Commitments and Contingencies - Amounts of Assets Under Capitalized Lease Agreements and Related Obligations are Included in Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Capital Leased Assets [Line Items]
Accumulated depreciation	$ (2,872)	$ (2,584)
Net assets under capital leases	1,625	1,913
Property and Equipment [Member]
Capital Leased Assets [Line Items]
Other long-term assets	4,367	4,367
Prepaid Expenses and Other Assets [Member]
Capital Leased Assets [Line Items]
Other long-term assets	$ 130	$ 130