Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Shares Outstanding Class A
Common stock, par value	$ 1	$ 1	$ 1
Common stock, shares outstanding	5,821,078	6,290,414	6,356,996
Shares Outstanding Class B
Common stock, par value	$ 1	$ 1	$ 1
Common stock, convertible conversion ratio	1	1	1
Common stock, shares outstanding	1,573,804	1,581,106	1,581,406