Fair Value Measurements (Details) (USD $)	3 Months Ended	9 Months Ended														1 Months Ended	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2013 Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2013 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2013 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Sep. 30, 2013 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Apr. 30, 2013 Grupo Finmart [Member]	Jun. 30, 2014 Grupo Finmart [Member]	Jun. 30, 2014 Foreign currency forward [Member] Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Foreign currency forward [Member] Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Foreign currency forward [Member] Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Foreign currency forward [Member] Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Foreign currency forward [Member] Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Foreign currency forward [Member] Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Foreign currency forward [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2013 Foreign currency forward [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes hedges [Member] Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes hedges [Member] Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes hedges [Member] Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes hedges [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes embedded derivative [Member] Estimated Fair Value [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes embedded derivative [Member] Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes embedded derivative [Member] Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jun. 30, 2014 Convertible notes embedded derivative [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]
Financial assets that are measured at fair value on a recurring basis
Marketable equity securities				$ 2,641,000	$ 2,339,000	$ 2,910,000	$ 2,641,000	$ 2,339,000	$ 2,910,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Derivative assets					1,813,000			0			1,813,000			0				2,163,000	2,395,000	0	0	2,163,000	2,395,000	0	0	46,454,000	0	46,454,000	0
Derivative liability																		(378,000)				(378,000)								(46,454,000)	0	(46,454,000)	0
Contingent consideration	(6,900,000)	(6,900,000)	(18,100,000)	(6,893,000)	(18,197,000)	(18,078,000)	0	0	0	0	0	0	(6,893,000)	(18,197,000)	(18,078,000)
Net financial assets (liabilities)				(2,467,000)	(14,045,000)	(12,773,000)	2,641,000	2,339,000	2,910,000	1,785,000	1,813,000	2,395,000	(6,893,000)	(18,197,000)	(18,078,000)
Accretion expense		100,000	400,000
Cash payment of contingent consideration																12,800,000
Foreign exchange loss on earn out payments																	1,000,000
Earn out payment																	12,100,000
Change in contingent consideration liability	(300,000)
Contingent consideration liability	6,900,000	6,900,000	18,100,000	6,893,000	18,197,000	18,078,000	0	0	0	0	0	0	6,893,000	18,197,000	18,078,000
Additional contingent consideration			$ 7,100,000