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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value Disclosures [Abstract]  
Fair value of certain financial assets and liabilities and other financial instruments
The fair value of certain financial assets and liabilities and other financial instruments as of December 31, 2011 and 2010, in thousands, are as follows:
 
December 31, 2011
 
December 31, 2010
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
Note receivable
$
54,788

 
$
55,000

 
$
57,951

 
$
40,500

Debt
$
1,042,933

 
$
1,060,830

 
$
780,880

 
$
794,900