| **Accounting for Certain Loans Acquired in a Purchase (Tables)**                                                 | 6 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 June 30, 2016, and December 31, 2015.June 30, 2016Ameriana C FinancialCommunityCFSSCBTotalCommercial and industrial loans$21,544 $95$5,613$49,079$4,408$80,739Agricultural production financing and other loans to farmers 2,802251,0473,874Real estate loans:  Construction32,597 5,0348,92362447,178Commercial and farmland120,330 25,02445,281164,74211,265366,642Residential112,520 48,78212,159107,8955,467286,823       Home Equity13,029 8,6467,72429,46412,48071,343Individuals' loans for household and other personal expenditures1,101 5238295381,677Other commercial loans1,840 691,909Total$302,961 $87,586$82,740$352,193$34,705$860,185 Carrying Amount$290,946 $85,505$77,933$336,031$30,743$821,158Allowance 18022202Carrying Amount Net of Allowance$290,946 $85,325$77,911$336,031$30,743$820,956December 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 June 30, 2016Ameriana C FinancialCommunityCFSSCBTotalBeginning balance$2,120 $100$1,456$1,033$590$5,299Additions Accretion(47) (71)(849)(855)(293)(2,115)Reclassification from nonaccretable5 527387371541,686Disposals(232) (11)(243)Ending balance$1,846 $81$1,345$904$451$4,627 Six Months Ended June 30, 2016Ameriana C FinancialCommunityCFSSCBTotalBeginning balance$2,160 $114$1,508$1,188$642$5,612Additions  Accretion(87) (86)(912)(2,145)(381)(3,611)Reclassification from nonaccretable5 537491,8721902,869Disposals(232) (11)(243)Ending balance$1,846 $81$1,345$904$451$4,627 Three Months Ended June 30, 2015C Financial Community CFSSCBTotalBeginning balance  $1,990 $2,009$818$4,817Additions$145  145Accretion(12) (353) (578)(304)(1,247)Reclassification from nonaccretable  181 309244734Disposals   (8)(8)Ending balance$133 $1,818 $1,732$758$4,441Six Months Ended June 30, 2015C Financial Community CFSSCBTotalBeginning balance$2,122$2,400$868$5,390Additions$145$145Accretion(12)(532)(1,919)(489)(2,952)Reclassification from nonaccretable2281,2593791,866Disposals(8)(8)Ending balance$133$1,818$1,732$758$4,441                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |

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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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