Equity-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Historical Activity for Units

A summary of the Company’s historical activity for the Units is presented in the following table:

Class B Units	Shares
Outstanding at January 1, 2017		7,051,000
Granted		1,304,000
Less: Redeemed		155,000
Less: Forfeited		650,000
Outstanding at September 30, 2017		7,550,000

Summary of Stock Options Activity

A summary of the Company’s stock option activity for the year ended September 30, 2020 is presented in the following table:

Stock Options	Shares		Weighted Average Exercise Price
Outstanding at October 1, 2019		6,574,000	$	20.48
Grants		960,000		16.87
Less: Exercised		14,000		13.58
Less: Forfeited and expired options		809,000		19.69
Outstanding at September 30, 2020		6,711,000		20.08
Vested and exercisable at September 30, 2020		3,037,000		21.40
Expected to vest after September 30, 2020		3,674,000	$	18.95

Schedule of Weighted-Average Assumptions Used in Valuation of Unit Awards, Restricted Stock Unit Awards Were Converted and Stock Option Awards Granted or Modified

The weighted-average assumptions used in the valuation of Unit awards, restricted stock into which such Unit awards were converted and stock option awards granted or modified for the years ended September 30, 2020, September 30, 2019 and September 30, 2018 are presented in the table below:

	Fiscal Year Ended
	September 30, 2020			September 30, 2019			September 30, 2018
Assumptions:
Risk-free interest rate		1.56	%		2.85	%		2.77	%
Dividend yield		—			—			—
Volatility factor		43.51	%		38.85	%		26.93	%
Expected term (in years)		6.3			6.3			6.0