Goodwill And Intangible Assets (Changes In Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets
Balance, beginning of period	$ 1,652,002	$ 1,229,298
Goodwill acquired, including post acquisition adjustments	112,951	429,504
Goodwill disposed, including impact of deconsolidation transaction	(5,983)	(6,800)
Balance, end of period	$ 1,758,970	$ 1,652,002