Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Trade receivables allowances	$ 8,844	$ 9,293
Common stock, par value	$ 0.125	$ 0.125
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	115,761,840	115,761,840
Common stock, shares outstanding	81,741,180	81,626,874
Treasury stock, shares at cost	34,020,660	34,134,966