Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Number and Cost of Common Stock Shares Repurchased

The number and the cost of common stock shares repurchased during the years ended December 31, 2020, 2019 and 2018, are reflected in the following table (in thousands): 

	Year Ended December 31,
	2020		2019		2018
Common stock repurchased (in shares)	2,505		4,253		5,614
Common stock repurchased	$	138,408	$	250,154	$	351,194

Number and Cost of Employee Stock Plan Repurchases

The number and the cost of employee stock plan repurchases made during the years ended December 31, 2020, 2019 and 2018, are reflected in the following table (in thousands):

	Year Ended December 31,
	2020		2019		2018
Repurchases related to employee stock plans (in shares)	366		352		235
Repurchases related to employee stock plans	$	17,399	$	22,491	$	13,674