Note 3 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

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,
	2013		2012		2013		2012
Restricted share units:
Pretax compensation expense	$	4,467	$	4,628	$	18,764	$	18,272
Tax benefit		1,709		1,770		7,153		6,989
Restricted share unit expense, net of tax	$	2,758	$	2,858	$	11,611	$	11,283
Performance share units:
Pretax compensation expense	$	1,001	$	698	$	4,161	$	2,947
Tax benefit		383		267		1,586		1,127
Performance share unit expense, net of tax	$	618	$	431	$	2,575	$	1,820
Stock options:
Pretax compensation expense	$	156	$	264	$	677	$	760
Tax benefit		60		101		258		291
Stock option expense, net of tax	$	96	$	163	$	419	$	469