CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Deferred loan and senior notes costs, accumulated amortization	$ 6,020	$ 4,554
Common Stock - Class A [Member]
Common Stock, no par (USD per share)
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	37,443,000	38,534,000
Common Stock, Shares Outstanding	37,353,000	38,357,000
Treasury Stock, Shares	90,000	177,000
Common Stock - Class B [Member]
Common Stock, no par (USD per share)
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares Issued	3,166,000	3,169,000
Common Stock, Shares Outstanding	3,166,000	3,169,000
Treasury Stock, Shares	0	0