Share based compensation arrangement by share based payment award equity instruments other than options target.

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options target threshold.

+ References

No definition available.

+ Details

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- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

+ References

No definition available.

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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

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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

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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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-Publisher FASB
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-SubTopic 10
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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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- Definition

Description of terms of award under share-based payment arrangement.

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-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

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

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- Definition

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Stock-Based Compensation Plans and Employee Benefits - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Share-based payments award, number of shares available for grant	2,700,000	2,700,000
Weighted average grant date fair value	$ 2.07
Restricted common shares		100,000
Common shares, shares issued	193,995,499	193,995,499	193,823,409
Black-Scholes Option Pricing Model [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, shares granted					0
Stock options [Member]
Class Of Stock [Line Items]
Contractual term of stock options, Maximum		10 years
RSUs [Member]
Class Of Stock [Line Items]
Restricted common shares		500,000	300,000	300,000
Restricted Stock [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, shares granted		490,000
Restricted common shares			100,000	100,000
Weighted-average fair value of the restricted stock		$ 9.05
Total unrecognized compensation cost granted	$ 10.0	$ 10.0
Term of recognition of unrecognized stock option compensation cost		1 year 7 months 6 days
Restricted Stock [Member] \| Minimum [Member]
Class Of Stock [Line Items]
Vesting period		3 years
Weighted-average fair value of the restricted stock		$ 7.87
Restricted Stock [Member] \| Maximum [Member]
Class Of Stock [Line Items]
Vesting period		4 years
Weighted-average fair value of the restricted stock		$ 26.76
Performance-Based Restricted Share Units (PRSUs) [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, shares granted		0	0	0
Performance-based restricted share units, description		In 2020, 2019 and 2018, the Board of Directors approved grants to the chief executive officer and the former chief operating officer of PRSUs covering a “target” number of shares, subject to three-year performance periods beginning on March 31, 2020, March 1, 2019 and March 1, 2018, and ending on February 28, 2023, February 28, 2022 and February 28, 2021, respectively. In addition, in 2020 the Board of Directors approved grants to the chief financial officer covering a “target” number of shares, subject to one-year, two-year and three-year performance periods beginning on March 1, 2020. In 2017, the Board of Directors approved grants to the chief executive officer and the former chief operating officer of PRSUs covering a “target” number of shares, subject to one-year, two-year and three-year performance periods beginning on March 1, 2017.
Performance-based restricted share units, fair value equity and liability awards		$ 4.5	$ 5.6	$ 4.7
Common shares, shares issued	257,168	257,168
Share based compensation arrangement by share based payment award, mark to market adjustment		$ (0.7)	$ 1.9
Performance-Based Restricted Share Units (PRSUs) [Member] \| Minimum [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, target		0.00%
Performance-Based Restricted Share Units (PRSUs) [Member] \| Maximum [Member]
Class Of Stock [Line Items]
Share-based compensation arrangement by share-based payment award, target threshold		200.00%