Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, plant and equipment, net
Property, plant and equipment, gross	$ 4,875,385	$ 4,817,383
Accumulated depreciation	(2,015,963)	(1,975,352)
Property, plant and equipment, net	2,859,422	2,842,031
Compression equipment, facilities and other fleet assets
Property, plant and equipment, net
Property, plant and equipment, gross	4,256,299	4,207,772
Land and buildings
Property, plant and equipment, net
Property, plant and equipment, gross	185,868	186,410
Transportation and shop equipment
Property, plant and equipment, net
Property, plant and equipment, gross	268,296	261,520
Other
Property, plant and equipment, net
Property, plant and equipment, gross	$ 164,922	$ 161,681

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.

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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.

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- 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.

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