Investments in Real Estate and Real Estate Under Construction - Schedule of Development Arrangements Outstanding (Details) ft² in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($) ft² building	Dec. 31, 2015 USD ($)
Investments in Real Estate and Real Estate Under Construction [Line Items]
Sq. Ft. \| ft²	641
Expected Maximum Commitment/Contribution	$ 177,892
Investments in real estate under construction	$ 106,652	$ 95,402
Joint Venture [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Co-venture equity ownership percentage	100.00%
Office Building [Member] \| Lake Jackson, Texas [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Sq. Ft. \| ft²	275
Expected Maximum Commitment/Contribution	$ 78,447
Lease Term (Years)	20 years
Investments in real estate under construction	$ 55,960
Number of buildings completed \| building	3
Number of buildings in progress \| building	4
Office Building [Member] \| Charlotte, North Carolina [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Sq. Ft. \| ft²	201
Expected Maximum Commitment/Contribution	$ 62,445
Lease Term (Years)	15 years
Investments in real estate under construction	$ 40,443
Industrial Property [Member] \| Opelika, Alabama [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Sq. Ft. \| ft²	165
Expected Maximum Commitment/Contribution	$ 37,000
Lease Term (Years)	25 years
Investments in real estate under construction	$ 10,249
LCIF [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Investments in real estate under construction	$ 40,443	$ 9,223
LCIF [Member] \| Office Building [Member] \| Charlotte, North Carolina [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Sq. Ft. \| ft²	201
Expected Maximum Commitment/Contribution	$ 62,445
Lease Term (Years)	15 years
Investments in real estate under construction	$ 40,443

Construction Commitment, Maximum Amount

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- Definition

Construction in Progress, Number of Buildings Completed

+ References

No definition available.

+ Details

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- Definition

Construction in Progress, Number of Buildings in Progress

+ References

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- Definition

Investments in Real Estate and Real Estate Under Construction [Line Items]

+ References

No definition available.

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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