Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	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	(2,025)	(18,197)
Net financial assets (liabilities)	2,855	(14,045)
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)	4,880	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	(2,025)	(18,197)
Net financial assets (liabilities)	(2,025)	(18,197)
Foreign currency forward [Member] | Estimated Fair Value [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	3,572
Derivative liability	1,308
Foreign currency forward [Member] | Level 1 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Derivative liability	0
Foreign currency forward [Member] | Level 2 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	3,572
Derivative liability	1,308
Foreign currency forward [Member] | Level 3 [Member]
Financial assets that are measured at fair value on a recurring basis
Derivative asset	0
Derivative liability	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