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Note 16 - Income Tax (Details) - Effective Income Tax Rate Reconciliation (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Effective Income Tax Rate Reconciliation [Abstract] |  |  |
Income tax expense using combined statutory rate of 26.5% (2013 - 26.5%, 2012 - 26.5%) | $ 32,117 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 18,233 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 16,463 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Permanent differences | 4,507 us-gaap_IncomeTaxReconciliationNondeductibleExpense | 4,125 us-gaap_IncomeTaxReconciliationNondeductibleExpense | 3,286 us-gaap_IncomeTaxReconciliationNondeductibleExpense
Tax effect of flow through entities | (1,005)us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense | (2,156)us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense | (3,663)us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense
Impairment and other charges | 669 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses |  | 676 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses
Impact of changes in foreign exchange rates | (1,172)fsrv_IncomeTaxReconciliationImpactOfChangesInForeignExchangeRates | (518)fsrv_IncomeTaxReconciliationImpactOfChangesInForeignExchangeRates | 1,546 fsrv_IncomeTaxReconciliationImpactOfChangesInForeignExchangeRates
Adjustments to tax liabilities for prior periods | 274 us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes | 925 us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes | 721 us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes
Effects of changes in enacted tax rates | 12 us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | 250 us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (14)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Changes in liability for unrecognized tax benefits | (5,015)us-gaap_IncomeTaxReconciliationTaxContingencies | 181 us-gaap_IncomeTaxReconciliationTaxContingencies | 352 us-gaap_IncomeTaxReconciliationTaxContingencies
Stock-based compensation | 1,779 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 2,201 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | (47)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Foreign, state and provincial tax rate differential | (1,312)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (3,726)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (714)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Impact of expired losses | 696 fsrv_IncomeTaxReconciliationImpactOfExpiredLosses |  |
Tax on preferred shares |  | 880 us-gaap_IncomeTaxReconciliationOtherAdjustments |
Other taxes | 1,735 fsrv_IncomeTaxReconciliationOtherTaxes | 1,906 fsrv_IncomeTaxReconciliationOtherTaxes | 94 fsrv_IncomeTaxReconciliationOtherTaxes
Change in valuation allowances | (1,486)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (97)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 2,033 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Provision for income taxes as reported | $ 31,799 us-gaap_IncomeTaxExpenseBenefit | $ 22,204 us-gaap_IncomeTaxExpenseBenefit | $ 20,733 us-gaap_IncomeTaxExpenseBenefit

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the impact of expired losses. + References No definition available. + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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