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Premises and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Premises and Equipment Disclosure [Text Block]
(5) Premises and Equipment

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



Depreciation expense of premises and equipment was $33 million, $32 million and $33 million for the years ended December 31, 2012, 2011 and 2010, respectively.