Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Activity Related to Company's Unrecognized Tax Benefits (Detail)

v3.6.0.2
Income Taxes - Summary of Activity Related to Company's Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Beginning balance $ 8,330 $ 3,438 $ 3,182
Additions based on tax positions related to the current year 1,023 557 228
Additions for tax positions of prior years 27 4,335 28
Reductions for tax positions of prior years (4,335)    
Ending balance $ 5,045 $ 8,330 $ 3,438