Income Taxes - Balance Sheet Classification of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits [Line Items]
Accrued expenses	$ 3,348	$ 1,427	$ 3,744
Other long-term liabilities	37,130	26,307	25,384
Total	$ 40,478	$ 27,734	$ 29,128	$ 18,302