Amortizable Intangible Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Alliance and product supply agreement commitment (See Note 18)	$ 68,200	$ 68,200
Less accumulated amortization	(64,203)	(58,873)
Net Alliance and product supply agreement	3,997	9,327
Lease agreements (net of accumulated amortization of $4,785 and $2,628)	10,407	12,563
Finite Lived Intangible Liabilities Net, Total	$ 14,404	$ 21,890