XML 36 R52.htm IDEA: XBRL DOCUMENT v2.3.0.15
Financial Instruments (Carrying And Estimated Fair Values Of Financial Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2011
Dec. 31, 2010
Sep. 30, 2010
Dec. 31, 2009
Cash and cash equivalents, Carrying Amount$ 40,117$ 196,556$ 172,820$ 260,727
Cash and cash equivalents, Fair Value40,117196,556  
Receivables credit facility, Carrying Amount(109,000)(109,000)  
Receivables credit facility, Fair Value(109,000)(109,000)  
Capital lease obligations, Carrying Amount(22,004)(22,502)  
Capital lease obligations, Fair Value(22,004)(22,502)  
5.75% Senior Notes [Member]
    
Long-term debt, Carrying Amount(399,400)(399,143)  
Long-term debt, Fair Value(424,304)(430,464)  
Senior notes, stated percentage5.75%5.75%  
6.50% Senior Notes [Member]
    
Long-term debt, Carrying Amount(149,960)(149,956)  
Long-term debt, Fair Value$ (165,717)$ (158,800)  
Senior notes, stated percentage6.50%6.50%