Activity in Real Estate Assets Held for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Property
Number of Properties  
Balance, December 31, 2013 11
Transfers from real estate investments 1
Sales (Note 11) (2)
Balance, March 31, 2014 (a) 10 [1]
Carrying Value  
Balance, December 31, 2013 $ 19,611
Transfers from real estate investments 8,611
Sales (Note 11) (3,135)
Balance, March 31, 2014 (a) $ 25,087 [1]
[1] Includes a single property with a net carrying amount of $8.6 million in which its operating results are reported in continuing operations.