Segment Information (Revenue By Geographic Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Revenue	$ 1,356,967		$ 1,293,541		$ 1,255,679
Total long-lived intangible assets	67,783		64,652		63,466
Americas [Member]
Revenue	558,671		522,788	[1]	479,932	[1]
Total long-lived intangible assets	51,027	[2]	49,788	[2]	46,083	[2]
Europe [Member]
Revenue	528,090		479,877	[3]	480,287	[3]
Total long-lived intangible assets	7,020		5,557		6,649
Pacific Rim [Member]
Revenue	148,151		161,587		160,834
Japan [Member]
Revenue	122,055		129,289		134,626
Asia Pacific Member
Total long-lived intangible assets	9,736		9,307		10,734
United States [Member]
Revenue	518,700		485,200		453,200
Germany [Member]
Revenue	$ 200,300		$ 167,200		$ 188,300

[1] Includes revenue in the United States totaling $518.7 million, $485.2 million and $453.2 million for 2014, 2013 and 2012, respectively.

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

[3] Includes revenue in Germany totaling $200.3 million, $167.2 million and $188.3 million for 2014, 2013 and 2012, respectively.