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Fixed Assets, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment
Depreciation expense	$ 4.3	$ 4.9
Adjustments to impairment	0.0	(0.3)
Software, including software development costs
Property, Plant and Equipment
Software development costs capitalized	0.6	1.3
Amortization of software development costs	$ 0.3	$ 0.3

X

- Definition

Additions made to capitalized computer software costs during the period.

+ References

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Amount of expense for amortization of capitalized computer software costs.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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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.

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