Goodwill and Other Intangibles - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets	$ 587,528,000	$ 553,114,000
Intangible assets, accumulated amortization	207,900,000	248,000,000.0
Indefinite-lived intangible assets	0	$ 0
Impairment of amortizable intangible assets	$ 4,300,000