CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Allowance for doubtful accounts	$ 18,541,000	$ 19,449,000
Cumulative preferred stock, par value	$ 5	$ 5
Cumulative preferred stock, shares authorized	12,000,000	12,000,000
Cumulative preferred stock, shares issued	0	0
Cumulative preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.5	$ 0.5
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	109,659,219	109,659,219
Treasury stock, shares at cost	40,162,000	40,180,724