Summary of Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of Medical Office Disposed	5
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment Charge of Contractual Sale Price	$ 0.2