Equity (Schedule of Share Activity) (Details)	6 Months Ended
	Jun. 30, 2014
Rollforward of Share Activity:
Common shares outstanding, beginning balance	77,258,000
Treasury shares, beginning balance	9,467,286
Shares issued:
Stock option exercises	210,900
Restricted share awards	145,560
Common shares outstanding, ending balance	81,773,000
Treasury shares, ending balance	5,262,831
Other Share Activity [Member]
Shares issued:
Other shares issued, net of shares withheld for taxes	(46,000)
4.0% Convertible Notes [Member]
Shares issued:
Convertible notes, common shares	4,204,000
Convertible notes, treasury shares	(4,204,000)