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Investment Securities: (Tables)
9 Months Ended
Sep. 30, 2012
Investment Securities [Abstract]  
Available-for-sale Securities [Table Text Block]
The investment securities consist of the following at September 30, 2012 and December 31, 2011:

 
September 30, 2012
 
December 31, 2011
Federal tax-exempt debt securities
$
29,564

 
$
39,745

Corporate bonds
39,267

 
13,263

Sovereign bonds
647

 
1,928

Certificates of deposit
7,290

 
5,459

 
$
76,768

 
$
60,395