Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended
	May 31, 2008	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Employee Severance	Jun. 30, 2013 Letter of credit	Jun. 30, 2013 Property lease guarantee Laureate Pharma's	Jun. 30, 2013 Clawback Liability	Jun. 30, 2013 Accrued expenses and other current liabilities	Jun. 30, 2013 Accrued expenses and other current liabilities Clawback Liability	Jun. 30, 2013 Other long-term liabilities	Jun. 30, 2013 Other long-term liabilities Clawback Liability	Jun. 30, 2013 Private equity funds
Commitment Contingencies And Guarantees [Line Items]
Company outstanding guarantees		$ 3,800,000			$ 2,400,000	$ 6,300,000
Committed capital of private equity funds													100,000
Accrued expenses and other current liabilities								1,300,000
Accrued expenses and other current liabilities		3,631,000		2,601,000						1,000,000
Other long-term liabilities		3,862,000		3,921,000								300,000
Company's ownership in the funds								19.00%
Proceeds from sales of and distributions from companies and funds	6,400,000	1,403,000	11,061,000
Remaining lease payments							4,200,000
Guarantee lease expiration year of Laureate Pharma's		2016
Annual payments		650,000
Liability to former chairman and chief executive officer, current									800,000
Liability to former chairman and chief executive officer, non-current											2,800,000
Letter of credit expiration date						Mar. 19, 2019
Severance charge					$ 900,000