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Note 10 - Other Comprehensive Income ("OCI") - Components of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, tax	$ (4)	$ (38)
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, net of tax	11	$ 99
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, before tax	15
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Contract [Member]
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, net of tax	11
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Contract [Member] | Income Tax Expense [Member]
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, tax	$ (4)

X

- Definition

Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

+ References

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