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Note 4 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Basic and Diluted Earnings Per Share

		Three Months Ended September 30,								Nine Months Ended September 30,
		2012				2011				2012				2011
Numerator:
Numerator for basic and diluted earnings per share – Net income available to common shareholders		$	14,909,000			$	16,045,000			$	48,237,000			$	35,830,000
Denominator–
Denominator for basic earnings per share – weighted average shares outstanding			38,740,275				37,932,300				38,602,099				37,796,072
Effect of dilutive securities– Employee and director stock options and restricted share awards			861,913				1,026,598				1,030,779				1,159,396
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions			39,602,188				38,958,898				39,632,878				38,955,468
Basic earnings per common share		$	.38			$	.42			$	1.25			$	.95
Diluted earnings per common share and common share equivalents		$	.38			$	.41			$	1.22			$	.92

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Options to Purchase Shares of Common Stock

		Three Months Ended September 30,								Nine months Ended September 30,
		2012				2011				2012				2011
Anti-dilutive options			1,367,044				684,645				1,126,795				536,100

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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X

- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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