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Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Finite Lived Intangible Asset Useful Life [Line Items]
Cost	$ 16,308	$ 4,157
Accumulated Amortization	2,324	2,874
Patents [Member]
Finite Lived Intangible Asset Useful Life [Line Items]
Cost	1,414	1,414
Accumulated Amortization	1,322	1,281
Employment agreements [Member]
Finite Lived Intangible Asset Useful Life [Line Items]
Cost	730	170
Accumulated Amortization	81	0
Technology [Member]
Finite Lived Intangible Asset Useful Life [Line Items]
Cost	5,319	230
Accumulated Amortization	169	0
Customer lists [Member]
Finite Lived Intangible Asset Useful Life [Line Items]
Cost	8,845	2,343
Accumulated Amortization	$ 752	$ 1,593

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

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