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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Investments [Abstract]  
Fair Value, by Balance Sheet Grouping
The following table presents the supplemental fair value information about long-term debt at December 31, 2012 and 2011 (amounts in thousands):
 
December 31, 2012
 
December 31, 2011
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
Total debt
$
519,597

 
$
565,257

 
$
419,600

 
$
443,309