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Derivative Instruments and Hedging Activities (Details Textual 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2011 Interest Rate Swap Contracts [Member] Interest Expense [Member]	Sep. 30, 2012 Forward Starting Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reduction in interest expense	$ 1.5
Interest expense		$ 0.5

The amount of loss recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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