XML 25 R54.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Background and Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2011 Y
Compression equipment, facilities and other fleet assets [Member] |
Property, plant and equipment estimated useful lives |
Property, plant and equipment, estimated useful life, minimum | 3
Property, plant and equipment, estimated useful life, maximum | 30
Building [Member] |
Property, plant and equipment estimated useful lives |
Property, plant and equipment, estimated useful life, minimum | 20
Property, plant and equipment, estimated useful life, maximum | 35
Transportation, shop equipment and other [Member] |
Property, plant and equipment estimated useful lives |
Property, plant and equipment, estimated useful life, minimum | 3
Property, plant and equipment, estimated useful life, maximum | 12

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- Details
Name: | exh_PropertyPlantAndEquipmentEstimatedUsefulLivesAbstract
Namespace Prefix: | exh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration