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Element us-gaap_BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets had a mix of decimals attribute values: -3 0. Element us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 had a mix of decimals attribute values: -3 0. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod had a mix of decimals attribute values: -3 0. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross had a mix of decimals attribute values: -3 -2. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber had a mix of decimals attribute values: -3 -2. Element us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised had a mix of decimals attribute values: -3 0. 'Monetary' elements on report '14110 - Disclosure - Other Accrued Expenses and Other Liabilities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14120 - Disclosure - Long-Term Debt and Revolving Credit Facility (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14151 - Disclosure - Income Taxes (Details 2)' had a mix of different decimal attribute values. 'Shares' elements on report '14160 - Disclosure - Stock Options (Details)' had a mix of different decimal attribute values. 'Shares' elements on report '14162 - Disclosure - Stock Options (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '14162 - Disclosure - Stock Options (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '34050 - Disclosure - Goodwill and Intangibles (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '34090 - Disclosure - Other Accrued Expenses and Other Liabilities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '34092 - Disclosure - Other Accrued Expenses and Other Liabilities (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '34100 - Disclosure - Long-Term Debt and Revolving Credit Facility (Details)' had a mix of different decimal attribute values. 'Shares' elements on report '34130 - Disclosure - Stock Options (Details)' had a mix of different decimal attribute values. 'Shares' elements on report '34132 - Disclosure - Stock Options (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '34132 - Disclosure - Stock Options (Details 3)' had a mix of different decimal attribute values. Process Flow-Through: 10010 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: 10015 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Process Flow-Through: 10020 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Process Flow-Through: 10030 - Statement - Consolidated Statements of Comprehensive Income (Loss) Process Flow-Through: 10035 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Process Flow-Through: 10050 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' Process Flow-Through: Removing column '12 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '12 Months Ended Dec. 31, 2010' Process Flow-Through: 30010 - Statement - Consolidated Balance Sheets Process Flow-Through: 30015 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 30020 - Statement - Consolidated Condensed Statements of Operations Process Flow-Through: 30030 - Statement - Consolidated Condensed Statements of Comprehensive Income (Loss) Process Flow-Through: 30035 - Statement - Consolidated Condensed Statements of Comprehensive Income (Loss) (Parenthetical) Process Flow-Through: Removing column '12 Months Ended Dec. 31, 2012' Process Flow-Through: 30040 - Statement - Consolidated Condensed Statements of Cash Flows sgs-20130619.xml sgs-20130619.xsd sgs-20130619_cal.xml sgs-20130619_def.xml sgs-20130619_lab.xml sgs-20130619_pre.xml true true