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Note 17 - New Authoritative Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 01, 2019 | Mar. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018
Operating Lease, Right-of-Use Asset |  |  | $ 42,400 | $ 0
Operating Lease, Liability, Total |  |  | $ 50,626 | $ 0
Accounting Standards Update 2016-02 [Member] |  |  |  |
Operating Lease, Right-of-Use Asset | $ 45,400 |  |  |
Operating Lease, Liability, Total | 54,000 |  |  |
Impact of Adoption of Accounting Standards Update |  | $ 2,716 |  |
Accounting Standards Update 2016-02 [Member] | Deferred Gain on Sale of Buildings Reclassified to Retained Earnings [Member] |  |  |  |
Impact of Adoption of Accounting Standards Update | $ 2,700 |  |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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