CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (PARENTHETICALS) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 21,254,000	$ 20,096,000
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	41,263,408	40,805,281