Derivative Instruments and Hedging Activities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Derivative Instruments and Hedging Activities
Asset derivatives:	$ 14,454	$ 25,230
Liability derivatives:	13,920	23,279
Foreign currency forwards | Other current assets
Derivative Instruments and Hedging Activities
Asset derivatives:	13,613	11,321
Foreign currency forwards | Other noncurrent assets
Derivative Instruments and Hedging Activities
Asset derivatives:	841	13,909
Foreign currency forwards | Other current liabilities
Derivative Instruments and Hedging Activities
Liability derivatives:	13,002	9,370
Foreign currency forwards | Other noncurrent liabilities
Derivative Instruments and Hedging Activities
Liability derivatives:	$ 918	$ 13,909