Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill And Intangible Assets [Line Items]
Goodwill, beginning of year	$ 391,498	$ 822,247	$ 826,009
Intangible assets with an indefinite life, beginning of year	15,366	15,366	15,366
Intangible assets with a definite life, beginning of year	457	1,895	3,754
Goodwill and other intangible assets, beginning of year	407,321	839,508	845,129
Amortization	(178)	(1,438)	(1,859)
Foreign currency translation	1,384	(1,729)	(3,762)
Impairment of goodwill	0	(429,020)	0
Goodwill, end of year	392,882	391,498	822,247
Intangible assets with an indefinite life, end of year	15,366	15,366	15,366
Intangible assets with a definite life, end of year	279	457	1,895
Goodwill and other intangible assets, end of year	408,527	407,321	839,508
Goodwill [Member]
Goodwill And Intangible Assets [Line Items]
Foreign currency translation	1,384	(1,729)	(3,762)
Impairment of goodwill		(429,020)
Finite-Lived Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Amortization	$ (178)	$ (1,438)	$ (1,859)