1,427 ) $ (1,411 ) Interest expense - subordinated debentures and term loans Related income tax benefit 437 499 493 Income tax expense $ (813 ) $ (928 ) $ (918 ) Unrealized gains (losses) on defined benefit plans Amortization of net loss and prior service costs $ 1,588 $ 305 $ 520 Other expenses - salaries and employee benefits Related income tax benefit (expense) (556 ) (107 ) (182 ) Income tax expense $ 1,032 $ 198 $ 338 Total reclassifications for the period, net of tax $ 2,422 $ 1,006 1,748 (1) For additional detail related to unrealized gains (losses) on available for sale securities and related amounts reclassified from accumulated other comprehensive income see Note 4. INVESTMENT SECURITIES. (2) For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see Note 13. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES.

Regulatory Capital and Dividend

Regulatory Capital and Dividends	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Regulatory Capital and Dividends	REGULATORY CAPITAL AND DIVIDENDS Regulatory Capital Capital adequacy is an important indicator of financial stability and performance. The Corporation and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies and are assigned to a capital category. The assigned capital category is largely determined by four ratios that are calculated according to the regulations: total risk-based capital, tier 1 risk-based capital, common equity tier 1 capital, and tier 1 leverage ratios. The ratios are intended to measure capital relative to assets and credit risk associated with those assets and off-balance sheet exposures of the entity. The capital category assigned to an entity can also be affected by qualitative judgments made by regulatory agencies about the risk inherent in the entity's activities that are not part of the calculated ratios. There are five capital categories defined in the regulations, ranging from well capitalized to critically undercapitalized. Classification of a bank in any of the undercapitalized categories can result in actions by regulators that could have a material effect on a bank's operations. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios of total and tier 1 capital to risk-weighted assets, and of tier 1 capital to average assets, or leverage ratio, all of which are calculated as defined in the regulations. Banks with lower capital levels are deemed to be undercapitalized, significantly undercapitalized or critically undercapitalized, depending on their actual levels. The appropriate federal regulatory agency may also downgrade a bank to the next lower capital category upon a determination that the bank is in an unsafe or unsound practice. Banks are required to monitor closely their capital levels and to notify their appropriate regulatory agency of any basis for a change in capital category. Basel III was effective for the Corporation on January 1, 2015. Basel III requires the Corporation and the Bank to maintain minimum amounts and ratio of CET1 capital to risk weighted assets, as defined in the regulation. Under the new Basel III rules, in order to avoid limitations on capital distributions, including dividends, the Corporation must hold a capital conservation buffer above the adequately capitalized CET1 capital to risk-weighted assets ratio. The capital conservation buffer is being phased in from zero percent to 2.50 percent by 2019. As of January 1, 2016, the Corporation is required to hold a capital conservation buffer of 0.625 percent, increasing by that amount each successive year until 2019. Under Basel III, the Corporation and Bank elected to opt-out of including AOCI in regulatory capital. As of December 31, 2016 , the Bank met all capital adequacy requirements to be considered well capitalized. There is no threshold for well capitalized status for bank holding companies. The Corporation's and Bank's actual and required capital ratios as of December 31, 2016 and December 31, 2015 were as follows: Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 851,521 14.21 % $ 479,470 8.00 % N/A N/A First Merchants Bank 800,598 13.30 481,490 8.00 $ 601,862 10.00 % Tier 1 capital to risk-weighted assets First Merchants Corporation $ 720,484 12.02 % $ 359,603 6.00 % N/A N/A First Merchants Bank 734,561 12.20 361,117 6.00 $ 481,490 8.00 % Common equity tier 1 capital to risk-weighted assets First Merchants Corporation $ 665,445 11.10 % $ 269,702 4.50 % N/A N/A First Merchants Bank 734,561 12.20 270,838 4.50 $ 391,210 6.50 % Tier 1 capital to average assets First Merchants Corporation $ 720,484 10.54 % $ 273,456 4.00 % N/A N/A First Merchants Bank 734,561 10.78 272,461 4.00 $ 340,576 5.00 % Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 783,776 14.94 % $ 419,809 8.00 % N/A N/A First Merchants Bank 739,793 13.98 423,242 8.00 $ 529,052 10.00 % Tier 1 capital to risk-weighted assets First Merchants Corporation $ 656,323 12.51 % $ 314,857 6.00 % N/A N/A First Merchants Bank 677,340 12.80 317,431 6.00 $ 423,242 8.00 % Common equity tier 1 capital to risk-weighted assets First Merchants Corporation $ 603,063 11.49 % $ 236,143 4.50 % N/A N/A First Merchants Bank 677,340 12.80 238,074 4.50 $ 343,884 6.50 % Tier 1 capital to average assets First Merchants Corporation $ 656,323 10.85 % $ 242,001 4.00 % N/A N/A First Merchants Bank 677,340 11.22 241,423 4.00 $ 301,779 5.00 % Management believes that all of the above capital ratios are meaningful measurements for evaluating the safety and soundness of the Corporation. Traditionally, the banking regulators have assessed bank and bank holding company capital adequacy based on both the amount and the composition of capital, the calculation of which is prescribed in federal banking regulations. The Federal Reserve focuses its assessment of capital adequacy on a component of Tier 1 capital known as CET1. Because the Federal Reserve has long indicated that voting common shareholders' equity (essentially Tier 1 risk-based capital less preferred stock and non-controlling interest in subsidiaries) generally should be the dominant element in Tier 1 risk-based capital, this focus on CET1 is consistent with existing capital adequacy categories. Tier I regulatory capital consists primarily of total stockholders’ equity and subordinated debentures issued to business trusts categorized as qualifying borrowings, less non-qualifying intangible assets and unrealized net securities gains or losses. Because these measures are not defined in GAAP, they are considered non-GAAP financial measures. Non-GAAP financial measures have inherent limitations, are not required to be uniformly applied, and are not audited. Although these non-GAAP financial measures are frequently used by investors to evaluate a company, they have limitations as analytical tools, and should not be considered in isolation, or as a substitute for analyses of results as reported under GAAP. For a reconciliation of GAAP measures to regulatory measures (non-GAAP), see additional details within the “Capital” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as Item 7 of this Annual Report on Form 10-K. Dividends The Corporation's principal source of funds for dividend payments to shareholders is dividends received from the Bank. Banking regulations limit the maximum amount of dividends that a bank may pay without requesting prior approval of regulatory agencies. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the bank’s retained net income (as defined) for the current year plus those for the previous two years, subject to the capital requirements described above. As of December 31, 2016 , the amount available without prior regulatory approval for 2017 dividends from the Corporation’s subsidiaries (both banking and non-banking) was $97,225,000 . Additionally, the Corporation has a Dividend Reinvestment and Stock Purchase Plan, enabling stockholders to elect to have their cash dividends on all shares automatically reinvested in additional shares of the Corporation’s common stock. In addition, stockholders may elect to make optional cash payments up to an aggregate of $2,500 per quarter for the purchase of additional shares of common stock. The stock is credited to participant accounts at fair market value. Dividends are reinvested on a quarterly basis. Stock Repurchase Program On February 9, 2016, the Board of Directors of the Corporation approved a stock repurchase program of up to $15 million of the outstanding shares of the Corporation's common stock. The shares may be purchased from time to time in open market transactions at prevailing market prices in accordance with federal securities laws. The Corporation is not obligated to purchase any shares under the program, and the program may be discontinued at any time. The actual timing, number and share price of shares purchased under the repurchase program will be determined by the Corporation at its discretion and will depend upon such factors as the market price of the stock, general market and economic conditions and applicable legal requirements.

Loan Servicing

Loan Servicing	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Loan Servicing	LOAN SERVICING Mortgage loans serviced for others are not included in the accompanying consolidated balance sheets. The loans are serviced primarily for the Federal Home Loan Mortgage Corporation, Fannie Mae, and Federal Home Loan Bank of Indianapolis, and the unpaid balances totaled $369,592,000 , $312,204,000 and $254,223,000 at December 31, 2016 , 2015 and 2014 , respectively. The amount of capitalized servicing assets is considered immaterial.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock options and RSAs have been issued to directors, officers and other management employees under the Corporation's 1999 Long-term Equity Incentive Plan and the 2009 Long-term Equity Incentive Plan. The stock options, which have a ten -year life, become 100 percent vested ranging from six months to two years and are fully exercisable when vested. Option exercise prices equal the Corporation's common stock closing price on NASDAQ on the date of grant. RSAs issued to employees and non-employee directors provide for the issuance of shares of the Corporation's common stock at no cost to the holder and generally vest after three years. The RSAs vest only if the employee is actively employed by the Corporation on the vesting date and, therefore, any unvested shares are forfeited. For non-employee directors, the RSA's vest only if the non-employee director remains as an active board member on the vesting date and, therefore, any unvested shares are forfeited. RSAs for employees and non-employee directors retired from the Corporation are either immediately vested at retirement or continue to vest after retirement, depending on the plan under which the shares were granted. Deferred Stock Units ("DSUs") can be credited to non-employee directors who elect to defer payment of compensation under the Corporation's 2008 Equity Compensation Plan for Non-employee Directors. DSUs credited are equal to the restricted shares that the non-employee director would have received under the plan. As of December 31, 2016 , the Corporation did not have any outstanding DSUs. The Corporation’s 2009 ESPP provides eligible employees of the Corporation and its subsidiaries an opportunity to purchase shares of common stock of the Corporation through quarterly offerings financed by payroll deductions. The price of the stock to be paid by the employees shall be equal to 85 percent of the average of the closing price of the Corporation’s common stock on each trading day during the offering period. However, in no event shall such purchase price be less than the lesser of an amount equal to 85 percent of the market price of the Corporation’s stock on the offering date or an amount equal to 85 percent of the market value on the date of purchase. Common stock purchases are made quarterly and are paid through advance payroll deductions up to a calendar year maximum of $25,000 . Compensation expense related to unvested share-based awards is recorded by recognizing the unamortized grant date fair value of these awards over the remaining service periods of those awards, with no change in historical reported fair values and earnings. Awards are valued at fair value in accordance with provisions of share-based compensation guidance and are recognized on a straight-line basis over the service periods of each award. To complete the exercise of vested stock options, RSA’s and ESPP options, the Corporation generally issues new shares from its authorized but unissued share pool. Share-based compensation for the years ended December 31, 2016 , 2015 , and 2014 was $2,600,000 , $2,270,000 , and $2,177,000 , respectively, and has been recognized as a component of salaries and benefits expense in the accompanying CONSOLIDATED STATEMENTS OF INCOME. There were no stock options granted in 2016 or 2015. The estimated fair value of the stock options granted in prior years was calculated using a Black-Scholes option pricing model. The weighted-average grant date fair value was $8.13 for stock options granted during the year ended December 31, 2014 . The Black-Scholes model incorporates assumptions used to value share-based awards. The risk-free rate of interest, for periods equal to the expected life of the option, is based on a U.S. government instrument over a similar contractual term of the equity instrument. Expected price volatility is based on historical volatility of the Corporation’s common stock. In addition, the Corporation generally uses historical information to determine the dividend yield and weighted-average expected life of the options until exercise. Separate groups of employees that have similar historical exercise behavior with regard to option exercise timing and forfeiture rates are considered separately for valuation and attribution purposes. Share-based compensation expense recognized in the CONSOLIDATED STATEMENTS OF INCOME is based on awards ultimately expected to vest and is reduced for estimated forfeitures. Share-based compensation guidance requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods, if actual forfeitures differ from those estimates. Pre-vesting forfeitures were estimated to be approximately 3.8 percent for the year ended December 31, 2016 , based on historical experience. The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense: Years Ended December 31, 2016 2015 2014 Stock and ESPP Options Pre-tax compensation expense $ 76 $ 101 $ 237 Income tax expense (benefit) 18 4 (47 ) Stock and ESPP option expense, net of income taxes $ 94 $ 105 $ 190 Restricted Stock Awards Pre-tax compensation expense $ 2,524 $ 2,169 $ 1,940 Income tax benefit (883 ) (749 ) (679 ) Restricted stock awards expense, net of income taxes $ 1,641 $ 1,420 $ 1,261 Total Share-Based Compensation: Pre-tax compensation expense $ 2,600 $ 2,270 $ 2,177 Income tax benefit (865 ) (745 ) (726 ) Total share-based compensation expense, net of income taxes $ 1,735 $ 1,525 $ 1,451 As of December 31, 2016 , unrecognized compensation expense related to RSAs was $3,527,000 and is expected to be recognized over weighted-average period of 1.39 years . The Corporation did no t have any unrecognized compensation expense related to stock options as of December 31, 2016 . Stock option activity under the Corporation's stock option plans, as of December 31, 2016 , and changes during the year ended December 31, 2016 , were as follows: Number of Weighted-Average Weighted Average Aggregate Outstanding at January 1, 2016 442,012 $ 19.99 Exercised (128,848 ) $ 19.37 Canceled (52,953 ) $ 25.09 Outstanding December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982 Vested and Expected to Vest at December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982 Exercisable at December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982 The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the Corporation's closing stock price on the last trading day of 2016 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their stock options on December 31, 2016 . The amount of aggregate intrinsic value will change based on the fair market value of the Corporation's common stock. The aggregate intrinsic value of stock options exercised during the years ended December 31, 2016 and 2015 was $1,641,000 and $921,000 , respectively. Cash receipts of stock options exercised during 2016 and 2015 were $2,495,000 and $1,461,000 , respectively. The following table summarizes information on unvested RSAs outstanding as of December 31, 2016 : Number of Weighted-Average Unvested RSAs at January 1, 2016 354,504 $ 19.65 Granted 124,563 $ 24.01 Forfeited (9,594 ) $ 21.99 Vested (141,126 ) $ 16.62 Unvested RSAs at December 31, 2016 328,347 $ 22.87 The grant date fair value of ESPP options was estimated at the beginning of the October 1, 2016, quarterly offering period of approximately $23,000 . The ESPP options vested during the three months ending December 31, 2016 , leaving no unrecognized compensation expense related to unvested ESPP options at December 31, 2016 .

Pension and Other Post Retireme

Pension and Other Post Retirement Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Pension and Other Post Retirement Benefit Plans	PENSION AND OTHER POST RETIREMENT BENEFIT PLANS The Corporation’s defined-benefit pension plans cover approximately 19 percent of the Corporation’s employees. In 2005 , the Board of Directors of the Corporation approved the curtailment of the accumulation of defined benefits for future services provided by certain participants in the First Merchants Corporation Retirement Plan. No additional pension benefits have been earned by any employees who had not attained both the age of 55 and accrued at least 10 years of vesting service as of March 1, 2005 . The benefits are based primarily on years of service and employees’ pay near retirement. Contributions are intended to provide not only for benefits attributed to service-to-date, but also for those expected to be earned in the future. The Corporation also maintains post retirement benefit plans that provide health insurance benefits to retirees. The plans allow retirees to be carried under the Corporation’s health insurance plan, generally from ages 55 to 65 . The retirees pay 100 percent of the premiums due for their coverage. The table below sets forth the plans’ funded status and amounts recognized in the consolidated balance sheets at December 31 , using measurement dates of December 31, 2016 and 2015 . 2016 2015 Change in Benefit Obligation: Benefit obligation at beginning of year $ 71,747 $ 80,650 Service cost 9 55 Interest cost 3,273 3,087 Actuarial loss (gain) 2,679 (5,617 ) Benefits paid (5,263 ) (6,428 ) Net transfers in from Ameriana acquisition 11,645 Benefit obligation at end of year $ 84,090 $ 71,747 Change in Plan Assets: Fair value of plan assets at beginning of year $ 71,396 $ 77,139 Actual return on plan assets 6,959 153 Employer contributions 739 532 Benefits paid (5,263 ) (6,428 ) Ameriana acquisition 9,726 End of year 83,557 71,396 Funded status at end of year $ (533 ) $ (351 ) Assets and Liabilities Recognized in the Balance Sheets: Deferred tax asset $ 7,041 $ 7,461 Assets $ 5,028 $ 4,006 Liabilities $ 5,561 $ 4,357 Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost, net of tax, consist of: Accumulated loss $ (12,624 ) $ (13,857 ) Prior service credit (451 ) (305 ) $ (13,075 ) $ (14,162 ) The actuarial (gain) loss recognized in 2016 and 2015 was primarily a result of discount rate assumption fluctuations. Ameriana participated in the Pentegra Defined Benefit Plan for Financial Institutions (the "Pentegra Plan”), an industry-wide, tax-qualified defined-benefit pension plan. The Pentegra Plan operated as a multi-employer plan for accounting purposes and as a multiple employer plan under ERISA and the Internal Revenue Code. On November 20, 2015, Ameriana provided Pentegra a 60 -day written notice of withdrawal as a Participating Employer in the Pentegra Plan. Upon completion of the withdrawal from the Pentegra Plan, the assets and liabilities were merged into the First Merchants Corporation Retirement Plan in 2016. The accumulated benefit obligation for all defined benefit plans was $84,090,000 and $71,747,000 at December 31, 2016 and 2015 , respectively. Information for pension plans with an accumulated benefit obligation in excess of plan assets is included in the table below. December 31, 2016 December 31, 2015 Projected benefit obligation $ 5,561 $ 4,357 Accumulated benefit obligation $ 5,561 $ 4,357 Fair value of plan assets The following table shows the components of net periodic pension costs: December 31, 2016 December 31, 2015 December 31, 2014 Service cost $ 9 $ 55 $ 73 Interest cost 3,273 3,087 3,235 Expected return on plan assets (4,508 ) (4,471 ) (4,467 ) Amortization of prior service costs 79 64 81 Amortization of net loss 1,656 1,722 478 Net periodic pension (benefit) cost $ 509 $ 457 $ (600 ) Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): December 31, 2016 December 31, 2015 December 31, 2014 Net periodic pension (benefit) cost $ 509 $ 457 $ (600 ) Net gain (loss) (228 ) 1,299 (12,203 ) Amortization of loss 1,656 1,722 478 Amortization of prior service cost 79 64 81 Total recognized in other comprehensive income (loss) 1,507 3,085 (11,644 ) Total recognized in net periodic pension cost and other comprehensive income (loss) $ 998 $ 2,628 $ (11,044 ) The estimated net loss and transition obligation for the defined benefit pension plans that will be amortized from accumulated other comprehensive income into net periodic pension cost over the next fiscal year are: December 31, 2016 December 31, 2015 December 31, 2014 Amortization of net loss $ (1,208 ) $ (1,505 ) $ (1,770 ) Amortization of prior service cost (90 ) (61 ) (64 ) Total $ (1,298 ) $ (1,566 ) $ (1,834 ) Significant assumptions include: December 31, 2016 December 31, 2015 December 31, 2014 Weighted-average Assumptions Used to Determine Benefit Obligation: Discount rate 4.20 % 4.50 % 4.00 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % Weighted-average Assumptions Used to Determine Cost: Discount rate 4.50 % 4.00 % 4.80 % Expected return on plan assets 6.00 % 6.00 % 6.00 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % At December 31, 2016 and 2015 , the Corporation based its estimate of the expected long-term rate of return on analysis of the historical returns of the plans and current market information available. The plans’ investment strategies are to provide for preservation of capital with an emphasis on long-term growth without undue exposure to risk. The assets of the plans’ are invested in accordance with the plans’ Investment Policy Statement, subject to strict compliance with ERISA and any other applicable statutes. The plans’ risk management practices include semi-annual evaluations of investment managers, including reviews of compliance with investment manager guidelines and restrictions; ability to exceed performance objectives; adherence to the investment philosophy and style; and ability to exceed the performance of other investment managers. The evaluations are reviewed by management with appropriate follow-up and actions taken, as deemed necessary. The Investment Policy Statement generally allows investments in cash and cash equivalents, real estate, fixed income debt securities and equity securities, and specifically prohibits investments in derivatives, options, futures, private placements, short selling, non-marketable securities and purchases of individual non-investment grade bonds. At December 31, 2016 , the maturities of the plans’ debt securities ranged from 15 days to 8.03 years , with a weighted average maturity of 3.97 years . At December 31, 2015 , the maturities of the plans’ debt securities ranged from 15 days to 9.04 years , with a weighted average maturity of 4.47 years . The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid as of December 31, 2016 . The minimum contribution required in 2017 will likely be zero but the Corporation may decide to make a discretionary contribution during the year. 2017 $ 5,756 2018 5,644 2019 5,802 2020 5,688 2021 5,557 After 2021 27,118 $ 55,565 Plan assets are re-balanced quarterly. At December 31, 2016 and 2015 , plan assets by category are as follows: December 31, 2016 December 31, 2015 Actual Target Actual Target Cash and cash equivalents 4.5 % 3.0 % 2.2 % 2.0 % Equity securities 55.8 55.0 58.1 60.0 Debt securities 37.7 40.0 37.4 36.0 Alternative investments 2.0 2.0 2.3 2.0 100.0 % 100.0 % 100.0 % 100.0 % The Savings Plan, a Section 401(k) qualified defined contribution plan, was amended on March 1, 2005 to provide enhanced retirement benefits, including employer and matching contributions, for eligible employees of the Corporation and its subsidiaries. The Corporation matches employees’ contributions primarily at the rate of 50 percent for the first 6 percent of base salary contributed by participants. Beginning in 2005 , employees who have completed 1000 hours of service and are an active employee on the last day of the year receive an additional retirement contribution after year-end. Employees hired after January 1, 2010 do not participate in the additional retirement contribution. Effective January 1, 2013, the additional retirement contribution was fixed at 2 percent. Full vesting occurs after five years of service. The Corporation’s expense for the Savings Plan, including the additional retirement contribution, was $3,441,000 , $3,526,000 and $3,396,000 for 2016 , 2015 and 2014 , respectively. The Corporation maintains post retirement benefit plans that provide health insurance benefits to retirees. The plans allow retirees to be carried under the Corporation’s health insurance plan, generally from ages 55 to 65 . The retirees pay 100 percent of the premiums due for their coverage. The Corporation elected to terminate this plan effective December 31, 2017. As a result of the termination, the Corporation recognized a curtailment gain of $2,157,000 as a component of salaries and benefits expense in the accompanying CONSOLIDATED STATEMENTS OF INCOME. The obligations payable under the plans totaled $54,000 and $1,403,000 at December 31, 2016 and 2015 , respectively. Post retirement plan expense totaled $(2,437,000) , $(127,000) and $97,000 for the years ending December 31, 2016 , 2015 and 2014 , respectively. Pension Plan Assets Following is a description of the valuation methodologies used for pension plan assets measured at fair value on a recurring basis, as well as the general classification of pension plan assets pursuant to the valuation hierarchy. Where quoted market prices are available in an active market, plan assets are classified within Level 1 of the valuation hierarchy. Level 1 plan assets total $64,064,000 and include cash and cash equivalents, common stocks, mutual funds and corporate bonds and notes. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of plan assets with similar characteristics or discounted cash flows. Level 2 plan assets total $19,493,000 and include governmental agencies, taxable municipals, common collective trust investments (which are classified below as Party-in-Interest investments -- common bond fund and common equity fund) and certificates of deposit. In certain cases where Level 1 or Level 2 inputs are not available, plan assets are classified within Level 3 of the hierarchy. There are no assets classified within Level 3 of the hierarchy at December 31, 2016 and 2015 . Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 3,778 $ 3,778 Corporate Bonds and Notes 10,646 10,646 Government Agency and Municipal Bonds and Notes 6,855 $ 6,855 Certificates of Deposit 1,268 1,268 Party-in-Interest Investments Common Stock 2,278 2,278 Common Bond Fund 4,744 4,744 Common Equity Fund 6,626 6,626 Mutual Funds Taxable Bond 7,974 7,974 Large Cap Equity 19,611 19,611 Mid Cap Equity 10,304 10,304 Small Cap Equity 4,680 4,680 International Equity 3,093 3,093 Specialty Alternative Equity 1,700 1,700 $ 83,557 $ 64,064 $ 19,493 Fair Value Measurements Using Quoted Prices in Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 1,608 $ 1,608 Corporate Bonds and Notes 9,113 9,113 Government Agency and Municipal Bonds and Notes 6,993 $ 6,993 Certificates of Deposit 1,511 1,511 Party-in-Interest Investments Common Stock 1,538 1,538 Common Bond Fund 4,647 4,647 Common Equity Fund 5,812 5,812 Mutual Funds Taxable Bond 4,536 4,536 Large Cap Equity 18,528 18,528 Mid Cap Equity 8,537 8,537 Small Cap Equity 3,578 3,578 International Equity 3,353 3,353 Specialty Alternative Equity 1,642 1,642 $ 71,396 $ 52,433 $ 18,963

Income Tax

Income Tax	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Tax	INCOME TAX The reconciliation between income tax expense expected at the U.S. federal statutory tax rate and the reported income tax expense is summarized in the following table for years ended December 31, 2016 , 2015 , 2014 : 2016 2015 2014 Reconciliation of Federal Statutory to Actual Tax Expense: Federal Statutory Income Tax at 35% $ 38,031 $ 31,867 $ 28,800 Tax-exempt Interest Income (8,749 ) (7,083 ) (5,148 ) Basis Difference on Sale of Insurance Subsidiary 2,252 Stock Compensation 27 34 36 Earnings on Life Insurance (1,486 ) (1,012 ) (1,271 ) Tax Credits (564 ) (583 ) (911 ) Other 350 190 617 Income Tax Expense $ 27,609 $ 25,665 $ 22,123 Income tax expense consists of the following components for the years ended December 31, 2016 , 2015 , 2014 : 2016 2015 2014 Income Tax Expense for the Year Ended December 31: Currently Payable: Federal $ 18,998 $ 21,221 $ 7,075 State Deferred: Federal 8,233 3,952 14,538 State 378 492 510 Income Tax Expense $ 27,609 $ 25,665 $ 22,123 Significant components of the net deferred tax assets (liabilities) resulting from temporary differences were as follows at December 31, 2016 and 2015 : 2016 2015 Deferred Tax Asset at December 31: Assets: Differences in Accounting for Loan Losses $ 26,315 $ 25,867 Differences in Accounting for Loan Fees 1,918 762 Differences in Accounting for Loans and Securities 5,689 9,359 Deferred Compensation 3,471 5,100 Difference in Accounting for Pensions and Other Employee Benefits 83 2,247 Federal & State Income Tax Loss Carryforward and Credits 16,643 23,737 Other 4,210 9,310 Total Assets 58,329 76,382 Liabilities: Differences in Depreciation Methods 8,216 7,742 State Income Tax 237 591 Net Unrealized Gain on Securities Available for Sale 557 6,636 Gain on FDIC Modified Whole Bank Transaction 1,126 1,405 Other 623 717 Total Liabilities 10,759 17,091 Net Deferred Tax Asset Before Valuation Allowance 47,570 59,291 Valuation allowance: Beginning Balance (15,736 ) (17,568 ) Decrease/(Increase) During the Year 5,921 1,832 Ending Balance (9,815 ) (15,736 ) Net Deferred Tax Asset $ 37,755 $ 43,555 The $5,800,000 decrease in the Corporation’s net deferred tax asset was due the combination of a decrease in deferred tax assets offset by a decrease in deferred tax liabilities. The largest deferred tax asset decreases were associated with accounting for loans, other real estate owned, federal net operating loss carryforwards, and pensions and other employee benefits of $3,670,000 , $2,592,000 , $2,308,000 , and $2,164,000 , respectively. The deferred tax asset decreases were partially offset by a decline in the deferred tax liability associated with the accounting for unrealized gains on available for sale securities of $6,079,000 . As of December 31, 2016 , the Corporation has approximately $91,143,000 of state NOL carryforwards available to offset future state taxable income, which will expire beginning in 2020 . These NOL carryforwards along with normal timing differences between book and tax result in total state deferred tax assets of $10,491,000 . Management believes it is more likely than not that the benefit from certain of these state NOL carryforwards and certain other state deferred tax assets will not be fully realized. In recognition of this risk, the Corporation has recorded a valuation allowance of $9,815,000 against its state deferred tax assets. The Corporation has additional paid-in capital that is considered restricted resulting from the acquisitions of CFS and Ameriana of approximately $13,393,000 and $11,883,000 , respectively. CFS and Ameriana qualified as banks under provisions of the Internal Revenue Code which permitted them to deduct from taxable income an allowance for bad debts which differed from the provision for losses charged to income. No provision for income taxes had been provided. If in the future this portion of additional paid-in capital is distributed, or the Corporation no longer qualifies as a bank for income tax purposes, income taxes may be imposed at the then applicable tax rates. The unrecorded deferred tax liability at December 31, 2016 , would have been approximately $8,847,000 . The Corporation or one of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. The Corporation is generally no longer subject to U.S. federal, state and local income tax examinations by tax authorities for tax years before 2013 .

Net Income Per Share

Net Income Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Net Income Per Share	NET INCOME PER SHARE Basic net income per share is computed by dividing net income by the weighted-average shares outstanding during the reporting period. Diluted net income per share is computed by dividing net income by the combination of all dilutive common share equivalents, comprised of shares issuable under the Corporation’s share-based compensation plans, and the weighted-average shares outstanding during the reporting period. Dilutive common share equivalents include the dilutive effect of in-the-money share-based awards, which are calculated based on the average share price for each period using the treasury stock method. Under the treasury stock method, the exercise price of share-based awards, the amount of compensation expense, if any, for future service that the Corporation has not yet recognized, and the amount of estimated tax benefits that would be recorded in additional paid-in capital when share-based awards are exercised, are assumed to be used to repurchase common stock in the current period. The following table reconciles basic and diluted net income per share for the years indicated: 2016 2015 2014 Weighted-Average Shares Weighted-Average Shares Weighted-Average Shares Basic net income per share: Net income available to common stockholders $ 81,051 40,767,343 $ 1.99 $ 65,384 37,816,399 $ 1.73 $ 60,162 36,266,356 $ 1.66 Effect of dilutive stock options and warrants 245,790 271,834 288,253 Diluted net income per share: Net income available to common stockholders $ 81,051 41,013,133 $ 1.98 $ 65,384 38,088,233 $ 1.72 $ 60,162 36,554,609 $ 1.65 Options to purchase 51,949 , 286,119 , and 543,514 shares of common stock with weighted average exercise prices of $19.26 , $19.99 , and $20.99 at December 31, 2016 , 2015 and 2014 respectively, were excluded from the computation of diluted net income per share because the options exercise price was greater than the average market price of the common stock.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) The following table sets forth certain quarterly results for the years ended December 31, 2016 and 2015 : 2016 2015 First Second Third Fourth First Second Third Fourth Interest income $ 61,227 $ 62,704 $ 64,376 $ 65,005 $ 52,944 $ 55,202 $ 56,538 $ 56,514 Interest expense 6,772 6,742 6,694 6,631 5,968 6,171 6,215 6,440 Net interest income 54,455 55,962 57,682 58,374 46,976 49,031 50,323 50,074 Provision for loan losses 550 790 1,900 2,417 417 Net interest income after provision for loan losses 53,905 55,172 55,782 55,957 46,976 48,614 50,323 50,074 Non-interest income 15,837 16,385 16,861 16,120 15,399 24,106 16,332 14,031 Non-interest expense 46,475 44,835 44,115 41,934 40,369 45,896 43,031 45,510 Income before income tax expense 23,267 26,722 28,528 30,143 22,006 26,824 23,624 18,595 Income tax expense 5,574 6,716 7,469 7,850 5,834 8,856 6,557 4,418 Net income available to common stockholders $ 17,693 $ 20,006 $ 21,059 $ 22,293 $ 16,172 $ 17,968 $ 17,067 $ 14,177 Basic EPS $ 0.43 $ 0.50 $ 0.51 $ 0.55 $ 0.43 $ 0.47 $ 0.46 $ 0.37 Diluted EPS $ 0.43 $ 0.49 $ 0.51 $ 0.55 $ 0.43 $ 0.47 $ 0.45 $ 0.37 Average Shares Outstanding: Basic 40,690,573 40,751,720 40,779,423 40,846,650 37,709,883 37,793,448 37,850,827 37,908,873 Diluted 40,916,972 40,969,111 41,025,784 41,124,179 38,000,074 38,043,359 38,118,199 38,190,694

Condensed Financial Information

Condensed Financial Information (parent company only)	12 Months Ended
	Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information (parent company only)	CONDENSED FINANCIAL INFORMATION (parent company only) Presented below is condensed financial information as to financial position, results of operations, and cash flows of the Corporation. Condensed Balance Sheets December 31, 2016 December 31, 2015 Assets Cash $ 31,944 $ 43,622 Investment in subsidiaries 978,291 932,372 Investment securities 18,765 Premises and equipment 1,260 1,361 Interest receivable 47 47 Goodwill 448 448 Cash surrender value of life insurance 1,082 1,041 Tax asset, deferred and receivable 521 2,024 Other assets 5,274 5,195 Total assets $ 1,037,632 $ 986,110 Liabilities Subordinated debentures and term loans $ 127,427 $ 127,663 Interest payable 880 873 Other liabilities 7,668 7,065 Total liabilities 135,975 135,601 Stockholders' equity 901,657 850,509 Total liabilities and stockholders' equity $ 1,037,632 $ 986,110 Condensed Statements of Income and Comprehensive Income December 31, 2016 December 31, 2015 December 31, 2014 Income Dividends from subsidiaries $ 33,546 $ 39,032 $ 53,231 Gain on the sale of insurance subsidiary 8,265 Gain on cancellation of subordinated debentures 1,250 Other income 143 197 538 Total income 33,689 48,744 53,769 Expenses Interest expense 7,185 6,661 6,616 Salaries and employee benefits 639 3,023 3,128 Net occupancy and equipment expenses 832 464 442 Other outside services 967 1,455 458 Professional services 279 636 409 Other expenses (470 ) 1,234 1,132 Total expenses 9,432 13,473 12,185 Income before income tax benefit (expense) and equity in undistributed income of subsidiaries 24,257 35,271 41,584 Income tax benefit (expense) 3,243 (974 ) 3,999 Income before equity in undistributed income of subsidiaries 27,500 34,297 45,583 Equity in undistributed (distributions in excess of) income of subsidiaries 53,551 31,087 14,579 Net income available to common stockholders $ 81,051 $ 65,384 $ 60,162 Net income $ 81,051 $ 65,384 $ 60,162 Other comprehensive income (loss) (12,219 ) 268 4,780 Comprehensive income $ 68,832 $ 65,652 $ 64,942 Condensed Statement of Cash Flows Year Ended December 31, 2016 2015 2014 Cash Flow From Operating Activities: Net income $ 81,051 $ 65,384 $ 60,162 Adjustments to Reconcile Net Income to Net Cash: Share-based compensation 1,166 843 887 Distributions in excess of (equity in undistributed) income of subsidiaries (53,551 ) (31,087 ) (14,579 ) Gain on sale of insurance subsidiary (8,265 ) Gain on cancellation of subordinated debentures (1,250 ) Net Change in: Other assets 833 (441 ) 2,425 Other liabilities 849 (1,486 ) 1,466 Investment in subsidiaries - operating activities (1,938 ) 197 (4,517 ) Net cash provided by operating activities 28,410 23,895 45,844 Cash Flow From Investing Activities: Purchase of securities available for sale (19,804 ) Net cash paid in acquisition (14,500 ) (12,832 ) Proceeds from business divestitures 16,000 Other 575 Net cash provided (used) in investing activities (19,804 ) 2,075 (12,832 ) Cash Flow From Financing Activities: Cash dividends (22,203 ) (15,654 ) (10,694 ) Repayment of borrowings (3,750 ) Proceeds from issuance of long-term debt Preferred stock redemption under small business lending fund Stock issued under employee benefit plans 462 460 478 Stock issued under dividend reinvestment and stock purchase plan 835 661 523 Stock options exercised 2,602 1,531 564 Stock redeemed (1,980 ) (1,640 ) (1,067 ) Net cash used by financing activities (20,284 ) (18,392 ) (10,196 ) Cash, beginning of the year 43,622 36,044 13,228 Cash, end of year $ 31,944 $ 43,622 $ 36,044

Accounting Matters

Accounting Matters	12 Months Ended
	Dec. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Accounting Matters	ACCOUNTING MATTERS FASB Accounting Standards Update No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment Summary - The FASB has issued Accounting Standards Update (ASU) No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. To simplify the subsequent measurement of goodwill, the amendments eliminate Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments should be applied on a prospective basis. The nature of and reason for the change in accounting principle should be disclosed upon transition. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. A public business entity that is not an SEC filer should adopt the amendments for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2020. All other entities, including not-for-profit entities, which adopt the amendments should do so for their annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2021. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business Summary - The FASB has issued Accounting Standards Update (ASU) No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business, clarifying the definition of a business. The amendments affect all companies and other reporting organizations that must determine whether they have acquired or sold a business. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The amendments are intended to help companies and other organizations evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments provide a more robust framework to use in determining when a set of assets and activities is a business. They also provide more consistency in applying the guidance, reduce the costs of application, and make the definition of a business more operable. For public companies, the amendments are effective for annual periods beginning after December 15, 2017, including interim periods within those periods. For all other companies and organizations, the amendments are effective for annual periods beginning after December 15, 2018, and interim periods within annual periods beginning after December 15, 2019. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Summary - The FASB has issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This new guidance was issued to address concerns that current generally accepted accounting principles (GAAP) restricts the ability to record credit losses that are expected, but do not yet meet the “probable” threshold by replacing the current “incurred loss” model for recognizing credit losses with an “expected life of loan loss” model referred to as the Current Expected Credit Loss (CECL) model. Under the CECL model, certain financial assets carried at amortized cost, such as loans held for investment and held-to-maturity debt securities, are required to be presented at the net amount expected to be collected. The measurement of expected credit losses is to be based on information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. This measurement will take place at the time the financial asset is first added to the balance sheet and periodically thereafter. This differs significantly from the “incurred loss” model required under current GAAP, which delays recognition until it is probable a loss has been incurred. The change could materially affect how the allowance for loan losses is determined and cause a charge to earnings through the provision for loan losses. Such would adversely affect the financial condition of the Corporation. The ASU is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The impact of CECL model implementation is being evaluated, but it’s expected a one-time cumulative-effect adjustment to the allowance for loan losses will be recognized in retained earnings on the consolidated balance sheet as of the beginning of the first reporting period in which the new standard is effective, as is consistent with regulatory expectations set forth in interagency guidance issued at the end of 2016. The magnitude of any such adjustment or the overall impact of the new standard on financial condition or results of operations cannot yet be determined. FASB Accounting Standards Update No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting Summary - The amendments in ASU 2016-09 simplify several aspects of accounting for employee share-based payments including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some areas of the simplification apply only to nonpublic entities. The new guidance will require all income tax effects of awards to be recognized as income tax expense or benefit in the income statement when the awards vest or are settled and additional paid in capital pools will be eliminated. The guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity. Companies will be required to account for forfeitures of share-based payments by recognizing forfeitures of awards as they occur or estimating the number of awards expected to be forfeited and adjusting the estimate when it is likely to change, as currently required, through an accounting policy election. The guidance will increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer's income tax withholding obligation. The guidance requires an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on the statement of cash flows. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption will be permitted in any interim or annual period for which financial statements have not yet been issued or have not been made available for issuance, however all of the guidance must be adopted in the same period. If early adoption is elected in an interim period, any adjustments should be reflected as of the beginning of the annual period that includes that interim period. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2016-02 - Leases (Topic 842) Summary - The FASB has issued its new lease accounting guidance in Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842). Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: • A lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and • A right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. Certain targeted improvements were made to align, where necessary, lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The new lease guidance simplified the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. Public business entities should apply the amendments in ASU 2016-02 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years (i.e., January 1, 2019, for a calendar year entity). Nonpublic business entities should apply the amendments for fiscal years beginning after December 15, 2019 (i.e., January 1, 2020, for a calendar year entity), and interim periods within fiscal years beginning after December 15, 2020. Early application is permitted for all public business entities and all nonpublic business entities upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The impact of this ASU is being evaluated, but it’s expected a one-time adjustment to the Corporation’s other assets and other liabilities on the consolidated balance sheet will occur as of the beginning of the first reporting period in which the new standard is effective. The magnitude of any such adjustment or the overall impact of the new standard on financial condition, results of operations and regulatory capital cannot yet be determined. FASB Accounting Standards Updates No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities Summary - The FASB has issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance is intended to improve the recognition and measurement of financial instruments. The ASU affects public and private companies, not-for-profit organizations, and employee benefit plans that hold financial assets or owe 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. For private companies, not-for-profit organizations, and employee benefit plans, the new guidance becomes effective for fiscal years beginning after December 15, 2018, and for interim periods within fiscal years beginning after December 15, 2019. 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 this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Updates No. 2014-09, Revenue from Contracts with Customers (Topic 606): Summary - The FASB has issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) . The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. ASU 2014-09 creates a single, principle-based revenue recognition framework and will require entities to apply significantly more judgment and expanded disclosures surrounding revenue recognition. The core principle requires and entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those good or services. ASU 2014-09 applies to contracts with customers to provide goods and services, with certain exclusion such as lease contracts, financing arrangements and financial instruments. The amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2017. Early adoption is permitted for annual reporting periods beginning after December 15, 2016. The Corporation’s revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. ASU 2014-09 could require the Corporation to change how certain recurring revenue streams are recognized; however, these changes are not expected to have a significant impact on the Corporation’s financial statements. The impact of ASU 2014-09 on components of non-interest income is still being evaluated. Adoption of the standard is required in the first quarter of 2018 with a cumulative effect adjustment to opening retained earnings if such adjustment is deemed to be significant.

General Litigation

General Litigation	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
General Litigation	GENERAL LITIGATION The Corporation 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 flow of the Corporation.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS The Arlington Bank Merger On January 25, 2017, the Corporation, the Bank and The Arlington Bank, an Ohio savings bank ("Arlington Bank"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which Arlington Bank will, subject to the terms and conditions of the merger agreement, merge with and into the Bank, whereupon the separate corporate existence of Arlington Bank will cease and the Bank will survive. Based on the closing price of the Corporation's common stock on January 24, 2017 of $36.46 per share, the transaction value is estimated at approximately $75.8 million . The transaction is expected to be a tax-free stock exchange for Arlington Bank's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to Arlington Bank's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the second quarter of 2017. Arlington Bank's total assets as of December 31, 2016 were $309 million . Independent Alliance Banks, Inc. Merger On February 17, 2017, the Corporation and Independent Alliance Banks, Inc., an Indiana corporation ("IALB"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which IALB will, subject to the terms and conditions of the merger agreement, merge with and into the Corporation, whereupon the separate corporate existence of IALB will cease and the Corporation will survive. Immediately following the merger, IALB's wholly-owned subsidiary, iAB Financial Bank, shall be merged with and into the Bank, with the Bank continuing as the surviving bank. On November 21, 2016, the Corporation purchased 495,112 shares or 12.1% of IALB's outstanding common stock from an IALB shareholder for $19.8 million . Based on the closing price of the Corporation's common stock on February 16, 2017 of $42.10 per share, the transaction value for the remaining shares of common stock, not owned by the Corporation, is approximately $251.3 million . The transaction is expected to be a tax-free stock exchange for IALB's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to IALB's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the third quarter of 2017. IALB's total assets as of December 31, 2016 were $1.1 billion .

Nature of Operations and Summ37

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Accounting	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Consolidation	CONSOLIDATION of the Corporation's financial statements include the accounts of the Corporation and all its subsidiaries, after elimination of all material intercompany transactions.
Business Combinations	BUSINESS COMBINATIONS are accounted for under the acquisition method of accounting. Under the acquisition method, assets and liabilities of the business acquired are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value of the net tangible and intangible assets acquired recorded as goodwill. Results of operations of the acquired business are included in the income statement from the date of acquisition.
Available for Sale Securities	AVAILABLE FOR SALE SECURITIES are recorded at fair value on a recurring basis with the unrealized gains and losses, net of applicable income taxes, recorded in other comprehensive income. Realized gains and losses are recorded in earnings and the prior fair value adjustments are reclassified within stockholders' equity. Gains and losses on sales of securities are determined on the specific-identification method. Amortization of premiums and accretion of discounts are recorded as interest income from securities. Available for sale and held to maturity securities are evaluated for OTTI at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. The investment securities portfolio is evaluated for OTTI by segregating the portfolio into two general segments and applying the appropriate OTTI model. Investment securities are generally evaluated for OTTI under ASC 320. However, certain purchased beneficial interest, including certain non-agency government-sponsored mortgage-backed securities, asset-backed securities and collateralized debt obligations are evaluated using the model outlined in ASC 325-10. In determining OTTI under ASC 320, management considers many factors, including: (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near term prospects of the issuer, (3) whether the market decline was affected by macroeconomic conditions, and (4) whether the Corporation has the intent to sell the debt security or more likely than not, will be required to sell the debt security before its anticipated recovery. The assessment of whether an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time. When OTTI occurs, the amount of OTTI recognized in the income statement depends on whether the Corporation intends to sell the security or it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis, less any recognized credit loss. If the intent is to sell, or it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis, less any recognized credit loss, the OTTI shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis, less any recognized credit loss, and its fair value at the balance sheet date. If the intent is not to sell the security and it is not more likely than not that the Corporation will be required to sell the security before the recovery of its amortized cost basis less any recognized credit loss, the OTTI has been separated into the amount representing the credit loss and the amount related to all other factors. The amount of the total OTTI related to the credit loss is determined based on the present value of cash flows expected to be collected and is recognized in earnings. The amount of the total OTTI related to other factors is recognized in other comprehensive income, net of applicable income taxes. The previous amortized cost basis less the OTTI recognized in earnings becomes the new amortized cost basis of the investment.
Held to Maturity Securities	HELD TO MATURITY SECURITIES are classified as held to maturity when the Corporation has the positive intent and ability to hold the securities to maturity. Securities held to maturity are carried at amortized cost. For held to maturity debt securities, the amount of an OTTI recorded in other comprehensive income for the noncredit portion of a previous other-than-temporary impairment is amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security.
Loans Held for Sale	LOANS HELD FOR SALE are carried at the principal amount outstanding. The carrying amount approximates fair value due to the short duration between origination and the date of sale.
Loans	LOANS held in the Corporation’s portfolio are carried at the principal amount outstanding, net of unearned income. Certain non-accrual, substantially delinquent and renegotiated loans classified as troubled debt restructures may be considered to be impaired in accordance with ASC 310. Under ASC 310, a loan is impaired when, based on current information or events, it is probable that the Bank will be unable to collect all amounts due (principal and interest) according to the contractual terms of the loan agreement. Renegotiated consumer loans classified as troubled debt restructures are considered to be impaired. In applying the provisions of ASC 310, the Corporation considers all other investments in one-to-four family residential loans and consumer installment loans to be homogeneous and therefore excluded from separate identification for evaluation of impairment. Interest income is accrued on the principal balances of loans. The accrual of interest is discontinued on a loan when, in management’s opinion, the borrower may be unable to meet payments as they become due. When the interest accrual is discontinued, all unpaid accrued interest is reversed against earnings when considered uncollectable. Interest income accrued in the prior year, if any, is charged to the allowance for loan losses. Interest income is subsequently recognized only to the extent cash payments are received and the loan is returned to accruing status. Certain loan fees and direct costs are being deferred and amortized as an adjustment of yield on the loans. Impaired loans are carried at the fair value of collateral if the loan is collateral dependent, or the present value of estimated future cash flows using the loan’s existing rate. A portion of the allowance for loan losses is allocated to impaired loans if the value of such loans is deemed to be less than the unpaid balance. If these allocations cause the allowance for loan losses to increase, such increase is reported as a component of the provision for loan losses. Loan losses are charged against the allowance when management believes the uncollectability of the loan is confirmed. The valuation would be considered Level 3, consisting of appraisals of underlying collateral and discounted cash flow analysis. Loan commitments and letters-of-credit generally have short-term, variable-rate features and contain clauses which limit the Bank’s exposure to changes in customer credit quality. Accordingly, their carrying values, which are immaterial at the respective balance sheet dates, are reasonable estimates of fair value.
Loans Acquired in Business Combinations	LOANS ACQUIRED IN BUSINESS COMBINATIONS 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 purchased credit impaired. Evidence of credit quality deterioration as of purchase dates may include information such as past-due and nonaccrual status, borrower credit scores and recent loan to value percentages. Acquired credit-impaired loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality (ASC 310-30). These loans are initially measured at fair value based upon expected cash flows without anticipation of prepayments and includes estimated future credit losses expected to be incurred over the life of the loans. As a result, related discounts are recognized subsequently through accretion based on the expected cash flows of the acquired loans. For purposes of applying ASC 310-30, loans acquired in business combinations are individually evaluated for the initial fair value measurement. Accordingly, allowances for credit losses related to these loans are not carried over and recorded at the acquisition date. The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the nonaccretable portion of the fair value discount or premium. The accretable portion of the fair value discount or premium is the difference between the expected cash flows and the net present value of expected cash flows, with such difference accreted into earnings over the term of the loans. Acquired loans not accounted for under ASC 310-30 are accounted for under ASC 310-20, which allows the fair value adjustment to be accreted into income over the remaining life of the loans.
Allowance for Loan Losses	ALLOWANCE FOR LOAN LOSSES is maintained to absorb losses inherent in the loan portfolio and is based on ongoing, quarterly assessments of the probable losses inherent in the loan portfolio. The allowance is increased by the provision for loan losses, which is charged against current operating results. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. The Corporation’s strategy for credit risk management includes credit policies and underwriting criteria for all loans, as well as an overall credit limit for each customer significantly below legal lending limits. The strategy also emphasizes diversification on regional geographic and industry levels, regular credit quality reviews and management reviews of large credit exposures and loans experiencing deterioration of credit quality. The Corporation’s methodology for assessing the appropriateness of the allowance consists of three key elements – the determination of the appropriate reserves for impaired loans accounted for under ASC 310, probable losses estimated from historical loss rates, and probable losses resulting from economic, environmental, qualitative or other deterioration above and beyond what is reflected in the first two components of the allowance. Commercial relationships greater than $500,000 that exhibit probable or observed credit weaknesses are subject to individual review. Where appropriate, reserves are allocated to individual loans based on management’s estimate of the borrower’s ability to repay the loan given the availability of collateral, other sources of cash flow and legal options available to the Corporation. Included in the review of individual loans are those that are impaired as provided in ASC 310. Any allowances for impaired loans are measured based on the fair value of the underlying collateral if collateral dependent or the present value of expected future cash flows discounted at the loan’s effective interest rate. The Corporation evaluates the collectability of principal when assessing the need for a loss accrual. Historical loss rates are applied to other commercial loans not subject to specific reserve allocations. The historical allocation for commercial loans graded pass are established by loan segments using loss rates based on the Corporation’s migration analysis. This migration analysis shows the loss rates for each segment of loans based on the loan grades at the beginning of the twelve month period. This loss rate is then applied to the current portfolio of loans in each respective loan segment. Homogenous loans, such as consumer installment and residential mortgage loans, are not individually risk graded. Reserves are established for each segment of loans using loss rates based on charge offs for the same period as the migration analysis used for commercial loans. Historical loss allocations for commercial and consumer loans may be adjusted for significant factors that, in management’s judgment, reflect the impact of any current conditions on loss recognition. Factors which management considers in the analysis include the effects of the national and local economies, trends in loan growth and charge-off rates, changes in mix, concentration of loans in specific industries, asset quality trends (delinquencies, charge offs and non-accrual loans), risk management and loan administration, changes in the internal lending policies and credit standards, examination results from bank regulatory agencies and the Corporation’s internal loan review.
Pension	PENSION benefits are provided to the Corporation’s employees. Its accounting policies related to pensions and other post retirement benefits reflect the guidance in ASC 715, Compensation – Retirement Benefits. The Corporation does not consolidate the assets and liabilities associated with the pension plan. Instead, the Corporation recognizes the funded status of the plan in the consolidated balance sheets. The measurement of the funded status and the annual pension expense involves actuarial and economic assumptions. Various statistical and other factors, which attempt to anticipate future events, are used in calculating the expense and liabilities related to the plans. Key factors include assumptions on the expected rates of return on plan assets, discount rates, expected rates of salary increases and health care costs and trends. The Corporation considers market conditions, including changes in investment returns and interest rates in making these assumptions. The primary assumptions used in determining the Corporation’s pension and post retirement benefit obligations and related expenses are presented in Note 20. PENSION AND OTHER POST RETIREMENT BENEFIT PLANS, in the Notes to Consolidated Financial Statements included as Item 8 of this Annual Report on Form 10-K.
Premises and Equipment	PREMISES AND EQUIPMENT is carried at cost net of accumulated depreciation. Depreciation is computed using the straight-line and declining balance methods based on the estimated useful lives of the assets ranging from three to forty years. Maintenance and repairs are expensed as incurred, while major additions and improvements, which extend the useful life, are capitalized. Gains and losses on dispositions are included in current operations.
Federal Home Loan Bank Stock	FEDERAL HOME LOAN BANK STOCK is a required investment for institutions that are members of the FHLB. The Bank is a member of the FHLB of Indianapolis. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income.
Intangible Assets	INTANGIBLE ASSETS that are subject to amortization, including core deposit intangibles, are being amortized on both the straight-line and accelerated basis over three to twenty years. Intangible assets are periodically evaluated as to the recoverability of their carrying value.
Goodwill	GOODWILL is maintained by applying the provisions of ASC 350. For purchase acquisitions, the Corporation is required to record the assets acquired, including identified intangible assets, and the liabilities assumed at their fair value, which in many instances involves estimates based on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analysis or other valuation techniques that may include estimates of attrition, inflation, asset growth rates or other relevant factors. In addition, the determination of the useful lives for which an intangible asset will be amortized is subjective. Under ASC 350, Intangibles – Goodwill and Other , the Corporation is required to evaluate goodwill for impairment on an annual basis, as well as on an interim basis, if events or changes indicate that the asset may be impaired, indicating that the carrying value may not be recoverable. The Corporation has historically elected to test for goodwill impairment as of October 1 of each year and has determined that no impairment exists.
Bank Owned Life Insurance	BANK OWNED LIFE INSURANCE has been purchased on certain employees and directors of the Corporation. The Corporation 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.
Other Real Estate Owned	OTHER REAL ESTATE OWNED consists of assets acquired through, or in lieu of, loan foreclosure and are held for sale. They are initially recorded at fair value less cost to sell at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations and changes in the valuation are included in other real estate owned and foreclosure expenses. Other real estate owned also includes bank premises formerly, but no longer used for banking. Bank premises are transferred at the lower of carrying value or fair value less cost to sell.
Derivative Instruments	DERIVATIVE INSTRUMENTS are carried at the fair value of the derivatives and reflects the estimated amounts that would have been received to terminate these contracts at the reporting date based upon pricing or valuation models applied to current market information. As part of the asset/liability management program, the Corporation will utilize, from time to time, interest rate floors, caps or swaps to reduce its sensitivity to interest rate fluctuations. These are derivative instruments, which are recorded as assets or liabilities in the consolidated balance sheets at fair value. Changes in the fair values of derivatives are reported in the consolidated statements of operations or AOCI depending on the use of the derivative and whether the instrument qualifies for hedge accounting. The key criterion for the hedge accounting is that the hedged relationship must be highly effective in achieving offsetting changes in those cash flows that are attributable to the hedged risk, both at inception of the hedge and on an ongoing basis. Derivatives that qualify for the hedge accounting treatment are designated as either: a hedge of the fair value of the recognized asset or liability or of an unrecognized firm commitment (a fair value hedge) or a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (a cash flow hedge). To date, the Corporation has only entered into a cash flow hedge. For cash flow hedges, changes in the fair values of the derivative instruments are reported in AOCI to the extent the hedge is effective. The gains and losses on derivative instruments that are reported in AOCI are reflected in the consolidated statements of income in the periods in which the results of operations are impacted by the variability of the cash flows of the hedged item. Generally, net interest income is increased or decreased by amounts receivable or payable with respect to the derivatives, which qualify for hedge accounting. At inception of the hedge, the Corporation establishes the method it uses for assessing the effectiveness of the hedging derivative and the measurement approach for determining the ineffective aspect of the hedge. The ineffective portion of the hedge, if any, is recognized in the consolidated statements of income. The Corporation excludes the time value expiration of the hedge when measuring ineffectiveness. The Corporation offers interest rate derivative products (e.g. interest rate swaps) to certain of its high-quality commercial borrowers. This product allows customers to enter into an agreement with the Corporation to swap their variable rate loan to a fixed rate. These derivative products are designed to reduce, eliminate or modify the risk of changes in the borrower’s interest rate or market price risk. The extension of credit incurred through the execution of these derivative products is subject to the same approvals and rigorous underwriting standards as the related traditional credit product. The Corporation limits its risk exposure to these products by entering into a mirror-image, offsetting swap agreement with a separate, well-capitalized and rated counterparty previously approved by the Credit and Asset Liability Committee. By using these interest rate swap arrangements, the Corporation is also better insulated from the interest rate risk associated with underwriting fixed-rate loans. These derivative contracts are not designated against specific assets or liabilities under ASC 815, Derivatives and Hedging , and, therefore, do not qualify for hedge accounting. The derivatives are recorded on the balance sheet at fair value and changes in fair value of both the customer and the offsetting swap agreements are recorded (and essentially offset) in non-interest income. The fair value of the derivative instruments incorporates a consideration of credit risk (in accordance with ASC 820), resulting in some volatility in earnings each period.
Income Tax	INCOME TAX in the consolidated statements of income includes deferred income tax provisions or benefits for all significant temporary differences in recognizing income and expenses for financial reporting and income tax purposes. The Corporation files consolidated income tax returns with its subsidiaries. The Corporation is generally no longer subject to U.S. federal, state and local income tax examinations by tax authorities for tax years before 2013 . The Corporation adopted the provisions of the ASC 740, Income Taxes , which prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. As a result of the implementation of ASC 740, the Corporation did not identify any uncertain tax positions that it believes should be recognized in the financial statements. The Corporation's policy is to recognize interest and penalties related to unrecognized tax benefits, if any, as a component of income tax expense.
Stock Option and Restricted Stock Award Plans	STOCK OPTION AND RESTRICTED STOCK AWARD PLANS are maintained by the Corporation. The compensation costs are recognized for stock options and restricted stock awards issued to employees and directors based on the fair value of these awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options. The market price of the Corporation’s common stock at the date of grant is used for restricted stock awards. Compensation expense is recognized over the appropriate service period, which is generally two or three years.
Transfers of Financial Assets	TRANSFERS 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 Corporation 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 Corporation 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.
Net Income Per Share	NET INCOME PER SHARE is computed by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding. Diluted net income per share is computed by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding, plus the dilutive effect of outstanding stock options and nonvested restricted stock.
Reclassifications	RECLASSIFICATIONS have been made to prior financial statements to conform to the current financial statement presentation. These reclassifications had no effect on net income.

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	12 Months Ended
	Dec. 31, 2016
Business Acquisition [Line Items]
Schedule of Pro Forma Information from Acquisition	The following schedule includes pro forma results for the periods ended December 31, 2015 and 2014 as if the Ameriana and Community acquisitions had occurred as of the beginning of the comparable prior annual reporting period. Pro forma financial information of the C Financial acquisition is not included in the table below as it is deemed immaterial. 2015 2014 Total revenue (net interest income plus other income) $ 291,614 $ 284,890 Net income $ 60,497 $ 64,174 Net income available to common shareholders $ 60,497 $ 64,174 Earnings per share: Basic $ 1.49 $ 1.58 Diluted $ 1.48 $ 1.57
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Schedule of Preliminary Valuations of the Fair Value of Assets Acquired and Liabilities Assumed	The purchase price of the Ameriana acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 61,754 Loans 316,929 Premises and equipment 13,946 Federal Home Loan Bank stock 2,693 Other real estate owned 5,613 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 6,713 Deposits (383,718 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,884 ) Subordinated Debentures (5,487 ) Other liabilities (9,451 ) Net tangible assets acquired 26,436 Core deposit intangible 5,342 Goodwill 38,624 Purchase price $ 70,402
Merger with C Financial Corporation
Business Acquisition [Line Items]
Schedule of Preliminary Valuations of the Fair Value of Assets Acquired and Liabilities Assumed	The purchase price of the C Financial acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 2,496 Federal Funds sold 7,018 Interest-bearing time deposits 922 Loans 110,625 Premises and equipment 7,290 Federal Home Loan Bank stock 855 Interest receivable 292 Other assets 119 Deposits (105,326 ) Interest payable (29 ) Federal Home Loan Bank Advances (18,958 ) Other liabilities (2,911 ) Net tangible assets acquired 2,393 Core deposit intangible 981 Goodwill 11,126 Purchase price $ 14,500
Merger with Community Bancshares, Inc.
Business Acquisition [Line Items]
Schedule of Preliminary Valuations of the Fair Value of Assets Acquired and Liabilities Assumed	The purchase price of the Community acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 4,124 Interest -bearing time deposits 16,526 Investment Securities, available for sale 76,807 Loans 145,064 Premises and equipment 3,610 Federal Home Loan Bank stock 1,950 Interest Receivable 767 Cash surrender value of life insurance 3,266 Other real estate owned 6,662 Taxes, deferred and receivable 3,348 Other assets 167 Deposits (228,424 ) Interest payable (98 ) Other liabilities (3,014 ) Net tangible assets acquired $ 30,755 Core deposit intangible 4,658 Goodwill 13,776 Purchase price $ 49,189

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Approximate Market Value of Securities	The amortized cost, gross unrealized gains, gross unrealized losses and approximate market value of the Corporation's investment securities at the dates indicated were: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale at December 31, 2016 U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 360,779 $ 8,443 $ 5,564 363,658 U.S. Government-sponsored mortgage-backed securities 313,459 1,904 3,071 312,292 Corporate obligations 31 31 Equity securities 21,820 1,039 20,781 Total available for sale 696,189 10,347 9,674 696,862 Held to maturity at December 31, 2016 U.S. Government-sponsored agency securities 22,619 479 22,140 State and municipal 224,811 3,136 1,796 226,151 U.S. Government-sponsored mortgage-backed securities 360,213 4,956 1,527 363,642 Total held to maturity 607,643 8,092 3,802 611,933 Total Investment Securities $ 1,303,832 $ 18,439 $ 13,476 $ 1,308,795 Available for sale at December 31, 2015 U.S. Government-sponsored agency securities $ 100 $ 4 $ 104 State and municipal 291,730 14,241 $ 60 305,911 U.S. Government-sponsored mortgage-backed securities 342,550 4,234 518 346,266 Corporate obligations 31 31 Equity securities 3,912 3,912 Certificates of deposit 2,176 2,176 Total available for sale 640,499 18,479 578 658,400 Held to maturity at December 31, 2015 State and municipal 219,767 6,982 15 226,734 U.S. Government-sponsored mortgage-backed securities 398,832 7,601 787 405,646 Total held to maturity 618,599 14,583 802 632,380 Total Investment Securities $ 1,259,098 $ 33,062 $ 1,380 $ 1,290,780
Debt Securities Credit Loss Recognized in Income, and Other Losses Recorded in Other Comprehensive Income	The following table provides information about debt securities for which only a credit loss was recognized in income and other losses were recorded in other comprehensive income. Accumulated Credit Losses in Accumulated Credit Losses in 2016 2015 Credit losses on debt securities held: Balance, January 1 $ — $ 500 Reductions for previous other-than-temporary losses realized on securities sold during the year — $ (500 ) Balance, December 31 $ — $ —
Investments' Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position	The following table shows the Corporation’s gross unrealized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position at December 31, 2016 and 2015 : Less than 12 Months 12 Months or Longer Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2016 State and municipal $ 126,593 $ 5,564 $ 126,593 $ 5,564 U.S. Government-sponsored mortgage-backed securities 185,544 3,071 185,544 3,071 Equity securities 18,765 1,039 18,765 1,039 Total Temporarily Impaired Available for Sale Securities 330,902 9,674 330,902 9,674 Temporarily Impaired Held to Maturity Securities at December 31, 2016 U.S. Government-sponsored agency securities 19,121 479 19,121 479 State and municipal 50,897 1,796 50,897 1,796 U.S. Government-sponsored mortgage-backed securities 109,377 1,527 109,377 1,527 Total Temporarily Impaired Held to Maturity Securities 179,395 3,802 179,395 3,802 Total Temporarily Impaired Investment Securities $ 510,297 $ 13,476 $ 510,297 $ 13,476 Less than 12 Months 12 Months or Longer Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2015 State and municipal $ 7,558 $ 60 $ 7,558 $ 60 U.S. Government-sponsored mortgage-backed securities 83,396 445 $ 2,101 $ 73 85,497 518 Total Temporarily Impaired Available for Sale Securities 90,954 505 2,101 73 93,055 578 Temporarily Impaired Held to Maturity Securities at December 31, 2015 State and municipal 1,982 15 1,982 15 U.S. Government-sponsored mortgage-backed securities 69,641 519 12,906 268 82,547 787 Total Temporarily Impaired Held to Maturity Securities 69,641 519 14,888 283 84,529 802 Total Temporarily Impaired Investment Securities $ 160,595 $ 1,024 $ 16,989 $ 356 $ 177,584 $ 1,380
Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities by Contractual Maturity	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. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at December 31, 2016 Due in one year or less $ 2,703 $ 2,717 $ 2,046 $ 2,047 Due after one through five years 16,359 17,068 61,921 63,193 Due after five through ten years 60,614 62,241 61,606 61,145 Due after ten years 281,234 281,763 121,857 121,906 360,910 363,789 247,430 248,291 U.S. Government-sponsored mortgage-backed securities 313,459 312,292 360,213 363,642 Equity securities 21,820 20,781 Total Investment Securities $ 696,189 $ 696,862 $ 607,643 $ 611,933

Loans and Allowance (Tables)

Loans and Allowance (Tables)	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Composition of Loan Portfolio by Loan Class	The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the years indicated: December 31, 2016 December 31, 2015 Commercial and industrial loans $ 1,194,646 $ 1,057,075 Agricultural production financing and other loans to farmers 79,689 97,711 Real estate loans: Construction 418,703 366,704 Commercial and farmland 1,953,062 1,802,921 Residential 739,169 786,105 Home equity 418,525 348,613 Individuals' loans for household and other personal expenditures 77,479 74,717 Lease financing receivables, net of unearned income 311 588 Other commercial loans 258,061 159,388 Loans 5,139,645 4,693,822 Allowance for loan losses (66,037 ) (62,453 ) Net Loans $ 5,073,608 $ 4,631,369
Changes in Allowance for Loan Losses	The following tables summarize changes in the allowance for loan losses by loan segment for the twelve months ended December 31, 2016, 2015 and 2014: Twelve Months Ended December 31, 2016 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Provision for losses 1,876 1,834 432 1,515 5,657 Recoveries on loans 1,806 2,090 369 1,091 5,356 Loans charged off (2,464 ) (2,408 ) (567 ) (1,990 ) (7,429 ) Balances, December 31, 2016 $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Twelve Months Ended December 31, 2015 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2014 $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964 Provision for losses (1,901 ) 1,710 299 310 (1 ) 417 Recoveries on loans 1,911 2,545 352 1,536 6,344 Loans charged off (2,356 ) (1,437 ) (620 ) (3,859 ) (8,272 ) Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Twelve Months Ended December 31, 2014 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2013 $ 27,176 $ 23,102 $ 2,515 $ 15,077 $ 67,870 Provision for losses 3,459 (464 ) 423 (839 ) $ (19 ) 2,560 Recoveries on loans 5,435 3,297 377 1,783 24 10,916 Loans charged off (7,246 ) (6,608 ) (657 ) (2,869 ) (2 ) (17,382 ) Balances, December 31, 2014 $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964
Allowance for Credit Losses and Loan Portfolio by Loan Segment	The following tables show the Corporation’s allowance for loan losses and loan portfolio by loan segment for the years indicated: December 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 37 $ 553 $ 298 $ 888 Collectively evaluated for impairment 27,659 23,108 $ 2,923 11,457 $ 2 65,149 Loans acquired with deteriorated credit quality Total Allowance for Loan Losses $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Loan balances: Individually evaluated for impairment $ 4,762 $ 21,358 9 $ 4,450 $ 30,579 Collectively evaluated for impairment 1,520,981 2,315,686 $ 77,470 1,151,396 $ 311 5,065,844 Loans acquired with deteriorated credit quality 6,653 34,721 1,848 43,222 Loans $ 1,532,396 $ 2,371,765 $ 77,479 $ 1,157,694 $ 311 $ 5,139,645 December 31, 2015 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 1,277 $ 243 $ 169 $ 1,689 Collectively evaluated for impairment 25,201 21,753 $ 2,689 10,966 $ 2 60,611 Loans acquired with deteriorated credit quality 149 4 153 Total Allowance for Loan Losses $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Loan balances: Individually evaluated for impairment $ 7,877 $ 16,670 $ 4,020 $ 28,567 Collectively evaluated for impairment 1,298,988 2,096,089 $ 74,717 1,125,316 $ 588 4,595,698 Loans acquired with deteriorated credit quality 7,309 56,866 5,382 69,557 Loans $ 1,314,174 $ 2,169,625 $ 74,717 $ 1,134,718 $ 588 $ 4,693,822
Summary of Non-Accrual Loans by Loan class	The following table summarizes the Corporation’s non-accrual loans by loan class for the years indicated: December 31, 2016 December 31, 2015 Commercial and industrial loans $ 1,839 $ 4,634 Agriculture production financing and other loans to farmers 1,329 827 Real estate loans: Construction 73 736 Commercial and farmland 15,754 11,277 Residential 9,523 11,818 Home equity 1,457 1,952 Individuals' loans for household and other personal expenditures 23 145 Total $ 29,998 $ 31,389
Composition of Impaired Loans by Loan Class	The following tables show the composition of the Corporation’s commercial impaired loans by loan class for the years indicated: December 31, 2016 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 17,645 $ 10,074 $ 13,393 $ 499 Agriculture production financing and other loans to farmers 757 680 750 3 Real estate loans: Construction 5,946 3,178 3,255 258 Commercial and farmland 67,936 49,731 51,740 2,978 Residential 8,039 4,664 5,410 167 Home equity 82 44 44 Other commercial loans 11 Total $ 100,416 $ 68,371 $ 74,592 $ 3,905 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 $ 691 Real estate loans: Commercial and farmland 4,238 2,985 553 2,989 Residential 65 34 23 38 Total $ 4,963 $ 3,679 $ 612 $ 3,718 Total Impaired Loans $ 105,379 $ 72,050 $ 612 $ 78,310 $ 3,905 December 31, 2015 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 22,151 $ 11,669 $ 12,578 $ 488 Agriculture production financing and other loans to farmers 370 361 439 Real estate loans: Construction 4,551 2,336 3,662 157 Commercial and farmland 95,930 69,024 71,569 3,328 Residential 11,262 7,338 7,926 244 Home equity 297 247 249 Other commercial loans 20 Total $ 134,581 $ 90,975 $ 96,423 $ 4,217 Impaired loans with related allowance: Commercial and industrial loans $ 3,043 $ 2,690 $ 1,247 $ 2,752 $ 38 Agriculture production financing and other loans to farmers 466 466 30 538 Real estate loans: Commercial and farmland 2,144 1,933 392 1,868 Residential 2,300 1,463 173 1,787 Total $ 7,953 $ 6,552 $ 1,842 $ 6,945 $ 38 Total Impaired Loans $ 142,534 $ 97,527 $ 1,842 $ 103,368 $ 4,255 December 31, 2014 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 35,514 $ 18,029 $ 18,711 $ 362 Agriculture production financing and other loans to farmers 26 22 26 Real estate loans: Construction 12,956 9,318 9,837 427 Commercial and farmland 95,856 68,187 70,844 3,389 Residential 10,591 6,839 6,987 119 Home equity 3,590 398 402 Other commercial loans 30 Total $ 158,563 $ 102,793 $ 106,807 $ 4,297 Impaired loans with related allowance: Commercial and industrial loans $ 1,766 $ 1,684 $ 1,055 $ 1,721 $ 40 Agriculture production financing and other loans to farmers 6,777 5,777 400 8,044 1 Real estate loans: Commercial and farmland 7,159 4,971 1,120 4,999 24 Residential 1,001 998 194 1,000 Total $ 16,703 $ 13,430 $ 2,769 $ 15,764 $ 65 Total Impaired Loans $ 175,266 $ 116,223 $ 2,769 $ 122,571 $ 4,362
Credit Quality of Loan Portfolio by Loan Class	The following tables summarize the credit quality of the Corporation’s loan portfolio, by loan class for the years indicated. Consumer non-performing loans include accruing consumer loans 90 plus days delinquent and consumer non-accrual loans. The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified date. Loans that evidenced deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected are included in the applicable categories below. December 31, 2016 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,117,545 $ 30,919 $ 46,182 $ 1,194,646 Agriculture production financing and other loans to farmers 30,712 25,273 23,704 79,689 Real estate loans: Construction 398,646 3,490 1,858 $ 14,636 $ 73 418,703 Commercial and farmland 1,811,367 60,028 80,626 1,034 7 1,953,062 Residential 146,251 5,106 6,046 574,054 7,712 739,169 Home equity 7,310 47 516 409,237 1,415 418,525 Individuals' loans for household and other personal expenditures 77,456 23 77,479 Lease financing receivables, net of unearned income 228 83 311 Other commercial loans 257,861 200 258,061 Loans $ 3,769,920 $ 124,863 $ 159,215 $ 1,076,417 $ 9,230 $ 5,139,645 December 31, 2015 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 962,340 $ 48,432 $ 45,984 $ 319 $ 1,057,075 Agriculture production financing and other loans to farmers 77,884 6,665 13,162 97,711 Real estate loans: Construction 345,449 1,271 1,790 $ 18,114 $ 80 366,704 Commercial and farmland 1,679,141 46,442 77,338 1,802,921 Residential 171,576 3,107 10,428 593,533 7,461 786,105 Home equity 8,218 48 600 337,718 2,029 348,613 Individuals' loans for household and other personal expenditures 74,491 226 74,717 Lease financing receivables, net of unearned income 495 93 588 Other commercial loans 159,388 159,388 Loans $ 3,404,491 $ 105,965 $ 149,395 $ 319 $ 1,023,856 $ 9,796 $ 4,693,822
Past Due Aging of Loan Portfolio by Loan Class	The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated: December 31, 2016 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645 December 31, 2015 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,052,275 $ 166 $ 4,634 $ 4,800 $ 1,057,075 Agriculture production financing and other loans to farmers 96,884 827 827 97,711 Real estate loans: Construction 362,084 3,884 736 4,620 366,704 Commercial and farmland 1,786,092 5,552 11,277 16,829 1,802,921 Residential 765,634 6,090 $ 2,061 $ 502 11,818 20,471 786,105 Home equity 344,344 1,433 560 324 1,952 4,269 348,613 Individuals' loans for household and other personal expenditures 73,990 445 56 81 145 727 74,717 Lease financing receivables, net of unearned income 588 588 Other commercial loans 159,324 64 64 159,388 Loans $ 4,641,215 $ 17,570 $ 2,741 $ 907 $ 31,389 $ 52,607 $ 4,693,822
Schedules of Troubled Debt Restructuring	The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2016 and 2015 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this schedule, a loan is considered in default if it is 30 or more days past due. Twelve Months Ended December 31, 2016 Number of Loans Recorded Balance Commercial and industrial loans 3 $ 197 Agriculture production financing and other loans to farmers 1 661 Real estate loans: Commercial and farmland 1 343 Residential 1 64 Total 6 $ 1,265 Twelve Months Ended December 31, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 The following tables summarize the recorded investment of troubled debt restructurings as of December 31, 2016 and 2015 , by modification type, that occurred during the periods indicated: December 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 397 $ 397 Agriculture production financing and other farm loans $ 660 $ 12 672 Real estate loans: Commercial and farmland 297 3,456 3,753 Residential 238 928 1,166 Home equity 266 266 Individuals' loans for household and other personal expenditures 9 9 Total $ 1,195 $ 1,215 $ 3,853 $ 6,263 December 31, 2015 Term Rate Combination Total Commercial and industrial loans $ 761 $ 1,053 $ 1,814 Real estate loans: Commercial and farmland 1,231 1,026 2,257 Residential 823 $ 170 45 1,038 Home equity 242 242 Individuals' loans for household and other personal expenditures 27 27 Total $ 2,815 $ 439 $ 2,124 $ 5,378 The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods ended December 31, 2016 and 2015 : December 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 410 $ 410 4 Agriculture production financing and other loans to farmers 1,368 1,234 4 Real estate loans: Commercial and farmland 3,978 3,954 7 Residential 1,126 1,183 17 Home Equity 266 244 4 Individuals' loans for household and other personal expenditures 17 10 1 Total $ 7,165 $ 7,035 37 December 31, 2015 Pre-Modification Post-Modification Number Commercial and industrial loans $ 4,111 $ 2,115 7 Real estate loans: Construction 79 80 1 Commercial and farmland 1,281 3,024 3 Residential 200 1,113 10 Home equity 263 242 1 Individuals' loans for household and other personal expenditures 26 27 1 Total $ 5,960 $ 6,601 23

Accounting for Certain Loans 41

Accounting for Certain Loans Acquired in a Purchase (Tables)	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Schedule of Outstanding Balance and Carrying Amount of Acquired Loans	The following tables include the outstanding balance and carrying amount of all acquired loans which are included in the Corporation's balance sheet at December 31, 2016 and December 31, 2015. December 31, 2016 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 8,003 $ 85 $ 2,269 $ 23,327 $ 3,552 $ 37,236 Agricultural production financing and other loans to farmers 1,030 50 1,630 2,710 Real estate loans: Construction 22,017 2,835 4,026 420 29,298 Commercial and farmland 103,075 22,130 36,947 131,895 9,315 303,362 Residential 103,414 44,101 9,363 96,627 4,135 257,640 Home Equity 11,728 7,947 6,326 26,894 11,924 64,819 Individuals' loans for household and other personal expenditures 762 2 147 201 30 1,142 Other commercial loans 1,825 65 1,890 Total $ 250,824 $ 77,100 $ 60,108 $ 279,479 $ 30,586 $ 698,097 Carrying Amount $ 240,053 $ 75,194 $ 56,007 $ 266,845 $ 27,318 $ 665,417 Allowance 265 23 92 380 Carrying Amount Net of Allowance $ 239,788 $ 75,194 $ 55,984 $ 266,753 $ 27,318 $ 665,037 December 31, 2015 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 21,888 $ 104 $ 6,769 $ 52,060 $ 4,620 $ 85,441 Agricultural production financing and other loans to farmers 1,761 1,288 3,049 Real estate loans: Construction 23,365 6,214 10,436 976 40,991 Commercial and farmland 144,514 27,838 49,997 189,372 13,293 425,014 Residential 123,231 55,856 21,886 118,105 6,063 325,141 Home Equity 14,261 9,144 8,231 31,986 13,431 77,053 Individuals' loans for household and other personal expenditures 1,731 10 461 443 48 2,693 Other commercial loans 1,928 72 2,000 Total $ 330,918 $ 99,166 $ 99,541 $ 393,014 $ 38,743 $ 961,382 Carrying Amount $ 319,664 $ 96,829 $ 93,355 $ 373,649 $ 34,092 $ 917,589 Allowance 4 149 153 Carrying Amount Net of Allowance $ 319,664 $ 96,829 $ 93,351 $ 373,500 $ 34,092 $ 917,436
Schedule of Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement	The accretable yield, or income expected to be collected, and reclassifications from nonaccretable yield, are identified in the tables below. The tables reflect only purchased loans accounted for under ASC 310-30 and not the entire portfolio of purchased loans. Twelve Months Ended December 31, 2016 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Additions Accretion (311 ) (123 ) (1,119 ) (4,268 ) (756 ) (6,577 ) Reclassification from nonaccretable 12 82 858 3,827 393 5,172 Disposals (232 ) (14 ) (11 ) (257 ) Ending balance $ 1,629 $ 73 $ 1,233 $ 736 $ 279 $ 3,950 Twelve Months Ended December 31, 2015 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,122 $ 2,400 $ 868 $ 5,390 Additions $ 2,160 $ 145 2,305 Accretion (31 ) (723 ) (4,050 ) (1,046 ) (5,850 ) Reclassification from nonaccretable 249 2,854 822 3,925 Disposals (140 ) (16 ) (2 ) (158 ) Ending balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Twelve Months Ended December 31, 2014 Community CFS SCB Total Beginning balance $ 4,164 $ 1,388 $ 5,552 Additions $ 2,234 2,234 Accretion (231 ) (4,146 ) (1,062 ) (5,439 ) Reclassification from nonaccretable 119 2,553 577 3,249 Disposals (171 ) (35 ) (206 ) Ending balance $ 2,122 $ 2,400 $ 868 $ 5,390
Schedule of Loans Acquired for which Contractually Required Payments would not be Collected	The following table presents loans acquired during the period ending December 31, 2015, for which it was probable at acquisition that all contractually required payments would not be collected. There were no loans acquired during the period ending December 31, 2016. 2015 Ameriana C Financial Total Contractually required payments receivable at acquisition date $ 23,172 $ 2,632 $ 25,804 Nonaccretable difference 11,592 637 12,229 Expected cash flows at acquisition date 11,580 1,995 13,575 Accretable difference 2,160 145 2,305 Basis in loans at acquisition date $ 9,420 $ 1,850 $ 11,270

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	The following table summarizes the Corporation's premises and equipment as of December 31, 2016 and 2015 : 2016 2015 Cost at December 31: Land $ 25,035 $ 26,510 Buildings and Leasehold Improvements 114,444 115,461 Equipment 65,547 64,892 Total Cost 205,026 206,863 Accumulated Depreciation and Amortization (110,594 ) (109,215 ) Net $ 94,432 $ 97,648
Schedule of Future Minimum Rental Payments for Operating Leases	The future minimum rental commitments required under the operating leases in effect at December 31, 2016 , expiring at various dates through the year 2035 are as follows for the years ending December 31: Future Minimum Rental Commitments 2017 $ 3,298 2018 1,998 2019 1,624 2020 1,388 2021 1,056 After 2021 6,487 Total Future Minimum Obligations $ 15,851

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	2016 2015 Balance, January 1 $ 243,129 $ 202,724 Goodwill acquired 48,879 Goodwill reduction (8,474 ) Measurement period adjustment 871 Balance, December 31 $ 244,000 $ 243,129

Core Deposit and Other Intang44

Core Deposit and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Core Deposit and Other Intangibles	The carrying basis and accumulated amortization of recognized core deposit and other intangibles are noted below. 2016 2015 Gross carrying amount $ 61,798 $ 58,360 Core deposit intangible and other intangibles acquired 4,181 Measurement period adjustment 2,142 Accumulated amortization (49,074 ) (45,164 ) Core deposit intangible and other intangibles reduction (742 ) Core Deposit and Other Intangibles $ 14,866 $ 16,635
Schedule of Estimated Future Amortization Expense	Estimated future amortization expense is summarized as follows: Amortization Expense 2017 $ 3,614 2018 2,299 2019 1,914 2020 1,733 2021 1,611 After 2021 3,695 $ 14,866

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule of Deposits	The composition of the deposit portfolio is included in the table below for the years indicated: December 31, 2016 December 31, 2015 Demand deposits $ 2,866,853 $ 2,576,283 Savings deposits 1,560,752 1,518,722 Certificates and other time deposits of $100,000 or more 276,274 323,698 Other certificates and time deposits 471,247 556,476 Brokered deposits 381,372 314,468 Total deposits $ 5,556,498 $ 5,289,647
Summary of Contractual Maturities of Time Deposits	At December 31, 2016, the contractual maturities of time deposits are summarized as follows: Certificates and Other Time Deposits 2017 $ 621,205 2018 230,560 2019 137,090 2020 65,396 2021 43,010 After 2021 31,632 $ 1,128,893

Transfers Accounted for as Se46

Transfers Accounted for as Secured Borrowings (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule of Collateral Pledged for all Repurchase Agreements Accounted for as Secured Borrowings	The collateral pledged for all repurchase agreements that are accounted for as secured borrowings as of December 31, 2016 and 2015 were: December 31, 2016 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 129,617 1,337 10,253 $ 5,273 $ 146,480 December 31, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 131,537 5,680 8,892 $ 9,216 $ 155,325

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the Corporation's borrowings as of December 31, 2016 and 2015: December 31, 2016 December 31, 2015 Federal funds purchased $ 120,349 $ 49,721 Securities sold under repurchase agreements 146,480 155,325 Federal Home Loan Bank advances 298,923 235,652 Subordinated debentures and term loans 128,445 127,846 Total Borrowings $ 694,197 $ 568,544
Schedule of Maturities of Long-term Debt	Contractual maturities of borrowings as of December 31, 2016 , are as follows: Maturities in Years Ending December 31: Federal Funds Purchased Securities Sold Federal Home Subordinated 2017 $ 120,349 $ 146,480 $ 167,068 $ 1,018 2018 26,717 2019 13,828 2020 31,310 2021 25,000 After 2021 35,000 132,012 ASC 805 fair value adjustments at acquisition (4,585 ) $ 120,349 $ 146,480 $ 298,923 $ 128,445

Derivative Instruments and He48

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Financial Instruments and Classification on the Balance Sheet	The table below presents the fair value of the Corporation’s derivative financial instruments as well as their classification on the Balance Sheet as of December 31, 2016 and December 31, 2015 . Asset Derivatives Liability Derivatives December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015 Balance Sheet Location Fair Balance Sheet Location Fair Balance Sheet Location Fair Balance Sheet Location Fair Derivatives designated as hedging instruments: Interest rate contracts Other Assets $ 15 Other Assets $ 36 Other Liabilities $ 2,182 Other Liabilities $ 2,921 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 6,295 Other Assets $ 4,938 Other Liabilities $ 6,295 Other Liabilities $ 5,149
Effect of Derivative Financial Instruments on the Income Statement	The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated. Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative 2016 2015 Interest rate products $ (368 ) $ (1,681 ) Effect of Derivative Instruments on the Income Statement The tables below present the effect of the Corporation’s derivative financial instruments on the Income Statement for the years ended December 31, 2016 , 2015 and 2014 . Derivatives Not Location of Gain Amount of Gain (Loss) Recognized in Income on Derivative 2016 2015 2014 Interest rate contracts Other income $ 211 $ (53 ) $ (73 ) Derivatives Designated as Hedging Location of Loss Reclassified from Accumulated Other Comprehensive Income (Effective Portion) Amount of Loss Reclassified from Other Comprehensive Income into Income (Effective Portion) 2016 2015 2014 Interest rate contracts Interest expense $ (1,250 ) $ (1,427 ) $ (1,411 )

Fair Values of Financial Inst49

Fair Values of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements of Assets and Liabilities Recognized in the Balance Sheets Measured at Fair Value on Recurring Basis	The following table presents the fair value measurements of assets and liabilities recognized in the accompanying balance sheets measured at fair value on a recurring basis and the level within the ASC 820-10 fair value hierarchy in which the fair value measurements fall at December 31, 2016 and 2015 . Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 363,658 358,524 $ 5,134 U.S. Government-sponsored mortgage-backed securities 312,292 312,292 Corporate obligations 31 31 Equity securities 20,781 $ 18,765 2,012 4 Interest rate swap asset 6,295 6,295 Interest rate cap 15 15 Interest rate swap liability 8,477 8,477 Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 104 $ 104 State and municipal 305,911 300,014 $ 5,897 U.S. Government-sponsored mortgage-backed securities 346,266 346,266 Certificates of deposit 2,176 2,176 Corporate obligations 31 31 Equity securities 3,912 3,908 4 Interest rate swap asset 4,938 4,938 Interest rate cap 36 36 Interest rate swap liability 8,070 8,070
Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in the Balance Sheets using Significant Unobservable Level 3 Inputs	The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying balance sheets using significant unobservable Level 3 inputs for year ended December 31, 2016 and 2015 . Available for Sale Securities For The Year Ended December 31, 2016 December 31, 2015 Beginning Balance $ 5,932 $ 6,646 Included in other comprehensive income (223 ) 199 Principal payments (540 ) (913 ) Ending balance $ 5,169 $ 5,932
Description of Valuation Methodologies Used for Instruments Measured at Fair Value on a Non-Recurring Basis and Recognized in the Balance Sheets	Following is a description of valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy for year ended December 31, 2016 and 2015 . Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 15,318 $ 15,318 Other real estate owned $ 1,612 $ 1,612 Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 7,066 $ 7,066 Other real estate owned $ 5,529 $ 5,529
Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other than Goodwill	The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at December 31, 2016 and 2015 . December 31, 2016 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,134 Discounted cash flow Maturity Call Date 1 month to 20 years Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR Impaired loans (collateral dependent) $ 15,318 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (1%) Other real estate owned $ 1,612 Appraisals Discount to reflect current market conditions 0% - 10% (9%) December 31, 2015 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,897 Discounted cash flow Maturity Call Date 1 month to 15 years Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR Impaired loans (collateral dependent) $ 7,066 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 50% (2%) Other real estate owned $ 5,529 Appraisals Discount to reflect current market conditions 0% - 20% (2%)
Estimated Fair Values of Financial Instruments	The following table presents estimated fair values of the Corporation's financial instruments and the level within the fair value hierarchy in which the fair value measurements fall at December 31, 2016 and 2015 . 2016 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 127,927 $ 127,927 Interest-bearing time deposits 24,459 24,459 Investment securities available for sale 696,862 18,765 $ 672,928 $ 5,169 Investment securities held to maturity 607,643 597,246 14,687 Loans held for sale 2,929 2,929 Loans 5,073,608 4,933,552 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap asset 6,310 6,310 Interest receivable 26,194 26,194 Liabilities at December 31: Deposits $ 5,556,498 $ 4,427,605 $ 1,111,491 Borrowings: Federal funds purchased 120,349 120,349 Securities sold under repurchase agreements 146,480 146,449 Federal Home Loan Bank advances 298,923 297,465 Subordinated debentures and term loans 128,445 105,930 Interest rate swap liability 8,477 8,477 Interest payable 3,110 3,110 2015 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 102,170 $ 102,170 Interest-bearing time deposits 32,315 32,315 Investment securities available for sale 658,400 $ 652,468 $ 5,932 Investment securities held to maturity 618,599 598,082 34,298 Loans held for sale 9,894 9,894 Loans 4,631,369 4,539,940 Federal Reserve and Federal Home Loan Bank stock 37,633 37,633 Interest rate swap asset 4,974 4,974 Interest receivable 24,415 24,415 Liabilities at December 31: Deposits $ 5,289,647 $ 4,095,004 $ 1,177,142 Borrowings: Federal funds purchased 49,721 49,721 Securities sold under repurchase agreements 155,325 155,325 Federal Home Loan Bank advances 235,652 236,375 Subordinated debentures and term loans 127,846 103,643 Interest rate swap liability 8,070 8,070 Interest payable 3,092 3,092

Commitments and Contingent Li50

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Financial Instruments which Contract Amount Represents Credit Risk	Financial instruments, whose contract amount represents credit risk as of December 31, were as follows: 2016 2015 Amounts of commitments: Loan commitments to extend credit $ 2,057,878 $ 1,547,048 Standby letters of credit $ 46,010 $ 46,734

Accumulated Other Comprehensi51

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, as of December 31, 2016 and 2015 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 ) Other comprehensive income before reclassifications (9,087 ) (240 ) (470 ) (9,797 ) Amounts reclassified from accumulated other comprehensive income (2,203 ) 813 (1,032 ) (2,422 ) Period change (11,290 ) 573 (1,502 ) (12,219 ) Balance at December 31, 2016 $ 1,035 $ (1,774 ) $ (12,842 ) $ (13,581 ) Balance at December 31, 2014 $ 14,098 $ (2,182 ) $ (13,546 ) $ (1,630 ) Other comprehensive income before reclassifications (37 ) (1,093 ) 2,404 1,274 Amounts reclassified from accumulated other comprehensive income (1,736 ) 928 (198 ) (1,006 ) Period change (1,773 ) (165 ) 2,206 268 Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 )
Reclassification out of Accumulated Other Comprehensive Income (Loss)	The following table presents the reclassification adjustments out of accumulated other comprehensive income (loss) that were included in net income in the Consolidated Condensed Statements of Income for the years ended December 31, 2016 , 2015 and 2014 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Year Ended December 31, Details about Accumulated Other Comprehensive Income (Loss) Components 2016 2015 2014 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 3,389 $ 2,670 $ 3,581 Other income - net realized gains on sales of available for sale securities Related income tax expense (1,186 ) (934 ) (1,253 ) Income tax expense $ 2,203 $ 1,736 $ 2,328 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (1,250 ) $ (1,427 ) $ (1,411 ) Interest expense - subordinated debentures and term loans Related income tax benefit 437 499 493 Income tax expense $ (813 ) $ (928 ) $ (918 ) Unrealized gains (losses) on defined benefit plans Amortization of net loss and prior service costs $ 1,588 $ 305 $ 520 Other expenses - salaries and employee benefits Related income tax benefit (expense) (556 ) (107 ) (182 ) Income tax expense $ 1,032 $ 198 $ 338 Total reclassifications for the period, net of tax $ 2,422 $ 1,006 1,748 (1) For additional detail related to unrealized gains (losses) on available for sale securities and related amounts reclassified from accumulated other comprehensive income see Note 4. INVESTMENT SECURITIES. (2) For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see Note 13. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES.

Regulatory Capital and Divide52

Regulatory Capital and Dividends (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule of Actual and Required Capital Amounts and Ratios	The Corporation's and Bank's actual and required capital ratios as of December 31, 2016 and December 31, 2015 were as follows: Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 851,521 14.21 % $ 479,470 8.00 % N/A N/A First Merchants Bank 800,598 13.30 481,490 8.00 $ 601,862 10.00 % Tier 1 capital to risk-weighted assets First Merchants Corporation $ 720,484 12.02 % $ 359,603 6.00 % N/A N/A First Merchants Bank 734,561 12.20 361,117 6.00 $ 481,490 8.00 % Common equity tier 1 capital to risk-weighted assets First Merchants Corporation $ 665,445 11.10 % $ 269,702 4.50 % N/A N/A First Merchants Bank 734,561 12.20 270,838 4.50 $ 391,210 6.50 % Tier 1 capital to average assets First Merchants Corporation $ 720,484 10.54 % $ 273,456 4.00 % N/A N/A First Merchants Bank 734,561 10.78 272,461 4.00 $ 340,576 5.00 % Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 783,776 14.94 % $ 419,809 8.00 % N/A N/A First Merchants Bank 739,793 13.98 423,242 8.00 $ 529,052 10.00 % Tier 1 capital to risk-weighted assets First Merchants Corporation $ 656,323 12.51 % $ 314,857 6.00 % N/A N/A First Merchants Bank 677,340 12.80 317,431 6.00 $ 423,242 8.00 % Common equity tier 1 capital to risk-weighted assets First Merchants Corporation $ 603,063 11.49 % $ 236,143 4.50 % N/A N/A First Merchants Bank 677,340 12.80 238,074 4.50 $ 343,884 6.50 % Tier 1 capital to average assets First Merchants Corporation $ 656,323 10.85 % $ 242,001 4.00 % N/A N/A First Merchants Bank 677,340 11.22 241,423 4.00 $ 301,779 5.00 %

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Components of Share Based Compensation Awards	The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense: Years Ended December 31, 2016 2015 2014 Stock and ESPP Options Pre-tax compensation expense $ 76 $ 101 $ 237 Income tax expense (benefit) 18 4 (47 ) Stock and ESPP option expense, net of income taxes $ 94 $ 105 $ 190 Restricted Stock Awards Pre-tax compensation expense $ 2,524 $ 2,169 $ 1,940 Income tax benefit (883 ) (749 ) (679 ) Restricted stock awards expense, net of income taxes $ 1,641 $ 1,420 $ 1,261 Total Share-Based Compensation: Pre-tax compensation expense $ 2,600 $ 2,270 $ 2,177 Income tax benefit (865 ) (745 ) (726 ) Total share-based compensation expense, net of income taxes $ 1,735 $ 1,525 $ 1,451
Stock Option Activity Under Stock Option Plans	Stock option activity under the Corporation's stock option plans, as of December 31, 2016 , and changes during the year ended December 31, 2016 , were as follows: Number of Weighted-Average Weighted Average Aggregate Outstanding at January 1, 2016 442,012 $ 19.99 Exercised (128,848 ) $ 19.37 Canceled (52,953 ) $ 25.09 Outstanding December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982 Vested and Expected to Vest at December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982 Exercisable at December 31, 2016 260,211 $ 19.26 2.71 $ 4,785,982
Summary of Unvested RSAs Outstanding	The following table summarizes information on unvested RSAs outstanding as of December 31, 2016 : Number of Weighted-Average Unvested RSAs at January 1, 2016 354,504 $ 19.65 Granted 124,563 $ 24.01 Forfeited (9,594 ) $ 21.99 Vested (141,126 ) $ 16.62 Unvested RSAs at December 31, 2016 328,347 $ 22.87

Pension and Other Post Retire54

Pension and Other Post Retirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Schedule of Plans' Funded Status and Amounts Recognized in the Balance Sheets	The table below sets forth the plans’ funded status and amounts recognized in the consolidated balance sheets at December 31 , using measurement dates of December 31, 2016 and 2015 . 2016 2015 Change in Benefit Obligation: Benefit obligation at beginning of year $ 71,747 $ 80,650 Service cost 9 55 Interest cost 3,273 3,087 Actuarial loss (gain) 2,679 (5,617 ) Benefits paid (5,263 ) (6,428 ) Net transfers in from Ameriana acquisition 11,645 Benefit obligation at end of year $ 84,090 $ 71,747 Change in Plan Assets: Fair value of plan assets at beginning of year $ 71,396 $ 77,139 Actual return on plan assets 6,959 153 Employer contributions 739 532 Benefits paid (5,263 ) (6,428 ) Ameriana acquisition 9,726 End of year 83,557 71,396 Funded status at end of year $ (533 ) $ (351 ) Assets and Liabilities Recognized in the Balance Sheets: Deferred tax asset $ 7,041 $ 7,461 Assets $ 5,028 $ 4,006 Liabilities $ 5,561 $ 4,357 Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost, net of tax, consist of: Accumulated loss $ (12,624 ) $ (13,857 ) Prior service credit (451 ) (305 ) $ (13,075 ) $ (14,162 )
Schedule of Accumulated Benefit Obligation in Excess of Plan Assets	Information for pension plans with an accumulated benefit obligation in excess of plan assets is included in the table below. December 31, 2016 December 31, 2015 Projected benefit obligation $ 5,561 $ 4,357 Accumulated benefit obligation $ 5,561 $ 4,357 Fair value of plan assets
Schedule of Net Periodic Pension Costs	The following table shows the components of net periodic pension costs: December 31, 2016 December 31, 2015 December 31, 2014 Service cost $ 9 $ 55 $ 73 Interest cost 3,273 3,087 3,235 Expected return on plan assets (4,508 ) (4,471 ) (4,467 ) Amortization of prior service costs 79 64 81 Amortization of net loss 1,656 1,722 478 Net periodic pension (benefit) cost $ 509 $ 457 $ (600 )
Schedule of Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)	Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): December 31, 2016 December 31, 2015 December 31, 2014 Net periodic pension (benefit) cost $ 509 $ 457 $ (600 ) Net gain (loss) (228 ) 1,299 (12,203 ) Amortization of loss 1,656 1,722 478 Amortization of prior service cost 79 64 81 Total recognized in other comprehensive income (loss) 1,507 3,085 (11,644 ) Total recognized in net periodic pension cost and other comprehensive income (loss) $ 998 $ 2,628 $ (11,044 )
Schedule of Amounts in Accumulated Other Comprehensive Income to be Recognized over Next Fiscal Year	The estimated net loss and transition obligation for the defined benefit pension plans that will be amortized from accumulated other comprehensive income into net periodic pension cost over the next fiscal year are: December 31, 2016 December 31, 2015 December 31, 2014 Amortization of net loss $ (1,208 ) $ (1,505 ) $ (1,770 ) Amortization of prior service cost (90 ) (61 ) (64 ) Total $ (1,298 ) $ (1,566 ) $ (1,834 )
Schedule of Assumptions Used	Significant assumptions include: December 31, 2016 December 31, 2015 December 31, 2014 Weighted-average Assumptions Used to Determine Benefit Obligation: Discount rate 4.20 % 4.50 % 4.00 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % Weighted-average Assumptions Used to Determine Cost: Discount rate 4.50 % 4.00 % 4.80 % Expected return on plan assets 6.00 % 6.00 % 6.00 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 %
Schedule of Expected Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid as of December 31, 2016 . The minimum contribution required in 2017 will likely be zero but the Corporation may decide to make a discretionary contribution during the year. 2017 $ 5,756 2018 5,644 2019 5,802 2020 5,688 2021 5,557 After 2021 27,118 $ 55,565
Schedule of Allocation of Plan Assets	Following is a description of the valuation methodologies used for pension plan assets measured at fair value on a recurring basis, as well as the general classification of pension plan assets pursuant to the valuation hierarchy. Where quoted market prices are available in an active market, plan assets are classified within Level 1 of the valuation hierarchy. Level 1 plan assets total $64,064,000 and include cash and cash equivalents, common stocks, mutual funds and corporate bonds and notes. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of plan assets with similar characteristics or discounted cash flows. Level 2 plan assets total $19,493,000 and include governmental agencies, taxable municipals, common collective trust investments (which are classified below as Party-in-Interest investments -- common bond fund and common equity fund) and certificates of deposit. In certain cases where Level 1 or Level 2 inputs are not available, plan assets are classified within Level 3 of the hierarchy. There are no assets classified within Level 3 of the hierarchy at December 31, 2016 and 2015 . Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2016 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 3,778 $ 3,778 Corporate Bonds and Notes 10,646 10,646 Government Agency and Municipal Bonds and Notes 6,855 $ 6,855 Certificates of Deposit 1,268 1,268 Party-in-Interest Investments Common Stock 2,278 2,278 Common Bond Fund 4,744 4,744 Common Equity Fund 6,626 6,626 Mutual Funds Taxable Bond 7,974 7,974 Large Cap Equity 19,611 19,611 Mid Cap Equity 10,304 10,304 Small Cap Equity 4,680 4,680 International Equity 3,093 3,093 Specialty Alternative Equity 1,700 1,700 $ 83,557 $ 64,064 $ 19,493 Fair Value Measurements Using Quoted Prices in Significant Other Observable Inputs Significant December 31, 2015 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 1,608 $ 1,608 Corporate Bonds and Notes 9,113 9,113 Government Agency and Municipal Bonds and Notes 6,993 $ 6,993 Certificates of Deposit 1,511 1,511 Party-in-Interest Investments Common Stock 1,538 1,538 Common Bond Fund 4,647 4,647 Common Equity Fund 5,812 5,812 Mutual Funds Taxable Bond 4,536 4,536 Large Cap Equity 18,528 18,528 Mid Cap Equity 8,537 8,537 Small Cap Equity 3,578 3,578 International Equity 3,353 3,353 Specialty Alternative Equity 1,642 1,642 $ 71,396 $ 52,433 $ 18,963 Plan assets are re-balanced quarterly. At December 31, 2016 and 2015 , plan assets by category are as follows: December 31, 2016 December 31, 2015 Actual Target Actual Target Cash and cash equivalents 4.5 % 3.0 % 2.2 % 2.0 % Equity securities 55.8 55.0 58.1 60.0 Debt securities 37.7 40.0 37.4 36.0 Alternative investments 2.0 2.0 2.3 2.0 100.0 % 100.0 % 100.0 % 100.0 %

Income Tax (Tables)

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Reconciliation of Federal Statutory to Actual Tax Expense	The reconciliation between income tax expense expected at the U.S. federal statutory tax rate and the reported income tax expense is summarized in the following table for years ended December 31, 2016 , 2015 , 2014 : 2016 2015 2014 Reconciliation of Federal Statutory to Actual Tax Expense: Federal Statutory Income Tax at 35% $ 38,031 $ 31,867 $ 28,800 Tax-exempt Interest Income (8,749 ) (7,083 ) (5,148 ) Basis Difference on Sale of Insurance Subsidiary 2,252 Stock Compensation 27 34 36 Earnings on Life Insurance (1,486 ) (1,012 ) (1,271 ) Tax Credits (564 ) (583 ) (911 ) Other 350 190 617 Income Tax Expense $ 27,609 $ 25,665 $ 22,123
Components of Income Tax Expense (Benefit)	Income tax expense consists of the following components for the years ended December 31, 2016 , 2015 , 2014 : 2016 2015 2014 Income Tax Expense for the Year Ended December 31: Currently Payable: Federal $ 18,998 $ 21,221 $ 7,075 State Deferred: Federal 8,233 3,952 14,538 State 378 492 510 Income Tax Expense $ 27,609 $ 25,665 $ 22,123
Deferred Tax Assets and Liabilities	Significant components of the net deferred tax assets (liabilities) resulting from temporary differences were as follows at December 31, 2016 and 2015 : 2016 2015 Deferred Tax Asset at December 31: Assets: Differences in Accounting for Loan Losses $ 26,315 $ 25,867 Differences in Accounting for Loan Fees 1,918 762 Differences in Accounting for Loans and Securities 5,689 9,359 Deferred Compensation 3,471 5,100 Difference in Accounting for Pensions and Other Employee Benefits 83 2,247 Federal & State Income Tax Loss Carryforward and Credits 16,643 23,737 Other 4,210 9,310 Total Assets 58,329 76,382 Liabilities: Differences in Depreciation Methods 8,216 7,742 State Income Tax 237 591 Net Unrealized Gain on Securities Available for Sale 557 6,636 Gain on FDIC Modified Whole Bank Transaction 1,126 1,405 Other 623 717 Total Liabilities 10,759 17,091 Net Deferred Tax Asset Before Valuation Allowance 47,570 59,291 Valuation allowance: Beginning Balance (15,736 ) (17,568 ) Decrease/(Increase) During the Year 5,921 1,832 Ending Balance (9,815 ) (15,736 ) Net Deferred Tax Asset $ 37,755 $ 43,555

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Reconciliation of Basic and Diluted Net Income Per Share	The following table reconciles basic and diluted net income per share for the years indicated: 2016 2015 2014 Weighted-Average Shares Weighted-Average Shares Weighted-Average Shares Basic net income per share: Net income available to common stockholders $ 81,051 40,767,343 $ 1.99 $ 65,384 37,816,399 $ 1.73 $ 60,162 36,266,356 $ 1.66 Effect of dilutive stock options and warrants 245,790 271,834 288,253 Diluted net income per share: Net income available to common stockholders $ 81,051 41,013,133 $ 1.98 $ 65,384 38,088,233 $ 1.72 $ 60,162 36,554,609 $ 1.65

Quarterly Results of Operatio57

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Results of Operations (Unaudited)	The following table sets forth certain quarterly results for the years ended December 31, 2016 and 2015 : 2016 2015 First Second Third Fourth First Second Third Fourth Interest income $ 61,227 $ 62,704 $ 64,376 $ 65,005 $ 52,944 $ 55,202 $ 56,538 $ 56,514 Interest expense 6,772 6,742 6,694 6,631 5,968 6,171 6,215 6,440 Net interest income 54,455 55,962 57,682 58,374 46,976 49,031 50,323 50,074 Provision for loan losses 550 790 1,900 2,417 417 Net interest income after provision for loan losses 53,905 55,172 55,782 55,957 46,976 48,614 50,323 50,074 Non-interest income 15,837 16,385 16,861 16,120 15,399 24,106 16,332 14,031 Non-interest expense 46,475 44,835 44,115 41,934 40,369 45,896 43,031 45,510 Income before income tax expense 23,267 26,722 28,528 30,143 22,006 26,824 23,624 18,595 Income tax expense 5,574 6,716 7,469 7,850 5,834 8,856 6,557 4,418 Net income available to common stockholders $ 17,693 $ 20,006 $ 21,059 $ 22,293 $ 16,172 $ 17,968 $ 17,067 $ 14,177 Basic EPS $ 0.43 $ 0.50 $ 0.51 $ 0.55 $ 0.43 $ 0.47 $ 0.46 $ 0.37 Diluted EPS $ 0.43 $ 0.49 $ 0.51 $ 0.55 $ 0.43 $ 0.47 $ 0.45 $ 0.37 Average Shares Outstanding: Basic 40,690,573 40,751,720 40,779,423 40,846,650 37,709,883 37,793,448 37,850,827 37,908,873 Diluted 40,916,972 40,969,111 41,025,784 41,124,179 38,000,074 38,043,359 38,118,199 38,190,694

Condensed Financial Informati58

Condensed Financial Information (parent company only) (Tables)	12 Months Ended
	Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Parent Company Information, Condensed Balance Sheets	Condensed Balance Sheets December 31, 2016 December 31, 2015 Assets Cash $ 31,944 $ 43,622 Investment in subsidiaries 978,291 932,372 Investment securities 18,765 Premises and equipment 1,260 1,361 Interest receivable 47 47 Goodwill 448 448 Cash surrender value of life insurance 1,082 1,041 Tax asset, deferred and receivable 521 2,024 Other assets 5,274 5,195 Total assets $ 1,037,632 $ 986,110 Liabilities Subordinated debentures and term loans $ 127,427 $ 127,663 Interest payable 880 873 Other liabilities 7,668 7,065 Total liabilities 135,975 135,601 Stockholders' equity 901,657 850,509 Total liabilities and stockholders' equity $ 1,037,632 $ 986,110
Schedule of Parent Company Information, Condensed Statements of Income and Comprehensive Income	Condensed Statements of Income and Comprehensive Income December 31, 2016 December 31, 2015 December 31, 2014 Income Dividends from subsidiaries $ 33,546 $ 39,032 $ 53,231 Gain on the sale of insurance subsidiary 8,265 Gain on cancellation of subordinated debentures 1,250 Other income 143 197 538 Total income 33,689 48,744 53,769 Expenses Interest expense 7,185 6,661 6,616 Salaries and employee benefits 639 3,023 3,128 Net occupancy and equipment expenses 832 464 442 Other outside services 967 1,455 458 Professional services 279 636 409 Other expenses (470 ) 1,234 1,132 Total expenses 9,432 13,473 12,185 Income before income tax benefit (expense) and equity in undistributed income of subsidiaries 24,257 35,271 41,584 Income tax benefit (expense) 3,243 (974 ) 3,999 Income before equity in undistributed income of subsidiaries 27,500 34,297 45,583 Equity in undistributed (distributions in excess of) income of subsidiaries 53,551 31,087 14,579 Net income available to common stockholders $ 81,051 $ 65,384 $ 60,162 Net income $ 81,051 $ 65,384 $ 60,162 Other comprehensive income (loss) (12,219 ) 268 4,780 Comprehensive income $ 68,832 $ 65,652 $ 64,942
Schedule of Parent Company Information, Condensed Statement of Cash Flows	Condensed Statement of Cash Flows Year Ended December 31, 2016 2015 2014 Cash Flow From Operating Activities: Net income $ 81,051 $ 65,384 $ 60,162 Adjustments to Reconcile Net Income to Net Cash: Share-based compensation 1,166 843 887 Distributions in excess of (equity in undistributed) income of subsidiaries (53,551 ) (31,087 ) (14,579 ) Gain on sale of insurance subsidiary (8,265 ) Gain on cancellation of subordinated debentures (1,250 ) Net Change in: Other assets 833 (441 ) 2,425 Other liabilities 849 (1,486 ) 1,466 Investment in subsidiaries - operating activities (1,938 ) 197 (4,517 ) Net cash provided by operating activities 28,410 23,895 45,844 Cash Flow From Investing Activities: Purchase of securities available for sale (19,804 ) Net cash paid in acquisition (14,500 ) (12,832 ) Proceeds from business divestitures 16,000 Other 575 Net cash provided (used) in investing activities (19,804 ) 2,075 (12,832 ) Cash Flow From Financing Activities: Cash dividends (22,203 ) (15,654 ) (10,694 ) Repayment of borrowings (3,750 ) Proceeds from issuance of long-term debt Preferred stock redemption under small business lending fund Stock issued under employee benefit plans 462 460 478 Stock issued under dividend reinvestment and stock purchase plan 835 661 523 Stock options exercised 2,602 1,531 564 Stock redeemed (1,980 ) (1,640 ) (1,067 ) Net cash used by financing activities (20,284 ) (18,392 ) (10,196 ) Cash, beginning of the year 43,622 36,044 13,228 Cash, end of year $ 31,944 $ 43,622 $ 36,044

Nature of Operations and Summ59

Nature of Operations and Summary of Significant Accounting Policies - Allowance for Loan Losses (Details)	12 Months Ended
	Dec. 31, 2016USD ($)key_element
Accounting Policies [Abstract]
Number of key element used in assessing the appropriateness of the allowance for loan losses | key_element	3
Commercial relationships threshold that exhibit credit weaknesses | $	$ 500,000

Nature of Operations and Summ60

Nature of Operations and Summary of Significant Accounting Policies - Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2016
Minimum
Premises and Equipment [Line Items]
Estimated useful lives of assets	3 years
Maximum
Premises and Equipment [Line Items]
Estimated useful lives of assets	40 years

Nature of Operations and Summ61

Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2016
Minimum
Intangible Assets [Abstract]
Estimated useful lives of intangible assets	3 years
Maximum
Intangible Assets [Abstract]
Estimated useful lives of intangible assets	20 years

Nature of Operations and Summ62

Nature of Operations and Summary of Significant Accounting Policies - Requisite Service Period, Stock Award Plans (Details)	12 Months Ended
	Dec. 31, 2016
Minimum
Schedule of Stock Options and Restricted Stock Award Plans [Line Items]
Requisite service period	2 years
Maximum
Schedule of Stock Options and Restricted Stock Award Plans [Line Items]
Requisite service period	3 years

Acquisitions and Divestitures -

Acquisitions and Divestitures - Acquisitions Narrative (Details) $ / shares in Units, $ in Thousands	Dec. 31, 2015USD ($)bank_branchshares	Apr. 17, 2015USD ($)bank_branch$ / shares	Nov. 07, 2014USD ($)bank_branch$ / sharesshares	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares
Business Acquisition [Line Items]
Value of stock issued as a part of acquisition					$ 70,402	$ 34,981
Cash paid in acquisition					14,500	$ 14,208
Pro forma nonrecurring expense					$ 12,000
Common Stock
Business Acquisition [Line Items]
Stock issued as a part of acquisition (in shares) | shares					2,769,568	1,574,298
Value of stock issued as a part of acquisition					$ 346	$ 197
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%				100.00%
Number of banking centers acquired | bank_branch	13
Stock issued as a part of acquisition (in shares) | shares	2,800,000
Value of stock issued as a part of acquisition	$ 70,400
Core deposit intangible	$ 5,342				$ 5,342
Acquired intangible asset, expected useful life	10 years
Total purchase price	$ 70,402				$ 70,402
Merger with Ameriana Bancorp | Common Stock
Business Acquisition [Line Items]
Number of shares of common stock	0.9037				0.9037
Merger with C Financial Corporation
Business Acquisition [Line Items]
Percentage of interest acquired		100.00%
Number of banking centers acquired | bank_branch		6
Core deposit intangible		$ 981
Acquired intangible asset, expected useful life		10 years
Total purchase price		$ 14,500
Cash received by shareholders for each share of common stock held (in dollars per share) | $ / shares		$ 6.738
Merger with Community Bancshares, Inc.
Business Acquisition [Line Items]
Percentage of interest acquired			100.00%
Number of banking centers acquired | bank_branch			10
Stock issued as a part of acquisition (in shares) | shares			1,600,000
Value of stock issued as a part of acquisition			$ 35,000
Core deposit intangible			$ 4,658
Acquired intangible asset, expected useful life			10 years
Total purchase price			$ 49,189
Share price (in dollars per share) | $ / shares			$ 85.94
Cash paid in acquisition			$ 14,200
Pro forma nonrecurring expense						1,800
Pro forma revenue						$ 1,600
Merger with Community Bancshares, Inc. | Common Stock
Business Acquisition [Line Items]
Number of shares of common stock			4.0926

Acquisitions and Divestitures64

Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014	Nov. 07, 2014
Business Acquisition [Line Items]
Goodwill	$ 244,000	$ 243,129		$ 202,724
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Cash and cash equivalents		4,068
Interest-bearing time deposits		8,790
Investment Securities, available for sale		61,754
Loans		316,929
Premises and equipment		13,946
Federal Home Loan Bank stock		2,693
Other real estate owned		5,613
Interest receivable		1,306
Cash surrender value of life insurance		28,188
Other assets		6,713
Deposits		(383,718)
Interest payable		(24)
Federal Home Loan Bank advances		(24,884)
Subordinated Debentures		(5,487)
Other liabilities		(9,451)
Net tangible assets acquired		26,436
Core deposit intangible		5,342
Goodwill		38,624
Purchase price		$ 70,402
Merger with C Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents			$ 2,496
Federal Funds sold			7,018
Interest-bearing time deposits			922
Loans			110,625
Premises and equipment			7,290
Federal Home Loan Bank stock			855
Interest receivable			292
Other assets			119
Deposits			(105,326)
Interest payable			(29)
Federal Home Loan Bank advances			(18,958)
Other liabilities			(2,911)
Net tangible assets acquired			2,393
Core deposit intangible			981
Goodwill			11,126
Purchase price			$ 14,500
Merger with Community Bancshares, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents					$ 4,124
Interest-bearing time deposits					16,526
Investment Securities, available for sale					76,807
Loans					145,064
Premises and equipment					3,610
Federal Home Loan Bank stock					1,950
Other real estate owned					6,662
Interest receivable					767
Cash surrender value of life insurance					3,266
Tax asset, deferred and receivable					3,348
Other assets					167
Deposits					(228,424)
Interest payable					(98)
Other liabilities					(3,014)
Net tangible assets acquired					30,755
Core deposit intangible					4,658
Goodwill					13,776
Purchase price					$ 49,189

Acquisitions and Divestitures65

Acquisitions and Divestitures - First Merchants Insurance Services, Inc. Narrative (Details) - FMIG $ in Millions	Jun. 12, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price	$ 18
Amount paid at closing	16
Promissory note	$ 2
Term of promissory note (in years)	2 years
Gain on sale of subsidiary	$ 8.3

Acquisitions and Divestitures66

Acquisitions and Divestitures - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Combinations [Abstract]
Total revenue (net interest income plus other income)	$ 291,614	$ 284,890
Net income	60,497	64,174
Net income available to common shareholders	$ 60,497	$ 64,174
Earnings per share:
Basic (in dollars per share)	$ 1.49	$ 1.58
Diluted (in dollars per share)	$ 1.48	$ 1.57

Restriction on Cash and Due F67

Restriction on Cash and Due From Banks (Details) $ in Thousands	Dec. 31, 2016USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Cash balance, Federal Home Loan Bank And Federal Reserve Bank	$ 5,969
Cash reserve with Federal Reserve Bank	24,153
Interest-bearing Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Cash amount that exceeded federally insured limits	$ 87,431

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Approximate Fair Values of Securities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Total available for sale
Amortized Cost	$ 696,189,000	$ 640,499,000
Gross Unrealized Gains	10,347,000	18,479,000
Gross Unrealized Losses	9,674,000	578,000
Investment securities available for sale	696,862,000	658,400,000
Total held to maturity
Amortized Cost	607,643,000	618,599,000
Gross Unrealized Gains	8,092,000	14,583,000
Gross Unrealized Losses	3,802,000	802,000
Fair Value	611,933,000	632,380,000
Total Investment Securities
Amortized Cost	1,303,832,000	1,259,098,000
Gross Unrealized Gains	18,439,000	33,062,000
Gross Unrealized Losses	13,476,000	1,380,000
Fair Value	1,308,795,000	1,290,780,000
U.S. Government-sponsored agency securities
Total available for sale
Amortized Cost	100,000	100,000
Gross Unrealized Gains		4,000
Gross Unrealized Losses	0
Investment securities available for sale	100,000	104,000
Total held to maturity
Amortized Cost	22,619,000
Gross Unrealized Losses	479,000
Fair Value	22,140,000
State and municipal
Total available for sale
Amortized Cost	360,779,000	291,730,000
Gross Unrealized Gains	8,443,000	14,241,000
Gross Unrealized Losses	5,564,000	60,000
Investment securities available for sale	363,658,000	305,911,000
Total held to maturity
Amortized Cost	224,811,000	219,767,000
Gross Unrealized Gains	3,136,000	6,982,000
Gross Unrealized Losses	1,796,000	15,000
Fair Value	226,151,000	226,734,000
U.S. Government-sponsored mortgage-backed securities
Total available for sale
Amortized Cost	313,459,000	342,550,000
Gross Unrealized Gains	1,904,000	4,234,000
Gross Unrealized Losses	3,071,000	518,000
Investment securities available for sale	312,292,000	346,266,000
Total held to maturity
Amortized Cost	360,213,000	398,832,000
Gross Unrealized Gains	4,956,000	7,601,000
Gross Unrealized Losses	1,527,000	787,000
Fair Value	363,642,000	405,646,000
Corporate obligations
Total available for sale
Amortized Cost	31,000	31,000
Gross Unrealized Gains
Gross Unrealized Losses
Investment securities available for sale	31,000	31,000
Equity securities
Total available for sale
Amortized Cost	21,820,000	3,912,000
Gross Unrealized Gains
Gross Unrealized Losses	1,039,000
Investment securities available for sale	20,781,000	3,912,000
Total held to maturity
Gross Unrealized Losses	$ 0
Certificates of deposit
Total available for sale
Amortized Cost		2,176,000
Investment securities available for sale		$ 2,176,000

Investment Securities - Narrati

Investment Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2016USD ($)security	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Fair value of investments	$ 510,297,000	$ 177,584,000
Unrealized losses on mortgage-backed securities portfolio	9,674,000	578,000
Unrealized losses in available for sale and held to maturity portfolios	3,802,000	802,000
Carrying value of securities pledged as collateral	572,896,000	637,358,000	$ 449,408,000
Securities sold under repurchase agreements	145,936,000	153,789,000
Gross gains on securities sold	3,389,000	2,770,000	3,581,000
Gross losses from sale of available for sale securities	0	100,000	$ 0
Investments in Debt and Equity Securities, Reported at Less than Historical Cost
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Historical cost	523,773,000	178,964,000
Fair value of investments	$ 510,297,000	$ 177,584,000
Percent of the Corporation's available for sale and held to maturity portfolio	39.10%	13.90%
U.S. Government-Sponsored Mortgage-backed Securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Unrealized losses on mortgage-backed securities portfolio	$ 3,071,000	$ 518,000
Available-for-sale, number of securities in unrealized loss positions | security	46
Unrealized losses in available for sale and held to maturity portfolios	$ 1,527,000	787,000
Held-to-maturity, number of securities in unrealized loss positions | security	29
State and Municipal Securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Unrealized losses on mortgage-backed securities portfolio	$ 5,564,000	60,000
Available-for-sale, number of securities in unrealized loss positions | security	108
Unrealized losses in available for sale and held to maturity portfolios	$ 1,796,000	15,000
Held-to-maturity, number of securities in unrealized loss positions | security	71
U.S. Government-sponsored agency securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Unrealized losses on mortgage-backed securities portfolio	$ 0
Available-for-sale, number of securities in unrealized loss positions | security	0
Unrealized losses in available for sale and held to maturity portfolios	$ 479,000
Held-to-maturity, number of securities in unrealized loss positions | security	4
Equity securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Unrealized losses on mortgage-backed securities portfolio	$ 1,039,000
Available-for-sale, number of securities in unrealized loss positions | security	1
Unrealized losses in available for sale and held to maturity portfolios	$ 0
Held-to-maturity, number of securities in unrealized loss positions | security	0

Investment Securities - Debt Se

Investment Securities - Debt Securities Credit Loss Recognized in Income, and Other Losses Recorded in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Credit losses on debt securities held:
Balance, beginning of the period	$ 0	$ 500
Reductions for previous other-than-temporary losses realized on securities sold during the year	0	(500)
Balance, end of period	$ 0	$ 0

Investment Securities - Investm

Investment Securities - Investments' Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	$ 330,902	$ 90,954
Less than 12 Months, Gross Unrealized Losses	9,674	505
12 Months or Longer, Fair Value		2,101
12 Months or Longer, Gross Unrealized Losses		73
Total, Fair Value	330,902	93,055
Total, Gross Unrealized Losses	9,674	578
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	179,395	69,641
Less than 12 Months, Gross Unrealized Losses	3,802	519
12 Months or Longer, Fair Value		14,888
12 Months or Longer, Gross Unrealized Losses		283
Total, Fair Value	179,395	84,529
Total, Gross Unrealized Losses	3,802	802
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Less than 12 Months, Fair Value	510,297	160,595
Less than 12 Months, Gross Unrealized Losses	13,476	1,024
12 Months or Longer, Fair Value		16,989
12 Months or Longer, Gross Unrealized Losses		356
Total, Fair Value	510,297	177,584
Total, Gross Unrealized Losses	13,476	1,380
State and municipal
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	126,593	7,558
Less than 12 Months, Gross Unrealized Losses	5,564	60
12 Months or Longer, Fair Value
12 Months or Longer, Gross Unrealized Losses
Total, Fair Value	126,593	7,558
Total, Gross Unrealized Losses	5,564	60
U.S. Government-sponsored mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	185,544	83,396
Less than 12 Months, Gross Unrealized Losses	3,071	445
12 Months or Longer, Fair Value		2,101
12 Months or Longer, Gross Unrealized Losses		73
Total, Fair Value	185,544	85,497
Total, Gross Unrealized Losses	3,071	518
Equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	18,765
Less than 12 Months, Gross Unrealized Losses	1,039
Total, Fair Value	18,765
Total, Gross Unrealized Losses	1,039
Government Agency and Municipal Bonds and Notes
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	19,121
Less than 12 Months, Gross Unrealized Losses	479
Total, Fair Value	19,121
Total, Gross Unrealized Losses	479
State and municipal
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	50,897
Less than 12 Months, Gross Unrealized Losses	1,796
12 Months or Longer, Fair Value		1,982
12 Months or Longer, Gross Unrealized Losses		15
Total, Fair Value	50,897	1,982
Total, Gross Unrealized Losses	1,796	15
U.S. Government-sponsored mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	109,377	69,641
Less than 12 Months, Gross Unrealized Losses	1,527	519
12 Months or Longer, Fair Value		12,906
12 Months or Longer, Gross Unrealized Losses		268
Total, Fair Value	109,377	82,547
Total, Gross Unrealized Losses	$ 1,527	$ 787

Investment Securities - Amort72

Investment Securities - Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available for Sale, Amortized Cost
Due in one year or less	$ 2,703
Due after one through five years	16,359
Due after five through ten years	60,614
Due after ten years	281,234
Amortized Cost	360,910
Total Investment Securities	696,189
Available for Sale, Fair Value
Due in one year or less	2,717
Due after one through five years	17,068
Due after five through ten years	62,241
Due after ten years	281,763
Fair Value	363,789
Total Investment Securities	696,862
Held to Maturity, Amortized Cost
Due in one year or less	2,046
Due after one through five years	61,921
Due after five through ten years	61,606
Due after ten years	121,857
Amortized Cost	247,430
Amortized Cost	607,643	$ 618,599
Held to Maturity, Fair Value
Due in one year or less	2,047
Due after one through five years	63,193
Due after five through ten years	61,145
Due after ten years	121,906
Fair Value	248,291
Total Investment Securities	611,933	632,380
U.S. Government-sponsored mortgage-backed securities
Available for Sale, Amortized Cost
Without single maturity date	313,459
Available for Sale, Fair Value
Without single maturity date	312,292
Held to Maturity, Amortized Cost
Without single maturity date	360,213
Amortized Cost	360,213	398,832
Held to Maturity, Fair Value
Without single maturity date	363,642
Total Investment Securities	363,642	$ 405,646
Equity securities
Available for Sale, Amortized Cost
Without single maturity date	21,820
Available for Sale, Fair Value
Without single maturity date	$ 20,781

Loans and Allowance - Narrative

Loans and Allowance - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 2,929				$ 9,894				$ 2,929	$ 9,894
Allowance for loan losses	66,037				62,453				66,037	62,453	$ 63,964	$ 67,870
Increase in allowance for loan losses									3,584
Net charge offs									2,073
Increase in net charge offs									145
Provision for loan losses	2,417	$ 1,900	$ 790	$ 550			$ 417		5,657	417	2,560
Increase in provision for loan losses									5,240
Commercial impaired loan total	72,050				97,527				$ 72,050	97,527	116,223
Merger with Ameriana Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial impaired loan total					11,365					11,365
Merger with C Financial Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial impaired loan total					1,841					1,841
Merger with Community Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial impaired loan total											17,027
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of troubled debt restructured loans									56.00%
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	11,755				11,139				$ 11,755	11,139	13,152	15,077
Provision for loan losses									1,515	310	(839)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,923				2,689				2,923	2,689	2,658	$ 2,515
Provision for loan losses									432	299	$ 423
Mortgage loans for which formal foreclosure proceedings are in process	$ 1,530				$ 1,391				$ 1,530	$ 1,391

Loans and Allowance - Compositi

Loans and Allowance - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,139,645	$ 4,693,822
Allowance for loan losses	(66,037)	(62,453)	$ (63,964)	$ (67,870)
Net Loans	5,073,608	4,631,369
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,194,646	1,057,075
Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	79,689	97,711
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	418,703	366,704
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,953,062	1,802,921
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	739,169	786,105
Allowance for loan losses	(11,755)	(11,139)	(13,152)	(15,077)
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	418,525	348,613
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	77,479	74,717
Allowance for loan losses	(2,923)	(2,689)	(2,658)	(2,515)
Lease financing receivables, net of unearned income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	311	588
Allowance for loan losses	(2)	(2)	$ (3)
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 258,061	$ 159,388

Loans and Allowance - Changes i

Loans and Allowance - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses:
Beginning balance				$ 62,453				$ 63,964	$ 62,453	$ 63,964	$ 67,870
Provision for losses	$ 2,417	$ 1,900	$ 790	550			$ 417		5,657	417	2,560
Recoveries on loans									5,356	6,344	10,916
Loans charged off									(7,429)	(8,272)	(17,382)
Ending balance	66,037				62,453				66,037	62,453	63,964
Commercial
Allowance for loan losses:
Beginning balance				26,478				28,824	26,478	28,824	27,176
Provision for losses									1,876	(1,901)	3,459
Recoveries on loans									1,806	1,911	5,435
Loans charged off									(2,464)	(2,356)	(7,246)
Ending balance	27,696				26,478				27,696	26,478	28,824
Commercial Real Estate
Allowance for loan losses:
Beginning balance				22,145				19,327	22,145	19,327	23,102
Provision for losses									1,834	1,710	(464)
Recoveries on loans									2,090	2,545	3,297
Loans charged off									(2,408)	(1,437)	(6,608)
Ending balance	23,661				22,145				23,661	22,145	19,327
Consumer
Allowance for loan losses:
Beginning balance				2,689				2,658	2,689	2,658	2,515
Provision for losses									432	299	423
Recoveries on loans									369	352	377
Loans charged off									(567)	(620)	(657)
Ending balance	2,923				2,689				2,923	2,689	2,658
Residential
Allowance for loan losses:
Beginning balance				11,139				13,152	11,139	13,152	15,077
Provision for losses									1,515	310	(839)
Recoveries on loans									1,091	1,536	1,783
Loans charged off									(1,990)	(3,859)	(2,869)
Ending balance	11,755				11,139				11,755	11,139	13,152
Finance Leases
Allowance for loan losses:
Beginning balance				$ 2				$ 3	2	3
Provision for losses										(1)	(19)
Recoveries on loans											24
Loans charged off											(2)
Ending balance	$ 2				$ 2				$ 2	$ 2	$ 3

Loans and Allowance - Allowance

Loans and Allowance - Allowance for Credit Losses and Loan Portfolio by Loan Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	$ 888	$ 1,689
Allowance balances - Collectively evaluated for impairment	65,149	60,611
Allowance balances - Loans Acquired with Deteriorated Credit Quality		153
Total Allowance for Loan Losses	66,037	62,453	$ 63,964	$ 67,870
Loan balances - Individually evaluated for impairment	30,579	28,567
Loan balances - Collectively evaluated for impairment	5,065,844	4,595,698
Loans	5,139,645	4,693,822
Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	43,222	69,557
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	37	1,277
Allowance balances - Collectively evaluated for impairment	27,659	25,201
Allowance balances - Loans Acquired with Deteriorated Credit Quality
Total Allowance for Loan Losses	27,696	26,478	28,824	27,176
Loan balances - Individually evaluated for impairment	4,762	7,877
Loan balances - Collectively evaluated for impairment	1,520,981	1,298,988
Loans	1,532,396	1,314,174
Commercial | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	6,653	7,309
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	553	243
Allowance balances - Collectively evaluated for impairment	23,108	21,753
Allowance balances - Loans Acquired with Deteriorated Credit Quality		149
Total Allowance for Loan Losses	23,661	22,145	19,327	23,102
Loan balances - Individually evaluated for impairment	21,358	16,670
Loan balances - Collectively evaluated for impairment	2,315,686	2,096,089
Loans	2,371,765	2,169,625
Commercial Real Estate | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	34,721	56,866
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment
Allowance balances - Collectively evaluated for impairment	2,923	2,689
Allowance balances - Loans Acquired with Deteriorated Credit Quality
Total Allowance for Loan Losses	2,923	2,689	2,658	2,515
Loan balances - Individually evaluated for impairment	9
Loan balances - Collectively evaluated for impairment	77,470	74,717
Loans	77,479	74,717
Consumer | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality
Residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	298	169
Allowance balances - Collectively evaluated for impairment	11,457	10,966
Allowance balances - Loans Acquired with Deteriorated Credit Quality		4
Total Allowance for Loan Losses	11,755	11,139	13,152	15,077
Loan balances - Individually evaluated for impairment	4,450	4,020
Loan balances - Collectively evaluated for impairment	1,151,396	1,125,316
Loans	1,157,694	1,134,718
Residential | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	1,848	5,382
Finance Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment
Allowance balances - Collectively evaluated for impairment	2	2
Allowance balances - Loans Acquired with Deteriorated Credit Quality
Total Allowance for Loan Losses	2	2	$ 3
Loan balances - Individually evaluated for impairment
Loan balances - Collectively evaluated for impairment	311	588
Loans	311	588
Finance Leases | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality

Loans and Allowance - Summary o

Loans and Allowance - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 29,998	$ 31,389
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,839	4,634
Agriculture production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,329	827
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	73	736
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	15,754	11,277
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	9,523	11,818
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,457	1,952
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 23	$ 145

Loans and Allowance - Composi78

Loans and Allowance - Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unpaid Principal Balance
Impaired loans with no related allowance	$ 100,416	$ 134,581	$ 158,563
Impaired loans with related allowance	4,963	7,953	16,703
Total Impaired Loans	105,379	142,534	175,266
Recorded Investment
Impaired loans with no related allowance	68,371	90,975	102,793
Impaired loans with related allowance	3,679	6,552	13,430
Total Impaired Loans	72,050	97,527	116,223
Related Allowance	612	1,842	2,769
Average Recorded Investment
Impaired loans with no related allowance	74,592	96,423	106,807
Impaired loans with related allowance	3,718	6,945	15,764
Total Impaired Loans	78,310	103,368	122,571
Interest Income Recognized
Impaired loans with no related allowance	3,905	4,217	4,297
Impaired loans with related allowance		38	65
Total Impaired Loans	3,905	4,255	4,362
Commercial and industrial loans
Unpaid Principal Balance
Impaired loans with no related allowance	17,645	22,151	35,514
Impaired loans with related allowance		3,043	1,766
Recorded Investment
Impaired loans with no related allowance	10,074	11,669	18,029
Impaired loans with related allowance		2,690	1,684
Related Allowance		1,247	1,055
Average Recorded Investment
Impaired loans with no related allowance	13,393	12,578	18,711
Impaired loans with related allowance		2,752	1,721
Interest Income Recognized
Impaired loans with no related allowance	499	488	362
Impaired loans with related allowance		38	40
Agriculture production financing and other loans to farmers
Unpaid Principal Balance
Impaired loans with no related allowance	757	370	26
Impaired loans with related allowance	660	466	6,777
Recorded Investment
Impaired loans with no related allowance	680	361	22
Impaired loans with related allowance	660	466	5,777
Related Allowance	36	30	400
Average Recorded Investment
Impaired loans with no related allowance	750	439	26
Impaired loans with related allowance	691	538	8,044
Interest Income Recognized
Impaired loans with no related allowance	3
Impaired loans with related allowance			1
Construction
Unpaid Principal Balance
Impaired loans with no related allowance	5,946	4,551	12,956
Recorded Investment
Impaired loans with no related allowance	3,178	2,336	9,318
Average Recorded Investment
Impaired loans with no related allowance	3,255	3,662	9,837
Interest Income Recognized
Impaired loans with no related allowance	258	157	427
Commercial and farmland
Unpaid Principal Balance
Impaired loans with no related allowance	67,936	95,930	95,856
Impaired loans with related allowance	4,238	2,144	7,159
Recorded Investment
Impaired loans with no related allowance	49,731	69,024	68,187
Impaired loans with related allowance	2,985	1,933	4,971
Related Allowance	553	392	1,120
Average Recorded Investment
Impaired loans with no related allowance	51,740	71,569	70,844
Impaired loans with related allowance	2,989	1,868	4,999
Interest Income Recognized
Impaired loans with no related allowance	2,978	3,328	3,389
Impaired loans with related allowance			24
Residential
Unpaid Principal Balance
Impaired loans with no related allowance	8,039	11,262	10,591
Impaired loans with related allowance	65	2,300	1,001
Recorded Investment
Impaired loans with no related allowance	4,664	7,338	6,839
Impaired loans with related allowance	34	1,463	998
Related Allowance	23	173	194
Average Recorded Investment
Impaired loans with no related allowance	5,410	7,926	6,987
Impaired loans with related allowance	38	1,787	1,000
Interest Income Recognized
Impaired loans with no related allowance	167	244	119
Impaired loans with related allowance
Home equity
Unpaid Principal Balance
Impaired loans with no related allowance	82	297	3,590
Recorded Investment
Impaired loans with no related allowance	44	247	398
Average Recorded Investment
Impaired loans with no related allowance	44	249	402
Interest Income Recognized
Impaired loans with no related allowance
Other commercial loans
Unpaid Principal Balance
Impaired loans with no related allowance	11	20	30
Recorded Investment
Impaired loans with no related allowance
Average Recorded Investment
Impaired loans with no related allowance
Interest Income Recognized
Impaired loans with no related allowance

Loans and Allowance - Credit Qu

Loans and Allowance - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 5,139,645	$ 4,693,822
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,194,646	1,057,075
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	79,689	97,711
Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	418,703	366,704
Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,953,062	1,802,921
Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	739,169	786,105
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	418,525	348,613
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	77,479	74,717
Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	311	588
Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	258,061	159,388
Commercial Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	3,769,920	3,404,491
Commercial Pass | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,117,545	962,340
Commercial Pass | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	30,712	77,884
Commercial Pass | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	398,646	345,449
Commercial Pass | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,811,367	1,679,141
Commercial Pass | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	146,251	171,576
Commercial Pass | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	7,310	8,218
Commercial Pass | Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	228	495
Commercial Pass | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	257,861	159,388
Commercial Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	124,863	105,965
Commercial Special Mention | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	30,919	48,432
Commercial Special Mention | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	25,273	6,665
Commercial Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	3,490	1,271
Commercial Special Mention | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	60,028	46,442
Commercial Special Mention | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	5,106	3,107
Commercial Special Mention | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	47	48
Commercial Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	159,215	149,395
Commercial Substandard | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	46,182	45,984
Commercial Substandard | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	23,704	13,162
Commercial Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	1,858	1,790
Commercial Substandard | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	80,626	77,338
Commercial Substandard | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	6,046	10,428
Commercial Substandard | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	516	600
Commercial Substandard | Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	83	93
Commercial Substandard | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	200
Commercial Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans		319
Commercial Doubtful | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans		319
Commercial Doubtful | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	1,076,417	1,023,856
Consumer Performing | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	14,636	18,114
Consumer Performing | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,034
Consumer Performing | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	574,054	593,533
Consumer Performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	409,237	337,718
Consumer Performing | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	77,456	74,491
Consumer Non Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	9,230	9,796
Consumer Non Performing | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	73	80
Consumer Non Performing | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	7
Consumer Non Performing | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	7,712	7,461
Consumer Non Performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	1,415	2,029
Consumer Non Performing | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 23	$ 226

Loans and Allowance - Past Due

Loans and Allowance - Past Due Aging of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 5,095,918	$ 4,641,215
Loans 90 Days And Accruing	112	907
Non-Accrual	29,998	31,389
Total Past Due & Non-Accrual	43,727	52,607
Total	5,139,645	4,693,822
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,490	17,570
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,127	2,741
Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,192,079	1,052,275
Loans 90 Days And Accruing	100
Non-Accrual	1,839	4,634
Total Past Due & Non-Accrual	2,567	4,800
Total	1,194,646	1,057,075
Commercial and industrial loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	466	166
Commercial and industrial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	162
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	78,360	96,884
Loans 90 Days And Accruing
Non-Accrual	1,329	827
Total Past Due & Non-Accrual	1,329	827
Total	79,689	97,711
Agricultural production financing and other loans to farmers | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Agricultural production financing and other loans to farmers | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	415,975	362,084
Non-Accrual	73	736
Total Past Due & Non-Accrual	2,728	4,620
Total	418,703	366,704
Construction | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,655	3,884
Construction | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,932,896	1,786,092
Loans 90 Days And Accruing
Non-Accrual	15,754	11,277
Total Past Due & Non-Accrual	20,166	16,829
Total	1,953,062	1,802,921
Commercial and farmland | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,385	5,552
Commercial and farmland | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,027
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	725,338	765,634
Loans 90 Days And Accruing	9	502
Non-Accrual	9,523	11,818
Total Past Due & Non-Accrual	13,831	20,471
Total	739,169	786,105
Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,664	6,090
Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	635	2,061
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	415,969	344,344
Loans 90 Days And Accruing	3	324
Non-Accrual	1,457	1,952
Total Past Due & Non-Accrual	2,556	4,269
Total	418,525	348,613
Home equity | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	850	1,433
Home equity | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	246	560
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	76,929	73,990
Loans 90 Days And Accruing		81
Non-Accrual	23	145
Total Past Due & Non-Accrual	550	727
Total	77,479	74,717
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	470	445
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	57	56
Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	311	588
Non-Accrual
Total Past Due & Non-Accrual
Total	311	588
Other commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	258,061	159,324
Non-Accrual
Total Past Due & Non-Accrual		64
Total	258,061	159,388
Other commercial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		$ 64

Loans and Allowance - Summary81

Loans and Allowance - Summary of Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)loan	Dec. 31, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 7,165	$ 5,960
Post-Modification Recorded Balance	$ 7,035	$ 6,601
Number of Loans | loan	37	23
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 410	$ 4,111
Post-Modification Recorded Balance	$ 410	$ 2,115
Number of Loans | loan	4	7
Agriculture production financing and other loans to farmers
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 1,368
Post-Modification Recorded Balance	$ 1,234
Number of Loans | loan	4
Construction
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		$ 79
Post-Modification Recorded Balance		$ 80
Number of Loans | loan		1
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 3,978	$ 1,281
Post-Modification Recorded Balance	$ 3,954	$ 3,024
Number of Loans | loan	7	3
Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 1,126	$ 200
Post-Modification Recorded Balance	$ 1,183	$ 1,113
Number of Loans | loan	17	10
Home equity
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 266	$ 263
Post-Modification Recorded Balance	$ 244	$ 242
Number of Loans | loan	4	1
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 17	$ 26
Post-Modification Recorded Balance	$ 10	$ 27
Number of Loans | loan	1	1

Loans and Allowance - Summary82

Loans and Allowance - Summary of Troubled Debt Restructurings by Modification (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Total Modification	$ 6,263	$ 5,378
Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	1,195	2,815
Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	1,215	439
Combination
Financing Receivable, Modifications [Line Items]
Total Modification	3,853	2,124
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Total Modification	397	1,814
Commercial and industrial loans | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification		761
Commercial and industrial loans | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	397	1,053
Agriculture production financing and other loans to farmers
Financing Receivable, Modifications [Line Items]
Total Modification	672
Agriculture production financing and other loans to farmers | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	660
Agriculture production financing and other loans to farmers | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	12
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Total Modification	3,753	2,257
Commercial and farmland | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	297	1,231
Commercial and farmland | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Commercial and farmland | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	3,456	1,026
Residential
Financing Receivable, Modifications [Line Items]
Total Modification	1,166	1,038
Residential | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	238	823
Residential | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	928	170
Residential | Combination
Financing Receivable, Modifications [Line Items]
Total Modification		45
Home equity
Financing Receivable, Modifications [Line Items]
Total Modification	266	242
Home equity | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Home equity | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	266	242
Home equity | Combination
Financing Receivable, Modifications [Line Items]
Total Modification
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Total Modification	9	27
Individuals' loans for household and other personal expenditures | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Individuals' loans for household and other personal expenditures | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	$ 9	27
Individuals' loans for household and other personal expenditures | Combination
Financing Receivable, Modifications [Line Items]
Total Modification

Loans and Allowance - Subsequen

Loans and Allowance - Subsequent Default (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)loan	Dec. 31, 2015USD ($)loan
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	6	1
Recorded Balance | $	$ 1,265	$ 21
Commercial and industrial loans
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	3
Recorded Balance | $	$ 197
Agriculture production financing and other loans to farmers
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	1
Recorded Balance | $	$ 661
Commercial and farmland
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	1
Recorded Balance | $	$ 343
Residential
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	1	1
Recorded Balance | $	$ 64	$ 21

Accounting for Certain Loans 84

Accounting for Certain Loans Acquired in a Purchase - Carrying Amount of Loans Included in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 698,097	$ 961,382
Carrying Amount	665,417	917,589
Allowance	380	153
Carrying Amount Net of Allowance	665,037	917,436
Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	250,824	330,918
Carrying Amount	240,053	319,664
Allowance	265
Carrying Amount Net of Allowance	239,788	319,664
C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	77,100	99,166
Carrying Amount	75,194	96,829
Carrying Amount Net of Allowance	75,194	96,829
Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	60,108	99,541
Carrying Amount	56,007	93,355
Allowance	23	4
Carrying Amount Net of Allowance	55,984	93,351
CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	279,479	393,014
Carrying Amount	266,845	373,649
Allowance	92	149
Carrying Amount Net of Allowance	266,753	373,500
SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	30,586	38,743
Carrying Amount	27,318	34,092
Carrying Amount Net of Allowance	27,318	34,092
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	37,236	85,441
Commercial and industrial loans | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	8,003	21,888
Commercial and industrial loans | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	85	104
Commercial and industrial loans | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2,269	6,769
Commercial and industrial loans | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	23,327	52,060
Commercial and industrial loans | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	3,552	4,620
Agriculture production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2,710	3,049
Agriculture production financing and other loans to farmers | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,030	1,761
Agriculture production financing and other loans to farmers | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	50
Agriculture production financing and other loans to farmers | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,630	1,288
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	29,298	40,991
Construction | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	22,017	23,365
Construction | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2,835	6,214
Construction | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	4,026	10,436
Construction | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	420	976
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	303,362	425,014
Commercial and farmland | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	103,075	144,514
Commercial and farmland | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	22,130	27,838
Commercial and farmland | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	36,947	49,997
Commercial and farmland | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	131,895	189,372
Commercial and farmland | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	9,315	13,293
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	257,640	325,141
Residential | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	103,414	123,231
Residential | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	44,101	55,856
Residential | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	9,363	21,886
Residential | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	96,627	118,105
Residential | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	4,135	6,063
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	64,819	77,053
Home equity | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	11,728	14,261
Home equity | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	7,947	9,144
Home equity | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	6,326	8,231
Home equity | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	26,894	31,986
Home equity | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	11,924	13,431
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,142	2,693
Individuals' loans for household and other personal expenditures | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	762	1,731
Individuals' loans for household and other personal expenditures | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2	10
Individuals' loans for household and other personal expenditures | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	147	461
Individuals' loans for household and other personal expenditures | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	201	443
Individuals' loans for household and other personal expenditures | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	30	48
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,890	2,000
Other commercial loans | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,825	1,928
Other commercial loans | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 65	$ 72

Accounting for Certain Loans 85

Accounting for Certain Loans Acquired in a Purchase - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Outstanding balance amount of loans acquired	$ 60,500,000	$ 95,800,000
Carrying amount of loans acquired	43,200,000	69,600,000
Allowance for loan losses and provision expense	$ 0	$ 153,000

Accounting for Certain Loans 86

Accounting for Certain Loans Acquired in a Purchase - Accretable Yield or Income Expected to be Collected (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 5,612	$ 5,390	$ 5,552
Additions		2,305	2,234
Accretion	(6,577)	(5,850)	(5,439)
Reclassification from nonaccretable	5,172	3,925	3,249
Disposals	(257)	(158)	(206)
Ending balance	3,950	5,612	5,390
Ameriana
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	2,160
Additions		2,160
Accretion	(311)
Reclassification from nonaccretable	12
Disposals	(232)
Ending balance	1,629	2,160
C Financial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	114
Additions		145
Accretion	(123)	(31)
Reclassification from nonaccretable	82
Ending balance	73	114
Community
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	1,508	2,122
Accretion	(1,119)	(723)	(231)
Reclassification from nonaccretable	858	249	119
Disposals	(14)	(140)
Ending balance	1,233	1,508	2,122
CFS
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	1,188	2,400	4,164
Accretion	(4,268)	(4,050)	(4,146)
Reclassification from nonaccretable	3,827	2,854	2,553
Disposals	(11)	(16)	(171)
Ending balance	736	1,188	2,400
SCB
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	642	868	1,388
Accretion	(756)	(1,046)	(1,062)
Reclassification from nonaccretable	393	822	577
Disposals		(2)	(35)
Ending balance	$ 279	$ 642	$ 868

Accounting for Certain Loans 87

Accounting for Certain Loans Acquired in a Purchase - Contractually Required Payments (Details) $ in Thousands	Dec. 31, 2015USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	$ 25,804
Nonaccretable difference	12,229
Expected cash flows at acquisition date	13,575
Accretable difference	2,305
Basis in loans at acquisition date	11,270
Ameriana
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	23,172
Nonaccretable difference	11,592
Expected cash flows at acquisition date	11,580
Accretable difference	2,160
Basis in loans at acquisition date	9,420
C Financial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	2,632
Nonaccretable difference	637
Expected cash flows at acquisition date	1,995
Accretable difference	145
Basis in loans at acquisition date	$ 1,850

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Premises and Equipment [Line Items]
Total Cost	$ 205,026	$ 206,863
Accumulated Depreciation and Amortization	(110,594)	(109,215)
Net	94,432	97,648
Land
Premises and Equipment [Line Items]
Total Cost	25,035	26,510
Buildings and Leasehold Improvements
Premises and Equipment [Line Items]
Total Cost	114,444	115,461
Equipment
Premises and Equipment [Line Items]
Total Cost	$ 65,547	$ 64,892

Premises and Equipment - Narrat

Premises and Equipment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 17, 2015
Premises and Equipment [Line Items]
Rent expense	$ 4,586	$ 3,456	$ 3,258
Merger with Ameriana Bancorp
Premises and Equipment [Line Items]
Premises and equipment acquired		$ 13,946
Merger with C Financial Corporation
Premises and Equipment [Line Items]
Premises and equipment acquired				$ 7,290

Premises and Equipment - Schedu

Premises and Equipment - Schedule of Future Minimum Rental Payments for Operating Leases (Details) $ in Thousands	Dec. 31, 2016USD ($)
Property, Plant and Equipment [Abstract]
2,017	$ 3,298
2,018	1,998
2,019	1,624
2,020	1,388
2,021	1,056
After 2,021	6,487
Total Future Minimum Obligations	$ 15,851

Goodwill - Narrative (Details)

Goodwill - Narrative (Details) - USD ($)	Jun. 12, 2015	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill			$ 244,000,000	$ 243,129,000		$ 202,724,000
Measurement period adjustment			871,000
Goodwill reduction				8,474,000
Goodwill impairment loss			$ 0	0
FMIG
Business Acquisition [Line Items]
Goodwill reduction	$ 8,474,000
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Goodwill				$ 38,624,000
Measurement period adjustment		$ 871,000
Merger with C Financial Corporation
Business Acquisition [Line Items]
Goodwill					$ 11,126,000

Goodwill - Rollforward (Details

Goodwill - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning balance	$ 243,129	$ 202,724
Goodwill acquired		48,879
Goodwill reduction		(8,474)
Measurement period adjustment	871
Ending balance	$ 244,000	$ 243,129

Core Deposit and Other Intang93

Core Deposit and Other Intangibles - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 12, 2015	Apr. 17, 2015
Business Acquisition [Line Items]
Measurement period adjustment		$ 2,142
Core deposit intangible and other intangibles reduction			742
Core deposit amortization		$ 3,910	2,835	$ 2,445
FMIG
Business Acquisition [Line Items]
Core deposit intangible and other intangibles reduction					$ 742
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Core deposit intangible			$ 5,342
Measurement period adjustment	$ 2,142
Merger with C Financial Corporation
Business Acquisition [Line Items]
Core deposit intangible						$ 981

Core Deposit and Other Intang94

Core Deposit and Other Intangibles - Schedule of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 61,798	$ 58,360
Core deposit intangible and other intangibles acquired		4,181
Measurement period adjustment	2,142
Accumulated amortization	(49,074)	(45,164)
Core deposit intangible and other intangibles reduction		(742)
Core Deposit and Other Intangibles	$ 14,866	$ 16,635

Core Deposit and Other Intang95

Core Deposit and Other Intangibles - Schedule of Estimated Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Amortization Expense
2,017	$ 3,614
2,018	2,299
2,019	1,914
2,020	1,733
2,021	1,611
After 2,021	3,695
Core Deposit and Other Intangibles	$ 14,866	$ 16,635

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Demand deposits	$ 2,866,853	$ 2,576,283
Savings deposits	1,560,752	1,518,722
Certificates and other time deposits of $100,000 or more	276,274	323,698
Other certificates and time deposits	471,247	556,476
Brokered deposits	381,372	314,468
Total Deposits	5,556,498	5,289,647
Cash amount that exceeded federally insured limits	$ 2,200,000	$ 2,100,000

Deposits - Schedule of Contract

Deposits - Schedule of Contractual Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2016USD ($)
Certificates and Other Time Deposits
2,017	$ 621,205
2,018	230,560
2,019	137,090
2,020	65,396
2,021	43,010
After 2,021	31,632
Total	$ 1,128,893

Transfers Accounted for as Se98

Transfers Accounted for as Secured Borrowings (Details) - U.S. Government-sponsored mortgage-backed securities - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 146,480	$ 155,325
Remaining Contractual Maturity of the Agreements
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	129,617	131,537
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	1,337	5,680
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	10,253	8,892
Greater Than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 5,273	$ 9,216

Borrowings - Schedule of Debt (

Borrowings - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Federal funds purchased	$ 120,349	$ 49,721
Securities sold under repurchase agreements	146,480	155,325
Federal Home Loan Bank advances	298,923	235,652
Subordinated debentures and term loans	128,445	127,846
Total Borrowings	$ 694,197	$ 568,544

Borrowings - Narrative (Details

Borrowings - Narrative (Details)	Aug. 10, 2015USD ($)	Apr. 11, 2014USD ($)	Nov. 01, 2013USD ($)investor	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 15, 2012	Jul. 02, 2007USD ($)
Debt Instrument [Line Items]
Total available remaining borrowing capacity from FHLB				$ 291,445,000
Puttable advances with the FHLB				298,923,000	$ 235,652,000
Gain from cancellation of debt					1,250,000
Private debt issuance, number of institutional investors | investor			4
US Bank, NA
Debt Instrument [Line Items]
Line of credit					0
Line of credit maximum borrowing capacity		$ 20,000,000
Commitment fee percentage		0.25%
5.00% Senior Notes Due 2028
Debt Instrument [Line Items]
Debt face amount			$ 5,000,000
Interest rate on notes (as a percent)			5.00%
6.75% Subordinated Notes Due 2028
Debt Instrument [Line Items]
Debt face amount			$ 65,000,000
Interest rate on notes (as a percent)			6.75%
Debt term with fixed interest rate			10 years
One-Month LIBOR | US Bank, NA
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.00%
Putable Advances
Debt Instrument [Line Items]
Puttable advances with the FHLB				$ 25,000,000
Minimum
Debt Instrument [Line Items]
Required value of assets pledged as collateral as a percentage to outstanding advances				142.00%
Interest rate, minimum (as a percent)				0.60%
Maximum
Debt Instrument [Line Items]
Interest rate, minimum (as a percent)				6.81%
Securities Sold Under Repurchase Agreements
Debt Instrument [Line Items]
Maximum amount of outstanding agreements				$ 158,185,000	163,128,000
Total of average agreements				145,379,000	143,491,000
Debt outstanding				146,480,000
Subordinated Debentures and Term Loans
Debt Instrument [Line Items]
Debt outstanding				$ 128,445,000	$ 127,846,000
Subordinated Debenture
Debt Instrument [Line Items]
Debt face amount			$ 70,000,000
Subordinated Debenture | 5.00% Senior Notes Due 2028
Debt Instrument [Line Items]
Redemption price (percent)				100.00%
Subordinated Debenture | 6.75% Subordinated Notes Due 2028
Debt Instrument [Line Items]
Redemption price (percent)				100.00%
Subordinated Debenture | Three-Month LIBOR | 5.00% Senior Notes Due 2028
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				2.345%
Subordinated Debenture | Three-Month LIBOR | 6.75% Subordinated Notes Due 2028
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				4.095%
Subordinated Debenture | First Merchant Capital Trust II
Debt Instrument [Line Items]
Debt outstanding				$ 51,702,000
Debt face amount								$ 56,702,000
Cancellation of debt, amount	$ 5,000,000
Gain from cancellation of debt	$ 1,250,000
Interest rate on notes (as a percent)				2.52%	2.07%		6.495%
Subordinated Debenture | First Merchant Capital Trust II | Three-Month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.56%
Subordinated Debenture | Ameriana Capital Trust I
Debt Instrument [Line Items]
Debt face amount					$ 10,310,000
Interest rate on notes (as a percent)				2.46%	2.01%
Basis spread on variable rate (as a percent)					1.50%

Borrowings - Schedule of Maturi

Borrowings - Schedule of Maturities of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Federal Funds Purchased
Maturities in Years Ending December 31:
2,017	$ 120,349
Total	120,349
Securities Sold Under Repurchase Agreements
Maturities in Years Ending December 31:
2,017	146,480
Total	146,480
Federal Home Loan Bank Advances
Maturities in Years Ending December 31:
2,017	167,068
2,018	26,717
2,019	13,828
2,020	31,310
2,021	25,000
After 2,021	35,000
Total	298,923
Subordinated Debentures and Term Loans
Maturities in Years Ending December 31:
2,017	1,018
After 2,021	132,012
ASC 805 fair value adjustments at acquisition	(4,585)
Total	$ 128,445	$ 127,846

Derivative Instruments and H102

Derivative Instruments and Hedging Activities - Narrative (Details)	12 Months Ended
	Dec. 31, 2016USD ($)interest_rate_swapinterest_rate_cap	Dec. 31, 2015USD ($)interest_rate_swapinterest_rate_cap
Derivative [Line Items]
Termination value of derivatives in a net liability position	$ 3,821,000
Derivative collateral posted	7,516,000
Not Designated as Hedging Instruments
Derivative [Line Items]
Notional amount of interest rate derivatives	292,558,991
Cash Flow Hedging
Derivative [Line Items]
Estimated amount to be transferred from OCI to earnings	$ 1,001,133
Interest Rate Swap
Derivative [Line Items]
Number of interest rate derivatives held | interest_rate_swap	5	5,000
Notional amount of interest rate derivatives	$ 56,000,000	$ 56,000,000
Interest Rate Swap | Cash Flow Hedging | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	26,000,000
Interest Rate Swap | Cash Flow Hedging | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 30,000,000
Interest Rate Cap
Derivative [Line Items]
Number of interest rate derivatives held | interest_rate_cap	1	1,000
Notional amount of interest rate derivatives	$ 13,000,000	$ 13,000,000
Interest Rate Cap | Cash Flow Hedging | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 13,000,000

Derivative Instruments and H103

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - Interest Rate Contracts - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Derivatives Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 15	$ 36
Derivatives Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	2,182	2,921
Derivatives Not Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	6,295	4,938
Derivatives Not Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 6,295	$ 5,149

Derivative Instruments and H104

Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Income Statement (Details) - Interest Rate Contracts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivatives Designated as Hedging Instruments | Interest expense
Derivative [Line Items]
Amount of Loss Reclassified from Other Comprehensive Income Into Income (Effective Portion)	$ (1,250)	$ (1,427)	$ (1,411)
Derivatives Designated as Hedging Instruments | Cash Flow Hedging
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	(368)	(1,681)
Not Designated as Hedging Instruments | Other income
Derivative [Line Items]
Amount of Gain (Loss) Recognized Income on Derivative	$ 211	$ (53)	$ (73)

Fair Values of Financial Ins105

Fair Values of Financial Instruments - Fair Value Measurements of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 696,862	$ 658,400
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	18,765
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	672,928	652,468
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,169	5,932
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	18,765
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	8,477	8,070
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	100	104
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	358,524	300,014
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	312,292	346,266
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		2,176
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,012	3,908
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	6,295	4,938
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	15	36
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,134	5,897
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	31	31
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	4	4
Fair Value, Measurements, Recurring | Fair Value | Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	8,477	8,070
Fair Value, Measurements, Recurring | Fair Value | U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	100	104
Fair Value, Measurements, Recurring | Fair Value | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	363,658	305,911
Fair Value, Measurements, Recurring | Fair Value | U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	312,292	346,266
Fair Value, Measurements, Recurring | Fair Value | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		2,176
Fair Value, Measurements, Recurring | Fair Value | Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	31	31
Fair Value, Measurements, Recurring | Fair Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	20,781	3,912
Fair Value, Measurements, Recurring | Fair Value | Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	6,295	4,938
Fair Value, Measurements, Recurring | Fair Value | Interest rate cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	$ 15	$ 36

Fair Values of Financial Ins106

Fair Values of Financial Instruments - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) - Fair Value, Measurements, Recurring - Available for Sale Securities - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Available for Sale Securities
Beginning Balance	$ 5,932	$ 6,646
Included in other comprehensive income	(223)	199
Principal payments	(540)	(913)
Ending balance	$ 5,169	$ 5,932

Fair Values of Financial Ins107

Fair Values of Financial Instruments - Transfer Between Levels 1, 2 and 3 and Reasons for Transfers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Transfer between in or out of Level 3	$ 0	$ 0

Fair Values of Financial Ins108

Fair Values of Financial Instruments - Valuation Methodologies Used for Instruments Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Significant Unobservable Inputs (Level 3) | Impaired Loans (collateral dependent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 15,318	$ 7,066
Significant Unobservable Inputs (Level 3) | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	1,612	5,529
Fair Value | Impaired Loans (collateral dependent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	15,318	7,066
Fair Value | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 1,612	$ 5,529

Fair Values of Financial Ins109

Fair Values of Financial Instruments - Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other Than Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Discounted cash flow | State and municipal securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 5,134	$ 5,897
Discounted cash flow | State and municipal securities | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Maturity Call Date	1 month	1 month
US Muni BQ curve	A-	A-
Discount rate	0.69%	0.80%
Discounted cash flow | State and municipal securities | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Maturity Call Date	20 years	15 years
US Muni BQ curve	BBB-	BBB-
Discount rate	5.00%	5.00%
Discounted cash flow | Corporate obligations and Equity securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 35	$ 35
Discounted cash flow | Corporate obligations and Equity securities | Three-Month LIBOR
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Premium for illiquidity (percent)	2.00%	2.00%
Collateral based measurements | Impaired loans (collateral dependent)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 15,318	$ 7,066
Collateral based measurements | Impaired loans (collateral dependent) | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability (percent)	0.00%	0.00%
Collateral based measurements | Impaired loans (collateral dependent) | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability (percent)	10.00%	50.00%
Collateral based measurements | Impaired loans (collateral dependent) | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability (percent)	1.00%	2.00%
Appraisals | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 1,612	$ 5,529
Appraisals | Other real estate owned | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions (percent)	0.00%	0.00%
Appraisals | Other real estate owned | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions (percent)	10.00%	20.00%
Appraisals | Other real estate owned | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions (percent)	9.00%	2.00%

Fair Values of Financial Ins110

Fair Values of Financial Instruments - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Investment securities available for sale	$ 696,862	$ 658,400
Investment securities held to maturity	611,933	632,380
Loans held for sale	2,929	9,894
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	127,927	102,170
Interest-bearing time deposits	24,459	32,315
Investment securities available for sale	18,765
Liabilities:
Deposits	4,427,605	4,095,004
Significant Other Observable Inputs (Level 2)
Assets:
Investment securities available for sale	672,928	652,468
Investment securities held to maturity	597,246	598,082
Loans held for sale	2,929	9,894
Federal Reserve and Federal Home Loan Bank stock	17,964	37,633
Interest rate swap asset	6,310	4,974
Interest receivable	26,194	24,415
Liabilities:
Deposits	1,111,491	1,177,142
Borrowings:
Federal funds purchased	120,349	49,721
Securities sold under repurchase agreements	146,449	155,325
Federal Home Loan Bank advances	297,465	236,375
Subordinated debentures and term loans	105,930	103,643
Interest rate swap liability	8,477	8,070
Interest payable	3,110	3,092
Significant Unobservable Inputs (Level 3)
Assets:
Investment securities available for sale	5,169	5,932
Investment securities held to maturity	14,687	34,298
Loans	4,933,552	4,539,940
Carrying Amount
Assets:
Cash and cash equivalents	127,927	102,170
Interest-bearing time deposits	24,459	32,315
Investment securities available for sale	696,862	658,400
Investment securities held to maturity	607,643	618,599
Loans held for sale	2,929	9,894
Loans	5,073,608	4,631,369
Federal Reserve and Federal Home Loan Bank stock	17,964	37,633
Interest rate swap asset	6,310	4,974
Interest receivable	26,194	24,415
Liabilities:
Deposits	5,556,498	5,289,647
Borrowings:
Federal funds purchased	120,349	49,721
Securities sold under repurchase agreements	146,480	155,325
Federal Home Loan Bank advances	298,923	235,652
Subordinated debentures and term loans	128,445	127,846
Interest rate swap liability	8,477	8,070
Interest payable	$ 3,110	$ 3,092

Commitments and Contingent L111

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Loan commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 2,057,878	$ 1,547,048
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 46,010	$ 46,734

Accumulated Other Comprehens112

Accumulated Other Comprehensive Income (Loss) - Summary of Changes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 850,509	$ 726,827	$ 634,923
Other comprehensive income before reclassifications	(9,797)	1,274
Amounts reclassified from accumulated other comprehensive income	(2,422)	(1,006)
Period change	(12,219)	268	4,780
Ending balance	901,657	850,509	726,827
Total
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(1,362)	(1,630)	(6,410)
Period change	(12,219)	268	4,780
Ending balance	(13,581)	(1,362)	(1,630)
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	12,325	14,098
Other comprehensive income before reclassifications	(9,087)	(37)
Amounts reclassified from accumulated other comprehensive income	(2,203)	(1,736)
Period change	(11,290)	(1,773)
Ending balance	1,035	12,325	14,098
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(2,347)	(2,182)
Other comprehensive income before reclassifications	(240)	(1,093)
Amounts reclassified from accumulated other comprehensive income	813	928
Period change	573	(165)
Ending balance	(1,774)	(2,347)	(2,182)
Unrealized Gains (Losses) on Defined Benefit Plans
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(11,340)	(13,546)
Other comprehensive income before reclassifications	(470)	2,404
Amounts reclassified from accumulated other comprehensive income	(1,032)	(198)
Period change	(1,502)	2,206
Ending balance	$ (12,842)	$ (11,340)	$ (13,546)

Accumulated Other Comprehens113

Accumulated Other Comprehensive Income (Loss) - Reclassifications (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Other income - net realized gains on sales of available for sale securities									$ 3,389	$ 2,670	$ 3,581
Income tax expense	$ (7,850)	$ (7,469)	$ (6,716)	$ (5,574)	$ (4,418)	$ (6,557)	$ (8,856)	$ (5,834)	(27,609)	(25,665)	(22,123)
Interest expense - subordinated debentures and term loans									(7,185)	(6,661)	(6,616)
Other expenses - salaries and employee benefits									(102,552)	(101,908)	(96,499)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 22,293	$ 21,059	$ 20,006	$ 17,693	$ 14,177	$ 17,067	$ 17,968	$ 16,172	81,051	65,384	60,162
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									2,422	1,006	1,748
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Unrealized gains (losses) on available for sale securities
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Other income - net realized gains on sales of available for sale securities									3,389	2,670	3,581
Income tax expense									(1,186)	(934)	(1,253)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									2,203	1,736	2,328
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Unrealized gains (losses) on cash flow hedges
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense									437	499	493
Interest expense - subordinated debentures and term loans									(1,250)	(1,427)	(1,411)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									(813)	(928)	(918)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Unrealized gains (losses) on defined benefit plans
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense									(556)	(107)	(182)
Other expenses - salaries and employee benefits									1,588	305	520
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									$ 1,032	$ 198	$ 338

Regulatory Capital and Divid114

Regulatory Capital and Dividends - Schedule of Actual and Required Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Total Risk-Based Capital
Actual	$ 851,521	$ 783,776
Prompt Corrective Action Thresholds, Adequate Capital	479,470	419,809
Tier 1 Capital to Risk-weighted Assets, Amount
Actual	720,484	656,323
Prompt Corrective Action Thresholds, Adequate Capital	359,603	314,857
Common Equity Tier One Capital to Risk-weighted Assets, Amount
Actual	665,445	603,063
Prompt Corrective Action Thresholds, Adequate Capital	269,702	236,143
Tier I Capital to Average Assets, Amount
Actual	720,484	656,323
Prompt Corrective Action Thresholds, Adequate Capital	$ 273,456	$ 242,001
Risk Based Ratios
Total Capital to Risk-weighted Assets, Actual Ratio	14.21%	14.94%
Total Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	8.00%	8.00%
Tier 1 Capital to Risk-Weighted Assets	12.02%	12.51%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	6.00%	6.00%
Common Equity Tier 1 Capital Ratio (Regulatory)	11.10%	11.49%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequately Capitalized Ratio	4.50%	4.50%
Leverage Ratios
Tier 1 Capital to Average Assets	10.54%	10.85%
Tier I Capital to Average Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	4.00%	4.00%
First Merchants Bank
Total Risk-Based Capital
Actual	$ 800,598	$ 739,793
Prompt Corrective Action Thresholds, Adequate Capital	481,490	423,242
Prompt Corrective Action Thresholds, Well Capitalized	601,862	529,052
Tier 1 Capital to Risk-weighted Assets, Amount
Actual	734,561	677,340
Prompt Corrective Action Thresholds, Adequate Capital	361,117	317,431
Prompt Corrective Action Thresholds, Well Capitalized	481,490	423,242
Common Equity Tier One Capital to Risk-weighted Assets, Amount
Actual	734,561	677,340
Prompt Corrective Action Thresholds, Adequate Capital	270,838	238,074
Prompt Corrective Action Thresholds, Well Capitalized	391,210	343,884
Tier I Capital to Average Assets, Amount
Actual	734,561	677,340
Prompt Corrective Action Thresholds, Adequate Capital	272,461	241,423
Prompt Corrective Action Thresholds, Well Capitalized	$ 340,576	$ 301,779
Risk Based Ratios
Total Capital to Risk-weighted Assets, Actual Ratio	13.30%	13.98%
Total Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	8.00%	8.00%
Total Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	10.00%	10.00%
Tier 1 Capital to Risk-Weighted Assets	12.20%	12.80%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	6.00%	6.00%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	8.00%	8.00%
Common Equity Tier 1 Capital Ratio (Regulatory)	12.20%	12.80%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequately Capitalized Ratio	4.50%	4.50%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	6.50%	6.50%
Leverage Ratios
Tier 1 Capital to Average Assets	10.78%	11.22%
Tier I Capital to Average Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	4.00%	4.00%
Tier I Capital to Average Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	5.00%	5.00%

Regulatory Capital and Divid115

Regulatory Capital and Dividends - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 09, 2016
Banking and Thrift [Abstract]
Dividends available	$ 97,225,000
Dividend reinvestment and stock purchase plan, stockholder's maximum amount of cash payments per quarter in purchase of common stock	$ 2,500
Stock repurchase program		$ 15,000,000

Loan Servicing (Details)

Loan Servicing (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Unpaid balance of loans serviced for others	$ 369,592	$ 312,204	$ 254,223

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of average closing price to be paid by employees		85.00%
Share-based compensation		$ 2,600,000	$ 2,270,000	$ 2,177,000
Options granted (in shares)		0	0
Weighted-average grant date fair value for stock options (in dollars per share)				$ 8.13
Estimated pre-vesting forfeiture rate (as a percent)		3.80%
Aggregate intrinsic value of stock options exercised		$ 1,641,000	$ 921,000
Stock options exercised		2,495,000	$ 1,461,000	$ 504,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock purchases through advance payroll deductions in a calendar year		$ 25,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term		10 years
Stock options vesting percentage		100.00%
Unrecognized compensation expense	$ 0	$ 0
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested period		6 months
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested period		2 years
RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested period		3 years
Unrecognized compensation expense	3,527,000	$ 3,527,000
Unrecognized compensation expense expected recognition period		1 year 4 months 20 days
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	0	$ 0
Grant date fair value of ESPP options	$ 23,000

Share-Based Compensation - Comp

Share-Based Compensation - Components of Awards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 2,600	$ 2,270	$ 2,177
Income tax expense (benefit)	(865)	(745)	(726)
Total share-based compensation expense, net of income taxes	1,735	1,525	1,451
Stock and ESPP Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	76	101	237
Income tax expense (benefit)	18	4	(47)
Total share-based compensation expense, net of income taxes	94	105	190
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	2,524	2,169	1,940
Income tax expense (benefit)	(883)	(749)	(679)
Total share-based compensation expense, net of income taxes	$ 1,641	$ 1,420	$ 1,261

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Beginning balance (in shares)	442,012
Exercised (in shares)	(128,848)
Canceled (in shares)	(52,953)
Ending balance (in shares)	260,211	442,012
Vested and Expected to Vest, Number of Shares	260,211
Exercisable, Number of Shares	260,211
Weighted-Average Exercise Price
Beginning balance (in dollars per share)	$ 19.99	$ 20.99
Exercised (in dollars per share)	19.37
Canceled (in dollars per share)	25.09
Ending balance (in dollars per share)	19.26	$ 19.99
Vested and Expected to Vest, Weighted-Average Exercise Price (in dollars per share)	19.26
Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 19.26
Weighted Average Remaining Contractual Term
Outstanding	2 years 8 months 16 days
Vested and Expected to Vest	2 years 8 months 16 days
Exercisable	2 years 8 months 16 days
Aggregate Intrinsic Value
Outstanding	$ 4,785,982
Vested and Expected to Vest	4,785,982
Exercisable	$ 4,785,982

Share-Based Compensation - Unve

Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	354,504
Granted (in shares) | shares	124,563
Forfeited (in shares) | shares	(9,594)
Vested (in shares) | shares	(141,126)
Unvested RSAs, Ending Balance (in shares) | shares	328,347
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 19.65
Granted (in dollars per share) | $ / shares	24.01
Forfeited (in dollars per share) | $ / shares	21.99
Vested (in dollars per share) | $ / shares	16.62
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 22.87

Pension and Other Post Retir121

Pension and Other Post Retirement Benefit Plans - Narrative (Details) - USD ($)	Nov. 20, 2015	Mar. 01, 2005	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Percentage of employees covered by plan			19.00%
Minimum participant attained age		55 years
Requisite service period (at least)		10 years
Percentage of the premiums paid by plan participants			100.00%
Discount rate (as a percent)			4.20%	4.50%	4.00%
Accumulated benefit obligation			$ 84,090,000	$ 71,747,000
Minimum required contribution in next fiscal year			$ 0
Amount of discretionary contributions made by employer to defined contribution plan, percent			50.00%
Maximum annual contribution percentage per employee			6.00%
Requisite service period			1000 hours
Employer percentage contribution			2.00%
Vesting period			5 years
Expense recognized in the period			$ 3,441,000	3,526,000	$ 3,396,000
Curtailment gain			2,157,000
Obligations payable			54,000	1,403,000
Post retirement plan expense			(2,437,000)	(127,000)	97,000
Fair value of plan assets			83,557,000	71,396,000	$ 77,139,000
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			64,064,000	52,433,000
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			$ 19,493,000	$ 18,963,000
Ameriana | Pentegra Plan
Defined Benefit Plan Disclosure [Line Items]
Written notice of withdrawal, period	60 days
Minimum
Defined Benefit Plan Disclosure [Line Items]
Age of plan participants			55 years
Minimum | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Maturities of debt securities			15 days	15 days
Maximum
Defined Benefit Plan Disclosure [Line Items]
Age of plan participants			65 years
Maximum | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Maturities of debt securities			8 years 11 days	9 years 15 days
Weighted Average | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Maturities of debt securities			3 years 11 months 20 days	4 years 5 months 20 days

Pension and Other Post Retir122

Pension and Other Post Retirement Benefit Plans - Schedule of Changes in Benefit Obligation, and Plan Assets, Funded Status of the Plan, Assets and Liabilities Recognized in the Balance Sheets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 71,747	$ 80,650
Service cost	9	55	$ 73
Interest cost	3,273	3,087	3,235
Actuarial loss (gain)	2,679	(5,617)
Benefits paid	(5,263)	(6,428)
Net transfers in from Ameriana acquisition	11,645
Benefit obligation at end of year	84,090	71,747	80,650
Change in Plan Assets:
Fair value of plan assets at beginning of year	71,396	77,139
Actual return on plan assets	6,959	153
Employer contributions	739	532
Benefits paid	(5,263)	(6,428)
Ameriana acquisition	9,726
End of year	83,557	71,396	$ 77,139
Funded status at end of year	(533)	(351)
Assets and Liabilities Recognized in the Balance Sheets:
Deferred tax asset	7,041	7,461
Assets	5,028	4,006
Liabilities	5,561	4,357
Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost, net of tax, consist of:
Accumulated loss	(12,624)	(13,857)
Prior service credit	(451)	(305)
Total	$ (13,075)	$ (14,162)

Pension and Other Post Retir123

Pension and Other Post Retirement Benefit Plans - Schedule of Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Projected benefit obligation	$ 5,561	$ 4,357
Accumulated benefit obligation	5,561	4,357
Fair value of plan assets

Pension and Other Post Retir124

Pension and Other Post Retirement Benefit Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 9	$ 55	$ 73
Interest cost	3,273	3,087	3,235
Expected return on plan assets	(4,508)	(4,471)	(4,467)
Amortization of prior service costs	79	64	81
Amortization of net loss	1,656	1,722	478
Net periodic pension (benefit) cost	$ 509	$ 457	$ (600)

Pension and Other Post Retir125

Pension and Other Post Retirement Benefit Plans - Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit) cost	$ 509	$ 457	$ (600)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit) cost	509	457	(600)
Net gain (loss)	(228)	1,299	(12,203)
Amortization of loss	1,656	1,722	478
Amortization of prior service cost	79	64	81
Total recognized in other comprehensive income (loss)	1,507	3,085	(11,644)
Total recognized in net periodic pension cost and other comprehensive income (loss)	$ 998	$ 2,628	$ (11,044)

Pension and Other Post Retir126

Pension and Other Post Retirement Benefit Plans - Amount To Be Amortized From Accumulated Other Comprehensive Income, Next Fiscal Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Amortization of net loss	$ (1,208)	$ (1,505)	$ (1,770)
Amortization of prior service cost	(90)	(61)	(64)
Total	$ (1,298)	$ (1,566)	$ (1,834)

Pension and Other Post Retir127

Pension and Other Post Retirement Benefit Plans - Schedule of Weighted Average Assumptions Used to Determine Benefit Obligation and Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Weighted-average Assumptions Used to Determine Benefit Obligation:
Discount rate	4.20%	4.50%	4.00%
Rate of compensation increase for accruing active participants	3.00%	3.00%	3.00%
Weighted-average Assumptions Used to Determine Cost:
Discount rate	4.50%	4.00%	4.80%
Expected return on plan assets	6.00%	6.00%	6.00%
Rate of compensation increase for accruing active participants	3.00%	3.00%	3.00%

Pension and Other Post Retir128

Pension and Other Post Retirement Benefit Plans - Schedule of Expected Future Benefit Payments (Details) $ in Thousands	Dec. 31, 2016USD ($)
Compensation and Retirement Disclosure [Abstract]
2,017	$ 5,756
2,018	5,644
2,019	5,802
2,020	5,688
2,021	5,557
After 2,021	27,118
Total	$ 55,565

Pension and Other Post Retir129

Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Category (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	100.00%	100.00%
Target (as a percent)	100.00%	100.00%
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	4.50%	2.20%
Target (as a percent)	3.00%	2.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	55.80%	58.10%
Target (as a percent)	55.00%	60.00%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	37.70%	37.40%
Target (as a percent)	40.00%	36.00%
Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	2.00%	2.30%
Target (as a percent)	2.00%	2.00%

Pension and Other Post Retir130

Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Level (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 83,557	$ 71,396	$ 77,139
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	64,064	52,433
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,778	1,608
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10,646	9,113
Quoted Prices in Active Markets for Identical Assets (Level 1) | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	2,278	1,538
Quoted Prices in Active Markets for Identical Assets (Level 1) | Taxable Bond
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,974	4,536
Quoted Prices in Active Markets for Identical Assets (Level 1) | Large Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19,611	18,528
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mid Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10,304	8,537
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,680	3,578
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,093	3,353
Quoted Prices in Active Markets for Identical Assets (Level 1) | Specialty Alternative Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,700	1,642
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19,493	18,963
Significant Other Observable Inputs (Level 2) | Government Agency and Municipal Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,855	6,993
Significant Other Observable Inputs (Level 2) | Certificates of Deposit
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,268	1,511
Significant Other Observable Inputs (Level 2) | Common Bond Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,744	4,647
Significant Other Observable Inputs (Level 2) | Common Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,626	5,812
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets
Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	83,557	71,396
Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,778	1,608
Fair Value | Corporate Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10,646	9,113
Fair Value | Government Agency and Municipal Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,855	6,993
Fair Value | Certificates of Deposit
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,268	1,511
Fair Value | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	2,278	1,538
Fair Value | Common Bond Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,744	4,647
Fair Value | Common Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,626	5,812
Fair Value | Taxable Bond
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,974	4,536
Fair Value | Large Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19,611	18,528
Fair Value | Mid Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10,304	8,537
Fair Value | Small Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,680	3,578
Fair Value | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,093	3,353
Fair Value | Specialty Alternative Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 1,700	$ 1,642

Income Tax - Reconciliation of

Income Tax - Reconciliation of Federal Statutory to Actual Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal Statutory Income Tax at 35%									$ 38,031	$ 31,867	$ 28,800
Tax-exempt Interest Income									(8,749)	(7,083)	(5,148)
Basis Difference on Sale of Insurance Subsidiary										2,252
Stock Compensation									27	34	36
Earnings on Life Insurance									(1,486)	(1,012)	(1,271)
Tax Credits									(564)	(583)	(911)
Other									350	190	617
Income Tax Expense	$ 7,850	$ 7,469	$ 6,716	$ 5,574	$ 4,418	$ 6,557	$ 8,856	$ 5,834	$ 27,609	$ 25,665	$ 22,123
Federal statutory income tax rate									35.00%	35.00%	35.00%

Income Tax - Components of Inco

Income Tax - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Currently Payable:
Federal									$ 18,998	$ 21,221	$ 7,075
Deferred:
Federal									8,233	3,952	14,538
State									378	492	510
Income Tax Expense	$ 7,850	$ 7,469	$ 6,716	$ 5,574	$ 4,418	$ 6,557	$ 8,856	$ 5,834	$ 27,609	$ 25,665	$ 22,123

Income Tax - Deferred Tax Asset

Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Assets:
Differences in Accounting for Loan Losses	$ 26,315	$ 25,867
Differences in Accounting for Loan Fees	1,918	762
Differences in Accounting for Loans and Securities	5,689	9,359
Deferred Compensation	3,471	5,100
Difference in Accounting for Pensions and Other Employee Benefits	83	2,247
Federal & State Income Tax Loss Carryforward and Credits	16,643	23,737
Other	4,210	9,310
Total Assets	58,329	76,382
Liabilities:
Differences in Depreciation Methods	8,216	7,742
State Income Tax	237	591
Net Unrealized Gain on Securities Available for Sale	557	6,636
Gain on FDIC Modified Whole Bank Transaction	1,126	1,405
Other	623	717
Total Liabilities	10,759	17,091
Net Deferred Tax Asset Before Valuation Allowance	47,570	59,291
Valuation allowance:
Beginning Balance	(15,736)	(17,568)
Decrease/(Increase) During the Year	5,921	1,832
Ending Balance	(9,815)	(15,736)
Net Deferred Tax Asset	$ 37,755	$ 43,555

Income Tax - Narrative (Details

Income Tax - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Decrease in deferred tax assets	$ 5,800
Valuation allowance	9,815	$ 15,736	$ 17,568
Additional paid-in capital	509,018	$ 504,530
Unrecorded deferred tax liability	8,847
Ameriana
Valuation Allowance [Line Items]
Additional paid-in capital	11,883
CFS
Valuation Allowance [Line Items]
Additional paid-in capital	13,393
State and Local Jurisdiction
Valuation Allowance [Line Items]
State tax loss carryforward	91,143
State deferred tax assets	10,491
Valuation allowance	9,815
Available for Sale Securities
Valuation Allowance [Line Items]
Decrease in deferred tax liability	6,079
Loans
Valuation Allowance [Line Items]
Decrease in deferred tax assets	3,670
Other Real Estate Owned
Valuation Allowance [Line Items]
Decrease in deferred tax assets	2,592
Operating Loss Carryforwards | Federal
Valuation Allowance [Line Items]
Decrease in deferred tax assets	2,308
Pension And Other Employee Benefits
Valuation Allowance [Line Items]
Decrease in deferred tax assets	$ 2,164

Net Income Per Share - Reconcil

Net Income Per Share - Reconciliation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders									$ 81,051	$ 65,384	$ 60,162
Net income available to common stockholders									$ 81,051	$ 65,384	$ 60,162
Weighted-Average Shares
Net income available to common stockholders (in shares)	40,846,650	40,779,423	40,751,720	40,690,573	37,908,873	37,850,827	37,793,448	37,709,883	40,767,343	37,816,399	36,266,356
Effect of dilutive stock options and warrants (in shares)									245,790	271,834	288,253
Net income available to common stockholders (in shares)	41,124,179	41,025,784	40,969,111	40,916,972	38,190,694	38,118,199	38,043,359	38,000,074	41,013,133	38,088,233	36,554,609
Basic net income per share:
Net income available to common stockholders (in dollars per share)	$ 0.55	$ 0.51	$ 0.50	$ 0.43	$ 0.37	$ 0.46	$ 0.47	$ 0.43	$ 1.99	$ 1.73	$ 1.66
Diluted net income per share:
Net income available to common stockholders (in dollars per share)	$ 0.55	$ 0.51	$ 0.49	$ 0.43	$ 0.37	$ 0.45	$ 0.47	$ 0.43	$ 1.98	$ 1.72	$ 1.65

Net Income Per Share - Narrativ

Net Income Per Share - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Stock options not included in the earnings per share calculation (in shares)	51,949	286,119	543,514
Weighted average exercise price (in dollars per share)	$ 19.26	$ 19.99	$ 20.99

Quarterly Results of Operati137

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 65,005	$ 64,376	$ 62,704	$ 61,227	$ 56,514	$ 56,538	$ 55,202	$ 52,944	$ 253,312	$ 221,198	$ 208,879
Interest expense	6,631	6,694	6,742	6,772	6,440	6,215	6,171	5,968	26,839	24,794	21,842
NET INTEREST INCOME	58,374	57,682	55,962	54,455	50,074	50,323	49,031	46,976	226,473	196,404	187,037
Provision for loan losses	2,417	1,900	790	550			417		5,657	417	2,560
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	55,957	55,782	55,172	53,905	50,074	50,323	48,614	46,976	220,816	195,987	184,477
Non-interest income	16,120	16,861	16,385	15,837	14,031	16,332	24,106	15,399	65,203	69,868	61,816
Non-interest expense	41,934	44,115	44,835	46,475	45,510	43,031	45,896	40,369	177,359	174,806	164,008
INCOME BEFORE INCOME TAX	30,143	28,528	26,722	23,267	18,595	23,624	26,824	22,006
Income tax expense	7,850	7,469	6,716	5,574	4,418	6,557	8,856	5,834	27,609	25,665	22,123
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 22,293	$ 21,059	$ 20,006	$ 17,693	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 81,051	$ 65,384	$ 60,162
Basic EPS (in dollars per share)	$ 0.55	$ 0.51	$ 0.50	$ 0.43	$ 0.37	$ 0.46	$ 0.47	$ 0.43	$ 1.99	$ 1.73	$ 1.66
Diluted EPS (in dollars per share)	$ 0.55	$ 0.51	$ 0.49	$ 0.43	$ 0.37	$ 0.45	$ 0.47	$ 0.43	$ 1.98	$ 1.72	$ 1.65
Average Shares Outstanding:
Basic (in shares)	40,846,650	40,779,423	40,751,720	40,690,573	37,908,873	37,850,827	37,793,448	37,709,883	40,767,343	37,816,399	36,266,356
Diluted (in shares)	41,124,179	41,025,784	40,969,111	40,916,972	38,190,694	38,118,199	38,043,359	38,000,074	41,013,133	38,088,233	36,554,609

Condensed Financial Informat138

Condensed Financial Information (parent company only) - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Investment securities	$ 696,862	$ 658,400
Premises and equipment	94,432	97,648
Interest receivable	26,194	24,415
Goodwill	244,000	243,129	$ 202,724
Cash surrender value of life insurance	201,671	200,539
Tax asset, deferred and receivable	39,384	46,977
Other assets	30,706	24,023
TOTAL ASSETS	7,211,611	6,761,003
Liabilities
Subordinated debentures and term loans	128,445	127,846
Interest payable	3,110	3,092
Other liabilities	56,149	49,211
Total Liabilities	6,309,954	5,910,494
Stockholders' equity	901,657	850,509	$ 726,827	$ 634,923
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	7,211,611	6,761,003
Parent
Assets
Cash	31,944	43,622
Investment in subsidiaries	978,291	932,372
Investment securities	18,765
Premises and equipment	1,260	1,361
Interest receivable	47	47
Goodwill	448	448
Cash surrender value of life insurance	1,082	1,041
Tax asset, deferred and receivable	521	2,024
Other assets	5,274	5,195
TOTAL ASSETS	1,037,632	986,110
Liabilities
Subordinated debentures and term loans	127,427	127,663
Interest payable	880	873
Other liabilities	7,668	7,065
Total Liabilities	135,975	135,601
Stockholders' equity	901,657	850,509
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,037,632	$ 986,110

Condensed Financial Informat139

Condensed Financial Information (parent company only) - Statement of Income and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income
Gain on the sale of insurance subsidiary										$ 8,265
Gain on cancellation of subordinated debentures										1,250
Other income									3,594	1,778	1,854
Expenses
Interest expense	$ 6,631	$ 6,694	$ 6,742	$ 6,772	$ 6,440	$ 6,215	$ 6,171	$ 5,968	26,839	24,794	21,842
Salaries and employee benefits									102,552	101,908	96,499
Other expenses									15,470	15,187	14,236
INCOME BEFORE INCOME TAX	30,143	28,528	26,722	23,267	18,595	23,624	26,824	22,006
Income tax benefit (expense)	(7,850)	(7,469)	(6,716)	(5,574)	(4,418)	(6,557)	(8,856)	(5,834)	(27,609)	(25,665)	(22,123)
Net income available to common stockholders									81,051	65,384	60,162
Net income	$ 22,293	$ 21,059	$ 20,006	$ 17,693	$ 14,177	$ 17,067	$ 17,968	$ 16,172	81,051	65,384	60,162
Other comprehensive income (loss)									(12,219)	268	4,780
Comprehensive income									68,832	65,652	64,942
Parent
Income
Dividends from subsidiaries									33,546	39,032	53,231
Gain on the sale of insurance subsidiary										8,265
Gain on cancellation of subordinated debentures										1,250
Other income									143	197	538
Total income									33,689	48,744	53,769
Expenses
Interest expense									7,185	6,661	6,616
Salaries and employee benefits									639	3,023	3,128
Net occupancy and equipment expenses									832	464	442
Other outside services									967	1,455	458
Professional services									279	636	409
Other expenses									(470)	1,234	1,132
Total expenses									9,432	13,473	12,185
INCOME BEFORE INCOME TAX									24,257	35,271	41,584
Income tax benefit (expense)									3,243	(974)	3,999
Income before equity in undistributed income of subsidiaries									27,500	34,297	45,583
Equity in undistributed (distributions in excess of) income of subsidiaries									53,551	31,087	14,579
Net income available to common stockholders									81,051	65,384	60,162
Net income									81,051	65,384	60,162
Other comprehensive income (loss)									(12,219)	268	4,780
Comprehensive income									$ 68,832	$ 65,652	$ 64,942

Condensed Financial Informat140

Condensed Financial Information (parent company only) - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flow From Operating Activities:
Net income	$ 22,293	$ 21,059	$ 20,006	$ 17,693	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 81,051	$ 65,384	$ 60,162
Adjustments to Reconcile Net Income to Net Cash:
Share-based compensation									2,600	2,270	2,177
Gain on sale of insurance subsidiary										(8,265)
Gain on cancellation of subordinated debentures										(1,250)
Net Change in:
Net cash provided by operating activities									106,860	56,660	75,840
Cash Flows from Investing Activities:
Purchase of securities available for sale									(281,470)	(200,154)	(110,936)
Net cash paid in acquisition										(7,936)	(10,084)
Other									(4,490)	9	5,889
Net cash used in investing activities									(451,845)	(340,391)	(125,991)
Cash Flows from Financing Activities:
Repayment of borrowings									(982,449)	(370,813)	(789,563)
Stock issued under employee benefit plans									462	460	478
Stock issued under dividend reinvestment and stock purchase plan									835	661	523
Stock options exercised									2,495	1,461	504
Stock redeemed									(1,980)	(1,640)	(1,067)
Net cash provided by financing activities									370,742	267,285	59,333
Cash and Cash Equivalents, beginning of the year				102,170				118,616	102,170	118,616	109,434
Cash and Cash Equivalents, end of year	127,927				102,170				127,927	102,170	118,616
Parent
Cash Flow From Operating Activities:
Net income									81,051	65,384	60,162
Adjustments to Reconcile Net Income to Net Cash:
Share-based compensation									1,166	843	887
Distributions in excess of (equity in undistributed) income of subsidiaries									(53,551)	(31,087)	(14,579)
Gain on sale of insurance subsidiary										(8,265)
Gain on cancellation of subordinated debentures										(1,250)
Net Change in:
Other assets									833	(441)	2,425
Other liabilities									849	(1,486)	1,466
Investment in subsidiaries - operating activities									(1,938)	197	(4,517)
Net cash provided by operating activities									28,410	23,895	45,844
Cash Flows from Investing Activities:
Purchase of securities available for sale									(19,804)
Net cash paid in acquisition										(14,500)	(12,832)
Proceeds from business divestitures										16,000
Other										575
Net cash used in investing activities									(19,804)	2,075	(12,832)
Cash Flows from Financing Activities:
Cash dividends									(22,203)	(15,654)	(10,694)
Repayment of borrowings										(3,750)
Proceeds from issuance of long-term debt
Preferred stock redemption under small business lending fund
Stock issued under employee benefit plans									462	460	478
Stock issued under dividend reinvestment and stock purchase plan									835	661	523
Stock options exercised									2,602	1,531	564
Stock redeemed									(1,980)	(1,640)	(1,067)
Net cash provided by financing activities									(20,284)	(18,392)	(10,196)
Cash and Cash Equivalents, beginning of the year				$ 43,622				$ 36,044	43,622	36,044	13,228
Cash and Cash Equivalents, end of year	$ 31,944				$ 43,622				$ 31,944	$ 43,622	$ 36,044

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 21, 2016	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 16, 2017	Jan. 24, 2017
Subsequent Event [Line Items]
Assets				$ 7,211,611	$ 6,761,003
Purchase of securities available for sale				281,470	$ 200,154	$ 110,936
Arlington Bank
Subsequent Event [Line Items]
Assets				309,000
IALB
Subsequent Event [Line Items]
Assets				$ 1,100,000
IALB
Subsequent Event [Line Items]
Shares purchased (shares)	495,112
Percentage of interest acquired	12.10%
Purchase of securities available for sale	$ 19,800
Arlington Bank | Subsequent event
Subsequent Event [Line Items]
Share price (in dollars per share)								$ 36.46
Arlington Bank | Subsequent event | Forecast
Subsequent Event [Line Items]
Estimated transaction value		$ 75,800
IALB | Subsequent event
Subsequent Event [Line Items]
Share price (in dollars per share)							$ 42.10
IALB | Subsequent event | Forecast
Subsequent Event [Line Items]
Estimated transaction value			$ 251,300