XML 92 R80.htm IDEA: XBRL DOCUMENT v3.21.2

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 4,707	$ 2,227	$ 8,221	$ 4,014
Unrecognized compensation expense for options	$ 500		$ 500
2020 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares which may be granted under plan (in shares)	6,488,988		6,488,988
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 100	300	$ 300	500
Unrecognized compensation expense for awards	1,100		$ 1,100
Unrecognized compensation expense, period for recognition			1 year
Time-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	2,400	1,200	$ 4,300	2,200
Unrecognized compensation expense for awards	17,400		$ 17,400
Unrecognized compensation expense, period for recognition			2 years 7 months 6 days
Modification of awards	3,500		$ 4,800
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	2,000	600	3,100	900
Unrecognized compensation expense for awards	16,300		$ 16,300
Unrecognized compensation expense, period for recognition			1 year 10 months 24 days
Modification of awards	$ 800		$ 1,000
Performance-Based Restricted Stock Units | Awards Granted 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR payout percentage, minimum	0.00%		0.00%
TSR payout percentage, maximum	200.00%		200.00%
TSR payout percentage, target	100.00%		100.00%
TSR, target	50.00%		50.00%
TSR, minimum	25.00%		25.00%
TSR, maximum	85.00%		85.00%
Performance-Based Restricted Stock Units | Awards Granted in 2020 and Prior
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR payout percentage, minimum	0.00%		0.00%
TSR payout percentage, maximum	150.00%		150.00%
TSR payout percentage, target	100.00%		100.00%
TSR, target	50.00%		50.00%
TSR, minimum	25.00%		25.00%
TSR, maximum	75.00%		75.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 200	$ 200	$ 400	$ 400
Unrecognized compensation expense, period for recognition			8 months 12 days

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Payout Percentage, Maximum

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnPayoutPercentageMaximum
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Payout Percentage, Minimum

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnPayoutPercentageMinimum
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Payout Percentage, Target

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnPayoutPercentageTarget
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Threshold Percentage, Maximum

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnThresholdPercentageMaximum
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Threshold Percentage, Minimum

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnThresholdPercentageMinimum
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Total Shareholder Return Threshold Percentage, Target

+ References

No definition available.

+ Details

Name:	wsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardTotalShareholderReturnThresholdPercentageTarget
Namespace Prefix:	wsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_PlanNameAxis=wsc_TwentyTwentyIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=wsc_TimeBasedRestrictedStockUnitsRSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=wsc_PerformanceBasedRestrictedStockUnitsRSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=wsc_AwardsGranted2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=wsc_AwardsGrantedIn2020AndPriorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: