Annual report pursuant to Section 13 and 15(d)

Employee Defined Contribution Plans and Multi-Employer Pension Plans - Schedule of Employee Defined Contribution Plans and Multi-Employer Pension Plans (Detail)

v3.10.0.1
Employee Defined Contribution Plans and Multi-Employer Pension Plans - Schedule of Employee Defined Contribution Plans and Multi-Employer Pension Plans (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Retirement Benefits [Abstract]    
Pension Fund IAM National Pension Fund  
EIN 516031295  
Pension Plan Number 002  
Pension Protection Act Zone Status Green Green
FIP/RP Status Pending/Implemented No  
Company Contributions $ 3.3 $ 3.3
Surcharge Imposed No  
Expiration Date of Collective-Bargaining Agreement Nov. 06, 2022  
Green Zone Funded Status At least 80 percent