Note 13 - Equity (Details Textual) - USD ($) $ in Thousands, shares in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 08, 2021	Jan. 25, 2021	Mar. 26, 2020	Feb. 10, 2020
Stock Repurchase Program, Authorized Amount							$ 40,000		$ 20,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 31,600		$ 2,500
Treasury Stock, Shares, Acquired (in shares)				0.5	1.4
Treasury Stock, Value, Acquired, Cost Method	$ 249	$ 8,118	$ 17,515	$ 8,400	$ 17,500