Summary of Balances of Transactions with Related Parties (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Transactions with Third Party [Line Items]
Accounts payable	$ 8,886	[1]	$ 3,845	[1]
Other long-term liabilities	333	[1]	2,847	[1]
Unvested Stock Options
Transactions with Third Party [Line Items]
Accounts payable	200		400
Other long-term liabilities	$ 300		$ 2,800

[1] Includes an account payable of $0.2 million and $0.4 million and a long-term liability of $0.3 million and $2.8 million for December 31, 2013 and 2012, respectively, related to the unvested portion of stock options as a result of the equitable adjustment approved by the Company's Board of Directors on December 18, 2012 that will be payable to executive officers and employees upon vesting of stock options.