Quarterly report pursuant to Section 13 or 15(d)

Real Estate Dispositions, Held for Sale and Impairment Charges - Components of Income from Real Estate and Related Assets Held for Sale (Detail)

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Real Estate Dispositions, Held for Sale and Impairment Charges - Components of Income from Real Estate and Related Assets Held for Sale (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Real Estate Properties [Line Items]        
Operating expense $ 13,433 $ 12,595 $ 26,688 $ 24,351
Real Estate Dispositions [Member]        
Real Estate Properties [Line Items]        
Operating revenue 1 106 45 215
Operating expense 50 50 103 105
Other expense 0 (25) (43) (49)
Total operating revenues (49) 31 (101) 61
Real Estate Held for Sale [Member]        
Real Estate Properties [Line Items]        
Operating revenue 119 212 242 424
Operating expense 29 65 57 131
Other expense (200) (33) (232) (65)
Total operating revenues $ (110) $ 114 $ (47) $ 228