Fair Value Measurements Fair value measurements Narrative (Details) (USD $)			3 Months Ended
	Sep. 30, 2013 CGI and Calistoga [Member]	Dec. 31, 2012 CGI and Calistoga [Member]	Mar. 31, 2012 Greek Government Bonds [Member]	Sep. 30, 2012 Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale of auction rate securities				$ 37,300,000
Loss on sale of auction rate securities				3,800,000
Loss related to debt restructuring of Greek bonds			40,100,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Business combination, contingent consideration arrangements, range of outcomes, value, high	254,000,000
Contingent Consideration	$ 190,800,000	$ 159,300,000