Note 15 - Dividends and Dividend Equivalents (Details) - Cash Dividends - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Cash Dividends [Abstract]
Dividend Declared per Share	$ 0.20	$ 0.20	$ 0.20
Total Amount	$ 7,901	$ 7,925	$ 7,854