CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Series A Convertible Preferred Stock [Member]	Class A Common Stock [Member]	Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]
BALANCE at Dec. 31, 2011	$ 1,017,942	$ 0	$ 4,551	$ 600	$ 1,404,648	$ (425,702)	$ 17,595	$ 16,250
BALANCE (in shares) at Dec. 31, 2011			56,892,114	7,500,936
BALANCE (in shares) at Dec. 31, 2011		0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	1,087				1,087
Dividends	(487)							(487)
Other	(227)				(227)
Net loss	(13,813)					(13,392)		(421)
Currency translation adjustment	67,090						67,096	(6)
BALANCE at Mar. 31, 2012	1,071,592	0	4,551	600	1,405,508	(439,094)	84,691	15,336
BALANCE (in shares) at Mar. 31, 2012			56,892,114	7,500,936
BALANCE (in shares) at Mar. 31, 2012		0
BALANCE at Dec. 31, 2012	631,267	0	6,174	0	1,556,250	(982,513)	46,150	5,206
BALANCE (in shares) at Dec. 31, 2012			77,185,129	0
BALANCE (in shares) at Dec. 31, 2012	1	1
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	994				994
Reclassification of capped call options	0				2,752	(2,752)
Dividends	(446)							(446)
Net loss	(108,962)					(108,280)		(682)
Currency translation adjustment	2,463						2,320	143
BALANCE at Mar. 31, 2013	$ 525,316	$ 0	$ 6,174	$ 0	$ 1,559,996	$ (1,093,545)	$ 48,470	$ 4,221
BALANCE (in shares) at Mar. 31, 2013			77,185,129	0
BALANCE (in shares) at Mar. 31, 2013	1	1