Condensed Consolidated Balance Sheets Parenthetical (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 7,334	$ 7,299
Common, stated value per share	$ 20	$ 20
Authorized	20,000,000	20,000,000
Issued to voting trustees	9,915,385	9,498,347
Issued to shareholders	2,199,655	2,148,384
In treasury, at cost	(393,731)	(26,755)
Outstanding Common Stock	11,721,309	11,619,976