Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reportable Segment) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Segment Reporting Information
Net balance – beginning of period	$ 351,114
Acquisitions	57,686
Measurement period adjustments	10,267
Foreign currency translations	(228)
Net balance – end of period	418,839
OEM Segment
Segment Reporting Information
Net balance – beginning of period	215,620
Acquisitions	57,686
Measurement period adjustments	(2,346)
Foreign currency translations	70
Net balance – end of period	271,030
Aftermarket Segment
Segment Reporting Information
Net balance – beginning of period	135,494
Acquisitions	0
Measurement period adjustments	12,613
Foreign currency translations	(298)
Net balance – end of period	$ 147,809