Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Redeemable Preferred Stock, par value per share	$ 1	$ 1
Redeemable Preferred Stock, redemption value per share	$ 1,000	$ 1,000
Redeemable Preferred Stock, liquidation value per share	$ 1,000	$ 1,000
Redeemable Preferred Stock, shares authorized	23,000	23,000
Redeemable Preferred Stock, shares issued	10,510	10,665
Redeemable Preferred Stock, shares outstanding	10,510	10,665
Preferred Stock, par value per share	$ 1	$ 1
Preferred Stock, shares authorized	977,000	977,000
Preferred Stock, shares issued	0	0
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	$ 1,235
Class A Common Stock [Member]
Common Stock, par value per share	$ 1	$ 1
Common Stock, shares authorized	7,000,000	7,000,000
Common Stock, shares issued	974,823	1,169,073
Common Stock, shares outstanding	974,823	1,169,073
Class B Common Stock [Member]
Common Stock, par value per share	$ 1	$ 1
Common Stock, shares authorized	40,000,000	40,000,000
Common Stock, shares issued	19,025,177	18,830,927
Common Stock, shares outstanding	4,823,966	6,218,051
Treasury Stock	14,201,211	12,612,876