Revenue - Percentages of Sales by End Market (Details) - End Market - Sales	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Percentage of Sales by End Market [Line Items]
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Manufacturing
Percentage of Sales by End Market [Line Items]
Percentage of sales	68.90%	62.70%	68.60%	61.70%
Non-residential construction
Percentage of Sales by End Market [Line Items]
Percentage of sales	11.30%	11.20%	11.20%	11.40%
Other
Percentage of Sales by End Market [Line Items]
Percentage of sales	19.80%	26.10%	20.20%	26.90%