Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2019
USD ($)
portfolio_segment
segment
|
Dec. 31, 2018
USD ($)
|
|
Summary Of Significant Accounting Policies [Line Items] | ||
Number of reportable segments | segment | 1 | |
Uninsured cash and cash equivalents | $ 40.5 | $ 25.1 |
Number of portfolio segments | portfolio_segment | 2 | |
Period after Consumer Loan assignment that Dealer Loans written off | 120 months | |
Period after month of purchase that Purchased Loans written off | 120 months | |
Right-of-use asset | $ 3.7 | |
Lease liability | 3.8 | |
Restricted Cash and Cash Equivalents [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Uninsured cash and cash equivalents | $ 414.4 | $ 303.0 |