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v2.4.1.9

Background and Significant Accounting Policies (Details 4) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill |  |  |
Weight assigned to each approach in determining the entity's calculated fair value (as a percent) | 50.00%exh_WeightedPercentageAssignedToEachApproachForValuationOfGoodwill |  |
Goodwill impairment | $ 0 us-gaap_GoodwillImpairmentLoss |  |
Foreign Currency Translation |  |  |
Foreign currency loss | 8,800,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 3,000,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 8,200,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Non-cash losses from foreign currency exchange rate changes on intercompany obligations | 3,614,000 exh_GainLossOnRemeasurementOfIntercompanyBalances | 4,313,000 exh_GainLossOnRemeasurementOfIntercompanyBalances | 7,406,000 exh_GainLossOnRemeasurementOfIntercompanyBalances
Argentina |  |  |
Foreign Currency Translation |  |  |
Loss on investment in US Dollar Denominated Investments | $ 6,500,000 exh_GainLossBeforeTaxOnUSDollarDenominatedInvestments / us-gaap_StatementGeographicalAxis = country_AR |  |

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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