Description Of Business (Narrative) (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) portfolio_segment loan
Description Of Business [Abstract]
Number of Portfolio Segments | portfolio_segment	2
Number of consumers required to group advances	100
Number of Consumer Loans assigned to receive accelerated Dealer Holdback payment	100
Servicing fee percentage in collections	20.00%
One-time enrollment fee in program | $	$ 9,850
Percentage of enrollment fee of first accelerated dealer holdback payment	50.00%