Note 2 - Summary of Accounting Policies (Detail) - Investments in Affiliated Companies - Income Statement Data (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equity in earnings of affiliated companies	$ 6,359	$ 3,471	$ 7,291
Investments In Affiliated Companies [Member]
Revenues	141,233	134,716	134,884
Gross profit	40,342	29,651	36,095
Net income	22,009	12,512	19,497
Equity in earnings of affiliated companies	$ 6,359	$ 3,471	$ 7,291

The amount of gross profit (loss) reported by an equity method investment of the entity.

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+ Details

- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

+ Details

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

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