Note 3 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Restricted share units:
Pretax compensation expense	$	5,812	$	4,467	$	20,243	$	18,764
Tax benefit		2,214		1,709		7,713		7,153
Restricted share unit expense, net of tax	$	3,598	$	2,758	$	12,530	$	11,611
Performance share units:
Pretax compensation expense	$	1,462	$	1,001	$	5,716	$	4,161
Tax benefit		557		383		2,178		1,586
Performance share unit expense, net of tax	$	905	$	618	$	3,538	$	2,575
Stock options:
Pretax compensation expense	$	33	$	156	$	163	$	677
Tax benefit		13		60		62		258
Stock option expense, net of tax	$	20	$	96	$	101	$	419