CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Common stock, par value	$ 0.125	$ 0.125
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	48,692,000	48,674,000
Common stock, shares outstanding	48,692,000	48,674,000