Earnings Per Share

12 Months Ended

Dec. 31, 2015

A reconciliation between basic and diluted earnings per share is as follows (in thousands, except per share data):



	Year Ended December 31,
	2015		2014		2013
Net income for basic and diluted earnings per share	$	665,783	$	764,146	$	473,692
Weighted-average common shares outstanding	219,537		221,658		219,638
Dilutive effect of stock options, performance share awards and restricted stock awards	1,152		1,386		1,303
Diluted weighted-average shares outstanding	220,689		223,044		220,941
Basic earnings per share:
Net income	$	3.03	$	3.45	$	2.16
Diluted earnings per share:
Net income	$	3.02	$	3.43	$	2.14

Diluted earnings per share did not reflect options to purchase an aggregate of 1.9 million shares for the year ended December 31, 2013 because the effect of including them would have been antidilutive. There were no antidilutive shares for the year ended December 31, 2015 and December 31, 2014.