Inventories (Narratives) (Details) $ in Thousands	Jan. 01, 2017 USD ($)
Retained Earnings
Inventory
Cumulative effect of adjustment	$ 6,769

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