Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011
Revenue from External Customer [Line Items]
Revenues from unconsolidated joint business in percentage	16.00%	21.00%	20.00%
Long-lived assets related to operations in Denmark	$ 1,750.7	$ 1,742.2	$ 1,838.4
Segment Information (Textual) [Abstract]
Number of reportable segment	1
Distributor One
Revenue from External Customer [Line Items]
Entity wide percentage of revenue from major distributors	32.00%	20.00%	18.00%
Distributor Two
Revenue from External Customer [Line Items]
Entity wide percentage of revenue from major distributors	24.00%	10.00%	10.00%
DENMARK
Revenue from External Customer [Line Items]
Long-lived assets related to operations in Denmark	$ 731.1	$ 713.4	$ 668.5