Financing Activity (Timing of Principal Payments and Terms of Mortgage Loans) (Detail) (Consolidated Properties [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Consolidated Properties [Member]
Principal Amortization
2014	$ 20,923
2015	12,830
2016	12,411
2017	12,085
2018	12,450
2020 and thereafter	34,792
Total	105,491
Balloon Payments
2014	270,799	[1]
2015	219,480	[1]
2016	150,000	[1]
2017	28,050	[1]
2018	141,532	[1]
2020 and thereafter	492,595	[1]
Total	1,302,456	[1]
Total
2014	291,722
2015	232,310
2016	162,411
2017	153,617
2018	40,500
2020 and thereafter	527,387
Total	$ 1,407,947

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