CONSOLIDATED STATEMENT OF CHANGES IN EQUITY AND NONCONTROLLING INTEREST (USD $) In Thousands	Convertible Preferred Stock [Member]	Common Class A [Member]	Common Class B [Member]	Common Class C [Member]	Common Class D [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
BALANCE at Dec. 31, 2012	$ 0	$ 3	$ 3	$ 3	$ 41	$ (102)	$ 1,006,873	$ (863,021)	$ 210,698	$ 354,498
Consolidated net (loss) income	0	0	0	0	0	0	0	(18,106)	5,878	(12,228)
Net change in unrealized loss on investment activities	0	0	0	0	0	(20)	0	0	0	(20)
Repurchase of 7,150 shares of Class A common stock	0	0	0	0	0	0	(11)	0	0	(11)
Repurchase of 951,974 shares of Class D common stock	0	0	0	0	(1)	0	(1,514)	0	0	(1,515)
Dividends paid to noncontrolling interest	0	0	0	0	0	0	0	0	(7,829)	(7,829)
Adjustment of redeemable noncontrolling interests to estimated redemption value	0	0	0	0	0	0	(346)	0	0	(346)
Stock-based compensation expense	0	0	0	0	0	0	43	0	0	43
BALANCE at Mar. 31, 2013	$ 0	$ 3	$ 3	$ 3	$ 40	$ (122)	$ 1,005,045	$ (881,127)	$ 208,747	$ 332,592