Summary of Significant Accounting Policies - Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total cost	$ 171,250	$ 165,393
Accumulated depreciation and amortization	(54,134)	(45,543)
Property and equipment, net	117,116	119,850
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	4,133	4,133
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total cost	30,498	30,364
Machinery, equipment and tooling [Member]
Property, Plant and Equipment [Line Items]
Total cost	107,093	103,477
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	7,696	7,696
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	941	941
Information systems [Member]
Property, Plant and Equipment [Line Items]
Total cost	1,070	1,070
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 19,819	$ 17,712