The number of days which stock purchased in the employee stock purchase plan must be held by the employee.

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- Definition

Number of performance periods for which market-based restricted stock will be measured for vesting purposes

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Potential Performance Award, Percentage

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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.

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- Definition

Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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-Publisher FASB
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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

Discount rate from fair value on purchase date that participants pay for shares.

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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.

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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

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

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

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Share-Based Compensation Plans - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) award shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized pre-tax compensation expense \| $	$ 28.0
Unrecognized compensation costs weighted-average period	1 year 9 months
Total fair value of equity awards \| $	$ 18.0	$ 22.0	$ 17.0
Unused shares (in shares)	1,500,000
Share-based compensation plan, vesting period	1 year
Shares authorized under stock option plans, exercise price range	10 years
Number of performance periods for market-based restricted stock \| award	3
Total intrinsic value of options exercised \| $	$ 3.0	5.0	5.0
Total cash received from employees under compensation arrangements \| $	17.0	21.0	18.0
Tax benefits generated from share-based employee compensation arrangements \| $	$ 0.3	0.2	$ 0.6
Time Vested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Market Based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Liability related to the cash awards \| $	$ 1.0	$ 1.0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Stock Option And Nonvested Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unused shares (in shares)	3,300,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unused shares (in shares)	600,000
Percentage of payroll deductions of eligible compensation	15.00%
Percentage of share purchased fair market value	85.00%
Employee stock purchase plan holding period	90 days
Share authorized (in shares)	5,500,000
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	98,000	79,000	45,000
ROC/COC Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Granted (in shares)	51,000
SRG, Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Granted (in shares)	51,000
Market Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance periods for market-based restricted stock \| award	3
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	150.00%
Maximum \| ROC/COC Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	200.00%
Maximum \| SRG, Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	200.00%
Maximum \| Market Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	150.00%
Year One \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.33%
Year One \| Market Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	1 year
Year Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.33%
Year Two \| Market Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	2 years
Year Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.33%
Year Three \| Market Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years