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Note 20 - Incentive Plans - Performance Shares Activity (Details) - Performance Shares [Member] - shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Restricted stock outstanding as of January 1, (in shares) |  | 235,950 | 197,249 | 202,754
Granted (1) (in shares) | [1] | 297,450 | 135,780 | 100,170
Vested (in shares) | [2] | (100,170) | (97,079) | (105,675)
Restricted stock outstanding as of December 31, (in shares) |  | 433,230 | 235,950 | 197,249
[1] | The weighted-average grant date fair value for performance shares issued during the years ended December 31, 2018, 2017 and 2016 were $15.40, $23.35, and $28.60, respectively.
[2] | For the years ended December 31, 2018, 2017 and 2016, the corresponding common stock equivalent of these vested awards were 0, 0 and 130,080, respectively.

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Details
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