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Goodwill and Intangible Assets
6 Months Ended
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Note 4 — Goodwill and Intangible Assets

The Partnership’s goodwill and intangible assets comprise the following:
 
 
March 31,
2016
 
September 30,
2015
 
March 31,
2015
Goodwill (not subject to amortization)
 
$
1,971,999

 
$
1,956,688

 
$
1,950,327

Intangible assets:
 
 
 
 
 
 
Customer relationships and noncompete agreements
 
$
523,783

 
$
514,333

 
$
512,436

Accumulated amortization
 
(182,665
)
 
(163,564
)
 
(146,782
)
Intangible assets, net (definite-lived)
 
341,118

 
350,769

 
365,654

Trademarks and tradenames (indefinite-lived)
 
82,944

 
82,944

 
82,944

Total intangible assets, net
 
$
424,062

 
$
433,713

 
$
448,598



Amortization expense of intangible assets was $9,693 and $9,521 for the three months ended March 31, 2016 and 2015, respectively. Amortization expense of intangible assets was $19,101 and $19,014 for the six months ended March 31, 2016 and 2015, respectively. No amortization expense is included in cost of sales on the Condensed Consolidated Statements of Operations. The estimated aggregate amortization expense of intangible assets for the remainder of Fiscal 2016 and the next four fiscal years is as follows: remainder of Fiscal 2016$19,051; Fiscal 2017$36,223; Fiscal 2018$34,863; Fiscal 2019$33,667; Fiscal 2020$32,484.