Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Earnings (Loss) before Income Taxes and Income Tax Expense (Benefit) (Detail)

v3.10.0.1
Income Taxes - Schedule of Earnings (Loss) before Income Taxes and Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Effective tax rate 14.00% 38.80% 20.60%
Earnings (loss) before income taxes $ 431,884 $ 384,260 $ 359,484
Income tax expense 60,611 149,156 74,125
Domestic [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 16,597 25,628 105,589
Income tax expense 11,500 113,607 44,654
Hong Kong [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 48,352 17,778 15,156
Income tax expense 8,106 5,030 5,206
Peoples Republic of China [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 89,429 95,668 72,584
Income tax expense 19,595 12,971 11,720
Jersey [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 213,327 198,048 146,880
Non-benefited loss operations [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes (11,422) (17,350) (16,189)
Income tax expense (3,387) 3,306 12
Other jurisdictions [Member]      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 75,601 64,488 35,464
Income tax expense $ 24,797 $ 14,242 $ 12,533