Capital Stock (Tables)

12 Months Ended

Dec. 31, 2011

Capital Stock [Abstract]

Summary of Changes in outstanding Common Stock

	2011		2010		2009
	(In thousands of shares)
Outstanding, beginning of year		93,143		91,673		91,140
Shares issued upon exercise of options		671		677		18
Shares issued under employee stock purchase plan		—		—		32
Shares issued for grants of time vested restricted stock		684		773		229
Shares issued upon vesting of performance units		—		20		254
Outstanding, end of year		94,498		93,143		91,673