Income Taxes - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 USD ($) tax_audit	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Income Tax Disclosure [Line Items]
Effective income tax rates (percent)	7.10%	17.50%
Excess tax benefit amount	$ 6,900,000	$ 4,600,000
Effective income tax rate, percent prior to adoption of accounting standards update (percent)	28.00%	26.00%
Unrecognized income tax benefit	$ 4,500,000		$ 4,300,000
Minimum
Income Tax Disclosure [Line Items]
Change in uncertain tax positions	0
Maximum
Income Tax Disclosure [Line Items]
Change in uncertain tax positions	$ 800,000
State
Income Tax Disclosure [Line Items]
Number of income tax audits in process | tax_audit	1