Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Operating loss carryforwards, not subject to expiration	$ 17,400,000
Cash payments for income taxes, including interest	18,100,000	$ 28,900,000
Proceeds from income tax refunds	24,300,000	9,800,000
Liability for unrecognized tax benefits	11,520,000	9,568,000	$ 13,585,000
Unrecognized tax benefits highly certain	3,100,000	1,900,000
Unrecognized tax benefits that would impact effective tax rate	8,400,000	7,700,000
Accrued interest	1,300,000	600,000
Penalties expense	700,000	100,000
Penalties accrued	$ 0	$ 0