Number of Participants with Compensation Expense Recognized on a Rolling Twelve-Month Basis

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Achievement Condition, Percent, Participant One

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Achievement Condition, Percent, Participant Two

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- Definition

The total fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans.

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Ratio Shares Granted per Unit

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting, Criteria One

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting, Criteria Three

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting, Criteria Two

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Doubled

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Share Rights

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- Definition

Share-based Compensation Arrangement by Share-based Payment, Installments

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No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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- Definition

Amount of cost capitalized for award under share-based payment arrangement.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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.

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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).

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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.

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No definition available.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Topic 718
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- Definition

Price of a single share of a number of saleable stocks of a company.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions		2 Months Ended	3 Months Ended		9 Months Ended
	Feb. 18, 2021 USD ($) $ / shares	Feb. 28, 2021 USD ($) installment participant shares	Sep. 30, 2021 USD ($) compensation_plan shares	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) compensation_plan shares	Sep. 30, 2020 USD ($)	Jan. 29, 2021 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based incentive compensation plans \| compensation_plan			1		1
Effective registration shares (in shares) \| shares			10,700,000		10,700,000
Number of shares available for grant (in shares) \| shares			1,400,000		1,400,000
Share-based compensation expense			$ 11.5	$ 7.8	$ 32.3	$ 30.0
Share-based compensation expense capitalized			2.4	$ 1.8	5.8	$ 5.7
Share-based compensation not yet recognized			$ 33.5		$ 33.5
Share-based compensation not yet recognized period of recognition					1 year 4 months 24 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) \| shares		332,707
Market Measure-Based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) \| shares		172,430
Time-Based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) \| shares		160,277
2021 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Vesting, achievement of pre-set FFO per share goals, percentage of RSUs		100.00%
Vesting, Average debt to EBIDTA ratio, percentage of RSUs		50.00%
Vesting, Market measure, percentage of RSUs		50.00%
Number of shares issuable per RSU		1
Share price (in dollars per share) \| $ / shares	$ 57.85
Fair value per share on valuation date (in dollars per share) \| $ / shares	$ 63.93
Remaining expected life, including future volatility		2 years 10 months 24 days
Performance period		2 years 10 months 24 days
Fair value RSUs granted	$ 10.6
Share-based compensation expense					$ 5.5
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Number of participants with compensation expense recognized on a rolling twelve-month basis \| participant		1
Number of installments \| installment		3
Right to receive number of shares (in shares) \| shares		1
Time-Based Restricted Stock Units (RSUs), Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share) \| $ / shares	$ 57.85						$ 56.63
Fair value RSUs granted		$ 9.1
2020 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based RSU, achievement target, all other participants, percent			150.00%		150.00%
Performance-based RSU, achievement target, one participant, percent			175.00%		175.00%
Accelerated Compensation Related to Severance Packages [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 0.2		$ 4.5