Indebtedness (Details)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Note payable to Fumedica USD ($)	Dec. 31, 2013 Note payable to Fumedica USD ($)	Dec. 31, 2006 Note payable to Fumedica CHF	Dec. 31, 2014 6.875% Senior notes due 2018 USD ($)	Dec. 31, 2013 6.875% Senior notes due 2018 USD ($)
Current portion:
Note payable to Fumedica			$ 3,100,000	$ 3,500,000
Current portion of notes payable	3,136,000	3,494,000
Non-current portion:
Non-current notes payable	562,700,000		8,600,000	12,300,000	61,400,000	573,500,000	580,100,000
Non-current portion of notes payable	$ 582,061,000	$ 592,433,000