Goodwill and Intangible Assets - Intangible Assets by Major Asset Class (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Intangible Assets By Major Class [Line Items]
Gross	$ 514,324,000	$ 539,322,000
Accumulated Amortization	48,628,000	45,899,000
Net Book Value	465,696,000	493,423,000
Finite-Lived Intangible Assets, Translation and Purchase Accounting Adjustments	496,000
Indefinite-lived Intangible Assets, Translation and Purchase Accounting Adjustments	64,000
Patents
Intangible Assets By Major Class [Line Items]
Gross	31,581,000	31,581,000
Accumulated Amortization	31,581,000	31,581,000
Net Book Value	$ 0	0
Patents | Minimum
Intangible Assets By Major Class [Line Items]
Useful Life (years)	2 years
Patents | Maximum
Intangible Assets By Major Class [Line Items]
Useful Life (years)	16 years
Other Intangible Assets
Intangible Assets By Major Class [Line Items]
Gross	$ 54,304,000	53,904,000
Accumulated Amortization	17,047,000	14,318,000
Net Book Value	$ 37,257,000	39,586,000
Other Intangible Assets | Minimum
Intangible Assets By Major Class [Line Items]
Useful Life (years)	1 year
Other Intangible Assets | Maximum
Intangible Assets By Major Class [Line Items]
Useful Life (years)	10 years
Trade name, trademark and trade dress and other
Intangible Assets By Major Class [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)	$ 25,894,000
Gross	428,439,000	453,837,000
Net Book Value	$ 428,439,000	$ 453,837,000