Goodwill and Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Carrying amount of goodwill by reportable segment
Goodwill	$ 129,231	$ 129,218	$ 122,678
North America
Carrying amount of goodwill by reportable segment
Goodwill	84,806	84,822	81,080
Europe
Carrying amount of goodwill by reportable segment
Goodwill	42,632	42,690	39,853
Asia/Pacific
Carrying amount of goodwill by reportable segment
Goodwill	$ 1,793	$ 1,706	$ 1,745

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant