Note 10 - Segment Disclosures - Reconciliation of Segment Operating Income or Loss to Consolidated Amounts (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Total segment operating income (loss)	$ 14,307	$ (277)
Interest expense, net	(2,768)	(2,957)
Other expense, net	54	(51)
Consolidated income (loss) before income taxes	$ 11,593	$ (3,285)

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of income (expense) related to nonoperating activities, classified as other.

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