Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2015

Summary of Changes in the Partnership's Goodwill

A summary of changes in the Partnership’s goodwill during the fiscal years ended September 30, 2015 and 2014 are as follows (in thousands):

Balance as of September 30, 2013	$	201,130
Fiscal year 2014 business combination		8,201
Balance as of September 30, 2014		209,331
Fiscal year 2015 business combinations		1,714
Balance as of September 30, 2015	$	211,045

Components of Intangible Assets Subject to Amortization

Intangible assets subject to amortization consist of the following (in thousands):

	September 30,
	2015						2014
	Gross Carrying Amount		Accum. Amortization		Net		Gross Carrying Amount		Accum. Amortization		Net
Customer lists	$	322,027	$	236,438	$	85,589	$	304,699	$	224,215	$	80,484
Trade names and other intangibles		26,774		5,046		21,728		24,070		3,771		20,299
Total	$	348,801	$	241,484	$	107,317	$	328,769	$	227,986	$	100,783

Estimated Annual Amortization Expense Related to Intangible Assets Subject to Amortization

Total estimated annual amortization expense related to intangible assets subject to amortization, for the year ended September 30, 2016 and the four succeeding fiscal years ended September 30, is as follows (in thousands):

	Amount
2016	$	14,968
2017	$	14,448
2018	$	13,609
2019	$	13,374
2020	$	11,766