Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Term-A Facility [Member]	Dec. 31, 2013 Term-A Facility [Member]	Jun. 30, 2014 7.75% Senior Notes [Member]	Dec. 31, 2013 7.75% Senior Notes [Member]	Jun. 30, 2011 7.75% Senior Notes [Member]	Jun. 30, 2014 4.75% Senior Notes [Member]	Dec. 31, 2013 4.75% Senior Notes [Member]	Dec. 17, 2012 4.75% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 2,780,000	$ 2,180,000	$ 1,480,000	$ 880,000	$ 700,000	$ 700,000		$ 600,000	$ 600,000	$ 600,000
Debt Instrument, Unamortized Discount	(21,647)	(22,817)
Long-term Debt	2,758,353	2,157,183	1,478,486	878,315	689,065	688,497		590,802	590,371
Debt, Current	37,000	0
Long-term Debt, Excluding Current Maturities	$ 2,721,353	$ 2,157,183
Debt Instrument, Interest Rate, Stated Percentage					7.75%		7.75%	4.75%		4.75%