Derivative Instruments and Hedging Activities (Details Textual) (USD $)	1 Months Ended	3 Months Ended
	Jul. 20, 2011	Sep. 30, 2011	Sep. 30, 2012	Jun. 30, 2012
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives			$ 675,000,000	$ 725,000,000
Maximum Length Of Time Hedged In Interest Rate Cash Flow Hedges			July 2016
Cash Flow Hedge Gain Loss Expected To Reclassified To Interest Expense In Next Twelve Month			2,300,000
Derivative Financial Instruments, Liabilities, Fair Value Disclosure			21,600,000	19,800,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)		11,900,000	1,800,000
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		100,000	400,000
Net Interest Rate Derivatives		7,200,000	1,100,000
Income Tax Included In Other Comprehensive Income		4,700,000	700,000
Assets Needed for Immediate Settlement, Aggregate Fair Value			25,200,000	23,300,000
Interest Rate Fair Value Hedge Derivative at Fair Value, Net			25,200,000
Foreign Currency Transaction Gain (Loss), before Tax	400,000	1,800,000
Gain (Loss) On Sale Of Derivatives	0	100,000
Minimum [Member]
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives			$ 475,000,000