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Other Assets And Deferred Charges (Schedule Of Other Assets And Deferred Charges) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Other Assets And Deferred Charges [Abstract]    
Interest rate swap deposits $ 36,041 $ 23,175
Innospec Inc. settlement receivable 10,030 0
Deferred financing costs, net of amortization 6,795 6,165
Asbestos insurance receivables 6,345 8,489
Foundry Park I deferred leasing costs 4,597 4,997
Other 9,811 6,067
Other assets and deferred charges $ 73,619 $ 48,893