Business and Summary of Significant Accounting Policies - Store Count by Ownership Type (Footnote) (Details)	12 Months Ended
	Dec. 31, 2015 store transaction	Dec. 31, 2014 store	Dec. 31, 2013 store
Accounting Policies [Abstract]
Franchises granted (in number of stores) | store	813	920	940
Operating Segments | Progressive
Significant Accounting Policies [Line Items]
Virtual lease to own transactions completed (at least) | transaction	1