Share-Based Compensation-Activity (Details Textuals 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Dec. 30, 2012
Compensation and Benefits
Share-based compensation expense capitalized in inventory	$ 2.4	$ 1.8
Employee Stock Option [Member]
Compensation and Benefits
Total unrecognized compensation cost, net of forfeitures, related to awards granted to employees	70.9
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition	2 years 7 months
Restricted Stock Units (RSUs) [Member]
Compensation and Benefits
Total unrecognized compensation cost, net of forfeitures, related to awards granted to employees	151.9
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition	3 years 2 months
Employee Stock Purchase Plan Shares [Member]
Compensation and Benefits
Total unrecognized compensation expense for ESPP	$ 2.8
Employee service, Nonvested awards, Total Compensation Cost not yet Recognized, Period for Recognition	0 years 5 months

Name:	sndk_CompensationAndBenefitsTextualsAbstract
Namespace Prefix:	sndk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

As of the latest balance-sheet date presented, the total unrecognized compensation cost related to employee stock purchase plan (will be charged against earnings through the end of the plan period).

+ References

No definition available.

+ Details

Name:	sndk_EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnEmployeeStockPurchasePlan
Namespace Prefix:	sndk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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

- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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