Goodwill and Intangibles, net (Tables)

6 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in the Company's Goodwill

A summary of changes in Company’s goodwill is as follows (in thousands):

Balance as of September 30, 2018	$	228,436
Fiscal year 2019 business combinations		10,858
Balance as of March 31, 2019	$	239,294

Intangible Assets Subject to Amortization

The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows (in thousands):

	March 31, 2019						September 30, 2018
	Gross						Gross
	Carrying		Accum.				Carrying		Accum.
	Amount		Amortization		Net		Amount		Amortization		Net
Customer lists	$	359,073	$	288,214	$	70,859	$	358,776	$	279,990	$	78,786
Trade names and other intangibles		32,740		14,110		18,630		32,739		13,081		19,658
Total	$	391,813	$	302,324	$	89,489	$	391,515	$	293,071	$	98,444