Segment Information - Reconciliation of Total Segment Profit to Operating Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Total segment profit	$ 367,898	$ 386,259	$ 313,053
Amortization of intangibles	66,428	62,152	44,023
Unallocated general and administrative expenses	62,192	31,418	27,213
Operating income	239,278	292,689	241,817
Interest expense	46,962	34,094	32,343
Interest income	4,652	3,839	715
Other (income) expense, net	(121,081)	8,002	25,458
Income before income tax expense	$ 318,049	$ 254,432	$ 184,731