Note 8 - Subsequent Event (Details Textual) - Subsequent Event [Member] $ / shares in Units, $ in Millions	Nov. 18, 2016 USD ($) $ / shares
Dividends Payable, Date Declared	Nov. 18, 2016
Dividends Payable, Amount Per Share \| $ / shares	$ 1.50
Dividends Payable, Date of Record	Nov. 28, 2016
Dividends Payable \| $	$ 70
Dividends Payable, Date to be Paid	Jan. 27, 2017

Date the declared dividend will be paid, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Topic 942
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-Section S99
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-Subparagraph (SX 210.9-03(15)(5))
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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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