Condensed Consolidated Statements of Cash Flows Condensed Consolidation Statements of Cash Flows (Parenthetical) $ in Thousands	9 Months Ended
Sep. 30, 2017 USD ($)
Statement of Cash Flows [Abstract]
Cash transferred in deconsolidation	$ 36,581

Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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