Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.7.0.1
Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
Jun. 30, 2017
USD ($)
ASU No. 2016-09 [Member]  
Change In Accounting Estimate [Line Items]  
Gross cumulative effect $ 7.5