Geographic Information - Long Lived Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Long-lived assets	$ 222,179	$ 202,754
United States
Long-lived assets	79,181	75,446
Taiwan
Long-lived assets	65,677	67,379
China
Long-lived assets	$ 77,321	$ 59,929

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

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