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Other Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Sep. 30, 2015
Net accrued retirement benefits, less amounts recognized within accrued liabilities $ 54,224 $ 55,259
Noncurrent portion of deferred income from JV formation 241,929 0
Total unrecognized tax benefits, net of offsetting adjustments 15,234 15,394
Acquired unfavorable contracts 3,553 4,656
Deferred economic incentives 18,424 19,163
Other 11,973 19,254
Other liabilities 353,269 116,190
Loss Reserve On Contractual Lease Commitments [Member]    
Loss reserve $ 7,932 $ 2,464