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Business Combinations, Goodwill and Intangible Assets (Fair Value of Assets and Liabilities Acquired) (Details) - USD ($) $ in Thousands |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2018 | Oct. 14, 2018 | May 18, 2018 | Mar. 01, 2016 | Feb. 29, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Consideration |  |  |  |  |  |  |  |  |
Cash Consideration |  |  |  |  |  | $ 17,566 | $ 0 | $ 0 |
Total Cash Received from First Financial |  |  |  |  |  | 42,700 | 0 | 0 |
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed: |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 103,681 | $ 54,058 | $ 54,058 | $ 20,536
First Security |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |
Cash for Options and Fractional Shares | $ 132 | $ 124 |  |  |  |  |  |  |
Cash Consideration | 31,039 |  |  |  |  |  |  |  |
Equity Instruments | 64,898 | $ 29,886 |  |  |  |  |  |  |
Fair Value of Total Consideration Transferred | 96,069 |  |  |  |  |  |  |  |
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed: |  |  |  |  |  |  |  |  |
Cash | 13,605 |  |  |  |  |  |  |  |
Interest-bearing Time Deposits with Banks | 250 |  |  |  |  |  |  |  |
Securities | 109,580 |  |  |  |  |  |  |  |
Loans | 390,106 |  |  |  |  |  |  |  |
Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost | 2,607 |  |  |  |  |  |  |  |
Premises, Furniture & Equipment | 11,149 |  |  |  |  |  |  |  |
Other Real Estate | 468 |  |  |  |  |  |  |  |
Intangible Assets | 6,139 |  |  |  |  |  |  |  |
Company Owned Life Insurance | 13,135 |  |  |  |  |  |  |  |
Accrued Interest Receivable and Other Assets | 6,126 |  |  |  |  |  |  |  |
Deposits - Non-interest Bearing | (66,112) |  |  |  |  |  |  |  |
Deposits - Interest Bearing | (358,285) |  |  |  |  |  |  |  |
FHLB Advances and Other Borrowings | (73,275) |  |  |  |  |  |  |  |
Accrued Interest Payable and Other Liabilities | (2,200) |  |  |  |  |  |  |  |
Total Identifiable Net Assets | 53,293 |  |  |  |  |  |  |  |
Goodwill | $ 42,776 |  |  |  |  |  |  |  |
Branch Acquisition |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |
Total Cash Received from First Financial |  |  | $ 41,944 |  |  |  |  |  |
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed: |  |  |  |  |  |  |  |  |
Cash |  |  | 756 |  |  |  |  |  |
Loans |  |  | 116,305 |  |  |  |  |  |
Premises, Furniture & Equipment |  |  | 5,666 |  |  |  |  |  |
Intangible Assets |  |  | 3,475 |  |  |  |  |  |
Accrued Interest Receivable and Other Assets |  |  | 780 |  |  |  |  |  |
Deposits - Non-interest Bearing |  |  | (39,607) |  |  |  |  |  |
Deposits - Interest Bearing |  |  | (136,096) |  |  |  |  |  |
Accrued Interest Payable and Other Liabilities |  |  | (70) |  |  |  |  |  |
Total Identifiable Net Assets |  |  | (48,791) |  |  |  |  |  |
Goodwill |  |  | $ 6,847 |  |  |  |  |  |
River Valley |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |
Cash for Options and Fractional Shares |  |  |  | $ 395 | $ 395 |  |  |  |
Cash Consideration |  |  |  | 24,975 | $ 24,975 |  |  |  |
Equity Instruments |  |  |  | 62,022 |  |  |  |  |
Fair Value of Total Consideration Transferred |  |  |  | 87,392 |  |  |  |  |
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed: |  |  |  |  |  |  |  |  |
Cash |  |  |  | 17,877 |  |  |  |  |
Federal Funds Sold and Other Short-term Investments |  |  |  | 6,477 |  |  |  |  |
Interest-bearing Time Deposits with Banks |  |  |  | 992 |  |  |  |  |
Securities |  |  |  | 132,396 |  |  |  |  |
Loans |  |  |  | 317,760 |  |  |  |  |
Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost |  |  |  | 3,127 |  |  |  |  |
Premises, Furniture & Equipment |  |  |  | 9,650 |  |  |  |  |
Other Real Estate |  |  |  | 882 |  |  |  |  |
Intangible Assets |  |  |  | 2,613 |  |  |  |  |
Company Owned Life Insurance |  |  |  | 12,842 |  |  |  |  |
Accrued Interest Receivable and Other Assets |  |  |  | 9,139 |  |  |  |  |
Deposits - Non-interest Bearing |  |  |  | (9,584) |  |  |  |  |
Deposits - Interest Bearing |  |  |  | (395,862) |  |  |  |  |
FHLB Advances and Other Borrowings |  |  |  | (49,910) |  |  |  |  |
Accrued Interest Payable and Other Liabilities |  |  |  | (4,529) |  |  |  |  |
Total Identifiable Net Assets |  |  |  | 53,870 |  |  |  |  |
Goodwill |  |  |  | $ 33,522 |  |  |  |  |

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