Medicare and Medicaid Electronic Health Records Incentives - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011 Hospital	Sep. 30, 2012
Postretirement Health Care Plans [Line Items]
Number of community hospitals			4
Incentive payments received	$ 8,521
Incentive payments deferred gain	8,521		8,521
Receivables on final settlement of cost reports		103		103
Amount of recognized incentive payments		$ 2,080