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Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

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Period Type:	duration

Financing Obligation, Construction, Lessor, Committed Additional Fundings

No definition available.

Name:	wk_FinancingObligationConstructionLessorCommittedAdditionalFundings
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Financing Obligation, Construction, Lessor, Committed Initial Fundings

No definition available.

Name:	wk_FinancingObligationConstructionLessorCommittedInitialFundings
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Financing Obligation, Construction, Number Of Phases

No definition available.

Name:	wk_FinancingObligationConstructionNumberOfPhases
Namespace Prefix:	wk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Financing Obligation, Purchase Option Period

No definition available.

Name:	wk_FinancingObligationPurchaseOptionPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
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Transfer to Capital Lease Obligation

No definition available.