Note 20 - Stock Repurchase Program (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		8 Months Ended	9 Months Ended		17 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Dec. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	May 07, 2019
Treasury Stock, Value, Acquired, Cost Method		$ 4,692		$ 12,880	$ 36,301
May 2019 Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount							$ 50,000
Treasury Stock, Shares, Acquired (in shares)	400,000		741,934			1,141,934
Treasury Stock, Value, Acquired, Cost Method	$ 12,900		$ 26,400			$ 39,300
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 32.20		$ 35.59			$ 34.40