Intangible Assets and Goodwill (Details 1) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Summary of roll forward of the changes in goodwill
Goodwill, beginning of period	$ 1,232,916,000	$ 1,201,300,000
Increase to goodwill	0	35,700,000
Other	0	(4,100,000)
Goodwill, end of period	$ 1,232,916,000	$ 1,232,916,000