Derivatives and Hedging Activities Derivatives and Hedging Activities - Netting Activities (Details Textuals) - USD ($) $ in Millions	Sep. 27, 2015	Dec. 28, 2014
Derivative, Netting Activities
Derivative Asset, Subject to Netting Arrangement, Net	$ 4.1	$ 2.8
Derivative Liability, Subject to Netting Arrangement, Net		$ 6.3

The potential effect of right of set-off and netting arrangement of derivative liability.

No definition available.

Name:	sndk_DerivativeLiabilitySubjecttoNettingArrangementNet
Namespace Prefix:	sndk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant