Significant Accounting Policies (Details) $ in Millions	Sep. 30, 2016 USD ($) investment	Jan. 01, 2016 investment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of variable interest entities consolidated \| investment	2
Net assets of non-consolidated variable interest entities \| $	$ 43,000.0
Maximum risk of loss in variable interest entities \| $	$ 11.6
Early Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of variable interest entities consolidated \| investment	2	3

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5747-111685

Name:	us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant