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Maximum amount which employees age 50 and over can contribute to the defined contribution plan.

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Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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The price per share of the conversion feature embedded in the debt instrument.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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Amount of cost for defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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Maximum amount the employee may contribute to a defined contribution plan.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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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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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Primarily represents commissions incurred in the period based upon the sale by commissioned employees or third parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by third parties (such as a distributor or value added reseller).

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2022	Aug. 30, 2020	Jan. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash equivalents maturities, months	3 months
Impairment charge	$ 0	$ 0	$ 0
Commission expense	130,466,000	100,219,000	92,468,000
Severance pay expense	8,810,000	9,649,000	7,656,000
Employee contribution amount, max per year	19,500	19,500	19
Employees over 50 years of age maximum annual contribution per year	$ 26,000	26,000	25
Employer matching contribution percentage	50.00%
Contribution expense	$ 9,366,000	8,893,000	8,068,000
Advertising expenses	31,575,000	14,134,000	16,040,000
Increase to retained earnings	1,653,963,000	1,454,388,000
Decrease to additional paid-in capital	(1,817,710,000)	(1,681,587,000)
Deferred tax liabilities	$ (7,429,000)	(32,109,000)
Subsequent Event \| Forecast \| Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to retained earnings				$ 8,750,000
Decrease to additional paid-in capital				28,816,000
Increase to long-term debt				24,757,000
Deferred tax liabilities				3,930,000
Increase in debt issuance costs				$ 761,000
2020 Subsidiary
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of non-controlling interest in subsidiary	20.00%
Consideration transferred for acquiring additional ownership	$ 14,000,000
2017 Exchangeable Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective conversion price effective (per ADS) (in usd per share)						$ 82.96
Increase to long-term debt	395,946,000	259,881,000
Increase in debt issuance costs	$ 5,791,000
2020 Exchangeable Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective conversion price effective (per ADS) (in usd per share)	$ 299.19				$ 299.19
Increase to long-term debt	$ 429,267,000	421,337,000
Increase in debt issuance costs					$ 7,952,000
Exchangeable Note Hedge \| 2017 Exchangeable Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anti-dilutive securities excluded in computation of diluted earnings per share (in shares)	3,457,475
Exchangeable Note Hedge \| 2020 Exchangeable Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anti-dilutive securities excluded in computation of diluted earnings per share (in shares)	1,537,504
Employee Stock Option
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	$ 4,754	$ 2,295	$ 4,921
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Employer matching contribution percentage	6.00%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Employer matching contribution percentage	8.00%