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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2012
Schedule of Investments [Abstract]  
Fair Value, by Balance Sheet Grouping
he following table presents the supplemental fair value information about long-term debt at September 30, 2012 and December 31, 2011 (amounts in thousands):
 
September 30, 2012
 
December 31, 2011
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
Total debt
$
499,374

 
$
561,197

 
$
419,600

 
$
443,309