CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
CONDENSED CONSOLIDATED BALANCE SHEETS [Abstract]
Common stock, par value	$ 1	$ 1	$ 1
Common stock, shares authorized	480,000,000	480,000,000	480,000,000
Common stock, shares outstanding	133,348,000	133,172,000	132,660,000