Basis and Summary of Significant Accounting Policies - Lease Merchandise (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 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	$ 1,137,428		$ 1,152,135
Components of the allowance of leases merchandise write-offs:
Beginning Balance	35,629	$ 33,399
Merchandise Written off, net of Recoveries	(80,856)	(61,034)
Provision for Write-offs	91,420	63,938
Ending Balance	46,193	$ 36,303
Merchandise on Lease
Significant Accounting Policies [Line Items]
Lease Merchandise, net of Accumulated Depreciation and Allowances	$ 909,700		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	$ 227,728		$ 243,867