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Note 7 - Deposits (Details) - Interest Expense on Deposits (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Interest Expense on Deposits [Abstract] |  |  |
Time certificates, less than $100,000 | $ 1,042 us-gaap_InterestExpenseTimeDepositsLessThan100000 | $ 1,822 us-gaap_InterestExpenseTimeDepositsLessThan100000 | $ 2,706 us-gaap_InterestExpenseTimeDepositsLessThan100000
Time certificates, $100,000 or more | 972 us-gaap_InterestExpenseTimeDeposits100000OrMore | 1,601 us-gaap_InterestExpenseTimeDeposits100000OrMore | 2,226 us-gaap_InterestExpenseTimeDeposits100000OrMore
Money market | 15 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket | 40 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket | 72 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket
Savings | 330 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings | 350 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings | 331 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings
NOW | 3 us-gaap_InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits | 9 us-gaap_InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits | 16 us-gaap_InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits
Brokered Deposits | 2 us-gaap_InterestExpenseDomesticDepositLiabilitiesBrokered |  |
| $ 2,364 us-gaap_InterestExpenseDomesticDepositLiabilities | $ 3,822 us-gaap_InterestExpenseDomesticDepositLiabilities | $ 5,351 us-gaap_InterestExpenseDomesticDepositLiabilities

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- Definition Aggregate amount of all interest expense on domestic deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Amount of interest expense on domestic brokered deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Amount of interest expense on domestic money market demand account deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Amount of interest expense on domestic savings deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Interest expense incurred on the amount of Negotiable Order of Withdrawal (NOW). Interest-bearing transaction account that combines the payable on demand feature of checks and investment feature of savings accounts. A NOW account is functionally an interest paying checking account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Interest expense incurred on time deposits, including certificates of deposits, of $100,000 or more in domestic offices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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- Definition Interest expense incurred on time deposits, including certificates of deposits, less than $100,000 in domestic offices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 + Details
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