Cash Distribution (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
Mar. 31, 2019	Jun. 30, 2019
Dividend Restrictions
One-time cash distribution	$ 5,100	$ 5,120

Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

Name:	us-gaap_PaymentsOfCapitalDistribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration