XML 73 R63.htm IDEA: XBRL DOCUMENT v2.4.0.8

Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended	15 Months Ended	30 Months Ended
	Jun. 30, 2014 case	Mar. 31, 2014 case	Jun. 30, 2014	Dec. 31, 2013
Business acquisition, contingent consideration
Accrued liability for the outcomes of non-income based tax audits	$ 7.3		$ 7.3	$ 16.1
Litigation and Claims
Number of heavy equipment statutes cases tried and completed in Texas state district court		3
Number of other state district court cases in which the entity filed motions for summary judgment	2
Ad valorem tax benefit	5.5		20.3
Ad valorem tax benefit agreed to by a number of appraisal review boards and county appraisal districts	5.3		5.3
Ad valorem tax benefit in litigation	15.0		15.0
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

Name:	exh_AdValoremTaxExpenseBenefit
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Name:	exh_AdValoremTaxExpenseBenefitApproved
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

Name:	exh_AdValoremTaxExpenseBenefitInLitigation
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

Name:	exh_NumberOfHeavyEquipmentStatuesCasesTriedAndCompletedToWhichEntityIsParty
Namespace Prefix:	exh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	exh_NumberOfStateDistrictCourtCasesInWhichEntityFiledMotionForSummaryJudgment
Namespace Prefix:	exh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionContingentConsiderationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of loss contingency liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LossContingencyInformationAboutLitigationMattersAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration