Number of employees eligible for annual grand.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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
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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

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

+ References

No definition available.

+ Details

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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.

+ References

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

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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
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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock-based Compensation - Additional Information (Detail) $ in Millions		3 Months Ended			6 Months Ended
	Feb. 11, 2020 shares	Jun. 30, 2022 USD ($) Employee shares	Mar. 31, 2022	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Employee shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 XUA Employee shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation number of additional shares authorized (in shares)	4,850,000
Stock-based compensation number of shares authorized (in shares)		3,751,778			3,751,778		3,751,778
Annual grants to employees (in shares)					200,000
Unrecognized compensation cost related to unvested stock \| $		$ 6.6			$ 6.6
Balance			5 years 9 months 18 days		6 years 3 months 18 days
Restricted Stock Unit Award with Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that will vest					100.00%
Restricted Stock Unit Award with Market Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that will vest					100.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-qualified options granted expiration period					10 years
Vesting period					3 years
Allocated stock-based compensation expense \| $		$ 1.1		$ 1.0	$ 1.9	$ 2.2
Balance					2 years 2 months 12 days
Phantom Share Units (PSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that will vest		0.00%
Phantom Share Units (PSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that will vest		200.00%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense \| $		$ 6.9		$ 4.4	$ 11.2	$ 7.4
Unrecognized compensation cost related to unvested stock \| XUA							XUA 37,600,000
Unrecognized compensation cost related to unvested stock, expected weighted-average period of recognition					2 years 3 months 18 days
Ambition 2025 Strategic Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees eligible for annual grand \| Employee		115			115		115
Annual grants to employees (in shares)		400,000