Real Estate Investments (Details)	9 Months Ended
	Sep. 30, 2018
Urbandale, IA [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q1 2018
Status	Completed
Bernalillo, NM [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q1 2018
Status	Completed
North Ridgeville, OH [Member]
Lease Structure	Build-to-Suit	[1]
Lease Term	20 years	[1]
Actual or Anticipated Rent Commencement	Q1 2018	[1]
Status	Completed	[1]
Canton, MI [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q1 2018
Status	Completed
Grand Rapids, MI [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q2 2018
Status	Completed
Chickasha, OK [Member]
Lease Structure	Build-to-Suit
Lease Term	10 years
Actual or Anticipated Rent Commencement	Q3 2018
Status	Completed
Aurora, IL [Member]
Lease Structure	Build-to-Suit	[1]
Lease Term	20 years	[1]
Actual or Anticipated Rent Commencement	Q3 2018	[1]
Status	Completed	[1]
Nampa, ID [Member]
Lease Structure	Build-to-Suit
Lease Term	15 years
Actual or Anticipated Rent Commencement	Q3 2018
Status	Completed
Orlando, FL [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q4 2018
Status	Under Construction
Tavares, FL [Member]
Lease Structure	Build-to-Suit
Lease Term	20 years
Actual or Anticipated Rent Commencement	Q4 2018
Status	Under Construction
Batavia, OH [Member]
Lease Structure	Build-to-Suit
Lease Term	10 years
Actual or Anticipated Rent Commencement	Q1 2019
Status	Under Construction
Maumee, OH [Member]
Lease Structure	Build-to-Suit
Lease Term	10 years
Actual or Anticipated Rent Commencement	Q1 2019
Status	Under Construction
Mt. Pleasant, MI [Member]
Lease Structure	Build-to-Suit
Lease Term	15 years
Actual or Anticipated Rent Commencement	Q4 2019
Status	Under Construction

[1] Franchise restaurant operated by TOMS King, LLC.