Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Depreciation	$ 65,181	$ 62,784	$ 52,936	[1]
Capitalized computer software amortization expense	40,200	37,200	24,200
Unamortized computer software costs	129,900	118,800
Capitalized computer software write down	$ 300	$ 1,800	$ 8,700

[1] The Company applied the modified retrospective transition method when adopting ASU 2016-02 "Leases", therefore the Company's 2018 prior results were not restated to reflect ASU 2016-02. Refer to footnote 14.