Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Common stock, par value	$ 2.00	$ 2.00
Common stock, shares authorized	400,000,000	400,000,000
Common stock, issued	188,072,946	187,676,711
Treasury stock, at cost	366,587	313,568
Accumulated other comprehensive loss, taxes	$ 16,427	$ 25,039