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Note 10 - Fair Values of Financial Instruments (Details) - Fair Value Hierarchy of Financial Instruments - USD ($) | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Financial assets: |  |  |
Securities available for sale | [1] | $ 367,173,000 | $ 432,912,000
FHLBI stock | [2] | 7,567,000 | 13,699,000
FHLBI stock | [2] | 7,567,000 | 13,699,000
Bank owned life insurance |  | 58,680,000 | 57,861,000
Financial liabilities: |  |  |
Deposits |  | 2,254,129,000 | 2,276,915,000
Repurchase agreements |  | 158,149,000 | 167,569,000
Accrued interest payable |  | 17,296,000 | 12,263,000
Interest Rate Swap [Member] |  |  |
Financial liabilities: |  |  |
Interest rate swap | [1] | 533,000 | 253,000
Interest rate swap | [1] | 533,000 | 253,000
Fair Value, Inputs, Level 1 [Member] |  |  |
Financial assets: |  |  |
Cash |  | 13,314,000 | 13,261,000
Cash |  | 13,314,000 | 13,261,000
Fair Value, Inputs, Level 2 [Member] |  |  |
Financial assets: |  |  |
Cash equivalents |  | 90,535,000 | 159,477,000
Cash equivalents |  | 90,535,000 | 159,477,000
Loans held for sale |  | 2,057,000 | 1,574,000
Loans held for sale |  | 2,057,000 | 1,574,000
Bank owned life insurance |  | 58,680,000 | 57,861,000
Bank owned life insurance |  | 58,680,000 | 57,861,000
Accrued interest receivable |  | 8,355,000 | 8,033,000
Accrued interest receivable |  | 8,355,000 | 8,033,000
Financial liabilities: |  |  |
Deposits |  | 2,254,129,000 | 2,276,915,000
Deposits |  | 2,214,078,000 | 2,254,749,000
Repurchase agreements |  | 158,149,000 | 167,569,000
Repurchase agreements |  | 158,149,000 | 167,569,000
FHLBI advances |  | 68,000,000 | 54,022,000
FHLBI advances |  | 68,883,000 | 54,720,000
Subordinated debentures |  | 54,983,000 | 54,472,000
Subordinated debentures |  | 55,049,000 | 54,508,000
Accrued interest payable |  | 1,554,000 | 1,942,000
Accrued interest payable |  | 1,554,000 | 1,942,000
Fair Value, Inputs, Level 3 [Member] |  |  |
Financial assets: |  |  |
Loans, net |  | 2,199,212,000 | 2,067,662,000
Loans, net |  | $ 2,200,805,000 | $ 2,062,566,000
[1] | See Note 11 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.
[2] | It is not practical to determine the fair value of FHLBI stock due to transferability restrictions.

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