XML 29 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 Significant Other Observable Inputs (Level 2) Recurring basis | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Recurring basis | Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Nonrecurring basis | Sep. 30, 2012 Significant Unobservable Inputs (Level 3) Nonrecurring basis
--- | --- | --- | --- | ---
Summarizes the valuation of interest rate swaps and impaired assets |  |  |  |
Interest rate swaps liability | $ (4,604) | $ (9,916) |  |
Impaired long-lived assets |  |  | 5,508 | 32,355
Impaired long-lived assets-Discontinued operations |  |  |  | 1,959
Long-term receivable from the sale of Canadian Operations |  |  | $ 7,556 |

X
- Definition Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year related to discontinued operations fair value disclosure. + References No definition available. + Details
Name: | exh_LongLivedAssetDiscontinuedOperationsImpairmentFairValueDisclosure
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Represents the fair value portion of long -term receivable from sale of discontinued operation. + References No definition available. + Details
Name: | exh_LongTermReceivableFromSaleOfDiscontinuedOperationsFairValueDisclosure
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 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