Business and Summary of Significant Accounting Policies - Hurricane Impact (Details)	12 Months Ended
	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Estimated losses related to merchandise on hand and on lease destroyed or severely damaged	$ 4,700,000
Insurance proceeds received, before tax	3,300,000
Partial cash payment from insurer	400,000
Insurance receivable	2,900,000
Accounts receivable and lease merchandise, additional reserves recorded	3,600,000
Insurance proceeds related to business interruption loss	$ 0