XML 81 R69.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-Based Compensation Plans - Outstanding Awards Under 2013 Omnibus Equity Incentive Plan (Parenthetical) (Detail)
6 Months Ended
Jun. 30, 2021
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Unrecognized stock-based compensation expenses recognition period 3 years 6 months 18 days