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Acquisitions - Additional Information (Detail) | 0 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended
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Dec. 15, 2014 Zhongli [Member] USD ($) | Dec. 31, 2014 Zhongli [Member] USD ($) | Dec. 15, 2014 Zhongli [Member] USD ($) | Nov. 30, 2014 Emtrol [Member] USD ($) | Dec. 31, 2014 Emtrol [Member] USD ($) | Nov. 30, 2014 Emtrol [Member] Thirty Trading Days [Member] USD ($) | Sep. 26, 2014 SAT Technology, Inc. ("SAT") [Member] USD ($) | Dec. 31, 2014 SAT Technology, Inc. ("SAT") [Member] USD ($) | Sep. 26, 2014 SAT Technology, Inc. ("SAT") [Member] USD ($) | Aug. 13, 2014 HEE [Member] USD ($) | Dec. 31, 2014 HEE [Member] USD ($) | Aug. 13, 2014 HEE [Member] Thirty Trading Days [Member] USD ($) | Dec. 31, 2014 Aarding Thermal Acoustics B.V. ("Aarding") [Member] USD ($) | Dec. 31, 2013 Aarding Thermal Acoustics B.V. ("Aarding") [Member] USD ($) | Dec. 31, 2014 Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€) | Nov. 30, 2014 Maximum [Member] Emtrol [Member] | Nov. 30, 2014 Minimum [Member] Emtrol [Member] | Aug. 27, 2013 Met-Pro [Member] USD ($) | Dec. 31, 2014 Met-Pro [Member] USD ($) | Aug. 27, 2013 Met-Pro [Member] Maximum [Member] | Aug. 27, 2013 Met-Pro [Member] Minimum [Member] | Dec. 31, 2014 Met-Pro [Member] Minimum [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interests acquired |  |  | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |  |  | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid on acquisition | $ 7,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  | $ 31,900,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  | $ 1,400,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  | $ 7,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  | $ 24,400,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |  |
Earn out payment upon attainment of specified financial targets through December 31, 2015 |  |  | 0 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  |  |  | 2,000,000 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember | 0 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  | 6,700,000 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  | 5,500,000 cece_BusinessAcquisitionContingentConsiderationPotentialCashPayments / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |
Earn out expenses | 17,100,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  |  | 1,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember | 0 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  |  |  | 1,500,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember | 1,300,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |
First year estimated earn-out payable |  |  | 6,100,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  | 300,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  | 700,000 cece_EstimatedEarnOutPayableAsCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |  |  |  |  |  |  |  |
Remainder of estimated earn-out payable |  |  | 11,000,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  |  |  | 700,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  | 1,300,000 cece_EstimatedEarnOutPayableAsNonCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |  |  |  |  |  |  |  |
Revenue contributed |  | 100,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  | 9,800,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  | 1,000,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  | 2,300,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |  |  |  |  |  |  |  |
Net income contributed |  | 0 us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_ZhongliIndustrialTechnologyLtdMember |  |  | 1,300,000 us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  | 0 us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  | 100,000 us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  |  |  |  |  |  |  |  |  |
Company's common stock |  |  |  | 453,858 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  |  |  |  |  | 34,626 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  |  | 763,673 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |  |
Fair value of common stock issued |  |  |  | 5,800,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember |  | 6,000,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_EmtrolLlcMember / us-gaap_TradingActivityByTypeAxis = cece_ThirtyTradingDaysMember |  |  |  | 500,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember |  | 500,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_HeeEnvironmentalEngineeringLlcMember / us-gaap_TradingActivityByTypeAxis = cece_ThirtyTradingDaysMember | 6,800,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |  |
Trading day period |  |  |  | 30 days |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  | 15 days |  |  |
Restrictions on sale or transfer for periods range |  |  |  |  |  |  |  |  |  | 6 months |  |  |  |  |  | 2 years | 1 year |  |  |  |  |
Cash held back |  |  |  |  |  |  |  |  | 200,000 cece_BusinessAcquisitionCashHeldByAcquiredEntity / us-gaap_BusinessAcquisitionAxis = cece_SatTechnologyIncMember |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration paid |  |  |  |  |  |  |  |  |  |  |  |  | 4,900,000 us-gaap_BusinessCombinationContingentConsiderationAsset / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  | 4,000,000 us-gaap_BusinessCombinationContingentConsiderationAsset / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |
Prepaid compensation recognized in Prepaid expenses and other current assets |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember | 1,100,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |
Prepaid compensation recognized in Deferred Charges and other assets |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember | 3,500,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |
Business combination compensation expenses |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 cece_BusinessCombinationRecognizedCompensationExpenses / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember | 900,000 cece_BusinessCombinationRecognizedCompensationExpenses / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |
Earn out expenses included in accounts payable and accrued expenses |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember | 1,300,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cece_AardingThermalAcousticsBvMember |  |  |  |  |  |  |  |
Cash consideration per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13.75 us-gaap_BusinessAcquisitionSharePrice / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |  |
Stock consideration per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13.75 cece_BusinessAcquisitionEquityInterestIssuedOrIssuableCommonSharesParValue / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Exchange ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.0843 cece_CommonStockSharesExchangedForEachShareOfAcquireeCommonStock / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  | 1.3520 cece_CommonStockSharesExchangedForEachShareOfAcquireeCommonStock / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember | 1.0000 cece_CommonStockSharesExchangedForEachShareOfAcquireeCommonStock / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember | 1.0000 cece_CommonStockSharesExchangedForEachShareOfAcquireeCommonStock / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember
Percentage of common stock converted into cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 51.60%cece_PercentageOfCommonSharesOfAcquiredEntitySettledInCash / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Value of shares transferred for cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 104,400,000 cece_CommonStockTransferredForCashValue / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Trading price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12.6814 cece_CommonStockMarketPrice / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Shares of common stock in aggregate stock consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,726,235 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Percentage of cash consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 77.56%cece_PercentageOfHoldingReceivingCashConsideration / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Percentage of stock consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22.44%cece_PercentageOfHoldingReceivingStockConsideration / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Value of stock recorded |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98,000,000 us-gaap_EquityIssuedInBusinessCombinationFairValueDisclosure / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Consideration for cancelling of options and restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,900,000 cece_PaymentsForOptionCancellationsAndRestrictedStockUnits / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |
Proceeds from properties sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,700,000 us-gaap_ProceedsFromSaleOfPropertyHeldForSale / us-gaap_StatementBusinessSegmentsAxis = cece_MetProCorporationMember |  |  |

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Fair value of equity issued in a business combination. + 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 (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- 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 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 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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