Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reportable Segment) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Segment Reporting Information
Net balance – beginning of period	$ 351,114
Acquisitions	48,141
Measurement period adjustments	10,362
Foreign currency translation	3,451
Net balance – end of period	413,068
OEM Segment
Segment Reporting Information
Net balance – beginning of period	215,620
Acquisitions	48,141
Measurement period adjustments	(2,251)
Foreign currency translation	3,575
Net balance – end of period	265,085
Aftermarket Segment
Segment Reporting Information
Net balance – beginning of period	135,494
Acquisitions	0
Measurement period adjustments	12,613
Foreign currency translation	(124)
Net balance – end of period	$ 147,983