Supplemental Cash Flow Information - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Supplemental Cash Flow Elements [Abstract]    
Distributions declared and unpaid $ (66,299) $ (26,514)
Reduction of debt through sale of certain real estate properties 0 974
Real estate properties acquired under 1031 exchange 20,784 0
Embedded conversion premium of convertible notes (56,740) 0
Reduction of debt, net of assets surrendered to lender 0 1,028
Accrued equity offering costs (250) 0
Accrued deferred financing costs $ (281) $ (9,814)