Earnings Per Share

6 Months Ended

Jun. 30, 2013

The following table reconciles the numerators and denominators used in the calculation of basic and diluted earnings per share (EPS):



	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Numerators:
Numerator for both basic and diluted EPS, net income	$	52,097,397	$	40,766,539	$	97,527,964	$	87,111,123
Denominators:
Denominator for basic EPS, weighted-average shares outstanding	143,240,333		143,722,329		142,888,337		143,610,898
Potentially dilutive shares resulting from stock plans	770,292		1,019,028		649,655		1,243,334
Denominator for diluted EPS	144,010,625		144,741,357		143,537,992		144,854,232

Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive	3,270,342		3,513,682		3,454,067		2,906,932

The entire disclosure for earnings per share.