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Basis of Accounting and Consolidation Basis of Accounting and Consolidation 5 (Acquisitions) |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 08, 2016 USD ($) $ / shares shares | Sep. 30, 2016 USD ($) branch $ / shares shares | Dec. 31, 2015 USD ($) $ / shares | Aug. 14, 2015 USD ($) | Jun. 18, 2015 $ / shares
Agreement And Plan Of Merger FCLB [Abstract] |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 4 | $ 4 |  |
CS: Number of Shares, Par Value and Other (Capital Raise) [Abstract] |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  | 1,392,859 |  |  |
Shares Issued, Price Per Share | $ / shares |  |  |  |  | $ 21.00
Stock Issued During Period, Value, New Issues |  | $ 29,250,039 |  |  |
OldNationalBankBranches [Member] |  |  |  |  |
Branch Purchase and Assumption Agreement ONB [Abstract] |  |  |  |  |
Number of Businesses Acquired | branch |  | 12 |  |  |
Fair value of loans |  |  | $ 156,000,000 | $ 152,397,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  | $ 453,000,000 | $ 453,647,000 |
First Clover Leaf [Member] |  |  |  |  |
Branch Purchase and Assumption Agreement ONB [Abstract] |  |  |  |  |
Fair value of loans | $ 438,265,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | $ 536,686,000 |  |  |  |
Agreement And Plan Of Merger FCLB [Abstract] |  |  |  |  |
Percent Of Acquiree Outstanding Stock Being Acquired In Merger | 1.00 |  |  |  |
Percentage of business acquisition consideration paid in cash | 25.00% |  |  |  |
Right To Receive Value of Cash Option | $ / shares | $ 12.87 |  |  |  |
Aggregate Total Of Cash Paid In Business Combination | $ 22,545,000 |  |  |  |
Portion of Business Acquisition Consideration Paid In Common Stock | 75.00% |  |  |  |
Right To Receive Value Of Share Option | shares | 0.495 |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares | 2,600,616 |  |  |  |

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