Accounts Receivable (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable balances on product sales from different countries
Current balance included within accounts receivable, net	$ 753,611,000	$ 686,848,000
Spain [Member]
Accounts receivable balances on product sales from different countries
Current balance included within accounts receivable, net	79,300,000	78,900,000
Non-current balance included within accounts receivable, net	0	0
Total	79,300,000	78,900,000
Italy [Member]
Accounts receivable balances on product sales from different countries
Current balance included within accounts receivable, net	106,900,000	94,400,000
Non-current balance included within accounts receivable, net	6,400,000	10,200,000
Total	113,300,000	104,600,000
Portugal [Member]
Accounts receivable balances on product sales from different countries
Current balance included within accounts receivable, net	15,000,000	16,600,000
Non-current balance included within accounts receivable, net	9,200,000	7,400,000
Total	$ 24,200,000	$ 24,000,000