Note 3 - Share-based Compensation

3 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

3.         Share-based Compensation

The following table summarizes the components of our share-based compensation program expense (in thousands):

	Three Months Ended March 31,
	2021		2020
Restricted share units:
Pretax compensation expense	$	10,778	$	14,679
Tax benefit		2,727		3,758
Restricted share unit expense, net of tax	$	8,051	$	10,921
Performance share units:
Pretax compensation expense	$	4,189	$	3,384
Tax benefit		1,060		866
Performance share unit expense, net of tax	$	3,129	$	2,518

         As of March 31, 2021, we had $95.3 million and $32.3 million of total unrecognized compensation expense related to restricted share units and performance share units, respectively, that is to be recognized over the remaining weighted-average period of approximately 3.1 years for restricted share units and 2.7 years for performance share units. During the first quarter 2021, we issued 10,128 shares for vested restricted share units and 76,948 shares for vested performance share units.