Share-based Compensation Arrangement by Share-based Payment Award, Number of Performance Criteria

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Publisher FASB
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- References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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).

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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

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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

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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

Percentage of vesting of share-based compensation awards.

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Share-based compensation - Narrative (Details) $ in Millions				3 Months Ended		6 Months Ended
	Jan. 02, 2018 criteria shares	May 26, 2017 criteria shares	May 16, 2017 shares	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares authorized for issuance (in shares)				4,000,000		4,000,000
Shares available for future grants under the 2017 Plan (in shares)				1,317,396		1,317,396
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares approved for issuance (in shares)						486,884
Fair value of vested awards \| $				$ 1.4	$ 0.5	$ 1.9	$ 0.5
Unrecognized compensation cost \| $				13.2	13.9	$ 13.2	$ 13.9
Period over which unrecognized compensation expense will be recorded						3 years 1 month 2 days	4 years 3 months 18 days
Compensation expense (less than $0.1 million for 2017 performance share awards) \| $				1.2	0.9	$ 2.8	$ 0.9
Restricted Share Awards \| Employees and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares approved for issuance (in shares)	438,185	410,096	994,115
Vesting period	3 years	3 years	5 years
Restricted Share Awards \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares approved for issuance (in shares)	48,699	51,569
Restricted Share Awards \| Vesting on the 3rd Anniversary of the Award \| Employees and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Restricted Share Awards \| Vesting on the 4th Anniversary of the Award \| Employees and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Restricted Share Awards \| Vesting on the 5th Anniversary of the Award \| Employees and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			50.00%
Performance Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares approved for issuance (in shares)	273,729	265,222
Unrecognized compensation cost \| $				3.2	2.1	$ 3.2	$ 2.1
Period over which unrecognized compensation expense will be recorded						2 years 1 month 13 days	2 years 10 months 28 days
Compensation expense (less than $0.1 million for 2017 performance share awards) \| $				$ 1.0	$ 0.1	$ 1.1	$ 0.1
Number of performance criteria defined in award agreements \| criteria	2	2
Performance Share Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%	0.00%
Performance Share Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	150.00%	150.00%