XML 41 R97.htm IDEA: XBRL DOCUMENT v2.4.0.8

Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended	24 Months Ended
	Dec. 31, 2013 case	Dec. 31, 2013
Litigation and Claims
Number of heavy equipment statutes cases tried and completed in Texas state district court	2
Number of other state district court cases in which the entity filed motions for summary judgment	3
Ad valorem tax benefit	$ 8.0	$ 14.8
Ad valorem tax benefit agreed to by a number of appraisal review boards and county appraisal districts	3.3	3.3
Ad valorem tax benefit in litigation	11.5	11.5
Maximum
Business acquisition, contingent consideration
Contingent payments	$ 46	$ 46

X

- Definition

The amount of ad valorem tax expense (benefit) included as a component of cost of goods sold (excluding depreciation and amortization).

+ References

No definition available.

+ Details

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Namespace Prefix:	exh_
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X

- Definition

The amount of ad valorem tax expense (benefit) agreed to by one or more appraisal review boards and/or county appraisal districts.

+ References

No definition available.

+ Details

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X

- Definition

The amount of ad valorem tax expense (benefit) in litigation in various courts.

+ References

No definition available.

+ Details

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Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Represents the number of heavy equipment statutes cases tried and completed to which the entity is a party.

+ References

No definition available.

+ Details

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Namespace Prefix:	exh_
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Balance Type:	na
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X

- Definition

Number of state district court cases in which the entity filed motion for summary judgment.

+ References

No definition available.

+ Details

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Namespace Prefix:	exh_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Details

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X

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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X

- Details

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