Long-Term Debt (Narrative) (Details) - Letter of Credit $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Capacity on letters of credit	$ 11.0
Letters of credit, renewable term	1 year

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for financing purchases of goods acquired for inventory or imminent delivery to a customer.

No definition available.

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