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Summary of Significant Accounting Policies - Goodwill and Other Indefinite-Lived Intangible Assets (Details) unit in Thousands, $ in Thousands		12 Months Ended
	Oct. 01, 2017 USD ($)	Dec. 31, 2019 USD ($) unit	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Intangible impairments | $	$ 3,011	$ 0	$ 0	$ 3,011
Number of reporting units | unit		9

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- References

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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No definition available.

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