Weighted-Average Shares

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Weighted-Average Shares

Weighted-Average Shares

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended		Six-months Ended
	June 30, 2019	July 1, 2018	June 30, 2019	July 1, 2018
Basic weighted-average common shares outstanding	171,318	172,370	171,209	172,825
Effect of dilutive stock options	4,130	4,779	4,319	5,593
Weighted-average common and common-equivalent shares outstanding	175,448	177,149	175,528	178,418

Stock options to purchase 6,113,000 and 5,503,000 shares of common stock, on a weighted-average basis, were outstanding during the three-month and six-month periods ended June 30, 2019, respectively, and 2,959,000 and 2,032,000 for the same periods in 2018, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.