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Note 14 - Income Taxes - Federal and State Income Tax Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Current federal income tax |  |  |  |  |  |  |  |  |  |  |  |  | $ 53,290 | $ 46,758 | $ 32,384
Current state income tax |  |  |  |  |  |  |  |  |  |  |  |  | 13,733 | 11,020 | 7,114
Total current |  |  |  |  |  |  |  |  |  |  |  |  | 67,023 | 57,778 | 39,498
Deferred federal income tax benefit |  |  |  |  |  |  |  |  |  |  |  |  | (5,523) | (6,642) | (7,494)
Deferred state income tax benefit |  |  |  |  |  |  |  |  |  |  |  |  | (105) | (87) | (46)
Total deferred |  |  |  |  |  |  |  |  |  |  |  |  | (5,628) | (6,729) | (7,540)
Total income tax expense | $ 16,429 | $ 15,484 | $ 15,069 | $ 14,413 | $ 13,485 | $ 13,054 | $ 12,776 | $ 11,734 | $ 9,347 | $ 8,054 | $ 7,618 | $ 6,939 | $ 61,395 | $ 51,049 | $ 31,958

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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=63044130 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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