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Asset-Backed Securities Issued - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018
Asset-backed securities issued | Contractual maturities of over five years
Debt Instrument [Line Items]
Contractual maturities of ABS (in years)	5 years

X

- Definition

Long Term Marketable Securities Maturities Term

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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