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Investment Securities: (Tables)
3 Months Ended
Mar. 31, 2013
Investment Securities [Abstract]  
Available-for-sale Securities [Table Text Block]
The investment securities consist of the following at March 31, 2013 and December 31, 2012:

 
March 31, 2013
 
December 31, 2012
Federal tax-exempt debt securities
$
23,577

 
$
23,732

Corporate bonds
46,445

 
47,037

Sovereign bonds
647

 

Certificates of deposit
8,260

 
8,490

 
$
78,929

 
$
79,259