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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 6, 2017, the Corporation announced the closure of its Colville, Washington hearth manufacturing facility as part of its continued efficiency and simplification activities to deliver consistent, flawless execution to customers and to reduce structural costs. The Corporation estimates the consolidation will save $2.8 million annually beginning in Q4 2017. The Corporation estimates pre-tax charges of $6.7 million related to the closure and consolidation.