Note 5 - Income Taxes (Details) - Reconciliation of Statutory Federal Income Tax Rate to Annual Tax Provision (Benefit) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Statutory Federal Income Tax Rate to Annual Tax Provision (Benefit) [Abstract]
Computed “statutory” benefit (provision)	$ 12,224	$ (8,342)	$ (81,600)
Computed “statutory” benefit (provision)	35.00%	35.00%	35.00%
Percentage depletion	3,946	5,575	13,751
Percentage depletion	11.00%	(24.00%)	(6.00%)
Change in valuation allowance other than utilization	(3,870)	(3,837)	(3,822)
Change in valuation allowance other than utilization	(11.00%)	16.00%	2.00%
State taxes, net of federal taxes	720	(1,110)	(10,890)
State taxes, net of federal taxes	2.00%	5.00%	5.00%
Transaction costs	(1,743)
Transaction costs	(5.00%)
Foreign currency translation of monetary assets	3,445
Foreign currency translation of monetary assets	10.00%
Rate differential on foreign earnings	(4,255)	(780)	(634)
Rate differential on foreign earnings	(12.00%)	3.00%
Other	(672)	(385)	1,217
Other	(2.00%)	2.00%	(1.00%)
	$ 9,795	$ (8,879)	$ (81,978)
	28.00%	37.00%	35.00%

Effective Income Tax Reconciliation Foreign Currency Translation Of Monetary Assets

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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