Changes in Investment of Kanghong Sagent Pharmaceutical Corporation Limited (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]
Investment at beginning of year			$ 19,622
Equity in net loss (income) of joint ventures	160	(105)	603	351
Investment at end of year	2,016		2,016
KSCP
Schedule of Equity Method Investments [Line Items]
Investment at beginning of year			17,461
Equity in net loss (income) of joint ventures			(1,825)
Currency translation adjustment			294
Investments			19
Acquisition of remaining equity interest in KSCP			$ (15,949)