Share-based Compensation Arrangement by Share-based Payment Award, Exercisable Period After Termination

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- Definition

Share-based compensation arrangement by share-based payment award, maximum number of shares per employee value

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- Definition

Share-based compensation arrangement by share-based payment award, maximum shares authorized for purchase by employees

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- Definition

Share-based compensation arrangement by share-based payment award, numerator in fixing the shares authorized for purchase

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- Definition

Share-Based Compensation Arrangement By Share Based Payment Award, Options Pre-Vesting Forfeitures Estimated

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- Definition

Share-based compensation arrangement by share-based payment award, period of terms

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Exercisable Period After Termination in Case of Death or Disability

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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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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Amount of cash inflow from issuance of shares under share-based payment arrangement. Excludes option exercised.

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

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Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

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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

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).

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

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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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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

Gross number of share options (or share units) granted during the period.

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- Definition

Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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- Definition

Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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

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Share-Based Compensation - Narrative (Details) - USD ($)			12 Months Ended
	May 15, 2012	Feb. 17, 2000	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 17, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Intrinsic value of stock options exercised			$ 3,900,000
Cash received from exercise of stock options			1,700,000	$ 5,700,000	$ 18,000,000.0
Proceeds for the issuance of common stock under the ESPP			$ 26,200,000	$ 25,000,000.0	$ 23,600,000
Employee stock options granted in period			0	0	0
Period after termination in which options can be exercised (in days)	90 days
Period after termination in which options can be exercised in case of death or disability (in years)	1 year
Number of options vested and expected to vest (in shares)				300,000
Weighted average exercise price of options vested and expected to vest (in dollars per share)			$ 8.19	$ 6.41
Stock option exercises (in shares)			300,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price			$ 6.37
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value			$ 200,000
Share-based compensation expense			$ 79,400,000	$ 78,300,000	$ 69,800,000
Amended And Restated Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance under the plan (in shares)	33,000,000.0					27,900,000
Common stock reserved and available for grant (in shares)						87,000,000.0
Aggregate of common stock available for grant (in shares)			25,500,000
Amended And Restated Stock Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Term of grant agreement (in years)	7 years
Amended And Restated Stock Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	4 years
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from exercise of stock options			$ 1,700,000
Proceeds for the issuance of common stock under the ESPP			26,200,000
Time Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense on non-vested stock awards			74,900,000
Compensation expense recognized on restricted stock units			$ 48,400,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognition period for compensation expense (in years)			1 year 3 months 18 days
Aggregate of common stock available for grant (in shares)			4,800,000
Restricted Stock \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted in period (in shares)			100,000
Weighted average grant date fair value (In dollars per share)			$ 18.08
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate of common stock available for grant (in shares)						28,500,000
Share-based compensation expense			$ 7,800,000
Maximum employee subscription rate for the ESPP (as a percent)		10.00%
Discount rate from market value paid by participants for shares under the plan (as a percent)		85.00%
Maximum annual amount of purchases per employee under the plan		$ 25,000
Shares authorized for purchase per employee per quarter (in shares)		500
Maximum fair value of shares employee may purchase in a quarter		$ 6,250
Shares issued pursuant to the employee stock purchase plan (in shares)			1,700,000	1,500,000	1,900,000
Employee Stock Purchase Plan \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 1,800,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense on non-vested stock awards			$ 60,900,000
Pre-vesting forfeitures (as a percent)			5.00%	5.00%	5.00%
Equity awards granted in period (in shares)			5,400,000
Compensation expense recognized on restricted stock units			$ 69,800,000
Weighted average grant date fair value (In dollars per share)			$ 21.64
Restricted Stock Units \| Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards granted in period (in shares)			2,600,000
Restricted Stock Units \| Amended And Restated Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense on non-vested stock awards			$ 10,100,000
Market Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense on non-vested stock awards			$ 3,900,000
Option price above closing price of common stock at end of quarter
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit			$ 24.38