Financing Activity (Timing of Principal Payments and Terms of Mortgage Loans) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Total
Mortgage loans payable	$ 1,222,859	$ 1,321,331
Consolidated Properties [Member]
Principal Amortization
2014	17,902
2015	18,652
2016	19,393
2017	19,791
2018	19,162
2022 and thereafter	32,871
Total	127,771
Balloon Payments
2014	150,000
2015	68,469
2016	0
2017	178,600
2018	27,161
2022 and thereafter	675,384
Total	1,099,614
Total
2014	167,902
2015	87,121
2016	19,393
2017	46,952
2018	197,762
2022 and thereafter	708,255
Total	1,227,385
Mortgage Loan [Member]
Total
Debt Issuance Costs, Net	$ 4,526	$ 4,200