Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Summary of Income Tax Expense and Effective Tax Rate (Detail)

v3.7.0.1
Income Taxes - Summary of Income Tax Expense and Effective Tax Rate (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Income Tax Disclosure [Abstract]        
Income tax expense $ 14,109 $ 12,200 $ 31,516 $ 42,768
Effective tax rate 16.10% 12.70% 14.90% 18.10%