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Other Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Sep. 30, 2011
Other Liabilities    
Net accrued retirement benefits, less amounts recognized within accrued liabilities $ 62,127 $ 61,994
Uncertain tax positions, net of offsetting benefits (Note 16) 15,322 14,078
Other 11,512 12,622
Other liabilities, net $ 88,961 $ 88,694