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Financial Instruments and Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Financial assets carried at fair value: |  |  |
Forward currency contracts | $ 1,510 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure |  | $ 479 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
Total financial assets carried at fair value | 1,510 us-gaap_AssetsFairValueDisclosure |  | 479 us-gaap_AssetsFairValueDisclosure
Financial liabilities carried at fair value: |  |  |
Forward currency contracts | 579 us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure |  | 491 us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Fixed price commodity contracts |  |  | 69 sri_FixedPriceContractLiabilitiesFairValueDisclosure
Total financial liabilities carried at fair value | 579 us-gaap_LiabilitiesFairValueDisclosure |  | 560 us-gaap_LiabilitiesFairValueDisclosure
Fair Value, Inputs, Level 1 [Member] |  |  |
Financial assets carried at fair value: |  |  |
Interest rate swap contract |  | [1] |
Forward currency contracts |  | [1] |
Total financial assets carried at fair value |  | [1] |
Financial liabilities carried at fair value: |  |  |
Forward currency contracts |  | [1] |
Fixed price commodity contracts |  | [1] |
Total financial liabilities carried at fair value |  | [1] |
Fair Value, Inputs, Level 2 [Member] |  |  |
Financial assets carried at fair value: |  |  |
Interest rate swap contract |  | [2] |
Forward currency contracts | 1,510 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [2] |
Total financial assets carried at fair value | 1,510 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [2] |
Financial liabilities carried at fair value: |  |  |
Forward currency contracts | 579 us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [2] |
Fixed price commodity contracts |  | [2] |
Total financial liabilities carried at fair value | 579 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [2] |
Fair Value, Inputs, Level 3 [Member] |  |  |
Financial assets carried at fair value: |  |  |
Interest rate swap contract |  | [3] |
Forward currency contracts |  | [3] |
Total financial assets carried at fair value |  | [3] |
Financial liabilities carried at fair value: |  |  |
Forward currency contracts |  | [3] |
Fixed price commodity contracts |  | [3] |
Total financial liabilities carried at fair value |  | [3] |
[1] | Fair values estimated using Level 1 inputs, which consist of quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. The Company did not have any recurring fair value estimates using Level 1 inputs at March 31, 2015 or December 31, 2014.
[2] | Fair values estimated using Level 2 inputs, other than quoted prices, that are observable for the asset or liability, either directly or indirectly and include among other things, quoted prices for similar assets or liabilities in markets that are active or inactive as well as inputs other than quoted prices that are observable. For forward currency and fixed price commodity, inputs include foreign currency exchange rates and commodity indexes.
[3] | Fair values estimated using Level 3 inputs consist of significant unobservable inputs. The Company did not have any recurring fair value estimates using Level 3 inputs at March 31, 2015 or December 31, 2014

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps. + References No definition available. + Details
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- Definition Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into. + References No definition available. + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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