Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Estimated Forfeiture Rate

No definition available.

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- Definition

The total fair value of options for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares in accordance with the terms of the arrangement.

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Stock Plan Offering Period

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No definition available.

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- Definition

Share-Based Payment Arrangement, Plan Modification, Incremental Award Ratio

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- Definition

Share-based Payment Arrangement, Price Target, Increase (Decrease)

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No definition available.

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- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind dividends declared for award under share-based payment arrangement.

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- Definition

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

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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.

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- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

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The cash inflow associated with the amount received from the stock plan during the period.

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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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- Definition

Discount rate from fair value on offering 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

Per share or unit weighted-average intrinsic value of award granted under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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.

+ References

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

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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- Definition

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

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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

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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

Number of options outstanding, including both vested and non-vested options.

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- Definition

Per share weighted-average price paid for shares purchased on open market for issuance under share-based payment arrangement.

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- Definition

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

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Stock Based Compensation - Narrative (Details)			1 Months Ended	12 Months Ended
Stock Based Compensation - Narrative (Details)	May 01, 2018	Feb. 02, 2018	May 31, 2001	Dec. 31, 2021 USD ($) factor $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)				440,574	475,601	518,341	707,777
Granted (in usd per share) \| $ / shares				$ 0	$ 0	$ 0
Exercised (in usd per share) \| $ / shares				41.63	23.11	32.39
Canceled (in usd per share) \| $ / shares				$ 0	$ 0	$ 0
Options exercisable (in shares)				168,614	175,601	163,741
Options exercisable (in usd per share) \| $ / shares				$ 67.62	$ 60.35	$ 45.94
Total intrinsic values of options exercised in period \| $				$ 5,800,000	$ 3,000,000	$ 10,400,000
Total fair value of options vested \| $				1,000,000	1,000,000	1,000,000
Exercise of stock options \| $				2,939,000	1,619,000	5,274,000
Tax benefit realized for the tax deductions from option exercises \| $				$ 1,900,000	$ 700,000	$ 2,400,000
Estimated forfeiture rates				12.40%	13.00%	13.90%
Issuance of common stock under employee stock purchase plan \| $				$ 9,231,000	$ 7,382,000	$ 4,512,000
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental award ratio \| factor				1.09
Terms of award				10 years
Award vesting periods				5 years
Unrecognized compensation cost related to non-vested awards granted \| $				$ 4,800,000
Weighted-average period to recognize compensation cost (in years)				4 years
Restricted Stock and Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock and restricted units granted (in shares)				246,251	129,786	117,566
Restricted Stock and Restricted Stock Unit \| Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting periods				1 year
Restricted Stock and Restricted Stock Unit \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting periods				8 years
Market-based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period to recognize compensation cost (in years)				3 years 6 months 3 days
Restricted stock and restricted units granted (in shares)				73,094	82,112	74,051
Weighted-average grant-date fair values of restricted stock awards granted (in usd per share) \| $ / shares				$ 94.40	$ 70.99	$ 69.99
Restricted Stock and Restricted Stock Unit, Market-based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit realized for the tax deductions from option exercises \| $				$ 9,500,000	$ 2,100,000	$ 2,400,000
Unrecognized compensation cost related to non-vested awards granted \| $				44,300,000
Total fair value of restricted stock and restricted stock units vested \| $				68,100,000	18,600,000	12,700,000
Share-based compensation, dividends paid \| $				$ 0	$ 0	$ 100,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number				360,743	209,784	20,874	41,231
Share-based payment arrangement, price target, increase (decrease) \| $ / shares				$ 21.41
Weighted-average period to recognize compensation cost (in years)				3 years 10 months 24 days
Restricted stock and restricted units granted (in shares)				319,345	210,630	3,844
Minimum \| Restricted Stock and Restricted Stock Unit \| Senior Staff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting periods				4 years
Maximum \| Restricted Stock and Restricted Stock Unit \| Senior Staff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting periods				5 years
2015 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum issuance of common stock (in shares)				4,200,000
Number of options outstanding (in shares)				435,135
Number of shares available for issuance (in shares)				1,709,569
2015 Stock Option Plan \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number				360,743
2015 Stock Option Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market value of common stock on the date of grant for incentive stock options				100.00%
Employee Stock Purchase Plan \| Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum issuance of common stock (in shares)				2,000,000
Market value of common stock on the date of grant for incentive stock options	85.00%	95.00%		85.00%
Number of shares available for issuance (in shares)				1,295,691
Estimated forfeiture rates				11.15%	11.15%	5.80%
Maximum earnings withheld by the employees				15.00%
Offering period for incentive stock options	6 months		3 months
Issuance of shares under Employee Stock Purchase Plan (in shares)				109,248	118,629	66,413
Employee Stock Purchase Plan \| Minimum \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price under the Purchase Plan (in usd per share) \| $ / shares				$ 72.92
Employee Stock Purchase Plan \| Maximum \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price under the Purchase Plan (in usd per share) \| $ / shares				$ 97.84
Two Thousand Seven Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum issuance of common stock (in shares)				4,500,000
Common stock exercise price				85.00%
Number of options outstanding (in shares)				5,439
Number of stocks outstanding (in shares)				0