Business Acquisition, Remaining Restricted Equity Issued, Number of Shares

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- Definition

Common Stock, Capital Shares Reserved for Future Issuance, Annual Percentage Increase

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Conversion Right of Units, Shares

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Typical Award Vesting Rights, Percentage

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- Definition

Share-based Compensation, Volume Weighted Average Trading Price of Stock, Number of Trading Days Used in Calculation

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

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-Publisher FASB
-Name Accounting Standards Codification
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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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- 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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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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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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Percentage of vesting of award under share-based payment arrangement.

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Shareholders' Equity - Stock-Based Compensation Additional Information (Details) - USD ($) $ in Thousands				12 Months Ended
	Oct. 17, 2019	May 30, 2018	May 27, 2015	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of stock options exercised				$ 833,556	$ 409,029
Remaining unamortized compensation cost related to unvested stock options and RSUs				$ 306,355	$ 227,523
Remaining unamortized compensation cost related to unvested stock options and RSUs, period of recognition				2 years 10 days
Restricted share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted (in shares)				888,991	1,127,094
Stock Option Plan \| Class A Subordinate Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Trading days used to calculate volume weighted average trading price			5 days
Stock Option Plan \| Employee and Non-Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Remaining vesting period		24 months	36 months
Stock Option Plan \| Employee and Non-Employee Stock Options \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)		33.33333%	25.00%
Stock Option Plan \| Employee and Non-Employee Stock Options \| Second Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)		33.33333%
Stock Option Plan \| Employee and Non-Employee Stock Options \| Third Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)		33.33333%
Legacy Option Plan \| Class B Multiple Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares receivable per option exercised (in shares)			1
Legacy Option Plan \| Employee and Non-Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Remaining vesting period			36 months
Legacy Option Plan \| Employee and Non-Employee Stock Options \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Legacy Option Plan \| Employee and Non-Employee Stock Options \| Second Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Legacy Option Plan \| Employee and Non-Employee Stock Options \| Third Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Legacy Option Plan \| Employee and Non-Employee Stock Options \| Fourth Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
LTIP \| Class A Subordinate Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares receivable per option exercised (in shares)		1
LTIP \| Employee and Non-Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining vesting period		24 months
LTIP \| Restricted share units \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU Vesting (as a percent)		33.33%
LTIP \| Restricted share units \| Second Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU Vesting (as a percent)		33.33%
LTIP \| Restricted share units \| Third Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU Vesting (as a percent)		33.33%
LTIP \| Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted (in shares)				0
LTIP \| Deferred Shares Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted (in shares)				673
Prior to November 2017 RSUs \| Employee and Non-Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining vesting period			36 months
Prior to November 2017 RSUs \| Restricted share units \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Prior to November 2017 RSUs \| Restricted share units \| Second Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Prior to November 2017 RSUs \| Restricted share units \| Third Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Prior to November 2017 RSUs \| Restricted share units \| Fourth Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting amount (as a percent)			25.00%
Stock Option Plan and LTIP \| Class A Subordinate Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)			3,743,692
Shares available for issuance, percentage of annual increase			5.00%
Subsequent Event \| Stock Option Plan and LTIP \| Class A Subordinate Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)						19,817,622
6 River Systems, Inc. \| Class A Subordinate Voting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued with trading restrictions	122,080
Restricted shares remaining				122,080