Note 3 - Share-based Compensation

3 Months Ended

Mar. 31, 2017

Notes to Financial Statements

Disclosure of Compensation Related Costs, Share-based Payments [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,
	2017		2016
Restricted share units:
Pretax compensation expense	$	8,136	$	7,968
Tax benefit		2,278		3,028
Restricted share unit expense, net of tax	$	5,858	$	4,940
Performance share units:
Pretax compensation expense	$	3,034	$	3,004
Tax benefit		849		1,142
Performance share unit expense, net of tax	$	2,185	$	1,862

As of

March

31,

2017,

we had

$61.7

million and

$16.3

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

3.6

years for restricted share units and

2.4

years for performance share units. During the

first

quarter

2017,

we issued

9,109

shares for vested restricted share units.