Intangible Assets (Notes)

6 Months Ended

Mar. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

The following table presents our intangible assets as of the dates specified below:

	March 31, 2014							September 30, 2013
Description	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Trade name and trademarks	$	3,905	$	(1,619	)	$	2,286	$	3,886	$	(1,368	)	$	2,518
Technology	45,985		(25,203		)	20,782		45,694		(22,427		)	23,267
Customer relationships	142,052		(51,820		)	90,232		141,586		(44,074		)	97,512
Total	$	191,942	$	(78,642	)	$	113,300	$	191,166	$	(67,869	)	$	123,297

Amortization expense totaled $5.2 million and $10.5 million for the three and six months ended March 31, 2014, respectively, and $4.5 million and $9.0 million for the same periods in 2013.

The following table presents the estimated future amortization expense related to intangible assets held at March 31, 2014:

Years Ending September 30,	Amortization of Intangible Assets
2014 (April 1, 2014 through September 30, 2014)	$	10,464
2015	20,812
2016	18,458
2017	16,939
2018	15,797
Thereafter	30,830
Total	$	113,300