Business Segment Reporting - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended |
---|---|---|
Jun. 30, 2016 |
Jun. 30, 2017 |
|
Lending [Member] | ||
Segment Reporting Information [Line Items] | ||
Decrease in income before income taxes | $ (2.5) | $ (5.1) |