Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended		1 Months Ended	0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Jul. 02, 2014	Jun. 30, 2014	Sep. 30, 2014	Jun. 30, 2013	May 15, 2013
Derivative [Line Items]
Proceeds from settlement of forward currency contracts	$ 2,313,000	$ 0
Designated as Hedging Instrument [Member] | Foreign currency forward [Member]
Derivative [Line Items]
Amount of loss recognized in Other Comprehensive Income on derivatives (effective portion)	0	346,000
Designated as Hedging Instrument [Member] | Foreign currency forward [Member] | Other expense [Member]
Derivative [Line Items]
Amount of loss on derivatives reclassified into income from Accumulated Other Comprehensive Income (effective portion)	352,000	245,000
Not Designated as Hedging Instrument [Member] | Foreign currency forward [Member] | Other income [Member]
Derivative [Line Items]
Amount of unrealized gain on derivatives	701,000	0
Other assets, net [Member] | Not Designated as Hedging Instrument [Member] | Convertible notes hedges [Member]
Derivative [Line Items]
Fair value, asset of derivative instruments	45,163,000	0	45,163,000			36,994,000
Long-term debt, less current maturities [Member] | Convertible notes embedded derivative [Member]
Derivative [Line Items]
Fair value, (liabilities) of derivative instruments					(46,500,000)
Long-term debt, less current maturities [Member] | Not Designated as Hedging Instrument [Member] | Convertible notes embedded derivative [Member]
Derivative [Line Items]
Fair value, (liabilities) of derivative instruments	(45,163,000)	0	(45,163,000)			(36,994,000)
Receivables, prepaid expenses and other current assets [Member] | Designated as Hedging Instrument [Member] | Foreign currency forward [Member]
Derivative [Line Items]
Fair value, asset of derivative instruments	2,173,000	1,952,000	2,173,000			2,420,000
Receivables, prepaid expenses and other current assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign currency forward [Member]
Derivative [Line Items]
Fair value, asset of derivative instruments	7,814,000	0	7,814,000			1,152,000
Other current liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign currency forward [Member]
Derivative [Line Items]
Fair value, (liabilities) of derivative instruments	(4,653,000)	0	(4,653,000)			1,308,000
9% unsecured notes due 2015 [Member] | Grupo Finmart [Member]
Derivative [Line Items]
Cross-border debt offering							30,000,000	30,000,000.0
Repayments of long-term debt			17,500,000
2.125% cash convertible senior notes due 2019 [Member]
Derivative [Line Items]
Convertible senior notes issued and settled				30,000,000.0	200,000,000.0
Option to purchase additional principal					$ 30,000,000.0