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Note 2 - Mergers and Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2014
Business Combinations [Abstract] |
Certain Loans Acquired in Transfer [Table Text Block] |
(dollars in thousands) |  |  |  |
Accounted for under ASC 310-30: |  |  |  |
Contractual principal balance at acquisition |  | $ | 4,448 |
Contractual cash flows not expected to be collected (nonaccretable discount) |  |  | 1,191 |
Expected cash flows at acquisition at acquisition |  |  | 3,257 |
Interest component of expected cash flows (accretable discount) |  |  | - |
Fair value at acquisition |  | $ | 3,257 |
Excluded under ASC 310-30 accounting: |  |  |  |
Unpaid principal balance |  | $ | 812,681 |
Fair value discount |  |  | 11,618 |
Fair value at acquisition |  |  | 801,063 |
Total fair value at acquisition |  | $ | 804,320 |
Business Acquisition, Pro Forma Information [Table Text Block] |
|  | For the years ended December 31, |
(dollars in thousands) |  | 2014 |  |  | 2013 |
Net interest income |  | $ | 206,721 |  |  | $ | 174,509 |
Net income |  |  | 58,756 |  |  |  | 55,973 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 1.89 |  |  | $ | 1.86 |
Diluted |  | $ | 1.82 |  |  | $ | 1.81 |

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- Definition Tabular disclosure of the reconciliation of contractual cash flows to the carrying amount relating to certain loans acquired in a transfer, under ASC 310-30, as well as those excluded from ASC 310-30 guidance. + References No definition available. + Details
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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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