Summary of Business and Significant Accounting Policies (FV, Intangibles,AFS) (Details)	9 Months Ended
Sep. 30, 2016 contract
Revenue Recognition
Number of types of contracts which may earn revenue	4
Maximum
Intangible assets
Useful lives of intangible assets	10 years

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration