Property, Plant and Equipment (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment
Gross Property, Plant and Equipment	$ 371,125,000	$ 281,249,000
Less: Accumulated depreciation	96,753,000	85,102,000
Net Property, Plant and Equipment	274,372,000	196,147,000
Capitalized interest	1,300,000	400,000	100,000
Depreciation expense	13,100,000	11,300,000	11,200,000
Crude Oil Gathering
Property, Plant and Equipment
Gross Property, Plant and Equipment	116,744,000	97,249,000
Terminalling, Transportation and Storage
Property, Plant and Equipment
Gross Property, Plant and Equipment	$ 254,381,000	$ 184,000,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References+ Details

- Definition

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details