Name:	spw_CurrentPeriodOverWhichInvestmentLossesAreRecognizedDueToUpdatingOfCurrentAssetsValuationMethod
Namespace Prefix:	spw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the period for amortization of investment losses incurred during the 2008 plan year.

No definition available.

Name:	spw_MultiemployerPlanInvestmentLossesAmortizedPeriod
Namespace Prefix:	spw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the previously required period for amortization of investment losses incurred during the 2008 plan year.

No definition available.

Name:	spw_MultiemployerPlanLossAmortizedPeriodRequired
Namespace Prefix:	spw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The percentage of total employer contributions made to the plan that the entities contributions does not exceed.

No definition available.

Name:	spw_MultiemployerPlanPeriodContributionsMaximumPercentage
Namespace Prefix:	spw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the previous period to recognize investment losses incurred during the 2008 plan year due to the updating of the current asset valuation method.

No definition available.

Name:	spw_PreviousPeriodOverWhichInvestmentLossesAreRecognizedDueToUpdatingOfCurrentAssetsValuationMethod
Namespace Prefix:	spw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450691-114947

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 5

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450657-114947