Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Gross carrying Amount	$ 743,280	$ 638,775
Accumulated amortization	409,328	343,088
Net carrying value	$ 333,952	$ 295,687
Weighted average life in years	9 years 8 months 12 days	8 years 10 months 24 days
Developed Technology
Finite-Lived Intangible Assets
Gross carrying Amount	$ 272,334	$ 248,776
Accumulated amortization	204,689	176,421
Net carrying value	$ 67,645	$ 72,355
Weighted average life in years	7 years 1 month 6 days	7 years
Trademarks and Trade names
Finite-Lived Intangible Assets
Gross carrying Amount	$ 29,106	$ 25,643
Accumulated amortization	16,326	14,749
Net carrying value	$ 12,780	$ 10,894
Weighted average life in years	10 years 1 month 6 days	10 years 6 months
Customer Relationships
Finite-Lived Intangible Assets
Gross carrying Amount	$ 405,537	$ 328,050
Accumulated amortization	161,551	133,068
Net carrying value	$ 243,986	$ 194,982
Weighted average life in years	11 years 9 months 18 days	10 years 9 months 18 days
Other
Finite-Lived Intangible Assets
Gross carrying Amount	$ 36,303	$ 36,306
Accumulated amortization	26,762	18,850
Net carrying value	$ 9,541	$ 17,456
Weighted average life in years	4 years 1 month 6 days	4 years 1 month 6 days