XML 75 R68.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Investments in Non-Consolidated Affiliates (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2012 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2012
Investments in Non-Consolidated Affiliates |  |  |  |  |  |
Initial payment received from the sale of the joint venture | $ 37.6 |  |  |  | $ 37.6 |
Installment payments received from the sale of the joint venture |  | 4.6 | 4.8 | 4.7 |  | 14.1
Expected proceeds from the sale of the joint ventures |  | $ 57 |  |  |  | $ 57
PIGAP II |  |  |  |  |  |
Ownership interest of each equity method investee |  |  |  |  |  |
Ownership Interest (as a percent) |  | 30.00% |  |  |  | 30.00%
El Furrial |  |  |  |  |  |
Ownership interest of each equity method investee |  |  |  |  |  |
Ownership Interest (as a percent) |  | 33.30% |  |  |  | 33.30%

X
- Definition This item represents the amount of additional net sales proceeds expected to be received on disposal of an equity method investment. + References No definition available. + Details
Name: | exh_EquityMethodInvestmentExpectedNetSalesProceeds
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | exh_EquityMethodInvestmentOwnershipInterestOfEquityMethodInvesteeAbstract
Namespace Prefix: | exh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the amount of the initial proceeds received on disposal of an equity method investment. + References No definition available. + Details
Name: | exh_EquityMethodInvestmentSalesProceedsInitialPayment
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the amount of the installment payments received during the period on disposal of an equity method investment. + References No definition available. + Details
Name: | exh_EquityMethodInvestmentSalesProceedsInstallmentPayment
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -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 Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (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. + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration