CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Condensed Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 1.33	$ 1.33
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	43,854,381	44,785,674
Common stock, shares outstanding	43,854,381	44,785,674