Note 2 - Summary of Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance - foreign currency translation	$ (6,625)	$ 3,356
Balance - net investment hedge - Australian denominated debt	(5,937)	3,183
Total activity during year - foreign currency translation	(11,401)	(9,981)
Total activity during year - net investment hedge - Australian denominated debt	(8,439)	(9,120)	4,612
Change during 2013:
Before-tax amount - foreign currency translation	(16,923)	(14,706)
Before-tax amount - net investment hedge - Australian denominated debt	(12,023)	(13,281)
Tax (expense) benefit - foreign currency translation	5,522	4,725
Tax (expense) benefit - net investment hedge - Australian denominated debt	3,584us-gaap_OtherComprehensiveIncomeLossTax	4,161us-gaap_OtherComprehensiveIncomeLossTax
Balance - foreign currency translation	(18,026)	(6,625)	3,356
Balance - net investment hedge - Australian denominated debt	(14,376)	(5,937)	3,183
Investment Hedge Foreign Exchange Contract [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance - net investment hedge - foreign exchange contract	483
Total activity during year - net investment hedge - foreign exchange contract	2,962	483
Change during 2013:
Before-tax amount - net investment hedge - foreign exchange contract	4,900	799
Tax (expense) benefit - net investment hedge - foreign exchange contract	(1,938)	(316)
Balance - net investment hedge - foreign exchange contract	3,445	483
Investment Hedge Australian Denominated Debt [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance - net investment hedge - foreign exchange contract		(173)
Total activity during year - net investment hedge - foreign exchange contract		378
Change during 2013:
Before-tax amount - net investment hedge - foreign exchange contract		626
Tax (expense) benefit - net investment hedge - foreign exchange contract		(248)
Balance - net investment hedge - foreign exchange contract	$ 205	$ 205

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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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Amount before tax, after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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