Note 15 - Dividends and Dividend Equivalents (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Dividends Declared [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Dividend declared per share	$	0.50	$	0.40	$	1.00	$	0.80
Total amount	$	22,415	$	17,261	$	44,731	$	34,441