Acquisitions, Goodwill And Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Accumulated amortization	$ 125,825	$ 104,764
Total gross cost	467,251	281,106
Total net balance	341,426	176,342
OEM Segment
Finite-Lived Intangible Assets
Total net balance	164,047	159,803
Aftermarket Segment
Finite-Lived Intangible Assets
Total net balance	177,379	16,539
Purchased Research and Development
Finite-Lived Intangible Assets
Gross cost and net balance	4,687	4,687
Trade name
Finite-Lived Intangible Assets
Gross cost and net balance	7,600	7,600
Customer relationships
Finite-Lived Intangible Assets
Gross cost	319,934	191,919
Accumulated amortization	69,008	54,889
Net balance	$ 250,926	$ 137,030
Customer relationships | Minimum
Finite-Lived Intangible Assets
Estimated useful life in years	6 years	6 years
Customer relationships | Maximum
Finite-Lived Intangible Assets
Estimated useful life in years	17 years	16 years
Patents
Finite-Lived Intangible Assets
Gross cost	$ 76,206	$ 58,787
Accumulated amortization	44,611	40,079
Net balance	$ 31,595	$ 18,708
Patents | Minimum
Finite-Lived Intangible Assets
Estimated useful life in years	3 years	3 years
Patents | Maximum
Finite-Lived Intangible Assets
Estimated useful life in years	19 years	19 years
Trade name
Finite-Lived Intangible Assets
Gross cost	$ 50,917	$ 10,885
Accumulated amortization	7,086	5,507
Net balance	$ 43,831	$ 5,378
Trade name | Minimum
Finite-Lived Intangible Assets
Estimated useful life in years	3 years	3 years
Trade name | Maximum
Finite-Lived Intangible Assets
Estimated useful life in years	20 years	15 years
Non-compete agreements
Finite-Lived Intangible Assets
Gross cost	$ 7,598	$ 6,919
Accumulated amortization	4,947	4,148
Net balance	$ 2,651	$ 2,771
Non-compete agreements | Minimum
Finite-Lived Intangible Assets
Estimated useful life in years	3 years	3 years
Non-compete agreements | Maximum
Finite-Lived Intangible Assets
Estimated useful life in years	6 years	6 years
Other
Finite-Lived Intangible Assets
Gross cost	$ 309	$ 309
Accumulated amortization	173	141
Net balance	$ 136	$ 168
Other | Minimum
Finite-Lived Intangible Assets
Estimated useful life in years	2 years	2 years
Other | Maximum
Finite-Lived Intangible Assets
Estimated useful life in years	12 years	12 years