Asset Retirement Obligations (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Asset Retirement Obligations
Estimated cost of AROs expressed in 2013 dollars	$ 5.9

Represents the estimated cost of an asset retirement obligation for which a liability has not been recognized because fair value cannot be reasonably estimated.

No definition available.

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