Financing Activity (Timing of Principal Payments and Terms of Mortgage Loans) (Detail) (Consolidated Properties [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Consolidated Properties [Member]
Principal Amortization
2014	$ 17,457
2015	22,198
2016	13,321
2017	12,401
2018	12,075
2019 and thereafter	47,477
Total	124,929
Balloon Payments
2014	51,000	[1]
2015	270,799	[1]
2016	243,745	[1]
2017	141,532	[1]
2018	150,000	[1]
2019 and thereafter	520,645	[1]
Total	1,377,721	[1]
Total
2014	68,457
2015	292,997
2016	257,066
2017	162,401
2018	153,607
2019 and thereafter	568,122
Total	$ 1,502,650

[1] The maturity date for the balloon payment due in 2014 may be extended pursuant to the terms of the applicable loan agreement.