Goodwill And Other Intangible Assets (Changes In Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014
Goodwill [Roll Forward]
Balance at March 31, 2014	$ 1,289,896
Acquisitions	14,158	[1]
Other adjustments, including foreign currency translation	533
Balance at June 30, 2014	1,304,587
Distribution Business Segment [Member]
Goodwill [Roll Forward]
Balance at March 31, 2014	1,092,728
Acquisitions	14,158	[1]
Other adjustments, including foreign currency translation	491
Balance at June 30, 2014	1,107,377
All Other Operations Business Segment [Member]
Goodwill [Roll Forward]
Balance at March 31, 2014	197,168
Acquisitions	0	[1]
Other adjustments, including foreign currency translation	42
Balance at June 30, 2014	$ 197,210

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