Related Party Transactions - Notes Receivable (Details) - Affiliated Entity - Master Trust 2014 Series 2017-1 $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
USD ($)
| |
| Related Party Transaction [Line Items] | |
| Percentage of economic interest | 5.00% |
| Notes receivable from related parties | $ 33.5 |
| Interest income earned from related parties note | $ 0.9 |
| Weighted average stated interest rate of loans receivable | 4.60% |
| Remaining term of loans receivable | 4 years |