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Investments in Real Estate and Real Estate Under Construction - Schedule of Acquired Properties (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) building | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | $ 727,581 | $ 310,128 |
Land and Land Estate | 31,930 | 29,085 |
Building and Improvements | 625,933 | 250,945 |
Lease in-place Value | 72,508 | 32,113 |
Below Market Lease | $ (2,790) | $ (2,015) |
Leases, Acquired-in-Place [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Weighted-average life of intangible assets (years) | 12 years 2 months | 16 years 7 months 6 days |
Leases, Acquired-in-Place, Market Adjustment [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Weighted-average life of intangible assets (years) | 14 years 11 months | 16 years 1 month 6 days |
Office Property [Member] | Lake Jackson, Texas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | $ 70,401 | $ 78,484 |
Land and Land Estate | 3,078 | 4,357 |
Building and Improvements | 67,323 | 74,127 |
Lease in-place Value | 0 | 0 |
Below Market Lease | $ 0 | 0 |
Number of buildings completed | building | 4 |  |
Redemption of noncontrolling interests | $ 7,951 |  |
Office Property [Member] | Charlotte, North Carolina [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 61,339 |  |
Land and Land Estate | 3,771 |  |
Building and Improvements | 47,064 |  |
Lease in-place Value | 10,504 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | New Century, Kansas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 12,056 |  |
Land and Land Estate | 0 |  |
Building and Improvements | 13,198 |  |
Lease in-place Value | 1,648 |  |
Below Market Lease | (2,790) |  |
Industrial Property [Member] | Lebanon, Indiana [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 36,194 |  |
Land and Land Estate | 2,100 |  |
Building and Improvements | 29,443 |  |
Lease in-place Value | 4,651 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Cleveland, Tennessee [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 34,400 |  |
Land and Land Estate | 1,871 |  |
Building and Improvements | 29,743 |  |
Lease in-place Value | 2,786 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Grand Prairie, Texas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 24,317 |  |
Land and Land Estate | 3,166 |  |
Building and Improvements | 17,985 |  |
Lease in-place Value | 3,166 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | San Antonio, Texas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 45,507 |  |
Land and Land Estate | 1,311 |  |
Building and Improvements | 36,644 |  |
Lease in-place Value | 7,552 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Opelika, Alabama [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 37,269 |  |
Land and Land Estate | 134 |  |
Building and Improvements | 33,183 |  |
Lease in-place Value | 3,952 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | McDonough, Georgia [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 66,700 |  |
Land and Land Estate | 5,441 |  |
Building and Improvements | 52,762 |  |
Lease in-place Value | 8,497 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Byhalia, Mississippi [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 36,590 |  |
Land and Land Estate | 1,751 |  |
Building and Improvements | 31,236 |  |
Lease in-place Value | 3,603 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Jackson, Tennessee [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 57,920 |  |
Land and Land Estate | 1,454 |  |
Building and Improvements | 49,026 |  |
Lease in-place Value | 7,440 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Smyrna, Tennessee [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 104,890 |  |
Land and Land Estate | 1,793 |  |
Building and Improvements | 93,940 |  |
Lease in-place Value | 9,157 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Lafayette, Indiana [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 17,450 |  |
Land and Land Estate | 662 |  |
Building and Improvements | 15,578 |  |
Lease in-place Value | 1,210 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Romulus, Michigan [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 38,893 |  |
Land and Land Estate | 2,438 |  |
Building and Improvements | 33,786 |  |
Lease in-place Value | 2,669 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Warren, Michigan [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 46,955 |  |
Land and Land Estate | 972 |  |
Building and Improvements | 42,521 |  |
Lease in-place Value | 3,462 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Winchester, Virginia [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 36,700 |  |
Land and Land Estate | 1,988 |  |
Building and Improvements | 32,501 |  |
Lease in-place Value | 2,211 |  |
Below Market Lease | 0 |  |
Industrial Property [Member] | Detroit, Michigan [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 29,697 |
Land and Land Estate |  | 1,133 |
Building and Improvements |  | 25,009 |
Lease in-place Value |  | 3,555 |
Below Market Lease |  | 0 |
Industrial Property [Member] | Anderson, South Carolina [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 61,347 |
Land and Land Estate |  | 4,663 |
Building and Improvements |  | 45,011 |
Lease in-place Value |  | 11,673 |
Below Market Lease |  | 0 |
Industrial Property [Member] | Wilsonville, Oregon [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 43,100 |
Land and Land Estate |  | 6,815 |
Building and Improvements |  | 32,380 |
Lease in-place Value |  | 5,920 |
Below Market Lease |  | (2,015) |
Industrial Property [Member] | Romeoville, Illinois [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 52,700 |
Land and Land Estate |  | 7,524 |
Building and Improvements |  | 40,167 |
Lease in-place Value |  | 5,009 |
Below Market Lease |  | 0 |
Industrial Property [Member] | Edwardsville, Illinois [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 44,800 |
Land and Land Estate |  | 4,593 |
Building and Improvements |  | 34,251 |
Lease in-place Value |  | 5,956 |
Below Market Lease |  | $ 0 |
LCIF [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 132,611 |  |
Land and Land Estate | 7,909 |  |
Building and Improvements | 107,570 |  |
Lease in-place Value | $ 17,132 |  |
Weighted-average life of intangible assets (years) | 15 years 11 months | 14 years 11 months |
Redemption of noncontrolling interests | $ 129,990 | $ 0 | $ 0
LCIF [Member] | Charlotte, North Carolina [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 61,339 |  |
Land and Land Estate | 3,771 |  |
Building and Improvements | 47,064 |  |
Lease in-place Value | 10,504 |  |
LCIF [Member] | Warren, Michigan [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 46,955 |  |
Land and Land Estate | 972 |  |
Building and Improvements | 42,521 |  |
Lease in-place Value | 3,462 |  |
LCIF [Member] | Romeoville, Illinois [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 52,700 |
Land and Land Estate |  | 7,524 |
Building and Improvements |  | 40,167 |
Lease in-place Value |  | $ 5,009 |
LCIF [Member] | Grand Prairie, TX [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 24,317 |  |
Land and Land Estate | 3,166 |  |
Building and Improvements | 17,985 |  |
Lease in-place Value | $ 3,166 |  |

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