Consolidating Financial Statements - Schedule of Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Assets
Total current assets	$ 314,915	$ 477,945	[1]
Property, plant and equipment, net	510,381	433,258	[1]
Investment in unconsolidated entities	154,309	132,605	[1]
Investment in subsidiary	0	0
Total other assets	33,391	25,300
Total Assets	1,012,996	1,069,108	[1]
Liabilities and Partners’ Capital
Total current liabilities	178,482	262,195	[1]
Long-term debt and capital leases, less current maturities	474,992	458,941	[1]
Other long-term obligations	1,560	10,785
Partners’ capital	357,962	337,187	[1]	327,960	306,594
Total Liabilities and Partners' Capital	1,012,996	1,069,108	[1]
Guarantor Subsidiaries [Member]
Assets
Total current assets	552,282	579,196
Property, plant and equipment, net	510,381	433,258
Investment in unconsolidated entities	0	0
Investment in subsidiary	(83,058)	124
Total other assets	33,391	25,300
Total Assets	1,012,996	1,037,878
Liabilities and Partners’ Capital
Total current liabilities	178,482	262,195
Long-term debt and capital leases, less current maturities	474,992	458,941
Other long-term obligations	1,560	10,785
Partners’ capital	357,962	305,957
Total Liabilities and Partners' Capital	1,012,996	1,037,878
Non-Guarantor Subsidiaries [Member]
Assets
Total current assets	0	0
Property, plant and equipment, net	0	0
Investment in unconsolidated entities	154,309	132,605
Investment in subsidiary	0	0
Total other assets	0	0
Total Assets	154,309	132,605
Liabilities and Partners’ Capital
Total current liabilities	237,367	101,251
Long-term debt and capital leases, less current maturities	0	0
Other long-term obligations	0	0
Partners’ capital	(83,058)	31,354
Total Liabilities and Partners' Capital	154,309	132,605
Consolidation, Eliminations [Member]
Assets
Total current assets	(237,367)	(101,251)
Property, plant and equipment, net	0	0
Investment in unconsolidated entities	0	0
Investment in subsidiary	83,058	(124)
Total other assets	0	0
Total Assets	(154,309)	(101,375)
Liabilities and Partners’ Capital
Total current liabilities	(237,367)	(101,251)
Long-term debt and capital leases, less current maturities	0	0
Other long-term obligations	0	0
Partners’ capital	83,058	(124)
Total Liabilities and Partners' Capital	$ (154,309)	$ (101,375)

[1] Financial information has been revised to include balances attributable to Redbird Class A interests and the Blending and Packaging Assets acquired from Cross. See Note 2(a) – Principles of Presentation and Consolidation.