Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2014	Sep. 30, 2013
Estimated Fair Value [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities		$ 2,339
Derivative asset		1,813
Contingent Consideration	$ (3,758)	(21,774)
Net financial assets (liabilities)	(2,606)	(17,622)
Level 1 [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities		2,339
Derivative asset		0
Contingent Consideration	0	0
Net financial assets (liabilities)	0	2,339
Level 2 [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities		0
Derivative asset		1,813
Contingent Consideration	0	0
Net financial assets (liabilities)	1,152	1,813
Level 3 [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities		0
Derivative asset		0
Contingent Consideration	(3,758)	(21,774)
Net financial assets (liabilities)	(3,758)	$ (21,774)
Foreign currency forward [Member] | Estimated Fair Value [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	1,152
Foreign currency forward [Member] | Level 1 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Foreign currency forward [Member] | Level 2 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	1,152
Foreign currency forward [Member] | Level 3 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Convertible notes hedges [Member] | Estimated Fair Value [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	36,994
Convertible notes hedges [Member] | Level 1 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Convertible notes hedges [Member] | Level 2 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	36,994
Convertible notes hedges [Member] | Level 3 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Convertible notes embedded derivative [Member] | Estimated Fair Value [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative liability	(36,994)
Convertible notes embedded derivative [Member] | Level 1 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative liability	0
Convertible notes embedded derivative [Member] | Level 2 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative liability	(36,994)
Convertible notes embedded derivative [Member] | Level 3 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative liability	$ 0