Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision	$ 1,474	$ 2,469
Liability for income taxes associated with uncertain tax positions	11,155
Tax benefits associated with potential transfer pricing adjustments	2,238
Tax benefits associated with state income taxes	6,923
Net amount of unrecognized tax benefit related to uncertain tax positions that would impact, if recognized, effective income tax rate	1,994
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	1,322
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	589
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	88	263
Income tax accrued for payment of interest and penalties	$ 1,075		$ 1,163