Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plans - Schedule of Future Share Settlements (Detail)

v3.8.0.1
Stock-Based Compensation Plans - Schedule of Future Share Settlements (Detail) - 2013 Omnibus Equity Incentive Plan [Member] - Deferred stock units [Member]
Mar. 31, 2018
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
2018 237,052
2021 60,373
2022 281,193
Total 578,618