Note 3 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2014		2013
Restricted share units:
Pretax compensation expense	$	7,760	$	7,203
Tax benefit		2,957		2,755
Restricted share unit expense, net of tax	$	4,803	$	4,448
Performance share units:
Pretax compensation expense	$	2,115	$	1,571
Tax benefit		806		601
Performance share unit expense, net of tax	$	1,309	$	970
Stock options:
Pretax compensation expense	$	97	$	363
Tax benefit		37		139
Stock option expense, net of tax	$	60	$	224