Real Estate Investments (Narrative) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
real_estate_investment
property
Real Estate Properties [Line Items]  
Number of real estate investments purchased | real_estate_investment 9
Number of real estate properties purchased | property 15
Acquisition fees and expenses capitalized | $ $ 6,011
Maximum [Member]  
Real Estate Properties [Line Items]  
Acquisition fee and expense reimbursement, as percentage of purchase price of properties 6.00%