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Note 18 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Stockholders' Equity Attributable to Parent, Ending Balance | $ 2,064,833 |  | $ 2,064,833 |  | $ 1,973,304
Stockholders' Equity, Period Increase (Decrease), Total |  |  | 91,500 |  |
Net Income (Loss) Attributable to Parent, Total | 73,664 | $ 51,415 | 137,480 | $ 100,356 |
Dividends, Common Stock, Cash |  |  | 39,000 |  |
Other Comprehensive Income (Loss), Net of Tax, Total | $ (2,015) | $ 2,222 | $ (11,336) | $ 2,295 |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 578,238 |  | 578,238 |  | 943,327
U.S. Treasury [Member] |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 1,846,374 |  | 1,846,374 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 20.96 |  | $ 20.96 |  | $ 20.41
Class of Warrant or Right, Increase in Warrants Exercisable, Percentage |  |  |  |  | 1.03%

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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