Quarterly report pursuant to Section 13 or 15(d)

Summary of Unvested Restricted Stock Units (Detail)

v3.8.0.1
Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs)
shares in Thousands
3 Months Ended
Mar. 31, 2018
shares
Shares  
Beginning Balance 1,789
Granted 223
Vested (35)
Ending Balance 1,977