Derivative Instruments and Hedging Activities (Details 2) - Instruments designated as accounting hedges: - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Derivative Instruments and Hedging Activities
Asset derivatives:	$ 22,290	$ 25,230
Liability derivatives:	21,787	23,279
Foreign currency forwards | Other current assets
Derivative Instruments and Hedging Activities
Asset derivatives:	18,966	11,321
Foreign currency forwards | Other noncurrent assets
Derivative Instruments and Hedging Activities
Asset derivatives:	3,324	13,909
Foreign currency forwards | Other current liabilities
Derivative Instruments and Hedging Activities
Liability derivatives:	18,432	9,370
Foreign currency forwards | Other noncurrent liabilities
Derivative Instruments and Hedging Activities
Liability derivatives:	$ 3,355	$ 13,909