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Note 11 - Shares Outstanding and Earnings Per Share (Detail) - Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Weighted average basic shares outstanding	11,034	10,988
Assumed exercise of stock options and issuance of stock awards	8	9
Weighted average diluted shares outstanding	11,042	10,997
Net income (in Dollars)	$ 5,163	$ 6,230
Basic earnings per share (in Dollars per share)	$ 0.47	$ 0.57
Diluted earnings per share (in Dollars per share)	$ 0.47	$ 0.57
Anti-dilutive securities outstanding	201	225

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