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Note 7 - Net Income Per Share (Details) - Calculation of Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Calculation of Earnings Per Share [Abstract]
Net income (in Dollars)	$ 6,255	$ 4,731
Denominator:
Basic weighted-average shares outstanding	30,477	29,353
Effect of dilutive options and restricted stock	1,488	1,462
Diluted weighted average shares outstanding	31,965	30,815
Net income per share - Basic (in Dollars per share)	$ 0.21	$ 0.16
Net income per share - Diluted (in Dollars per share)	$ 0.20	$ 0.15

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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