Goodwill and Intangible Assets, Net, Goodwill (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Carrying amount of goodwill by reportable segment
Goodwill	$ 124,993	$ 123,950	$ 124,827
North America
Carrying amount of goodwill by reportable segment
Goodwill	86,035	85,834	84,311
Europe
Carrying amount of goodwill by reportable segment
Goodwill	37,537	36,720	39,049
Asia/Pacific
Carrying amount of goodwill by reportable segment
Goodwill	$ 1,421	$ 1,396	$ 1,467

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=35741047&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

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