Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued Liabilities and Other Liabilities [Abstract]
Interest expense	$ 569	$ 444
Professional fees	1,243	1,365
Equity-based incentive compensation	4,994	3,141
Taxes other than income	3,410	1,169
Management fees payable to affiliate	188	139
Termination benefits	2,357
Acquisition costs	3,783
Other	4,417	1,750
Total accrued expenses and other current liabilities	$ 20,961	$ 8,008