Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Distributor Segment	Dec. 31, 2010	Dec. 31, 2009
Revenue from External Customer [Line Items]
Long-lived assets related to operations in Denmark	$ 1,838.4	$ 1,826.2	$ 1,805.4
Segment Information (Textual) [Abstract]
Number of reportable segment	1
Number of wholesale distributors	2
Revenues from unconsolidated joint business in percentage	20.00%	23.00%	25.00%
Distributor One [Member]
Revenue from External Customer [Line Items]
Entity wide percentage of revenue from major distributors	18.00%	18.00%	18.00%
Distributor Two [Member]
Revenue from External Customer [Line Items]
Entity wide percentage of revenue from major distributors	10.00%	11.00%	12.00%
DENMARK
Revenue from External Customer [Line Items]
Long-lived assets related to operations in Denmark	$ 668.5	$ 644.7	$ 665.8