Accounts Payable, Accrued Expenses and Other - Schedule of Accounts Payable, Accrued Expenses and Other (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts Payable Accrued Expenses And Other [Line Items]
Accounts payable	$ 1,889	$ 283
Accrued goods and services	26,031	17,615
Accrued payroll and related benefits	7,255	5,853
Accrued interest	2,926	306
Accrued dividends payable	25	28
Deferred tax incentives	688	512
Derivative liability		196
Total accounts payable, accrued expenses and other	38,814	25,644
Sanofi [Member] | License and Collaboration Agreements [Member]
Accounts Payable Accrued Expenses And Other [Line Items]
Other contractual liability		$ 851