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Premises and Equipment Premises and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Premises and Equipment [Table Text Block]
Premises and equipment at December 31 are summarized as follows (in thousands):

 
 
December 31,
 
 
2012
 
2011
Land
 
$
73,616

 
$
73,638

Buildings and improvements
 
244,524

 
232,440

Software
 
89,183

 
82,801

Furniture and equipment
 
158,020

 
141,743

Subtotal
 
565,343

 
530,622

Less accumulated depreciation
 
299,423

 
267,887

Total
 
$
265,920

 
$
262,735