Note 15 - Dividends and Dividend Equivalents (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Dividends Declared [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Dividend declared per share	$	0.60	$	0.50	$	1.80	$	1.50
Total amount	$	27,606	$	22,508	$	82,501	$	67,239