XML 121 R82.htm IDEA: XBRL DOCUMENT v2.4.0.8

Fair Value Measurements (Details 2)	3 Months Ended		1 Months Ended
	Jun. 30, 2012 Impaired fleet assets	Jun. 30, 2012 Impaired fleet assets Minimum	Jul. 31, 2013 Long-term receivable from the sale of Canadian Operations
Fair Value Measurements
Period over which fleet assets are to be disposed of		12 months
Weighted average disposal period of impaired assets	4 years
Discount rate (as a percent)	10.40%		13.00%
Settlement period			5 years 6 months

X

- Definition

Represents the settlement period used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	exh_FairValueInputsSettlementPeriod
Namespace Prefix:	exh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average disposal period used to find the present value of an amount to be paid or received in the future as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	exh_FairValueInputsWeightedAverageDisposalPeriod
Namespace Prefix:	exh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The minimum period of time the entity expects it to take to dispose of the impaired long-lived assets.

+ References

No definition available.

+ Details

Name:	exh_LongLivedAssetsToBeDisposedPeriodOfExpectedDispositionMinimum
Namespace Prefix:	exh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration