Goodwill and Intangible Assets, Net, Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Carrying amount of goodwill by reportable segment
Goodwill	$ 131,712	$ 130,250	$ 138,026
North America
Carrying amount of goodwill by reportable segment
Goodwill	96,491	96,435	95,677
Europe
Carrying amount of goodwill by reportable segment
Goodwill	33,867	32,471	40,883
Asia/Pacific
Carrying amount of goodwill by reportable segment
Goodwill	$ 1,354	$ 1,344	$ 1,466

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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