Subsequent Events - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 03, 2012
Loans, Net
Subsequent Event [Line Items]
New mortgage loan funded	$ 100
Master Lease Agreements | Prime Health Care Services
Subsequent Event [Line Items]
Master lease agreement, number of properties	10
Master lease agreements, total lease base	251
Master lease term	10 years
Master lease agreements, number of renewal options	2
Master lease, optional lease term	5 years
Master lease, generated annual cash rents	$ 26
Lease escalation percentage	100.00%