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Consolidated Statement Of Operations Parenthetical (Unaudited) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Operating expenses    
Selling, general and administrative (including charges from affiliates of $23.8 million and $22.9 million, respectively, for the three months, and $75.7 million and $77.0 million, respectively, for the nine months)$ 23,800,000$ 22,900,000$ 75,700,000$ 77,000,000