Number of Share-based Compensation Plans

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Target Award

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Share Based Compensation Arrangement By Share Based Payment Award Target Payout

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- Definition

Stock Option Exercisable Life

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Number of common shares reserved for future issuance related to deferred compensation arrangements with individuals.

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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 payable within one year (or the operating cycle, if longer).

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-Name Accounting Standards Codification
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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable after one year (or the operating cycle, if longer).

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No definition available.

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- Definition

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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Unrecognized cost of unvested share-based compensation awards.

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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 cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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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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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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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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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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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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Share-Based Compensation - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) share-based_compensation_plan shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans \| share-based_compensation_plan	2
Number of shares authorized (in shares) \| shares	15,600,000.0
Number of shares available for future issuance (in shares) \| shares	4,300,000
Proceeds from stock option exercises	$ 27,639	$ 22,935	$ 30,240
Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares) \| shares				174,994
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option exercisable life	10 years
Total intrinsic value of options exercised	$ 38,000	26,100	26,500
Proceeds from stock option exercises	27,600	22,900	30,200
Tax benefit realized for the tax deductions from stock options exercised	8,000	9,500	$ 9,600
Total unrecognized compensation cost	$ 13,700
Weighted-average period of total unrecognized compensation cost, in years	1 year 3 months 18 days
Stock Option \| Non-Employee Directors Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Total unrecognized compensation cost	$ 5,500
Weighted-average period of total unrecognized compensation cost, in years	1 year 1 month 6 days
Unvested shares, granted (in shares) \| shares	46,460
Cash-settled Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Share based compensation, accrued expenses	$ 4,500	4,500
Share based compensation, other noncurrent liabilities	$ 2,400	$ 3,000
Unvested shares, granted (in shares) \| shares	30,795
Performance Shares Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	$ 8,200
Weighted-average period of total unrecognized compensation cost, in years	1 year
Award requisite service period	3 years
Unvested shares, granted (in shares) \| shares	52,375	100,000	100,000
Performance Shares Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target award	0.00%
Performance Shares Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target award	250.00%
Target payout	100.00%