Goodwill (Tables)

6 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes to the carrying amount of goodwill

The following table presents the Company's carrying amount of goodwill as of March 31, 2020 and September 30, 2019.

	March 31, 2020		September 30, 2019
	(dollars in thousands)
Balance, beginning of period	$	739,023	$	739,023
Goodwill acquired during the period	1,539		—
Goodwill impairment during the period	(740,562)		—
Balance, end of period	$	—	$	739,023