Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid insurance	$ 8,047	$ 8,418
Prepaid marketing and advertising costs	6,965	6,817
Other	5,882	4,378
Total prepaid expenses and other current assets	$ 20,894	$ 19,613