Segment Information (Revenue By Geographic Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2013
Revenue		$ 1,255,242	$ 1,356,967		$ 1,293,541
Total long-lived intangible assets		65,162	67,783		64,652
Americas [Member]
Revenue		530,311	558,671	[1]	522,788	[1]
Total long-lived intangible assets	[2]	47,509	51,027		49,788
Europe [Member]
Revenue		467,805	528,090	[3]	479,877	[3]
Total long-lived intangible assets		7,424	7,020		5,557
Pacific Rim [Member]
Revenue		139,165	148,151		161,587
Japan [Member]
Revenue		117,961	122,055		129,289
Asia Pacific Member
Total long-lived intangible assets		10,229	9,736		9,307
United States [Member]
Revenue		500,600	518,700		485,200
Germany [Member]
Revenue		$ 177,100	$ 200,300		$ 167,200

[1] Includes revenue in the United States totaling $500.6 million, $518.7 million and $485.2 million for 2015, 2014 and 2013, respectively.

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

[3] Includes revenue in Germany totaling $177.1 million, $200.3 million and $167.2 million for 2015, 2014 and 2013, respectively.