Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended																			1 Months Ended	0 Months Ended
	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign currency forward [Member] Interest expense, net/Other (income) expense [Member]	Jun. 30, 2013 Designated as Hedging Instrument [Member] Foreign currency forward [Member] Interest expense, net/Other (income) expense [Member]	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign currency forward [Member] Interest expense, net/Other (income) expense [Member]	Jun. 30, 2013 Designated as Hedging Instrument [Member] Foreign currency forward [Member] Interest expense, net/Other (income) expense [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Convertible Notes Derivatives [Member]	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Convertible Notes Derivatives [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Convertible Notes Derivatives [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member] Other (income) expense [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member] Other (income) expense [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member] Other (income) expense [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign currency forward [Member] Other (income) expense [Member]	Jun. 30, 2014 Other assets, net [Member] Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Sep. 30, 2013 Other assets, net [Member] Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Other assets, net [Member] Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2014 Other assets, net [Member] Not Designated as Hedging Instrument [Member] Convertible notes hedges [Member]	Sep. 30, 2013 Other assets, net [Member] Not Designated as Hedging Instrument [Member] Convertible notes hedges [Member]	Jun. 30, 2013 Other assets, net [Member] Not Designated as Hedging Instrument [Member] Convertible notes hedges [Member]	Jun. 30, 2014 Long-term debt, less current maturities [Member] Convertible notes embedded derivative [Member]	Jun. 30, 2014 Long-term debt, less current maturities [Member] Not Designated as Hedging Instrument [Member] Convertible notes embedded derivative [Member]	Sep. 30, 2013 Long-term debt, less current maturities [Member] Not Designated as Hedging Instrument [Member] Convertible notes embedded derivative [Member]	Jun. 30, 2013 Long-term debt, less current maturities [Member] Not Designated as Hedging Instrument [Member] Convertible notes embedded derivative [Member]	Jun. 30, 2014 Prepaid expenses and other assets [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Sep. 30, 2013 Prepaid expenses and other assets [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Prepaid expenses and other assets [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2014 Other current liabilities [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Sep. 30, 2013 Other current liabilities [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	Jun. 30, 2013 Other current liabilities [Member] Not Designated as Hedging Instrument [Member] Foreign currency forward [Member]	May 15, 2013 9% unsecured notes due 2015 [Member] Grupo Finmart [Member]	Jun. 30, 2014 2.125% cash convertible senior notes due 2019 [Member]	Jul. 02, 2014 Subsequent Event [Member] 2.125% cash convertible senior notes due 2019 [Member]
Derivative [Line Items]
Cross-border debt offering																																			$ 30,000,000
Convertible senior notes issued and settled																																				200,000,000.0	30,000,000
Option to purchase additional principal																																				30,000,000
Fair value, asset of derivative instruments																			1,496,000	1,813,000	2,395,000	46,454,000	0	0					667,000	0	0
Fair value, (liabilities) of derivative instruments																									(46,500,000)	(46,454,000)	0	0				(378,000)	0	0
Fair value, net asset (liability) of derivative instruments									0	0	0	289,000	0	0
Amount of loss (gain) recognized in Other Comprehensive Income on derivatives (effective portion)	497,000	(2,388,000)	1,169,000	(2,388,000)
Amount of loss (gain) on derivatives reclassified into income from Accumulated Other Comprehensive Income (effective portion)					272,000	(1,888,000)	814,000	(1,888,000)
Amount of unrealized gain on derivatives															$ 289,000	$ 0	$ 289,000	$ 0