Other Liabilities - Schedule of Unpaid Claims Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims liability at beginning of year	$ 1,832
Unpaid claims liability at the end of the year	11,313	$ 1,832
Tenant Reinsurance Claims [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims liability at beginning of year	3,121	2,112	$ 1,414
Claims and claim adjustment expense for claims incurred in the current year	6,421	5,126	3,817
Claims and claim adjustment expense for claims incurred in the prior years	0	(345)	(116)
Payments for current year claims	(4,283)	(2,954)	(1,751)
Payments for prior year claims	(1,351)	(818)	(1,252)
Unpaid claims liability at the end of the year	$ 3,908	$ 3,121	$ 2,112