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Note 9 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014
Note 9 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3.2us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount	$ 2.1us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount	$ 1.9us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Minimum [Member]
Note 9 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	1 year
Maximum [Member]
Note 9 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	7 years
Other Noncurrent Liabilities [Member]
Note 9 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Liability, Classified, Noncurrent				$ 14.2us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember

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- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

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