XML 38 R75.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 Significant Other Observable Inputs (level 2) Recurring basis | Dec. 31, 2011 Significant Other Observable Inputs (level 2) Recurring basis | Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Nonrecurring basis | Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Nonrecurring basis
Summarizes the valuation of interest rate swaps and impaired assets |  |  |  |  |
Interest rate swaps asset (liability) |  | $ (9,916) | $ (19,446) |  |
Impaired long-lived assets |  |  |  | $ 35,654 | $ 1,463
Weighted average disposal period of impaired fleet assets | 4 years |  |  |  |
Weighted average discount rate of expected proceeds on impaired fleet assets (as a percent) | 10.40% |  |  |  |
Disposition of impaired fleet assets minimum time required | 12 months |  |  |  |

X
- Definition The minimum period of time required to dispose of fleet assets that the entity impaired. + References No definition available. + Details
Name: | exh_DispositionOfFleetAssetsMinimumTimeRequired
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 Long-lived asset impairment fair value disclosure. + References No definition available. + Details
Name: | exh_LongLivedAssetImpairmentFairValueDisclosure
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract
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=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration