XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.19.1

Basis of Presentation Additional Information (Details) $ in Thousands | Dec. 31, 2017 USD ($)
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Cumulative Effect of New Accounting Principle in Period of Adoption | $ 0

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration