Income Taxes - Narrative (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax provision	$ 14,171,000	$ 1,298,000
Deferred tax asset valuation allowance	12,000,000.0
Issuance of stock for charitable contributions	91,300,000
Charitable cash contribution	$ 3,700,000