Credit Facilities and Mortgage Notes Payable - Atlanta-Suwanee Land Loan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	0 Months Ended
Dec. 31, 2013	Dec. 31, 2013 Atlanta-Suwanee Land Loan [Member]	Dec. 31, 2011 Atlanta-Suwanee Land Loan [Member]
Debt Instrument [Line Items]
Loan agreement amount of loan			$ 1.60
Loan agreement interest rate	9.00%		10.00%
Loan agreement, maturity date	Dec. 31, 2013	Sep. 26, 2013

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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