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Note 15 - Additional Cash Flow Information - Additional Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Interest paid | $ 39,384 | $ 22,069 | $ 21,700
Income taxes paid | 35,770 | 39,824 | 20,127
Transfers of Loans Not Covered by FDIC Loss Share to Foreclosed Assets Held-for-sale [Member] |  |  |
Real estate transferred | 6,983 | 4,604 | 16,456
Transfers of Loans Acquired Covered by FDIC Loss Share to Foreclosed Assets Covered by FDIC Loss Share [Member] |  |  |
Real estate transferred |  |  | 4,349
Transfers of Foreclosed Assets Covered by FDIC Loss Share to Foreclosed Assets Held for Sale [Member] |  |  |
Real estate transferred |  |  | 13,895
Transfers of Loans Acquired Covered by FDIC Loss Share, to Loans Acquired not Covered by FDIC Loss Share [Member] |  |  |
Real estate transferred |  |  | 88,922
Transfer of Premises to Foreclosed Assets and Other Real Estate Owned [Member] |  |  |
Real estate transferred | 5,422 |  |
Transfers of Premises Held-for-sale to Foreclosed Assets Held-for-sale [Member] |  |  |
Real estate transferred | $ 3,188 | $ 652 | $ 6,126

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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