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, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)
Investments in Real Estate and Real Estate Under Construction [Line Items]
Square Feet | ft²	2,190
Expected Maximum Commitment/Contribution	$ 298,621
Investments in real estate under construction	$ 95,402	$ 106,238
Industrial Property [Member] | Anderson, South Carolina [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Square Feet | ft²	1,325
Expected Maximum Commitment/Contribution	$ 70,012
Lease Term (Years)	20 years
Investments in real estate under construction	$ 23,826
Office Building [Member] | Lake Jackson, Texas [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Square Feet | ft²	664
Expected Maximum Commitment/Contribution	$ 166,164
Lease Term (Years)	20 years
Investments in real estate under construction	$ 62,353
Office Building [Member] | Charlotte, North Carolina [Member]
Investments in Real Estate and Real Estate Under Construction [Line Items]
Square Feet | ft²	201
Expected Maximum Commitment/Contribution	$ 62,445
Lease Term (Years)	15 years
Investments in real estate under construction	$ 9,223