Note 15 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.09
Dividends, Common Stock, Cash	$ 4,852
Dividends Payable, Date Declared	Mar. 09, 2020
Dividends Payable, Date to be Paid	Jun. 18, 2020
Dividends Payable, Date of Record	Apr. 20, 2020

Aggregate dividends declared during the period for each share of common stock outstanding.

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 1
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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