Note 15 - Dividends and Dividend Equivalents (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Dividends Declared [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Dividend declared per share	$	0.60	$	0.50	$	1.20	$	1.00
Total amount	$	27,501	$	22,415	$	54,894	$	44,731