Note 3 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended March 31,
	2022		2021
Restricted share units:
Pretax compensation expense	$	12,975	$	10,778
Tax benefit		3,250		2,727
Restricted share unit expense, net of tax	$	9,725	$	8,051
Performance share units:
Pretax compensation expense	$	6,166	$	4,189
Tax benefit		1,545		1,060
Performance share unit expense, net of tax	$	4,621	$	3,129