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Commitments And Contingencies
3 Months Ended
Mar. 31, 2012
Commitments And Contingencies [abstract]  
Commitments And Contingencies
COMMITMENTS AND CONTINGENCIES
Guarantees of Indebtedness
The payments of principal and interest on our senior notes and convertible senior notes are guaranteed by certain of our subsidiaries. The par value of the senior notes and convertible senior notes was $500.5 million as of March 31, 2012 and December 31, 2011, respectively. See guarantor consolidating financial statements in Note 14.