Impact of Recent Accounting Standards Impact of Recent Accounting Standards Text Tag (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Cumulative Effect of New Accounting Principle	$ 0
Accumulated Other Comprehensive Loss
Cumulative Effect of New Accounting Principle	$ 721

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.

No definition available.

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