Real Estate and Lending Activities - Development Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Development Activities [Member] | Twelve Oaks Facility [Member]
Significant Acquisitions and Disposals [Line Items]
Percentage of facility partially occupied	55.00%
Lease agreement	15 years
Rehabilitation Facility in South Ogden [Member] | Development Activities [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated total development cost	$ 19
Facility located in San Antonio, Texas [Member] | Development Activities [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated total development cost	5
Location Houston, TX [Member] | Development Activities [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated total development cost	$ 5
First Choice ER. [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities under construction	9