Payout percentage on the basis of performance of award.

No definition available.

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- Definition

Grant date fair value of equity instruments other than options that were granted during the period.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Stockholders' Equity - Restricted stock (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2019
Stock Option
Equity-based compensation expense		$ 5.6	$ 5.4	$ 16.8	$ 21.4
Performance Percentage Less Than 25%
Weighted-Average Grant Date Fair Value per Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Payout Percentage				0.00%
Performance Percentage Greater Than or Equal to 25%
Weighted-Average Grant Date Fair Value per Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Payout Percentage				50.00%
Performance Percentage Equal to 50%
Weighted-Average Grant Date Fair Value per Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Payout Percentage				100.00%
Performance Percentage Greater Than or Equal to 75%
Weighted-Average Grant Date Fair Value per Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Payout Percentage				200.00%
Unvested restricted stock
Stock Option
Granted, shares				929,000
Number of Options
Non-vested balance at beginning of period				2,195,000
Granted, shares				929,000
Vested, shares				(461,000)
Forfeited, shares				(96,000)
Non-vested balance at end of period		2,567,000		2,567,000
Weighted-Average Grant Date Fair Value per Share
Non-vested, grant date fair value at beginning of period				$ 19.58
Granted, grant date fair value				21.26
Vested, grant date fair value				24.43
Forfeited, grant date fair value				21.96
Non-vested, grant date fair value at end of period		$ 22.60		$ 22.60
Unvested restricted stock \| Various Employees
Stock Option
Granted, shares				212,883
Grant date fair value				$ 3.9
Number of Options
Granted, shares				212,883
Unvested restricted stock \| Various Employees Non Employee Directors
Stock Option
Granted, shares		81,347
Grant date fair value		$ 1.5
Number of Options
Granted, shares		81,347
Unvested restricted stock \| Senior management employees
Stock Option
Granted, shares				317,554
Vesting period				3 years
Grant date fair value				$ 5.7
Number of Options
Granted, shares				317,554
Unvested restricted stock \| Minimum \| Various Employees
Stock Option
Vesting period				3 years
Unvested restricted stock \| Maximum \| Various Employees
Stock Option
Vesting period				4 years
Performance Based Restricted Stock Unit \| Senior management employees
Stock Option
Granted, shares				317,554
Vesting period				3 years
Grant date fair value				$ 8.7
Number of Options
Granted, shares				317,554
Vesting based on service (continued employment)
Stock Option
Vesting period						4 years
Vesting percentage	25.00%					50.00%
Vesting based on performance
Stock Option
Vesting period						1 year
Vesting percentage					50.00%