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Note 16 - Income Tax (Details) - Deferred Income Tax Components (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred income tax assets |  |
Loss carry-forwards | $ 79,932 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 91,957 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Expenses not currently deductible | 33,240 us-gaap_DeferredTaxAssetsTaxDeferredExpense | 23,467 us-gaap_DeferredTaxAssetsTaxDeferredExpense
Stock-based compensation | 4,797 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 3,956 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Basis differences of partnerships and other entities | 17,442 us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries | 14,173 us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries
Allowance for doubtful accounts | 4,405 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts | 4,580 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Inventory and other reserves | 4,006 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | 2,554 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves
| 143,822 us-gaap_DeferredTaxAssetsGross | 140,687 us-gaap_DeferredTaxAssetsGross
| 129,262 us-gaap_DeferredTaxAssetsNet | 126,567 us-gaap_DeferredTaxAssetsNet
Deferred income tax liabilities |  |
Depreciation and amortization | 36,205 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 31,165 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Prepaid and other expenses deducted for tax purposes | 1,804 us-gaap_DeferredTaxLiabilitiesPrepaidExpenses | 1,427 us-gaap_DeferredTaxLiabilitiesPrepaidExpenses
| 38,009 us-gaap_DeferredIncomeTaxLiabilities | 32,592 us-gaap_DeferredIncomeTaxLiabilities
Net deferred income tax asset | 91,253 us-gaap_DeferredTaxAssetsLiabilitiesNet | 93,975 us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred Income Taxes [Member] |  |
Deferred income tax assets |  |
Less: valuation allowance | $ (14,560)us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_FairValueByAssetClassAxis = fsrv_DeferredIncomeTaxesMember | $ (14,120)us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_FairValueByAssetClassAxis = fsrv_DeferredIncomeTaxesMember

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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