Assets at Fair Value on Nonrecurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Fair Value, Measurements, Nonrecurring
Dec. 31, 2013
Fair Value, Measurements, Nonrecurring
Mar. 31, 2014
Fair Value, Measurements, Nonrecurring
Fair Value
Dec. 31, 2013
Fair Value, Measurements, Nonrecurring
Fair Value
Mar. 31, 2014
Fair Value, Measurements, Nonrecurring
Level 1
Dec. 31, 2013
Fair Value, Measurements, Nonrecurring
Level 1
Mar. 31, 2014
Fair Value, Measurements, Nonrecurring
Level 2
Dec. 31, 2013
Fair Value, Measurements, Nonrecurring
Level 2
Mar. 31, 2014
Fair Value, Measurements, Nonrecurring
Level 3
Dec. 31, 2013
Fair Value, Measurements, Nonrecurring
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Long-lived assets held and used, Fair Value         $ 7,488   $ 0   $ 0   $ 7,488  
Lease intangible assets, Fair Value         0 0 0 0 0 0 0 0
Long-lived assets held for sale, Fair Value         8,611 11,198 0 0 0 0 8,611 38,030
Long-lived assets held and used, Disposition     0                  
Lease intangible assets, Disposition     0 0                
Long-lived assets held for sale, Disposition     0 (26,832)                
Long-lived assets held and used, Impairment Charges     (795) [1]                  
Lease intangible assets, Impairment Charges     (70) [1] (182) [1]                
Long-lived assets held for sale, Impairment Charges     (842) [1] (7,134) [1]                
Total Impairment Charges $ (1,707) $ (2,103) $ (1,707) [1] $ (7,316) [1]                
[1] Impairment charges are presented for the three months ended March 31, 2014 and for the year ended December 31, 2013.