Variable Interest Entities - Condensed Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets:
Net Investment in Real Estate	$ 2,538,446	$ 2,502,638
Total Assets	2,728,198	2,709,808
Liabilities and Partners' Capital:
Mortgage Loans Payable, Net	502,838	561,241
Total Liabilities and Equity/Partners' Capital	2,728,198	2,709,808
Other Real Estate Partnerships
Assets:
Net Investment in Real Estate	295,516	306,866
Other Assets, Net	21,142	20,104
Total Assets	316,658	326,970
Liabilities and Partners' Capital:
Mortgage Loans Payable, Net	71,099	77,071
Other Liabilities, Net	42,836	43,103
Partners’ Capital	202,723	206,796
Total Liabilities and Equity/Partners' Capital	$ 316,658	$ 326,970