Quarterly report pursuant to Section 13 or 15(d)

LONG-LIVED ASSETS, Investments in Nonconsolidated Affiliates (Details)

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LONG-LIVED ASSETS, Investments in Nonconsolidated Affiliates (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Schedule of Equity Method Investments [Line Items]    
Ownership interest in nonconsolidated affiliate (in hundredths)   33.00%
Significant Nonconsolidated Affiliate [Member]
   
Schedule of Equity Method Investments [Line Items]    
Ownership interest in nonconsolidated affiliate (in hundredths) 33.00%  
Investments in nonconsolidated affiliates [Abstract]    
Revenue (at 100 percent) $ 34,217 $ 27,668
Operating income (at 100 percent) 19,515 16,049
Net income (at 100 percent) $ 14,075 $ 10,580