Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued bonuses	$ 23,595		$ 20,553
Accrued payroll and severance	23,718		15,932
Accrued taxes	70,350		85,346
Accrued commissions/rebates	77,430		60,593
Other	80,418		79,170
Total	$ 275,511	[1]	$ 261,594

[1] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using a modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 14.