Note 15 - Dividends and Dividend Equivalents (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Dividends Declared [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Dividend declared per share	$	0.50	$	0.40	$	1.50	$	1.20
Total amount	$	22,508	$	17,341	$	67,239	$	51,782