Note 20 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Aug. 05, 2021	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Treasury Stock, Shares, Acquired (in shares)			1,532,406
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)			$ 41.46
Treasury Stock, Value, Acquired, Cost Method		$ 63,529	$ 63,529	$ 12,880
Subsequent Event [Member]
Treasury Stock, Shares, Acquired (in shares)	300,075
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 38.23
Treasury Stock, Value, Acquired, Cost Method	$ 11,500