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Note 4 - Earnings Per Share - Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator for basic and diluted earnings per share – Net income available to common shareholders	$ 14,479	$ 2,395
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	39,409	40,553
Effect of dilutive securities– Employee stock options and restricted stock awards (in shares)	1,292	496
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions (in shares)	40,701	41,049
Basic earnings per common share (in dollars per share)	$ 0.37	$ 0.06
Diluted earnings per common share and common share equivalents (in dollars per share)	$ 0.36	$ 0.06

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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