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DERIVATIVE FINANCIAL INSTRUMENTS - Summary of Interest Rate Swap Components (Details) - Interest rate swaps	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average pay rate	0.77%	0.00%
Weighted average receive rate	0.09%	0.00%
Weighted average maturity in years	4 years 2 months 12 days	0 years

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- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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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.

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No definition available.

+ Details

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- Definition

Derivative Weighted Average Pay Rate

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No definition available.

+ Details

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Namespace Prefix:	wk_
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Balance Type:	na
Period Type:	instant

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- Definition

Derivative Weighted Average Rate Received

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No definition available.

+ Details

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- Details

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