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Summary Of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details) - Customer Lists	12 Months Ended
	Dec. 31, 2017
Minimum
Goodwill and Other Intangible Assets
Estimated useful lives of other intangible assets and goodwill	5 years
Maximum
Goodwill and Other Intangible Assets
Estimated useful lives of other intangible assets and goodwill	10 years

X

- Definition

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

+ References

No definition available.

+ Details

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- Definition

The useful lives used for other intangible assets and goodwill, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Details

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