CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member] Class A [Member]	Common Stock [Member] Class B [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Noncontrolling Interest [Member]	Total	Comprehensive Income [Member]
Balances at Dec. 31, 2008	$ 74	$ 6	$ 1,494,642	$ (118)	$ (1,481,021)	$ 129,673	$ 143,256
Balances (in shares) at Dec. 31, 2008	7,382,265	578,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	116,545	(11,459)	105,086	105,086
Conversion of Class B shares to Class A shares (in shares)	12,469	(12,469)
Conversion of Class B shares to Class A shares	0	0	0	0	0	0	0	0
Issuance of Class A common stock (in shares)	1,816
Issuance of Class A common stock	0	0	364	0	0	0	364	0
Retirement of Class A common stock (in shares)	(27,500)
Retirement of Class A common stock	0	0	(275)	0	0	0	(275)	0
Forfeitures of Class A common stock (in shares)	(16,276)	(3)
Forfeitures of Class A common stock	0	0	(213)	0	0	0	(213)	0
Stock compensation expense for stock options	0	0	23	0	0	0	23	0
Amortization of Class A common shares issued as stock-based awards	0	0	7,795	0	0	0	7,795	0
Equity in issuance of subsidiary common shares to employees	0	0	5,058	0	0	0	5,058	0
Elimination of noncontrolling interest resulting from sale of subsidiary	0	0	0	0	0	(118,269)	(118,269)	0
Other comprehensive income (loss)
Net change in unrealized gain on available-for-sale investment securities, (net of taxes of $-0-)	0	0	0	7,133	0	55	7,188	7,188
Comprehensive income								112,274
Balances at Dec. 31, 2009	74	6	1,507,394	7,015	(1,364,476)	0	150,013
Balances (in shares) at Dec. 31, 2009	7,352,774	566,112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	26,586		26,586	26,586
Issuance of Class A common stock (in shares)	4,353
Issuance of Class A common stock	0	0	447	0	0		447	0
Repurchase of Class A common stock (in shares)	(243,815)
Repurchase of Class A common stock	(2)	0	(4,901)	0	0		(4,903)	0
Forfeitures of Class A common stock (in shares)	(6,982)
Forfeitures of Class A common stock	(1)	0	(122)	0	0		(123)	0
Amortization of Class A common shares issued as stock-based awards	0	0	3,153	0	0		3,153	0
Other comprehensive income (loss)
Net change in unrealized gain on available-for-sale investment securities, (net of taxes of $-0-)	0	0	0	56,480	0		56,480	56,480
Comprehensive income								83,066
Dividends declared	0	0	0	0	(14,909)		(14,909)
Balances at Dec. 31, 2010	71	6	1,505,971	63,495	(1,352,799)		216,744
Balances (in shares) at Dec. 31, 2010	7,106,330	566,112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	15,173		15,173	15,173
Issuance of Class A common stock (in shares)	29,147
Issuance of Class A common stock	0	0	545	0	0		545	0
Repurchase of Class A common stock (in shares)	(8,910)
Repurchase of Class A common stock	0	0	(229)	0	0		(229)	0
Forfeitures of Class A common stock (in shares)	(27,231)
Forfeitures of Class A common stock	0	0	(770)	0	0		(770)	0
Amortization of Class A common shares issued as stock-based awards	0	0	601	0	0		601	0
Reclassification of restricted stock units issued as stock based awards	0	0	2,595	0	0		2,595	0
Other comprehensive income (loss)
Net change in unrealized gain on available-for-sale investment securities, (net of taxes of $-0-)	0	0	0	(25,128)	0		(25,128)	(25,128)
Comprehensive income								(9,955)
Dividends declared	0	0	0	0	(26,159)		(26,159)
Balances at Dec. 31, 2011	$ 71	$ 6	$ 1,508,713	$ 38,367	$ (1,363,785)		$ 183,372
Balances (in shares) at Dec. 31, 2011	7,099,336	566,112