Capital Stock (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Schedule of changes in outstanding Common Stock

Changes in outstanding Common Stock were as follows:

(In thousands of shares)	2017	2016	2015
Outstanding, beginning of year	99,843	99,377	99,204
Shares issued for exercise of options	416	125	104
Shares issued for time vested restricted stock (net of forfeitures)	952	341	69
Shares issued for acquisition	3,361	—	—
Outstanding, end of year	104,572	99,843	99,377