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Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On July 12, 2018, the Company acquired the Precision Filtration division of Precision Custom Coatings based in Totowa, NJ for $1.0 million in cash with an additional cash payment to be made of up to $2.0 million based on the achievement of certain future financial targets through 2022. Precision Filtration is a long-time producer of high-quality, air filtration media serving principally the commercial and residential HVAC markets with a range of low efficiency through high-performing air filtration media. The acquisition will be included in Lydall’s Performance Materials operating segment.