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Investment Securities: (Tables)
12 Months Ended
Dec. 31, 2011
Investment Securities [Abstract]  
Available-for-sale Securities [Table Text Block]
 
 
2011
 
2010
Federal tax-exempt debt securities
 
$
39,745

 
$
11,687

Corporate bonds
 
13,263

 

Sovereign bonds
 
1,928

 

Certificates of deposit
 
5,459

 
2,820

 
 
$
60,395

 
$
14,507

Investment Income [Table Text Block]
 
 
2011
 
2010
 
2009
Corporate dividends
 
$
15

 
$

 
$
169

Tax-exempt interest
 
103

 
58

 
721

Other interest
 
358

 
77

 
199

 
 
$
476

 
$
135

 
$
1,089