Subsequent Event (Details) - Roanoke Rapids, North Carolina - Subsequent event $ in Millions	Apr. 21, 2016 USD ($) T
Subsequent event
Period for which outage lasted	9 days
Planned maintenance outage costs \| $	$ 8.9
Reduction in production (in tons) \| T	12,600

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