Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.2
Subsequent Events - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Aug. 20, 2021
MPX New Jersey LLC [Member]          
Percentage of voting equity interests acquired         100.00%
Recapitalization | Selling, general and administrative expenses          
Restructuring costs incurred $ 2.0 $ 3.4 $ 3.9 $ 5.9  
Restructuring costs incurred to date $ 10.7   $ 10.7