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Note 11 - Derivative Financial Instruments (Details) - Fair Value of Derivative Instruments in Consolidated Balance Sheets (Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	$ 1,750us-gaap_InterestRateDerivativeLiabilitiesAtFairValue	$ 2,900us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	1,194us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_AccountsPayableAndAccruedLiabilitiesMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember	1,215us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_AccountsPayableAndAccruedLiabilitiesMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap contracts	$ 556us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember	$ 1,685us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember

X

- Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ 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=35750535&loc=d3e13433-108611

+ Details

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