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Long-Term Debt Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2011
Debt Disclosure [Abstract]  
Long-term debt
Long-term debt consists of the following (in thousands):
 
December 31,
 
2011
 
2010
Unsecured notes
$
250,000

 
$
—

Unamortized issuance costs
(2,139
)
 
—

 
$
247,861

 
$
—