First Merchants (FRME) 10-K 29 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Feb. 23, 2016	Jun. 30, 2015
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	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		40,671,228
Entity Public Float			$ 934,269

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 102,170	$ 118,616
Interest-bearing time deposits	32,315	47,520
Investment securities available for sale	658,400	549,543
Investment securities held to maturity (fair value of $632,380 and $647,723)	618,599	631,088
Loans held for sale	9,894	7,235
Loans	4,693,822	3,924,865
Less: Allowance for loan losses	(62,453)	(63,964)
Net Loans	4,631,369	3,860,901
Premises and equipment	97,648	77,691
Federal Reserve and Federal Home Loan Bank stock	37,633	41,353
Interest receivable	24,415	19,984
Core deposit intangibles	16,635	16,031
Goodwill	243,129	202,724
Cash surrender value of life insurance	200,539	169,424
Other real estate owned	17,257	19,293
Tax asset, deferred and receivable	46,977	41,960
Other assets	24,023	20,764
TOTAL ASSETS	6,761,003	5,824,127
Deposits:
Noninterest-bearing	1,266,027	1,070,859
Interest-bearing	4,023,620	3,569,835
Total Deposits	5,289,647	4,640,694
Borrowings:
Federal funds purchased	49,721	15,381
Securities sold under repurchase agreements	155,325	124,539
Federal Home Loan Bank advances	235,652	145,264
Subordinated debentures and term loans	127,846	126,810
Total Borrowings	568,544	411,994
Interest payable	3,092	3,201
Other liabilities	49,211	41,411
Total Liabilities	$ 5,910,494	$ 5,097,300
COMMITMENTS AND CONTINGENT LIABILITIES
STOCKHOLDERS' EQUITY
Cumulative Preferred Stock, $1,000 par value, $1,000 liquidation value, Authorized 600 shares, Issued and outstanding - 125 shares	$ 125	$ 125
Common Stock - $.125 stated value, Authorized 50,000,000 shares, Issued and outstanding 40,664,259 and 37,669,948 shares	5,083	4,709
Additional paid-in capital	504,530	431,220
Retained earnings	342,133	292,403
Accumulated other comprehensive loss	(1,362)	(1,630)
Total Stockholders' Equity	850,509	726,827
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 6,761,003	$ 5,824,127

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Investment securities held to maturity	$ 632,380	$ 647,723
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	40,664,259	37,669,948
Common Stock, shares outstanding	40,664,259	37,669,948
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, 2015	Dec. 31, 2014	Dec. 31, 2013
Loans receivable:
Taxable	$ 180,805	$ 172,039	$ 142,752
Tax-exempt	3,459	327	393
Investment securities:
Taxable	17,885	19,882	15,214
Tax-exempt	16,922	14,383	10,829
Deposits with financial institutions	160	124	158
Federal Reserve and Federal Home Loan Bank stock	1,967	2,124	1,488
Total Interest Income	221,198	208,879	170,834
INTEREST EXPENSE
Deposits	14,855	11,678	10,053
Federal funds purchased	74	177	102
Securities sold under repurchase agreements	368	529	787
Federal Home Loan Bank advances	2,836	2,842	2,096
Subordinated debentures, revolving credit lines and term loans	6,661	6,616	3,531
Total Interest Expense	24,794	21,842	16,569
NET INTEREST INCOME	196,404	187,037	154,265
Provision for loan losses	417	2,560	6,648
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	195,987	184,477	147,617
OTHER INCOME
Service charges on deposit accounts	16,201	15,747	12,400
Fiduciary activities	9,196	8,966	8,594
Other customer fees	16,959	15,699	11,866
Commission income	4,147	7,411	7,141
Earnings on cash surrender value of life insurance	2,919	3,659	2,613
Net gains and fees on sales of loans	6,483	4,899	7,511
Net realized gains on sales of available for sale securities	2,670	$ 3,581	$ 487
Gain on sale of insurance subsidiary	8,265
Gain on cancellation of subordinated debentures	1,250
Other income	4,441	$ 6,438	$ 5,404
Total Other Income	72,531	66,400	56,016
OTHER EXPENSES
Salaries and employee benefits	101,908	96,499	85,413
Net occupancy	14,668	13,831	10,291
Equipment	10,787	9,337	7,737
Marketing	3,493	3,464	2,236
Outside data processing fees	7,109	7,315	5,591
Printing and office supplies	1,353	1,565	1,340
Core deposit amortization	2,835	2,445	1,649
FDIC assessments	3,655	3,738	2,862
Other real estate owned and foreclosure expenses	6,137	8,043	6,661
Professional and other outside services	9,855	8,116	8,297
Other expenses	15,669	14,239	11,142
Total Other Expenses	177,469	168,592	143,219
INCOME BEFORE INCOME TAX	91,049	82,285	60,414
Income tax expense	25,665	22,123	15,884
NET INCOME	$ 65,384	$ 60,162	44,530
Preferred stock dividends			(2,380)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 65,384	$ 60,162	$ 42,150
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS PER SHARE:
Basic (in dollars per share)	$ 1.73	$ 1.66	$ 1.42
Diluted (in dollars per share)	$ 1.72	$ 1.65	$ 1.41

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 65,384	$ 60,162	$ 44,530
Other comprehensive income (loss) net of tax:
Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $20, $8,001, and $6,841	$ (37)	$ 14,860	(12,705)
Unrealized loss on securities transferred to held-to-maturity, net of tax of $0, $0, and $1,786			(3,316)
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, $995, and $767		$ 1,847	1,425
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $588, $1,397, and $831	$ (1,093)	(2,599)	1,543
Reclassification adjustment for net losses (gains) included in net income net of tax of $435, $760, and $157	(808)	(1,410)	291
Defined benefit pension plans, net of tax of $1,187, $4,264, and $6,382
Net gain (loss) arising during period	2,404	(7,580)	10,704
Amortization of prior service cost	(198)	(338)	1,147
Period change	268	4,780	(911)
Comprehensive income	$ 65,652	$ 64,942	$ 43,619

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Unrealized holding gain (loss) on securities available for sale arising during the period, tax	$ (20)	$ 8,001	$ (6,841)
Unrealized loss on securities transferred to held-to-maturity, tax	0	0	(1,786)
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	(995)	(767)
Unrealized gain (loss) on cash flow hedges arising during the period, tax	(588)	(1,397)	831
Reclassification adjustment for net losses (gains) included in net income, tax	435	760	(157)
Defined benefit pension plans, tax	$ (1,187)	$ 4,264	$ (6,382)

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, 2012		90,908	28,692,616
Beginning balance at Dec. 31, 2012	$ 552,236	$ 90,908	$ 3,587	$ 256,843	$ 206,397	$ (5,499)
Comprehensive income
Net income	44,530				44,530
Other comprehensive income (loss), net of tax	(911)					(911)
Cash dividends on common stock	(5,612)				(5,612)
Cash dividends on preferred stock under small business lending fund	(2,380)				(2,380)
Preferred stock redemption under small business lending fund (in shares)		(90,783)
Preferred stock redemption under small business lending fund	(90,783)	$ (90,783)
Issuance of common stock related to acquisition (in shares)			7,079,457
Issuance of common stock related to acquisition	135,642		$ 885	134,757
Share-based compensation (in shares)			116,978
Share-based compensation	1,773		$ 15	1,758
Stock Issued under employee benefit plans (in shares)			33,451
Stock issued under employee benefit plans	479		$ 4	475
Stock issued under dividend reinvestment and stock purchase plan (in shares)			18,449
Stock issued under dividend reinvestment and stock purchase plan	325		$ 2	323
Stock options exercised (in shares)			13,750
Stock options exercised	115		$ 2	113
Stock redeemed (in shares)			(32,940)
Stock redeemed	(491)		$ (5)	(486)
Ending balance (in shares) at Dec. 31, 2013		125	35,921,761
Ending 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		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)

CONSOLIDATED STATEMENT OF STOC8

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in dollars per share)	$ 0.41	$ 0.29	$ 0.18

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow From Operating Activities:
Net income	$ 65,384	$ 60,162	$ 44,530
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	417	2,560	6,648
Depreciation and amortization	6,262	6,007	4,670
Change in deferred taxes	4,444	15,048	2,147
Share-based compensation	2,270	2,177	$ 1,773
Tax benefit from stock options exercised	(70)	(60)
Loans originated for sale	(364,411)	(222,892)	$ (280,693)
Proceeds from sales of Loans	361,752	$ 220,988	$ 297,851
Gain on sale of insurance subsidiary	(8,265)
Gain on cancellation of subordinated debentures	(1,250)
Gains on sales of securities available for sale	(2,670)	$ (3,581)	$ (487)
Change in interest receivable	(2,833)	(545)	(535)
Change in interest payable	$ (162)	$ 1,332	(364)
Change in other receivable			110,032
Other adjustments	$ (4,208)	$ (5,356)	(2,441)
Net cash provided by operating activities	56,660	75,840	183,131
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	24,917	24,075	196,753
Purchases of:
Securities available for sale	(200,154)	(110,936)	(398,491)
Securities held to maturity	(87,282)	(142,988)	(11,145)
Proceeds from sales of securities available for sale	83,647	126,575	25,222
Proceeds from maturities of:
Securities available for sale	63,124	68,339	93,273
Securities held to maturity	98,581	69,420	78,534
Change in Federal Reserve and Federal Home Loan Bank stock	7,268	(413)	(17)
Net change in loans	(350,287)	(170,109)	(142,861)
Net cash and cash equivalents received (paid) in acquisition	(7,936)	$ (10,084)	$ 10,992
Net cash received from sale of insurance subsidiary	15,155
Proceeds from the sale of other real estate owned	12,567	$ 14,241	$ 12,346
Other investing activities	9	5,889	(2,768)
Net cash used in investing activities	(340,391)	(125,991)	(138,162)
Net change in :
Demand and savings deposits	240,736	53,062	141,052
Certificates of deposit and other time deposits	(79,656)	127,740	(211,399)
Borrowings	491,660	678,290	295,537
Repayment of borrowings	(370,813)	(789,563)	(163,838)
Cash dividends on common stock	$ (15,654)	$ (10,694)	(5,612)
Cash dividends on preferred stock			(2,380)
Stock issued under employee benefit plans	$ 460	$ 478	479
Stock issued under dividend reinvestment and stock purchase plans	661	523	325
Stock options exercised	1,461	504	$ 115
Tax benefit from stock options exercised	$ 70	$ 60
Cumulative preferred stock redeemed (SBLF)			$ (90,783)
Stock redeemed	$ (1,640)	$ (1,067)	(491)
Net cash provided by (used in) financing activities	267,285	59,333	(36,995)
Net Change in Cash and Cash Equivalents	(16,446)	9,182	7,974
Cash and Cash Equivalents, beginning of the year	118,616	109,434	101,460
Cash and Cash Equivalents, end of year	102,170	118,616	109,434
Additional cash flow information:
Interest paid	24,903	20,412	16,639
Income tax paid	21,200	6,209	7,578
Loans transferred to other real estate owned	3,644	4,431	7,170
Fixed assets transferred to other real estate owned	1,600	297	461
Non-cash investing activities using trade date accounting	1,559	3,170	4,984
Liabilities assumed in conjunction with acquisitions
Fair value of assets acquired	635,047	280,725	$ 1,132,231
Cash received (paid) in acquisition	(14,500)	(14,208)
Less: Common stock issued	70,402	34,981	$ 135,642
Liabilities assumed	$ 550,145	$ 231,536	$ 996,589

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
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 First Merchants Corporation (the “Corporation”), and its principal wholly owned subsidiary, First Merchants Bank, N.A. (the “Bank”), conform to accounting principles generally accepted in the United States of America and reporting practices followed by the banking industry. The Bank also operates Lafayette Bank and Trust, Ameriana Bank, Ameriana Financial Services and First Merchants Trust Company as divisions of First Merchants Bank, N.A. 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 operates under a national bank charter and provides full banking services. As a national bank, the Bank is subject to the regulation of the Office of Comptroller of the Currency (“OCC”) and the Federal Deposit Insurance Corporation (“FDIC”). The OCC and the FDIC regulate or monitor virtually all areas of the Bank’s operations. The Bank must undergo regular on-site examinations by the OCC and FDIC and must submit periodic reports to both. 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 other-than-temporary impairment (“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 a decline exists that is other-than-temporary, involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time. When the Corporation does not intend to sell a debt security, and it is more likely than not, the Corporation will not have to sell the security before recovery of its cost basis, it recognizes the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. 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. 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 is 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. 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 and substantially delinquent loans may be considered to be impaired. 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. In applying the provisions of ASC 310, the Corporation considers its investment 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, except for installment loans with add-on interest, for which a method that approximates the level yield method is used. The accrual of interest on impaired loans is discontinued when, in management’s opinion, the borrower may be unable to meet payments as they become due. When 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 present value of estimated future cash flows using the loan’s existing rate, or the fair value of collateral if the loan is collateral dependent. 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 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 aggregated into pools of loans with common risk characteristics 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 expected cash flows of the acquired loans in excess of the fair values recorded is referred to as the accretable yield and is recognized in interest income over the remaining estimated lives of the loans. The Corporation will continually evaluate the fair value of the loans including cash flows expected to be collected. 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 conservative 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 a regional geographic, industry and customer level, 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 specifically identified loans, 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. Larger commercial loans 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 present value of expected future cash flows discounted at the loan’s effective interest rate or fair value of the underlying collateral. The Corporation evaluates the collectability of both principal and interest 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 21. 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 RESERVE AND FEDERAL HOME LOAN BANK STOCK are required investments for institutions that are members of the Federal Reserve Bank (“FRB”) and Federal Home Loan Bank systems. The required investment in the common stock is based on a predetermined formula based on the level of borrowings and other factors. These investments are 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 net income or expense from foreclosed assets. 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 other comprehensive income (“OCI”) 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 OCI to the extent the hedge is effective. The gains and losses on derivative instruments that are reported in OCI 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 currently in the consolidated statements of operations. 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 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 tax years still subject to examination by taxing authorities are years subsequent to 2011 . 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, 2015
Business Combinations [Abstract]
Acquisitions and Divestitures	ACQUISITIONS AND DIVESTITURES Ameriana Bancorp, Inc. On December 31, 2015, the Corporation acquired 100 percent of Ameriana Bancorp, Inc., ("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, and Indiana Bank and wholly-owned subsidiary of Ameriana, merged with and into First Merchants Bank, National Association, a national Bank and wholly-owned subsidiary of the Corporation (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 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 are expected. Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Ameriana acquisition is detailed in the following table. Prior to the end of the one year measurement period for finalizing the purchase price allocation, if information becomes available which would indicate adjustments are required to the purchase price allocation, such adjustments will be included in the purchase price allocation retrospectively. Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 60,365 Loans 319,664 Premises and equipment 14,491 Federal Home Loan Bank stock 2,693 Other real estate owned 5,719 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 7,086 Deposits (382,547 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,938 ) Subordinated Debentures (5,961 ) Other liabilities (9,451 ) Net tangible assets acquired 29,449 Core deposit intangible 3,200 Goodwill 37,753 Purchase price $ 70,402 Of the total purchase price, $3,200,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The residual 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 Corporation, ("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 expects the transaction to 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 are expected. Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair values on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the C Financial acquisition is detailed in the following table. Prior to the end of the one year measurement period for finalizing the purchase price allocation, if information becomes available which would indicate adjustments are required to the purchase price allocation, such adjustments will be included in the purchase price allocation retrospectively. 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 residual purchase price has been allocated to goodwill, which is deductible for tax purposes because the transaction was considered a taxable exchange. Community Bancshares, Inc. On November 7, 2014, the Corporation acquired 100 percent of Community Bancshares, Inc. ("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 and expand the existing footprint in central Indiana. Goodwill resulted from this transaction due to the expected synergies from combining operations. 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 residual purchase price has been allocated to goodwill, which is not deductible for tax purposes. CFS Bancorp, Inc. On November 12, 2013, the Corporation acquired 100 percent of CFS Bancorp, Inc. ("CFS") in an all stock transaction. CFS merged with and into the Corporation (the "CFS Merger") whereupon the separate corporate existence of CFS ceased and the Corporation survived. Immediately following the CFS Merger, Citizens Financial Bank, a federal savings bank and wholly-owned subsidiary of CFS, merged with and into the Bank, with the Bank continuing as the surviving bank. CFS was headquartered in Munster, Indiana and had 20 full-service banking centers serving the northwestern Indiana and northeastern Illinois areas. Pursuant to the merger agreement, the shareholders of CFS received 0.65 percent of a share of the Corporation's common stock for each share of CFS common stock held. The Corporation issued approximately 7.1 million shares of common stock, which was valued at approximately $135.6 million . The Corporation engaged in this transaction with the expectation that it would be accretive and add a new market area with a demographic profile consistent with many of the current Indiana markets served by the Bank. Goodwill resulted from this transaction due to the expected synergies from combining operations. The purchase price for the CFS acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 10,992 Interest-bearing time deposits 213,379 Investment securities available for sale 15,913 Investment securities held to maturity 14,372 Mortgage loans held for sale 189 Loans 603,114 Premises and equipment 19,643 Federal Home Loan Bank stock 6,188 Interest receivable 1,770 Cash surrender value of life insurance 36,555 Other real estate owned 12,857 Tax asset, deferred and receivable 30,717 Other assets 111,656 Deposits (955,432 ) Securities sold under repurchase agreements (9,830 ) Federal Home Loan Bank advances (15,000 ) Interest payable (294 ) Other liabilities (16,033 ) Net tangible assets acquired $ 80,756 Core deposit intangible 7,313 Goodwill 47,573 Purchase price $ 135,642 Of the total purchase price, $7,313,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The residual 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 First Merchants Insurance Services, Inc., an Indiana Corporation ("FMIG"), to USI Insurance Services LLC, a Delaware limited liability company ("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 C Financial, Community and CFS 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, 2014 and 2013 as if the Ameriana, Community and CFS 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 2013 Total revenue (net interest income plus other income) $ 291,614 $ 284,890 $ 253,668 Net income $ 60,497 $ 64,174 $ 39,979 Net income available to common shareholders $ 60,497 $ 64,174 $ 37,559 Earnings per share: Basic $ 1.49 $ 1.58 $ 0.98 Diluted $ 1.48 $ 1.57 $ 0.97 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 information for the year ended 2013 includes $4.9 million of operating revenue from CFS since the acquisition and approximately $9.5 million , net of tax, of non-recurring expenses directly attributable to the CFS 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, 2015
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, 2015 , cash and cash equivalents is defined to include cash on hand, deposits in other institutions and federal funds sold. Effective October 3, 2008, the FDIC’s insurance limits temporarily increased to $250,000 . On July 21, 2010, the Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”) was signed into law, which, in part, permanently raised the standard maximum deposit insurance amount to $250,000 . On November 9, 2010, the FDIC implemented section 343 of the Dodd-Frank Act providing unlimited insurance coverage on noninterest-bearing transaction accounts. Beginning December 31, 2010, through December 31, 2012, all noninterest-bearing transaction accounts were fully insured, regardless of the balance of the account, at all FDIC-insured institutions. As of January 1, 2013, noninterest-bearing transaction deposit accounts are no longer insured separately from other accounts at the same FDIC-insured institution. Instead, noninterest-bearing transaction accounts are added to any of the Corporation's other accounts, and the aggregate balance insured up to at least the Standard Maximum Deposit Insurance Amount of $250,000 , at each institution. At December 31, 2015 , the Corporation’s interest-bearing cash accounts and noninterest-bearing transaction deposits held at other institutions exceeded federally insured limits by approximately $63,132,000 . 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 $14,546,000 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, 2015 , was $19,288,000 .

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2015
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, 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 Available for sale at December 31, 2014 U.S. Government-sponsored agency securities $ 100 $ 9 $ 109 State and municipal 216,915 11,801 $ 123 228,593 U.S. Government-sponsored mortgage-backed securities 310,460 8,771 127 319,104 Corporate obligations 31 31 Equity securities 1,706 1,706 Total available for sale 529,212 20,581 250 549,543 Held to maturity at December 31, 2014 State and municipal 204,443 5,716 96 210,063 U.S. Government-sponsored mortgage-backed securities 426,645 11,527 512 437,660 Total held to maturity 631,088 17,243 608 647,723 Total Investment Securities $ 1,160,300 $ 37,824 $ 858 $ 1,197,266 On December 31, 2015, the Corporation acquired 100 percent of Ameriana as 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. This purchase resulted in investment securities acquired of approximately $60.4 million . 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 $178,964,000 and $73,249,000 at December 31, 2015 and 2014 , respectively. Total fair value of these investments was $177,584,000 and $72,390,000 , which was approximately 13.9 and 6.1 percent of the Corporation's available for sale and held to maturity investment portfolio at December 31, 2015 and 2014 , 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 other-than-temporary impairment (“OTTI”) is identified. The Corporation’s management has evaluated all securities with unrealized losses for OTTI as of December 31, 2015 . 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, 2015 . As noted in the table above, the mortgage-backed securities portfolio contains unrealized losses of $518,000 on twenty-six securities and $787,000 on twenty-two 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, 2015 . As noted in the table above, the state and political subdivision securities portfolio contains unrealized losses of $60,000 on twenty-two securities and $15,000 on seven securities in the available for sale and held to maturity portfolios, respectively. 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 2015 2014 Credit losses on debt securities held: Balance, January 1 $ 500 $ 11,355 Reductions for previous other-than-temporary losses realized on securities sold during the year (500 ) $ (10,855 ) Balance, December 31 $ — $ 500 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, 2015 and 2014 : Less than 12 Months 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 Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2014 State and municipal $ 1,256 $ 7 $ 9,850 $ 116 $ 11,106 $ 123 U.S. Government-sponsored mortgage-backed securities 2,186 13 5,447 114 7,633 127 Total Temporarily Impaired Available for Sale Securities 3,442 20 15,297 230 18,739 250 Temporarily Impaired Held to Maturity Securities at December 31, 2014 State and municipal 5,119 96 250 5,369 96 U.S. Government-sponsored mortgage-backed securities 9,791 82 38,491 430 48,282 512 Total Temporarily Impaired Held to Maturity Securities 14,910 178 38,741 430 53,651 608 Total Temporarily Impaired Investment Securities $ 18,352 $ 198 $ 54,038 $ 660 $ 72,390 $ 858 The amortized cost and fair value of securities available for sale and held to maturity at December 31, 2015 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, 2015 Due in one year or less $ 4,658 $ 4,704 $ 4,144 $ 4,148 Due after one through five years 13,725 14,295 28,054 29,175 Due after five through ten years 52,878 55,375 81,483 83,646 Due after ten years 220,600 231,672 106,086 109,765 291,861 306,046 219,767 226,734 U.S. Government-sponsored mortgage-backed securities 342,550 346,266 398,832 405,646 Equity securities 3,912 3,912 Certificates of deposit 2,176 2,176 Total Investment Securities $ 640,499 $ 658,400 $ 618,599 $ 632,380 Securities with a carrying value of approximately $637,358,000 , $449,408,000 and $373,533,000 were pledged at December 31, 2015 , 2014 and 2013 , respectively, to secure certain deposits and securities sold under repurchase agreements, and for other purposes as permitted or required by law. Gross gains of $2,770,000 , $3,581,000 and $487,000 were realized on sales of investment securities in 2015 , 2014 and 2013 , 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 2014 or 2013 , respectively.

Loans and Allowance

Loans and Allowance	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans and Allowance	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 December 31, 2014 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 882,596 $ 4,006 $ 53 $ 2,985 $ 7,048 $ 14,092 $ 896,688 Agriculture production financing and other loans to farmers 98,236 891 5,800 6,691 104,927 Real estate loans: Construction 204,683 1,017 82 1,439 2,538 207,221 Commercial and farmland 1,642,016 9,846 778 $ 671 19,350 30,645 1,672,661 Residential 626,821 4,876 1,831 854 12,933 20,494 647,315 Home equity 282,828 1,213 352 148 1,988 3,701 286,529 Individuals' loans for household and other personal expenditures 72,853 258 53 5 231 547 73,400 Lease financing receivables, net of unearned income 1,106 1,106 Other commercial loans 35,018 35,018 Loans $ 3,846,157 $ 22,107 $ 3,149 $ 4,663 $ 48,789 $ 78,708 $ 3,924,865 See the information regarding the analysis of loan loss experience in the “Loan Quality" and "Provision And Allowance For Loan Losses" 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. 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 that occurred during the periods ended December 31, 2015 and 2014 : 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 December 31, 2014 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 259 $ 259 1 Residential 632 622 9 Home equity 320 350 11 Individuals' loans for household and other personal expenditures 26 26 2 Total $ 1,237 $ 1,257 23 The following tables show the recorded investment of troubled debt restructurings, by modification type, that occurred during the years indicated: 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 December 31, 2014 Term Rate Combination Total Real estate loans: Commercial and farmland $ 288 $ 288 Residential 31 $ 218 $ 360 609 Home equity 100 243 343 Individuals' loans for household and other personal expenditures 23 23 Total $ 319 $ 318 $ 626 $ 1,263 Loans secured by commercial and farmland real estate made up 46 percent of the post-modification balances of the troubled debt restructured loans during the twelve months ending December 31, 2015 . The second largest class of troubled debt restructurings during 2015 was commercial and industrial loans, which accounted for 32 percent of the total post modification balances. The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2015 and 2014 , 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, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 Twelve Months Ended December 31, 2014 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 70 Total 1 $ 70 For potential consumer loan restructures, impairment evaluation occurs prior to modification. Any subsequent impairment is typically addressed through the charge off process, or may be addressed through a specific reserve. Consumer troubled debt restructurings are generally included in the general historical allowance for loan loss at the post modification balance. Consumer non-accrual and delinquent troubled debt restructurings are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. 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, 2015 and 2014 , were $9,894,000 and $7,235,000 , respectively. The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the years indicated: December 31, 2015 December 31, 2014 Commercial and industrial loans $ 1,057,075 $ 896,688 Agricultural production financing and other loans to farmers 97,711 104,927 Real estate loans: Construction 366,704 207,221 Commercial and farmland 1,802,921 1,672,661 Residential 786,105 647,315 Home equity 348,613 286,529 Individuals' loans for household and other personal expenditures 74,717 73,400 Lease financing receivables, net of unearned income 588 1,106 Other commercial loans 159,388 35,018 Loans 4,693,822 3,924,865 Allowance for loan losses (62,453 ) (63,964 ) Net Loans $ 4,631,369 $ 3,860,901 During the twelve months ended December 31, 2015, loans acquired through business combinations totaled $430,289,000 . See the information regarding the business combinations in the Note 2. ACQUISITIONS AND DIVESTITURES section of the Financial Statements and Supplementary Data included as Item 8 of this Annual Report on Form 10-K. At December 31, 2015, Other commercial loans totaled $159,388,000 , an increase of $124,370,000 from December 31, 2014. This increase was primarily a result of organic growth in the obligations of the state and political subdivisions sector of the portfolio. 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, 2015 . 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 310 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, 2015, the allowance for loan losses was $62,453,000 , a decrease of $1,511,000 from the December 31, 2014 balance of $63,964,000 . Specific reserves on impaired loans decreased $927,000 to $1,842,000 , from $2,769,000 at December 31, 2014. Net charge offs for the twelve months ended December 31, 2015, were $1,928,000 , a decrease of $4,538,000 from the same period in 2014. The provision for loan losses for the twelve months ended December 31, 2015 was $417,000 , a decrease of $2,143,000 from the same period in 2014. 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 table summarizes changes in the allowance for loan losses by loan segment for the twelve months ended December 31, 2015, 2014 and 2013: Twelve Months Ended December 31, 2015 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, January 1 $ 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, January 1 $ 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 Twelve Months Ended December 31, 2013 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, January 1 $ 25,913 $ 26,703 $ 2,593 $ 14,157 $ 69,366 Provision for losses 2,794 340 (11 ) 3,514 $ 11 6,648 Recoveries on loans 4,586 3,552 556 1,292 4 9,990 Loans charged off (6,117 ) (7,493 ) (623 ) (3,886 ) (15 ) (18,134 ) Balances, December 31, 2013 $ 27,176 $ 23,102 $ 2,515 $ 15,077 $ 67,870 The following tables show the Corporation’s allowance for loan losses and loan portfolio by loan segment for the years indicated: 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 December 31, 2014 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 1,455 $ 470 $ 194 $ 2,119 Collectively evaluated for impairment 27,369 18,207 $ 2,658 12,958 $ 3 61,195 Loans acquired with deteriorated credit quality 650 650 Total Allowance for Loan Losses $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964 Loan balances: Individually evaluated for impairment $ 16,108 $ 23,963 $ 4,022 $ 44,093 Collectively evaluated for impairment 1,011,122 1,796,797 $ 73,400 925,282 $ 1,106 3,807,707 Loans acquired with deteriorated credit quality 9,403 59,122 4,540 73,065 Loans $ 1,036,633 $ 1,879,882 $ 73,400 $ 933,844 $ 1,106 $ 3,924,865 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. Residential and Consumer 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. Uncollected interest previously recorded, but not deemed collectible, is reversed and charged against current income. 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, 2015 December 31, 2014 Commercial and industrial loans $ 4,634 $ 7,048 Agriculture production financing and other loans to farmers 827 5,800 Real estate loans: Construction 736 1,439 Commercial and farmland 11,277 19,350 Residential 11,818 12,933 Home equity 1,952 1,988 Individuals' loans for household and other personal expenditures 145 231 Total $ 31,389 $ 48,789 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 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, 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 December 31, 2013 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 35,066 $ 16,371 $ 19,209 $ 192 Agriculture production financing and other loans to farmers 32 30 32 Real estate loans: Construction 16,109 10,625 11,621 117 Commercial and farmland 128,073 83,033 84,057 1,663 Residential 6,746 3,910 4,236 75 Home equity 3,299 112 225 Other commercial loans 454 172 181 1 Total $ 189,779 $ 114,253 $ 119,561 $ 2,048 Impaired loans with related allowance: Commercial and industrial loans $ 1,390 $ 1,216 $ 683 $ 1,240 $ 9 Real estate loans: Commercial and farmland 4,657 4,215 894 4,291 9 Residential 74 71 6 76 Total $ 6,121 $ 5,502 $ 1,583 $ 5,607 $ 18 Total Impaired Loans $ 195,900 $ 119,755 $ 1,583 $ 125,168 $ 2,066 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. At December 31, 2013, the commercial impaired loan total of $119,755,000 included $69,448,000 in loans acquired from CFS. 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 not 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, 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 December 31, 2014 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 823,732 $ 24,455 $ 48,226 $ 275 $ 896,688 Agriculture production financing and other loans to farmers 96,155 1,195 7,577 104,927 Real estate loans: Construction 185,394 3,164 2,928 $ 15,588 $ 147 207,221 Commercial and farmland 1,552,781 29,484 90,161 235 1,672,661 Residential 149,430 6,321 10,918 470,972 9,674 647,315 Home equity 6,368 12 690 277,571 1,888 286,529 Individuals' loans for household and other personal expenditures 73,165 235 73,400 Lease financing receivables, net of unearned income 998 108 1,106 Other commercial loans 35,018 35,018 Loans $ 2,849,876 $ 64,631 $ 160,608 $ 275 $ 837,296 $ 12,179 $ 3,924,865 The following tables illustrate the past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated: 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 December 31, 2014 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 882,596 $ 4,006 $ 53 $ 2,985 $ 7,048 $ 14,092 $ 896,688 Agriculture production financing and other loans to farmers 98,236 891 5,800 6,691 104,927 Real estate loans: Construction 204,683 1,017 82 1,439 2,538 207,221 Commercial and farmland 1,642,016 9,846 778 $ 671 19,350 30,645 1,672,661 Residential 626,821 4,876 1,831 854 12,933 20,494 647,315 Home equity 282,828 1,213 352 148 1,988 3,701 286,529 Individuals' loans for household and other personal expenditures 72,853 258 53 5 231 547 73,400 Lease financing receivables, net of unearned income 1,106 1,106 Other commercial loans 35,018 35,018 Loans $ 3,846,157 $ 22,107 $ 3,149 $ 4,663 $ 48,789 $ 78,708 $ 3,924,865 See the information regarding the analysis of loan loss experience in the “Loan Quality" and "Provision And Allowance For Loan Losses" 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. 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 that occurred during the periods ended December 31, 2015 and 2014 : 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 December 31, 2014 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 259 $ 259 1 Residential 632 622 9 Home equity 320 350 11 Individuals' loans for household and other personal expenditures 26 26 2 Total $ 1,237 $ 1,257 23 The following tables show the recorded investment of troubled debt restructurings, by modification type, that occurred during the years indicated: 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 December 31, 2014 Term Rate Combination Total Real estate loans: Commercial and farmland $ 288 $ 288 Residential 31 $ 218 $ 360 609 Home equity 100 243 343 Individuals' loans for household and other personal expenditures 23 23 Total $ 319 $ 318 $ 626 $ 1,263 Loans secured by commercial and farmland real estate made up 46 percent of the post-modification balances of the troubled debt restructured loans during the twelve months ending December 31, 2015 . The second largest class of troubled debt restructurings during 2015 was commercial and industrial loans, which accounted for 32 percent of the total post modification balances. The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2015 and 2014 , 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, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 Twelve Months Ended December 31, 2014 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 70 Total 1 $ 70 For potential consumer loan restructures, impairment evaluation occurs prior to modification. Any subsequent impairment is typically addressed through the charge off process, or may be addressed through a specific reserve. Consumer troubled debt restructurings are generally included in the general historical allowance for loan loss at the post modification balance. Consumer non-accrual and delinquent troubled debt restructurings are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. 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, 2015
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 remaining fair value adjustment to be accreted into income over the remaining life of the loans. The following table includes the outstanding balance and carrying amount of all the performing and non-performing acquired loans, which are included in the Corporation's balance sheet at December 31, 2015 and 2014. 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 December 31, 2014 Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 8,168 $ 64,897 $ 6,059 $ 79,124 Agricultural production financing and other loans to farmers 1,100 893 1,993 Real estate loans: Construction 19,063 9,113 28,176 Commercial and farmland 74,600 251,002 15,593 341,195 Residential 28,863 144,396 7,384 180,643 Home Equity 9,881 39,244 15,758 64,883 Individuals' loans for household and other personal expenditures 1,314 922 121 2,357 Other commerical loans 86 86 Total $ 142,989 $ 509,660 $ 45,808 $ 698,457 Carrying Amount $ 134,198 $ 484,949 $ 39,324 $ 658,471 Allowance 650 650 Carrying Amount Net of Allowance $ 134,198 $ 484,299 $ 39,324 $ 657,821 Certain purchased credit impaired loans with subsequent deterioration since acquisition required an allowance for loan losses and corresponding provision expense of $153,000 and $650,000 at December 31, 2015 and 2014, respectively. 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 table below. Twelve Months Ended December 31, 2015 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,122 $ 2,400 $ 868 $ 5,390 Additions $ 2,848 $ 145 2,993 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 $ 2,848 $ 114 $ 1,508 $ 1,188 $ 642 $ 6,300 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 Twelve Months Ended December 31, 2013 CFS SCB Total Beginning balance $ 1,715 $ 1,715 Additions $ 3,502 3,502 Accretion (10 ) (463 ) (473 ) Reclassification from nonaccretable 672 177 849 Disposals (41 ) (41 ) Ending balance $ 4,164 $ 1,388 $ 5,552 The following table presents loans acquired during the periods ending December 31, 2015 and 2014, for which it was probable at acquisition that all contractually required payments would not be collected: 2015 2014 Ameriana C Financial Total Community Contractually required payments receivable at acquisition date $ 29,093 $ 2,632 $ 31,725 $ 26,032 Nonaccretable difference 13,728 637 14,365 3,498 Expected cash flows at acquisition date 15,365 1,995 17,360 22,534 Accretable difference 2,848 145 2,993 2,234 Basis in loans at acquisition date $ 12,517 $ 1,850 $ 14,367 $ 20,300

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : 2015 2014 Cost at December 31: Land $ 26,510 $ 19,373 Buildings and Leasehold Improvements 115,461 99,451 Equipment 64,892 56,606 Total Cost 206,863 175,430 Accumulated Depreciation and Amortization (109,215 ) (97,739 ) Net $ 97,648 $ 77,691 The Ameriana acquisition on December 31, 2015 and the C Financial acquisition on April 17, 2015 resulted in additions to premises and equipment of $14,491,000 and $7,290,000 , respectively. Additionally, on November 7, 2014, the Community acquisition resulted in an addition to premises and equipment of $3,610,000 . 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 2015 , 2014 and 2013 was $3,456,000 , $3,258,000 and $2,608,000 , respectively. The future minimum rental commitments required under the operating leases in effect at December 31, 2015 , expiring at various dates through the year 2035 are as follows for the years ending December 31: Future Minimum Rental Commitments 2016 $ 3,076 2017 2,353 2018 1,419 2019 1,222 2020 1,060 After 2020 6,629 Total Future Minimum Obligations $ 15,759

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2015
Goodwill Disclosure [Abstract]
Goodwill	GOODWILL The Ameriana acquisition on December 31, 2015 and the C Financial acquisition on April 17, 2015 resulted in goodwill of $37,753,000 and $11,126,000 , respectively. On June 12, 2015, the sale of FMIG resulted in a goodwill reduction of $8,474,000 . Additionally, on November 7, 2014, the Community acquisition resulted in goodwill of $13,776,000 . 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 2015 or 2014. The Corporation tested goodwill for impairment during 2015 and 2014. 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. 2015 2014 Balance, January 1 $ 202,724 $ 188,948 Goodwill acquired 48,879 13,776 Goodwill reduction $ (8,474 ) Balance, December 31 $ 243,129 $ 202,724

Core Deposit and Other Intangib

Core Deposit and Other Intangibles	12 Months Ended
	Dec. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Core Deposit and Other Intangibles	CORE DEPOSIT AND OTHER INTANGIBLES The Ameriana acquisition on December 31, 2015 and the C Financial acquisition on April 17, 2015 resulted in a core deposit intangible of $3,200,000 and $981,000 , respectively. On June 12, 2015, the sale of FMIG resulted in an other intangible reduction of $742,000 . Additionally, on November 7, 2014, the Community acquisition resulted in a core deposit intangible of $4,658,000 . 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. 2015 2014 Gross carrying amount $ 58,360 $ 53,702 Core deposit intangible and other intangibles acquired 4,181 4,658 Accumulated amortization (45,164 ) (42,329 ) Core deposit intangible and other intangibles reduction (742 ) Core Deposit and Other Intangibles $ 16,635 $ 16,031 Amortization expense for the years ended December 31, 2015 , 2014 and 2013 , was $2,835,000 , $2,445,000 and $1,649,000 , respectively. Estimated future amortization expense is summarized as follows: Amortization Expense 2016 $ 3,055 2017 3,017 2018 1,904 2019 1,676 2020 1,618 After 2020 5,365 Total Future Minimum Obligations $ 16,635

Deposits

Deposits	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposits	DEPOSITS The composition of the deposit portfolio is included in the table below for the years indicated: December 31, 2015 December 31, 2014 Demand deposits $ 2,576,283 $ 2,146,492 Savings deposits 1,518,722 1,376,707 Certificates and other time deposits of $100,000 or more 323,698 260,685 Other certificates and time deposits 556,476 523,010 Brokered deposits 314,468 333,800 Total deposits $ 5,289,647 $ 4,640,694 At December 31, 2015, the contractual maturities of time deposits are summarized as follows: Certificates and Other Time Deposits 2016 $ 600,551 2017 272,652 2018 126,929 2019 74,750 2020 55,187 After 2020 64,573 $ 1,194,642

Transfers Accounted for as Secu

Transfers Accounted for as Secured Borrowings	12 Months Ended
	Dec. 31, 2015
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, 2015 were: 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, 2015
Debt Disclosure [Abstract]
Borrowings	BORROWINGS The following table summarizes the Corporation's borrowings as of December 31, 2015 and 2014: December 31, 2015 December 31, 2014 Federal funds purchased $ 49,721 $ 15,381 Securities sold under repurchase agreements 155,325 124,539 Federal Home Loan Bank advances 235,652 145,264 Subordinated debentures and term loans 127,846 126,810 Total Borrowings $ 568,544 $ 411,994 Securities sold under repurchase agreements consist of obligations of the Bank to other parties. The obligations are secured by U.S. Treasury and U.S. Government-Sponsored Enterprise obligations, certain municipal securities and mortgage loans. The maximum amount of outstanding agreements at any month-end during 2015 and 2014 totaled $163,128,000 and $155,941,000 , respectively, and the average of such agreements totaled $143,491,000 and $130,910,000 during 2015 and 2014 , respectively. Maturities of borrowings as of December 31, 2015 , are as follows: Maturities in Years Ending December 31: Federal Funds Purchased Securities Sold Federal Home Subordinated 2016 $ 49,721 $ 155,325 $ 91,441 $ 183 2017 37,222 2018 26,851 2019 13,828 2020 31,310 After 2020 35,000 132,012 ASC 805 fair value adjustments at acquisition (4,349 ) $ 49,721 $ 155,325 $ 235,652 $ 127,846 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 146 percent of these advances depending on the type of collateral pledged. Advances, with interest rates from 0 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, 2015 , was $388,176,000 . As of December 31, 2015, the Corporation had $25,000,000 putable advances with the FHLB. Additionally as part of the Ameriana acquisition on December 31, 2015, the Corporation assumed approximately $24,938,000 of Federal Home Loan Bank Advances. The C Financial acquisition on April 17, 2015 resulted in an additional $18,958,000 of Federal Home Loan Bank advances at acquisition, of which approximately $7,361,000 matured during 2015 and $11,597,000 remained at December 31, 2015. Subordinated Debentures and Term Loans . As of December 31, 2015 , subordinated debentures and term loans totaled $127,846,000 . • 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, 2015, $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, 2015 was 2.1 percent . 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. 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, 2015 was 2.0 percent . 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. The Senior Debt agreement contains certain customary representations and warranties and financial and negative covenants. As of December 31, 2015 , the Corporation was in compliance with these covenants. Line of Credit . As of December 31, 2015 , there was no outstanding balance on the line of credit. • U.S. Bank, N.A. 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 . As of December 31, 2015, there was no outstanding balance on the line of credit. Interest is payable quarterly based on one-month LIBOR plus 2.00 percent . The line of credit has a quarterly facility fee of 0.25 percent on the unused balance. The line of credit agreement contains certain customary representations and warranties and financial and negative covenants. As of December 31, 2015, the Corporation was in compliance with these covenants. The line of credit was renewed on April 9, 2015 and will mature on April 8, 2016. Subordinated Debentures and Term Loans . As of December 31, 2014 , subordinated debentures and term loans totaled $126,810,000 . • First Merchants Capital Trust II . The subordinated debenture, entered into on July 2, 2007, for $56,702,000 will mature on 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, 2014 was 1.8 percent . The Corporation holds all of the outstanding common securities of First Merchants Capital Trust II. • 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. The Senior Debt agreement contains certain customary representations and warranties and financial and negative covenants. As of December 31, 2014, the Corporation was in compliance with these covenants. The net proceeds of the placement were used to pay off the Corporation's $55 million credit facility with Bank of America, N.A. which was scheduled to mature on February 15, 2015. Line of Credit . As of December 31, 2014 , there was no outstanding balance on the line of credit. • U. S. Bank, N.A. On April 11, 2014, the Corporation entered into a line of credit agreement with the U. S. Bank, N.A. with a maximum borrowing capacity of $20 million . As of December 31, 2014, there was no outstanding balance on the line of credit. Interest is payable quarterly based on one-month LIBOR plus 2.00 percent . The line of credit has a quarterly facility fee of 0.25 percent on the unused balance. The maturity date for the line of credit is April 10, 2015. The line of credit agreement contains certain customary representations and warranties and financial and negative covenants. As of December 31, 2014, the Corporation was in compliance with these covenants.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2015
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. 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, 2015 and December 31, 2014 . Asset Derivatives Liability Derivatives December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 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 $ 36 Other Assets $ 137 Other Liabilities $ 2,921 Other Liabilities $ 2,650 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 4,938 Other Assets $ 3,730 Other Liabilities $ 5,149 Other Liabilities $ 3,887 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, 2015 and 2014 , 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 2015 , $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, 2015 and 2014 , 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 $1,157,000 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, 2015 , the notional amount of customer-facing swaps was approximately $192,759,000 . This amount is offset with third party counterparties, as described above. 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, 2015 , 2014 and 2013 . Derivatives Not Location of Gain Amount of Gain (Loss) Amount of Gain (Loss) Amount of Gain (Loss) Interest rate contracts Other income $ (53 ) $ (73 ) $ 247 Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative Location of Loss Reclassified from Accumulated Other Comprehensive Income (Effective Portion) Amount of Loss Reclassified from Other Comprehensive Income into Income 2015 2014 2015 2014 2013 Interest rate products $ (1,681 ) $ (3,996 ) Interest expense $ (1,427 ) $ (1,411 ) $ (935 ) 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, 2015 , the termination value of derivatives in a net liability position related to these agreements was $8,367,000 . As of December 31, 2015 , the Corporation has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral of $11,690,000 . If the Corporation had breached any of these provisions at December 31, 2015 , 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, 2015
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. There are no securities classified within Level 1 of the hierarchy. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics or discounted cash flows. Level 2 securities include agencies, government-sponsored mortgage backs, state and municipal and equity securities and certificates of deposit. 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 on 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, 2015 and 2014 . 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 Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 109 $ 109 State and municipal 228,593 221,982 $ 6,611 U.S. Government-sponsored mortgage-backed securities 319,104 319,104 Corporate obligations 31 31 Equity securities 1,706 1,702 4 Interest rate swap asset 3,730 3,730 Interest rate cap 137 137 Interest rate swap liability 6,537 6,537 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, 2015 and 2014 . Available for Sale Securities For The Year Ended December 31, 2015 December 31, 2014 Beginning Balance $ 6,646 $ 9,977 Included in other comprehensive income 199 3,656 Principal payments (913 ) (6,987 ) Ending balance $ 5,932 $ 6,646 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, 2015 or 2014 . TRANSFERS BETWEEN LEVELS There were no transfers in or out of Level 3 during 2015 or 2014. 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, 2015 and 2014 . 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 Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 17,134 $ 17,134 Other real estate owned $ 5,155 $ 5,155 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 2015 , 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 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, 2015 and 2014 . 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%) December 31, 2014 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 6,611 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) $ 17,134 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 50% (3%) Other real estate owned $ 5,155 Appraisals Discount to reflect current market conditions 0% - 20% (7%) 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, 2015 and 2014 . 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 2014 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 118,616 $ 118,616 Interest-bearing time deposits 47,520 47,520 Investment securities available for sale 549,543 $ 542,897 $ 6,646 Investment securities held to maturity 631,088 614,457 33,266 Loans held for sale 7,235 7,235 Loans 3,860,901 3,810,912 Federal Reserve and Federal Home Loan Bank stock 41,353 41,353 Interest rate swap asset 3,867 3,867 Interest receivable 19,984 19,984 Liabilities at December 31: Deposits $ 4,640,694 $ 3,532,199 $ 1,099,610 Borrowings: Federal funds purchased 15,381 15,381 Securities sold under repurchase agreements 124,539 124,539 Federal Home Loan Bank advances 145,264 146,669 Subordinated debentures and term loans 126,810 92,802 Interest rate swap liability 6,537 6,537 Interest payable 3,201 3,201 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, 2015
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: 2015 2014 Amounts of commitments: Loan commitments to extend credit $ 1,547,048 $ 1,617,552 Standby letters of credit $ 46,734 $ 52,655 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.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY National banking laws restrict the maximum amount of dividends that a bank may pay in any calendar year. National banks are limited to the bank’s retained net income (as defined) for the current year plus those for the previous two years. The amount at December 31, 2015 , available for 2016 dividends from the Corporation’s subsidiaries (both banking and non-banking) was $29,812,000 . Total stockholders' equity for all subsidiaries at December 31, 2015 , was $930,360,000 of which $900,548,000 was restricted from dividend distribution to the Corporation. 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. Preferred Stock On September 22, 2011 , the Corporation entered into a Securities Purchase Agreement with the Treasury, pursuant to which the Corporation issued 90,782.94 shares of the Corporation’s Senior Non-Cumulative Perpetual Preferred Stock, Series B (the “Series B Preferred Stock”), having a liquidation amount per share equal to $1,000 , for a total purchase price of $90,782,940 . The Purchase Agreement was entered into, and the Series B Preferred Stock was issued, pursuant to the SBLF program, a $30 billion fund established under the Small Business Jobs Act of 2010, that encourages lending to small businesses by providing capital to qualified community banks with assets of less than $10 billion. On January 3, 2013, the Corporation redeemed 22,695.94 shares of the Series B Preferred Stock held by the Treasury at an aggregate redemption price of $22,695,940 plus accrued but unpaid dividends. Following the redemption, the Treasury held 68,087 shares of the Series B Preferred Stock representing a remaining liquidation amount of approximately $68 million . On July 2, 2013, the Corporation redeemed an additional 34,044 shares of the Series B Preferred Stock held by the Treasury at an aggregate redemption price of $34,044,000 plus accrued but unpaid dividends. Following the redemption, the Treasury held 34,043 shares of the Series B Preferred Stock representing a remaining liquidation amount of approximately $34 million . On November 22, 2013, the Corporation redeemed the final 34,043 shares of the Series B Preferred Stock held by the Treasury at an aggregate redemption price of $34,043,000 plus accrued but unpaid dividends. There are no shares of the Corporation's Series B Preferred Stock currently outstanding. CFS Acquisition On November 12, 2013, the Corporation acquired 100 percent of CFS Bancorp, Inc. ("CFS") in an all stock transaction. Pursuant to the merger agreement, the shareholders of CFS received 0.65 percent of a share of the Corporation's common stock for each share of CFS Bancorp common stock held. The Corporation issued approximately 7.1 million shares of common stock, which was valued at approximately $135.6 million . Community Acquisition On November 7, 2014, the Corporation acquired 100 percent of Community Bancshares, Inc. ("Community"). 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 First Merchants' 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 . Ameriana Acquisition On December 31, 2015, the Corporation acquired 100 percent of Ameriana Bancorp, Inc., ("Ameriana"). Pursuant to the merger agreement, each Ameriana shareholder received 0.9037 of a share of First Merchants common stock for each outstanding share of Ameriana Bancorp common stock held. The Corporation issued approximately 2.8 million shares of common stock, which was valued at approximately $70.4 million .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Securities Available for Sale for which a Portion of Other-Than-Temporary Impairment has been Recognized in Income Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total 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 ) Balance at December 31, 2013 $ 1,566 $ (1,847 ) $ (501 ) $ (5,628 ) $ (6,410 ) Other comprehensive income before reclassifications 14,860 1,847 (2,599 ) (7,580 ) 6,528 Amounts reclassified from accumulated other comprehensive income (2,328 ) 918 (338 ) (1,748 ) Period change 12,532 1,847 (1,681 ) (7,918 ) 4,780 Balance at December 31, 2014 $ 14,098 $ — $ (2,182 ) $ (13,546 ) $ (1,630 ) 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 twelve months ended December 31, 2015 , 2014 and 2013 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Year Ended December 31, Details about Accumulated Other Comprehensive Income (Loss) Components 2015 2014 2013 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 2,670 $ 3,581 $ 487 Other income - net realized gains on sales of available for sale securities Related income tax expense (934 ) (1,253 ) (170 ) Income tax expense $ 1,736 $ 2,328 $ 317 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (1,427 ) $ (1,411 ) $ (935 ) Interest expense - subordinated debentures and term loans Related income tax benefit 499 493 327 Income tax expense $ (928 ) $ (918 ) $ (608 ) Unrealized gains (losses) on defined benefit plans Amortization of net loss and prior service costs $ 305 $ 520 $ (1,765 ) Other expenses - salaries and employee benefits Related income tax benefit (expense) (107 ) (182 ) 618 Income tax expense $ 198 $ 338 $ (1,147 ) Total reclassifications for the period, net of tax $ 1,006 $ 1,748 (1,438 ) (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

Regulatory Capital	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Regulatory Capital	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 common equity tier 1 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 common equity tier 1 capital to risk-weighted assets ratio. The capital conservation buffer is being phased in from zero percent to 2.50 percent by 2019. Under Basel III, the Corporation and Bank elected to opt-out of including accumulated other comprehensive income in regulatory capital. Regulatory capital ratios at December 31, 2015 , were calculated under Basel III while regulatory capital ratios at December 31, 2014, were calculated under Basel I. As of December 31, 2015 , 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, 2015 and December 31, 2014 were as follows: 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 % Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 685,507 15.34 % $ 357,581 8.00 % N/A N/A First Merchants Bank 653,169 14.64 356,884 8.00 $ 446,105 10.00 % Tier 1 capital to risk weighted assets First Merchants Corporation $ 564,535 12.63 % $ 178,791 4.00 % N/A N/A First Merchants Bank 597,305 13.39 178,442 4.00 $ 267,663 6.00 % Tier 1 capital to average assets First Merchants Corporation $ 564,535 10.15 % $ 222,533 4.00 % N/A N/A First Merchants Bank 597,305 10.56 226,339 4.00 $ 282,953 5.00 %

Loan Servicing

Loan Servicing	12 Months Ended
	Dec. 31, 2015
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 $312,204,000 , $254,223,000 and $271,871,000 at December 31, 2015 , 2014 and 2013 , respectively. The amount of capitalized servicing assets is considered immaterial.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock options and restricted stock awards ("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, 2015 , the Corporation did not have any outstanding DSUs. The Corporation’s 2009 Employee Stock Purchase Plan (“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, 2015 , 2014 , and 2013 was $2,270,000 , $2,177,000 , and $1,773,000 , 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 2015. The estimated fair value of the stock options granted during 2014 and 2013 was calculated using a Black-Scholes option pricing model. The following summarizes the assumptions used in the Black-Scholes model for those options granted in 2014 and 2013: 2014 2013 Risk-free interest rate 2.41 % 1.25 % Expected price volatility 45.05 % 45.68 % Dividend yield 2.73 % 2.96 % Forfeiture rate 5.46 % 4.73 % Weighted-average expected life, until exercise 7.74 years 7.27 years 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 5.5 percent for the year ended December 31, 2015 , based on historical experience. The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense: Year Ended Year Ended Year Ended 2015 2014 2013 Stock and ESPP Options Pre-tax compensation expense $ 101 $ 237 $ 253 Income tax expense (benefit) 4 (47 ) (16 ) Stock and ESPP option expense, net of income taxes $ 105 $ 190 $ 237 Restricted Stock Awards Pre-tax compensation expense $ 2,169 $ 1,940 $ 1,520 Income tax benefit (749 ) (679 ) (531 ) Restricted stock awards expense, net of income taxes $ 1,420 $ 1,261 $ 989 Total Share-Based Compensation: Pre-tax compensation expense $ 2,270 $ 2,177 $ 1,773 Income tax benefit (745 ) (726 ) (547 ) Total share-based compensation expense, net of income taxes $ 1,525 $ 1,451 $ 1,226 As of December 31, 2015 , unrecognized compensation expense related to RSAs was $3,269,000 and is expected to be recognized over weighted-average period of 1.28 years . The Corporation did no t have any unrecognized compensation expense related to stock options as of December 31, 2015 . Stock option activity under the Corporation's stock option plans, as of December 31, 2015 , and changes during the year ended December 31, 2015 , were as follows: Number of Weighted-Average Weighted Average Aggregate Outstanding at January 1, 2015 737,931 $ 20.99 Exercised (96,066 ) $ 15.21 Canceled (199,853 ) $ 25.99 Outstanding December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319 Vested and Expected to Vest at December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319 Exercisable at December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319 There were no options granted during the year ended December 31, 2015 . The weighted-average grant date fair value was $8.13 and $5.73 for stock options granted during the years ended December 31, 2014 and 2013 , respectively. 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 2015 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, 2015 . 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, 2015 and 2014 was $921,000 and $392,000 , respectively. Cash receipts of stock options exercised during 2015 and 2014 were $1,461,000 and $504,000 , respectively. The following table summarizes information on unvested RSAs outstanding as of December 31, 2015 : Number of Weighted-Average Unvested RSAs at January 1, 2015 385,450 $ 15.65 Granted 125,050 $ 23.48 Forfeited (6,419 ) $ 17.99 Vested (149,577 ) $ 11.88 Unvested RSAs at December 31, 2015 354,504 $ 19.65 The grant date fair value of ESPP options was estimated at the beginning of the October 1, 2015, quarterly offering period of approximately $23,000 . The ESPP options vested during the three months ending December 31, 2015 , leaving no unrecognized compensation expense related to unvested ESPP options at December 31, 2015 .

Pension and Other Post Retireme

Pension and Other Post Retirement Benefit Plans	12 Months Ended
	Dec. 31, 2015
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 20 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, 2015 and 2014 . 2015 2014 Change in Benefit Obligation: Benefit obligation at beginning of year $ 80,650 $ 62,270 Service cost 55 73 Interest cost 3,087 3,235 Actuarial loss (gain) (5,617 ) 12,968 Benefits paid (6,428 ) (5,541 ) Net transfers in from CFS acquisition 7,645 Benefit obligation at end of year $ 71,747 $ 80,650 Change in Plan Assets: Fair value of plan assets at beginning of year $ 77,139 $ 69,871 Actual return on plan assets 153 5,232 Employer contributions 532 504 Benefits paid (6,428 ) (5,541 ) CFS acquisition 7,073 End of year 71,396 77,139 Funded status at end of year $ (351 ) $ (3,511 ) Assets and Liabilities Recognized in the Balance Sheets: Deferred tax asset $ 7,461 $ 8,541 Assets $ 4,006 $ 1,329 Liabilities $ 4,357 $ 4,840 Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost Consist of: Accumulated loss $ (13,857 ) $ (15,863 ) Prior service credit (305 ) (346 ) $ (14,162 ) $ (16,209 ) The actuarial gain recognized in 2015 was primarily due to an increase in the discount rate assumption from 4.00% at December 31, 2014 to 4.50% at December 31, 2015. The actuarial loss recognized in 2014 was primarily due to two factors. The first factor was a decrease in the discount rate assumption from 4.80% at December 31, 2013 to 4.00% at December 31, 2014. The second factor contributing to the loss was the Corporation's adoption of the Society of Actuaries new mortality tables. 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 will be merged into the First Merchants Corporation Retirement Plan. A liability of $5,435,000 has been recorded as the estimated final contribution to the Pentegra Plan to complete the withdrawal. The merging of the plan assets and liabilities is expected to occur in early 2016. The accumulated benefit obligation for all defined benefit plans was $71,747,000 and $80,650,000 at December 31, 2015 and 2014 , respectively. Information for pension plans with an accumulated benefit obligation in excess of plan assets is included in the table below. December 31, 2015 December 31, 2014 Projected benefit obligation $ 4,357 $ 4,840 Accumulated benefit obligation $ 4,357 $ 4,840 Fair value of plan assets The following table shows the components of net periodic pension costs: December 31, 2015 December 31, 2014 December 31, 2013 Service cost $ 55 $ 73 $ 131 Interest cost 3,087 3,235 2,670 Expected return on plan assets (4,471 ) (4,467 ) (4,265 ) Amortization of prior service costs 64 81 25 Amortization of net loss 1,722 478 2,131 Net periodic pension (benefit) cost $ 457 $ (600 ) $ 692 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): December 31, 2015 December 31, 2014 December 31, 2013 Net periodic pension (benefit) cost $ 457 $ (600 ) $ 692 Net gain (loss) 1,299 (12,203 ) 11,942 Amortization of loss 1,722 478 2,131 Amortization of prior service cost 64 81 25 Total recognized in other comprehensive income (loss) 3,085 (11,644 ) 14,098 Total recognized in net periodic pension cost and other comprehensive income (loss) $ 2,628 $ (11,044 ) $ 13,406 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, 2015 December 31, 2014 December 31, 2013 Amortization of net loss $ (1,505 ) $ (1,770 ) $ (533 ) Amortization of prior service cost (61 ) (64 ) (25 ) Total $ (1,566 ) $ (1,834 ) $ (558 ) Significant assumptions include: December 31, 2015 December 31, 2014 December 31, 2013 Weighted-average Assumptions Used to Determine Benefit Obligation: Discount rate 4.50 % 4.00 % 4.80 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % Weighted-average Assumptions Used to Determine Cost: Discount rate 4.00 % 4.80 % 4.00 % Expected return on plan assets 6.00 % 6.00 % 7.00 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % At December 31, 2015 and 2014 , 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 Employee Retirement Income Security Act of 1974 ("ERISA") and any other applicable statutes. The plans’ risk management practices include quarterly 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 non-investment grade bonds. 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 . At December 31, 2014 , the maturities of the plans’ debt securities ranged from 15 days to 9.59 years , with a weighted average maturity of 5.02 years . The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid as of December 31, 2015 . The minimum contribution required in 2016 will likely be zero but the Corporation may decide to make a discretionary contribution during the year. 2016 $ 4,814 2017 4,729 2018 4,657 2019 4,838 2020 4,772 After 2020 24,440 $ 48,250 Plan assets are re-balanced quarterly. At December 31, 2015 and 2014 , plan assets by category are as follows: December 31, 2015 December 31, 2014 Actual Target Actual Target Cash and cash equivalents 2.2 % 2.0 % 2.6 % 2.0 % Equity securities 58.1 60.0 58.7 60.0 Debt securities 37.4 36.0 36.5 36.0 Alternative investments 2.3 2.0 2.2 2.0 100.0 % 100.0 % 100.0 % 100.0 % The First Merchants Corporation Retirement and Income Savings Plan (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 $3,526,000 , $3,396,000 and $3,138,000 for 2015 , 2014 and 2013 , 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 obligations payable under the plans totaled $1,403,000 and $1,811,000 at December 31, 2015 and 2014 , respectively. Post retirement plan expense totaled $(127,000) , $97,000 and $519,000 for the years ending December 31, 2015 , 2014 and 2013 , 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 $52,433,000 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 $18,963,000 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, 2015 and 2014 . Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs 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 Fair Value Measurements Using Quoted Prices in Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 2,032 $ 2,032 Corporate Bonds and Notes 9,384 9,384 Government Agency and Municipal Bonds and Notes 8,252 $ 8,252 Certificates of Deposit 1,001 1,001 Party-in-Interest Investments Common Stock 1,376 1,376 Common Bond Fund 4,615 4,615 Common Equity Fund 5,858 5,858 Mutual Funds Taxable Bond 4,987 4,987 Large Cap Equity 21,185 21,185 Mid Cap Equity 9,434 9,434 Small Cap Equity 3,872 3,872 International Equity 3,474 3,474 Specialty Alternative Equity 1,669 1,669 $ 77,139 $ 57,413 $ 19,726

Income Tax

Income Tax	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax	INCOME TAX The reconciliation between the statutory and actual income tax expense (benefit) is summarized in the following table for the years indicated: 2015 2014 2013 Income Tax Expense for the Year Ended December 31: Currently Payable: Federal $ 21,221 $ 7,075 $ 13,737 State Deferred: Federal 3,952 14,538 2,147 State 492 510 Total Income Tax Expense $ 25,665 $ 22,123 $ 15,884 Reconciliation of Federal Statutory to Actual Tax Expense: Federal Statutory Income Tax at 35% $ 31,867 $ 28,800 $ 21,145 Tax-exempt Interest Income (7,083 ) (5,148 ) (3,923 ) Basis Difference on Sale of Insurance Subsidiary 2,252 Stock Compensation 34 36 50 Earnings on Life Insurance (1,012 ) (1,271 ) (905 ) Tax Credits (583 ) (911 ) (857 ) Other 190 617 374 Actual Tax Expense $ 25,665 $ 22,123 $ 15,884 Tax expense applicable to security gains and losses, including unrealized losses relating to other-than-temporary impairment charges, for the years ended December 31, 2015 , 2014 and 2013 , was $435,000 , $760,000 and $157,000 , respectively. The Corporation or one of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. With a few exceptions, the Corporation is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2012 . The tax effects of temporary differences related to deferred taxes shown on the balance sheets were: 2015 2014 Deferred Tax Asset at December 31: Assets: Differences in Accounting for Loan Losses $ 25,867 $ 26,665 Differences in Accounting for Loan Fees 762 747 Differences in Accounting for Loans and Securities 9,359 9,910 Deferred Compensation 5,100 5,234 Difference in Accounting for Pensions and Other Employee Benefits 2,247 1,084 Federal & State Income Tax Loss Carryforward and Credits 23,737 23,977 Other 9,310 8,535 Total Assets 76,382 76,152 Liabilities: Differences in Depreciation Methods 7,742 8,220 State Income Tax 591 591 Net Unrealized Gain on Securities Available for Sale 6,636 7,591 Gain on FDIC Modified Whole Bank Transaction 1,405 1,694 Other 717 1,096 Total Liabilities 17,091 19,192 Net Deferred Tax Asset Before Valuation Allowance 59,291 56,960 Valuation allowance: Beginning Balance (17,568 ) (17,171 ) Decrease/(Increase) During the Year 1,832 (397 ) Ending Balance (15,736 ) (17,568 ) Net Deferred Tax Asset $ 43,555 $ 39,392 The $4,163,000 increase in the Corporation’s net deferred tax asset was primarily driven by a $9,262,000 increase resulting from the Ameriana acquisition. The largest offsetting deferred tax asset decreases not related to the Ameriana acquisition were associated with accounting for loans, federal net operating loss carryforwards, deferred compensation, and allowance for loan losses of $1,873,000 , $1,662,000 , $857,000 and $789,000 , 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 $955,000 . The Corporation has recorded a valuation allowance of $15,736,000 related to deferred state taxes as it does not anticipate having future state taxable income sufficient to fully utilize the deferred state tax asset. This is primarily due to the Corporation’s current tax structure as discussed in the “INCOME TAXES” 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. As of December 31, 2015 , the Corporation had approximately $121,626,000 of state tax loss carryforward available to offset future state taxes. This state loss carryforward has a valuation allowance of approximately $120,369,000 . 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 a 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, 2015 , would have been approximately $8,847,000 .

Net Income Per Share

Net Income Per Share	12 Months Ended
	Dec. 31, 2015
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: 2015 2014 2013 Weighted-Average Shares Weighted-Average Shares Weighted-Average Shares Basic net income per share: $ 65,384 $ 60,162 $ 44,530 Preferred stock dividends (2,380 ) Net income available to common stockholders 65,384 37,816,399 $ 1.73 60,162 36,266,356 $ 1.66 42,150 29,731,420 $ 1.42 Effect of dilutive stock options and warrants 271,834 288,253 276,960 Diluted net income per share: Net income available to common stockholders $ 65,384 38,088,233 $ 1.72 $ 60,162 36,554,609 $ 1.65 $ 42,150 30,008,380 $ 1.41 Options to purchase 286,119 , 543,514 , and 800,674 shares of common stock with weighted average exercise prices of $19.99 , $20.99 , and $21.32 at December 31, 2015 , 2014 and 2013 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, 2015
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, 2015 and 2014 : 2015 2014 First Second Third Fourth First Second Third Fourth Interest income $ 52,944 $ 55,202 $ 56,538 $ 56,514 $ 51,009 $ 51,527 $ 53,290 $ 53,053 Interest expense 5,968 6,171 6,215 6,440 5,117 5,408 5,424 5,893 Net interest income 46,976 49,031 50,323 50,074 45,892 46,119 47,866 47,160 Provision for loan losses 417 1,600 960 Net interest income after provision for loan losses 46,976 48,614 50,323 50,074 45,892 46,119 46,266 46,200 Non-interest income 16,232 24,633 16,899 14,767 15,434 16,179 18,412 16,375 Non-interest expense 41,202 46,423 43,598 46,246 43,089 41,250 42,576 41,677 Income before income tax expense 22,006 26,824 23,624 18,595 18,237 21,048 22,102 20,898 Income tax expense 5,834 8,856 6,557 4,418 4,617 5,888 5,980 5,638 Net income available to common stockholders $ 16,172 $ 17,968 $ 17,067 $ 14,177 $ 13,620 $ 15,160 $ 16,122 $ 15,260 Basic EPS $ 0.43 $ 0.47 $ 0.46 $ 0.37 $ 0.38 $ 0.42 $ 0.45 $ 0.41 Diluted EPS $ 0.43 $ 0.47 $ 0.45 $ 0.37 $ 0.38 $ 0.41 $ 0.45 $ 0.41 Average Shares Outstanding: Basic 37,709,883 37,793,448 37,850,827 37,908,873 35,956,436 36,026,763 36,054,867 37,018,014 Diluted 38,000,074 38,043,359 38,118,199 38,190,694 36,260,624 36,294,149 36,328,981 37,323,276

Condensed Financial Information

Condensed Financial Information (parent company only)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information (parent company only)	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, 2015 December 31, 2014 Assets Cash $ 43,622 $ 36,044 Investment in subsidiaries 932,372 820,123 Goodwill 448 448 Other assets 9,668 6,281 Total assets $ 986,110 $ 862,896 Liabilities Borrowings $ 127,663 $ 126,702 Other liabilities 7,938 9,367 Total liabilities 135,601 136,069 Stockholders' equity 850,509 726,827 Total liabilities and stockholders' equity $ 986,110 $ 862,896 Condensed Statements of Income and Comprehensive Income December 31, 2015 December 31, 2014 December 31, 2013 Income Dividends from subsidiaries $ 39,032 $ 53,231 $ 63,732 Gain on the sale of insurance subsidiary 8,265 Gain on cancellation of subordinated debentures 1,250 Other income 197 538 45 Total income 48,744 53,769 63,777 Expenses Interest expense 6,661 6,616 3,531 Salaries and employee benefits 3,023 3,128 3,284 Net occupancy and equipment expenses 464 442 258 Other outside services 1,455 458 1,141 Professional services 636 409 648 Other expenses 1,234 1,132 870 Total expenses 13,473 12,185 9,732 Income before income tax benefit (expense) and equity in undistributed income of subsidiaries 35,271 41,584 54,045 Income tax benefit (expense) (974 ) 3,999 3,153 Income before equity in undistributed income of subsidiaries 34,297 45,583 57,198 Equity in undistributed (distributions in excess of) income of subsidiaries 31,087 14,579 (12,668 ) Net income 65,384 60,162 44,530 Preferred stock dividends and discount accretion (2,380 ) Net income available to common stockholders $ 65,384 $ 60,162 $ 42,150 Net income $ 65,384 $ 60,162 $ 44,530 Other comprehensive income (loss) 268 4,780 (911 ) Comprehensive income $ 65,652 $ 64,942 $ 43,619 Condensed Statement of Cash Flows Year Ended December 31, 2015 2014 2013 Cash Flow From Operating Activities: Net income $ 65,384 $ 60,162 $ 44,530 Adjustments to Reconcile Net Income to Net Cash: Share-based compensation 843 887 778 Distributions in excess of (equity in undistributed) income of subsidiaries (31,087 ) (14,579 ) 12,668 Gain on sale of insurance subsidiary (8,265 ) Gain on cancellation of subordinated debentures (1,250 ) Net Change in: Other assets (441 ) 2,425 (1,354 ) Other liabilities (1,486 ) 1,466 (8,438 ) Investment in subsidiaries - operating activities 197 (4,517 ) 12,991 Net cash provided by operating activities 23,895 45,844 61,175 Cash Flow From Investing Activities: Net cash paid in acquisition (14,500 ) (12,832 ) Proceeds from business divestitures 16,000 Other 575 240 Net cash provided (used) in investing activities 2,075 (12,832 ) 240 Cash Flow From Financing Activities: Cash dividends (15,654 ) (10,694 ) (7,992 ) Repayment of borrowings (3,750 ) (55,000 ) Proceeds from issuance of long-term debt 70,000 Preferred stock redemption under small business lending fund (90,783 ) Stock issued under employee benefit plans 460 478 479 Stock issued under dividend reinvestment and stock purchase plan 661 523 325 Stock options exercised 1,531 564 115 Stock redeemed (1,640 ) (1,067 ) (491 ) Net cash used by financing activities (18,392 ) (10,196 ) (83,347 ) Cash, beginning of the year 36,044 13,228 35,160 Cash, end of year $ 43,622 $ 36,044 $ 13,228

Accounting Matters

Accounting Matters	12 Months Ended
	Dec. 31, 2015
Accounting Changes and Error Corrections [Abstract]
Accounting Matters	ACCOUNTING MATTERS FASB Accounting Standards Updates No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): recognition and Measurement of Financial Assets and Financial Liabilities The FASB has issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance 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. The new guidance permits early adoption of the own credit provision. In addition, the new guidance permits early adoption of the provision that exempts private companies and not-for-profit organizations from having to disclose fair value information about financial instruments measured at amortized cost. Adoption of the ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB ACCOUNTING STANDARDS Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. The FASB has issued Accounting Standards Update (ASU) No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. To simplify the accounting for adjustments made to provisional amounts recognized in a business combination, the amendments eliminate the requirement to retrospectively account for those adjustments. U.S. GAAP currently requires that during the measurement period, the acquirer retrospectively adjust the provisional amounts recognized at the acquisition date with a corresponding adjustment to goodwill. Those adjustments are required when new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts initially recognized or would have resulted in the recognition of additional assets or liabilities. The acquirer also must revise comparative information for prior periods presented in financial statements as needed, including revising depreciation, amortization, or other income effects as a result of changes made to provisional amounts. The amendments require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. Adoption of the ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. The only disclosures required at transition should be the nature of and reason for the change in accounting principle. An entity should disclose that information in the first annual period of adoption and in the interim periods within the first annual period if there is a measurement-period adjustment during the first annual period in which the changes are effective. FASB Accounting Standards Update No. 2015-15, Interest-Imputation of Interest (Subtopic 835-30), Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. The FASB has issued Accounting Standards Update (ASU) No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting. This ASU adds SEC paragraphs pursuant to the SEC Staff Announcement at the June 18, 2015, Emerging Issues Task Force meeting about the presentation and subsequent measurement of debt issuance costs associated with line-of-credit arrangements. In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, which requires the presentation of debt issuance costs related to a recognized debt liability as a direct deduction from the carrying amount of that debt liability. ASU 2015-03 does not address presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. Given the absence of authoritative guidance within ASU 2015-03 for debt issuance costs related to line-of-credit arrangements, the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. This ASU was effective upon issuance (August 18, 2015) and adoption did not have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2015-03 , Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs The FASB has issued Accounting Standards Update (ASU) No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. The amendments should be applied on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. These disclosures include the nature of and reason for the change in accounting principle, the transition method, a description of the prior-period information that has been retrospectively adjusted, and the effect of the change on the financial statement line items (i.e., debt issuance cost asset and the debt liability). For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. Adoption of the ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2015-01, Eliminating the Concept of Extraordinary Items The FASB has issued Accounting Standards Update (ASU) No. 2015-01 , Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The FASB issued this ASU as part of its initiative to reduce complexity in accounting standards. The objective of the simplification initiative is to identify, evaluate, and improve areas of U.S. GAAP for which cost and complexity can be reduced while maintaining or improving the usefulness of the information provided to the users of financial statements. This ASU eliminates from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, required that an entity separately classify, present, and disclose extraordinary events and transactions. Presently, an event or transaction is presumed to be an ordinary and usual activity of the reporting entity unless evidence clearly supports its classification as an extraordinary item. If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. The entity also is required to disclose applicable income taxes and either present or disclose earnings-per-share data applicable to the extraordinary item. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Adoption of the ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements.

General Litigation

General Litigation	12 Months Ended
	Dec. 31, 2015
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, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS 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. At the February 9, 2016 trading price of the shares, this amount would represent approximately 1.7% of the number of shares outstanding. 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.

Nature of Operations and Summ38

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
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 other-than-temporary impairment (“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 a decline exists that is other-than-temporary, involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time. When the Corporation does not intend to sell a debt security, and it is more likely than not, the Corporation will not have to sell the security before recovery of its cost basis, it recognizes the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. 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. 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 is 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.
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 and substantially delinquent loans may be considered to be impaired. 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. In applying the provisions of ASC 310, the Corporation considers its investment 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, except for installment loans with add-on interest, for which a method that approximates the level yield method is used. The accrual of interest on impaired loans is discontinued when, in management’s opinion, the borrower may be unable to meet payments as they become due. When 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 present value of estimated future cash flows using the loan’s existing rate, or the fair value of collateral if the loan is collateral dependent. 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 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 aggregated into pools of loans with common risk characteristics 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 expected cash flows of the acquired loans in excess of the fair values recorded is referred to as the accretable yield and is recognized in interest income over the remaining estimated lives of the loans. The Corporation will continually evaluate the fair value of the loans including cash flows expected to be collected.
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 conservative 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 a regional geographic, industry and customer level, 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 specifically identified loans, 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. Larger commercial loans 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 present value of expected future cash flows discounted at the loan’s effective interest rate or fair value of the underlying collateral. The Corporation evaluates the collectability of both principal and interest 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 21. 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 Reserve and Federal Home Loan Bank Stock	FEDERAL RESERVE AND FEDERAL HOME LOAN BANK STOCK are required investments for institutions that are members of the Federal Reserve Bank (“FRB”) and Federal Home Loan Bank systems. The required investment in the common stock is based on a predetermined formula based on the level of borrowings and other factors. These investments are 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 net income or expense from foreclosed assets. 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 other comprehensive income (“OCI”) 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 OCI to the extent the hedge is effective. The gains and losses on derivative instruments that are reported in OCI 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 currently in the consolidated statements of operations. 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 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 tax years still subject to examination by taxing authorities are years subsequent to 2011 .
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, 2015
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, 2014 and 2013 as if the Ameriana, Community and CFS 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 2013 Total revenue (net interest income plus other income) $ 291,614 $ 284,890 $ 253,668 Net income $ 60,497 $ 64,174 $ 39,979 Net income available to common shareholders $ 60,497 $ 64,174 $ 37,559 Earnings per share: Basic $ 1.49 $ 1.58 $ 0.98 Diluted $ 1.48 $ 1.57 $ 0.97
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Schedule of Preliminary Valuations of the Fair Value of Assets Acquired and Liabilities Assumed	Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the Ameriana acquisition is detailed in the following table. Prior to the end of the one year measurement period for finalizing the purchase price allocation, if information becomes available which would indicate adjustments are required to the purchase price allocation, such adjustments will be included in the purchase price allocation retrospectively. Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 60,365 Loans 319,664 Premises and equipment 14,491 Federal Home Loan Bank stock 2,693 Other real estate owned 5,719 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 7,086 Deposits (382,547 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,938 ) Subordinated Debentures (5,961 ) Other liabilities (9,451 ) Net tangible assets acquired 29,449 Core deposit intangible 3,200 Goodwill 37,753 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	Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change, the purchase price for the C Financial acquisition is detailed in the following table. Prior to the end of the one year measurement period for finalizing the purchase price allocation, if information becomes available which would indicate adjustments are required to the purchase price allocation, such adjustments will be included in the purchase price allocation retrospectively. 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
Merger with CFS Bancorp, Inc.
Business Acquisition [Line Items]
Schedule of Preliminary Valuations of the Fair Value of Assets Acquired and Liabilities Assumed	The purchase price for the CFS acquisition was allocated as follows: Fair Value Cash and cash equivalents $ 10,992 Interest-bearing time deposits 213,379 Investment securities available for sale 15,913 Investment securities held to maturity 14,372 Mortgage loans held for sale 189 Loans 603,114 Premises and equipment 19,643 Federal Home Loan Bank stock 6,188 Interest receivable 1,770 Cash surrender value of life insurance 36,555 Other real estate owned 12,857 Tax asset, deferred and receivable 30,717 Other assets 111,656 Deposits (955,432 ) Securities sold under repurchase agreements (9,830 ) Federal Home Loan Bank advances (15,000 ) Interest payable (294 ) Other liabilities (16,033 ) Net tangible assets acquired $ 80,756 Core deposit intangible 7,313 Goodwill 47,573 Purchase price $ 135,642

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2015
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, 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 Available for sale at December 31, 2014 U.S. Government-sponsored agency securities $ 100 $ 9 $ 109 State and municipal 216,915 11,801 $ 123 228,593 U.S. Government-sponsored mortgage-backed securities 310,460 8,771 127 319,104 Corporate obligations 31 31 Equity securities 1,706 1,706 Total available for sale 529,212 20,581 250 549,543 Held to maturity at December 31, 2014 State and municipal 204,443 5,716 96 210,063 U.S. Government-sponsored mortgage-backed securities 426,645 11,527 512 437,660 Total held to maturity 631,088 17,243 608 647,723 Total Investment Securities $ 1,160,300 $ 37,824 $ 858 $ 1,197,266
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 2015 2014 Credit losses on debt securities held: Balance, January 1 $ 500 $ 11,355 Reductions for previous other-than-temporary losses realized on securities sold during the year (500 ) $ (10,855 ) Balance, December 31 $ — $ 500
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, 2015 and 2014 : Less than 12 Months 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 Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2014 State and municipal $ 1,256 $ 7 $ 9,850 $ 116 $ 11,106 $ 123 U.S. Government-sponsored mortgage-backed securities 2,186 13 5,447 114 7,633 127 Total Temporarily Impaired Available for Sale Securities 3,442 20 15,297 230 18,739 250 Temporarily Impaired Held to Maturity Securities at December 31, 2014 State and municipal 5,119 96 250 5,369 96 U.S. Government-sponsored mortgage-backed securities 9,791 82 38,491 430 48,282 512 Total Temporarily Impaired Held to Maturity Securities 14,910 178 38,741 430 53,651 608 Total Temporarily Impaired Investment Securities $ 18,352 $ 198 $ 54,038 $ 660 $ 72,390 $ 858
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, 2015 Due in one year or less $ 4,658 $ 4,704 $ 4,144 $ 4,148 Due after one through five years 13,725 14,295 28,054 29,175 Due after five through ten years 52,878 55,375 81,483 83,646 Due after ten years 220,600 231,672 106,086 109,765 291,861 306,046 219,767 226,734 U.S. Government-sponsored mortgage-backed securities 342,550 346,266 398,832 405,646 Equity securities 3,912 3,912 Certificates of deposit 2,176 2,176 Total Investment Securities $ 640,499 $ 658,400 $ 618,599 $ 632,380

Loans and Allowance (Tables)

Loans and Allowance (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 December 31, 2014 Commercial and industrial loans $ 1,057,075 $ 896,688 Agricultural production financing and other loans to farmers 97,711 104,927 Real estate loans: Construction 366,704 207,221 Commercial and farmland 1,802,921 1,672,661 Residential 786,105 647,315 Home equity 348,613 286,529 Individuals' loans for household and other personal expenditures 74,717 73,400 Lease financing receivables, net of unearned income 588 1,106 Other commercial loans 159,388 35,018 Loans 4,693,822 3,924,865 Allowance for loan losses (62,453 ) (63,964 ) Net Loans $ 4,631,369 $ 3,860,901
Changes in Allowance for Loan Losses	The following table summarizes changes in the allowance for loan losses by loan segment for the twelve months ended December 31, 2015, 2014 and 2013: Twelve Months Ended December 31, 2015 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, January 1 $ 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, January 1 $ 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 Twelve Months Ended December 31, 2013 Commercial Commercial Real Estate Consumer Residential Finance Total Allowance for loan losses: Balances, January 1 $ 25,913 $ 26,703 $ 2,593 $ 14,157 $ 69,366 Provision for losses 2,794 340 (11 ) 3,514 $ 11 6,648 Recoveries on loans 4,586 3,552 556 1,292 4 9,990 Loans charged off (6,117 ) (7,493 ) (623 ) (3,886 ) (15 ) (18,134 ) Balances, December 31, 2013 $ 27,176 $ 23,102 $ 2,515 $ 15,077 $ 67,870
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, 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 December 31, 2014 Commercial Commercial Consumer Residential Finance Total Allowance balances: Individually evaluated for impairment $ 1,455 $ 470 $ 194 $ 2,119 Collectively evaluated for impairment 27,369 18,207 $ 2,658 12,958 $ 3 61,195 Loans acquired with deteriorated credit quality 650 650 Total Allowance for Loan Losses $ 28,824 $ 19,327 $ 2,658 $ 13,152 $ 3 $ 63,964 Loan balances: Individually evaluated for impairment $ 16,108 $ 23,963 $ 4,022 $ 44,093 Collectively evaluated for impairment 1,011,122 1,796,797 $ 73,400 925,282 $ 1,106 3,807,707 Loans acquired with deteriorated credit quality 9,403 59,122 4,540 73,065 Loans $ 1,036,633 $ 1,879,882 $ 73,400 $ 933,844 $ 1,106 $ 3,924,865
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, 2015 December 31, 2014 Commercial and industrial loans $ 4,634 $ 7,048 Agriculture production financing and other loans to farmers 827 5,800 Real estate loans: Construction 736 1,439 Commercial and farmland 11,277 19,350 Residential 11,818 12,933 Home equity 1,952 1,988 Individuals' loans for household and other personal expenditures 145 231 Total $ 31,389 $ 48,789
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, 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 December 31, 2013 Unpaid Principal Recorded Related Average Recorded Investment Interest Income Recognized Impaired loans with no related allowance: Commercial and industrial loans $ 35,066 $ 16,371 $ 19,209 $ 192 Agriculture production financing and other loans to farmers 32 30 32 Real estate loans: Construction 16,109 10,625 11,621 117 Commercial and farmland 128,073 83,033 84,057 1,663 Residential 6,746 3,910 4,236 75 Home equity 3,299 112 225 Other commercial loans 454 172 181 1 Total $ 189,779 $ 114,253 $ 119,561 $ 2,048 Impaired loans with related allowance: Commercial and industrial loans $ 1,390 $ 1,216 $ 683 $ 1,240 $ 9 Real estate loans: Commercial and farmland 4,657 4,215 894 4,291 9 Residential 74 71 6 76 Total $ 6,121 $ 5,502 $ 1,583 $ 5,607 $ 18 Total Impaired Loans $ 195,900 $ 119,755 $ 1,583 $ 125,168 $ 2,066
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, 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 December 31, 2014 Commercial Pass Commercial Special Mention Commercial Substandard Commercial Doubtful Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 823,732 $ 24,455 $ 48,226 $ 275 $ 896,688 Agriculture production financing and other loans to farmers 96,155 1,195 7,577 104,927 Real estate loans: Construction 185,394 3,164 2,928 $ 15,588 $ 147 207,221 Commercial and farmland 1,552,781 29,484 90,161 235 1,672,661 Residential 149,430 6,321 10,918 470,972 9,674 647,315 Home equity 6,368 12 690 277,571 1,888 286,529 Individuals' loans for household and other personal expenditures 73,165 235 73,400 Lease financing receivables, net of unearned income 998 108 1,106 Other commercial loans 35,018 35,018 Loans $ 2,849,876 $ 64,631 $ 160,608 $ 275 $ 837,296 $ 12,179 $ 3,924,865
Past Due Aging of Loan Portfolio by Loan Class	The following tables illustrate the past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated: 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 December 31, 2014 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 882,596 $ 4,006 $ 53 $ 2,985 $ 7,048 $ 14,092 $ 896,688 Agriculture production financing and other loans to farmers 98,236 891 5,800 6,691 104,927 Real estate loans: Construction 204,683 1,017 82 1,439 2,538 207,221 Commercial and farmland 1,642,016 9,846 778 $ 671 19,350 30,645 1,672,661 Residential 626,821 4,876 1,831 854 12,933 20,494 647,315 Home equity 282,828 1,213 352 148 1,988 3,701 286,529 Individuals' loans for household and other personal expenditures 72,853 258 53 5 231 547 73,400 Lease financing receivables, net of unearned income 1,106 1,106 Other commercial loans 35,018 35,018 Loans $ 3,846,157 $ 22,107 $ 3,149 $ 4,663 $ 48,789 $ 78,708 $ 3,924,865
Schedules of Troubled Debt Restructuring	The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2015 and 2014 , 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, 2015 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 21 Total 1 $ 21 Twelve Months Ended December 31, 2014 Number of Loans Recorded Balance Real estate loans: Residential 1 $ 70 Total 1 $ 70 The following tables summarize troubled debt restructurings that occurred during the periods ended December 31, 2015 and 2014 : 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 December 31, 2014 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 259 $ 259 1 Residential 632 622 9 Home equity 320 350 11 Individuals' loans for household and other personal expenditures 26 26 2 Total $ 1,237 $ 1,257 23 The following tables show the recorded investment of troubled debt restructurings, by modification type, that occurred during the years indicated: 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 December 31, 2014 Term Rate Combination Total Real estate loans: Commercial and farmland $ 288 $ 288 Residential 31 $ 218 $ 360 609 Home equity 100 243 343 Individuals' loans for household and other personal expenditures 23 23 Total $ 319 $ 318 $ 626 $ 1,263

Accounting for Certain Loans 42

Accounting for Certain Loans Acquired in a Purchase (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Schedule of Outstanding Balance and Carrying Amount of Acquired Loans	The following table includes the outstanding balance and carrying amount of all the performing and non-performing acquired loans, which are included in the Corporation's balance sheet at December 31, 2015 and 2014. 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 table below. Twelve Months Ended December 31, 2015 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,122 $ 2,400 $ 868 $ 5,390 Additions $ 2,848 $ 145 2,993 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 $ 2,848 $ 114 $ 1,508 $ 1,188 $ 642 $ 6,300 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 Twelve Months Ended December 31, 2013 CFS SCB Total Beginning balance $ 1,715 $ 1,715 Additions $ 3,502 3,502 Accretion (10 ) (463 ) (473 ) Reclassification from nonaccretable 672 177 849 Disposals (41 ) (41 ) Ending balance $ 4,164 $ 1,388 $ 5,552
Schedule of Loans Acquired for which Contractually Required Payments would not be Collected	The following table presents loans acquired during the periods ending December 31, 2015 and 2014, for which it was probable at acquisition that all contractually required payments would not be collected: 2015 2014 Ameriana C Financial Total Community Contractually required payments receivable at acquisition date $ 29,093 $ 2,632 $ 31,725 $ 26,032 Nonaccretable difference 13,728 637 14,365 3,498 Expected cash flows at acquisition date 15,365 1,995 17,360 22,534 Accretable difference 2,848 145 2,993 2,234 Basis in loans at acquisition date $ 12,517 $ 1,850 $ 14,367 $ 20,300

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	The following table summarizes the Corporation's premises and equipment as of December 31, 2015 and 2014 : 2015 2014 Cost at December 31: Land $ 26,510 $ 19,373 Buildings and Leasehold Improvements 115,461 99,451 Equipment 64,892 56,606 Total Cost 206,863 175,430 Accumulated Depreciation and Amortization (109,215 ) (97,739 ) Net $ 97,648 $ 77,691
Schedule of Future Minimum Rental Payments for Operating Leases	The future minimum rental commitments required under the operating leases in effect at December 31, 2015 , expiring at various dates through the year 2035 are as follows for the years ending December 31: Future Minimum Rental Commitments 2016 $ 3,076 2017 2,353 2018 1,419 2019 1,222 2020 1,060 After 2020 6,629 Total Future Minimum Obligations $ 15,759

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill Disclosure [Abstract]
Schedule of Goodwill	2015 2014 Balance, January 1 $ 202,724 $ 188,948 Goodwill acquired 48,879 13,776 Goodwill reduction $ (8,474 ) Balance, December 31 $ 243,129 $ 202,724

Core Deposit and Other Intang45

Core Deposit and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Schedule of Core Deposit and Other Intangibles	The carrying basis and accumulated amortization of recognized core deposit and other intangibles are noted below. 2015 2014 Gross carrying amount $ 58,360 $ 53,702 Core deposit intangible and other intangibles acquired 4,181 4,658 Accumulated amortization (45,164 ) (42,329 ) Core deposit intangible and other intangibles reduction (742 ) Core Deposit and Other Intangibles $ 16,635 $ 16,031
Schedule of Estimated Future Amortization Expense	Estimated future amortization expense is summarized as follows: Amortization Expense 2016 $ 3,055 2017 3,017 2018 1,904 2019 1,676 2020 1,618 After 2020 5,365 Total Future Minimum Obligations $ 16,635

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 December 31, 2014 Demand deposits $ 2,576,283 $ 2,146,492 Savings deposits 1,518,722 1,376,707 Certificates and other time deposits of $100,000 or more 323,698 260,685 Other certificates and time deposits 556,476 523,010 Brokered deposits 314,468 333,800 Total deposits $ 5,289,647 $ 4,640,694
Summary of Contractual Maturities of Time Deposits	At December 31, 2015, the contractual maturities of time deposits are summarized as follows: Certificates and Other Time Deposits 2016 $ 600,551 2017 272,652 2018 126,929 2019 74,750 2020 55,187 After 2020 64,573 $ 1,194,642

Transfers Accounted for as Se47

Transfers Accounted for as Secured Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 were: 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, 2015
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the Corporation's borrowings as of December 31, 2015 and 2014: December 31, 2015 December 31, 2014 Federal funds purchased $ 49,721 $ 15,381 Securities sold under repurchase agreements 155,325 124,539 Federal Home Loan Bank advances 235,652 145,264 Subordinated debentures and term loans 127,846 126,810 Total Borrowings $ 568,544 $ 411,994
Schedule of Maturities of Long-term Debt	Maturities of borrowings as of December 31, 2015 , are as follows: Maturities in Years Ending December 31: Federal Funds Purchased Securities Sold Federal Home Subordinated 2016 $ 49,721 $ 155,325 $ 91,441 $ 183 2017 37,222 2018 26,851 2019 13,828 2020 31,310 After 2020 35,000 132,012 ASC 805 fair value adjustments at acquisition (4,349 ) $ 49,721 $ 155,325 $ 235,652 $ 127,846

Derivative Instruments and He49

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and December 31, 2014 . Asset Derivatives Liability Derivatives December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 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 $ 36 Other Assets $ 137 Other Liabilities $ 2,921 Other Liabilities $ 2,650 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 4,938 Other Assets $ 3,730 Other Liabilities $ 5,149 Other Liabilities $ 3,887
Effect of Derivative Financial 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, 2015 , 2014 and 2013 . Derivatives Not Location of Gain Amount of Gain (Loss) Amount of Gain (Loss) Amount of Gain (Loss) Interest rate contracts Other income $ (53 ) $ (73 ) $ 247 Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative Location of Loss Reclassified from Accumulated Other Comprehensive Income (Effective Portion) Amount of Loss Reclassified from Other Comprehensive Income into Income 2015 2014 2015 2014 2013 Interest rate products $ (1,681 ) $ (3,996 ) Interest expense $ (1,427 ) $ (1,411 ) $ (935 )

Fair Values of Financial Inst50

Fair Values of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 . 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 Fair Value Measurements Using: Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Available for sale securities: U.S. Government-sponsored agency securities $ 109 $ 109 State and municipal 228,593 221,982 $ 6,611 U.S. Government-sponsored mortgage-backed securities 319,104 319,104 Corporate obligations 31 31 Equity securities 1,706 1,702 4 Interest rate swap asset 3,730 3,730 Interest rate cap 137 137 Interest rate swap liability 6,537 6,537
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, 2015 and 2014 . Available for Sale Securities For The Year Ended December 31, 2015 December 31, 2014 Beginning Balance $ 6,646 $ 9,977 Included in other comprehensive income 199 3,656 Principal payments (913 ) (6,987 ) Ending balance $ 5,932 $ 6,646
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, 2015 and 2014 . 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 Fair Value Measurements Using Quoted Prices in Active Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Impaired Loans (collateral dependent) $ 17,134 $ 17,134 Other real estate owned $ 5,155 $ 5,155
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, 2015 and 2014 . 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%) December 31, 2014 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 6,611 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) $ 17,134 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 50% (3%) Other real estate owned $ 5,155 Appraisals Discount to reflect current market conditions 0% - 20% (7%)
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, 2015 and 2014 . 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 2014 Carrying Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets at December 31: Cash and cash equivalents $ 118,616 $ 118,616 Interest-bearing time deposits 47,520 47,520 Investment securities available for sale 549,543 $ 542,897 $ 6,646 Investment securities held to maturity 631,088 614,457 33,266 Loans held for sale 7,235 7,235 Loans 3,860,901 3,810,912 Federal Reserve and Federal Home Loan Bank stock 41,353 41,353 Interest rate swap asset 3,867 3,867 Interest receivable 19,984 19,984 Liabilities at December 31: Deposits $ 4,640,694 $ 3,532,199 $ 1,099,610 Borrowings: Federal funds purchased 15,381 15,381 Securities sold under repurchase agreements 124,539 124,539 Federal Home Loan Bank advances 145,264 146,669 Subordinated debentures and term loans 126,810 92,802 Interest rate swap liability 6,537 6,537 Interest payable 3,201 3,201

Commitments and Contingent Li51

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
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: 2015 2014 Amounts of commitments: Loan commitments to extend credit $ 1,547,048 $ 1,617,552 Standby letters of credit $ 46,734 $ 52,655

Accumulated Other Comprehensi52

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Securities Available for Sale for which a Portion of Other-Than-Temporary Impairment has been Recognized in Income Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total 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 ) Balance at December 31, 2013 $ 1,566 $ (1,847 ) $ (501 ) $ (5,628 ) $ (6,410 ) Other comprehensive income before reclassifications 14,860 1,847 (2,599 ) (7,580 ) 6,528 Amounts reclassified from accumulated other comprehensive income (2,328 ) 918 (338 ) (1,748 ) Period change 12,532 1,847 (1,681 ) (7,918 ) 4,780 Balance at December 31, 2014 $ 14,098 $ — $ (2,182 ) $ (13,546 ) $ (1,630 )
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 twelve months ended December 31, 2015 , 2014 and 2013 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Year Ended December 31, Details about Accumulated Other Comprehensive Income (Loss) Components 2015 2014 2013 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 2,670 $ 3,581 $ 487 Other income - net realized gains on sales of available for sale securities Related income tax expense (934 ) (1,253 ) (170 ) Income tax expense $ 1,736 $ 2,328 $ 317 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (1,427 ) $ (1,411 ) $ (935 ) Interest expense - subordinated debentures and term loans Related income tax benefit 499 493 327 Income tax expense $ (928 ) $ (918 ) $ (608 ) Unrealized gains (losses) on defined benefit plans Amortization of net loss and prior service costs $ 305 $ 520 $ (1,765 ) Other expenses - salaries and employee benefits Related income tax benefit (expense) (107 ) (182 ) 618 Income tax expense $ 198 $ 338 $ (1,147 ) Total reclassifications for the period, net of tax $ 1,006 $ 1,748 (1,438 ) (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 (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and December 31, 2014 were as follows: 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 % Prompt Corrective Action Thresholds Actual Adequately Capitalized Well Capitalized December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital to risk-weighted assets First Merchants Corporation $ 685,507 15.34 % $ 357,581 8.00 % N/A N/A First Merchants Bank 653,169 14.64 356,884 8.00 $ 446,105 10.00 % Tier 1 capital to risk weighted assets First Merchants Corporation $ 564,535 12.63 % $ 178,791 4.00 % N/A N/A First Merchants Bank 597,305 13.39 178,442 4.00 $ 267,663 6.00 % Tier 1 capital to average assets First Merchants Corporation $ 564,535 10.15 % $ 222,533 4.00 % N/A N/A First Merchants Bank 597,305 10.56 226,339 4.00 $ 282,953 5.00 %

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Assumptions Used in Black Scholes Model	The following summarizes the assumptions used in the Black-Scholes model for those options granted in 2014 and 2013: 2014 2013 Risk-free interest rate 2.41 % 1.25 % Expected price volatility 45.05 % 45.68 % Dividend yield 2.73 % 2.96 % Forfeiture rate 5.46 % 4.73 % Weighted-average expected life, until exercise 7.74 years 7.27 years
Components of Share Based Compensation Awards	The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense: Year Ended Year Ended Year Ended 2015 2014 2013 Stock and ESPP Options Pre-tax compensation expense $ 101 $ 237 $ 253 Income tax expense (benefit) 4 (47 ) (16 ) Stock and ESPP option expense, net of income taxes $ 105 $ 190 $ 237 Restricted Stock Awards Pre-tax compensation expense $ 2,169 $ 1,940 $ 1,520 Income tax benefit (749 ) (679 ) (531 ) Restricted stock awards expense, net of income taxes $ 1,420 $ 1,261 $ 989 Total Share-Based Compensation: Pre-tax compensation expense $ 2,270 $ 2,177 $ 1,773 Income tax benefit (745 ) (726 ) (547 ) Total share-based compensation expense, net of income taxes $ 1,525 $ 1,451 $ 1,226
Stock Option Activity Under Stock Option Plans	Stock option activity under the Corporation's stock option plans, as of December 31, 2015 , and changes during the year ended December 31, 2015 , were as follows: Number of Weighted-Average Weighted Average Aggregate Outstanding at January 1, 2015 737,931 $ 20.99 Exercised (96,066 ) $ 15.21 Canceled (199,853 ) $ 25.99 Outstanding December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319 Vested and Expected to Vest at December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319 Exercisable at December 31, 2015 442,012 $ 19.99 3.11 $ 2,599,319
Summary of Unvested RSAs Outstanding	The following table summarizes information on unvested RSAs outstanding as of December 31, 2015 : Number of Weighted-Average Unvested RSAs at January 1, 2015 385,450 $ 15.65 Granted 125,050 $ 23.48 Forfeited (6,419 ) $ 17.99 Vested (149,577 ) $ 11.88 Unvested RSAs at December 31, 2015 354,504 $ 19.65

Pension and Other Post Retire55

Pension and Other Post Retirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 . 2015 2014 Change in Benefit Obligation: Benefit obligation at beginning of year $ 80,650 $ 62,270 Service cost 55 73 Interest cost 3,087 3,235 Actuarial loss (gain) (5,617 ) 12,968 Benefits paid (6,428 ) (5,541 ) Net transfers in from CFS acquisition 7,645 Benefit obligation at end of year $ 71,747 $ 80,650 Change in Plan Assets: Fair value of plan assets at beginning of year $ 77,139 $ 69,871 Actual return on plan assets 153 5,232 Employer contributions 532 504 Benefits paid (6,428 ) (5,541 ) CFS acquisition 7,073 End of year 71,396 77,139 Funded status at end of year $ (351 ) $ (3,511 ) Assets and Liabilities Recognized in the Balance Sheets: Deferred tax asset $ 7,461 $ 8,541 Assets $ 4,006 $ 1,329 Liabilities $ 4,357 $ 4,840 Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost Consist of: Accumulated loss $ (13,857 ) $ (15,863 ) Prior service credit (305 ) (346 ) $ (14,162 ) $ (16,209 )
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, 2015 December 31, 2014 Projected benefit obligation $ 4,357 $ 4,840 Accumulated benefit obligation $ 4,357 $ 4,840 Fair value of plan assets
Schedule of Net Periodic Pension Costs	The following table shows the components of net periodic pension costs: December 31, 2015 December 31, 2014 December 31, 2013 Service cost $ 55 $ 73 $ 131 Interest cost 3,087 3,235 2,670 Expected return on plan assets (4,471 ) (4,467 ) (4,265 ) Amortization of prior service costs 64 81 25 Amortization of net loss 1,722 478 2,131 Net periodic pension (benefit) cost $ 457 $ (600 ) $ 692
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, 2015 December 31, 2014 December 31, 2013 Net periodic pension (benefit) cost $ 457 $ (600 ) $ 692 Net gain (loss) 1,299 (12,203 ) 11,942 Amortization of loss 1,722 478 2,131 Amortization of prior service cost 64 81 25 Total recognized in other comprehensive income (loss) 3,085 (11,644 ) 14,098 Total recognized in net periodic pension cost and other comprehensive income (loss) $ 2,628 $ (11,044 ) $ 13,406
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, 2015 December 31, 2014 December 31, 2013 Amortization of net loss $ (1,505 ) $ (1,770 ) $ (533 ) Amortization of prior service cost (61 ) (64 ) (25 ) Total $ (1,566 ) $ (1,834 ) $ (558 )
Schedule of Assumptions Used	Significant assumptions include: December 31, 2015 December 31, 2014 December 31, 2013 Weighted-average Assumptions Used to Determine Benefit Obligation: Discount rate 4.50 % 4.00 % 4.80 % Rate of compensation increase for accruing active participants 3.00 % 3.00 % 3.00 % Weighted-average Assumptions Used to Determine Cost: Discount rate 4.00 % 4.80 % 4.00 % Expected return on plan assets 6.00 % 6.00 % 7.00 % 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, 2015 . The minimum contribution required in 2016 will likely be zero but the Corporation may decide to make a discretionary contribution during the year. 2016 $ 4,814 2017 4,729 2018 4,657 2019 4,838 2020 4,772 After 2020 24,440 $ 48,250
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 $52,433,000 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 $18,963,000 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, 2015 and 2014 . Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs 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 Fair Value Measurements Using Quoted Prices in Significant Other Observable Inputs Significant December 31, 2014 Fair Value (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 2,032 $ 2,032 Corporate Bonds and Notes 9,384 9,384 Government Agency and Municipal Bonds and Notes 8,252 $ 8,252 Certificates of Deposit 1,001 1,001 Party-in-Interest Investments Common Stock 1,376 1,376 Common Bond Fund 4,615 4,615 Common Equity Fund 5,858 5,858 Mutual Funds Taxable Bond 4,987 4,987 Large Cap Equity 21,185 21,185 Mid Cap Equity 9,434 9,434 Small Cap Equity 3,872 3,872 International Equity 3,474 3,474 Specialty Alternative Equity 1,669 1,669 $ 77,139 $ 57,413 $ 19,726 Plan assets are re-balanced quarterly. At December 31, 2015 and 2014 , plan assets by category are as follows: December 31, 2015 December 31, 2014 Actual Target Actual Target Cash and cash equivalents 2.2 % 2.0 % 2.6 % 2.0 % Equity securities 58.1 60.0 58.7 60.0 Debt securities 37.4 36.0 36.5 36.0 Alternative investments 2.3 2.0 2.2 2.0 100.0 % 100.0 % 100.0 % 100.0 %

Income Tax (Tables)

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Reconciliation of Statutory and Actual Income Tax Expense (Benefit)	The reconciliation between the statutory and actual income tax expense (benefit) is summarized in the following table for the years indicated: 2015 2014 2013 Income Tax Expense for the Year Ended December 31: Currently Payable: Federal $ 21,221 $ 7,075 $ 13,737 State Deferred: Federal 3,952 14,538 2,147 State 492 510 Total Income Tax Expense $ 25,665 $ 22,123 $ 15,884 Reconciliation of Federal Statutory to Actual Tax Expense: Federal Statutory Income Tax at 35% $ 31,867 $ 28,800 $ 21,145 Tax-exempt Interest Income (7,083 ) (5,148 ) (3,923 ) Basis Difference on Sale of Insurance Subsidiary 2,252 Stock Compensation 34 36 50 Earnings on Life Insurance (1,012 ) (1,271 ) (905 ) Tax Credits (583 ) (911 ) (857 ) Other 190 617 374 Actual Tax Expense $ 25,665 $ 22,123 $ 15,884
Deferred Tax Assets and Liabilities	The tax effects of temporary differences related to deferred taxes shown on the balance sheets were: 2015 2014 Deferred Tax Asset at December 31: Assets: Differences in Accounting for Loan Losses $ 25,867 $ 26,665 Differences in Accounting for Loan Fees 762 747 Differences in Accounting for Loans and Securities 9,359 9,910 Deferred Compensation 5,100 5,234 Difference in Accounting for Pensions and Other Employee Benefits 2,247 1,084 Federal & State Income Tax Loss Carryforward and Credits 23,737 23,977 Other 9,310 8,535 Total Assets 76,382 76,152 Liabilities: Differences in Depreciation Methods 7,742 8,220 State Income Tax 591 591 Net Unrealized Gain on Securities Available for Sale 6,636 7,591 Gain on FDIC Modified Whole Bank Transaction 1,405 1,694 Other 717 1,096 Total Liabilities 17,091 19,192 Net Deferred Tax Asset Before Valuation Allowance 59,291 56,960 Valuation allowance: Beginning Balance (17,568 ) (17,171 ) Decrease/(Increase) During the Year 1,832 (397 ) Ending Balance (15,736 ) (17,568 ) Net Deferred Tax Asset $ 43,555 $ 39,392

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
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: 2015 2014 2013 Weighted-Average Shares Weighted-Average Shares Weighted-Average Shares Basic net income per share: $ 65,384 $ 60,162 $ 44,530 Preferred stock dividends (2,380 ) Net income available to common stockholders 65,384 37,816,399 $ 1.73 60,162 36,266,356 $ 1.66 42,150 29,731,420 $ 1.42 Effect of dilutive stock options and warrants 271,834 288,253 276,960 Diluted net income per share: Net income available to common stockholders $ 65,384 38,088,233 $ 1.72 $ 60,162 36,554,609 $ 1.65 $ 42,150 30,008,380 $ 1.41

Quarterly Results of Operatio58

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : 2015 2014 First Second Third Fourth First Second Third Fourth Interest income $ 52,944 $ 55,202 $ 56,538 $ 56,514 $ 51,009 $ 51,527 $ 53,290 $ 53,053 Interest expense 5,968 6,171 6,215 6,440 5,117 5,408 5,424 5,893 Net interest income 46,976 49,031 50,323 50,074 45,892 46,119 47,866 47,160 Provision for loan losses 417 1,600 960 Net interest income after provision for loan losses 46,976 48,614 50,323 50,074 45,892 46,119 46,266 46,200 Non-interest income 16,232 24,633 16,899 14,767 15,434 16,179 18,412 16,375 Non-interest expense 41,202 46,423 43,598 46,246 43,089 41,250 42,576 41,677 Income before income tax expense 22,006 26,824 23,624 18,595 18,237 21,048 22,102 20,898 Income tax expense 5,834 8,856 6,557 4,418 4,617 5,888 5,980 5,638 Net income available to common stockholders $ 16,172 $ 17,968 $ 17,067 $ 14,177 $ 13,620 $ 15,160 $ 16,122 $ 15,260 Basic EPS $ 0.43 $ 0.47 $ 0.46 $ 0.37 $ 0.38 $ 0.42 $ 0.45 $ 0.41 Diluted EPS $ 0.43 $ 0.47 $ 0.45 $ 0.37 $ 0.38 $ 0.41 $ 0.45 $ 0.41 Average Shares Outstanding: Basic 37,709,883 37,793,448 37,850,827 37,908,873 35,956,436 36,026,763 36,054,867 37,018,014 Diluted 38,000,074 38,043,359 38,118,199 38,190,694 36,260,624 36,294,149 36,328,981 37,323,276

Condensed Financial Informati59

Condensed Financial Information (parent company only) (Tables)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Parent Company Information, Condensed Balance Sheets	Condensed Balance Sheets December 31, 2015 December 31, 2014 Assets Cash $ 43,622 $ 36,044 Investment in subsidiaries 932,372 820,123 Goodwill 448 448 Other assets 9,668 6,281 Total assets $ 986,110 $ 862,896 Liabilities Borrowings $ 127,663 $ 126,702 Other liabilities 7,938 9,367 Total liabilities 135,601 136,069 Stockholders' equity 850,509 726,827 Total liabilities and stockholders' equity $ 986,110 $ 862,896
Schedule of Parent Company Information, Condensed Statements of Income and Comprehensive Income	Condensed Statements of Income and Comprehensive Income December 31, 2015 December 31, 2014 December 31, 2013 Income Dividends from subsidiaries $ 39,032 $ 53,231 $ 63,732 Gain on the sale of insurance subsidiary 8,265 Gain on cancellation of subordinated debentures 1,250 Other income 197 538 45 Total income 48,744 53,769 63,777 Expenses Interest expense 6,661 6,616 3,531 Salaries and employee benefits 3,023 3,128 3,284 Net occupancy and equipment expenses 464 442 258 Other outside services 1,455 458 1,141 Professional services 636 409 648 Other expenses 1,234 1,132 870 Total expenses 13,473 12,185 9,732 Income before income tax benefit (expense) and equity in undistributed income of subsidiaries 35,271 41,584 54,045 Income tax benefit (expense) (974 ) 3,999 3,153 Income before equity in undistributed income of subsidiaries 34,297 45,583 57,198 Equity in undistributed (distributions in excess of) income of subsidiaries 31,087 14,579 (12,668 ) Net income 65,384 60,162 44,530 Preferred stock dividends and discount accretion (2,380 ) Net income available to common stockholders $ 65,384 $ 60,162 $ 42,150 Net income $ 65,384 $ 60,162 $ 44,530 Other comprehensive income (loss) 268 4,780 (911 ) Comprehensive income $ 65,652 $ 64,942 $ 43,619
Schedule of Parent Company Information, Condensed Statement of Cash Flows	Condensed Statement of Cash Flows Year Ended December 31, 2015 2014 2013 Cash Flow From Operating Activities: Net income $ 65,384 $ 60,162 $ 44,530 Adjustments to Reconcile Net Income to Net Cash: Share-based compensation 843 887 778 Distributions in excess of (equity in undistributed) income of subsidiaries (31,087 ) (14,579 ) 12,668 Gain on sale of insurance subsidiary (8,265 ) Gain on cancellation of subordinated debentures (1,250 ) Net Change in: Other assets (441 ) 2,425 (1,354 ) Other liabilities (1,486 ) 1,466 (8,438 ) Investment in subsidiaries - operating activities 197 (4,517 ) 12,991 Net cash provided by operating activities 23,895 45,844 61,175 Cash Flow From Investing Activities: Net cash paid in acquisition (14,500 ) (12,832 ) Proceeds from business divestitures 16,000 Other 575 240 Net cash provided (used) in investing activities 2,075 (12,832 ) 240 Cash Flow From Financing Activities: Cash dividends (15,654 ) (10,694 ) (7,992 ) Repayment of borrowings (3,750 ) (55,000 ) Proceeds from issuance of long-term debt 70,000 Preferred stock redemption under small business lending fund (90,783 ) Stock issued under employee benefit plans 460 478 479 Stock issued under dividend reinvestment and stock purchase plan 661 523 325 Stock options exercised 1,531 564 115 Stock redeemed (1,640 ) (1,067 ) (491 ) Net cash used by financing activities (18,392 ) (10,196 ) (83,347 ) Cash, beginning of the year 36,044 13,228 35,160 Cash, end of year $ 43,622 $ 36,044 $ 13,228

Nature of Operations and Summ60

Nature of Operations and Summary of Significant Accounting Policies - Allowance for Loan Losses (Details)	12 Months Ended
	Dec. 31, 2015key_element
Accounting Policies [Abstract]
Number of key element used in assessing the appropriateness of the allowance for loan losses	3

Nature of Operations and Summ61

Nature of Operations and Summary of Significant Accounting Policies - Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2015
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 Summ62

Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2015
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 Summ63

Nature of Operations and Summary of Significant Accounting Policies - Requisite Service Period, Stock Award Plans (Details)	12 Months Ended
	Dec. 31, 2015
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 - Narrative (Details) $ / shares in Units, $ in Thousands	Dec. 31, 2015USD ($)bankshares	Apr. 17, 2015USD ($)bank$ / shares	Nov. 07, 2014USD ($)bank$ / sharesshares	Nov. 12, 2013USD ($)bankshares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares
Business Acquisition [Line Items]
Value of stock issued as a part of acquisition					$ 70,402	$ 34,981	$ 135,642
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	7,079,457
Value of stock issued as a part of acquisition					$ 346	$ 197	$ 885
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%				100.00%
Number of banking centers acquired | bank	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	$ 3,200				$ 3,200
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		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			10
Number of shares of common stock			4.0926
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
Merger with CFS Bancorp, Inc.
Business Acquisition [Line Items]
Percentage of interest acquired				100.00%
Number of banking centers acquired | bank				20
Stock issued as a part of acquisition (in shares) | shares				7,100,000
Value of stock issued as a part of acquisition				$ 135,600
Core deposit intangible				$ 7,313
Acquired intangible asset, expected useful life				10 years
Total purchase price				$ 135,642
Percentage of common stock received per shares owned through acquisition				0.65%
Pro forma nonrecurring expense							9,500
Pro forma revenue							$ 4,900

Acquisitions and Divestitures65

Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014	Nov. 07, 2014	Dec. 31, 2013	Nov. 12, 2013
Business Acquisition [Line Items]
Loans	$ 430,289
Goodwill	243,129		$ 202,724		$ 188,948
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Cash and cash equivalents	4,068
Interest-bearing time deposits	8,790
Investment securities	60,365
Loans	319,664
Premises and equipment	14,491
Federal Home Loan Bank stock	2,693
Other real estate owned	5,719
Interest receivable	1,306
Cash surrender value of life insurance	28,188
Other assets	7,086
Deposits	(382,547)
Interest payable	(24)
Federal Home Loan Bank advances	(24,938)
Subordinated Debentures	(5,961)
Other liabilities	(9,451)
Net tangible assets acquired	29,449
Core deposit intangible	3,200
Goodwill	37,753
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	$ (11,597)	(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				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
Merger with CFS Bancorp, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents						$ 10,992
Interest-bearing time deposits						213,379
Investment securities						15,913
Investment securities held to maturity						14,372
Mortgage loans held for sale						189
Loans						603,114
Premises and equipment						19,643
Federal Home Loan Bank stock						6,188
Other real estate owned						12,857
Interest receivable						1,770
Cash surrender value of life insurance						36,555
Tax asset, deferred and receivable						30,717
Other assets						111,656
Deposits						(955,432)
Securities sold under repurchase agreements						(9,830)
Interest payable						(294)
Federal Home Loan Bank advances						(15,000)
Other liabilities						(16,033)
Net tangible assets acquired						80,756
Core deposit intangible						7,313
Goodwill						47,573
Purchase price						$ 135,642

Acquisitions and Divestitures66

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 Divestitures67

Acquisitions and Divestitures - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Total revenue (net interest income plus other income)	$ 291,614	$ 284,890	$ 253,668
Net income	60,497	64,174	39,979
Net income available to common shareholders	$ 60,497	$ 64,174	$ 37,559
Earnings per share:
Basic (in dollars per share)	$ 1.49	$ 1.58	$ 0.98
Diluted (in dollars per share)	$ 1.48	$ 1.57	$ 0.97

Restriction on Cash and Due F68

Restriction on Cash and Due From Banks (Details) $ in Thousands	Dec. 31, 2015USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Cash balance, Federal Home Loan Bank And Federal Reserve Bank	$ 14,546
Cash reserve with Federal Reserve Bank	19,288
Interest-bearing Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Cash amount that exceeded federally insured limits	$ 63,132

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Approximate Fair Values of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Total available for sale
Amortized Cost	$ 640,499	$ 529,212
Gross Unrealized Gains	18,479	20,581
Gross Unrealized Losses	578	250
Investment securities available for sale	658,400	549,543
Total held to maturity
Amortized Cost	618,599	631,088
Gross Unrealized Gains	14,583	17,243
Gross Unrealized Losses	802	608
Fair Value	632,380	647,723
Total Investment Securities
Amortized Cost	1,259,098	1,160,300
Gross Unrealized Gains	33,062	37,824
Gross Unrealized Losses	1,380	858
Fair Value	1,290,780	1,197,266
U.S. Government-sponsored agency securities
Total available for sale
Amortized Cost	100	100
Gross Unrealized Gains	$ 4	$ 9
Gross Unrealized Losses
Investment securities available for sale	$ 104	$ 109
State and municipal
Total available for sale
Amortized Cost	291,730	216,915
Gross Unrealized Gains	14,241	11,801
Gross Unrealized Losses	60	123
Investment securities available for sale	305,911	228,593
Total held to maturity
Amortized Cost	219,767	204,443
Gross Unrealized Gains	6,982	5,716
Gross Unrealized Losses	15	96
Fair Value	226,734	210,063
U.S. Government-sponsored mortgage-backed securities
Total available for sale
Amortized Cost	342,550	310,460
Gross Unrealized Gains	4,234	8,771
Gross Unrealized Losses	518	127
Investment securities available for sale	346,266	319,104
Total held to maturity
Amortized Cost	398,832	426,645
Gross Unrealized Gains	7,601	11,527
Gross Unrealized Losses	787	512
Fair Value	405,646	437,660
Corporate obligations
Total available for sale
Amortized Cost	$ 31	$ 31
Gross Unrealized Gains
Gross Unrealized Losses
Investment securities available for sale	$ 31	$ 31
Equity securities
Total available for sale
Amortized Cost	$ 3,912	$ 1,706
Gross Unrealized Gains
Gross Unrealized Losses
Investment securities available for sale	$ 3,912	$ 1,706
Certificates of deposit
Total available for sale
Amortized Cost	$ 2,176
Gross Unrealized Gains
Gross Unrealized Losses
Investment securities available for sale	$ 2,176

Investment Securities - Narrati

Investment Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2015USD ($)security	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Fair value of investments	$ 177,584,000	$ 72,390,000
Unrealized losses on mortgage-backed securities portfolio	578,000	250,000
Unrealized losses in available for sale and held to maturity portfolios	802,000	608,000
Carrying value of securities pledged as collateral	637,358,000	449,408,000	$ 373,533,000
Gross gains on securities sold	2,770,000	3,581,000	487,000
Gross losses from sale of available for sale securities	100,000	0	$ 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	178,964,000	73,249,000
Fair value of investments	$ 177,584,000	$ 72,390,000
Percent of the Corporation's available for sale and held to maturity portfolio	13.90%	6.10%
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	$ 518,000	$ 127,000
Available-for-sale, number of securities in unrealized loss positions | security	26
Unrealized losses in available for sale and held to maturity portfolios	$ 787,000	512,000
Held-to-maturity, number of securities in unrealized loss positions | security	22
State and Municipal Securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Unrealized losses on mortgage-backed securities portfolio	$ 60,000	123,000
Available-for-sale, number of securities in unrealized loss positions | security	22
Unrealized losses in available for sale and held to maturity portfolios	$ 15,000	$ 96,000
Held-to-maturity, number of securities in unrealized loss positions | security	7
Merger with Ameriana Bancorp
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Percentage of interest acquired	100.00%
Investment securities acquired	$ 60,365,000

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, 2015	Dec. 31, 2014
Credit losses on debt securities held:
Balance, beginning of the period	$ 500	$ 11,355
Reductions for previous other-than-temporary losses realized on securities sold during the year	(500)	(10,855)
Balance, end of period	$ 0	$ 500

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, 2015	Dec. 31, 2014
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	$ 90,954	$ 3,442
Less than 12 Months, Gross Unrealized Losses	505	20
12 Months or Longer, Fair Value	2,101	15,297
12 Months or Longer, Gross Unrealized Losses	73	230
Total, Fair Value	93,055	18,739
Total, Gross Unrealized Losses	578	250
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	69,641	14,910
Less than 12 Months, Gross Unrealized Losses	519	178
12 Months or Longer, Fair Value	14,888	38,741
12 Months or Longer, Gross Unrealized Losses	283	430
Total, Fair Value	84,529	53,651
Total, Gross Unrealized Losses	802	608
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Less than 12 Months, Fair Value	160,595	18,352
Less than 12 Months, Gross Unrealized Losses	1,024	198
12 Months or Longer, Fair Value	16,989	54,038
12 Months or Longer, Gross Unrealized Losses	356	660
Total, Fair Value	177,584	72,390
Total, Gross Unrealized Losses	1,380	858
State and municipal
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	7,558	1,256
Less than 12 Months, Gross Unrealized Losses	$ 60	7
12 Months or Longer, Fair Value		9,850
12 Months or Longer, Gross Unrealized Losses		116
Total, Fair Value	$ 7,558	11,106
Total, Gross Unrealized Losses	60	123
U.S. Government-sponsored mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	83,396	2,186
Less than 12 Months, Gross Unrealized Losses	445	13
12 Months or Longer, Fair Value	2,101	5,447
12 Months or Longer, Gross Unrealized Losses	73	114
Total, Fair Value	85,497	7,633
Total, Gross Unrealized Losses	$ 518	127
State and municipal
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value		5,119
Less than 12 Months, Gross Unrealized Losses		96
12 Months or Longer, Fair Value	$ 1,982	$ 250
12 Months or Longer, Gross Unrealized Losses	15
Total, Fair Value	1,982	$ 5,369
Total, Gross Unrealized Losses	15	96
U.S. Government-sponsored mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 Months, Fair Value	69,641	9,791
Less than 12 Months, Gross Unrealized Losses	519	82
12 Months or Longer, Fair Value	12,906	38,491
12 Months or Longer, Gross Unrealized Losses	268	430
Total, Fair Value	82,547	48,282
Total, Gross Unrealized Losses	$ 787	$ 512

Investment Securities - Amort73

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, 2015	Dec. 31, 2014
Available for Sale, Amortized Cost
Due in one year or less	$ 4,658
Due after one through five years	13,725
Due after five through ten years	52,878
Due after ten years	220,600
Amortized Cost	291,861
Total Investment Securities	640,499
Available for Sale, Fair Value
Due in one year or less	4,704
Due after one through five years	14,295
Due after five through ten years	55,375
Due after ten years	231,672
Fair Value	306,046
Total Investment Securities	658,400
Held to Maturity, Amortized Cost
Due in one year or less	4,144
Due after one through five years	28,054
Due after five through ten years	81,483
Due after ten years	106,086
Amortized Cost	219,767
Total Investment Securities	618,599	$ 631,088
Held to Maturity, Fair Value
Due in one year or less	4,148
Due after one through five years	29,175
Due after five through ten years	83,646
Due after ten years	109,765
Fair Value	226,734
Total Investment Securities	632,380	647,723
U.S. Government-sponsored mortgage-backed securities
Available for Sale, Amortized Cost
Without single maturity date	342,550
Available for Sale, Fair Value
Without single maturity date	346,266
Held to Maturity, Amortized Cost
Total Investment Securities	398,832	426,645
Held to Maturity, Fair Value
Total Investment Securities	405,646	$ 437,660
Equity securities
Available for Sale, Amortized Cost
Without single maturity date	3,912
Available for Sale, Fair Value
Without single maturity date	3,912
Certificates of deposit
Available for Sale, Amortized Cost
Without single maturity date	2,176
Available for Sale, Fair Value
Without single maturity date	$ 2,176

Loans and Allowance - Narrative

Loans and Allowance - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 17, 2015	Nov. 07, 2014	Nov. 12, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 9,894				$ 7,235				$ 9,894	$ 7,235
Loans acquired through business combinations	430,289								430,289
Loans	4,693,822				3,924,865				4,693,822	3,924,865
Allowance for loan losses	62,453				63,964				62,453	63,964	$ 67,870				$ 69,366
Decrease in allowance for loan losses									1,511
Decrease in reserve on impaired loans									927
Reserve on impaired loans	$ 1,842				2,769				1,842	2,769	1,583
Net charge offs									1,928
Decrease in net charge offs									4,538
Provision for loan losses			$ 417		960	$ 1,600			417	2,560	6,648
Decrease in provision for loan losses									2,143
Commercial impaired loan total	$ 97,527				116,223				97,527	116,223	119,755
Merger with Ameriana Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired through business combinations	319,664								319,664
Commercial impaired loan total	11,365								11,365
Merger with C Financial Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired through business combinations												$ 110,625
Commercial impaired loan total	1,841								1,841
Merger with Community Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired through business combinations													$ 145,064
Commercial impaired loan total					17,027					17,027
Merger with CFS Bancorp, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired through business combinations														$ 603,114
Commercial impaired loan total											69,448
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	159,388				35,018				159,388	35,018
Increase in loans									124,370
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,802,921				1,672,661				1,802,921	1,672,661
Reserve on impaired loans	392				1,120				$ 392	1,120	894
Percentage of troubled debt restructured loans									46.00%
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	786,105				647,315				$ 786,105	647,315
Allowance for loan losses	11,139				13,152				11,139	13,152	15,077				$ 14,157
Reserve on impaired loans	173				194				173	194	6
Provision for loan losses									310	(839)	3,514
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,057,075				896,688				1,057,075	896,688
Reserve on impaired loans	$ 1,247				$ 1,055				$ 1,247	$ 1,055	$ 683
Percentage of troubled debt restructured loans									32.00%

Loans and Allowance - Compositi

Loans and Allowance - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 4,693,822	$ 3,924,865
Allowance for loan losses	(62,453)	(63,964)	$ (67,870)	$ (69,366)
Net Loans	4,631,369	3,860,901
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,057,075	896,688
Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	97,711	104,927
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	366,704	207,221
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,802,921	1,672,661
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	786,105	647,315
Allowance for loan losses	(11,139)	(13,152)	(15,077)	(14,157)
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	348,613	286,529
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	74,717	73,400
Allowance for loan losses	(2,689)	(2,658)	$ (2,515)	$ (2,593)
Lease financing receivables, net of unearned income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	588	1,106
Allowance for loan losses	(2)	(3)
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 159,388	$ 35,018

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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for loan losses:
Beginning balance				$ 63,964				$ 67,870	$ 63,964	$ 67,870	$ 69,366
Provision for losses			$ 417		$ 960	$ 1,600			417	2,560	6,648
Recoveries on loans									6,344	10,916	9,990
Loans charged off									(8,272)	(17,382)	(18,134)
Ending balance	$ 62,453				63,964				62,453	63,964	67,870
Commercial
Allowance for loan losses:
Beginning balance				$ 28,824				$ 27,176	28,824	27,176	25,913
Provision for losses									(1,901)	3,459	2,794
Recoveries on loans									1,911	5,435	4,586
Loans charged off									(2,356)	(7,246)	(6,117)
Ending balance	26,478				28,824				26,478	28,824	27,176
Commercial Real Estate
Allowance for loan losses:
Beginning balance				19,327				23,102	19,327	23,102	26,703
Provision for losses									1,710	(464)	340
Recoveries on loans									2,545	3,297	3,552
Loans charged off									(1,437)	(6,608)	(7,493)
Ending balance	22,145				19,327				22,145	19,327	23,102
Consumer
Allowance for loan losses:
Beginning balance				2,658				2,515	2,658	2,515	2,593
Provision for losses									299	423	(11)
Recoveries on loans									352	377	556
Loans charged off									(620)	(657)	(623)
Ending balance	2,689				2,658				2,689	2,658	2,515
Residential
Allowance for loan losses:
Beginning balance				13,152				$ 15,077	13,152	15,077	14,157
Provision for losses									310	(839)	3,514
Recoveries on loans									1,536	1,783	1,292
Loans charged off									(3,859)	(2,869)	(3,886)
Ending balance	11,139				13,152				11,139	$ 13,152	$ 15,077
Finance Leases
Allowance for loan losses:
Beginning balance				$ 3					3
Provision for losses									$ (1)	$ (19)	$ 11
Recoveries on loans										24	4
Loans charged off										(2)	$ (15)
Ending balance	$ 2				$ 3				$ 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, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	$ 1,689	$ 2,119
Allowance balances - Collectively evaluated for impairment	60,611	61,195
Allowance balances - Loans Acquired with Deteriorated Credit Quality	153	650
Total Allowance for Loan Losses	62,453	63,964	$ 67,870	$ 69,366
Loan balances - Individually evaluated for impairment	28,567	44,093
Loan balances - Collectively evaluated for impairment	4,595,698	3,807,707
Loans	4,693,822	3,924,865
Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	69,557	73,065
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	1,277	1,455
Allowance balances - Collectively evaluated for impairment	$ 25,201	$ 27,369
Allowance balances - Loans Acquired with Deteriorated Credit Quality
Total Allowance for Loan Losses	$ 26,478	$ 28,824	27,176	25,913
Loan balances - Individually evaluated for impairment	7,877	16,108
Loan balances - Collectively evaluated for impairment	1,298,988	1,011,122
Loans	1,314,174	1,036,633
Commercial | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	7,309	9,403
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	243	470
Allowance balances - Collectively evaluated for impairment	21,753	18,207
Allowance balances - Loans Acquired with Deteriorated Credit Quality	149	650
Total Allowance for Loan Losses	22,145	19,327	23,102	26,703
Loan balances - Individually evaluated for impairment	16,670	23,963
Loan balances - Collectively evaluated for impairment	2,096,089	1,796,797
Loans	2,169,625	1,879,882
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	56,866	59,122
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Collectively evaluated for impairment	2,689	2,658
Total Allowance for Loan Losses	2,689	2,658	2,515	2,593
Loan balances - Collectively evaluated for impairment	74,717	73,400
Loans	74,717	73,400
Residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Individually evaluated for impairment	169	194
Allowance balances - Collectively evaluated for impairment	10,966	12,958
Allowance balances - Loans Acquired with Deteriorated Credit Quality	4
Total Allowance for Loan Losses	11,139	13,152	$ 15,077	$ 14,157
Loan balances - Individually evaluated for impairment	4,020	4,022
Loan balances - Collectively evaluated for impairment	1,125,316	925,282
Loans	1,134,718	933,844
Residential | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan balances - Loans Acquired with Deteriorated Credit Quality	5,382	4,540
Finance Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balances - Collectively evaluated for impairment	$ 2	3
Allowance balances - Loans Acquired with Deteriorated Credit Quality
Total Allowance for Loan Losses	$ 2	3
Loan balances - Collectively evaluated for impairment	588	1,106
Loans	$ 588	$ 1,106

Loans and Allowance - Summary o

Loans and Allowance - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 31,389	$ 48,789
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	4,634	7,048
Agriculture production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	827	5,800
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	736	1,439
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	11,277	19,350
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	11,818	12,933
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,952	1,988
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 145	$ 231

Loans and Allowance - Composi79

Loans and Allowance - Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unpaid Principal Balance
Impaired loans with no related allowance	$ 134,581	$ 158,563	$ 189,779
Impaired loans with related allowance	7,953	16,703	6,121
Total Impaired Loans	142,534	175,266	195,900
Recorded Investment
Impaired loans with no related allowance	90,975	102,793	114,253
Impaired loans with related allowance	6,552	13,430	5,502
Total Impaired Loans	97,527	116,223	119,755
Related Allowance	1,842	2,769	1,583
Average Recorded Investment
Impaired loans with no related allowance	96,423	106,807	119,561
Impaired loans with related allowance	6,945	15,764	5,607
Total Impaired Loans	103,368	122,571	125,168
Interest Income Recognized
Impaired loans with no related allowance	4,217	4,297	2,048
Impaired loans with related allowance	38	65	18
Total Impaired Loans	4,255	4,362	2,066
Commercial and industrial loans
Unpaid Principal Balance
Impaired loans with no related allowance	22,151	35,514	35,066
Impaired loans with related allowance	3,043	1,766	1,390
Recorded Investment
Impaired loans with no related allowance	11,669	18,029	16,371
Impaired loans with related allowance	2,690	1,684	1,216
Related Allowance	1,247	1,055	683
Average Recorded Investment
Impaired loans with no related allowance	12,578	18,711	19,209
Impaired loans with related allowance	2,752	1,721	1,240
Interest Income Recognized
Impaired loans with no related allowance	488	362	192
Impaired loans with related allowance	38	40	9
Agriculture production financing and other loans to farmers
Unpaid Principal Balance
Impaired loans with no related allowance	370	26	32
Impaired loans with related allowance	466	6,777
Recorded Investment
Impaired loans with no related allowance	361	22	30
Impaired loans with related allowance	466	5,777
Related Allowance	30	400
Average Recorded Investment
Impaired loans with no related allowance	439	26	32
Impaired loans with related allowance	$ 538	8,044
Interest Income Recognized
Impaired loans with related allowance		1
Construction
Unpaid Principal Balance
Impaired loans with no related allowance	$ 4,551	12,956	16,109
Recorded Investment
Impaired loans with no related allowance	2,336	9,318	10,625
Average Recorded Investment
Impaired loans with no related allowance	3,662	9,837	11,621
Interest Income Recognized
Impaired loans with no related allowance	157	427	117
Commercial and farmland
Unpaid Principal Balance
Impaired loans with no related allowance	95,930	95,856	128,073
Impaired loans with related allowance	2,144	7,159	4,657
Recorded Investment
Impaired loans with no related allowance	69,024	68,187	83,033
Impaired loans with related allowance	1,933	4,971	4,215
Related Allowance	392	1,120	894
Average Recorded Investment
Impaired loans with no related allowance	71,569	70,844	84,057
Impaired loans with related allowance	1,868	4,999	4,291
Interest Income Recognized
Impaired loans with no related allowance	$ 3,328	3,389	1,663
Impaired loans with related allowance		24	9
Residential
Unpaid Principal Balance
Impaired loans with no related allowance	$ 11,262	10,591	6,746
Impaired loans with related allowance	2,300	1,001	74
Recorded Investment
Impaired loans with no related allowance	7,338	6,839	3,910
Impaired loans with related allowance	1,463	998	71
Related Allowance	173	194	6
Average Recorded Investment
Impaired loans with no related allowance	7,926	6,987	4,236
Impaired loans with related allowance	1,787	1,000	76
Interest Income Recognized
Impaired loans with no related allowance	$ 244	$ 119	$ 75
Impaired loans with related allowance
Home equity
Unpaid Principal Balance
Impaired loans with no related allowance	$ 297	$ 3,590	$ 3,299
Recorded Investment
Impaired loans with no related allowance	247	398	112
Average Recorded Investment
Impaired loans with no related allowance	$ 249	$ 402	$ 225
Interest Income Recognized
Impaired loans with no related allowance
Other commercial loans
Unpaid Principal Balance
Impaired loans with no related allowance	$ 20	$ 30	$ 454
Recorded Investment
Impaired loans with no related allowance			172
Average Recorded Investment
Impaired loans with no related allowance			181
Interest Income Recognized
Impaired loans with no related allowance			$ 1

Loans and Allowance - Credit Qu

Loans and Allowance - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 4,693,822	$ 3,924,865
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,057,075	896,688
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	97,711	104,927
Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	366,704	207,221
Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,802,921	1,672,661
Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	786,105	647,315
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	348,613	286,529
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	74,717	73,400
Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	588	1,106
Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	159,388	35,018
Commercial Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	3,404,491	2,849,876
Commercial Pass | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	962,340	823,732
Commercial Pass | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	77,884	96,155
Commercial Pass | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	345,449	185,394
Commercial Pass | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,679,141	1,552,781
Commercial Pass | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	171,576	149,430
Commercial Pass | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	8,218	6,368
Commercial Pass | Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	495	998
Commercial Pass | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	159,388	35,018
Commercial Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	105,965	64,631
Commercial Special Mention | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	48,432	24,455
Commercial Special Mention | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	6,665	1,195
Commercial Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	1,271	3,164
Commercial Special Mention | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	46,442	29,484
Commercial Special Mention | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	3,107	6,321
Commercial Special Mention | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	48	12
Commercial Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	149,395	160,608
Commercial Substandard | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	45,984	48,226
Commercial Substandard | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	13,162	7,577
Commercial Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	1,790	2,928
Commercial Substandard | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	77,338	90,161
Commercial Substandard | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	10,428	10,918
Commercial Substandard | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	600	690
Commercial Substandard | Finance Leases
Financing Receivable, Recorded Investment [Line Items]
Loans	93	$ 108
Commercial Substandard | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	319	$ 275
Commercial Doubtful | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	319	$ 275
Commercial Doubtful | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	1,023,856	$ 837,296
Consumer Performing | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	18,114	15,588
Consumer Performing | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	593,533	470,972
Consumer Performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	337,718	277,571
Consumer Performing | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	74,491	73,165
Consumer Non Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	9,796	12,179
Consumer Non Performing | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 80	147
Consumer Non Performing | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans		235
Consumer Non Performing | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 7,461	9,674
Consumer Non Performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	2,029	1,888
Consumer Non Performing | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 226	$ 235

Loans and Allowance - Past Due

Loans and Allowance - Past Due Aging of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 4,641,215	$ 3,846,157
Loans 90 Days And Accruing	907	4,663
Non-Accrual	31,389	48,789
Total Past Due & Non-Accrual	52,607	78,708
Total	4,693,822	3,924,865
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17,570	22,107
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,741	3,149
Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,052,275	882,596
Loans 90 Days And Accruing		2,985
Non-Accrual	$ 4,634	7,048
Total Past Due & Non-Accrual	4,800	14,092
Total	1,057,075	896,688
Commercial and industrial loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 166	4,006
Commercial and industrial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		53
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 96,884	$ 98,236
Loans 90 Days And Accruing
Non-Accrual	827	$ 5,800
Total Past Due & Non-Accrual	827	6,691
Total	$ 97,711	104,927
Agricultural production financing and other loans to farmers | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		$ 891
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	$ 362,084	$ 204,683
Non-Accrual	736	1,439
Total Past Due & Non-Accrual	4,620	2,538
Total	366,704	207,221
Construction | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 3,884	1,017
Construction | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		82
Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,786,092	1,642,016
Loans 90 Days And Accruing		671
Non-Accrual	$ 11,277	19,350
Total Past Due & Non-Accrual	16,829	30,645
Total	1,802,921	1,672,661
Commercial and farmland | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 5,552	9,846
Commercial and farmland | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		778
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 765,634	626,821
Loans 90 Days And Accruing	502	854
Non-Accrual	11,818	12,933
Total Past Due & Non-Accrual	20,471	20,494
Total	786,105	647,315
Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,090	4,876
Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,061	1,831
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	344,344	282,828
Loans 90 Days And Accruing	324	148
Non-Accrual	1,952	1,988
Total Past Due & Non-Accrual	4,269	3,701
Total	348,613	286,529
Home equity | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,433	1,213
Home equity | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	560	352
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	73,990	72,853
Loans 90 Days And Accruing	81	5
Non-Accrual	145	231
Total Past Due & Non-Accrual	727	547
Total	74,717	73,400
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	445	258
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	56	53
Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	588	$ 1,106
Non-Accrual
Total Past Due & Non-Accrual
Total	588	$ 1,106
Other commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 159,324	$ 35,018
Non-Accrual
Total Past Due & Non-Accrual	$ 64
Total	159,388	$ 35,018
Other commercial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 64

Loans and Allowance - Summary82

Loans and Allowance - Summary of Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)loan	Dec. 31, 2014USD ($)loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 5,960	$ 1,237
Post-Modification Recorded Balance	$ 6,601	$ 1,257
Number of Loans | loan	23	23
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 4,111
Post-Modification Recorded Balance	$ 2,115
Number of Loans | loan	7
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	$ 1,281	$ 259
Post-Modification Recorded Balance	$ 3,024	$ 259
Number of Loans | loan	3	1
Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 200	$ 632
Post-Modification Recorded Balance	$ 1,113	$ 622
Number of Loans | loan	10	9
Home equity
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 263	$ 320
Post-Modification Recorded Balance	$ 242	$ 350
Number of Loans | loan	1	11
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 26	$ 26
Post-Modification Recorded Balance	$ 27	$ 26
Number of Loans | loan	1	2

Loans and Allowance - Summary83

Loans and Allowance - Summary of Troubled Debt Restructurings by Modification (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total Modification	$ 5,378	$ 1,263
Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	2,815	319
Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	439	318
Combination
Financing Receivable, Modifications [Line Items]
Total Modification	2,124	626
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Total Modification	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	1,053
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Total Modification	2,257	288
Commercial and farmland | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	1,231	$ 288
Commercial and farmland | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Commercial and farmland | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	1,026
Residential
Financing Receivable, Modifications [Line Items]
Total Modification	1,038	$ 609
Residential | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	823	31
Residential | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	170	218
Residential | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	45	360
Home equity
Financing Receivable, Modifications [Line Items]
Total Modification	242	$ 343
Home equity | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Home equity | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	$ 242	$ 100
Home equity | Combination
Financing Receivable, Modifications [Line Items]
Total Modification		243
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Total Modification	$ 27	$ 23
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	$ 27
Individuals' loans for household and other personal expenditures | Combination
Financing Receivable, Modifications [Line Items]
Total Modification		$ 23

Loans and Allowance - Subsequen

Loans and Allowance - Subsequent Default (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)loan	Dec. 31, 2014USD ($)loan
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	1	1
Recorded Balance | $	$ 21	$ 70
Residential
Financing Receivable, Impaired [Line Items]
Number of Loans | loan	1	1
Recorded Balance | $	$ 21	$ 70

Accounting for Certain Loans 85

Accounting for Certain Loans Acquired in a Purchase - Carrying Amount of Loans Included in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 961,382	$ 698,457
Carrying Amount	917,589	658,471
Allowance	153	650
Carrying Amount	917,436	657,821
Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	330,918
Carrying Amount	319,664
Carrying Amount	319,664
C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	99,166
Carrying Amount	96,829
Carrying Amount	96,829
Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	99,541	142,989
Carrying Amount	93,355	134,198
Allowance	4
Carrying Amount	93,351	134,198
CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	393,014	509,660
Carrying Amount	373,649	484,949
Allowance	149	650
Carrying Amount	373,500	484,299
SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	38,743	45,808
Carrying Amount	$ 34,092	39,324
Allowance
Carrying Amount	$ 34,092	39,324
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	85,441	79,124
Commercial and industrial loans | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	21,888
Commercial and industrial loans | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	104
Commercial and industrial loans | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	6,769	8,168
Commercial and industrial loans | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	52,060	64,897
Commercial and industrial loans | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	4,620	6,059
Agriculture production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	3,049	1,993
Agriculture production financing and other loans to farmers | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 1,761	1,100
Agriculture production financing and other loans to farmers | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance
Agriculture production financing and other loans to farmers | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 1,288	893
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	40,991	28,176
Construction | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	23,365
Construction | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	6,214
Construction | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	10,436	19,063
Construction | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 976	9,113
Construction | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 425,014	341,195
Commercial and farmland | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	144,514
Commercial and farmland | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	27,838
Commercial and farmland | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	49,997	74,600
Commercial and farmland | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	189,372	251,002
Commercial and farmland | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	13,293	15,593
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	325,141	180,643
Residential | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	123,231
Residential | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	55,856
Residential | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	21,886	28,863
Residential | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	118,105	144,396
Residential | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	6,063	7,384
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	77,053	64,883
Home equity | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	14,261
Home equity | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	9,144
Home equity | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	8,231	9,881
Home equity | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	31,986	39,244
Home equity | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	13,431	15,758
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2,693	2,357
Individuals' loans for household and other personal expenditures | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	1,731
Individuals' loans for household and other personal expenditures | C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	10
Individuals' loans for household and other personal expenditures | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	461	1,314
Individuals' loans for household and other personal expenditures | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	443	922
Individuals' loans for household and other personal expenditures | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	48	121
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	2,000	86
Other commercial loans | Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 1,928
Other commercial loans | Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance
Other commercial loans | CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	$ 72	$ 86
Other commercial loans | SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance

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, 2015	Dec. 31, 2014	Dec. 31, 2013
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 5,390	$ 5,552	$ 1,715
Additions	2,993	2,234	3,502
Accretion	(5,850)	(5,439)	(473)
Reclassification from nonaccretable	3,925	3,249	849
Disposals	(158)	(206)	(41)
Ending balance	$ 6,300	$ 5,390	$ 5,552
Ameriana
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance
Additions	$ 2,848
Ending balance	$ 2,848
C Financial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance
Additions	$ 145
Accretion	(31)
Ending balance	114
Community
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	2,122
Additions		$ 2,234
Accretion	(723)	(231)
Reclassification from nonaccretable	249	119
Disposals	(140)
Ending balance	1,508	2,122
CFS
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	2,400	4,164
Additions			$ 3,502
Accretion	(4,050)	(4,146)	(10)
Reclassification from nonaccretable	2,854	2,553	672
Disposals	(16)	(171)
Ending balance	1,188	2,400	4,164
SCB
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	868	1,388	$ 1,715
Additions
Accretion	(1,046)	(1,062)	$ (463)
Reclassification from nonaccretable	822	577	177
Disposals	(2)	(35)	(41)
Ending balance	$ 642	$ 868	$ 1,388

Accounting for Certain Loans 87

Accounting for Certain Loans Acquired in a Purchase - Contractually Required Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	$ 31,725
Nonaccretable difference	14,365
Expected cash flows at acquisition date	17,360
Accretable difference	2,993
Basis in loans at acquisition date	14,367
Ameriana
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	29,093
Nonaccretable difference	13,728
Expected cash flows at acquisition date	15,365
Accretable difference	2,848
Basis in loans at acquisition date	12,517
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
Community
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date		$ 26,032
Nonaccretable difference		3,498
Expected cash flows at acquisition date		22,534
Accretable difference		2,234
Basis in loans at acquisition date		$ 20,300

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Premises and Equipment [Line Items]
Total Cost	$ 206,863	$ 175,430
Accumulated Depreciation and Amortization	(109,215)	(97,739)
Net	97,648	77,691
Land
Premises and Equipment [Line Items]
Total Cost	26,510	19,373
Buildings and Leasehold Improvements
Premises and Equipment [Line Items]
Total Cost	115,461	99,451
Equipment
Premises and Equipment [Line Items]
Total Cost	$ 64,892	$ 56,606

Premises and Equipment - Narrat

Premises and Equipment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 17, 2015	Nov. 07, 2014
Premises and Equipment [Line Items]
Rent expense	$ 3,456	$ 3,258	$ 2,608
Merger with Ameriana Bancorp
Premises and Equipment [Line Items]
Premises and equipment acquired	$ 14,491
Merger with C Financial Corporation
Premises and Equipment [Line Items]
Premises and equipment acquired				$ 7,290
Merger with Community Bancshares, Inc.
Premises and Equipment [Line Items]
Premises and equipment acquired					$ 3,610

Premises and Equipment - Schedu

Premises and Equipment - Schedule of Future Minimum Rental Payments for Operating Leases (Details) $ in Thousands	Dec. 31, 2015USD ($)
Property, Plant and Equipment [Abstract]
2,016	$ 3,076
2,017	2,353
2,018	1,419
2,019	1,222
2,020	1,060
After 2,020	6,629
Total Future Minimum Obligations	$ 15,759

Goodwill - Narrative (Details)

Goodwill - Narrative (Details) - USD ($)	Jun. 12, 2015	Dec. 31, 2015	Dec. 31, 2014	Apr. 17, 2015	Nov. 07, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill		$ 243,129,000	$ 202,724,000			$ 188,948,000
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		$ 37,753,000
Merger with C Financial Corporation
Business Acquisition [Line Items]
Goodwill				$ 11,126,000
Merger with Community Bancshares, Inc.
Business Acquisition [Line Items]
Goodwill					$ 13,776,000

Goodwill - Rollforward (Details

Goodwill - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 202,724	$ 188,948
Goodwill acquired	48,879	$ 13,776
Goodwill reduction	(8,474)
Ending balance	$ 243,129	$ 202,724

Core Deposit and Other Intang93

Core Deposit and Other Intangibles - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 12, 2015	Apr. 17, 2015	Nov. 07, 2014
Business Acquisition [Line Items]
Core deposit intangible and other intangibles reduction	$ 742
Core deposit amortization	2,835	$ 2,445	$ 1,649
FMIG
Business Acquisition [Line Items]
Core deposit intangible and other intangibles reduction				$ 742
Merger with Ameriana Bancorp
Business Acquisition [Line Items]
Core deposit intangible	$ 3,200
Merger with C Financial Corporation
Business Acquisition [Line Items]
Core deposit intangible					$ 981
Merger with Community Bancshares, Inc.
Business Acquisition [Line Items]
Core deposit intangible						$ 4,658

Core Deposit and Other Intang94

Core Deposit and Other Intangibles - Schedule of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount	$ 58,360	$ 53,702
Core deposit intangible and other intangibles acquired	4,181	4,658
Accumulated amortization	(45,164)	$ (42,329)
Core deposit intangible and other intangibles reduction	(742)
Core Deposit and Other Intangibles	$ 16,635	$ 16,031

Core Deposit and Other Intang95

Core Deposit and Other Intangibles - Schedule of Estimated Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amortization Expense
2,016	$ 3,055
2,017	3,017
2,018	1,904
2,019	1,676
2,020	1,618
After 2,020	5,365
Core Deposit and Other Intangibles	$ 16,635	$ 16,031

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Demand deposits	$ 2,576,283	$ 2,146,492
Savings deposits	1,518,722	1,376,707
Certificates and other time deposits of $100,000 or more	323,698	260,685
Other certificates and time deposits	556,476	523,010
Brokered deposits	314,468	333,800
Total Deposits	$ 5,289,647	$ 4,640,694

Deposits - Schedule of Contract

Deposits - Schedule of Contractual Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2015USD ($)
Certificates and Other Time Deposits
2,016	$ 600,551
2,017	272,652
2,018	126,929
2,019	74,750
2,020	55,187
After 2,020	64,573
Total	$ 1,194,642

Transfers Accounted for as Se98

Transfers Accounted for as Secured Borrowings (Details) - U.S. Government-sponsored mortgage-backed securities $ in Thousands	Dec. 31, 2015USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 155,325
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	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	5,680
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	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	$ 9,216

Borrowings - Schedule of Debt (

Borrowings - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Federal funds purchased	$ 49,721	$ 15,381
Securities sold under repurchase agreements	155,325	124,539
Federal Home Loan Bank advances	235,652	145,264
Subordinated debentures and term loans	127,846	126,810
Total Borrowings	$ 568,544	$ 411,994

Borrowings - Narrative (Details

Borrowings - Narrative (Details)	Aug. 10, 2015USD ($)	Apr. 11, 2014USD ($)	Nov. 01, 2013USD ($)investor	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Apr. 17, 2015USD ($)	Sep. 15, 2012	Jul. 02, 2007USD ($)
Debt Instrument [Line Items]
Interest rate, minimum (as a percent)				0.00%
Interest rate, maximum (as a percent)				6.81%
Total available remaining borrowing capacity from FHLB				$ 388,176,000
Putable advances with the FHLB				235,652,000	$ 145,264,000
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	$ 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%
Ameriana
Debt Instrument [Line Items]
Federal Home Loan Bank advances assumed at acquisition				24,938,000
C Financial
Debt Instrument [Line Items]
Federal Home Loan Bank advances assumed at acquisition				11,597,000			$ 18,958,000
Federal Home Loan Bank advances matured during the period				7,361,000
Putable Advances
Debt Instrument [Line Items]
Putable 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				146.00%
Securities Sold Under Repurchase Agreements
Debt Instrument [Line Items]
Maximum amount of outstanding agreements				$ 163,128,000	155,941,000
Total of average agreements				143,491,000	130,910,000
Debt outstanding				155,325,000
Subordinated Debentures and Term Loans
Debt Instrument [Line Items]
Debt outstanding				127,846,000	$ 126,810,000
Subordinated Debenture | First Merchant Capital Trust II
Debt Instrument [Line Items]
Debt outstanding				$ 51,702,000
Debt face amount			$ 70,000,000						$ 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)				2.10%	1.80%			6.495%
Basis spread on variable rate (as a percent)					1.56%
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)				2.00%
Basis spread on variable rate (as a percent)				1.50%
Line of Credit | Bank of America, N.A. | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity			$ 55,000,000

Borrowings - Schedule of Maturi

Borrowings - Schedule of Maturities of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Federal Funds Purchased
Maturities in Years Ending December 31:
2,016	$ 49,721
Total	49,721
Securities Sold Under Repurchase Agreements
Maturities in Years Ending December 31:
2,016	155,325
Total	155,325
Federal Home Loan Bank Advances
Maturities in Years Ending December 31:
2,016	91,441
2,017	37,222
2,018	26,851
2,019	13,828
2,020	31,310
After 2,020	35,000
Total	235,652
Subordinated Debentures and Term Loans
Maturities in Years Ending December 31:
2,016	183
After 2,020	132,012
ASC 805 fair value adjustments at acquisition	(4,349)
Total	$ 127,846	$ 126,810

Derivative Instruments and H102

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, 2015	Dec. 31, 2014
Derivatives Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 36	$ 137
Derivatives Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	2,921	2,650
Derivatives Not Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	4,938	3,730
Derivatives Not Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 5,149	$ 3,887

Derivative Instruments and H103

Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)interest_rate_swapinterest_rate_cap	Dec. 31, 2014USD ($)interest_rate_swapinterest_rate_cap
Derivative [Line Items]
Termination value of derivatives in a net liability position	$ 8,367
Derivative collateral posted	11,690
Not Designated as Hedging Instruments
Derivative [Line Items]
Notional amount of interest rate derivatives	192,759
Cash Flow Hedging
Derivative [Line Items]
Estimated amount to be transferred from OCI to earnings	$ 1,157
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	$ 56,000
Interest Rate Swap | Cash Flow Hedging | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	26,000
Interest Rate Swap | Cash Flow Hedging | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 30,000
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	$ 13,000
Interest Rate Cap | Cash Flow Hedging | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 13,000

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, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow Hedging
Derivative [Line Items]
Amount of Loss Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ (1,681)	$ (3,996)
Cash Flow Hedging | Interest expense
Derivative [Line Items]
Amount of Loss Reclassified from Other Comprehensive Income Into Income (Effective Portion)	(1,427)	(1,411)	$ (935)
Not Designated as Hedging Instruments | Other income
Derivative [Line Items]
Amount of Gain (Loss) Recognized Income on Derivative	$ (53)	$ (73)	$ 247

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, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 658,400	$ 549,543
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	652,468	542,897
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,932	6,646
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability derivatives	8,070	6,537
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	104	109
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	300,014	221,982
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	346,266	319,104
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	3,908	1,702
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	4,938	3,730
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	36	137
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	5,897	6,611
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]
Liability derivatives	8,070	6,537
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	104	109
Fair Value, Measurements, Recurring | Fair Value | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	305,911	228,593
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	346,266	319,104
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	3,912	1,706
Fair Value, Measurements, Recurring | Fair Value | Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	4,938	3,730
Fair Value, Measurements, Recurring | Fair Value | Interest rate cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives	$ 36	$ 137

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, 2015	Dec. 31, 2014
Available for Sale Securities
Beginning Balance	$ 6,646	$ 9,977
Included in other comprehensive income	199	3,656
Principal payments	(913)	(6,987)
Ending balance	$ 5,932	$ 6,646

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, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Transfer between Levels 1, 2 and 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, 2015	Dec. 31, 2014
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	$ 7,066	$ 17,134
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	5,529	5,155
Fair Value | Impaired Loans (collateral dependent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	7,066	17,134
Fair Value | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 5,529	$ 5,155

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, 2015	Dec. 31, 2014
Discounted cash flow | State and municipal securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 5,897	$ 6,611
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	0.80%	0.90%
Discounted cash flow | State and municipal securities | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Maturity Call Date	15 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	2.00%	2.00%
Collateral based measurements | Impaired loans (collateral dependent)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 7,066	$ 17,134
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	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	50.00%	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	2.00%	3.00%
Appraisals | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 5,529	$ 5,155
Appraisals | Other real estate owned | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions	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	20.00%	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	2.00%	7.00%

Fair Values of Financial Ins110

Fair Values of Financial Instruments - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Investment securities available for sale	$ 658,400	$ 549,543
Investment securities held to maturity	632,380	647,723
Loans held for sale	9,894	7,235
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	102,170	118,616
Interest-bearing time deposits	32,315	47,520
Liabilities:
Deposits	4,095,004	3,532,199
Significant Other Observable Inputs (Level 2)
Assets:
Investment securities available for sale	652,468	542,897
Investment securities held to maturity	598,082	614,457
Loans held for sale	9,894	7,235
Federal Reserve and Federal Home Loan Bank stock	37,633	41,353
Interest rate swap asset	4,974	3,867
Interest receivable	24,415	19,984
Liabilities:
Deposits	1,177,142	1,099,610
Borrowings:
Federal funds purchased	49,721	15,381
Securities sold under repurchase agreements	155,325	124,539
Federal Home Loan Bank advances	236,375	146,669
Subordinated debentures and term loans	103,643	92,802
Interest rate swap liability	8,070	6,537
Interest payable	3,092	3,201
Significant Unobservable Inputs (Level 3)
Assets:
Investment securities available for sale	5,932	6,646
Investment securities held to maturity	34,298	33,266
Loans	4,539,940	3,810,912
Carrying Amount
Assets:
Cash and cash equivalents	102,170	118,616
Interest-bearing time deposits	32,315	47,520
Investment securities available for sale	658,400	549,543
Investment securities held to maturity	618,599	631,088
Loans held for sale	9,894	7,235
Loans	4,631,369	3,860,901
Federal Reserve and Federal Home Loan Bank stock	37,633	41,353
Interest rate swap asset	4,974	3,867
Interest receivable	24,415	19,984
Liabilities:
Deposits	5,289,647	4,640,694
Borrowings:
Federal funds purchased	49,721	15,381
Securities sold under repurchase agreements	155,325	124,539
Federal Home Loan Bank advances	235,652	145,264
Subordinated debentures and term loans	127,846	126,810
Interest rate swap liability	8,070	6,537
Interest payable	$ 3,092	$ 3,201

Commitments and Contingent L111

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Loan commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 1,547,048	$ 1,617,552
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 46,734	$ 52,655

Stockholders' Equity (Details)

Stockholders' Equity (Details)	Dec. 31, 2015USD ($)$ / sharesshares	Nov. 07, 2014USD ($)$ / sharesshares	Nov. 22, 2013USD ($)shares	Nov. 12, 2013USD ($)shares	Jul. 02, 2013USD ($)shares	Jan. 03, 2013USD ($)shares	Sep. 22, 2011USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)	Dec. 31, 2012USD ($)
Class of Stock [Line Items]
Stockholders' equity	$ 850,509,000							$ 850,509,000	$ 726,827,000	$ 634,923,000	$ 552,236,000
Dividend reinvestment and stock purchase plan, stockholder's maximum amount of cash payments per quarter in purchase of common stock								$ 2,500
Preferred stock, liquidation value (in dollars per share) | $ / shares	$ 1,000							$ 1,000	$ 1,000
Price of preferred stock redeemed								$ 1,640,000	$ 1,067,000	491,000
Preferred stock, shares outstanding | shares	125							125	125
Value of stock issued as a part of acquisition								$ 70,402,000	$ 34,981,000	$ 135,642,000
Cash paid in acquisition								$ 14,500,000	$ 14,208,000
Merger with CFS Bancorp, Inc.
Class of Stock [Line Items]
Percentage of interest acquired				100.00%
Value of stock issued as a part of acquisition				$ 135,600,000
Percentage of common stock received per shares owned through acquisition				0.65%
Stock issued as a part of acquisition (in shares) | shares				7,100,000
Total purchase price				$ 135,642,000
Merger with Community Bancshares, Inc.
Class of Stock [Line Items]
Percentage of interest acquired		100.00%
Value of stock issued as a part of acquisition		$ 35,000,000
Stock issued as a part of acquisition (in shares) | shares		1,600,000
Number of shares of common stock		4.0926
Share price (in dollars per share) | $ / shares		$ 85.94
Cash paid in acquisition		$ 14,200,000
Total purchase price		$ 49,189,000
Merger with Ameriana Bancorp
Class of Stock [Line Items]
Percentage of interest acquired	100.00%							100.00%
Value of stock issued as a part of acquisition	$ 70,400,000
Stock issued as a part of acquisition (in shares) | shares	2,800,000
Total purchase price	$ 70,402,000							$ 70,402,000
Series B Preferred Stock
Class of Stock [Line Items]
Number of new stock issued during the period (shares) | shares							90,782.94
Preferred stock, liquidation value (in dollars per share) | $ / shares							$ 1,000
Number of new stock issued during the period value							$ 90,782,940
Preferred stock redeemed (in shares) | shares			34,043		34,044	22,695.94
Price of preferred stock redeemed			$ 34,043,000		$ 34,044,000	$ 22,695,940
Preferred stock, shares outstanding | shares	0				34,043	68,087		0
Series B Preferred Stock remaining liquidation amount					$ 34,000,000	$ 68,000,000
Common Stock | Merger with Ameriana Bancorp
Class of Stock [Line Items]
Number of shares of common stock	0.9037							0.9037
Subsidiaries
Class of Stock [Line Items]
Amount available for dividends	$ 29,812,000							$ 29,812,000
Stockholders' equity	930,360,000							930,360,000
Stockholders' equity restricted from dividend distribution	$ 900,548,000							$ 900,548,000
CFS Bancorp | Merger with CFS Bancorp, Inc.
Class of Stock [Line Items]
Percentage of common stock received per shares owned through acquisition				0.65%

Accumulated Other Comprehens113

Accumulated Other Comprehensive Income (Loss) - Summary of Changes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
AOCI - beginning balance	$ (1,630)	$ (6,410)
Other comprehensive income before reclassifications	1,274	6,528
Amounts reclassified from accumulated other comprehensive income	(1,006)	(1,748)
Period change	268	4,780	$ (911)
AOCI - ending balance	(1,362)	(1,630)	(6,410)
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income [Roll Forward]
AOCI - beginning balance	14,098	1,566
Other comprehensive income before reclassifications	(37)	14,860
Amounts reclassified from accumulated other comprehensive income	(1,736)	(2,328)
Period change	(1,773)	12,532
AOCI - ending balance	12,325	14,098	1,566
Unrealized Gains (Losses) on Securities Available for Sale for which a Portion of Other-Than-Temporary Impairment has been Recognized in Income
Accumulated Other Comprehensive Income [Roll Forward]
AOCI - beginning balance	$ 0	(1,847)
Other comprehensive income before reclassifications		$ 1,847
Amounts reclassified from accumulated other comprehensive income
Period change	$ 0	$ 1,847
AOCI - ending balance	0	0	(1,847)
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
AOCI - beginning balance	(2,182)	(501)
Other comprehensive income before reclassifications	(1,093)	(2,599)
Amounts reclassified from accumulated other comprehensive income	928	918
Period change	(165)	(1,681)
AOCI - ending balance	(2,347)	(2,182)	(501)
Unrealized Gains (Losses) on Defined Benefit Plans
Accumulated Other Comprehensive Income [Roll Forward]
AOCI - beginning balance	(13,546)	(5,628)
Other comprehensive income before reclassifications	2,404	(7,580)
Amounts reclassified from accumulated other comprehensive income	(198)	(338)
Period change	2,206	(7,918)
AOCI - ending balance	$ (11,340)	$ (13,546)	$ (5,628)

Accumulated Other Comprehens114

Accumulated Other Comprehensive Income (Loss) - Reclassifications (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Interest expense - subordinated debentures and term loans									$ (6,661)	$ (6,616)	$ (3,531)
Other expenses - salaries and employee benefits									(101,908)	(96,499)	(85,413)
Income tax expense	$ (4,418)	$ (6,557)	$ (8,856)	$ (5,834)	$ (5,638)	$ (5,980)	$ (5,888)	$ (4,617)	(25,665)	(22,123)	(15,884)
NET INCOME	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 15,260	$ 16,122	$ 15,160	$ 13,620	65,384	60,162	44,530
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME									1,006	1,748	(1,438)
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									2,670	3,581	487
Income tax expense									(934)	(1,253)	(170)
NET INCOME									1,736	2,328	317
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]
Interest expense - subordinated debentures and term loans									(1,427)	(1,411)	(935)
Income tax expense									499	493	327
NET INCOME									(928)	(918)	(608)
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]
Other expenses - salaries and employee benefits									305	520	(1,765)
Income tax expense									(107)	(182)	618
NET INCOME									$ 198	$ 338	$ (1,147)

Regulatory Capital (Details)

Regulatory Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Total Risk-based Capital to Risk-weighted Assets, Amount
Actual	$ 783,776	$ 685,507
Prompt Corrective Action Thresholds, Adequate Capital	419,809	357,581
Tier 1 Capital to Risk-weighted Assets, Amount
Actual	656,323	564,535
Prompt Corrective Action Thresholds, Adequate Capital	314,857	178,791
Common Equity Tier One Capital to Risk-weighted Assets, Amount
Actual	603,063
Prompt Corrective Action Thresholds, Adequate Capital	236,143
Tier I Capital to Average Assets, Amount
Actual	656,323	564,535
Prompt Corrective Action Thresholds, Adequate Capital	$ 242,001	$ 222,533
Risk Based Ratios
Total Capital to Risk-weighted Assets, Actual Ratio	14.94%	15.34%
Total Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	8.00%	8.00%
Tier I Capital to Risk-weighted Assets, Actual Ratio	12.51%	12.63%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	6.00%	4.00%
Common Equity Tier 1 Capital to Risk-weighted Assets, Actual Ratio	11.49%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequately Capitalized Ratio	4.50%
Leverage Ratios
Tier I Capital to Average Assets, Actual Ratio	10.85%	10.15%
Tier I Capital to Average Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	4.00%	4.00%
First Merchants Bank
Total Risk-based Capital to Risk-weighted Assets, Amount
Actual	$ 739,793	$ 653,169
Prompt Corrective Action Thresholds, Adequate Capital	423,242	356,884
Prompt Corrective Action Thresholds, Well Capitalized	529,052	446,105
Tier 1 Capital to Risk-weighted Assets, Amount
Actual	677,340	597,305
Prompt Corrective Action Thresholds, Adequate Capital	317,431	178,442
Prompt Corrective Action Thresholds, Well Capitalized	423,242	267,663
Common Equity Tier One Capital to Risk-weighted Assets, Amount
Actual	677,340
Prompt Corrective Action Thresholds, Adequate Capital	238,074
Prompt Corrective Action Thresholds, Well Capitalized	343,884
Tier I Capital to Average Assets, Amount
Actual	677,340	597,305
Prompt Corrective Action Thresholds, Adequate Capital	241,423	226,339
Prompt Corrective Action Thresholds, Well Capitalized	$ 301,779	$ 282,953
Risk Based Ratios
Total Capital to Risk-weighted Assets, Actual Ratio	13.98%	14.64%
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 I Capital to Risk-weighted Assets, Actual Ratio	12.80%	13.39%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequate Capital Ratio	6.00%	4.00%
Tier I Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	8.00%	6.00%
Common Equity Tier 1 Capital to Risk-weighted Assets, Actual Ratio	12.80%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Adequately Capitalized Ratio	4.50%
Common Equity Tier 1 Capital to Risk-weighted Assets, Prompt Corrective Action Thresholds, Well Capitalized Ratio	6.50%
Leverage Ratios
Tier I Capital to Average Assets, Actual Ratio	11.22%	10.56%
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%

Loan Servicing (Details)

Loan Servicing (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Unpaid balance of loans serviced for others	$ 312,204	$ 254,223	$ 271,871

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
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		$ 2,270,000	$ 2,177,000	$ 1,773,000
Options granted (in shares)		0
Estimated pre-vesting forfeiture rate (as a percent)		5.50%
Weighted-average grant date fair value for stock options (in dollars per share)			$ 8.13	$ 5.73
Aggregate intrinsic value of stock options exercised		$ 921,000	$ 392,000
Stock options exercised		1,461,000	$ 504,000	$ 115,000
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%
Estimated pre-vesting forfeiture rate (as a percent)			5.46%	4.73%
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	3,269,000	$ 3,269,000
Unrecognized compensation expense expected recognition period		1 year 3 months 10 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 - Assu

Share-Based Compensation - Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture rate	5.50%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		2.41%	1.25%
Expected price volatility		45.05%	45.68%
Dividend yield		2.73%	2.96%
Forfeiture rate		5.46%	4.73%
Weighted-average expected life, until exercise		7 years 8 months 26 days	7 years 3 months 7 days

Share-Based Compensation - Comp

Share-Based Compensation - Components of Awards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 2,270	$ 2,177	$ 1,773
Income tax expense (benefit)	(745)	(726)	(547)
Total share-based compensation expense, net of income taxes	1,525	1,451	1,226
Stock and ESPP Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	101	237	253
Income tax expense (benefit)	4	(47)	(16)
Total share-based compensation expense, net of income taxes	105	190	237
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	2,169	1,940	1,520
Income tax expense (benefit)	(749)	(679)	(531)
Total share-based compensation expense, net of income taxes	$ 1,420	$ 1,261	$ 989

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Beginning balance (in shares)	737,931
Exercised (in shares)	(96,066)
Canceled (in shares)	(199,853)
Ending balance (in shares)	442,012	737,931
Vested and Expected to Vest, Number of Shares	442,012
Exercisable, Number of Shares	442,012
Weighted-Average Exercise Price
Beginning balance (in dollars per share)	$ 20.99	$ 21.32
Exercised (in dollars per share)	15.21
Canceled (in dollars per share)	25.99
Ending balance (in dollars per share)	19.99	$ 20.99
Vested and Expected to Vest, Weighted-Average Exercise Price (in dollars per share)	19.99
Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 19.99
Weighted Average Remaining Contractual Term
Outstanding	3 years 1 month 10 days
Vested and Expected to Vest	3 years 1 month 10 days
Exercisable	3 years 1 month 10 days
Aggregate Intrinsic Value
Outstanding	$ 2,599,319
Vested and Expected to Vest	2,599,319
Exercisable	$ 2,599,319

Share-Based Compensation - Unve

Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	385,450
Granted (in shares) | shares	125,050
Forfeited (in shares) | shares	(6,419)
Vested (in shares) | shares	(149,577)
Unvested RSAs, Ending Balance (in shares) | shares	354,504
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 15.65
Granted (in dollars per share) | $ / shares	23.48
Forfeited (in dollars per share) | $ / shares	17.99
Vested (in dollars per share) | $ / shares	11.88
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 19.65

Pension and Other Post Retir122

Pension and Other Post Retirement Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	Nov. 20, 2015	Mar. 01, 2005	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Percentage of employees covered by plan			20.00%
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)			4.50%	4.00%	4.80%
Defined benefit plan liability				$ 7,645
Accumulated benefit obligation			$ 71,747	80,650
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			$ 3,526	3,396	$ 3,138
Obligations payable			1,403	1,811
Post retirement plan expense			(127)	97	519
Fair value of plan assets			71,396	77,139	$ 69,871
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			52,433	57,413
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			$ 18,963	$ 19,726
Ameriana | Pentegra Plan
Defined Benefit Plan Disclosure [Line Items]
Written notice of withdrawal, period	60 days
Defined benefit plan liability	$ 5,435
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			9 years 15 days	9 years 7 months 3 days
Weighted Average | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Maturities of debt securities			4 years 5 months 20 days	5 years 7 days

Pension and Other Post Retir123

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, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 80,650	$ 62,270
Service cost	55	73	$ 131
Interest cost	3,087	3,235	2,670
Actuarial loss (gain)	(5,617)	12,968
Benefits paid	$ (6,428)	(5,541)
Net transfers in from CFS acquisition		7,645
Benefit obligation at end of year	$ 71,747	80,650	62,270
Change in Plan Assets:
Fair value of plan assets at beginning of year	77,139	69,871
Actual return on plan assets	153	5,232
Employer contributions	532	504
Benefits paid	$ (6,428)	(5,541)
CFS acquisition		7,073
End of year	$ 71,396	77,139	$ 69,871
Funded status at end of year	(351)	(3,511)
Assets and Liabilities Recognized in the Balance Sheets:
Deferred tax asset	7,461	8,541
Assets	4,006	1,329
Liabilities	4,357	4,840
Amounts Recognized in Accumulated Other Comprehensive Income Not Yet Recognized as Components of Net Periodic (Benefit) Cost Consist of:
Accumulated loss	(13,857)	(15,863)
Prior service credit	(305)	(346)
Total	$ (14,162)	$ (16,209)

Pension and Other Post Retir124

Pension and Other Post Retirement Benefit Plans - Schedule of Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Projected benefit obligation	$ 4,357	$ 4,840
Accumulated benefit obligation	$ 4,357	$ 4,840
Fair value of plan assets

Pension and Other Post Retir125

Pension and Other Post Retirement Benefit Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 55	$ 73	$ 131
Interest cost	3,087	3,235	2,670
Expected return on plan assets	(4,471)	(4,467)	(4,265)
Amortization of prior service costs	64	81	25
Amortization of net loss	1,722	478	2,131
Net periodic pension (benefit) cost	$ 457	$ (600)	$ 692

Pension and Other Post Retir126

Pension and Other Post Retirement Benefit Plans - Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit) cost	$ 457	$ (600)	$ 692
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit) cost	457	(600)	692
Net gain (loss)	1,299	(12,203)	11,942
Amortization of loss	1,722	478	2,131
Amortization of prior service cost	64	81	25
Total recognized in other comprehensive income (loss)	3,085	(11,644)	14,098
Total recognized in net periodic pension cost and other comprehensive income (loss)	$ 2,628	$ (11,044)	$ 13,406

Pension and Other Post Retir127

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, 2015	Dec. 31, 2014	Dec. 31, 2013
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	$ (1,505)	$ (1,770)	$ (533)
Amortization of prior service cost	(61)	(64)	(25)
Total	$ (1,566)	$ (1,834)	$ (558)

Pension and Other Post Retir128

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, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted-average Assumptions Used to Determine Benefit Obligation:
Discount rate	4.50%	4.00%	4.80%
Rate of compensation increase for accruing active participants	3.00%	3.00%	3.00%
Weighted-average Assumptions Used to Determine Cost:
Discount rate	4.00%	4.80%	4.00%
Expected return on plan assets	6.00%	6.00%	7.00%
Rate of compensation increase for accruing active participants	3.00%	3.00%	3.00%

Pension and Other Post Retir129

Pension and Other Post Retirement Benefit Plans - Schedule of Expected Future Benefit Payments (Details)	12 Months Ended
	Dec. 31, 2015USD ($)
Compensation and Retirement Disclosure [Abstract]
Minimum required contribution in 2016	$ 0
2,016	4,814,000
2,017	4,729,000
2,018	4,657,000
2,019	4,838,000
2,020	4,772,000
After 2,020	24,440,000
Total	$ 48,250,000

Pension and Other Post Retir130

Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Category (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
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)	2.20%	2.60%
Target (as a percent)	2.00%	2.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	58.10%	58.70%
Target (as a percent)	60.00%	60.00%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	37.40%	36.50%
Target (as a percent)	36.00%	36.00%
Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Actual (as a percent)	2.30%	2.20%
Target (as a percent)	2.00%	2.00%

Pension and Other Post Retir131

Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Level (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 71,396	$ 77,139	$ 69,871
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	52,433	57,413
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	1,608	2,032
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	9,113	9,384
Quoted Prices in Active Markets for Identical Assets (Level 1) | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,538	1,376
Quoted Prices in Active Markets for Identical Assets (Level 1) | Taxable Bond
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,536	4,987
Quoted Prices in Active Markets for Identical Assets (Level 1) | Large Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,528	21,185
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mid Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,537	9,434
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,578	3,872
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,353	3,474
Quoted Prices in Active Markets for Identical Assets (Level 1) | Specialty Alternative Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,642	1,669
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,963	19,726
Significant Other Observable Inputs (Level 2) | Government Agency and Municipal Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,993	8,252
Significant Other Observable Inputs (Level 2) | Certificates of Deposit
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,511	1,001
Significant Other Observable Inputs (Level 2) | Common Bond Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,647	4,615
Significant Other Observable Inputs (Level 2) | Common Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 5,812	$ 5,858
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	$ 71,396	$ 77,139
Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,608	2,032
Fair Value | Corporate Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	9,113	9,384
Fair Value | Government Agency and Municipal Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6,993	8,252
Fair Value | Certificates of Deposit
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,511	1,001
Fair Value | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,538	1,376
Fair Value | Common Bond Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,647	4,615
Fair Value | Common Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,812	5,858
Fair Value | Taxable Bond
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,536	4,987
Fair Value | Large Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,528	21,185
Fair Value | Mid Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,537	9,434
Fair Value | Small Cap Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,578	3,872
Fair Value | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	3,353	3,474
Fair Value | Specialty Alternative Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 1,642	$ 1,669

Income Tax - Reconciliation of

Income Tax - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Currently Payable:
Federal									$ 21,221	$ 7,075	$ 13,737
Deferred:
Federal									3,952	14,538	$ 2,147
State									492	510
Total Income Tax Expense	$ 4,418	$ 6,557	$ 8,856	$ 5,834	$ 5,638	$ 5,980	$ 5,888	$ 4,617	25,665	22,123	$ 15,884
Reconciliation of Federal Statutory to Actual Tax Expense:
Federal Statutory Income Tax at 35%									31,867	28,800	21,145
Tax-exempt Interest Income									(7,083)	$ (5,148)	$ (3,923)
Basis Difference on Sale of Insurance Subsidiary									2,252
Stock Compensation									34	$ 36	$ 50
Earnings on Life Insurance									(1,012)	(1,271)	(905)
Tax Credits									(583)	(911)	(857)
Other									190	617	374
Total Income Tax Expense	$ 4,418	$ 6,557	$ 8,856	$ 5,834	$ 5,638	$ 5,980	$ 5,888	$ 4,617	$ 25,665	$ 22,123	$ 15,884
Federal statutory income tax rate									35.00%	35.00%	35.00%

Income Tax - Narrative (Details

Income Tax - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation Allowance [Line Items]
Tax expense applicable to security gains and losses, including unrealized losses relating to other-than-temporary charges	$ 435	$ 760	$ 157
Increase (decrease) in deferred tax assets	4,163
Valuation allowance	15,736	17,568	$ 17,171
Additional paid-in capital	504,530	$ 431,220
Unrecorded deferred tax liability	8,847
Merger with Ameriana Bancorp
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax assets	9,262
Additional paid-in capital	11,883
Merger with CFS Bancorp, Inc.
Valuation Allowance [Line Items]
Additional paid-in capital	13,393
State and Local Jurisdiction
Valuation Allowance [Line Items]
Valuation allowance	15,736
State tax loss carryforward	121,626
Valuation allowance on state loss carryforward	120,369
Available for Sale Securities
Valuation Allowance [Line Items]
Decrease in deferred tax liability	955
Deferred Compensation
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax assets	(857)
Loans
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax assets	(1,873)
Operating Loss Carryforwards | Federal
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax assets	(1,662)
Allowance for Loan Losses
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax assets	$ (789)

Income Tax - Deferred Tax Asset

Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Assets:
Differences in Accounting for Loan Losses	$ 25,867	$ 26,665
Differences in Accounting for Loan Fees	762	747
Differences in Accounting for Loans and Securities	9,359	9,910
Deferred Compensation	5,100	5,234
Difference in Accounting for Pensions and Other Employee Benefits	2,247	1,084
Federal & State Income Tax Loss Carryforward and Credits	23,737	23,977
Other	9,310	8,535
Total Assets	76,382	76,152
Liabilities:
Differences in Depreciation Methods	7,742	8,220
State Income Tax	591	591
Net Unrealized Gain on Securities Available for Sale	6,636	7,591
Gain on FDIC Modified Whole Bank Transaction	1,405	1,694
Other	717	1,096
Total Liabilities	17,091	19,192
Net Deferred Tax Asset Before Valuation Allowance	59,291	56,960
Valuation allowance:
Beginning Balance	(17,568)	(17,171)
Decrease/(Increase) During the Year	1,832	(397)
Ending Balance	(15,736)	(17,568)
Net Deferred Tax Asset	$ 43,555	$ 39,392

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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 15,260	$ 16,122	$ 15,160	$ 13,620	$ 65,384	$ 60,162	$ 44,530
Preferred stock dividends											(2,380)
Net income available to common stockholders									$ 65,384	$ 60,162	42,150
Net income available to common stockholders									$ 65,384	$ 60,162	$ 42,150
Weighted-Average Shares
Net income available to common stockholders (in shares)	37,908,873	37,850,827	37,793,448	37,709,883	37,018,014	36,054,867	36,026,763	35,956,436	37,816,399	36,266,356	29,731,420
Effect of dilutive stock options and warrants (in shares)									271,834	288,253	276,960
Net income available to common stockholders (in shares)	38,190,694	38,118,199	38,043,359	38,000,074	37,323,276	36,328,981	36,294,149	36,260,624	38,088,233	36,554,609	30,008,380
Basic net income per share:
Net income available to common stockholders (in dollars per share)	$ 0.37	$ 0.46	$ 0.47	$ 0.43	$ 0.41	$ 0.45	$ 0.42	$ 0.38	$ 1.73	$ 1.66	$ 1.42
Diluted net income per share:
Net income available to common stockholders (in dollars per share)	$ 0.37	$ 0.45	$ 0.47	$ 0.43	$ 0.41	$ 0.45	$ 0.41	$ 0.38	$ 1.72	$ 1.65	$ 1.41

Net Income Per Share - Narrativ

Net Income Per Share - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Stock options not included in the earnings per share calculation (in shares)	286,119	543,514	800,674
Weighted average exercise price (in dollars per share)	$ 19.99	$ 20.99	$ 21.32

Quarterly Results of Operati137

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 56,514	$ 56,538	$ 55,202	$ 52,944	$ 53,053	$ 53,290	$ 51,527	$ 51,009	$ 221,198	$ 208,879	$ 170,834
Interest expense	6,440	6,215	6,171	5,968	5,893	5,424	5,408	5,117	24,794	21,842	16,569
NET INTEREST INCOME	$ 50,074	$ 50,323	49,031	$ 46,976	47,160	47,866	$ 46,119	$ 45,892	196,404	187,037	154,265
Provision for loan losses			417		960	1,600			417	2,560	6,648
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	$ 50,074	$ 50,323	48,614	$ 46,976	46,200	46,266	$ 46,119	$ 45,892	195,987	184,477	147,617
Non-interest income	14,767	16,899	24,633	16,232	16,375	18,412	16,179	15,434	72,531	66,400	56,016
Non-interest expense	46,246	43,598	46,423	41,202	41,677	42,576	41,250	43,089	177,469	168,592	143,219
INCOME BEFORE INCOME TAX	18,595	23,624	26,824	22,006	20,898	22,102	21,048	18,237	91,049	82,285	60,414
Income tax expense	4,418	6,557	8,856	5,834	5,638	5,980	5,888	4,617	25,665	22,123	15,884
NET INCOME	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 15,260	$ 16,122	$ 15,160	$ 13,620	$ 65,384	$ 60,162	$ 44,530
Basic EPS (in dollars per share)	$ 0.37	$ 0.46	$ 0.47	$ 0.43	$ 0.41	$ 0.45	$ 0.42	$ 0.38	$ 1.73	$ 1.66	$ 1.42
Diluted EPS (in dollars per share)	$ 0.37	$ 0.45	$ 0.47	$ 0.43	$ 0.41	$ 0.45	$ 0.41	$ 0.38	$ 1.72	$ 1.65	$ 1.41
Average Shares Outstanding:
Basic (in shares)	37,908,873	37,850,827	37,793,448	37,709,883	37,018,014	36,054,867	36,026,763	35,956,436	37,816,399	36,266,356	29,731,420
Diluted (in shares)	38,190,694	38,118,199	38,043,359	38,000,074	37,323,276	36,328,981	36,294,149	36,260,624	38,088,233	36,554,609	30,008,380

Condensed Financial Informat138

Condensed Financial Information (parent company only) - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Goodwill	$ 243,129	$ 202,724	$ 188,948
Other assets	24,023	20,764
TOTAL ASSETS	6,761,003	5,824,127
Liabilities
Borrowings	568,544	411,994
Other liabilities	49,211	41,411
Total Liabilities	5,910,494	5,097,300
Stockholders' equity	850,509	726,827	$ 634,923	$ 552,236
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	6,761,003	5,824,127
Parent
Assets
Cash	43,622	36,044
Investment in subsidiaries	932,372	820,123
Goodwill	448	448
Other assets	9,668	6,281
TOTAL ASSETS	986,110	862,896
Liabilities
Borrowings	127,663	126,702
Other liabilities	7,938	9,367
Total Liabilities	135,601	136,069
Stockholders' equity	850,509	726,827
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 986,110	$ 862,896

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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income
Gain on the sale of insurance subsidiary									$ 8,265
Gain on cancellation of subordinated debentures									1,250
Other income									4,441	$ 6,438	$ 5,404
Expenses
Interest expense	$ 6,440	$ 6,215	$ 6,171	$ 5,968	$ 5,893	$ 5,424	$ 5,408	$ 5,117	24,794	21,842	16,569
Salaries and employee benefits									101,908	96,499	85,413
Other expenses									15,669	14,239	11,142
INCOME BEFORE INCOME TAX	18,595	23,624	26,824	22,006	20,898	22,102	21,048	18,237	91,049	82,285	60,414
Income tax benefit (expense)	(4,418)	(6,557)	(8,856)	(5,834)	(5,638)	(5,980)	(5,888)	(4,617)	(25,665)	(22,123)	(15,884)
NET INCOME	14,177	17,067	17,968	16,172	15,260	16,122	15,160	13,620	$ 65,384	$ 60,162	44,530
Preferred stock dividends and discount accretion											(2,380)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									$ 65,384	$ 60,162	42,150
Net income	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 15,260	$ 16,122	$ 15,160	$ 13,620	65,384	60,162	44,530
Other comprehensive income (loss)									268	4,780	(911)
Comprehensive income									65,652	64,942	43,619
Parent
Income
Dividends from subsidiaries									39,032	$ 53,231	$ 63,732
Gain on the sale of insurance subsidiary									8,265
Gain on cancellation of subordinated debentures									1,250
Other income									197	$ 538	$ 45
Total income									48,744	53,769	63,777
Expenses
Interest expense									6,661	6,616	3,531
Salaries and employee benefits									3,023	3,128	3,284
Net occupancy and equipment expenses									464	442	258
Other outside services									1,455	458	1,141
Professional services									636	409	648
Other expenses									1,234	1,132	870
Total expenses									13,473	12,185	9,732
INCOME BEFORE INCOME TAX									35,271	41,584	54,045
Income tax benefit (expense)									(974)	3,999	3,153
Income before equity in undistributed income of subsidiaries									34,297	45,583	57,198
Equity in undistributed (distributions in excess of) income of subsidiaries									31,087	14,579	(12,668)
NET INCOME									$ 65,384	$ 60,162	44,530
Preferred stock dividends and discount accretion											(2,380)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS									$ 65,384	$ 60,162	42,150
Net income									65,384	60,162	44,530
Other comprehensive income (loss)									268	4,780	(911)
Comprehensive income									$ 65,652	$ 64,942	$ 43,619

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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow From Operating Activities:
Net income	$ 14,177	$ 17,067	$ 17,968	$ 16,172	$ 15,260	$ 16,122	$ 15,160	$ 13,620	$ 65,384	$ 60,162	$ 44,530
Adjustments to Reconcile Net Income to Net Cash:
Share-based compensation									2,270	$ 2,177	$ 1,773
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									56,660	$ 75,840	$ 183,131
Cash Flows from Investing Activities:
Net cash paid in acquisition									(7,936)	(10,084)	10,992
Other									9	5,889	(2,768)
Net cash used in investing activities									(340,391)	(125,991)	(138,162)
Cash Flows from Financing Activities:
Repayment of borrowings									$ (370,813)	$ (789,563)	(163,838)
Preferred stock redemption under small business lending fund											(90,783)
Stock issued under employee benefit plans									$ 460	$ 478	479
Stock issued under dividend reinvestment and stock purchase plan									661	523	325
Stock options exercised									1,461	504	115
Stock redeemed									(1,640)	(1,067)	(491)
Net cash provided by (used in) financing activities									267,285	59,333	(36,995)
Cash and Cash Equivalents, beginning of the year				118,616				109,434	118,616	109,434	101,460
Cash and Cash Equivalents, end of year	102,170				118,616				102,170	118,616	109,434
Parent
Cash Flow From Operating Activities:
Net income									65,384	60,162	44,530
Adjustments to Reconcile Net Income to Net Cash:
Share-based compensation									843	887	778
Distributions in excess of (equity in undistributed) income of subsidiaries									(31,087)	$ (14,579)	$ 12,668
Gain on sale of insurance subsidiary									(8,265)
Gain on cancellation of subordinated debentures									(1,250)
Net Change in:
Other assets									(441)	$ 2,425	$ (1,354)
Other liabilities									(1,486)	1,466	(8,438)
Investment in subsidiaries - operating activities									197	(4,517)	12,991
Net cash provided by operating activities									23,895	45,844	$ 61,175
Cash Flows from Investing Activities:
Net cash paid in acquisition									(14,500)	$ (12,832)
Proceeds from business divestitures									16,000
Other									575		$ 240
Net cash used in investing activities									2,075	$ (12,832)	240
Cash Flows from Financing Activities:
Cash dividends									(15,654)	$ (10,694)	(7,992)
Repayment of borrowings									$ (3,750)		(55,000)
Proceeds from issuance of long-term debt											70,000
Preferred stock redemption under small business lending fund											(90,783)
Stock issued under employee benefit plans									$ 460	$ 478	479
Stock issued under dividend reinvestment and stock purchase plan									661	523	325
Stock options exercised									1,531	564	115
Stock redeemed									(1,640)	(1,067)	(491)
Net cash provided by (used in) financing activities									(18,392)	(10,196)	(83,347)
Cash and Cash Equivalents, beginning of the year				$ 36,044				$ 13,228	36,044	13,228	35,160
Cash and Cash Equivalents, end of year	$ 43,622				$ 36,044				$ 43,622	$ 36,044	$ 13,228

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event	Feb. 09, 2016USD ($)
Subsequent Event [Line Items]
Stock repurchase program, approved amount	$ 15,000,000
Stock repurchase program, percentage of total shares outstanding	1.70%