Quarterly report pursuant to Section 13 or 15(d)

Income Tax Benefit/Expense - Additional Information (Detail)

v3.7.0.1
Income Tax Benefit/Expense - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]    
Income tax expense (benefit) $ 2,342 $ 63,496
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   $ 73,100