Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Earnings before Income Taxes (Detail)

v3.6.0.2
Income Taxes - Summary of Earnings before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Expected income tax expense $ 125,819 $ 116,724 $ 66,981
State income tax, net of federal benefit 2,335 2,011 1,032
Rate differential on foreign income (58,508) (44,541) (27,364)
Change in unrecognized tax benefits 135 (2,233) (2,717)
Non-deductible expenses 2,330 (350) 288
Other 575 285 3,333
Change in valuation allowance 1,439 554 (2,369)
Total income taxes (benefit) $ 74,125 $ 72,450 $ 39,184
Effective tax rate 20.60% 21.70% 20.50%