Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Land	$ 2,830	$ 2,830
Buildings and improvements	13,114	8,794
Machinery and equipment	39,209	28,178
Computer hardware and software	5,019	4,102
Leasehold improvements	2,921	1,811
Construction in progress	1,903	2,521
Capital leases	1,512	1,493
Property and equipment, gross	66,508	49,729
Accumulated depreciation and amortization	(21,192)	(15,480)
Property and equipment, net	$ 45,316	$ 34,249