First Merchants (FRME) 10-Q 10 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	FIRST MERCHANTS CORP
Entity Central Index Key	712,534
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Trading Symbol	FRME
Amendment Flag	false
Entity Common Stock, Shares Outstanding		41,054,388

CONSOLIDATED CONDENSED BALANCE

CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 104,247	$ 127,927
Interest-bearing time deposits	20,439	24,459
Investment securities available for sale	730,788	696,862
Investment securities held to maturity (fair value of $602,091 and $611,933)	596,429	607,643
Loans held for sale	1,262	2,929
Loans, net of allowance for loan losses of $68,225 and $66,037	5,206,684	5,073,608
Premises and equipment	91,311	94,432
Federal Reserve and Federal Home Loan Bank stock	17,964	17,964
Interest receivable	25,174	26,194
Core deposit intangibles	13,963	14,866
Goodwill	244,000	244,000
Cash surrender value of life insurance	202,574	201,671
Other real estate owned	8,293	8,966
Tax asset, deferred and receivable	32,074	39,384
Other assets	30,991	30,706
TOTAL ASSETS	7,326,193	7,211,611
Deposits:
Noninterest-bearing	1,373,778	1,348,267
Interest-bearing	4,261,531	4,208,231
Total Deposits	5,635,309	5,556,498
Borrowings:
Federal funds purchased	102,000	120,349
Securities sold under repurchase agreements	139,007	146,480
Federal Home Loan Bank advances	338,919	298,923
Subordinated debentures and term loans	128,862	128,445
Total Borrowings	708,788	694,197
Interest payable	3,875	3,110
Other liabilities	48,751	56,149
Total Liabilities	6,396,723	6,309,954
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 - 41,047,543 and 40,912,697 shares	5,131	5,114
Additional paid-in capital	509,953	509,018
Retained earnings	417,983	400,981
Accumulated other comprehensive income (loss)	(3,722)	(13,581)
Total Stockholders' Equity	929,470	901,657
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 7,326,193	$ 7,211,611

CONSOLIDATED CONDENSED BALANCE3

CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Investment securities held to maturity - fair value	$ 602,091	$ 611,933
Loans - allowance for loan losses	$ 68,225	$ 66,037
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, authorized (in shares)	600	600
Preferred Stock, issued (in shares)	125	125
Preferred Stock, outstanding (in shares)	125	125
Common Stock, stated value (in dollars per share)	$ 0.125	$ 0.125
Common Stock, authorized (in shares)	50,000,000	50,000,000
Common Stock, issued (in shares)	41,047,543	40,912,697
Common Stock, outstanding (in shares)	41,047,543	40,912,697

CONSOLIDATED CONDENSED STATEMEN

CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Loans receivable:
Taxable	$ 56,357	$ 50,489
Tax exempt	2,333	1,315
Investment securities:
Taxable	4,308	4,328
Tax exempt	5,003	4,509
Deposits with financial institutions	44	106
Federal Reserve and Federal Home Loan Bank stock	189	480
Total Interest Income	68,234	61,227
INTEREST EXPENSE
Deposits	4,124	4,063
Federal funds purchased	228	28
Securities sold under repurchase agreements	88	100
Federal Home Loan Bank advances	978	796
Subordinated debentures and term loans	1,817	1,785
Total Interest Expense	7,235	6,772
NET INTEREST INCOME	60,999	54,455
Provision for loan losses	2,385	550
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	58,614	53,905
OTHER INCOME
Service charges on deposit accounts	4,174	4,145
Fiduciary activities	2,640	2,494
Other customer fees	4,863	5,059
Earnings on cash surrender value of life insurance	898	1,476
Net gains and fees on sales of loans	1,275	1,460
Net realized gains on sales of available for sale securities	598	997
Other income	398	206
Total Other Income	14,846	15,837
OTHER EXPENSES
Salaries and employee benefits	25,732	27,337
Net occupancy	4,216	4,022
Equipment	2,807	3,238
Marketing	565	737
Outside data processing fees	2,616	2,069
Printing and office supplies	264	364
Core deposit amortization	903	978
FDIC assessments	570	950
Other real estate owned and foreclosure expenses	531	751
Professional and other outside services	1,734	2,162
Other expenses	3,161	3,867
Total Other Expenses	43,099	46,475
INCOME BEFORE INCOME TAX	30,361	23,267
Income tax expense	7,168	5,574
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 23,193	$ 17,693
Per Share Data:
Basic Net Income Available to Common Stockholders (in dollars per share)	$ 0.57	$ 0.43
Diluted Net Income Available to Common Stockholders (in dollars per share)	0.56	0.43
Cash Dividends Paid (in dollars per share)	$ 0.15	$ 0.11
Average Diluted Shares Outstanding (in shares)	41,220,586	40,916,972

CONSOLIDATED CONDENSED STATEME5

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 23,193	$ 17,693
Other comprehensive income net of tax:
Unrealized holding gain on securities available for sale arising during the period, net of tax of $5,444 and $2,765	10,110	5,135
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $11 and $684	23	(1,270)
Reclassification adjustment for net gains included in net income, net of tax of $115 and $236	(215)	(437)
Defined benefit pension plan amortization of prior service cost, net of tax of $32	(59)
Period change	9,859	3,428
Comprehensive income	$ 33,052	$ 21,121

CONSOLIDATED CONDENSED STATEME6

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Unrealized holding gain (loss) on securities available for sale arising during the period, tax	$ 5,444	$ 2,765
Unrealized gain (loss) on cash flow hedges arising during the period, tax	11	(684)
Reclassification adjustment for net losses (gains) included in net income, tax	115	236
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax	$ 32	$ 0

CONSOLIDATED CONDENSED STATEME7

CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2015						$ (1,362)
Comprehensive income
Net income	$ 17,693
Other comprehensive income, net of tax	3,428
Ending balance at Mar. 31, 2016						2,066
Beginning balance (in shares) at Dec. 31, 2016		125	40,912,697
Beginning balance at Dec. 31, 2016	901,657	$ 125	$ 5,114	$ 509,018	$ 400,981	(13,581)
Comprehensive income
Net income	23,193				23,193
Other comprehensive income, net of tax	9,859					9,859
Cash dividends on common stock ($.15 per share)	(6,191)				(6,191)
Share-based compensation (in shares)			76,951
Share-based compensation	573		$ 10	563
Stock issued under employee benefit plans (in shares)			3,453
Stock issued under employee benefit plans	114			114
Stock issued under dividend reinvestment and stock purchase plan (in shares)			4,973
Stock issued under dividend reinvestment and stock purchase plan	$ 205		$ 1	204
Stock options exercised (in shares)	80,835		80,835
Stock options exercised	$ 1,314		$ 10	1,304
Stock redeemed (in shares)			(31,366)
Stock redeemed	(1,254)		$ (4)	(1,250)
Ending balance (in shares) at Mar. 31, 2017		125	41,047,543
Ending balance at Mar. 31, 2017	$ 929,470	$ 125	$ 5,131	$ 509,953	$ 417,983	$ (3,722)

CONSOLIDATED CONDENSED STATEME8

CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in dollars per share)	$ 0.15	$ 0.11

CONSOLIDATED CONDENSED STATEME9

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flow From Operating Activities:
Net income	$ 23,193	$ 17,693
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,385	550
Depreciation and amortization	1,830	1,835
Change in deferred taxes	3,019	3,324
Share-based compensation	573	593
Loans originated for sale	(46,280)	(87,689)
Proceeds from sales of loans held for sale	48,903	93,955
Gains on sales of loans held for sale	(956)	(1,204)
Gains on sales of securities available for sale	(598)	(997)
Change in interest receivable	1,020	1,579
Change in interest payable	765	818
Other adjustments	1,474	(5,661)
Net cash provided by operating activities	35,328	24,796
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	4,020	(45,138)
Purchases of:
Securities available for sale	(68,819)	(32,632)
Securities held to maturity	(7,438)	(35,086)
Proceeds from sales of securities available for sale	26,169	69,623
Proceeds from maturities of:
Securities available for sale	15,374	13,137
Securities held to maturity	18,076	19,134
Change in Federal Reserve and Federal Home Loan Bank stock		80
Net change in loans	(136,141)	(20,235)
Proceeds from the sale of other real estate owned	1,228	2,084
Other adjustments	1,291	(1,226)
Net cash used in investing activities	(146,240)	(30,259)
Net change in :
Demand and savings deposits	(1,047)	44,902
Certificates of deposit and other time deposits	79,858	(24,650)
Borrowings	480,059	110,060
Repayment of borrowings	(465,826)	(136,321)
Cash dividends on common stock	(6,191)	(4,509)
Stock issued under employee benefit plans	114	119
Stock issued under dividend reinvestment and stock purchase plans	205	165
Stock options exercised	1,314	73
Stock redeemed	(1,254)	(808)
Net cash provided by (used in) financing activities	87,232	(10,969)
Net Change in Cash and Cash Equivalents	(23,680)	(16,432)
Cash and Cash Equivalents at beginning of period	127,927	102,170
Cash and Cash Equivalents at end of period	104,247	85,738
Additional cash flow information:
Interest paid	6,470	5,954
Income tax paid		3,500
Loans transferred to other real estate owned	680	32
Fixed assets transferred to other real estate owned		360
Non-cash investing activities using trade date accounting	$ 8,162	$ 19,935

General

General	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	GENERAL Financial Statement Preparation The significant accounting policies followed by the Corporation and its wholly owned subsidiaries for interim financial reporting are consistent with the accounting policies followed for annual financial reporting. All adjustments, which are of a normal recurring nature and are in the opinion of management necessary for a fair statement of the results for the periods reported, have been included in the accompanying consolidated condensed financial statements. The Consolidated Condensed Balance Sheet of the Corporation as of December 31, 2016 , has been derived from the audited consolidated balance sheet of the Corporation as of that date. Certain information and note disclosures normally included in the Corporation’s annual financial statements, prepared in accordance with accounting principles generally accepted in the United States of America, have been condensed or omitted. These consolidated condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2016 filed with the Securities and Exchange Commission. The results of operations for the three months ended March 31, 2017 , are not necessarily indicative of the results to be expected for the year. 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

Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Ameriana Bancorp, Inc. On December 31, 2015, the Corporation acquired 100 percent of Ameriana. Ameriana merged with and into the Corporation (the "Ameriana Merger") whereupon the separate corporate existence of Ameriana ceased and the Corporation survived. Immediately following the Ameriana Merger, Ameriana Bank, an Indiana bank and wholly-owned subsidiary of Ameriana, merged with and into the Bank, with the Bank continuing as the surviving bank. Ameriana was headquartered in New Castle, Indiana and had 13 banking centers serving central and east central Indiana. Pursuant to the merger agreement, each Ameriana shareholder received 0.9037 shares of the Corporation's 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 synergies and economies of scale. Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 61,754 Loans 316,929 Premises and equipment 13,946 Federal Home Loan Bank stock 2,693 Other real estate owned 5,613 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 6,713 Deposits (383,718 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,884 ) Subordinated debentures (5,487 ) Other liabilities (9,451 ) Net tangible assets acquired 26,436 Core deposit intangible 5,342 Goodwill 38,624 Purchase price $ 70,402 Of the total purchase price, $5,342,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The remaining purchase price has been allocated to goodwill, which is not deductible for tax purposes. CONSUMMATION OF MERGERS The Arlington Bank Merger On January 25, 2017, the Corporation, the Bank and The Arlington Bank, an Ohio savings bank ("Arlington Bank"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which Arlington Bank will, subject to the terms and conditions of the merger agreement, merge with and into the Bank, whereupon the separate corporate existence of Arlington Bank will cease and the Bank will survive. Based on the closing price of the Corporation's common stock on January 24, 2017 of $36.46 per share, the transaction value is estimated at approximately $75.8 million . The transaction is expected to be a tax-free stock exchange for Arlington Bank's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to Arlington Bank's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the second quarter of 2017. Arlington Bank's total assets as of March 31, 2017 were $292 million . Independent Alliance Banks, Inc. Merger On February 17, 2017, the Corporation and Independent Alliance Banks, Inc., an Indiana corporation ("IALB"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which IALB will, subject to the terms and conditions of the merger agreement, merge with and into the Corporation, whereupon the separate corporate existence of IALB will cease and the Corporation will survive. Immediately following the merger, IALB's wholly-owned subsidiary, iAB Financial Bank, shall be merged with and into the Bank, with the Bank continuing as the surviving bank. On November 21, 2016, the Corporation purchased 495,112 shares or 12.1 percent of IALB's outstanding common stock from an IALB shareholder for $19.8 million . Based on the closing price of the Corporation's common stock on February 16, 2017 of $42.10 per share, the transaction value for the remaining shares of common stock, not owned by the Corporation, is approximately $251.3 million . The transaction is expected to be a tax-free stock exchange for IALB's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to IALB's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the third quarter of 2017. IALB's total assets as of March 31, 2017 were $1.1 billion .

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2017
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 Gross Gross Fair Available for sale at March 31, 2017 U.S. Treasury $ 747 $ 747 State and municipal 368,545 $ 9,345 $ 4,153 373,737 U.S. Government-sponsored mortgage-backed securities 323,912 1,736 2,949 322,699 Corporate obligations 31 31 Equity securities 21,820 11,754 33,574 Total available for sale 715,055 22,835 7,102 730,788 Held to maturity at March 31, 2017 U.S. Government-sponsored agency securities 22,618 458 22,160 State and municipal 231,129 4,096 1,386 233,839 U.S. Government-sponsored mortgage-backed securities 342,682 4,941 1,531 346,092 Total held to maturity 596,429 9,037 3,375 602,091 Total Investment Securities $ 1,311,484 $ 31,872 $ 10,477 $ 1,332,879 Amortized Gross Gross Fair Available for sale at December 31, 2016 U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 360,779 $ 8,443 $ 5,564 363,658 U.S. Government-sponsored mortgage-backed securities 313,459 1,904 3,071 312,292 Corporate obligations 31 31 Equity securities 21,820 1,039 20,781 Total available for sale 696,189 10,347 9,674 696,862 Held to maturity at December 31, 2016 U.S. Government-sponsored agency securities 22,619 479 22,140 State and municipal 224,811 3,136 1,796 226,151 U.S. Government-sponsored mortgage-backed securities 360,213 4,956 1,527 363,642 Total held to maturity 607,643 8,092 3,802 611,933 Total Investment Securities $ 1,303,832 $ 18,439 $ 13,476 $ 1,308,795 The amortized cost and fair value of available for sale and held to maturity securities at March 31, 2017 and December 31, 2016 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at March 31, 2017: Due in one year or less $ 3,604 $ 3,643 $ 4,771 $ 4,825 Due after one through five years 10,687 11,260 70,442 71,687 Due after five through ten years 57,708 59,851 51,387 51,438 Due after ten years 297,324 299,761 127,147 128,049 $ 369,323 $ 374,515 $ 253,747 $ 255,999 U.S. Government-sponsored mortgage-backed securities 323,912 322,699 342,682 346,092 Equity securities 21,820 33,574 Total Investment Securities $ 715,055 $ 730,788 $ 596,429 $ 602,091 Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at December 31, 2016 Due in one year or less $ 2,703 $ 2,717 $ 2,046 $ 2,047 Due after one through five years 16,359 17,068 61,921 63,193 Due after five through ten years 60,614 62,241 61,606 61,145 Due after ten years 281,234 281,763 121,857 121,906 $ 360,910 $ 363,789 $ 247,430 $ 248,291 U.S. Government-sponsored mortgage-backed securities 313,459 312,292 360,213 363,642 Equity securities 21,820 20,781 Total Investment Securities $ 696,189 $ 696,862 $ 607,643 $ 611,933 The carrying value of securities pledged as collateral, to secure borrowings and for other purposes, was $551,860,000 at March 31, 2017 , and $572,896,000 at December 31, 2016 . The book value of securities sold under agreements to repurchase amounted to $138,657,000 at March 31, 2017 , and $145,936,000 at December 31, 2016 . Gross gains on the sales and redemptions of available for sale securities for the three months ended March 31, 2017 and 2016 are shown below. Three Months Ended 2017 2016 Sales and Redemptions of Available for Sale Securities: Gross gains $ 598 $ 997 Gross losses 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 March 31, 2017 , and December 31, 2016 : Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at March 31, 2017 State and municipal $ 109,641 $ 4,153 $ 109,641 $ 4,153 U.S. Government-sponsored mortgage-backed securities 183,878 2,949 183,878 2,949 Total Temporarily Impaired Available for Sale Securities 293,519 7,102 293,519 7,102 Temporarily Impaired Held to Maturity Securities at March 31, 2017 Federal agencies 22,160 458 22,160 458 State and municipal 36,582 1,386 36,582 1,386 U.S. Government-sponsored mortgage-backed securities 108,696 1,531 108,696 1,531 Total Temporarily Impaired Held to Maturity Securities 167,438 3,375 167,438 3,375 Total Temporarily Impaired Investment Securities $ 460,957 $ 10,477 $ 460,957 $ 10,477 Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2016 State and municipal $ 126,593 $ 5,564 $ 126,593 $ 5,564 U.S. Government-sponsored mortgage-backed securities 185,544 3,071 185,544 3,071 Equity Securities 18,765 1,039 18,765 1,039 Total Temporarily Impaired Available for Sale Securities 330,902 9,674 330,902 9,674 Temporarily Impaired Held to Maturity Securities at December 31, 2016 U.S. Government-sponsored agency securities 19,121 479 19,121 479 State and municipal 50,897 1,796 50,897 1,796 U.S. Government-sponsored mortgage-backed securities 109,377 1,527 109,377 1,527 Total Temporarily Impaired Held to Maturity Securities 179,395 3,802 179,395 3,802 Total Temporarily Impaired Investment Securities $ 510,297 $ 13,476 $ 510,297 $ 13,476 Certain investments in debt and equity securities are reported in the financial statements at an amount less than their historical cost as indicated in the table below. March 31, 2017 December 31, 2016 Investments reported at less than historical cost: Historical cost $ 471,434 $ 523,773 Fair value $ 460,957 $ 510,297 Percent of the Corporation's available for sale and held to maturity portfolio 34.7 % 39.1 % Except as discussed below, management believes the decline in fair value for these securities was temporary. Should the impairment of any of these securities become other-than-temporary, the cost basis of the investment will be reduced and the resulting loss recognized in net income during the period the OTTI is identified. The Corporation’s management has evaluated all securities with unrealized losses for other-than temporary impairment as of March 31, 2017 . 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 1 and Level 2 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 was classifying 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 losses resulting from the sale of certain securities has proven the data to be accurate over time. The 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. 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 March 31, 2017 . The state and political subdivision securities portfolio contains unrealized losses of $4,153,000 on eighty-three securities and $1,386,000 on fifty-one securities in the available for sale and held to maturity portfolios, respectively. 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 March 31, 2017 . The mortgage-backed securities portfolio contains unrealized losses of $2,949,000 on forty-five securities and $1,531,000 on thirty-one securities in the available for sale and held to maturity portfolios, respectively. All these securities are issued by a government-sponsored entity. U.S. Government-Sponsored Agency Securities The unrealized losses on the Corporation's investment in U.S. Government-Sponsored Agency securities were a result of interest rate changes. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. Because the Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Corporation does not consider those investments to be other-than-temporarily impaired at March 31, 2017 . The U.S. Government-Sponsored Agency securities portfolio contains no unrealized losses in the available for sale portfolio, and $458,000 on five securities in the held to maturity portfolio.

Loans and Allowance

Loans and Allowance	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans and Allowance	90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,255,950 $ 915 $ 1,975 $ 2,890 $ 1,258,840 Agriculture production financing and other loans to farmers 75,251 1,105 665 1,770 77,021 Real estate loans: Construction 336,027 833 71 904 336,931 Commercial and farmland 2,098,174 5,076 $ 645 14,536 20,257 2,118,431 Residential 725,168 2,836 630 9,284 12,750 737,918 Home equity 421,202 906 175 $ 101 1,324 2,506 423,708 Individuals' loans for household and other personal expenditures 77,175 285 43 22 65 415 77,590 Lease financing receivables, net of unearned income 261 261 Other commercial loans 244,209 244,209 Loans $ 5,233,417 $ 11,956 $ 1,493 $ 123 $ 27,920 $ 41,492 $ 5,274,909 December 31, 2016 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645 See the information regarding the analysis of loan loss experience in the "LOAN QUALITY/PROVISION FOR LOAN LOSSES" section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as ITEM 2 of this Quarterly Report on Form 10-Q. 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 works to maintain its relationship with certain customers who are experiencing financial difficulty by contractually modifying the borrower's debt agreement with the Corporation. In certain loan restructuring situations, the Corporation may grant a concession to a debtor experiencing financial difficulty, resulting in a trouble debt restructuring. A concession is deemed to be granted when, as a result of the restructuring, the Corporation does not expect to collect all original amounts due, including interest accrued at the original contract rate. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of the collateral is considered in determining whether the principal will be paid. The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods indicated: Three Months Ended March 31, 2017 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 107 $ 241 3 Residential 121 122 2 Home equity 122 Total $ 350 $ 363 5 Three Months Ended March 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 260 $ 260 3 Agriculture production financing and other loans to farmers 465 331 2 Real estate loans: Commercial and farmland 352 352 1 Residential 113 133 3 Individuals' loans for household and other personal expenditures 13 13 1 Total $ 1,203 $ 1,089 10 The following tables summarize the recorded investment of troubled debt restructurings as of March 31, 2017 and 2016 , by modification type, that occurred during the periods indicated: Three Months Ended March 31, 2017 Term Rate Combination Total Real estate loans: Commercial and farmland $ 241 $ 241 Residential $ 122 122 Total $ 122 $ 241 $ 363 Three Months Ended March 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 260 $ 260 Agriculture production financing and other loans to farmers $ 331 331 Real estate loans: Commercial and farmland 351 351 Residential 123 123 Individuals loans for household and other personal expenditures 13 13 Total $ 467 $ 611 $ 1,078 Loans secured by commercial and farmland real estate made up 66 percent of the post-modification balance of troubled debt restructured loans made in the three months ended March 31, 2017 . The following tables summarize troubled debt restructures that occurred during the twelve months ended March 31, 2017 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this discussion, a loan is considered in default if it is 30 or more days past due. Three Months Ended March 31, 2017 Number of Recorded Real estate loans: Commercial and farmland 1 $ 223 Total 1 $ 223 Three Months Ended March 31, 2016 Number of Recorded Commercial and industrial loans 3 $ 260 Real estate loans: Commercial and farmland 1 717 Total 4 $ 977 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 loan restructures are generally included in the general historical allowance for loan loss at the post modification balance. Consumer non-accrual and delinquent troubled debt loan restructures are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $1,104,000 and $1,530,000 at March 31, 2017 and December 31, 2016, respectively. Commercial troubled debt restructured loans risk graded special mention, substandard, doubtful and loss are individually evaluated for impairment under ASC 310. Any resulting specific reserves are included in the allowance for loan losses. Commercial 30 - 89 day delinquent troubled debt loan restructures 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 as of March 31, 2017 , and December 31, 2016 , were $1,262,000 and $2,929,000 , respectively. The following table shows the composition of the Corporation’s loan portfolio by loan class for the periods indicated: March 31, 2017 December 31, 2016 Commercial and industrial loans $ 1,258,840 $ 1,194,646 Agricultural production financing and other loans to farmers 77,021 79,689 Real estate loans: Construction 336,931 418,703 Commercial and farmland 2,118,431 1,953,062 Residential 737,918 739,169 Home equity 423,708 418,525 Individuals' loans for household and other personal expenditures 77,590 77,479 Lease financing receivables, net of unearned income 261 311 Other commercial loans 244,209 258,061 Loans $ 5,274,909 $ 5,139,645 Allowance for loan losses (68,225 ) (66,037 ) Net Loans $ 5,206,684 $ 5,073,608 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 the allowance for loan losses is adequate to cover probable losses inherent in the loan portfolio at March 31, 2017 . The process for determining the adequacy of the allowance for loan losses is critical to the Corporation’s financial results. It requires management to make difficult, subjective and complex judgments, to estimate the effect of uncertain matters. The allowance for loan losses considers current factors, including economic conditions and ongoing internal and external examinations, and will increase or decrease as deemed necessary to ensure it remains adequate. In addition, the allowance as a percentage of charge-offs and nonperforming loans will change at different points in time based on credit performance, portfolio mix and collateral values. The allowance for loan losses is maintained through the provision for loan losses, which is a charge against earnings. The allowance is increased by provision expense and decreased by charge-offs less recoveries. All charge-offs are approved by the Bank’s senior loan officers or loan committees, depending on the amount of the charge-off. The Bank charges off a loan when a determination is made that all or a portion of the loan is uncollectible. The amount provided for loan losses in a given period may be greater than or less than net loan losses experienced during the period, and is based on management’s judgment as to the appropriate level of the allowance for loan losses. The determination of the provision amount is based on management’s ongoing review and evaluation of the loan portfolio, including an internally administered loan "watch" list and independent loan reviews. The evaluation takes into consideration identified credit problems, the possibility of losses inherent in the loan portfolio that are not specifically identified and management’s judgment as to the impact of the current environment and economic conditions on the portfolio. The allowance consists of specific impairment reserves as required by ASC 310-10-35, a component for historical losses in accordance with ASC 450 and the consideration of current environmental factors in accordance with ASC 450. A loan is deemed impaired when, based on current information or events, it is probable that all amounts due of principal and interest according to the contractual terms of the loan agreement will not be collected. The historical loss allocation for loans not deemed impaired according to ASC 450 is the product of the volume of loans within the non-impaired criticized and non-criticized risk grade classifications, each segmented by call code, and the historical loss factor for each respective classification and call code segment. The historical loss factors are based upon actual loss experience within each risk and call code classification. The historical look back period for non-criticized loans looks to the most recent rolling-four-quarter average and aligns with the look back period for non-impaired criticized loans. Each of the rolling four quarter periods used to obtain the average, include all charge-offs for the previous twelve-month period, therefore the historical look back period includes seven quarters. The resulting allocation is reflective of current conditions. Criticized loans are grouped based on the risk grade assigned to the loan. Loans with a special mention grade are assigned a loss factor, and loans with a classified grade but not impaired are assigned a separate loss factor. The loss factor computation for this allocation includes a segmented historical loss migration analysis of risk grades to charge-off. In addition to the specific reserves and historical loss components of the allowance, consideration is given to various environmental factors to ensure that losses inherent in the portfolio are reflected in the allowance for loan losses. The environmental component adjusts the historical loss allocations for non-impaired loans to reflect relevant current conditions that, in management's opinion, have an impact on loss recognition. Environmental factors that management reviews in the analysis include: national and local economic trends and conditions; trends in growth in the loan portfolio and growth in higher risk areas; levels of, and trends in, delinquencies and non-accruals; experience and depth of lending management and staff; adequacy of, and adherence to, lending policies and procedures including those for underwriting; industry concentrations of credit; and adequacy of risk identification systems and controls through the internal loan review and internal audit processes. In conformance with ASC 805 and ASC 820, loans purchased after December 31, 2008 are recorded at the acquisition date fair value. Such loans are included in the allowance to the extent a specific impairment is identified that exceeds the fair value adjustment on an impaired loan or the historical loss and environmental factor analysis indicates losses inherent in a purchased portfolio exceeds the fair value adjustment on the portion of the purchased portfolio not deemed impaired. The following tables summarize changes in the allowance for loan losses by loan segment for the three months ended March 31, 2017 , and March 31, 2016 : Three Months Ended March 31, 2017 Commercial Commercial Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2016 $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Provision for losses 1,197 247 249 692 2,385 Recoveries on loans 366 564 101 237 1,268 Loans charged-off (735 ) (152 ) (153 ) (425 ) (1,465 ) Balances, March 31, 2017 $ 28,524 $ 24,320 $ 3,120 $ 12,259 $ 2 $ 68,225 Three Months Ended March 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Provision for losses 139 214 33 164 550 Recoveries on loans 292 952 78 312 1,634 Loans charged-off (645 ) (994 ) (153 ) (759 ) (2,551 ) Balances, March 31, 2016 $ 26,264 $ 22,317 $ 2,647 $ 10,856 $ 2 $ 62,086 The following tables show the Corporation’s allowance for loan losses and loan portfolio by segment as of the periods indicated: March 31, 2017 Commercial Commercial Consumer Residential Finance Total Allowance Balances: Individually evaluated for impairment $ 36 $ 829 $ 317 $ 1,182 Collectively evaluated for impairment 28,488 23,491 $ 3,120 11,942 $ 2 67,043 Loans Acquired with Deteriorated Credit Quality Total Allowance for Loan Losses $ 28,524 $ 24,320 $ 3,120 $ 12,259 $ 2 $ 68,225 Loan Balances: Individually evaluated for impairment $ 3,314 $ 21,701 $ 8 $ 4,444 $ 29,467 Collectively evaluated for impairment 1,573,619 2,405,977 77,582 1,155,610 $ 261 5,213,049 Loans Acquired with Deteriorated Credit Quality 3,137 27,684 1,572 32,393 Loans $ 1,580,070 $ 2,455,362 $ 77,590 $ 1,161,626 $ 261 $ 5,274,909 December 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance Balances: Individually evaluated for impairment $ 37 $ 553 $ 298 $ 888 Collectively evaluated for impairment 27,659 23,108 $ 2,923 11,457 $ 2 65,149 Loans Acquired with Deteriorated Credit Quality Total Allowance for Loan Losses $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Loan Balances: Individually evaluated for impairment $ 4,762 $ 21,358 $ 9 $ 4,450 $ 30,579 Collectively evaluated for impairment 1,520,981 2,315,686 77,470 1,151,396 $ 311 5,065,844 Loans Acquired with Deteriorated Credit Quality 6,653 34,721 1,848 43,222 Loans $ 1,532,396 $ 2,371,765 $ 77,479 $ 1,157,694 $ 311 $ 5,139,645 The risk characteristics of the Corporation’s material portfolio segments are as follows: Commercial Commercial loans are primarily based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Commercial real estate These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Management monitors and evaluates commercial real estate loans based on collateral and risk grade criteria. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Consumer and Residential With respect to residential loans that are secured by 1-4 family residences and are typically owner occupied, the Corporation generally establishes a maximum loan-to-value ratio and requires private mortgage insurance if that ratio is exceeded. Home equity loans are typically secured by a subordinate interest in 1-4 family residences, and consumer loans are secured by consumer assets such as automobiles or recreational vehicles. Some consumer loans are unsecured such as small installment loans and certain lines of credit. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers, which can be impacted by economic conditions in their market areas such as unemployment levels. Repayment can also be impacted by changes in property values on residential properties. Risk is mitigated by the fact that the loans are of smaller individual amounts and spread over a large number of borrowers. Loans are reclassified to a non-accruing status when, in management’s judgment, the collateral value and financial condition of the borrower do not justify accruing interest. When the interest accrual is discontinued, all unpaid accrued interest is reversed against earnings when considered uncollectable. Payments subsequently received on non-accrual loans are applied to principal. A loan is returned to accrual status when principal and interest are no longer past due and collectability is probable, typically after a minimum of six consecutive months of performance. Payments received on impaired accruing or delinquent loans are applied to interest income as accrued. The following table summarizes the Corporation’s non-accrual loans by loan class as of the periods indicated: March 31, 2017 December 31, 2016 Commercial and industrial loans $ 1,975 $ 1,839 Agriculture production financing and other loans to farmers 665 1,329 Real estate loans: Construction 71 73 Commercial and farmland 14,536 15,754 Residential 9,284 9,523 Home equity 1,324 1,457 Individuals' loans for household and other personal expenditures 65 23 Total $ 27,920 $ 29,998 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 loan restructures. 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 as of the periods indicated: March 31, 2017 Unpaid Recorded Related Impaired loans with no related allowance: Commercial and industrial loans $ 13,715 $ 5,786 Agriculture production financing and other loans to farmers 14 5 Real estate Loans: Construction 589 Commercial and farmland 63,743 46,185 Residential 7,664 4,335 Home equity 82 43 Other commercial loans 8 Total $ 85,815 $ 56,354 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 Real estate Loans: Commercial and farmland 3,686 3,026 829 Residential 65 34 23 Total $ 4,411 $ 3,720 $ 888 Total Impaired Loans $ 90,226 $ 60,074 $ 888 December 31, 2016 Unpaid Recorded Related Impaired loans with no related allowance: Commercial and industrial loans $ 17,645 $ 10,074 Agriculture production financing and other loans to farmers 757 680 Real estate Loans: Construction 5,946 3,178 Commercial and farmland 67,936 49,731 Residential 8,039 4,664 Home equity 82 44 Other commercial loans 11 Total $ 100,416 $ 68,371 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 Real estate Loans: Commercial and farmland 4,238 2,985 553 Residential 65 34 23 Total $ 4,963 $ 3,679 $ 612 Total Impaired Loans $ 105,379 $ 72,050 $ 612 Three Months Ended March 31, 2017 Average Interest Impaired loans with no related allowance: Commercial and industrial loans $ 8,571 $ 48 Agriculture production financing and other loans to farmers 145 Real estate Loans: Commercial and farmland 46,680 577 Residential 4,471 41 Home equity 43 Total $ 59,910 $ 666 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 Real estate Loans: Commercial and farmland 3,032 Residential 34 Total $ 3,726 Total Impaired Loans $ 63,636 $ 666 Three Months Ended March 31, 2016 Average Interest Impaired loans with no related allowance: Commercial and industrial loans $ 12,052 $ 109 Agriculture production financing and other loans to farmers 716 1 Real estate Loans: Construction 4,262 85 Commercial and farmland 65,461 871 Residential 7,746 58 Home equity 225 Total $ 90,462 $ 1,124 Impaired loans with related allowance: Commercial and industrial loans $ 1,363 $ 9 Agriculture production financing and other loans to farmers 1,315 Real estate Loans: Commercial and farmland 1,756 Residential 879 Total $ 5,313 $ 9 Total Impaired Loans $ 95,775 $ 1,133 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 periods 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. March 31, 2017 Commercial Commercial Commercial Substandard Commercial Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,190,546 $ 25,537 $ 42,757 $ 1,258,840 Agriculture production financing and other loans to farmers 23,236 34,044 19,741 77,021 Real estate Loans: Construction 319,724 5,138 58 $ 11,940 $ 71 336,931 Commercial and farmland 1,963,654 65,537 87,197 $ 1,687 351 5 2,118,431 Residential 148,677 4,497 5,679 571,451 7,614 737,918 Home equity 9,588 47 352 412,339 1,382 423,708 Individuals' loans for household and other personal expenditures 77,503 87 77,590 Lease financing receivables, net of unearned income 261 261 Other commercial loans 243,339 870 244,209 Loans $ 3,899,025 $ 134,800 $ 156,654 $ 1,687 $ 1,073,584 $ 9,159 $ 5,274,909 December 31, 2016 Commercial Commercial Commercial Substandard Commercial Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,117,545 $ 30,919 $ 46,182 $ 1,194,646 Agriculture production financing and other loans to farmers 30,712 25,273 23,704 79,689 Real estate Loans: Construction 398,646 3,490 1,858 $ 14,636 $ 73 418,703 Commercial and farmland 1,811,367 60,028 80,626 1,034 7 1,953,062 Residential 146,251 5,106 6,046 574,054 7,712 739,169 Home equity 7,310 47 516 409,237 1,415 418,525 Individuals' loans for household and other personal expenditures 77,456 23 77,479 Lease financing receivables, net of unearned income 228 83 311 Other commercial loans 257,861 200 258,061 Loans $ 3,769,920 $ 124,863 $ 159,215 $ 1,076,417 $ 9,230 $ 5,139,645 The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, as of March 31, 2017 , and December 31, 2016 . March 31, 2017 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,255,950 $ 915 $ 1,975 $ 2,890 $ 1,258,840 Agriculture production financing and other loans to farmers 75,251 1,105 665 1,770 77,021 Real estate loans: Construction 336,027 833 71 904 336,931 Commercial and farmland 2,098,174 5,076 $ 645 14,536 20,257 2,118,431 Residential 725,168 2,836 630 9,284 12,750 737,918 Home equity 421,202 906 175 $ 101 1,324 2,506 423,708 Individuals' loans for household and other personal expenditures 77,175 285 43 22 65 415 77,590 Lease financing receivables, net of unearned income 261 261 Other commercial loans 244,209 244,209 Loans $ 5,233,417 $ 11,956 $ 1,493 $ 123 $ 27,920 $ 41,492 $ 5,274,909 December 31, 2016 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645 See the information regarding the analysis of loan loss experience in the "LOAN QUALITY/PROVISION FOR LOAN LOSSES" section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included as ITEM 2 of this Quarterly Report on Form 10-Q. 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 works to maintain its relationship with certain customers who are experiencing financial difficulty by contractually modifying the borrower's debt agreement with the Corporation. In certain loan restructuring situations, the Corporation may grant a concession to a debtor experiencing financial difficulty, resulting in a trouble debt restructuring. A concession is deemed to be granted when, as a result of the restructuring, the Corporation does not expect to collect all original amounts due, including interest accrued at the original contract rate. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of the collateral is considered in determining whether the principal will be paid. The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods indicated: Three Months Ended March 31, 2017 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 107 $ 241 3 Residential 121 122 2 Home equity 122 Total $ 350 $ 363 5 Three Months Ended March 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 260 $ 260 3 Agriculture production financing and other loans to farmers 465 331 2 Real estate loans: Commercial and farmland 352 352 1 Residential 113 133 3 Individuals' loans for household and other personal expenditures 13 13 1 Total $ 1,203 $ 1,089 10 The following tables summarize the recorded investment of troubled debt restructurings as of March 31, 2017 and 2016 , by modification type, that occurred during the periods indicated: Three Months Ended March 31, 2017 Term Rate Combination Total Real estate loans: Commercial and farmland $ 241 $ 241 Residential $ 122 122 Total $ 122 $ 241 $ 363 Three Months Ended March 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 260 $ 260 Agriculture production financing and other loans to farmers $ 331 331 Real estate loans: Commercial and farmland 351 351 Residential 123 123 Individuals loans for household and other personal expenditures 13 13 Total $ 467 $ 611 $ 1,078 Loans secured by commercial and farmland real estate made up 66 percent of the post-modification balance of troubled debt restructured loans made in the three months ended March 31, 2017 . The following tables summarize troubled debt restructures that occurred during the twelve months ended March 31, 2017 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this discussion, a loan is considered in default if it is 30 or more days past due. Three Months Ended March 31, 2017 Number of Recorded Real estate loans: Commercial and farmland 1 $ 223 Total 1 $ 223 Three Months Ended March 31, 2016 Number of Recorded Commercial and industrial loans 3 $ 260 Real estate loans: Commercial and farmland 1 717 Total 4 $ 977 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 loan restructures are generally included in the general historical allowance for loan loss at the post modification balance. Consumer non-accrual and delinquent troubled debt loan restructures are also considered in the calculation of the non-accrual and delinquency trend environmental allowance allocation. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $1,104,000 and $1,530,000 at March 31, 2017 and December 31, 2016, respectively. Commercial troubled debt restructured loans risk graded special mention, substandard, doubtful and loss are individually evaluated for impairment under ASC 310. Any resulting specific reserves are included in the allowance for loan losses. Commercial 30 - 89 day delinquent troubled debt loan restructures 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	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Accounting for Certain Loans Acquired in a Purchase	ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A PURCHASE The acquired loans detailed in the tables below are included in NOTE 4. LOANS AND ALLOWANCE, in the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q. As described in NOTE 4, loans purchased after December 31, 2008 are recorded at the acquisition date fair value, which could result in a fair value discount or premium. Purchased loans with evidence of credit deterioration since origination and for which it is probable at the date of acquisition that the acquirer will not collect all contractually required principal and interest payments are accounted for under ASC 310-30, Loans Acquired with Deteriorated Credit Quality . The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the nonaccretable portion of the fair value discount or premium. The accretable portion of the fair value discount or premium is the difference between the expected cash flows and the net present value of expected cash flows, with such difference accreted into earnings over the term of the loans. All other loans not accounted for under ASC 310-30 are accounted for under ASC 310-20, which allows the fair value adjustment to be accreted into income over the remaining life of the loans. The Corporation's most recent acquisition is detailed in NOTE 2, ACQUISITIONS AND DIVESTITURES, in the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q. In addition, the Corporation acquired C Financial in April 2015, Community in November 2014 and CFS in November 2013. The Corporation also acquired certain loans from SCB in February 2012. The following tables include the outstanding balance and carrying amount of all acquired loans which were included in the Corporation's balance sheet at March 31, 2017 , and December 31, 2016 . March 31, 2017 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 6,888 $ 80 $ 2,100 $ 16,181 $ 3,267 $ 28,516 Agricultural production financing and other loans to farmers 1,551 50 1,134 2,735 Real estate loans: Construction 10,953 2,376 2,844 128 16,301 Commercial and farmland 104,227 21,913 34,218 111,601 8,374 280,333 Residential 98,987 41,744 8,985 91,291 3,820 244,827 Home Equity 10,747 7,669 5,745 25,562 11,797 61,520 Individuals' loans for household and other personal expenditures 650 1 127 181 27 986 Other commercial loans 1,808 64 1,872 Total $ 234,260 $ 73,783 $ 55,570 $ 245,058 $ 28,419 $ 637,090 Carrying Amount $ 226,292 $ 71,983 $ 51,632 $ 233,356 $ 25,461 $ 608,724 Allowance 412 77 102 591 Carrying Amount Net of Allowance $ 225,880 $ 71,983 $ 51,555 $ 233,254 $ 25,461 $ 608,133 December 31, 2016 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 8,003 $ 85 $ 2,269 $ 23,327 $ 3,552 $ 37,236 Agricultural production financing and other loans to farmers 1,030 50 1,630 2,710 Real estate loans: Construction 22,017 2,835 4,026 420 29,298 Commercial and farmland 103,075 22,130 36,947 131,895 9,315 303,362 Residential 103,414 44,101 9,363 96,627 4,135 257,640 Home Equity 11,728 7,947 6,326 26,894 11,924 64,819 Individuals' loans for household and other personal expenditures 762 2 147 201 30 1,142 Other commercial loans 1,825 65 1,890 Total $ 250,824 $ 77,100 $ 60,108 $ 279,479 $ 30,586 $ 698,097 Carrying Amount $ 240,053 $ 75,194 $ 56,007 $ 266,845 $ 27,318 $ 665,417 Allowance 265 23 92 380 Carrying Amount Net of Allowance $ 239,788 $ 75,194 $ 55,984 $ 266,753 $ 27,318 $ 665,037 The outstanding balance and related carrying amount of loans acquired and accounted for under ASC 310-30 as of March 31, 2017 were $46.4 million and $32.4 million , respectively. The outstanding balance and related carrying amount of those loans as of December 31, 2016 were $60.5 million and $43.2 million , 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 tables below. The tables reflect only purchased loans accounted for under ASC 310-30 and not the entire portfolio of purchased loans. Three Months Ended March 31, 2017 Ameriana C Financial Community CFS SCB Total Beginning balance $ 1,630 $ 73 $ 1,233 $ 736 $ 279 $ 3,951 Additions Accretion (2,502 ) (40 ) (62 ) (470 ) (164 ) (3,238 ) Reclassification from nonaccretable 1,696 35 31 466 142 2,370 Disposals Ending balance $ 824 $ 68 $ 1,202 $ 732 $ 257 $ 3,083 Three Months Ended March 31, 2016 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Additions Accretion (40 ) (15 ) (63 ) (1,290 ) (88 ) (1,496 ) Reclassification from nonaccretable 1 11 1,135 36 1,183 Disposals Ending balance $ 2,120 $ 100 $ 1,456 $ 1,033 $ 590 $ 5,299

Goodwill

Goodwill	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL Goodwill is recorded on the acquisition date of an entity. During the measurement period, the Corporation may record subsequent adjustments to goodwill for provisional amounts recorded at the acquisition date. The Corporation did not have any acquisition activity in the three months ended March 31, 2017 . The Ameriana acquisition on December 31, 2015 resulted in $38,624,000 of goodwill, of which, $871,000 was recorded during the first quarter of 2016 as a measurement period adjustment. 2016 Balance, January 1 $ 243,129 Measurement period adjustment 871 Balance, December 31 $ 244,000

Core Deposit Intangibles

Core Deposit Intangibles	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Core Deposit Intangibles	CORE DEPOSIT INTANGIBLES A core deposit intangible is recorded on the acquisition date of an entity. During the measurement period, the Corporation may record subsequent adjustments to the core deposit intangible for provisional amounts recorded at the acquisition date. The Ameriana acquisition on December 31, 2015 resulted in a core deposit intangible of $5,342,000 , of which, $2,142,000 was recorded as a measurement period adjustment in the first quarter of 2016. Details regarding the acquisition are discussed in NOTE 2. ACQUISITIONS AND DIVESTITURES, in the Notes to Consolidated Financial Statements of this Quarterly Report on Form 10-Q. The carrying basis and accumulated amortization of recognized core deposit intangibles are noted below. March 31, 2017 December 31, 2016 Gross carrying amount $ 63,940 $ 61,798 Measurement period adjustment 2,142 Accumulated amortization (49,977 ) (49,074 ) Core deposit intangibles $ 13,963 $ 14,866 Estimated future amortization expense is summarized as follows: Amortization Expense 2017 $ 2,711 2018 2,299 2019 1,914 2020 1,733 2021 1,611 After 2021 3,695 $ 13,963

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTS Risk Management Objective of Using Derivatives The Corporation is exposed to certain risks arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and through the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Corporation’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation’s known or expected cash payments principally related to certain variable-rate liabilities. The Corporation also has derivatives that are a result of a service the Corporation provides to certain qualifying customers, and, therefore, are not used to manage interest rate risk in the Corporation’s assets or liabilities. The Corporation manages a matched book with respect to its derivative instruments offered as a part of this service to its customers in order to minimize its net risk exposure resulting from such transactions. Cash Flow Hedges of Interest Rate Risk The Corporation’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish these objectives, 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 March 31, 2017 and December 31, 2016 , 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 that were designated as cash flow hedges. 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 interest expense as interest payments are made on the Corporation’s variable-rate liabilities. During the next twelve months, the Corporation expects to reclassify $893,000 from accumulated other comprehensive income to interest expense. 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 2017 , $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 of 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 three months ended March 31, 2017 , and 2016 , the Corporation did not recognize any ineffectiveness. 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 March 31, 2017 , the notional amount of customer-facing swaps was approximately $312,621,000 . This amount is offset with third party counterparties, as described above. Fair Values of Derivative Instruments on the Balance Sheet The table below presents the fair value of the Corporation’s derivative financial instruments, as well as their classification on the Balance Sheet, as of March 31, 2017 , and December 31, 2016 . Asset Derivatives Liability Derivatives March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 Balance Fair Balance Fair Balance Fair Balance Fair Derivatives designated as hedging instruments: Interest rate contracts Other Assets $ 6 Other Assets $ 15 Other Liabilities $ 1,916 Other Liabilities $ 2,182 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 6,373 Other Assets $ 6,295 Other Liabilities $ 6,373 Other Liabilities $ 6,295 The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated. Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative Three Months Ended March 31, 2017 March 31, 2016 Interest Rate Products $ 34 $ (1,954 ) 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 three months ended March 31, 2017 and 2016 . Derivatives Not Designated as Location of Gain (Loss) Amount of Gain (Loss) Recognized in Income on Derivative Three Months Ended Three Months Ended Interest rate contracts Other income $ — $ (245 ) The amount of gain (loss) reclassified from other comprehensive income into income is included in the table below for the periods indicated. Derivatives Designated as Location of Gain (Loss) Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion) Three Months Ended Three Months Ended Interest rate contracts Interest Expense (268 ) (324 ) 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 level of risk is monitored by performing quarterly financial reviews, comparing mark-to-mark values with policy limitations, monitoring credit ratings and pledging of collateral. 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 or adequately capitalized institution, then the Corporation could be required to terminate or fully collateralize all outstanding derivative contracts. The Corporation also 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, the Corporation could also be declared in default on its derivative obligations. As of March 31, 2017 , the termination value of derivatives in a net liability position related to these agreements was $3,317,000 . As of March 31, 2017 , the Corporation had minimum collateral posting thresholds with certain of its derivative counterparties and had posted collateral of $8,706,000 . If the Corporation had breached any of these provisions at March 31, 2017 , it could have been required to settle its obligations under the agreements at their termination value.

Disclosures About Fair Value of

Disclosures About Fair Value of Assets and Liabilities	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Disclosures About Fair Value of Assets and Liabilities	DISCLOSURES ABOUT FAIR VALUE OF ASSETS AND LIABILITIES The Corporation used fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The accounting guidance defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC 820 applies only when other guidance requires or permits assets or liabilities to be measured at fair value; it does not expand the use of fair value in any new circumstances. As defined in ASC 820, fair value is the price to sell an asset or transfer a liability in an orderly transaction between market participants. It represents an exit price at the measurement date. Market participants are buyers and sellers, who are independent, knowledgeable, and willing and able to transact in the principal (or most advantageous) market for the asset or liability being measured. Current market conditions, including imbalances between supply and demand, are considered in determining fair value. The Corporation values its assets and liabilities in the principal market where it sells the particular asset or transfers the liability with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market for the asset or liability (i.e., the market where the asset could be sold or the liability transferred at a price that maximizes the amount to be received for the asset or minimizes the amount to be paid to transfer the liability). Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability. Inputs can be observable or unobservable. Observable inputs are those assumptions which market participants would use in pricing the particular asset or liability. These inputs are based on market data and are obtained from a source independent of the Corporation. Unobservable inputs are assumptions based on the Corporation’s own information or estimate of assumptions used by market participants in pricing the asset or liability. Unobservable inputs are based on the best and most current information available on the measurement date. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy which gives the highest ranking to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest ranking to unobservable inputs for which there is little or no market activity (Level 3). Fair values for assets or liabilities classified as Level 2 are based on one or a combination of the following factors: (i) quoted prices for similar assets; (ii) observable inputs for the asset or liability, such as interest rates or yield curves; or (iii) inputs derived principally from or corroborated by observable market data. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Corporation considers an input to be significant if it drives 10 percent or more of the total fair value of a particular asset or liability. RECURRING MEASUREMENTS Assets and liabilities are considered to be measured at fair value on a recurring basis if fair value is measured regularly (i.e., daily, weekly, monthly or quarterly). Recurring valuation occurs at a minimum on the measurement date. Assets and liabilities are considered to be measured at fair value on a nonrecurring basis if the fair value measurement of the instrument does not necessarily result in a change in the amount recorded on the balance sheet. Generally, nonrecurring valuation is the result of the application of other accounting pronouncements which require assets or liabilities to be assessed for impairment or recorded at the lower of cost or fair value. The fair value of assets or liabilities transferred in or out of Level 3 is measured on the transfer date, with any additional changes in fair value subsequent to the transfer considered to be realized or unrealized gains or losses. Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy. Investment Securities Where quoted, market prices are available in an active market and securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include U.S. Treasury and equity securities. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics or discounted cash flows. Level 2 securities include agencies, government-sponsored mortgage backs, state and municipal and equity securities. In certain cases where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy and include state and municipal, corporate obligations and equity securities. Level 3 fair value for state and municipal, corporate obligations and equity securities was determined using a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active. Third party vendors compile prices from various sources and may apply such techniques as matrix pricing to determine the value of identical or similar investment securities (Level 2). Matrix pricing is a mathematical technique widely used in the banking industry to value investment securities without relying exclusively on quoted prices for specific investment securities but rather relying on the investment securities’ relationship to other benchmark quoted investment securities. Any investment security not valued based upon the methods above are considered Level 3. Interest Rate Derivative Agreements See information regarding the Corporation's interest rate derivative products in NOTE 8. DERIVATIVE FINANCIAL INSTRUMENTS, included within the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q. The following table presents the fair value measurements of assets and liabilities recognized in the Consolidated Condensed Balance Sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at March 31, 2017 , and December 31, 2016 . Fair Value Measurements Using: March 31, 2017 Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Significant Available for sale securities: U.S. Treasury $ 747 $ 747 State and municipal 373,737 $ 370,493 $ 3,244 U.S. Government-sponsored mortgage-backed securities 322,699 322,699 Corporate obligations 31 31 Equity securities 33,574 31,558 2,012 4 Interest rate swap asset 6,373 6,373 Interest rate cap 6 6 Interest rate swap liability 8,289 8,289 Fair Value Measurements Using: December 31, 2016 Fair Value Quoted Prices in Significant Other Observable Inputs Significant Available for sale securities: U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 363,658 358,524 $ 5,134 U.S. Government-sponsored mortgage-backed securities 312,292 312,292 Corporate obligations 31 31 Equity securities 20,781 $ 18,765 2,012 4 Interest rate swap asset 6,295 6,295 Interest rate cap 15 15 Interest rate swap liability 8,477 8,477 Level 3 Reconciliation The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the Consolidated Condensed Balance Sheets using significant unobservable (Level 3) inputs for the three months ended March 31, 2017 and 2016. Available for Sale Securities Three Months Ended March 31, 2017 March 31, 2016 Balance at beginning of the period $ 5,169 $ 5,932 Included in other comprehensive income 11 38 Principal payments (1,901 ) (466 ) Ending balance $ 3,279 $ 5,504 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 March 31, 2017 or December 31, 2016 . Transfers Between Levels There were no transfers in or out of Level 3 for the three months ended March 31, 2017 and 2016 . 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 March 31, 2017 , and December 31, 2016 . Fair Value Measurements Using March 31, 2017 Fair Value Quoted Prices in Significant Other Significant Unobservable Impaired loans (collateral dependent) $ 4,813 $ 4,813 Other real estate owned 207 207 Fair Value Measurements Using December 31, 2016 Fair Value Quoted Prices in Significant Other Significant Unobservable Impaired loans (collateral dependent) $ 15,318 $ 15,318 Other real estate owned 1,612 1,612 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 2017 , certain impaired loans were partially charged off or re-evaluated. Impaired loans that are collateral dependent are classified within Level 3 of the fair value hierarchy when impairment is determined using the fair value method. Other Real Estate Owned The fair value for impaired loans and other real estate owned is measured based on the value of the collateral securing those loans or real estate and is determined using several methods. The fair value of real estate is generally determined based on appraisals by qualified licensed appraisers. The appraisers typically determine the value of the real estate by utilizing an income or market valuation approach. If an appraisal is not available, the fair value may be determined by using a discounted cash flow analysis. Fair value on other collateral such as business assets is typically ascertained by assessing, either singularly or some combination of, asset appraisals, accounts receivable aging reports, inventory listings and or customer financial statements. Both appraised values and values based on borrower’s financial information are discounted as considered appropriate based on age and quality of the information and current market conditions. Unobservable (Level 3) Inputs The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at March 31, 2017 and December 31, 2016 . March 31, 2017 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 3,244 Discounted cash flow Maturity/Call date 1 month to 20 yrs US Muni BQ curve A- to BBB- Discount rate .69% - 5% Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR plus premium for illiquidity plus 200bps Impaired loans (collateral dependent) $ 4,813 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (2%) Other real estate owned $ 207 Appraisals Discount to reflect current market conditions 0% - 15% (14%) December 31, 2016 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,134 Discounted cash flow Maturity/Call date 1 month to 20 yrs US Muni BQ curve A- to BBB- Discount rate .69% - 5% Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR plus premium for illiquidity plus 200bps Impaired loans (collateral dependent) $ 15,318 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (1%) Other real estate owned $ 1,612 Appraisals Discount to reflect current market conditions 0% - 10% (9%) Sensitivity of Significant Unobservable Inputs 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 March 31, 2017 , and December 31, 2016 . March 31, 2017 Quoted Prices in Active Markets Significant Significant Unobservable Carrying Amount (Level 1) (Level 2) (Level 3) Assets: Cash and cash equivalents $ 104,247 $ 104,247 Interest-bearing time deposits 20,439 20,439 Investment securities available for sale 730,788 32,306 $ 695,203 $ 3,279 Investment securities held to maturity 596,429 588,185 13,906 Loans held for sale 1,262 1,262 Loans 5,206,684 5,076,999 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap and cap asset 6,379 6,379 Interest receivable 25,174 25,174 Liabilities: Deposits $ 5,635,309 $ 4,426,558 $ 1,191,782 Borrowings: Federal funds purchased 102,000 102,000 Securities sold under repurchase agreements 139,007 138,965 Federal Home Loan Bank advances 338,919 337,655 Subordinated debentures and term loans 128,862 106,584 Interest rate swap liability 8,289 8,289 Interest payable 3,875 3,875 December 31, 2016 Quoted Prices in Active Markets Significant Significant Unobservable Carrying Amount (Level 1) (Level 2) (Level 3) Assets: Cash and cash equivalents $ 127,927 $ 127,927 Interest-bearing time deposits 24,459 24,459 Investment securities available for sale 696,862 18,765 $ 672,928 $ 5,169 Investment securities held to maturity 607,643 597,246 14,687 Loans held for sale 2,929 2,929 Loans 5,073,608 4,933,552 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap and cap asset 6,310 6,310 Interest receivable 26,194 26,194 Liabilities: Deposits $ 5,556,498 $ 4,427,605 $ 1,111,491 Borrowings: Federal funds purchased 120,349 120,349 Securities sold under repurchase agreements 146,480 146,449 Federal Home Loan Bank advances 298,923 297,465 Subordinated debentures and term loans 128,445 105,930 Interest rate swap liability 8,477 8,477 Interest payable 3,110 3,110 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 a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active. 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.

Transfers Accounted for as Secu

Transfers Accounted for as Secured Borrowings	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 were: March 31, 2017 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 $ 125,301 $ 1,337 $ 4,773 $ 7,596 $ 139,007 December 31, 2016 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 129,617 $ 1,337 $ 10,253 $ 5,273 $ 146,480

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and 2016 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total Balance at December 31, 2016 $ 1,035 $ (1,774 ) $ (12,842 ) $ (13,581 ) Other comprehensive income before reclassifications 10,110 23 10,133 Amounts reclassified from accumulated other comprehensive income (389 ) 174 (59 ) (274 ) Period change 9,721 197 (59 ) 9,859 Balance at March 31, 2017 $ 10,756 $ (1,577 ) $ (12,901 ) $ (3,722 ) Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 ) Other comprehensive income before reclassifications 5,135 (1,270 ) 3,865 Amounts reclassified from accumulated other comprehensive income (648 ) 211 (437 ) Period change 4,487 (1,059 ) — 3,428 Balance at March 31, 2016 $ 16,812 $ (3,406 ) $ (11,340 ) $ 2,066 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 three months ended March 31, 2017 and 2016 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended March 31, Details about Accumulated Other Comprehensive Income (Loss)Components 2017 2016 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 598 $ 997 Other income - net realized gains on sales of available for sale securities Related income tax expense (209 ) (349 ) Income tax expense $ 389 $ 648 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (268 ) $ (324 ) Interest expense - subordinated debentures and term loans Related income tax benefit 94 113 Income tax expense $ (174 ) $ (211 ) Unrealized gains (losses) on defined benefit plans Amortization of prior service costs $ 91 Other expenses - salaries and employee benefits Related income tax expense (32 ) Income tax expense $ 59 $ — Total reclassifications for the period, net of tax $ 274 $ 437 (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 3. INVESTMENT SECURITIES, included within the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q. (2) For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see NOTE 8. DERIVATIVE FINANCIAL INSTRUMENTS, included within the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock options and RSAs have been issued to directors, officers and other management employees under the Corporation's 1999 Long-term Equity Incentive Plan and the 2009 Long-term Equity Incentive Plan. The stock options, which have a ten year life, become 100 percent vested ranging from six months to two years and are fully exercisable when vested. Option exercise prices equal the Corporation's common stock closing price on NASDAQ on the date of grant. RSAs issued to employees and non-employee directors provide for the issuance of shares of the Corporation's common stock at no cost to the holder and generally vest after three years. The RSAs vest only if the employee is actively employed by the Corporation on the vesting date and, therefore, any unvested shares are forfeited. For non-employee directors, the RSAs 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 ("DSU") can be credited to non-employee directors who have elected 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 March 31, 2017 , there were no outstanding DSUs. The Corporation’s 2009 ESPP provides eligible employees of the Corporation and its subsidiaries an opportunity to purchase shares of common stock of the Corporation through quarterly offerings financed by payroll deductions. The price of the stock to be paid by the employees shall be equal to 85 percent of the average of the closing price of the Corporation’s common stock on each trading day during the offering period. However, in no event shall such purchase price be less than the lesser of an amount equal to 85 percent of the market price of the Corporation’s stock on the offering date or an amount equal to 85 percent of the market value on the date of purchase. Common stock purchases are made quarterly and are paid through advance payroll deductions up to a calendar year maximum of $25,000 . Compensation expense related to unvested share-based awards is recorded by recognizing the unamortized grant date fair value of these awards over the remaining service periods of those awards, with no change in historical reported fair values and earnings. Awards are valued at fair value in accordance with provisions of share-based compensation guidance and are recognized on a straight-line basis over the service periods of each award. To complete the exercise of vested stock options, RSA’s and ESPP options, the Corporation generally issues new shares from its authorized but unissued share pool. Share-based compensation for the three months ended March 31, 2017 was $573,000 compared to $593,000 for the three months ended March 31, 2016 . Share-based compensation has been recognized as a component of salaries and benefits expense in the accompanying Consolidated Condensed Statements of Income. The estimated fair value of the stock options granted during 2014 and in prior years was calculated using a Black Scholes option pricing model. There have been no stock options granted since 2014. The Black Scholes model incorporates assumptions 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 Condensed 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 2.8 percent for the three months ended March 31, 2017 , based on historical experience. The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense and the income tax benefit of such awards. The income tax benefit increase in the three months ended March 31, 2017 is due to the implementation of ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . This ASU requires all income tax effects of awards to be recognized as income tax expense or benefit in the income statement when the awards vest or are settled. Implementation of the ASU was effective January 1, 2017 and resulted in approximately $772,000 of income tax benefit in the first quarter. Three Months Ended 2017 2016 Stock and ESPP Options Pre-tax compensation expense $ 48 $ 15 Income tax expense (benefit) (246 ) Stock and ESPP option expense, net of income taxes $ (198 ) $ 15 Restricted Stock Awards Pre-tax compensation expense $ 525 $ 578 Income tax benefit (710 ) (202 ) Restricted stock awards expense, net of income taxes $ (185 ) $ 376 Total Share-Based Compensation Pre-tax compensation expense $ 573 $ 593 Income tax benefit (956 ) (202 ) Total share-based compensation expense, net of income taxes $ (383 ) $ 391 As of March 31, 2017 , unrecognized compensation expense related to RSAs was $3,087,000 and is expected to be recognized over a weighted-average period of 1.55 years. The Corporation did no t have any unrecognized compensation expense related to stock options as of March 31, 2017 . Stock option activity under the Corporation's stock option plans as of March 31, 2017 and changes during the three months ended March 31, 2017 , were as follows: Number of Weighted-Average Exercise Price Weighted Average Remaining Aggregate Outstanding at January 1, 2017 260,211 $ 19.26 Granted Exercised (80,835 ) $ 22.76 Canceled Outstanding March 31, 2017 179,376 $ 17.68 2.86 3,882,228 Vested and Expected to Vest at March 31, 2017 179,376 $ 17.68 2.86 3,882,228 Exercisable at March 31, 2017 179,376 $ 17.68 2.86 3,882,228 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 the first three months of 2017 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 March 31, 2017 . 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 three months ended March 31, 2017 and 2016 was $1,823,000 and $77,000 , respectively. Cash receipts of stock options exercised during this same period were $1,314,000 and $73,000 , respectively. The following table summarizes information on unvested RSAs outstanding as of March 31, 2017 : Number of Shares Weighted-Average Unvested RSAs at January 1, 2017 328,347 $ 22.87 Granted 3,332 $ 39.32 Vested (76,951 ) $ 20.43 Forfeited (2,682 ) $ 23.02 Unvested RSAs at March 31, 2017 252,046 $ 23.83 The grant date fair value of ESPP options was estimated at the beginning of the January 1, 2017 quarterly offering period of approximately $48,000 . The ESPP options vested during the three months ending March 31, 2017 , leaving no unrecognized compensation expense related to unvested ESPP options at March 31, 2017 .

Income Tax

Income Tax	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Tax	INCOME TAX The following table summarizes the major components creating differences between income taxes at the federal statutory and the effective tax rate recorded in the consolidated statements of income for the three months ended March 31, 2017 and 2016 : Three Months Ended 2017 2016 Reconciliation of Federal Statutory to Actual Tax Expense: Federal statutory income tax at 35% $ 10,627 $ 8,143 Tax-exempt interest income (2,549 ) (2,026 ) Share-based compensation (755 ) 2 Earnings on life insurance (314 ) (517 ) Tax credits (132 ) (129 ) Other 291 101 Actual Tax Expense $ 7,168 $ 5,574 Effective Tax Rate 23.6 % 24.0 %

Net Income Per Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2017
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, 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 three months ended March 31, 2017 and 2016 . Three Months Ended March 31, 2017 2016 Net Income Weighted-Average Shares Per Share Net Income Weighted-Average Shares Per Share Net income available to common stockholders 23,193 40,984,481 $ 0.57 17,693 40,690,573 $ 0.43 Effect of dilutive stock options and warrants 236,105 226,399 Diluted net income per share $ 23,193 41,220,586 $ 0.56 $ 17,693 40,916,972 $ 0.43 For the three months ended March 31, 2017, there were no stock options with an option price greater than the average market price of the common stock. Stock options to purchase 153,721 shares for the three months ended March 31, 2016 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.

Impact of Accounting Changes

Impact of Accounting Changes	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Impact of Accounting Changes	IMPACT OF ACCOUNTING CHANGES The Corporation continually monitors potential accounting changes and pronouncements. The following pronouncements have been deemed to have the most applicability to the Corporation's financial statements: FASB Accounting Standards Update No. 2017-08 - Receivables -Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities Summary - The FASB has issued Accounting Standards Update (ASU) 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities. The ASU shortens the amortization period for certain callable debt securities held at a premium to the earliest call date. Under current GAAP, entities normally amortize the premium as an adjustment of yield over the contractual life of the instrument. Stakeholders have expressed concerns with the current approach on the basis that current GAAP excludes certain callable debt securities from consideration of early repayment of principal even if the holder is certain that the call will be exercised. As a result, upon the exercise of a call on a callable debt security held at a premium, the unamortized premium is recorded as a loss in earnings. Further, there is diversity in practice (1) in the amortization period for premiums of callable debt securities, and (2) in how the potential for exercise of a call is factored into current impairment assessments. Another issue is that the practice in the United States is to quote, price, and trade callable debt securities assuming a model that incorporates consideration of calls (also referred to as “yield-to-worst” pricing). The ASU shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. However, the amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for public business entities for annual periods beginning after December 15, 2018, including interim periods within those annual periods. For other entities, the amendments are effective for annual periods beginning after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. Entities are required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The entity is required to provide disclosures about a change in accounting principle in the period of adoption. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2017-07 - Compensation -Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost Summary - The FASB has issued Accounting Standards Update (ASU) No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . The amendments apply to all employers, including not-for-profit entities, that offer to their employees defined benefit pension plans, other postretirement benefit plans, or other types of benefits accounted for under Topic 715, Compensation - Retirement Benefits . The amendments require that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments also allow only the service cost component to be eligible for capitalization when applicable (e.g., as a cost of internally manufactured inventory or a self-constructed asset). The amendments are effective for public business entities for annual periods beginning after December 15, 2017, including interim periods within those annual periods. For other entities, the amendments are effective for annual periods beginning after December 15, 2018, and interim periods within annual periods beginning after December 15, 2019. Early adoption is permitted as of the beginning of an annual period for which financial statements (interim or annual) have not been issued or made available for issuance. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Summary - The FASB has issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This new guidance was issued to address concerns that current generally accepted accounting principles (GAAP) restricts the ability to record credit losses that are expected, but do not yet meet the “probable” threshold by replacing the current “incurred loss” model for recognizing credit losses with an “expected life of loan loss” model referred to as the Current Expected Credit Loss (CECL) model. Under the CECL model, certain financial assets carried at amortized cost, such as loans held for investment and held-to-maturity debt securities, are required to be presented at the net amount expected to be collected. The measurement of expected credit losses is to be based on information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. This measurement will take place at the time the financial asset is first added to the balance sheet and periodically thereafter. This differs significantly from the “incurred loss” model required under current GAAP, which delays recognition until it is probable a loss has been incurred. The change could materially affect how the allowance for loan losses is determined and cause a charge to earnings through the provision for loan losses. Such would adversely affect the financial condition of the Corporation. The ASU is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The impact of CECL model implementation is being evaluated, but it’s expected a one-time cumulative-effect adjustment to the allowance for loan losses will be recognized in retained earnings on the consolidated balance sheet as of the beginning of the first reporting period in which the new standard is effective, as is consistent with regulatory expectations set forth in interagency guidance issued at the end of 2016. The magnitude of any such adjustment or the overall impact of the new standard on financial condition or results of operations cannot yet be determined. FASB Accounting Standards Update No. 2016-02 - Leases (Topic 842) Summary - The FASB has issued its new lease accounting guidance in Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842). Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: • A lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and • A right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. Certain targeted improvements were made to align, where necessary, lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The new lease guidance simplified the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. Public business entities should apply the amendments in ASU 2016-02 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years (i.e., January 1, 2019, for a calendar year entity). Nonpublic business entities should apply the amendments for fiscal years beginning after December 15, 2019 (i.e., January 1, 2020, for a calendar year entity), and interim periods within fiscal years beginning after December 15, 2020. Early application is permitted for all public business entities and all nonpublic business entities upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The impact of this ASU is being evaluated, but it’s expected a one-time adjustment to the Corporation’s other assets and other liabilities on the consolidated balance sheet will occur as of the beginning of the first reporting period in which the new standard is effective. The magnitude of any such adjustment or the overall impact of the new standard on financial condition, results of operations and regulatory capital cannot yet be determined. FASB Accounting Standards Updates No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities Summary - The FASB has issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance is intended to improve the recognition and measurement of financial instruments. The ASU affects public and private companies, not-for-profit organizations, and employee benefit plans that hold financial assets or owe financial liabilities. The new guidance makes targeted improvements to existing U.S. GAAP by: • Requiring equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; • Requiring public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; • Requiring separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; • Eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; • Eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and • Requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. For private companies, not-for-profit organizations, and employee benefit plans, the new guidance becomes effective for fiscal years beginning after December 15, 2018, and for interim periods within fiscal years beginning after December 15, 2019. The new guidance permits early adoption of the own credit provision. In addition, the new guidance permits early adoption of the provision that exempts private companies and not-for-profit organizations from having to disclose fair value information about financial instruments measured at amortized cost. Adoption of this ASU is not expected to have a significant effect on the Corporation’s consolidated financial statements. FASB Accounting Standards Updates No. 2014-09, Revenue from Contracts with Customers (Topic 606): Summary - The FASB has issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) . The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. ASU 2014-09 creates a single, principle-based revenue recognition framework and will require entities to apply significantly more judgment and expanded disclosures surrounding revenue recognition. The core principle requires and entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those good or services. ASU 2014-09 applies to contracts with customers to provide goods and services, with certain exclusion such as lease contracts, financing arrangements and financial instruments. The amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2017. Early adoption is permitted for annual reporting periods beginning after December 15, 2016. The Corporation’s revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. ASU 2014-09 could require the Corporation to change how certain recurring revenue streams are recognized; however, these changes are not expected to have a significant impact on the Corporation’s financial statements. The impact of ASU 2014-09 on components of non-interest income is still being evaluated. Adoption of the standard is required in the first quarter of 2018 with a cumulative effect adjustment to opening retained earnings if such adjustment is deemed to be significant.

General Litigation and Regulato

General Litigation and Regulatory Examinations	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
General Litigation and Regulatory Examinations	GENERAL LITIGATION AND REGULATORY EXAMINATIONS The Corporation is subject to claims and lawsuits that arise primarily in the ordinary course of business. Additionally, the Corporation is subject to periodic examinations by various regulatory agencies. It is the opinion of management that the disposition or ultimate resolution of such claims, lawsuits, and examinations will not have a material adverse effect on the consolidated financial position, results of operations and cash flow of the Corporation.

Consummation of Mergers

Consummation of Mergers	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Consummation of Mergers	ACQUISITIONS Ameriana Bancorp, Inc. On December 31, 2015, the Corporation acquired 100 percent of Ameriana. Ameriana merged with and into the Corporation (the "Ameriana Merger") whereupon the separate corporate existence of Ameriana ceased and the Corporation survived. Immediately following the Ameriana Merger, Ameriana Bank, an Indiana bank and wholly-owned subsidiary of Ameriana, merged with and into the Bank, with the Bank continuing as the surviving bank. Ameriana was headquartered in New Castle, Indiana and had 13 banking centers serving central and east central Indiana. Pursuant to the merger agreement, each Ameriana shareholder received 0.9037 shares of the Corporation's 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 synergies and economies of scale. Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 61,754 Loans 316,929 Premises and equipment 13,946 Federal Home Loan Bank stock 2,693 Other real estate owned 5,613 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 6,713 Deposits (383,718 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,884 ) Subordinated debentures (5,487 ) Other liabilities (9,451 ) Net tangible assets acquired 26,436 Core deposit intangible 5,342 Goodwill 38,624 Purchase price $ 70,402 Of the total purchase price, $5,342,000 has been allocated to a core deposit intangible that will be amortized over its estimated life of 10 years. The remaining purchase price has been allocated to goodwill, which is not deductible for tax purposes. CONSUMMATION OF MERGERS The Arlington Bank Merger On January 25, 2017, the Corporation, the Bank and The Arlington Bank, an Ohio savings bank ("Arlington Bank"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which Arlington Bank will, subject to the terms and conditions of the merger agreement, merge with and into the Bank, whereupon the separate corporate existence of Arlington Bank will cease and the Bank will survive. Based on the closing price of the Corporation's common stock on January 24, 2017 of $36.46 per share, the transaction value is estimated at approximately $75.8 million . The transaction is expected to be a tax-free stock exchange for Arlington Bank's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to Arlington Bank's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the second quarter of 2017. Arlington Bank's total assets as of March 31, 2017 were $292 million . Independent Alliance Banks, Inc. Merger On February 17, 2017, the Corporation and Independent Alliance Banks, Inc., an Indiana corporation ("IALB"), entered into an Agreement and Plan of Reorganization and Merger, pursuant to which IALB will, subject to the terms and conditions of the merger agreement, merge with and into the Corporation, whereupon the separate corporate existence of IALB will cease and the Corporation will survive. Immediately following the merger, IALB's wholly-owned subsidiary, iAB Financial Bank, shall be merged with and into the Bank, with the Bank continuing as the surviving bank. On November 21, 2016, the Corporation purchased 495,112 shares or 12.1 percent of IALB's outstanding common stock from an IALB shareholder for $19.8 million . Based on the closing price of the Corporation's common stock on February 16, 2017 of $42.10 per share, the transaction value for the remaining shares of common stock, not owned by the Corporation, is approximately $251.3 million . The transaction is expected to be a tax-free stock exchange for IALB's shareholders who will be receiving the Corporation's common stock pursuant to the merger. Subject to IALB's shareholders’ approval of the merger, regulatory approvals and other customary closing conditions, the parties anticipate completing the merger in the third quarter of 2017. IALB's total assets as of March 31, 2017 were $1.1 billion .

Subsequent Events (Notes)

Subsequent Events (Notes)	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On May 1, 2017, the shareholders of the Corporation approved amendments to the Corporation's Articles of Incorporation to (i) increase the number of shares of common stock which it is authorized to issue from 50,000,000 to 100,000,000 shares; and (ii) eliminate the designations for the Fixed Rate Cumulative Perpetual Preferred Stock, Series A, and the Senior Non-Cumulative Perpetual Preferred Stock, Series B, neither of which Series had any outstanding shares.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Schedule of preliminary valuations of the fair value of assets acquired and liabilities assumed	Fair Value Cash and cash equivalents $ 4,068 Interest-bearing time deposits 8,790 Investment securities 61,754 Loans 316,929 Premises and equipment 13,946 Federal Home Loan Bank stock 2,693 Other real estate owned 5,613 Interest receivable 1,306 Cash surrender value of life insurance 28,188 Other assets 6,713 Deposits (383,718 ) Interest payable (24 ) Federal Home Loan Bank Advances (24,884 ) Subordinated debentures (5,487 ) Other liabilities (9,451 ) Net tangible assets acquired 26,436 Core deposit intangible 5,342 Goodwill 38,624 Purchase price $ 70,402

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost, gross unrealized gains, gross unrealized losses and approximate fair value of 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 Gross Gross Fair Available for sale at March 31, 2017 U.S. Treasury $ 747 $ 747 State and municipal 368,545 $ 9,345 $ 4,153 373,737 U.S. Government-sponsored mortgage-backed securities 323,912 1,736 2,949 322,699 Corporate obligations 31 31 Equity securities 21,820 11,754 33,574 Total available for sale 715,055 22,835 7,102 730,788 Held to maturity at March 31, 2017 U.S. Government-sponsored agency securities 22,618 458 22,160 State and municipal 231,129 4,096 1,386 233,839 U.S. Government-sponsored mortgage-backed securities 342,682 4,941 1,531 346,092 Total held to maturity 596,429 9,037 3,375 602,091 Total Investment Securities $ 1,311,484 $ 31,872 $ 10,477 $ 1,332,879 Amortized Gross Gross Fair Available for sale at December 31, 2016 U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 360,779 $ 8,443 $ 5,564 363,658 U.S. Government-sponsored mortgage-backed securities 313,459 1,904 3,071 312,292 Corporate obligations 31 31 Equity securities 21,820 1,039 20,781 Total available for sale 696,189 10,347 9,674 696,862 Held to maturity at December 31, 2016 U.S. Government-sponsored agency securities 22,619 479 22,140 State and municipal 224,811 3,136 1,796 226,151 U.S. Government-sponsored mortgage-backed securities 360,213 4,956 1,527 363,642 Total held to maturity 607,643 8,092 3,802 611,933 Total Investment Securities $ 1,303,832 $ 18,439 $ 13,476 $ 1,308,795
Schedule of amortized cost and fair value of available for sale securities and held to maturity securities	The amortized cost and fair value of available for sale and held to maturity securities at March 31, 2017 and December 31, 2016 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at March 31, 2017: Due in one year or less $ 3,604 $ 3,643 $ 4,771 $ 4,825 Due after one through five years 10,687 11,260 70,442 71,687 Due after five through ten years 57,708 59,851 51,387 51,438 Due after ten years 297,324 299,761 127,147 128,049 $ 369,323 $ 374,515 $ 253,747 $ 255,999 U.S. Government-sponsored mortgage-backed securities 323,912 322,699 342,682 346,092 Equity securities 21,820 33,574 Total Investment Securities $ 715,055 $ 730,788 $ 596,429 $ 602,091 Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Maturity Distribution at December 31, 2016 Due in one year or less $ 2,703 $ 2,717 $ 2,046 $ 2,047 Due after one through five years 16,359 17,068 61,921 63,193 Due after five through ten years 60,614 62,241 61,606 61,145 Due after ten years 281,234 281,763 121,857 121,906 $ 360,910 $ 363,789 $ 247,430 $ 248,291 U.S. Government-sponsored mortgage-backed securities 313,459 312,292 360,213 363,642 Equity securities 21,820 20,781 Total Investment Securities $ 696,189 $ 696,862 $ 607,643 $ 611,933
Schedule of gross gains on sales and redemptions of available for sale securities	Gross gains on the sales and redemptions of available for sale securities for the three months ended March 31, 2017 and 2016 are shown below. Three Months Ended 2017 2016 Sales and Redemptions of Available for Sale Securities: Gross gains $ 598 $ 997 Gross losses
Schedule of investment securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a 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 March 31, 2017 , and December 31, 2016 : Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at March 31, 2017 State and municipal $ 109,641 $ 4,153 $ 109,641 $ 4,153 U.S. Government-sponsored mortgage-backed securities 183,878 2,949 183,878 2,949 Total Temporarily Impaired Available for Sale Securities 293,519 7,102 293,519 7,102 Temporarily Impaired Held to Maturity Securities at March 31, 2017 Federal agencies 22,160 458 22,160 458 State and municipal 36,582 1,386 36,582 1,386 U.S. Government-sponsored mortgage-backed securities 108,696 1,531 108,696 1,531 Total Temporarily Impaired Held to Maturity Securities 167,438 3,375 167,438 3,375 Total Temporarily Impaired Investment Securities $ 460,957 $ 10,477 $ 460,957 $ 10,477 Less than 12 Months Total Fair Gross Fair Gross Fair Gross Temporarily Impaired Available for Sale Securities at December 31, 2016 State and municipal $ 126,593 $ 5,564 $ 126,593 $ 5,564 U.S. Government-sponsored mortgage-backed securities 185,544 3,071 185,544 3,071 Equity Securities 18,765 1,039 18,765 1,039 Total Temporarily Impaired Available for Sale Securities 330,902 9,674 330,902 9,674 Temporarily Impaired Held to Maturity Securities at December 31, 2016 U.S. Government-sponsored agency securities 19,121 479 19,121 479 State and municipal 50,897 1,796 50,897 1,796 U.S. Government-sponsored mortgage-backed securities 109,377 1,527 109,377 1,527 Total Temporarily Impaired Held to Maturity Securities 179,395 3,802 179,395 3,802 Total Temporarily Impaired Investment Securities $ 510,297 $ 13,476 $ 510,297 $ 13,476
Schedule of investments in debt and equity securities reported in the financial statements at an amount less than their historical cost	Certain investments in debt and equity securities are reported in the financial statements at an amount less than their historical cost as indicated in the table below. March 31, 2017 December 31, 2016 Investments reported at less than historical cost: Historical cost $ 471,434 $ 523,773 Fair value $ 460,957 $ 510,297 Percent of the Corporation's available for sale and held to maturity portfolio 34.7 % 39.1 %

Loans and Allowance (Tables)

Loans and Allowance (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Composition of loan portfolio by loan class	The following table shows the composition of the Corporation’s loan portfolio by loan class for the periods indicated: March 31, 2017 December 31, 2016 Commercial and industrial loans $ 1,258,840 $ 1,194,646 Agricultural production financing and other loans to farmers 77,021 79,689 Real estate loans: Construction 336,931 418,703 Commercial and farmland 2,118,431 1,953,062 Residential 737,918 739,169 Home equity 423,708 418,525 Individuals' loans for household and other personal expenditures 77,590 77,479 Lease financing receivables, net of unearned income 261 311 Other commercial loans 244,209 258,061 Loans $ 5,274,909 $ 5,139,645 Allowance for loan losses (68,225 ) (66,037 ) Net Loans $ 5,206,684 $ 5,073,608
Changes in allowance for loan losses	The following tables summarize changes in the allowance for loan losses by loan segment for the three months ended March 31, 2017 , and March 31, 2016 : Three Months Ended March 31, 2017 Commercial Commercial Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2016 $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Provision for losses 1,197 247 249 692 2,385 Recoveries on loans 366 564 101 237 1,268 Loans charged-off (735 ) (152 ) (153 ) (425 ) (1,465 ) Balances, March 31, 2017 $ 28,524 $ 24,320 $ 3,120 $ 12,259 $ 2 $ 68,225 Three Months Ended March 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance for loan losses: Balances, December 31, 2015 $ 26,478 $ 22,145 $ 2,689 $ 11,139 $ 2 $ 62,453 Provision for losses 139 214 33 164 550 Recoveries on loans 292 952 78 312 1,634 Loans charged-off (645 ) (994 ) (153 ) (759 ) (2,551 ) Balances, March 31, 2016 $ 26,264 $ 22,317 $ 2,647 $ 10,856 $ 2 $ 62,086
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 segment as of the periods indicated: March 31, 2017 Commercial Commercial Consumer Residential Finance Total Allowance Balances: Individually evaluated for impairment $ 36 $ 829 $ 317 $ 1,182 Collectively evaluated for impairment 28,488 23,491 $ 3,120 11,942 $ 2 67,043 Loans Acquired with Deteriorated Credit Quality Total Allowance for Loan Losses $ 28,524 $ 24,320 $ 3,120 $ 12,259 $ 2 $ 68,225 Loan Balances: Individually evaluated for impairment $ 3,314 $ 21,701 $ 8 $ 4,444 $ 29,467 Collectively evaluated for impairment 1,573,619 2,405,977 77,582 1,155,610 $ 261 5,213,049 Loans Acquired with Deteriorated Credit Quality 3,137 27,684 1,572 32,393 Loans $ 1,580,070 $ 2,455,362 $ 77,590 $ 1,161,626 $ 261 $ 5,274,909 December 31, 2016 Commercial Commercial Consumer Residential Finance Total Allowance Balances: Individually evaluated for impairment $ 37 $ 553 $ 298 $ 888 Collectively evaluated for impairment 27,659 23,108 $ 2,923 11,457 $ 2 65,149 Loans Acquired with Deteriorated Credit Quality Total Allowance for Loan Losses $ 27,696 $ 23,661 $ 2,923 $ 11,755 $ 2 $ 66,037 Loan Balances: Individually evaluated for impairment $ 4,762 $ 21,358 $ 9 $ 4,450 $ 30,579 Collectively evaluated for impairment 1,520,981 2,315,686 77,470 1,151,396 $ 311 5,065,844 Loans Acquired with Deteriorated Credit Quality 6,653 34,721 1,848 43,222 Loans $ 1,532,396 $ 2,371,765 $ 77,479 $ 1,157,694 $ 311 $ 5,139,645
Summary of non-accrual loans by loan class	The following table summarizes the Corporation’s non-accrual loans by loan class as of the periods indicated: March 31, 2017 December 31, 2016 Commercial and industrial loans $ 1,975 $ 1,839 Agriculture production financing and other loans to farmers 665 1,329 Real estate loans: Construction 71 73 Commercial and farmland 14,536 15,754 Residential 9,284 9,523 Home equity 1,324 1,457 Individuals' loans for household and other personal expenditures 65 23 Total $ 27,920 $ 29,998
Composition of impaired loans by loan class	The following tables show the composition of the Corporation’s commercial impaired loans by loan class as of the periods indicated: March 31, 2017 Unpaid Recorded Related Impaired loans with no related allowance: Commercial and industrial loans $ 13,715 $ 5,786 Agriculture production financing and other loans to farmers 14 5 Real estate Loans: Construction 589 Commercial and farmland 63,743 46,185 Residential 7,664 4,335 Home equity 82 43 Other commercial loans 8 Total $ 85,815 $ 56,354 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 Real estate Loans: Commercial and farmland 3,686 3,026 829 Residential 65 34 23 Total $ 4,411 $ 3,720 $ 888 Total Impaired Loans $ 90,226 $ 60,074 $ 888 December 31, 2016 Unpaid Recorded Related Impaired loans with no related allowance: Commercial and industrial loans $ 17,645 $ 10,074 Agriculture production financing and other loans to farmers 757 680 Real estate Loans: Construction 5,946 3,178 Commercial and farmland 67,936 49,731 Residential 8,039 4,664 Home equity 82 44 Other commercial loans 11 Total $ 100,416 $ 68,371 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 $ 660 $ 36 Real estate Loans: Commercial and farmland 4,238 2,985 553 Residential 65 34 23 Total $ 4,963 $ 3,679 $ 612 Total Impaired Loans $ 105,379 $ 72,050 $ 612 Three Months Ended March 31, 2017 Average Interest Impaired loans with no related allowance: Commercial and industrial loans $ 8,571 $ 48 Agriculture production financing and other loans to farmers 145 Real estate Loans: Commercial and farmland 46,680 577 Residential 4,471 41 Home equity 43 Total $ 59,910 $ 666 Impaired loans with related allowance: Agriculture production financing and other loans to farmers $ 660 Real estate Loans: Commercial and farmland 3,032 Residential 34 Total $ 3,726 Total Impaired Loans $ 63,636 $ 666 Three Months Ended March 31, 2016 Average Interest Impaired loans with no related allowance: Commercial and industrial loans $ 12,052 $ 109 Agriculture production financing and other loans to farmers 716 1 Real estate Loans: Construction 4,262 85 Commercial and farmland 65,461 871 Residential 7,746 58 Home equity 225 Total $ 90,462 $ 1,124 Impaired loans with related allowance: Commercial and industrial loans $ 1,363 $ 9 Agriculture production financing and other loans to farmers 1,315 Real estate Loans: Commercial and farmland 1,756 Residential 879 Total $ 5,313 $ 9 Total Impaired Loans $ 95,775 $ 1,133
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 periods 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. March 31, 2017 Commercial Commercial Commercial Substandard Commercial Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,190,546 $ 25,537 $ 42,757 $ 1,258,840 Agriculture production financing and other loans to farmers 23,236 34,044 19,741 77,021 Real estate Loans: Construction 319,724 5,138 58 $ 11,940 $ 71 336,931 Commercial and farmland 1,963,654 65,537 87,197 $ 1,687 351 5 2,118,431 Residential 148,677 4,497 5,679 571,451 7,614 737,918 Home equity 9,588 47 352 412,339 1,382 423,708 Individuals' loans for household and other personal expenditures 77,503 87 77,590 Lease financing receivables, net of unearned income 261 261 Other commercial loans 243,339 870 244,209 Loans $ 3,899,025 $ 134,800 $ 156,654 $ 1,687 $ 1,073,584 $ 9,159 $ 5,274,909 December 31, 2016 Commercial Commercial Commercial Substandard Commercial Commercial Loss Consumer Performing Consumer Total Commercial and industrial loans $ 1,117,545 $ 30,919 $ 46,182 $ 1,194,646 Agriculture production financing and other loans to farmers 30,712 25,273 23,704 79,689 Real estate Loans: Construction 398,646 3,490 1,858 $ 14,636 $ 73 418,703 Commercial and farmland 1,811,367 60,028 80,626 1,034 7 1,953,062 Residential 146,251 5,106 6,046 574,054 7,712 739,169 Home equity 7,310 47 516 409,237 1,415 418,525 Individuals' loans for household and other personal expenditures 77,456 23 77,479 Lease financing receivables, net of unearned income 228 83 311 Other commercial loans 257,861 200 258,061 Loans $ 3,769,920 $ 124,863 $ 159,215 $ 1,076,417 $ 9,230 $ 5,139,645
Past due aging of loan portfolio by loan class	The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, as of March 31, 2017 , and December 31, 2016 . March 31, 2017 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,255,950 $ 915 $ 1,975 $ 2,890 $ 1,258,840 Agriculture production financing and other loans to farmers 75,251 1,105 665 1,770 77,021 Real estate loans: Construction 336,027 833 71 904 336,931 Commercial and farmland 2,098,174 5,076 $ 645 14,536 20,257 2,118,431 Residential 725,168 2,836 630 9,284 12,750 737,918 Home equity 421,202 906 175 $ 101 1,324 2,506 423,708 Individuals' loans for household and other personal expenditures 77,175 285 43 22 65 415 77,590 Lease financing receivables, net of unearned income 261 261 Other commercial loans 244,209 244,209 Loans $ 5,233,417 $ 11,956 $ 1,493 $ 123 $ 27,920 $ 41,492 $ 5,274,909 December 31, 2016 Current 30-59 Days 60-89 Days Loans > 90 Days Non-Accrual Total Past Due Total Commercial and industrial loans $ 1,192,079 $ 466 $ 162 $ 100 $ 1,839 $ 2,567 $ 1,194,646 Agriculture production financing and other loans to farmers 78,360 1,329 1,329 79,689 Real estate loans: Construction 415,975 2,655 73 2,728 418,703 Commercial and farmland 1,932,896 1,385 3,027 15,754 20,166 1,953,062 Residential 725,338 3,664 635 9 9,523 13,831 739,169 Home equity 415,969 850 246 3 1,457 2,556 418,525 Individuals' loans for household and other personal expenditures 76,929 470 57 23 550 77,479 Lease financing receivables, net of unearned income 311 311 Other commercial loans 258,061 258,061 Loans $ 5,095,918 $ 9,490 $ 4,127 $ 112 $ 29,998 $ 43,727 $ 5,139,645
Schedules of troubled debt restructurings	The following tables summarize troubled debt restructurings in the Corporation's loan portfolio that occurred during the periods indicated: Three Months Ended March 31, 2017 Pre-Modification Post-Modification Number Real estate loans: Commercial and farmland $ 107 $ 241 3 Residential 121 122 2 Home equity 122 Total $ 350 $ 363 5 Three Months Ended March 31, 2016 Pre-Modification Post-Modification Number Commercial and industrial loans $ 260 $ 260 3 Agriculture production financing and other loans to farmers 465 331 2 Real estate loans: Commercial and farmland 352 352 1 Residential 113 133 3 Individuals' loans for household and other personal expenditures 13 13 1 Total $ 1,203 $ 1,089 10 The following tables summarize the recorded investment of troubled debt restructurings as of March 31, 2017 and 2016 , by modification type, that occurred during the periods indicated: Three Months Ended March 31, 2017 Term Rate Combination Total Real estate loans: Commercial and farmland $ 241 $ 241 Residential $ 122 122 Total $ 122 $ 241 $ 363 Three Months Ended March 31, 2016 Term Rate Combination Total Commercial and industrial loans $ 260 $ 260 Agriculture production financing and other loans to farmers $ 331 331 Real estate loans: Commercial and farmland 351 351 Residential 123 123 Individuals loans for household and other personal expenditures 13 13 Total $ 467 $ 611 $ 1,078
Troubled debt restructurings that subsequently defaulted	The following tables summarize troubled debt restructures that occurred during the twelve months ended March 31, 2017 , that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this discussion, a loan is considered in default if it is 30 or more days past due. Three Months Ended March 31, 2017 Number of Recorded Real estate loans: Commercial and farmland 1 $ 223 Total 1 $ 223 Three Months Ended March 31, 2016 Number of Recorded Commercial and industrial loans 3 $ 260 Real estate loans: Commercial and farmland 1 717 Total 4 $ 977

Accounting for Certain Loans 31

Accounting for Certain Loans Acquired in a Purchase (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Schedule of outstanding balance and carrying amount of loans acquired during the period	The following tables include the outstanding balance and carrying amount of all acquired loans which were included in the Corporation's balance sheet at March 31, 2017 , and December 31, 2016 . March 31, 2017 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 6,888 $ 80 $ 2,100 $ 16,181 $ 3,267 $ 28,516 Agricultural production financing and other loans to farmers 1,551 50 1,134 2,735 Real estate loans: Construction 10,953 2,376 2,844 128 16,301 Commercial and farmland 104,227 21,913 34,218 111,601 8,374 280,333 Residential 98,987 41,744 8,985 91,291 3,820 244,827 Home Equity 10,747 7,669 5,745 25,562 11,797 61,520 Individuals' loans for household and other personal expenditures 650 1 127 181 27 986 Other commercial loans 1,808 64 1,872 Total $ 234,260 $ 73,783 $ 55,570 $ 245,058 $ 28,419 $ 637,090 Carrying Amount $ 226,292 $ 71,983 $ 51,632 $ 233,356 $ 25,461 $ 608,724 Allowance 412 77 102 591 Carrying Amount Net of Allowance $ 225,880 $ 71,983 $ 51,555 $ 233,254 $ 25,461 $ 608,133 December 31, 2016 Ameriana C Financial Community CFS SCB Total Outstanding Balance: Commercial and industrial loans $ 8,003 $ 85 $ 2,269 $ 23,327 $ 3,552 $ 37,236 Agricultural production financing and other loans to farmers 1,030 50 1,630 2,710 Real estate loans: Construction 22,017 2,835 4,026 420 29,298 Commercial and farmland 103,075 22,130 36,947 131,895 9,315 303,362 Residential 103,414 44,101 9,363 96,627 4,135 257,640 Home Equity 11,728 7,947 6,326 26,894 11,924 64,819 Individuals' loans for household and other personal expenditures 762 2 147 201 30 1,142 Other commercial loans 1,825 65 1,890 Total $ 250,824 $ 77,100 $ 60,108 $ 279,479 $ 30,586 $ 698,097 Carrying Amount $ 240,053 $ 75,194 $ 56,007 $ 266,845 $ 27,318 $ 665,417 Allowance 265 23 92 380 Carrying Amount Net of Allowance $ 239,788 $ 75,194 $ 55,984 $ 266,753 $ 27,318 $ 665,037
Schedule of accretable yield, or income expected to be collected, and reclassifications from nonaccretable yield	The accretable yield, or income expected to be collected, and reclassifications from nonaccretable yield, are identified in the tables below. The tables reflect only purchased loans accounted for under ASC 310-30 and not the entire portfolio of purchased loans. Three Months Ended March 31, 2017 Ameriana C Financial Community CFS SCB Total Beginning balance $ 1,630 $ 73 $ 1,233 $ 736 $ 279 $ 3,951 Additions Accretion (2,502 ) (40 ) (62 ) (470 ) (164 ) (3,238 ) Reclassification from nonaccretable 1,696 35 31 466 142 2,370 Disposals Ending balance $ 824 $ 68 $ 1,202 $ 732 $ 257 $ 3,083 Three Months Ended March 31, 2016 Ameriana C Financial Community CFS SCB Total Beginning balance $ 2,160 $ 114 $ 1,508 $ 1,188 $ 642 $ 5,612 Additions Accretion (40 ) (15 ) (63 ) (1,290 ) (88 ) (1,496 ) Reclassification from nonaccretable 1 11 1,135 36 1,183 Disposals Ending balance $ 2,120 $ 100 $ 1,456 $ 1,033 $ 590 $ 5,299

Goodwill (Tables)

Goodwill (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	2016 Balance, January 1 $ 243,129 Measurement period adjustment 871 Balance, December 31 $ 244,000

Core Deposit Intangibles (Table

Core Deposit Intangibles (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of core deposit	The carrying basis and accumulated amortization of recognized core deposit intangibles are noted below. March 31, 2017 December 31, 2016 Gross carrying amount $ 63,940 $ 61,798 Measurement period adjustment 2,142 Accumulated amortization (49,977 ) (49,074 ) Core deposit intangibles $ 13,963 $ 14,866
Schedule of estimated future amortization expense	Estimated future amortization expense is summarized as follows: Amortization Expense 2017 $ 2,711 2018 2,299 2019 1,914 2020 1,733 2021 1,611 After 2021 3,695 $ 13,963

Derivative Financial Instrume34

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair value of derivative financial instruments and their classification on 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 March 31, 2017 , and December 31, 2016 . Asset Derivatives Liability Derivatives March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 Balance Fair Balance Fair Balance Fair Balance Fair Derivatives designated as hedging instruments: Interest rate contracts Other Assets $ 6 Other Assets $ 15 Other Liabilities $ 1,916 Other Liabilities $ 2,182 Derivatives not designated as hedging instruments: Interest rate contracts Other Assets $ 6,373 Other Assets $ 6,295 Other Liabilities $ 6,373 Other Liabilities $ 6,295
Amount of gain (loss) recognized in other comprehensive income	The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated. Derivatives in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative Three Months Ended March 31, 2017 March 31, 2016 Interest Rate Products $ 34 $ (1,954 )
Schedule of derivative instruments, gain (loss) in Income Statement	The tables below present the effect of the Corporation’s derivative financial instruments on the Income Statement for the three months ended March 31, 2017 and 2016 . Derivatives Not Designated as Location of Gain (Loss) Amount of Gain (Loss) Recognized in Income on Derivative Three Months Ended Three Months Ended Interest rate contracts Other income $ — $ (245 ) The amount of gain (loss) reclassified from other comprehensive income into income is included in the table below for the periods indicated. Derivatives Designated as Location of Gain (Loss) Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion) Three Months Ended Three Months Ended Interest rate contracts Interest Expense (268 ) (324 )

Disclosures About Fair Value 35

Disclosures About Fair Value of Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair value measurements of assets and liabilities recognized in Consolidated Condensed Balance Sheets measured at fair value	The following table presents the fair value measurements of assets and liabilities recognized in the Consolidated Condensed Balance Sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at March 31, 2017 , and December 31, 2016 . Fair Value Measurements Using: March 31, 2017 Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Significant Available for sale securities: U.S. Treasury $ 747 $ 747 State and municipal 373,737 $ 370,493 $ 3,244 U.S. Government-sponsored mortgage-backed securities 322,699 322,699 Corporate obligations 31 31 Equity securities 33,574 31,558 2,012 4 Interest rate swap asset 6,373 6,373 Interest rate cap 6 6 Interest rate swap liability 8,289 8,289 Fair Value Measurements Using: December 31, 2016 Fair Value Quoted Prices in Significant Other Observable Inputs Significant Available for sale securities: U.S. Government-sponsored agency securities $ 100 $ 100 State and municipal 363,658 358,524 $ 5,134 U.S. Government-sponsored mortgage-backed securities 312,292 312,292 Corporate obligations 31 31 Equity securities 20,781 $ 18,765 2,012 4 Interest rate swap asset 6,295 6,295 Interest rate cap 15 15 Interest rate swap liability 8,477 8,477
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in Consolidated Condensed 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 Consolidated Condensed Balance Sheets using significant unobservable (Level 3) inputs for the three months ended March 31, 2017 and 2016. Available for Sale Securities Three Months Ended March 31, 2017 March 31, 2016 Balance at beginning of the period $ 5,169 $ 5,932 Included in other comprehensive income 11 38 Principal payments (1,901 ) (466 ) Ending balance $ 3,279 $ 5,504
Description of valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in Consolidated Condensed 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 March 31, 2017 , and December 31, 2016 . Fair Value Measurements Using March 31, 2017 Fair Value Quoted Prices in Significant Other Significant Unobservable Impaired loans (collateral dependent) $ 4,813 $ 4,813 Other real estate owned 207 207 Fair Value Measurements Using December 31, 2016 Fair Value Quoted Prices in Significant Other Significant Unobservable Impaired loans (collateral dependent) $ 15,318 $ 15,318 Other real estate owned 1,612 1,612
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 March 31, 2017 and December 31, 2016 . March 31, 2017 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 3,244 Discounted cash flow Maturity/Call date 1 month to 20 yrs US Muni BQ curve A- to BBB- Discount rate .69% - 5% Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR plus premium for illiquidity plus 200bps Impaired loans (collateral dependent) $ 4,813 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (2%) Other real estate owned $ 207 Appraisals Discount to reflect current market conditions 0% - 15% (14%) December 31, 2016 Fair Value Valuation Technique Unobservable Inputs Range (Weighted-Average) State and municipal securities $ 5,134 Discounted cash flow Maturity/Call date 1 month to 20 yrs US Muni BQ curve A- to BBB- Discount rate .69% - 5% Corporate obligations and Equity securities $ 35 Discounted cash flow Risk free rate 3 month LIBOR plus premium for illiquidity plus 200bps Impaired loans (collateral dependent) $ 15,318 Collateral based measurements Discount to reflect current market conditions and ultimate collectability 0% - 10% (1%) Other real estate owned $ 1,612 Appraisals Discount to reflect current market conditions 0% - 10% (9%)
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 March 31, 2017 , and December 31, 2016 . March 31, 2017 Quoted Prices in Active Markets Significant Significant Unobservable Carrying Amount (Level 1) (Level 2) (Level 3) Assets: Cash and cash equivalents $ 104,247 $ 104,247 Interest-bearing time deposits 20,439 20,439 Investment securities available for sale 730,788 32,306 $ 695,203 $ 3,279 Investment securities held to maturity 596,429 588,185 13,906 Loans held for sale 1,262 1,262 Loans 5,206,684 5,076,999 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap and cap asset 6,379 6,379 Interest receivable 25,174 25,174 Liabilities: Deposits $ 5,635,309 $ 4,426,558 $ 1,191,782 Borrowings: Federal funds purchased 102,000 102,000 Securities sold under repurchase agreements 139,007 138,965 Federal Home Loan Bank advances 338,919 337,655 Subordinated debentures and term loans 128,862 106,584 Interest rate swap liability 8,289 8,289 Interest payable 3,875 3,875 December 31, 2016 Quoted Prices in Active Markets Significant Significant Unobservable Carrying Amount (Level 1) (Level 2) (Level 3) Assets: Cash and cash equivalents $ 127,927 $ 127,927 Interest-bearing time deposits 24,459 24,459 Investment securities available for sale 696,862 18,765 $ 672,928 $ 5,169 Investment securities held to maturity 607,643 597,246 14,687 Loans held for sale 2,929 2,929 Loans 5,073,608 4,933,552 Federal Home Loan Bank stock 17,964 17,964 Interest rate swap and cap asset 6,310 6,310 Interest receivable 26,194 26,194 Liabilities: Deposits $ 5,556,498 $ 4,427,605 $ 1,111,491 Borrowings: Federal funds purchased 120,349 120,349 Securities sold under repurchase agreements 146,480 146,449 Federal Home Loan Bank advances 298,923 297,465 Subordinated debentures and term loans 128,445 105,930 Interest rate swap liability 8,477 8,477 Interest payable 3,110 3,110

Transfers Accounted for as Se36

Transfers Accounted for as Secured Borrowings (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 were: March 31, 2017 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 $ 125,301 $ 1,337 $ 4,773 $ 7,596 $ 139,007 December 31, 2016 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater Than 90 Days Total U.S. Government-sponsored mortgage-backed securities $ 129,617 $ 1,337 $ 10,253 $ 5,273 $ 146,480

Accumulated Other Comprehensi37

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and 2016 : Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans Total Balance at December 31, 2016 $ 1,035 $ (1,774 ) $ (12,842 ) $ (13,581 ) Other comprehensive income before reclassifications 10,110 23 10,133 Amounts reclassified from accumulated other comprehensive income (389 ) 174 (59 ) (274 ) Period change 9,721 197 (59 ) 9,859 Balance at March 31, 2017 $ 10,756 $ (1,577 ) $ (12,901 ) $ (3,722 ) Balance at December 31, 2015 $ 12,325 $ (2,347 ) $ (11,340 ) $ (1,362 ) Other comprehensive income before reclassifications 5,135 (1,270 ) 3,865 Amounts reclassified from accumulated other comprehensive income (648 ) 211 (437 ) Period change 4,487 (1,059 ) — 3,428 Balance at March 31, 2016 $ 16,812 $ (3,406 ) $ (11,340 ) $ 2,066
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 three months ended March 31, 2017 and 2016 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended March 31, Details about Accumulated Other Comprehensive Income (Loss)Components 2017 2016 Affected Line Item in the Statements of Income Unrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $ 598 $ 997 Other income - net realized gains on sales of available for sale securities Related income tax expense (209 ) (349 ) Income tax expense $ 389 $ 648 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $ (268 ) $ (324 ) Interest expense - subordinated debentures and term loans Related income tax benefit 94 113 Income tax expense $ (174 ) $ (211 ) Unrealized gains (losses) on defined benefit plans Amortization of prior service costs $ 91 Other expenses - salaries and employee benefits Related income tax expense (32 ) Income tax expense $ 59 $ — Total reclassifications for the period, net of tax $ 274 $ 437 (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 3. INVESTMENT SECURITIES, included within the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q. (2) For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see NOTE 8. DERIVATIVE FINANCIAL INSTRUMENTS, included within the Notes to Consolidated Condensed Financial Statements of this Quarterly Report on Form 10-Q.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Components of share-based compensation awards	The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense and the income tax benefit of such awards. The income tax benefit increase in the three months ended March 31, 2017 is due to the implementation of ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . This ASU requires all income tax effects of awards to be recognized as income tax expense or benefit in the income statement when the awards vest or are settled. Implementation of the ASU was effective January 1, 2017 and resulted in approximately $772,000 of income tax benefit in the first quarter. Three Months Ended 2017 2016 Stock and ESPP Options Pre-tax compensation expense $ 48 $ 15 Income tax expense (benefit) (246 ) Stock and ESPP option expense, net of income taxes $ (198 ) $ 15 Restricted Stock Awards Pre-tax compensation expense $ 525 $ 578 Income tax benefit (710 ) (202 ) Restricted stock awards expense, net of income taxes $ (185 ) $ 376 Total Share-Based Compensation Pre-tax compensation expense $ 573 $ 593 Income tax benefit (956 ) (202 ) Total share-based compensation expense, net of income taxes $ (383 ) $ 391
Stock option activity under stock option plans	Stock option activity under the Corporation's stock option plans as of March 31, 2017 and changes during the three months ended March 31, 2017 , were as follows: Number of Weighted-Average Exercise Price Weighted Average Remaining Aggregate Outstanding at January 1, 2017 260,211 $ 19.26 Granted Exercised (80,835 ) $ 22.76 Canceled Outstanding March 31, 2017 179,376 $ 17.68 2.86 3,882,228 Vested and Expected to Vest at March 31, 2017 179,376 $ 17.68 2.86 3,882,228 Exercisable at March 31, 2017 179,376 $ 17.68 2.86 3,882,228
Unvested RSAs outstanding	The following table summarizes information on unvested RSAs outstanding as of March 31, 2017 : Number of Shares Weighted-Average Unvested RSAs at January 1, 2017 328,347 $ 22.87 Granted 3,332 $ 39.32 Vested (76,951 ) $ 20.43 Forfeited (2,682 ) $ 23.02 Unvested RSAs at March 31, 2017 252,046 $ 23.83

Income Tax (Tables)

Income Tax (Tables)	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Summary of differences between income taxes at federal statutory tax rate and effective tax rate	The following table summarizes the major components creating differences between income taxes at the federal statutory and the effective tax rate recorded in the consolidated statements of income for the three months ended March 31, 2017 and 2016 : Three Months Ended 2017 2016 Reconciliation of Federal Statutory to Actual Tax Expense: Federal statutory income tax at 35% $ 10,627 $ 8,143 Tax-exempt interest income (2,549 ) (2,026 ) Share-based compensation (755 ) 2 Earnings on life insurance (314 ) (517 ) Tax credits (132 ) (129 ) Other 291 101 Actual Tax Expense $ 7,168 $ 5,574 Effective Tax Rate 23.6 % 24.0 %

Net Income Per Share (Tables)

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Basic and diluted net income per share	The following table reconciles basic and diluted net income per share for the three months ended March 31, 2017 and 2016 . Three Months Ended March 31, 2017 2016 Net Income Weighted-Average Shares Per Share Net Income Weighted-Average Shares Per Share Net income available to common stockholders 23,193 40,984,481 $ 0.57 17,693 40,690,573 $ 0.43 Effect of dilutive stock options and warrants 236,105 226,399 Diluted net income per share $ 23,193 41,220,586 $ 0.56 $ 17,693 40,916,972 $ 0.43

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - Ameriana $ in Thousands, shares in Millions	Dec. 31, 2015USD ($)bankshares
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%
Number of banking centers acquired | bank	13
Stock issued as a part of acquisition (in shares) | shares	2.8
Less: Common stock issued	$ 70,400
Core deposit intangible	$ 5,342
Acquired intangible asset, expected useful life	10 years
Common Stock
Business Acquisition [Line Items]
Number of shares of common stock	0.9037

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 244,000	$ 244,000	$ 243,129
Ameriana
Business Acquisition [Line Items]
Cash and cash equivalents			4,068
Interest-bearing time deposits			8,790
Investment securities			61,754
Loans			316,929
Premises and equipment			13,946
Federal Home Loan Bank stock			2,693
Other real estate owned			5,613
Interest receivable			1,306
Cash surrender value of life insurance			28,188
Other assets			6,713
Deposits			(383,718)
Interest payable			(24)
Federal Home Loan Bank Advances			(24,884)
Subordinated debentures			(5,487)
Other liabilities			(9,451)
Net tangible assets acquired			26,436
Core deposit intangible			5,342
Goodwill			38,624
Purchase price			$ 70,402

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Approximate Fair Value of Securities (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Available for sale securities
Amortized Cost	$ 715,055,000	$ 696,189,000
Gross Unrealized Gains	22,835,000	10,347,000
Gross Unrealized Losses	7,102,000	9,674,000
Fair Value	730,788,000	696,862,000
Held to maturity securities
Total Investment Securities	596,429,000	607,643,000
Gross Unrealized Gains	9,037,000	8,092,000
Gross Unrealized Losses	3,375,000	3,802,000
Fair Value	602,091,000	611,933,000
Amortized Cost	1,311,484,000	1,303,832,000
Gross Unrealized Gains	31,872,000	18,439,000
Gross Unrealized Losses	10,477,000	13,476,000
Fair Value	1,332,879,000	1,308,795,000
U.S. Treasury
Available for sale securities
Amortized Cost	747,000
Fair Value	747,000
U.S. Government-sponsored agency securities
Available for sale securities
Amortized Cost		100,000
Gross Unrealized Gains
Gross Unrealized Losses	0
Fair Value		100,000
Held to maturity securities
Total Investment Securities		22,619,000
Gross Unrealized Losses	458,000	479,000
Fair Value		22,140,000
State and municipal
Available for sale securities
Amortized Cost	368,545,000	360,779,000
Gross Unrealized Gains	9,345,000	8,443,000
Gross Unrealized Losses	4,153,000	5,564,000
Fair Value	373,737,000	363,658,000
Held to maturity securities
Total Investment Securities	231,129,000	224,811,000
Gross Unrealized Gains	4,096,000	3,136,000
Gross Unrealized Losses	1,386,000	1,796,000
Fair Value	233,839,000	226,151,000
U.S. Government-sponsored mortgage-backed securities
Available for sale securities
Amortized Cost	323,912,000	313,459,000
Gross Unrealized Gains	1,736,000	1,904,000
Gross Unrealized Losses	2,949,000	3,071,000
Fair Value	322,699,000	312,292,000
Held to maturity securities
Total Investment Securities	342,682,000	360,213,000
Gross Unrealized Gains	4,941,000	4,956,000
Gross Unrealized Losses	1,531,000	1,527,000
Fair Value	346,092,000	363,642,000
Corporate obligations
Available for sale securities
Amortized Cost	31,000	31,000
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	31,000	31,000
Equity securities
Available for sale securities
Amortized Cost	21,820,000	21,820,000
Gross Unrealized Gains	11,754,000
Gross Unrealized Losses		1,039,000
Fair Value	33,574,000	$ 20,781,000
U.S. Government-sponsored agency securities
Held to maturity securities
Total Investment Securities	22,618,000
Gross Unrealized Gains
Gross Unrealized Losses	458,000
Fair Value	$ 22,160,000

Investment Securities - Amort44

Investment Securities - Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 3,604	$ 2,703
Due after one through five years	10,687	16,359
Due after five through ten years	57,708	60,614
Due after ten years	297,324	281,234
Total debt securities with a single maturity date	369,323	360,910
Total Investment Securities	715,055	696,189
Fair Value
Due in one year or less	3,643	2,717
Due after one through five years	11,260	17,068
Due after five through ten years	59,851	62,241
Due after ten years	299,761	281,763
Total debt securities with a single maturity date	374,515	363,789
Total Investment Securities	730,788	696,862
Amortized Cost
Due in one year or less	4,771	2,046
Due after one through five years	70,442	61,921
Due after five through ten years	51,387	61,606
Due after ten years	127,147	121,857
Total debt securities with a single maturity date	253,747	247,430
Total Investment Securities	596,429	607,643
Fair Value
Due in one year or less	4,825	2,047
Due after one through five years	71,687	63,193
Due after five through ten years	51,438	61,145
Due after ten years	128,049	121,906
Total debt securities with a single maturity date	255,999	248,291
Investment securities held to maturity	602,091	611,933
U.S. Government-sponsored mortgage-backed securities
Amortized Cost
Without single maturity date	323,912	313,459
Fair Value
Without single maturity date	322,699	312,292
Amortized Cost
Without single maturity date	342,682	360,213
Total Investment Securities	342,682	360,213
Fair Value
Without single maturity date	346,092	363,642
Investment securities held to maturity	346,092	363,642
Equity securities
Amortized Cost
Without single maturity date	21,820	21,820
Fair Value
Without single maturity date	33,574	20,781
Amortized Cost
Without single maturity date
Fair Value
Without single maturity date

Investment Securities - Narrati

Investment Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2017USD ($)security	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Investments, Debt and Equity Securities [Abstract]
Carrying value of securities pledged as collateral	$ 551,860,000		$ 572,896,000
Book value of securities sold under agreements to repurchase	138,657,000		145,936,000
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Available-for-sale unrealized losses	7,102,000		9,674,000
Net realized gains on sales of available for sale securities	598,000	$ 997,000
Held-to-maturity unrealized losses	3,375,000		3,802,000
State and municipal
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Available-for-sale unrealized losses	$ 4,153,000		5,564,000
Available-for-sale, number of securities in unrealized loss positions | security	83
Held-to-maturity unrealized losses	$ 1,386,000		1,796,000
Held-to-maturity, number of securities in unrealized loss positions | security	51
U.S. Government-sponsored mortgage-backed securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Available-for-sale unrealized losses	$ 2,949,000		3,071,000
Available-for-sale, number of securities in unrealized loss positions | security	45
Held-to-maturity unrealized losses	$ 1,531,000		1,527,000
Held-to-maturity, number of securities in unrealized loss positions | security	31
U.S. Government-sponsored agency securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Available-for-sale unrealized losses	$ 0
Available-for-sale, number of securities in unrealized loss positions | security	0
Held-to-maturity unrealized losses	$ 458,000		$ 479,000
Held-to-maturity, number of securities in unrealized loss positions | security	5

Investment Securities - Gross G

Investment Securities - Gross Gains on Sales and Redemptions of Available for Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Sales and Redemptions of Available for Sale Securities:
Gross gains	$ 598	$ 997

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	Mar. 31, 2017	Dec. 31, 2016
Fair Value
Less than 12 Months	$ 293,519	$ 330,902
12 Months or Longer
Total	293,519	330,902
Gross Unrealized Losses
Less than 12 Months	7,102	9,674
12 Months or Longer
Total	7,102	9,674
Fair Value
Less than 12 Months	167,438	179,395
12 Months or Longer
Total	167,438	179,395
Gross Unrealized Losses
Less than 12 Months	3,375	3,802
12 Months or Longer
Total	3,375	3,802
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Less than 12 Months, Fair Value	460,957	510,297
12 Months or Longer, Fair Value
Total, Fair Value	460,957	510,297
Less than 12 Months, Gross Unrealized Losses	10,477	13,476
12 Months or Longer, Gross Unrealized Losses
Total, Gross Unrealized Losses	10,477	13,476
State and municipal
Fair Value
Less than 12 Months	109,641	126,593
12 Months or Longer
Total	109,641	126,593
Gross Unrealized Losses
Less than 12 Months	4,153	5,564
12 Months or Longer
Total	4,153	5,564
U.S. Government-sponsored mortgage-backed securities
Fair Value
Less than 12 Months	183,878	185,544
12 Months or Longer
Total	183,878	185,544
Gross Unrealized Losses
Less than 12 Months	2,949	3,071
12 Months or Longer
Total	2,949	3,071
Equity securities
Fair Value
Less than 12 Months		18,765
Total		18,765
Gross Unrealized Losses
Less than 12 Months		1,039
Total		1,039
U.S. Government-sponsored agency securities
Fair Value
Less than 12 Months	22,160
12 Months or Longer
Total	22,160
Gross Unrealized Losses
Less than 12 Months	458
12 Months or Longer
Total	458
U.S. Government-sponsored agency securities
Fair Value
Less than 12 Months		19,121
Total		19,121
Gross Unrealized Losses
Less than 12 Months		479
Total		479
State and municipal
Fair Value
Less than 12 Months	36,582	50,897
12 Months or Longer
Total	36,582	50,897
Gross Unrealized Losses
Less than 12 Months	1,386	1,796
12 Months or Longer
Total	1,386	1,796
U.S. Government-sponsored mortgage-backed securities
Fair Value
Less than 12 Months	108,696	109,377
12 Months or Longer
Total	108,696	109,377
Gross Unrealized Losses
Less than 12 Months	1,531	1,527
12 Months or Longer
Total	$ 1,531	$ 1,527

Investment Securities - Inves48

Investment Securities - Investments in Debt and Equity Securities Reported Less than Historical Cost (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Fair value	$ 460,957	$ 510,297
Investments reported at less than historical cost
Schedule of Investments [Line Items]
Historical cost	471,434	523,773
Fair value	$ 460,957	$ 510,297
Percent of the Corporation's available for sale and held to maturity portfolio	34.70%	39.10%

Loans and Allowance - Narrative

Loans and Allowance - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Loans held for sale	$ 1,262	$ 2,929
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of troubled debt restructured loans	66.00%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans with formal foreclosure proceedings	$ 1,104	$ 1,530

Loans and Allowance - Compositi

Loans and Allowance - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,274,909	$ 5,139,645
Allowance for loan losses	(68,225)	(66,037)	$ (62,086)	$ (62,453)
Net Loans	5,206,684	5,073,608
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,258,840	1,194,646
Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	77,021	79,689
Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	336,931	418,703
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,118,431	1,953,062
Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	737,918	739,169
Allowance for loan losses	(12,259)	(11,755)	(10,856)	(11,139)
Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	423,708	418,525
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	77,590	77,479
Allowance for loan losses	(3,120)	(2,923)	(2,647)	(2,689)
Lease financing receivables, net of unearned income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	261	311
Allowance for loan losses	(2)	(2)	$ (2)	$ (2)
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 244,209	$ 258,061

Loans and Allowance - Changes i

Loans and Allowance - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for loan losses:
Beginning balance	$ 66,037	$ 62,453
Provision for losses	2,385	550
Recoveries on loans	1,268	1,634
Loans charged-off	(1,465)	(2,551)
Ending balance	68,225	62,086
Commercial
Allowance for loan losses:
Beginning balance	27,696	26,478
Provision for losses	1,197	139
Recoveries on loans	366	292
Loans charged-off	(735)	(645)
Ending balance	28,524	26,264
Commercial Real Estate
Allowance for loan losses:
Beginning balance	23,661	22,145
Provision for losses	247	214
Recoveries on loans	564	952
Loans charged-off	(152)	(994)
Ending balance	24,320	22,317
Consumer
Allowance for loan losses:
Beginning balance	2,923	2,689
Provision for losses	249	33
Recoveries on loans	101	78
Loans charged-off	(153)	(153)
Ending balance	3,120	2,647
Residential
Allowance for loan losses:
Beginning balance	11,755	11,139
Provision for losses	692	164
Recoveries on loans	237	312
Loans charged-off	(425)	(759)
Ending balance	12,259	10,856
Finance Leases
Allowance for loan losses:
Beginning balance	2	2
Provision for losses
Recoveries on loans
Loans charged-off
Ending balance	$ 2	$ 2

Loans and Allowance - Allowance

Loans and Allowance - Allowance for Credit Losses and Loan Portfolio by Loan Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Allowance Balances:
Individually evaluated for impairment	$ 1,182	$ 888
Collectively evaluated for impairment	67,043	65,149
Total Allowance for Loan Losses	68,225	66,037	$ 62,086	$ 62,453
Loan Balance [Abstract]
Individually evaluated for impairment	29,467	30,579
Collectively evaluated for impairment	5,213,049	5,065,844
Loans	5,274,909	5,139,645
Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans	32,393	43,222
Commercial
Allowance Balances:
Individually evaluated for impairment	36	37
Collectively evaluated for impairment	28,488	27,659
Total Allowance for Loan Losses	28,524	27,696	26,264	26,478
Loan Balance [Abstract]
Individually evaluated for impairment	3,314	4,762
Collectively evaluated for impairment	1,573,619	1,520,981
Loans	1,580,070	1,532,396
Commercial | Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans	3,137	6,653
Commercial Real Estate
Allowance Balances:
Individually evaluated for impairment	829	553
Collectively evaluated for impairment	23,491	23,108
Total Allowance for Loan Losses	24,320	23,661	22,317	22,145
Loan Balance [Abstract]
Individually evaluated for impairment	21,701	21,358
Collectively evaluated for impairment	2,405,977	2,315,686
Loans	2,455,362	2,371,765
Commercial Real Estate | Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans	27,684	34,721
Consumer
Allowance Balances:
Individually evaluated for impairment
Collectively evaluated for impairment	3,120	2,923
Total Allowance for Loan Losses	3,120	2,923	2,647	2,689
Loan Balance [Abstract]
Individually evaluated for impairment	8	9
Collectively evaluated for impairment	77,582	77,470
Loans	77,590	77,479
Consumer | Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans
Residential
Allowance Balances:
Individually evaluated for impairment	317	298
Collectively evaluated for impairment	11,942	11,457
Total Allowance for Loan Losses	12,259	11,755	10,856	11,139
Loan Balance [Abstract]
Individually evaluated for impairment	4,444	4,450
Collectively evaluated for impairment	1,155,610	1,151,396
Loans	1,161,626	1,157,694
Residential | Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans	1,572	1,848
Finance Leases
Allowance Balances:
Individually evaluated for impairment
Collectively evaluated for impairment	2	2
Total Allowance for Loan Losses	2	2	$ 2	$ 2
Loan Balance [Abstract]
Individually evaluated for impairment
Collectively evaluated for impairment	261	311
Loans	261	311
Finance Leases | Loans Acquired with Deteriorated Credit Quality
Allowance Balances:
Total Allowance for Loan Losses
Loan Balance [Abstract]
Loans

Loans and Allowance - Summary o

Loans and Allowance - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 27,920	$ 29,998
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,975	1,839
Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	665	1,329
Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	71	73
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	14,536	15,754
Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	9,284	9,523
Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,324	1,457
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 65	$ 23

Loans and Allowance - Composi54

Loans and Allowance - Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Unpaid Principal Balance
Impaired loans with no related allowance	$ 85,815		$ 100,416
Impaired loans with related allowance	4,411		4,963
Total Impaired Loans	90,226		105,379
Recorded Investment
Impaired loans with no related allowance	56,354		68,371
Impaired loans with related allowance	3,720		3,679
Total Impaired Loans	60,074		72,050
Related Allowance	888		612
Average Recorded Investment
Impaired loans with no related allowance	59,910	$ 90,462
Impaired loans with related allowance	3,726	5,313
Total Impaired Loans	63,636	95,775
Interest Income Recognized
Impaired loans with no related allowance	666	1,124
Impaired loans with related allowance		9
Total Impaired Loans	666	1,133
Commercial and industrial loans
Unpaid Principal Balance
Impaired loans with no related allowance	13,715		17,645
Recorded Investment
Impaired loans with no related allowance	5,786		10,074
Average Recorded Investment
Impaired loans with no related allowance	8,571	12,052
Impaired loans with related allowance		1,363
Interest Income Recognized
Impaired loans with no related allowance	48	109
Impaired loans with related allowance		9
Agricultural production financing and other loans to farmers
Unpaid Principal Balance
Impaired loans with no related allowance	14		757
Impaired loans with related allowance	660		660
Recorded Investment
Impaired loans with no related allowance	5		680
Impaired loans with related allowance	660		660
Related Allowance	36		36
Average Recorded Investment
Impaired loans with no related allowance	145	716
Impaired loans with related allowance	660	1,315
Interest Income Recognized
Impaired loans with no related allowance		1
Impaired loans with related allowance
Real estate loans - Construction
Unpaid Principal Balance
Impaired loans with no related allowance	589		5,946
Recorded Investment
Impaired loans with no related allowance			3,178
Average Recorded Investment
Impaired loans with no related allowance		4,262
Interest Income Recognized
Impaired loans with no related allowance		85
Commercial and farmland
Unpaid Principal Balance
Impaired loans with no related allowance	63,743		67,936
Impaired loans with related allowance	3,686		4,238
Recorded Investment
Impaired loans with no related allowance	46,185		49,731
Impaired loans with related allowance	3,026		2,985
Related Allowance	829		553
Average Recorded Investment
Impaired loans with no related allowance	46,680	65,461
Impaired loans with related allowance	3,032	1,756
Interest Income Recognized
Impaired loans with no related allowance	577	871
Impaired loans with related allowance
Real estate loans - Residential
Unpaid Principal Balance
Impaired loans with no related allowance	7,664		8,039
Impaired loans with related allowance	65		65
Recorded Investment
Impaired loans with no related allowance	4,335		4,664
Impaired loans with related allowance	34		34
Related Allowance	23		23
Average Recorded Investment
Impaired loans with no related allowance	4,471	7,746
Impaired loans with related allowance	34	879
Interest Income Recognized
Impaired loans with no related allowance	41	58
Impaired loans with related allowance
Real estate loans - Home equity
Unpaid Principal Balance
Impaired loans with no related allowance	82		82
Recorded Investment
Impaired loans with no related allowance	43		44
Average Recorded Investment
Impaired loans with no related allowance	43	225
Interest Income Recognized
Impaired loans with no related allowance
Other commercial loans
Unpaid Principal Balance
Impaired loans with no related allowance	8		11
Recorded Investment
Impaired loans with no related allowance

Loans and Allowance - Credit Qu

Loans and Allowance - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 5,274,909	$ 5,139,645
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,258,840	1,194,646
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	77,021	79,689
Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	336,931	418,703
Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	2,118,431	1,953,062
Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	737,918	739,169
Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	423,708	418,525
Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment [Line Items]
Loans	77,590	77,479
Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment [Line Items]
Loans	261	311
Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	244,209	258,061
Commercial Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	3,899,025	3,769,920
Commercial Pass | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,190,546	1,117,545
Commercial Pass | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	23,236	30,712
Commercial Pass | Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	319,724	398,646
Commercial Pass | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,963,654	1,811,367
Commercial Pass | Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	148,677	146,251
Commercial Pass | Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	9,588	7,310
Commercial Pass | Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment [Line Items]
Loans	261	228
Commercial Pass | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	243,339	257,861
Commercial Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	134,800	124,863
Commercial Special Mention | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	25,537	30,919
Commercial Special Mention | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	34,044	25,273
Commercial Special Mention | Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	5,138	3,490
Commercial Special Mention | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	65,537	60,028
Commercial Special Mention | Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	4,497	5,106
Commercial Special Mention | Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	47	47
Commercial Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	156,654	159,215
Commercial Substandard | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	42,757	46,182
Commercial Substandard | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment [Line Items]
Loans	19,741	23,704
Commercial Substandard | Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	58	1,858
Commercial Substandard | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	87,197	80,626
Commercial Substandard | Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	5,679	6,046
Commercial Substandard | Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	352	516
Commercial Substandard | Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment [Line Items]
Loans		83
Commercial Substandard | Other commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	870	200
Commercial Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	1,687
Commercial Doubtful | Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial Doubtful | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	1,687
Commercial Loss
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	1,073,584	1,076,417
Consumer Performing | Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	11,940	14,636
Consumer Performing | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	351	1,034
Consumer Performing | Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	571,451	574,054
Consumer Performing | Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	412,339	409,237
Consumer Performing | Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment [Line Items]
Loans	77,503	77,456
Consumer Non-Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	9,159	9,230
Consumer Non-Performing | Real estate loans - Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	71	73
Consumer Non-Performing | Commercial and farmland
Financing Receivable, Recorded Investment [Line Items]
Loans	5	7
Consumer Non-Performing | Real estate loans - Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	7,614	7,712
Consumer Non-Performing | Real estate loans - Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	1,382	1,415
Consumer Non-Performing | Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 87	$ 23

Loans and Allowance - Past Due

Loans and Allowance - Past Due Aging of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 5,233,417	$ 5,095,918
Non-Accrual	27,920	29,998
Total Past Due & Non-Accrual	41,492	43,727
Total	5,274,909	5,139,645
Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,255,950	1,192,079
Non-Accrual	1,975	1,839
Total Past Due & Non-Accrual	2,890	2,567
Total	1,258,840	1,194,646
Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	75,251	78,360
Non-Accrual	665	1,329
Total Past Due & Non-Accrual	1,770	1,329
Total	77,021	79,689
Real estate loans - Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	336,027	415,975
Non-Accrual	71	73
Total Past Due & Non-Accrual	904	2,728
Total	336,931	418,703
Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,098,174	1,932,896
Non-Accrual	14,536	15,754
Total Past Due & Non-Accrual	20,257	20,166
Total	2,118,431	1,953,062
Real estate loans - Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	725,168	725,338
Non-Accrual	9,284	9,523
Total Past Due & Non-Accrual	12,750	13,831
Total	737,918	739,169
Real estate loans - Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	421,202	415,969
Non-Accrual	1,324	1,457
Total Past Due & Non-Accrual	2,506	2,556
Total	423,708	418,525
Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	77,175	76,929
Non-Accrual	65	23
Total Past Due & Non-Accrual	415	550
Total	77,590	77,479
Lease financing receivables, net of unearned income
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	261	311
Total	261	311
Other commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	244,209	258,061
Total Past Due & Non-Accrual
Total	244,209	258,061
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11,956	9,490
30-59 Days Past Due | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	915	466
30-59 Days Past Due | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,105
30-59 Days Past Due | Real estate loans - Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	833	2,655
30-59 Days Past Due | Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,076	1,385
30-59 Days Past Due | Real estate loans - Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,836	3,664
30-59 Days Past Due | Real estate loans - Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	906	850
30-59 Days Past Due | Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	285	470
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,493	4,127
60-89 Days Past Due | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		162
60-89 Days Past Due | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
60-89 Days Past Due | Real estate loans - Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
60-89 Days Past Due | Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	645	3,027
60-89 Days Past Due | Real estate loans - Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	630	635
60-89 Days Past Due | Real estate loans - Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	175	246
60-89 Days Past Due | Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	43	57
60-89 Days Past Due | Other commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Loans 90 Days And Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	123	112
Loans 90 Days And Accruing | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		100
Loans 90 Days And Accruing | Agricultural production financing and other loans to farmers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Loans 90 Days And Accruing | Real estate loans - Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Loans 90 Days And Accruing | Commercial and farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due
Loans 90 Days And Accruing | Real estate loans - Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		9
Loans 90 Days And Accruing | Real estate loans - Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	101	3
Loans 90 Days And Accruing | Individuals' loans for household and other personal expenditures
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 22

Loans and Allowance - Summary57

Loans and Allowance - Summary of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)loan	Mar. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 350	$ 1,203
Post-Modification Recorded Balance	$ 363	$ 1,089
Number of Loans | loan	5	10
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		$ 260
Post-Modification Recorded Balance		$ 260
Number of Loans | loan		3
Agricultural production financing and other loans to farmers
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		$ 465
Post-Modification Recorded Balance		$ 331
Number of Loans | loan		2
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 107	$ 352
Post-Modification Recorded Balance	$ 241	$ 352
Number of Loans | loan	3	1
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 121	$ 113
Post-Modification Recorded Balance	$ 122	$ 133
Number of Loans | loan	2	3
Real estate loans - Home Equity
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 122
Post-Modification Recorded Balance
Number of Loans | loan
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		$ 13
Post-Modification Recorded Balance		$ 13
Number of Loans | loan		1

Loans and Allowance - Summary58

Loans and Allowance - Summary of Troubled Debt Restructurings by Modification Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Modifications [Line Items]
Modification	$ 363	$ 1,078
Term Modification
Financing Receivable, Modifications [Line Items]
Modification
Rate Modification
Financing Receivable, Modifications [Line Items]
Modification	122	467
Combination
Financing Receivable, Modifications [Line Items]
Modification	241	611
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Modification		260
Commercial and industrial loans | Term Modification
Financing Receivable, Modifications [Line Items]
Modification
Commercial and industrial loans | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification
Commercial and industrial loans | Combination
Financing Receivable, Modifications [Line Items]
Modification		260
Agricultural production financing and other loans to farmers
Financing Receivable, Modifications [Line Items]
Modification		331
Agricultural production financing and other loans to farmers | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification		331
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Modification	241	351
Commercial and farmland | Term Modification
Financing Receivable, Modifications [Line Items]
Modification
Commercial and farmland | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification
Commercial and farmland | Combination
Financing Receivable, Modifications [Line Items]
Modification	241	351
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Modification	122	123
Real estate loans - Residential | Term Modification
Financing Receivable, Modifications [Line Items]
Modification
Real estate loans - Residential | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification	122	123
Real estate loans - Residential | Combination
Financing Receivable, Modifications [Line Items]
Modification
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Modification		13
Individuals' loans for household and other personal expenditures | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification		13
Individuals' loans for household and other personal expenditures | Combination
Financing Receivable, Modifications [Line Items]
Modification

Loans and Allowance - Subsequen

Loans and Allowance - Subsequent Default (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)loan	Mar. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	4
Recorded Balance | $	$ 223	$ 977
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		3
Recorded Balance | $		$ 260
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	1
Recorded Balance | $	$ 223	$ 717

Accounting for Certain Loans 60

Accounting for Certain Loans Acquired in a Purchase - Carrying Amount of Loans Included in Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	$ 637,090	$ 698,097
Carrying Amount	608,724	665,417
Allowance	591	380
Loans acquired and accounted for under ASC 310-30, carrying amount	608,133	665,037
Loans Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	46,400	60,500
Loans acquired and accounted for under ASC 310-30, carrying amount	32,400	43,200
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	28,516	37,236
Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	2,735	2,710
Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	16,301	29,298
Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	280,333	303,362
Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	244,827	257,640
Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	61,520	64,819
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	986	1,142
Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	1,872	1,890
Ameriana
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	234,260	250,824
Carrying Amount	226,292	240,053
Allowance	412	265
Loans acquired and accounted for under ASC 310-30, carrying amount	225,880	239,788
Ameriana | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	6,888	8,003
Ameriana | Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance
Ameriana | Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	10,953	22,017
Ameriana | Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	104,227	103,075
Ameriana | Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	98,987	103,414
Ameriana | Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	10,747	11,728
Ameriana | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	650	762
Ameriana | Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	1,808	1,825
C Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	73,783	77,100
Carrying Amount	71,983	75,194
Loans acquired and accounted for under ASC 310-30, carrying amount	71,983	75,194
C Financial | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	80	85
C Financial | Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	2,376	2,835
C Financial | Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	21,913	22,130
C Financial | Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	41,744	44,101
C Financial | Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	7,669	7,947
C Financial | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	1	2
Community
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	55,570	60,108
Carrying Amount	51,632	56,007
Allowance	77	23
Loans acquired and accounted for under ASC 310-30, carrying amount	51,555	55,984
Community | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	2,100	2,269
Community | Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	1,551	1,030
Community | Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	2,844	4,026
Community | Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	34,218	36,947
Community | Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	8,985	9,363
Community | Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	5,745	6,326
Community | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	127	147
CFS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	245,058	279,479
Carrying Amount	233,356	266,845
Allowance	102	92
Loans acquired and accounted for under ASC 310-30, carrying amount	233,254	266,753
CFS | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	16,181	23,327
CFS | Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	50	50
CFS | Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	128	420
CFS | Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	111,601	131,895
CFS | Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	91,291	96,627
CFS | Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	25,562	26,894
CFS | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	181	201
CFS | Other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	64	65
SCB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	28,419	30,586
Carrying Amount	25,461	27,318
Loans acquired and accounted for under ASC 310-30, carrying amount	25,461	27,318
SCB | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	3,267	3,552
SCB | Agricultural production financing and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	1,134	1,630
SCB | Real estate loans - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance
SCB | Commercial and farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	8,374	9,315
SCB | Real estate loans - Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	3,820	4,135
SCB | Real estate loans - Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	11,797	11,924
SCB | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired and accounted for under ASC 310-30, outstanding balance	$ 27	$ 30

Accounting for Certain Loans 61

Accounting for Certain Loans Acquired in a Purchase - Accretable Yield or Income Expected to be Collected (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 3,951	$ 5,612
Accretion	(3,238)	(1,496)
Reclassification from nonaccretable	2,370	1,183
Disposals
Ending balance	3,083	5,299
Ameriana
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	1,630	2,160
Accretion	(2,502)	(40)
Reclassification from nonaccretable	1,696
Disposals
Ending balance	824	2,120
C Financial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	73	114
Accretion	(40)	(15)
Reclassification from nonaccretable	35	1
Disposals
Ending balance	68	100
Community
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	1,233	1,508
Accretion	(62)	(63)
Reclassification from nonaccretable	31	11
Disposals
Ending balance	1,202	1,456
CFS
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	736	1,188
Accretion	(470)	(1,290)
Reclassification from nonaccretable	466	1,135
Disposals
Ending balance	732	1,033
SCB
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	279	642
Accretion	(164)	(88)
Reclassification from nonaccretable	142	36
Disposals
Ending balance	$ 257	$ 590

Goodwill - Narrative (Details)

Goodwill - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Mar. 31, 2017	Dec. 31, 2015
Goodwill [Line Items]
Goodwill		$ 244,000	$ 244,000	$ 243,129
Goodwill, measurement period adjustment		$ 871
Ameriana
Goodwill [Line Items]
Goodwill				$ 38,624
Goodwill, measurement period adjustment	$ 871

Goodwill - Schedule of Goodwill

Goodwill - Schedule of Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 243,129
Measurement period adjustment	871
Goodwill, ending balance	$ 244,000

Core Deposit Intangibles - Narr

Core Deposit Intangibles - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Measurement period adjustment			$ 2,142
Ameriana
Finite-Lived Intangible Assets [Line Items]
Core deposit intangible				$ 5,342
Measurement period adjustment		$ 2,142

Core Deposit Intangibles - Sche

Core Deposit Intangibles - Schedule of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 63,940	$ 61,798
Measurement period adjustment		2,142
Accumulated amortization	(49,977)	(49,074)
Core deposit intangibles	$ 13,963	$ 14,866

Core Deposit Intangibles - Esti

Core Deposit Intangibles - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortization Expense
2,017	$ 2,711
2,018	2,299
2,019	1,914
2,020	1,733
2,021	1,611
After 2,021	3,695
Core deposit intangibles	$ 13,963	$ 14,866

Derivative Financial Instrume67

Derivative Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)interest_rate_swapinterest_rate_capinstrument	Dec. 31, 2016USD ($)interest_rate_swapinterest_rate_cap
Derivative [Line Items]
Estimated amount to be transferred from accumulated other comprehensive income to earnings	$ 893
Termination value of derivatives in a net liability position	3,317
Derivative collateral posted	8,706
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 312,621
Federal Home Loan Bank Advances
Derivative [Line Items]
Number of debt instruments held | instrument	3
Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Number of interest rate derivatives held | interest_rate_swap	5	5
Notional amount of interest rate derivatives	$ 56,000	$ 56,000
Cash Flow Hedging | Interest Rate Swap | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	26,000
Cash Flow Hedging | Interest Rate Swap | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 30,000
Cash Flow Hedging | Interest Rate Cap
Derivative [Line Items]
Number of interest rate derivatives held | interest_rate_cap	1	1
Notional amount of interest rate derivatives	$ 13,000	$ 13,000
Cash Flow Hedging | Interest Rate Cap | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 13,000

Derivative Financial Instrume68

Derivative Financial Instruments - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - Interest rate contracts - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives designated as hedging instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 6	$ 15
Derivatives designated as hedging instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	1,916	2,182
Derivatives not designated as hedging instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	6,373	6,295
Derivatives not designated as hedging instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 6,373	$ 6,295

Derivative Financial Instrume69

Derivative Financial Instruments - Effect of Derivative Financial Instruments on Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Products
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ 34	$ (1,954)

Derivative Financial Instrume70

Derivative Financial Instruments - Effect of Derivative Financial Instruments on Income Statement (Details) - Interest rate contracts - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivatives not designated as hedging instruments | Other income
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ 0	$ (245)
Derivatives designated as hedging instruments | Interest Expense
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from Other Comprehensive Income into Income (Effective Portion)	$ (268)	$ (324)

Disclosures About Fair Value 71

Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurements of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	$ 730,788	$ 696,862
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	32,306	18,765
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	695,203	672,928
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	3,279	5,169
Fair Value, Measurements, Recurring | Interest rate swap liability | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	8,289	8,477
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	747
Fair Value, Measurements, Recurring | U.S. Treasury | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities
Fair Value, Measurements, Recurring | U.S. Government-sponsored agency securities | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities		100
Fair Value, Measurements, Recurring | State and municipal | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	370,493	358,524
Fair Value, Measurements, Recurring | State and municipal | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	3,244	5,134
Fair Value, Measurements, Recurring | U.S. Government-sponsored mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	322,699	312,292
Fair Value, Measurements, Recurring | Corporate obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	31	31
Fair Value, Measurements, Recurring | Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	31,558	18,765
Fair Value, Measurements, Recurring | Equity securities | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	2,012	2,012
Fair Value, Measurements, Recurring | Equity securities | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	4	4
Fair Value, Measurements, Recurring | Interest rate swap asset | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate derivatives	6,373	6,295
Fair Value, Measurements, Recurring | Interest rate cap | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate derivatives	6	15
Fair Value, Measurements, Recurring | Fair Value | Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	8,289	8,477
Fair Value, Measurements, Recurring | Fair Value | U.S. Treasury
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	747
Fair Value, Measurements, Recurring | Fair Value | U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities		100
Fair Value, Measurements, Recurring | Fair Value | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	373,737	363,658
Fair Value, Measurements, Recurring | Fair Value | U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	322,699	312,292
Fair Value, Measurements, Recurring | Fair Value | Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	31	31
Fair Value, Measurements, Recurring | Fair Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	33,574	20,781
Fair Value, Measurements, Recurring | Fair Value | Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate derivatives	6,373	6,295
Fair Value, Measurements, Recurring | Fair Value | Interest rate cap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate derivatives	$ 6	$ 15

Disclosures About Fair Value 72

Disclosures About Fair Value of Assets and Liabilities - 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	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Available for Sale Securities
Balance at beginning of the period	$ 5,169	$ 5,932
Included in other comprehensive income	11	38
Principal payments	(1,901)	(466)
Ending balance	$ 3,279	$ 5,504

Disclosures About Fair Value 73

Disclosures About Fair Value of Assets and Liabilities - Transfers Between Levels (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Transfers in or out of Level 3	$ 0	$ 0

Disclosures About Fair Value 74

Disclosures About Fair Value of Assets and Liabilities - Valuation Methodologies Used for Instruments Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Impaired loans (collateral dependent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 4,813	$ 15,318
Impaired loans (collateral dependent) | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	4,813	15,318
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	207	1,612
Other real estate owned | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 207	$ 1,612

Disclosures About Fair Value 75

Disclosures About Fair Value of Assets and Liabilities - Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other Than Goodwill (Details) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
State and municipal securities | Discounted cash flow
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 3,244	$ 5,134
State and municipal securities | Discounted cash flow | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Maturity/Call date	1 month	1 month
US Muni BQ curve	A-	A-
Discount rate	0.69%	0.69%
State and municipal securities | Discounted cash flow | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Maturity/Call date	20 years	20 years
US Muni BQ curve	BBB-	BBB-
Discount rate	5.00%	5.00%
Corporate obligations and Equity securities | Discounted cash flow
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 35	$ 35
Risk free rate	3 month LIBOR	3 month LIBOR
Discount to reflect current market conditions	2.00%	2.00%
Impaired loans (collateral dependent) | Collateral based measurements
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 4,813	$ 15,318
Impaired loans (collateral dependent) | Collateral based measurements | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	0.00%	0.00%
Impaired loans (collateral dependent) | Collateral based measurements | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	10.00%	10.00%
Impaired loans (collateral dependent) | Collateral based measurements | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	2.00%	1.00%
Other real estate owned | Appraisals
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 207	$ 1,612
Other real estate owned | Appraisals | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions	0.00%	0.00%
Other real estate owned | Appraisals | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions	15.00%	10.00%
Other real estate owned | Appraisals | Weighted Average
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions	14.00%	9.00%

Disclosures About Fair Value 76

Disclosures About Fair Value of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Investment securities available for sale	$ 730,788	$ 696,862
Investment securities held to maturity	602,091	611,933
Loans held for sale	1,262	2,929
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	104,247	127,927
Interest-bearing time deposits	20,439	24,459
Investment securities available for sale	32,306	18,765
Liabilities:
Deposits	4,426,558	4,427,605
Significant Other Observable Inputs (Level 2)
Assets:
Investment securities available for sale	695,203	672,928
Investment securities held to maturity	588,185	597,246
Loans held for sale	1,262	2,929
Federal Home Loan Bank stock	17,964	17,964
Interest rate swap and cap asset	6,379	6,310
Interest receivable	25,174	26,194
Liabilities:
Deposits	1,191,782	1,111,491
Borrowings:
Federal funds purchased	102,000	120,349
Securities sold under repurchase agreements	138,965	146,449
Federal Home Loan Bank advances	337,655	297,465
Subordinated debentures and term loans	106,584	105,930
Interest rate swap liability	8,289	8,477
Interest payable	3,875	3,110
Significant Unobservable Inputs (Level 3)
Assets:
Investment securities available for sale	3,279	5,169
Investment securities held to maturity	13,906	14,687
Loans	5,076,999	4,933,552
Carrying Amount
Assets:
Cash and cash equivalents	104,247	127,927
Interest-bearing time deposits	20,439	24,459
Investment securities available for sale	730,788	696,862
Investment securities held to maturity	596,429	607,643
Loans held for sale	1,262	2,929
Loans	5,206,684	5,073,608
Federal Home Loan Bank stock	17,964	17,964
Interest rate swap and cap asset	6,379	6,310
Interest receivable	25,174	26,194
Liabilities:
Deposits	5,635,309	5,556,498
Borrowings:
Federal funds purchased	102,000	120,349
Securities sold under repurchase agreements	139,007	146,480
Federal Home Loan Bank advances	338,919	298,923
Subordinated debentures and term loans	128,862	128,445
Interest rate swap liability	8,289	8,477
Interest payable	$ 3,875	$ 3,110

Transfers Accounted for as Se77

Transfers Accounted for as Secured Borrowings (Details) - U.S. Government-sponsored mortgage-backed securities - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 139,007	$ 146,480
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	125,301	129,617
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	1,337	1,337
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	4,773	10,253
Greater Than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 7,596	$ 5,273

Accumulated Other Comprehensi78

Accumulated Other Comprehensive Income (Loss) - Changes in Balances of Each Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 901,657
Other comprehensive income before reclassifications	10,133	$ 3,865
Amounts reclassified from accumulated other comprehensive income	(274)	(437)
Period change	9,859	3,428
Ending balance	929,470
Total
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(13,581)	(1,362)
Period change	9,859
Ending balance	(3,722)	2,066
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss)
Beginning balance	1,035	12,325
Other comprehensive income before reclassifications	10,110	5,135
Amounts reclassified from accumulated other comprehensive income	(389)	(648)
Period change	9,721	4,487
Ending balance	10,756	16,812
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(1,774)	(2,347)
Other comprehensive income before reclassifications	23	(1,270)
Amounts reclassified from accumulated other comprehensive income	174	211
Period change	197	(1,059)
Ending balance	(1,577)	(3,406)
Unrealized Gains (Losses) on Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(12,842)	(11,340)
Other comprehensive income before reclassifications
Amounts reclassified from accumulated other comprehensive income	(59)
Period change	(59)	0
Ending balance	$ (12,901)	$ (11,340)

Accumulated Other Comprehensi79

Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Other income - net realized gains on sales of available for sale securities	$ 598	$ 997
Interest expense - subordinated debentures and term loans	1,817	1,785
Amortization of prior service costs	25,732	27,337
Income tax expense	(7,168)	(5,574)
Total reclassifications for the period, net of tax	274	437
Unrealized gains (losses) on available for sale securities
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	389	648
Unrealized gains (losses) on cash flow hedges
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(174)	(211)
Unrealized Gains (Losses) on Defined Benefit Plans
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	59
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period | 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	598	997
Income tax expense	(209)	(349)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period | Unrealized gains (losses) on cash flow hedges
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	94	113
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period | Unrealized gains (losses) on cash flow hedges | Interest rate contracts
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Interest expense - subordinated debentures and term loans	(268)	(324)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period | Unrealized Gains (Losses) on Defined Benefit Plans
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service costs	91
Income tax expense	(32)
Total reclassifications for the period, net of tax	$ 59	$ 0

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended		27 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of average closing price to be paid by employees	85.00%
Maximum common stock purchases through advance payroll deductions in a calendar year	$ 25,000
Share-based compensation	$ 573,000	$ 593,000
Options granted (in shares)			0
Forfeiture rate	2.80%
Income tax benefit from adoption of ASU 2016-09	$ 772,000
Unrecognized compensation expense related to stock options	0		$ 0
Aggregate intrinsic value of stock options exercised	1,823,000	77,000
Cash receipts of stock options exercised	$ 1,314,000	$ 73,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term	10 years
Stock options vesting percentage	100.00%
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
Outstanding DSUs (in shares)	252,046		252,046	328,347
Unrecognized compensation expense related to RSAs	$ 3,087,000		$ 3,087,000
Unrecognized compensation expense expected recognition period	1 year 6 months 20 days
DSUs | Non-employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding DSUs (in shares)	0		0
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock options	$ 0		$ 0
Grant date fair value of ESPP options	$ 48,000

Share-Based Compensation - Comp

Share-Based Compensation - Components of Share-Based Compensation Awards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 573	$ 593
Income tax expense (benefit)	(956)	(202)
Total share-based compensation expense, net of income taxes	(383)	391
Stock and ESPP Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	48	15
Income tax expense (benefit)	(246)
Total share-based compensation expense, net of income taxes	(198)	15
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	525	578
Income tax expense (benefit)	(710)	(202)
Total share-based compensation expense, net of income taxes	$ (185)	$ 376

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity under Stock Option Plans (Details)	3 Months Ended	27 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares	Mar. 31, 2017USD ($)$ / sharesshares
Number of Shares
Beginning balance (in shares) | shares	260,211
Granted (in shares) | shares		0
Exercised (in shares) | shares	(80,835)
Cancelled (in shares) | shares
Ending balance (in shares) | shares	179,376	179,376
Vested and Expected to Vest (in shares) | shares	179,376	179,376
Exercisable (in shares) | shares	179,376	179,376
Weighted-Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 19.26
Granted (in dollars per share) | $ / shares
Exercised (in dollars per share) | $ / shares	22.76
Cancelled (in dollars per share) | $ / shares
Ending balance (in dollars per share) | $ / shares	17.68	$ 17.68
Vested and Expected to Vest (in dollars per share) | $ / shares	17.68	17.68
Exercisable (in dollars per share) | $ / shares	$ 17.68	$ 17.68
Weighted Average Remaining Contractual Term (in Years)
Outstanding (term)	2 years 10 months 10 days
Vested and Expected to Vest (term)	2 years 10 months 10 days
Exercisable (term)	2 years 10 months 10 days
Aggregate Intrinsic Value
Outstanding | $	$ 3,882,228	$ 3,882,228
Vested and Expected to Vest | $	3,882,228	3,882,228
Exercisable | $	$ 3,882,228	$ 3,882,228

Share-Based Compensation - Unve

Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	328,347
Granted (in shares) | shares	3,332
Vested (in shares) | shares	(76,951)
Forfeited (in shares) | shares	(2,682)
Unvested RSAs, Ending Balance (in shares) | shares	252,046
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 22.87
Granted (in dollars per share) | $ / shares	39.32
Vested (in dollars per share) | $ / shares	20.43
Forfeited (in dollars per share) | $ / shares	23.02
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 23.83

Income Tax (Details)

Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reconciliation of Federal Statutory to Actual Tax Expense:
Federal statutory income tax rate	35.00%	35.00%
Federal statutory income tax at 35%	$ 10,627	$ 8,143
Tax-exempt interest income	(2,549)	(2,026)
Share-based compensation	(755)	2
Earnings on life insurance	(314)	(517)
Tax credits	(132)	(129)
Other	291	101
Actual Tax Expense	$ 7,168	$ 5,574
Effective Tax Rate	23.60%	24.00%

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
	Mar. 31, 2017	Mar. 31, 2016
Net Income
Net income available to common stockholders	$ 23,193	$ 17,693
Diluted net income per share	$ 23,193	$ 17,693
Weighted-Average Shares
Net income available to common stockholders (in shares)	40,984,481	40,690,573
Effect of dilutive stock options and warrants (in shares)	236,105	226,399
Diluted net income per share (in shares)	41,220,586	40,916,972
Per Share Amount
Net income available to common stockholders (in dollars per share)	$ 0.57	$ 0.43
Diluted net income per share (in dollars per share)	$ 0.56	$ 0.43

Net Income Per Share - Narrativ

Net Income Per Share - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options not included in the earnings per share calculation (in shares)	0	153,721

Consummation of Mergers (Detail

Consummation of Mergers (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 16, 2017	Jan. 24, 2017	Nov. 21, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Assets				$ 7,326,193		$ 7,211,611
Purchase of securities available for sale				68,819	$ 32,632
IALB
Business Acquisition [Line Items]
Shares purchased (in shares)			495,112
Percentage of interest acquired			12.10%
Purchase of securities available for sale			$ 19,800
Arlington Bank
Business Acquisition [Line Items]
Assets				292,000
IALB
Business Acquisition [Line Items]
Assets				$ 1,100,000
Arlington Bank
Business Acquisition [Line Items]
Purchase price per share (usd per share)		$ 36.46
Estimated transaction value		$ 75,800
IALB
Business Acquisition [Line Items]
Purchase price per share (usd per share)	$ 42.10
Estimated transaction value	$ 251,300

Subsequent Events (Details)

Subsequent Events (Details) - shares	May 01, 2017	Mar. 31, 2017	Dec. 31, 2016
Subsequent Event [Line Items]
Common Stock, authorized (in shares)		50,000,000	50,000,000
Subsequent event
Subsequent Event [Line Items]
Common Stock, authorized (in shares)	100,000,000