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Note 13 - Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 13 - Income Taxes (Details) [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 4,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	$ 4,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Income Taxes Paid, Net	4,700,000us-gaap_IncomeTaxesPaidNet	7,600,000us-gaap_IncomeTaxesPaidNet	6,900,000us-gaap_IncomeTaxesPaidNet
Interest Rate Swap [Member]
Note 13 - Income Taxes (Details) [Line Items]
Increase (Decrease) in Deferred Income Taxes	$ 125,000us-gaap_IncreaseDecreaseInDeferredIncomeTaxes / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Minimum [Member]
Note 13 - Income Taxes (Details) [Line Items]
Tax Credit Carryforward Expiration	7 years
Maximum [Member]
Note 13 - Income Taxes (Details) [Line Items]
Tax Credit Carryforward Expiration	20 years

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

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- Definition

The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

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- Definition

Amount of interest expense accrued for an underpayment of 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 15

-Subparagraph (c)

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- Definition

The expiration of state net operating loss carryforwards.

+ References

No definition available.

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