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Note 9 - Deposits (Details) - Interest Expense on Time 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 Time Deposits [Abstract] |  |  |
Interest bearing demand | $ 1,229 us-gaap_InterestExpenseDomesticDepositLiabilitiesDemand | $ 1,017 us-gaap_InterestExpenseDomesticDepositLiabilitiesDemand | $ 792 us-gaap_InterestExpenseDomesticDepositLiabilitiesDemand
Money market accounts | 8,627 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket | 7,034 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket | 5,938 us-gaap_InterestExpenseDomesticDepositLiabilitiesMoneyMarket
Saving accounts | 802 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings | 374 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings | 365 us-gaap_InterestExpenseDomesticDepositLiabilitiesSavings
Time deposits | 35,111 us-gaap_InterestExpenseDomesticDepositLiabilitiesTimeDeposit | 31,964 us-gaap_InterestExpenseDomesticDepositLiabilitiesTimeDeposit | 40,278 us-gaap_InterestExpenseDomesticDepositLiabilitiesTimeDeposit
Total | $ 45,769 us-gaap_InterestExpenseDomesticDepositLiabilities | $ 40,389 us-gaap_InterestExpenseDomesticDepositLiabilities | $ 47,373 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 demand 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 Amount of interest expense on time 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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