Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reportable Segment) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Segment Reporting Information
Net balance – beginning of period	$ 454,728
Acquisitions	34,638
Measurement period adjustments	9,433
Foreign currency translation	(2,377)
Net balance – end of period	496,422
OEM Segment
Segment Reporting Information
Net balance – beginning of period	305,953
Acquisitions	24,448
Measurement period adjustments	9,456
Foreign currency translation	(2,528)
Net balance – end of period	337,329
Aftermarket Segment
Segment Reporting Information
Net balance – beginning of period	148,775
Acquisitions	10,190
Measurement period adjustments	(23)
Foreign currency translation	151
Net balance – end of period	$ 159,093