Summary of Intangible Assets from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets Net Excluding Goodwill [Line Items]
Intangible assets gross excluding goodwill	$ 93,517	$ 17,200
Gross Carrying Amount	93,117	16,800
Accumulated Amortization	(8,802)	(2,769)
Intangible assets, net	84,715	14,431
Finite intangible assets, Net Carrying Amount	84,315	14,031
Indefinite-lived intangible asset useful life	Indefinite	Indefinite
Other Intellectual Property
Intangible Assets Net Excluding Goodwill [Line Items]
Indefinite intangible assets, Net Carrying Amount	400	400
Customer Relationships
Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	59,098	13,317
Accumulated Amortization	(5,912)	(2,344)
Finite intangible assets, Net Carrying Amount	53,186	10,973
Trademarks/trade names
Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	15,643	1,547
Accumulated Amortization	(930)	(243)
Finite intangible assets, Net Carrying Amount	14,713	1,304
Technology
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life		10 years
Gross Carrying Amount	11,287	1,559
Accumulated Amortization	(865)	(149)
Finite intangible assets, Net Carrying Amount	10,422	1,410
Noncompete Agreements
Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	6,854	336
Accumulated Amortization	(1,058)	(29)
Finite intangible assets, Net Carrying Amount	5,796	307
Intellectual Property
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	5 years	5 years
Gross Carrying Amount	235	41
Accumulated Amortization	(37)	(4)
Finite intangible assets, Net Carrying Amount	$ 198	$ 37
Minimum | Customer Relationships
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	1 year	3 years
Minimum | Trademarks/trade names
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	3 years	3 years
Minimum | Technology
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	5 years
Minimum | Noncompete Agreements
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	2 years	2 years
Maximum | Customer Relationships
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	11 years	11 years
Maximum | Trademarks/trade names
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	11 years	11 years
Maximum | Technology
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	10 years
Maximum | Noncompete Agreements
Intangible Assets Net Excluding Goodwill [Line Items]
Finite intangible assets, useful life	5 years	5 years