Other Assets (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Other Assets [Abstract]
Debt issuance costs, net	$ 4,945	[1]	$ 6,642	[1]
Other	3,236	[2]	15,233	[2]
Total other noncurrent assets, net	$ 8,181		$ 21,875

[1] See Note 15 for discussion of debt issuance costs.

[2] The change in other from the prior year is primarily due to assets held for sale related to SemStream Arizona which were sold in December 2012. See Note 6 for additional information related to the disposal.