Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Taxes [Line Items]
Effective tax rate	(2.00%)	80.40%	16.30%	44.80%
Gross unrecognized tax benefits excluding interest and penalties	$ 32,318		$ 32,318		$ 47,684
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate	15,286		15,286
Accrued interest on unrecognized tax benefits	$ 1,340		$ 1,340		$ 2,159
Income tax examination, description			The Company and its subsidiaries are subject to examination by federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company's U.S. federal tax filings for tax years 2007 through 2009 during the quarter ended June 30, 2012.
Earliest Tax Year [Member]
Income Taxes [Line Items]
Income tax examination period			2007
Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Open tax year			2009
Latest Tax Year [Member]
Income Taxes [Line Items]
Income tax examination period			2009
Latest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Open tax year			2011