Schedule of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross balance	$ 13,763	$ 13,644
Accumulated Amortization	(5,586)	(3,118)
Net	8,177	10,526
Acquired Software and Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross balance	6,517	6,425
Accumulated Amortization	(2,258)	(947)
Net	4,259	5,478
Patent Licenses
Finite-Lived Intangible Assets [Line Items]
Gross balance	4,500	4,500
Accumulated Amortization	(1,773)	(1,130)
Net	2,727	3,370
Non-Compete Covenant
Finite-Lived Intangible Assets [Line Items]
Gross balance	499	489
Accumulated Amortization	(356)	(104)
Net	143	385
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross balance	2,247	2,230
Accumulated Amortization	(1,199)	(937)
Net	$ 1,048	$ 1,293