CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Interest receivable	$ 103,414	$ 110,339
Accrued interest payable	51,779	60,854
Series C Preferred Stock
Preferred stock, Series C, par value	$ 1,000	$ 1,000
Preferred stock, Series C, shares authorized	100,000	100,000
Preferred stock, Series C, shares issued	57,578	57,578
Preferred stock, Series C, shares outstanding	57,578	57,578
Common Stock, Class A Voting
Common stock, par value	$ 1	$ 1
Common stock, shares outstanding	1,030,780	1,030,780
Common stock, Class B Voting
Common stock, par value	$ 1	$ 1
Common stock, shares outstanding	500,301	500,301
Common stock, Class C Non-Voting
Common stock, par value	$ 1	$ 1
Common stock, shares outstanding	9,171,343	8,825,794
Variable Interest Entity, Primary Beneficiary [Member]
Interest receivable	9,676	15,578
Accrued interest payable	$ 2,534	$ 7,659