Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic And Diluted

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,
	2017		2016		2017		2016
Numerators:
Numerator for both basic and diluted EPS, net income	$	88,535,947	$	86,485,242	$	186,092,688	$	166,765,236
Denominators:
Denominator for basic EPS, weighted-average shares outstanding	286,722,482		288,803,045		286,956,367		288,943,030
Potentially dilutive shares resulting from stock plans	3,120,420		2,660,838		3,581,875		2,429,695
Denominator for diluted EPS	289,842,902		291,463,883		290,538,242		291,372,725
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive	873,937		4,330,316		109,597		6,563,404