Aggregate Estimated Fair Value of Assets and Liabilities Acquired (Detail) (Series of Individually Immaterial Business Acquisitions, USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Series of Individually Immaterial Business Acquisitions
Assets acquired:
Investments in real estate	$ 213,703
Cash and cash equivalents	283
Restricted cash	1,436
Other assets	1,457
Deferred financing costs	702
Intangible assets	3,778
Total assets acquired	221,359
Liabilities assumed:
Loans payable on real estate	110,255
Accounts payable and accrued expenses	3,049
Other liabilities	2,481
Total liabilities assumed	115,785
Noncontrolling interests assumed:	3,000
Estimated fair value of net assets acquired	$ 102,574