Long-term Debt Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		12 Months Ended		12 Months Ended		0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Senior credit facilities [Member]	Dec. 31, 2011 Senior credit facilities [Member]	Dec. 31, 2012 TEUs - Amortizing Notes [Member]	Dec. 31, 2011 TEUs - Amortizing Notes [Member]	Oct. 02, 2012 Series B Senior Notes [Member]	Dec. 31, 2012 Series B Senior Notes [Member]	Dec. 31, 2011 Series B Senior Notes [Member]	Jul. 26, 2012 Series C Senior Notes [Member]	Dec. 31, 2012 Series C Senior Notes [Member]	Dec. 31, 2011 Series C Senior Notes [Member]	Dec. 31, 2012 Other Debt Obligations [Member]	Dec. 31, 2011 Other Debt Obligations [Member]
Debt instrument, maturity date	Jul. 29, 2016		Oct. 01, 2017		Oct. 01, 2015			Jul. 26, 2015			Jul. 26, 2012		Oct. 01, 2054
Debt Instrument, Interest Rate, Stated Percentage			3.04%	3.15%	5.00%			5.36%	5.36%			1.12%	10.00%
Long-term debt	$ 1,858,135	$ 626,194	$ 1,805,799	$ 493,345	$ 32,435	$ 0		$ 0	$ 100,000		$ 0	$ 25,000	$ 19,901	$ 7,849
Debt, current portion	87,569	57,168
Long-term debt, less current portion	$ 1,770,566	$ 569,026
Repayment of Debt							Oct. 01, 2012			Jul. 26, 2012