Segment Information (Revenue By Geographic Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Revenue	$ 1,293,541		$ 1,255,679		$ 1,166,949
Total long-lived intangible assets	64,652		63,466		62,569
Americas [Member]
Revenue	522,788		479,932	[1]	429,213	[1]
Total long-lived intangible assets	49,788	[2]	46,083	[2]	42,767	[2]
Europe [Member]
Revenue	479,877		480,287	[3]	466,540	[3]
Total long-lived intangible assets	5,557		6,649		6,989
Pacific Rim [Member]
Revenue	161,587		160,834		147,992
Japan [Member]
Revenue	129,289		134,626		123,204
Asia Pacific Member
Total long-lived intangible assets	9,307		10,734		12,813
United States [Member]
Revenue	485,200		453,200		408,000
Germany [Member]
Revenue	$ 167,200		$ 188,300		$ 173,300

[1] Includes revenue in the United States totaling $485.2 million, $453.2 million and $408.0 million for 2013, 2012 and 2011, respectively.

[2] Substantially all of the Americas long-lived tangible assets are located in the United States.

[3] Includes revenue in Germany totaling $167.2 million, $188.3 million and $173.3 million for 2013, 2012 and 2011, respectively.