Weighted Average Shares (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Calculation of Weighted Average Shares

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

	Year Ended December 31,
	2019	2018	2017
Basic weighted-average common shares outstanding	171,194	172,333	173,287
Effect of dilutive stock awards	4,075	5,073	6,264
Diluted weighted-average common and common-equivalent shares outstanding	175,269	177,406	179,551