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Note 2 - Acquisition (Details) - Fair Value of Assets and Liabilities Acquired - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Assets acquired: |  |  |
Goodwill |  | $ 372,189 | $ 316,340
Asia Bancshares [Member] |  |  |
Assets acquired: |  |  |
Cash and cash equivalents | $ 63,579 | 63,579 |
Securities available-for-sale | 2,370 | 2,370 |
Loans | 419,219 | 419,219 |
Premises and equipment | 13,291 | 13,291 |
Other real estate owned | 3,048 | 3,048 |
Goodwill | 55,849 | 55,849 |
Core deposit intangible | 1,302 | 1,302 |
Accrued interest receivable and other assets | 2,884 | 2,884 |
Total assets acquired | 561,542 | 561,542 |
Liabilities assumed: |  |  |
Deposits | 420,623 | 420,623 |
Accrued interest payable and other liabilities | 1,056 | 1,056 |
Total liabilities assumed | 421,679 | 421,679 |
Net assets acquired | 139,863 | 139,863 |
Cash paid | 57,006 | 57,006 |
Fair value of common stock issued | 82,857 | 82,857 |
Total consideration paid | $ 139,863 | $ 139,863 |

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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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