Name:	dw_BusinessAcquisitionCostOfAcquiredEntity
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of cash paid to acquire the entity.

No definition available.

Name:	dw_BusinessAcquisitionCostOfAcquiredEntityCashAmountPaid
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

No definition available.

Name:	dw_BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumed
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.

No definition available.

Name:	dw_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetOtherThanGoodwill
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of acquisition cost of a business combination allocated to net tangible assets

No definition available.

Name:	dw_BusinessAcquisitionPurchasePriceAllocationNetTangibleAsset
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Present value of future payments for purchase price

No definition available.

Name:	dw_PresentValueOfFuturePaymentsForPurchasePrice
Namespace Prefix:	dw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479