Revenue - Percentages of Sales by End Market (Details) - End Market - Sales	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
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	62.70%	67.50%	61.70%	67.50%
Non-residential construction
Percentage of Sales by End Market [Line Items]
Percentage of sales	11.20%	13.00%	11.40%	12.90%
Other
Percentage of Sales by End Market [Line Items]
Percentage of sales	26.10%	19.50%	26.90%	19.60%