Revenue	12 Months Ended
	Dec. 31, 2021
Revenue [Abstract]
Revenue	3. REVENUE The following table summarizes the percentages of our net sales attributable to each of our vertical markets for the years ended December 31, 2021, 2020 and 2019: For the Years Ended December 31, 2021 2020 2019 Construction 58.6% 58.2% 58.4%CIG 25.4 26.7 26.4 Industrial & Utility 16.0 15.1 15.2 Total net sales 100.0% 100.0% 100.0% Certain reclassifications have been made to the vertical market assigned to customers in the prior years’ information to conform to the December 31, 2021 presentation. We had no material contract assets, contract liabilities, or deferred contract costs recorded on the consolidated balance sheet as of December 31, 2021 and 2020. In addition, for the years ended December 31, 2021, 2020 and 2019, revenue recognized in the reporting period that was included in the contract liability balance at the beginning of the period is not material.