Real Estate and Loans Receivable - Development Activities - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended	0 Months Ended
	Aug. 15, 2014	Dec. 31, 2014 RenewalOptions	Jul. 29, 2014
Significant Acquisitions and Disposals [Line Items]
Current development project		$ 160,367,000
Healthcare [Member]
Significant Acquisitions and Disposals [Line Items]
Term of lease, years	15 years
Number of lease extension options in current lease contract	4
Term of lease extension, years	5 years
Agreement amount related to acquisition	8,700,000
Development Activities [Member] | Oakleaf Surgical Hospital [Member] | Acute Care Hospital [Member] | Altoona, WI [Member] | National Surgical Hospitals [Member]
Significant Acquisitions and Disposals [Line Items]
Current development project		30,500,000
Term of lease, years		15 years
Number of lease extension options in current lease contract		2
Term of lease extension, years		5 years
Development Activities [Member] | Northern Utah Rehabilitation Hospital [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated total development cost		19,000,000
Development Activities [Member] | First Choice [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated total development cost		83,000,000
Number of facilities leased		17
Number of facilities under construction		1
Development Activities [Member] | First Choice [Member] | Minimum [Member]
Significant Acquisitions and Disposals [Line Items]
Percentage increase in consumer price index			2.00%
Development Activities [Member] | Adeptus Health [Member]
Significant Acquisitions and Disposals [Line Items]
Business acquisition, cost of acquired entity			150,000,000
Sale/leaseback transaction, initial term period			15 years
Sale/leaseback transaction, additional term period			5 years