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Nature of Operations and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The components of accumulated other comprehensive income or loss are as follows (in thousands):
 
December 31,
 
2012
 
2011
Net unrealized appreciation on available-for-sale investments
$
4,455

 
$
4,681

Foreign currency translation
(6,469
)
 
(5,640
)
Accumulated other comprehensive loss
$
(2,014
)
 
$
(959
)