Commitments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Commitments
Commitments related to firm quantities of gas and open purchase orders	$ 53.4

Represents the commitments amount related to firm quantities of gas and open purchase orders.

No definition available.

Name:	tnh_GasAndOpenPurchaseOrdersCommitmentsAmount
Namespace Prefix:	tnh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant