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Note 6. Share-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2014
Disclosure Text Block [Abstract]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
 
Three Months Ended
September 30,

Nine Months Ended
September 30,
(Dollars in thousands)
2014
 
2013

2014
 
2013
Salaries, wages and employee benefits
$
3,375

 
$
5,505

 
$
14,351

 
$
16,699

Deferred income tax benefit
(1,317
)
 
(2,144
)
 
(5,597
)
 
(6,501
)
Net share-based compensation expense
$
2,058

 
$
3,361

 
$
8,754

 
$
10,198