Quarterly report pursuant to Section 13 or 15(d)

Real Estate Held for Sale and Impairment Charges - Additional Information (Detail)

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Real Estate Held for Sale and Impairment Charges - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 3 Months Ended 6 Months Ended
Jun. 06, 2014
Jun. 30, 2014
sqft
Mar. 31, 2014
Jun. 30, 2014
sqft
Real Estate [Abstract]        
Proceeds from sale of real estate $ 11,400     $ 11,162
Gain on sale of real estate 1,200 1,240   1,240
Impairment loss     $ 14,000 $ 13,958
Expiration period of property lease       2015-01
Extended period of lease on property       1 year
Area of industrial property   150,000   150,000