Goodwill And Other Intangible Assets (Changes In Goodwill) (Details) $ in Thousands		3 Months Ended
		Jun. 30, 2015 USD ($)
Goodwill [Roll Forward]
Balance at March 31, 2015		$ 1,313,644
Acquisitions	[1]	11,884
Other adjustments, including foreign currency translation		3,023
Balance at June 30, 2015		1,328,551
Distribution Business Segment [Member]
Goodwill [Roll Forward]
Balance at March 31, 2015		1,116,569
Acquisitions	[1]	11,884
Other adjustments, including foreign currency translation		3,007
Balance at June 30, 2015		1,131,460
All Other Operations Business Segment [Member]
Goodwill [Roll Forward]
Balance at March 31, 2015		197,075
Acquisitions	[1]	0
Other adjustments, including foreign currency translation		16
Balance at June 30, 2015		$ 197,091

[1] Includes acquisitions completed during the current year and adjustments made to prior year acquisitions.