Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details) - Future Obligations Under Non-Cancelable Operating Leases (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Future Obligations Under Non-Cancelable Operating Leases [Abstract]
2014	$ 3,347
2015	1,353
2016	1,370
2017	985
2018	917
Thereafter	2,659
Total	$ 10,631

Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details) - Future Obligations Under Non-Cancelable Operating Leases (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2013

Future Obligations Under Non-Cancelable Operating Leases [Abstract]

$ 3,347

1,353

1,370

985

917

2,659

$ 10,631

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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