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Goodwill (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) divestiture
Goodwill [Roll Forward]
Goodwill at the beginning of year			$ 392,978
Increase in goodwill related to acquisitions	$ 0	$ 14,054
Decrease in goodwill related to divestitures		(5,736)	(1,006)
Decrease in goodwill related to impairments		$ (13,632)	0
Goodwill at the end of the period	$ 391,972		$ 391,972
Number of Businesses Sold (Goodwill Allocation) | divestiture			1

X

- Definition

Goodwill, Written Off Due To Discontinued Operations

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Number of Businesses Sold (Goodwill Allocation)

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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