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Note 17 - Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  |  |  | Fair Value Measurements
(In thousands) |  | Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agencies |  | $ | 139,724 |  |  | $ | -- |  |  | $ | 139,724 |  |  | $ | -- |
Mortgage-backed securities |  |  | 1,187,317 |  |  |  | -- |  |  |  | 1,187,317 |  |  |  | -- |
States and political subdivisions |  |  | 143,165 |  |  |  | -- |  |  |  | 143,165 |  |  |  | -- |
Other securities |  |  | 119,311 |  |  |  | -- |  |  |  | 119,311 |  |  |  | -- |
Other assets held for sale |  |  | 165,780 |  |  |  | -- |  |  |  | -- |  |  |  | 165,780 |
Derivative asset |  |  | 3,634 |  |  |  | -- |  |  |  | 3,634 |  |  |  | -- |
Other liabilities held for sale |  |  | (157,366 | ) |  |  | -- |  |  |  | -- |  |  |  | (157,366 | )
Derivative liability |  |  | (3,068 | ) |  |  | -- |  |  |  | (3,068 | ) |  |  | -- |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | $ | 300 |  |  | $ | 300 |  |  | $ | -- |  |  | $ | -- |
U.S. Government agencies |  |  | 137,771 |  |  |  | -- |  |  |  | 137,771 |  |  |  | -- |
Mortgage-backed securities |  |  | 868,324 |  |  |  | -- |  |  |  | 868,324 |  |  |  | -- |
States and political subdivisions |  |  | 102,943 |  |  |  | -- |  |  |  | 102,943 |  |  |  | -- |
Other securities |  |  | 48,016 |  |  |  | -- |  |  |  | 48,016 |  |  |  | -- |
Assets held in trading accounts |  |  | 41 |  |  |  | -- |  |  |  | 41 |  |  |  | -- |
Derivative asset |  |  | 1,199 |  |  |  | -- |  |  |  | 1,199 |  |  |  | -- |
Derivative liability |  |  | (1,274 | ) |  |  | -- |  |  |  | (1,274 | ) |  |  | -- |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  |  |  | Fair Value Measurements Using
(In thousands) |  | Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans (1) (2) (collateral dependent) |  | $ | 11,229 |  |  | $ | -- |  |  | $ | -- |  |  | $ | 11,229 |
Foreclosed assets and other real estate owned (1) |  |  | 24,093 |  |  |  | -- |  |  |  | -- |  |  |  | 24,093 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans (1) (2) (collateral dependent) |  | $ | 17,154 |  |  | $ | -- |  |  | $ | -- |  |  | $ | 17,154 |
Foreclosed assets held for sale (1) |  |  | 17,806 |  |  |  | -- |  |  |  | -- |  |  |  | 17,806 |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | Carrying |  | Fair Value Measurements
(In thousands) |  | Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 598,042 |  |  | $ | 598,042 |  |  | $ | -- |  |  | $ | -- |  |  | $ | 598,042 |
Interest bearing balances due from banks - time |  |  | 3,314 |  |  |  | -- |  |  |  | 3,314 |  |  |  | -- |  |  |  | 3,314 |
Held-to-maturity securities |  |  | 368,058 |  |  |  | -- |  |  |  | 373,298 |  |  |  | -- |  |  |  | 373,298 |
Mortgage loans held for sale |  |  | 24,038 |  |  |  | -- |  |  |  | -- |  |  |  | 24,038 |  |  |  | 24,038 |
Interest receivable |  |  | 43,528 |  |  |  | -- |  |  |  | 43,528 |  |  |  | -- |  |  |  | 43,528 |
Legacy loans (net of allowance) |  |  | 5,663,941 |  |  |  | -- |  |  |  | -- |  |  |  | 5,646,505 |  |  |  | 5,646,505 |
Loans acquired (net of allowance) |  |  | 5,074,076 |  |  |  | -- |  |  |  | -- |  |  |  | 5,058,455 |  |  |  | 5,058,455 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-interest bearing transaction accounts |  |  | 2,665,249 |  |  |  | -- |  |  |  | 2,665,249 |  |  |  | -- |  |  |  | 2,665,249 |
Interest bearing transaction accounts and savings deposits |  |  | 6,494,896 |  |  |  | -- |  |  |  | 6,494,896 |  |  |  | -- |  |  |  | 6,494,896 |
Time deposits |  |  | 1,932,730 |  |  |  | -- |  |  |  | -- |  |  |  | 1,915,539 |  |  |  | 1,915,539 |
Federal funds purchased and securities sold under agreements to repurchase |  |  | 122,444 |  |  |  | -- |  |  |  | 122,444 |  |  |  | -- |  |  |  | 122,444 |
Other borrowings |  |  | 1,380,024 |  |  |  | -- |  |  |  | 1,381,365 |  |  |  | -- |  |  |  | 1,381,365 |
Subordinated debentures |  |  | 140,565 |  |  |  | -- |  |  |  | 136,474 |  |  |  | -- |  |  |  | 136,474 |
Interest payable |  |  | 4,564 |  |  |  | -- |  |  |  | 4,564 |  |  |  | -- |  |  |  | 4,564 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 285,659 |  |  | $ | 285,659 |  |  | $ | -- |  |  | $ | -- |  |  | $ | 285,659 |
Interest bearing balances due from banks - time |  |  | 4,563 |  |  |  | -- |  |  |  | 4,563 |  |  |  | -- |  |  |  | 4,563 |
Held-to-maturity securities |  |  | 462,096 |  |  |  | -- |  |  |  | 465,960 |  |  |  | -- |  |  |  | 465,960 |
Mortgage loans held for sale |  |  | 27,788 |  |  |  | -- |  |  |  | -- |  |  |  | 27,788 |  |  |  | 27,788 |
Interest receivable |  |  | 27,788 |  |  |  | -- |  |  |  | 27,788 |  |  |  | -- |  |  |  | 27,788 |
Legacy loans (net of allowance) |  |  | 4,290,921 |  |  |  | -- |  |  |  | -- |  |  |  | 4,305,165 |  |  |  | 4,305,165 |
Loans acquired (net of allowance) |  |  | 1,305,683 |  |  |  | -- |  |  |  | -- |  |  |  | 1,310,017 |  |  |  | 1,310,017 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-interest bearing transaction accounts |  |  | 1,491,676 |  |  |  | -- |  |  |  | 1,491,676 |  |  |  | -- |  |  |  | 1,491,676 |
Interest bearing transaction accounts and savings deposits |  |  | 3,956,483 |  |  |  | -- |  |  |  | 3,956,483 |  |  |  | -- |  |  |  | 3,956,483 |
Time deposits |  |  | 1,287,060 |  |  |  | -- |  |  |  | -- |  |  |  | 1,278,339 |  |  |  | 1,278,339 |
Federal funds purchased and securities sold under agreements to repurchase |  |  | 115,029 |  |  |  | -- |  |  |  | 115,029 |  |  |  | -- |  |  |  | 115,029 |
Other borrowings |  |  | 273,159 |  |  |  | -- |  |  |  | 292,367 |  |  |  | -- |  |  |  | 292,367 |
Subordinated debentures |  |  | 60,397 |  |  |  | -- |  |  |  | 55,318 |  |  |  | -- |  |  |  | 55,318 |
Interest payable |  |  | 1,668 |  |  |  | -- |  |  |  | 1,668 |  |  |  | -- |  |  |  | 1,668 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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