Debt - Master Trust Notes - Narrative (Details) - Master Trust Notes - Series 2013-2, Class A
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Property
debt_series
Dec. 31, 2018
USD ($)
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]      
Number of debt series outstanding | debt_series 1    
Stated interest rate 5.27%    
Weighted average effective interest rate 5.89%    
Number of properties securing borrowings | Property 269    
Maturity 4 years 8 months    
Deferred financing costs | $ $ 4.0 $ 4.2 $ 8.0