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Note 17 - Fair Values of Financial Instruments (Details) - Fair Value Hierarchy of Financial Instruments - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financial assets |  |  |
Securities available for sale |  | $ 346,992,000 | $ 432,912,000
Federal Home Loan Bank stock | [1] | 7,567,000 | 13,699,000
Federal Home Loan Bank stock | [1] | 7,567,000 | 13,699,000
Bank owned life insurance |  | 58,971,000 | 57,861,000
Financial liabilities |  |  |
Deposits |  | 2,275,382,000 | 2,276,915,000
Securities sold under agreements to repurchase |  | 154,771,000 | 167,569,000
Accrued interest payable |  | 16,445,000 | 12,263,000
Interest Rate Swap [Member] |  |  |
Financial liabilities |  |  |
Interest rate swap | [2] | 253,000 | 253,000
Interest rate swap | [2] | 253,000 | 253,000
Fair Value, Inputs, Level 1 [Member] |  |  |
Financial assets |  |  |
Cash |  | 12,496,000 | 13,261,000
Cash |  | 12,496,000 | 13,261,000
Securities available for sale |  | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |
Financial assets |  |  |
Cash equivalents |  | 77,395,000 | 159,477,000
Cash equivalents |  | 77,395,000 | 159,477,000
Bank owned life insurance |  | 58,971,000 | 57,861,000
Bank owned life insurance |  | 58,971,000 | 57,861,000
Accrued interest receivable |  | 7,836,000 | 8,033,000
Accrued interest receivable |  | 7,836,000 | 8,033,000
Financial liabilities |  |  |
Deposits |  | 2,275,382,000 | 2,276,915,000
Deposits |  | 2,208,724,000 | 2,254,749,000
Securities sold under agreements to repurchase |  | 154,771,000 | 167,569,000
Securities sold under agreements to repurchase |  | 154,771,000 | 167,569,000
Federal Home Loan Bank advances |  | 68,000,000 | 54,022,000
Federal Home Loan Bank advances |  | 68,858,000 | 54,720,000
Subordinated debentures |  | 55,154,000 | 54,472,000
Subordinated debentures |  | 55,760,000 | 54,508,000
Accrued interest payable |  | 1,479,000 | 1,942,000
Accrued interest payable |  | 1,479,000 | 1,942,000
Fair Value, Inputs, Level 3 [Member] |  |  |
Financial assets |  |  |
Loans, net |  | 2,262,046,000 | 2,069,236,000
Loans, net |  | $ 2,261,026,000 | $ 2,064,140,000
[1] | It is not practical to determine the fair value of FHLBI stock due to transferability restrictions.
[2] | See Note 18 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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