Basis and Summary of Significant Accounting Policies - Hurricane Impact (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2018 |
|
| Accounting Policies [Abstract] | ||
| Estimated losses related to merchandise on hand an on lease destroyed or severely damaged | $ 2.9 | |
| Insurance proceeds received, before tax | 1.5 | |
| Accounts receivable and lease merchandise, additional reserves recorded | $ 3.6 | |
| Partial cash payment from insurer | $ 2.2 | |
| Insurance settlements receivable | $ 1.8 |