Common Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Weighted Average Number of Common Shares Used In the Computation of Basic and Diluted Earnings per Share

The weighted average number of shares used in the computation of net income per share was as follows:

(In thousands)	2019	2018	2017
Basic	190,722	190,048	187,265
Diluted	193,521	192,395	193,527

Schedule of Changes in Shares of Common Stock Outstanding

Changes in shares of common stock outstanding, net of treasury shares, are presented below. Shares of common stock issued and outstanding do not include shares related to unissued restricted stock units (including shares held in the grantor trust).

	2019		2018		2017
Balance, beginning of year	182,993,640		182,272,278		181,790,399
Shares issued	687,339		1,257,762		1,578,384
Shares repurchased	(269,072	)	(536,400	)	(1,096,505)
Balance, end of year	183,411,907		182,993,640		182,272,278