Basis and Summary of Significant Accounting Policies - Lease Merchandise (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Significant Accounting Policies [Line Items]
Lease merchandise salvage value percentage			0.00%
Lease agreement, lease period used as asset useful life	12 months
Lease Merchandise, net of Accumulated Depreciation and Allowances			$ 1,132,096	$ 1,152,135
Components of the allowance of leases merchandise write-offs:
Beginning Balance	$ 35,629	$ 33,399
Merchandise Written off, net of Recoveries	(40,511)	(30,140)
Provision for Write-offs	44,470	30,790
Ending Balance	$ 35,629	$ 33,399	39,588	35,629	$ 34,049
Merchandise on Lease
Significant Accounting Policies [Line Items]
Lease Merchandise, net of Accumulated Depreciation and Allowances			903,133	908,268
Merchandise on Lease | Minimum
Significant Accounting Policies [Line Items]
Lease merchandise useful life	12 months
Merchandise on Lease | Maximum
Significant Accounting Policies [Line Items]
Lease merchandise useful life	24 months
Merchandise not on Lease
Significant Accounting Policies [Line Items]
Lease merchandise useful life	36 months
Lease Merchandise, net of Accumulated Depreciation and Allowances			$ 228,963	$ 243,867