Other Liabilities - Schedule of Unpaid Claims Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims liability at beginning of year	$ 11,313
Unpaid claims liability at the end of the year	10,134	$ 11,313
Tenant Reinsurance Claims [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims liability at beginning of year	3,908	3,121	$ 2,112
Claims and claim adjustment expense for claims incurred in the current year	7,250	6,421	5,126
Claims and claim adjustment expense for claims incurred in the prior years	(87)	0	345
Payments for current year claims	(5,423)	(4,283)	(2,954)
Payments for prior year claims	(1,926)	(1,351)	(818)
Unpaid claims liability at the end of the year	$ 3,896	$ 3,908	$ 3,121