Derivative Instruments and Hedging Activities - Accumulated Other Comprehensive Income (AOCI) and Earnings from Cash Flow Hedges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Unrealized gain (loss) recognized in AOCI	$ 7,147	$ (820)
Realized (loss) gain reclassified into earnings	$ (2,496)	$ 2,166

Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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