Real Estate and Loans Receivable - Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Intangible lease assets	$ 256,950	$ 108,885
Intangible Assets [Member]
Debt Instrument [Line Items]
Intangible lease assets	257,000	108,900
Accumulated amortization, net	231,700	87,700
Amortization expense related to intangible lease assets	$ 9,100	$ 7,000	$ 4,000
Capitalized lease intangibles, weighted average life (in years)	24 years