Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Narrative (Details)

v3.20.4
Intangible Assets - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets      
Amortization expense for intangibles $ 17,100,000 $ 17,600,000 $ 19,400,000
Intangible asset impairment charge $ 0   $ 0
Aerospace      
Finite-Lived Intangible Assets      
Intangible asset impairment charge   $ 6,200,000