Loans Receivable - Components of the Allowance for Loan Losses (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Oct. 15, 2015
Components of the Allowance For Loan Losses:
Beginning Balance	[1]	$ 6,624	$ 937
Provision for Loan Losses		15,140	7,461
Charge-offs		(11,795)	(2,832)
Recoveries		493	23
Ending Balance		$ 10,462	$ 5,589
DAMI | Progressive Leasing | Progressive Subsidiary
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable				$ 89,100

[1] The Company acquired DAMI on October 15, 2015 and recorded $89.1 million of loans receivable as of the acquisition date. No corresponding allowance for loan losses was recorded as the loans receivable were established at fair value in acquisition accounting. The January 1, 2016 balance represents the provision for loan losses incurred from October 15, 2015 to December 31, 2015.