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Subsequent Events - Additional Information (Detail) (USD $)
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0 Months Ended | 9 Months Ended | 0 Months Ended | 0 Months Ended | ||||||
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Jul. 07, 2014
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Jun. 11, 2014
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Sep. 30, 2014
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Sep. 30, 2013
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Jul. 25, 2014
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Oct. 16, 2014
Subsequent Event [Member]
Richmond, Virginia [Member]
Option
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Oct. 22, 2014
Subsequent Event [Member]
Canton, North Carolina [Member]
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Oct. 22, 2014
Subsequent Event [Member]
Canton, North Carolina [Member]
sqft
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Oct. 22, 2014
Subsequent Event [Member]
Canton, North Carolina [Member]
Previous Lease [Member]
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Oct. 27, 2014
Subsequent Event [Member]
South Hadley Massachusetts [Member]
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| Subsequent Event [Line Items] | ||||||||||
| Lease Term | 3 years | |||||||||
| Lease early termination option description | The tenant has an early termination option at any time after July 31, 2016. | |||||||||
| Lease description | The tenant is subject to a termination payment of 0.03 if they exercise this option. | |||||||||
| Termination payment | $ 30,000 | |||||||||
| Annualized straight line rent escalations | 200,000 | 1,400,000 | 600,000 | 300,000 | ||||||
| Number of options for renewal of lease | 1 | 2 | ||||||||
| Lease renewal period | 3 years | |||||||||
| Leasing commissions paid | 200,000 | 898,000 | 1,008,000 | 100,000 | ||||||
| Tenant improvements payable | 3,300,000 | 0 | ||||||||
| Finance for expansion project on property | $ 5,600,000 | $ 5,500,000 | ||||||||
| Area of additional real estate property | 150,000 | |||||||||
| Lease expiration period, month and year | 2016-11 | 2021-08 | 2024-07 | 2015-01 | ||||||
| Extended additional period of lease | 3 years | 10 years | 2 years | |||||||
| Extended lease expiration date | 2034-09 | 2017-01 | ||||||||
| Number of years under additional periods for lease renewal option | 1 year | |||||||||