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

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Represents the income tax reconciliation, impact of changes in foreign exchange rates.

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Represents the income tax reconciliation, other taxes.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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 the valuation allowance for deferred tax assets.

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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.

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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.

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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 revisions of previously reported income tax expense (benefit).

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