| **Accounting for Certain Loans Acquired in a Purchase (Tables)**                                                 | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
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| **Receivables [Abstract]**                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Schedule of outstanding balance and carrying amount of loans acquired during the period                          | The following table includes the outstanding balance and carrying amount of all acquired loans which were included in the Corporation's balance sheet at September 30, 2016, and December 31, 2015.September 30, 2016Ameriana C FinancialCommunityCFSSCBTotalCommercial and industrial loans$16,731 $90$3,239$30,553$3,790$54,403Agricultural production financing and other loans to farmers 2,223501,3053,578Real estate loans:  Construction30,800 3,2605,95348940,502Commercial and farmland110,195 22,44939,765147,89010,933331,232Residential105,173 46,69610,091101,6634,478268,101       Home Equity12,301 8,5117,03828,10112,28268,233Individuals' loans for household and other personal expenditures938 3203238341,416Other commercial loans1,825 671,892Total$277,963 $81,009$68,512$309,051$32,822$769,357 Carrying Amount$266,592 $78,972$64,149$294,759$29,243$733,715Allowance 22642664Carrying Amount Net of Allowance$266,592 $78,972$64,127$294,117$29,243$733,051December 31, 2015Ameriana C Financial CommunityCFSSCBTotalCommercial and industrial loans$21,888 $104 $6,769$52,060$4,620$85,441Agricultural production financing and other loans to farmers   1,7611,2883,049Real estate loans:    Construction23,365 6,214 10,43697640,991Commercial and farmland144,514 27,838 49,997189,37213,293425,014Residential123,231 55,856 21,886118,1056,063325,141       Home Equity14,261 9,144 8,23131,98613,43177,053Individuals' loans for household and other personal expenditures1,731 10 461443482,693Other commercial loans1,928   722,000Total$330,918 $99,166 $99,541$393,014$38,743$961,382   Carrying Amount$319,664 $96,829 $93,355$373,649$34,092$917,589Allowance   4149153Carrying Amount Net of Allowance$319,664 $96,829 $93,351$373,500$34,092$917,436 |
| 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 table below.  The table reflects only purchased loans accounted for under ASC 310-30 and not the entire portfolio of purchased loans.Three Months Ended September 30, 2016Ameriana C FinancialCommunityCFSSCBTotalBeginning balance$1,846 $81$1,345$904$451$4,627Additions Accretion(67) (18)(63)(665)(199)(1,012)Reclassification from nonaccretable4 152258572698Disposals Ending balance$1,783 $78$1,304$824$324$4,313 Nine Months Ended September 30, 2016Ameriana C FinancialCommunityCFSSCBTotalBeginning balance$2,160 $114$1,508$1,188$642$5,612Additions  Accretion(154) (104)(975)(2,810)(580)(4,623)Reclassification from nonaccretable9 687712,4572623,567Disposals(232) (11)(243)Ending balance$1,783 $78$1,304$824$324$4,313 Three Months Ended September 30, 2015C Financial Community CFSSCBTotalBeginning balance$133 $1,818 $1,732$758$4,441Additions  Accretion(8) (139) (1,058)(285)(1,490)Reclassification from nonaccretable  21 704235960Disposals  (140) (3)(143)Ending balance$125 $1,560 $1,375$708$3,768Nine Months Ended September 30, 2015C Financial Community CFSSCBTotalBeginning balance$2,122$2,400$868$5,390Additions$145145Accretion(20)(671)(2,977)(774)(4,442)Reclassification from nonaccretable2491,9636142,826Disposals(140)(11)(151)Ending balance$125$1,560$1,375$708$3,768                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |

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Schedule of Carrying Values of Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Table Text Block]
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Schedule of Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement [Table Text Block]
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