Intangible Assets, Other Assets, Net and Goodwill Future Amortization of Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 6,800,000	$ 6,800,000	$ 6,600,000
2013	23,323,000
2014	23,255,000
2015	23,186,000
2016	23,137,000
2017	23,137,000
Thereafter	518,145,000
Total	$ 634,183,000	$ 194,606,000