Basic and diluted EPS calculations are detailed as follows (in thousands, except per share data):

		Year Ended December 31, 2015
		Net Income		Weighted-Average Shares	Per Share
		(Numerator)		(Denominator)	Amount
Net income per basic common share		$	469,053	82,336	$	5.70
Effect of dilutive stock option, restricted
	stock and restricted stock unit securities		-	751		(0.05)
Net income per diluted common share		$	469,053	83,087	$	5.65

		Year Ended December 31, 2014
		Net Income		Weighted-Average Shares	Per Share
		(Numerator)		(Denominator)	Amount
Net income per basic common share		$	431,620	84,358	$	5.12
Effect of dilutive stock option, restricted
	stock and restricted stock unit securities		-	793		(0.05)
Net income per diluted common share		$	431,620	85,151	$	5.07

		Year Ended December 31, 2013
		Net Income		Weighted-Average Shares	Per Share
		(Numerator)		(Denominator)	Amount
Net income per basic common share		$	450,003	85,426	$	5.27
Effect of dilutive stock option, restricted
	stock and restricted stock unit securities		-	1,120		(0.07)
Net income per diluted common share		$	450,003	86,546	$	5.20

For the years ended December 31, 2015, 2014 and 2013, the Company had 1.2 million, 1.0 million and 1.1 million stock options that were antidilutive, respectively, due to having higher exercise prices than the Company's average stock price during the period. These securities were not included in the computation of diluted EPS. The effect of dilutive securities was calculated using the treasury stock method.