Note 3 - Share-based Compensation

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

3 . Share-b ased Compensation

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

	Three Months Ended March 31,
	2019		2018
Restricted share units:
Pretax compensation expense	$	9,741	$	8,591
Tax benefit		2,435		2,234
Restricted share unit expense, net of tax	$	7,306	$	6,357
Performance share units:
Pretax compensation expense	$	3,830	$	3,445
Tax benefit		957		896
Performance share unit expense, net of tax	$	2,873	$	2,549

As of

March 31, 2019,

we had

$88.1

million and

$23.8

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

3.3

years for restricted share units and

2.3

years for performance share units. During the

first

quarter

2019,

we issued

170

shares for vested restricted share units and

51,441

shares for vested performance share units.