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Note 20 - Comprehensive Income (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Other Comprehensive Income (Loss), Net of Tax	$ 5,126	$ (3,010)
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion	1,364	14,550
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion	6,459	11,489
Amounts Reclassified From Net Settlements on Interest Rate Swaps Qualifying for Hedge Accounting to Depreciation	(31)	(51)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	51,189	$ 69,028
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 8,601

X

- Definition

This element represents the amounts reclassified from Net settlements on interest rate swaps qualifying for hedge accounting to Depreciation

+ References

No definition available.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

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- Definition

The effective portion of gains on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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