Subsequent Event (Narrative) (Details) - New Amended and Restated Credit Agreements - Credit Agreement - Subsequent event	Feb. 27, 2018
Minimum
Subsequent Event [Line Items]
Minimum fixed charge coverage ratio, per quarter	1.01
Maximum
Subsequent Event [Line Items]
Minimum fixed charge coverage ratio, per quarter	1.00

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration