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Significant Accounting Policies and Consolidated Financial Statement Components Schedule of Aging of delinquent loans and fees receivable, gross (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Threshold period past due for Non-Accrual of Finance Receivable 90 days  
Weighted Average Remaining Accretion Period of Deferred Revenue 11 months 11 months
Delinquent loans and fees receivable, gross $ 53,600 $ 38,400
Current loans and fees receivable, gross 340,300 252,300
Loans and fees receivable, gross 393,900 290,700
Balance of loans 90 or more days past due and still accruing interest and fees $ 1,600 $ 1,500
Effective Income Tax Rate Reconciliation, Percent 13.50% 48.70%
(Loss) income before income taxes $ (47,250) $ (12,356)
Unrecognized Tax Benefits, Income Tax Penalties Expense 500 400
Income tax settlement amount with taxing authority 7,400  
Income Tax Examination, Interest Accrued $ 4,100  
Threshold Period Following Bankruptcy Notice for Write-off of Finance Receivable 30 days  
Credit Card Receivable [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Threshold Period Past Due for Write-off of Financing Receivable 180 days  
Delinquent loans and fees receivable, gross $ 11,400 800
Current loans and fees receivable, gross 75,800 10,200
Loans and fees receivable, gross 87,200 11,000
Balance of loans 90 or more days past due and still accruing interest and fees $ 0 0
Automobile Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Threshold Period Past Due for Write-off of Financing Receivable 180 days  
Delinquent loans and fees receivable, gross $ 10,400 11,300
Current loans and fees receivable, gross 67,400 65,800
Loans and fees receivable, gross 77,800 77,100
Balance of loans 90 or more days past due and still accruing interest and fees $ 1,600 1,500
Other Unsecured Lending Products [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Threshold Period Past Due for Write-off of Financing Receivable 120 days  
Delinquent loans and fees receivable, gross $ 31,800 26,300
Current loans and fees receivable, gross 197,100 176,300
Loans and fees receivable, gross 228,900 202,600
Balance of loans 90 or more days past due and still accruing interest and fees 0 0
Financing Receivables, 30 to 59 Days Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 18,600 15,400
Financing Receivables, 30 to 59 Days Past Due [Member] | Credit Card Receivable [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 3,200 200
Financing Receivables, 30 to 59 Days Past Due [Member] | Automobile Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 6,400 7,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Other Unsecured Lending Products [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 9,000 8,200
Financing Receivables, 60 to 89 Days Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 12,500 9,300
Financing Receivables, 60 to 89 Days Past Due [Member] | Credit Card Receivable [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 3,300 200
Financing Receivables, 60 to 89 Days Past Due [Member] | Automobile Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 2,100 2,400
Financing Receivables, 60 to 89 Days Past Due [Member] | Other Unsecured Lending Products [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 7,100 6,700
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 22,500 13,700
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Credit Card Receivable [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 4,900 400
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Automobile Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross 1,900 1,900
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Other Unsecured Lending Products [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Delinquent loans and fees receivable, gross $ 15,700 $ 11,400