Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cost	$ 44,190	$ 30,148
Accumulated Amortization	28,165	27,511
Net Book Value	16,025us-gaap_FiniteLivedIntangibleAssetsNet	2,637us-gaap_FiniteLivedIntangibleAssetsNet
Customer Contracts and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	26,638	17,381
Accumulated Amortization	16,421	15,933
Net Book Value	10,217	1,448
Patents and Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	9,947	6,781
Accumulated Amortization	6,528	6,507
Net Book Value	3,419	274
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	4,960	3,988
Accumulated Amortization	3,240	3,152
Net Book Value	1,720	836
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	2,645	1,998
Accumulated Amortization	1,976	1,919
Net Book Value	$ 669	$ 79

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

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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