Quarterly report pursuant to Section 13 or 15(d)

Commitment and Contingencies - Future Tenant Improvement Payments Due on Properties (Detail)

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Commitment and Contingencies - Future Tenant Improvement Payments Due on Properties (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Operating Leased Assets [Line Items]  
2014 $ 46,572
2015 55,853
2016 55,356
2017 53,551
2018 53,776
Tenant Improvements [Member]
 
Operating Leased Assets [Line Items]  
2014 3,635
2015   
2016   
2017   
2018   
2019   
Thereafter   
Tenant Improvements [Member] | Canton, NC [Member]
 
Operating Leased Assets [Line Items]  
Lease End Date 2024-07
2014 3,325
2015   
2016   
2017   
2018   
2019   
Thereafter   
Tenant Improvements [Member] | Concord Township, OH [Member]
 
Operating Leased Assets [Line Items]  
Lease End Date 2034-08
2014 150
2015   
2016   
2017   
2018   
2019   
Thereafter   
Tenant Improvements [Member] | Austin, TX [Member]
 
Operating Leased Assets [Line Items]  
Lease End Date 2015-06
2014 125
2015   
2016   
2017   
2018   
2019   
Thereafter   
Tenant Improvements [Member] | Hialeah, FL [Member]
 
Operating Leased Assets [Line Items]  
Lease End Date 2027-03
2014 35
2015   
2016   
2017   
2018   
2019   
Thereafter