Real Estate and Loans Receivable - Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Acquisitions and Disposals [Line Items]
Intangible lease assets	$ 90,490,000	$ 51,966,000
Intangible Assets [Member]
Significant Acquisitions and Disposals [Line Items]
Intangible lease assets	90,500,000	52,000,000
Accumulated amortization, net	75,000,000	40,100,000
Amortization expense related to intangible lease assets	$ 4,000,000	$ 3,900,000	$ 5,200,000
Capitalized lease intangibles, weighted average life (in years)	18 years 7 months 6 days