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

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