Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References+ Details

- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References+ Details

- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References+ Details

Derivative Financial Instruments (Details 2) (USD $)			6 Months Ended	3 Months Ended	6 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended						3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended
Derivative Financial Instruments (Details 2) (USD $)	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2013 Interest rate swap agreements Cash flow hedges	Mar. 31, 2013 Derivatives designated as hedging instruments Foreign currency options Cash flow hedges	Mar. 31, 2013 Derivatives designated as hedging instruments Foreign currency options Cash flow hedges	Sep. 30, 2012 Derivatives designated as hedging instruments Foreign currency options Prepaid expenses and other current assets	Mar. 31, 2013 Derivatives designated as hedging instruments Foreign currency forward contracts Cash flow hedges	Mar. 31, 2013 Derivatives designated as hedging instruments Interest rate swap agreements Cash flow hedges	Mar. 31, 2012 Derivatives designated as hedging instruments Interest rate swap agreements Cash flow hedges	Mar. 31, 2013 Derivatives designated as hedging instruments Interest rate swap agreements Cash flow hedges	Mar. 31, 2012 Derivatives designated as hedging instruments Interest rate swap agreements Cash flow hedges	Mar. 31, 2013 Derivatives designated as hedging instruments Interest rate swap agreements Accrued expenses and other current liabilities	Sep. 30, 2012 Derivatives designated as hedging instruments Interest rate swap agreements Accrued expenses and other current liabilities	Mar. 31, 2013 Derivatives designated as hedging instruments Interest rate swap agreements Other long-term liabilities	Sep. 30, 2012 Derivatives designated as hedging instruments Interest rate swap agreements Other long-term liabilities	Mar. 31, 2013 Derivatives not designated as hedging instruments	Mar. 31, 2012 Derivatives not designated as hedging instruments	Mar. 31, 2013 Derivatives not designated as hedging instruments	Mar. 31, 2012 Derivatives not designated as hedging instruments	Mar. 31, 2013 Derivatives not designated as hedging instruments Option contracts Other income (expense)	Mar. 31, 2013 Derivatives not designated as hedging instruments Option contracts Other income (expense)	Mar. 31, 2013 Derivatives not designated as hedging instruments Option contracts Prepaid expenses and other current assets	Sep. 30, 2012 Derivatives not designated as hedging instruments Option contracts Prepaid expenses and other current assets	Mar. 31, 2013 Derivatives not designated as hedging instruments Foreign currency forward contracts General and administrative expenses	Mar. 31, 2012 Derivatives not designated as hedging instruments Foreign currency forward contracts General and administrative expenses	Mar. 31, 2013 Derivatives not designated as hedging instruments Foreign currency forward contracts General and administrative expenses	Mar. 31, 2012 Derivatives not designated as hedging instruments Foreign currency forward contracts General and administrative expenses	Mar. 31, 2013 Derivatives not designated as hedging instruments Foreign currency forward contracts Prepaid expenses and other current assets	Sep. 30, 2012 Derivatives not designated as hedging instruments Foreign currency forward contracts Prepaid expenses and other current assets	Mar. 31, 2013 Derivatives not designated as hedging instruments Foreign currency forward contracts Accrued expenses and other current liabilities	Sep. 30, 2012 Derivatives not designated as hedging instruments Foreign currency forward contracts Accrued expenses and other current liabilities
Fair values of outstanding derivative instruments
Derivative assets	$ 1,400,000	$ 600,000				$ 100,000																$ 100,000	$ 100,000					$ 1,300,000	$ 400,000
Derivative liabilities	6,700,000	6,700,000										2,700,000	2,900,000	2,000,000	3,200,000															2,000,000	600,000
Effect of derivative instruments on income and other comprehensive income
Increase in Losses Recognized in Accumulated Other Comprehensive Loss on Derivatives Before Tax Effect (Effective Portion)			4,700,000						(2,100,000)		(2,900,000)
Losses Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)				0				(800,000)	(500,000)	(1,500,000)	(900,000)
Losses Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing and Ineffective Portion)					100,000		0	0
Non designated derivatives, Gains/(Losses) Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing and Ineffective Portion)																$ 800,000	$ 1,200,000	$ (300,000)	$ 2,700,000	$ (300,000)	$ (400,000)			$ 1,100,000	$ 1,200,000	$ 100,000	$ 2,700,000