Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018, 2017 and 2016, are reflected in the following table (in thousands):

	Years Ended December 31,
	2018		2017		2016
Common stock repurchased (in shares)	5,614		4,046		4,046
Common stock repurchased	$	351,194	$	196,645	$	163,614

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, 2018, 2017 and 2016, are reflected in the following table (in thousands):

	Years Ended December 31,
	2018		2017		2016
Repurchases related to employee stock plans (in shares)	235		408		359
Repurchases related to employee stock plans	$	13,674	$	20,391	$	15,170

Cash Dividends Declared

The cash dividends declared during the years ended December 31, 2018, 2017 and 2016, are reflected in the following table:

	Years Ended December 31,
	2018		2017		2016
Cash dividends declared per share	$	1.12	$	.96	$	.88