The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Other Intangibles - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Finite Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 0.4	$ 0.3	$ 0.9	$ 0.6
2020	0.8		0.8
2021	1.5		1.5
2022	1.5		1.5
2023	1.5		1.5
2024	$ 1.5		$ 1.5
Remaining amortization period			12 years 9 months 18 days
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			5 years 6 months
Land Use Rights [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			55 years 3 months 18 days
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			8 years 6 months
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			10 years 7 months 6 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Remaining amortization period			9 years 10 months 24 days