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Investment Securities: (Tables)
9 Months Ended
Sep. 30, 2013
Investment Securities [Abstract]  
Available-for-sale Securities [Table Text Block]

 
September 30, 2013
 
December 31, 2012
Federal tax-exempt debt securities
$
21,653

 
$
23,732

Corporate bonds
47,582

 
47,037

Certificates of deposit
3,580

 
8,490

 
$
72,815

 
$
79,259