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Discontinued Operations
12 Months Ended
Dec. 31, 2019
Discontinued Operations And Disposal Groups [Abstract]  
Discontinued Operations

5.    Discontinued Operations

In the twelve months ended December 31, 2018 and 2017, the loss on discontinued operations of $0.2 million and $2.6 million, respectively, is primarily related to the prior sale of the Waterloo tool storage and Simonton window businesses.