Exercise price of the option.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Footnote 5

+ Details

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Namespace Prefix:	invest_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	sgc_Note13ShareBasedCompensationDetailsSummaryofInformationAboutStockAppreciationRightsOutstandingLineItems
Namespace Prefix:	sgc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

+ Details

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

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (e)(1)

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

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ 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 (c)(1)(iii)

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

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
SARS (in Shares)	557,029	614,917	671,500
Weighted Average Remaining Contractual Life (Years)	3 years 105 days
Weighted Average Exercise Price	$ 11.51
SARS 1
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 9.80
SARS (in Shares)	26,184
Weighted Average Remaining Contractual Life (Years)	1 year 29 days
Weighted Average Exercise Price	$ 9.80
SARS 2
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
SARS (in Shares)	200,222
Weighted Average Remaining Contractual Life (Years)	2 years 324 days
Weighted Average Exercise Price	$ 11.74
SARS 2 \| Minimum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 11.24
SARS 2 \| Maximum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 13.15
SARS 3
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
SARS (in Shares)	226,406
Weighted Average Remaining Contractual Life (Years)	2 years 248 days
Weighted Average Exercise Price	$ 11.52
SARS 3 \| Minimum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 9.80
SARS 3 \| Maximum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 13.15
Minimum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 7.63
Maximum [Member]
Note 13 - Share-Based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of Exercise Price	$ 16.00