Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Valuation allowance	$ 19,865				$ 21,929				$ 19,865	$ 21,929
Deferred tax liability not recognized related to tax basis difference in investment in foreign subsidiaries	22,900								22,900
Income tax provision	10,624	$ 19,857	$ 21,313	$ 19,930	7,834	$ 19,964	$ 14,113	$ 15,270	71,724	57,181	$ (20,857)
Liability for uncertain tax positions	$ 11,100				$ 3,700				$ 11,100	$ 3,700