Income Taxes - Singapore subsidiary commitments (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 101,300
withholding tax	11,600
Inland Revenue, Singapore (IRAS) [Member]
Income Tax [Line Items]
Income tax benefit estimate attributable to the tax status of subsidiary	$ 13,900	$ 9,400	$ 5,800
Income tax expense benefit per diluted share	$ 0.10	$ 0.07	$ 0.04
additional effective tax rate benefit	$ 8,000	$ 5,400	$ 3,300