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Note 2 - Acquisition (Details) - USD ($) $ in Thousands | Jul. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Note 2 - Acquisition (Details) [Line Items] |  |  |
Goodwill |  | $ 373,208 | $ 316,340
Asia Bancshares [Member] |  |  |
Note 2 - Acquisition (Details) [Line Items] |  |  |
Business Combination, Purchase Consideration, Percentage of Equity Interest | 55.00% |  |
Business Combination, Purchase Consideration, Percentage of Cash | 45.00% |  |
Business Combination, Consideration Transferred | $ 139,863 |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) | 2,580,359 |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned | $ 82,900 |  |
Payments to Acquire Businesses, Gross | 57,006 |  |
Goodwill | $ 56,867 |  |

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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