Goodwill and Intangible Assets (Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 64,333	$ 62,694
Accumulated Amortization	11,045	6,245
Net Carrying Amount	53,288	56,449
Trademarks and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,283	6,118
Accumulated Amortization	227	140
Net Carrying Amount	6,056	5,978
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	36,479	35,769
Accumulated Amortization	8,394	4,655
Net Carrying Amount	28,085	31,114
Covenant not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,042	956
Accumulated Amortization	358	135
Net Carrying Amount	684	821
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,529	19,851
Accumulated Amortization	2,066	1,315
Net Carrying Amount	$ 18,463	$ 18,536