Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

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, 2017, 2016 and 2015, are reflected in the following table (in thousands):

	Years Ended December 31,
	2017		2016		2015
Common stock repurchased (in shares)	4,046		4,046		4,343
Common stock repurchased	$	196,645	$	163,614	$	228,166

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, 2017, 2016 and 2015, are reflected in the following table (in thousands):

	Years Ended December 31,
	2017		2016		2015
Repurchases related to employee stock plans (in shares)	408		359		474
Repurchases related to employee stock plans	$	20,391	$	15,170	$	24,755

Cash Dividends Declared

The cash dividends declared during the years ended December 31, 2017, 2016 and 2015, are reflected in the following table:

	Years Ended December 31,
	2017		2016		2015
Cash dividends declared per share	$	.96	$	.88	$	.80