Goodwill and Other Intangible Assets - Other Intangible Assets, Changes in Net Carrying Amount (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Gross Amount
Other intangible assets, beginning	$ 964,653	$ 423,846
Intangible assets acquired, purchase accounting adjustment	1,077
Intangible assets acquired during the period		557,390
Currency translation effect on foreign balances	(1,788)	(2,924)
Other intangible assets, ending	956,828	964,653
Finite-Lived Intangible Assets, Disposal of Intangible Assets	(7,114)	(13,659)
Amortization of Intangible Assets, Adjustment for Disposal	7,114	13,659
Accumulated Amortization
Other intangible assets, beginning	(94,136)	(76,634)
Amortization expense	(40,882)	(32,927)
Currency translation effect on foreign balances	1,374	1,766
Other intangible assets, ending	$ (126,530)	$ (94,136)