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Loans to Bank Customers - Credit Quality Indicators (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | $ 21,917 | $ 18,570
Non-Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 22,485 | 18,025
Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 766 | 836
Residential | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 3,373 | 3,038
Residential | Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 422 | 516
Commercial | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 180 | 315
Commercial | Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 0 | 0
Installment | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 665 | 1,059
Installment | Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 344 | 320
Secured credit card | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | 18,267 | 13,613
Secured credit card | Classified |  |
Outstanding Loans [Line Items] |  |
Loans to bank customers, carrying amount | $ 0 | $ 0

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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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