PARENTHETICAL DATA TO THE CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2011	Dec. 31, 2010
Stockholders' Equity:
Preferred Stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	37,758,719	37,010,140
Treasury Stock (common) at cost	2,113,247	1,086,172