| **Business Acquisitions, Investments and Redeemable Noncontrolling Interests (Investments) (Details) (USD $)In Thousands, unless otherwise specified** | 0 Months Ended                                                                                                                                                    | 12 Months Ended                                                                                                                                         |
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| **Investment [Line Items]**                                                                                                                            |                                                                                                                                                              |                                                                                                                                                    |   |   |
| Investment in affiliate                                                                                                                                |                                                                                                                                                              | $ 1,073us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates                                                                                     | $ 615us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates | $ 1,023us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates |
| Equity Method Investee [Member]                                                                                                                        |                                                                                                                                                              |                                                                                                                                                    |   |   |
| **Investment [Line Items]**                                                                                                                            |                                                                                                                                                              |                                                                                                                                                    |   |   |
| Equity method investment, ownership percentage                                                                                                         | 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= us-gaap_EquityMethodInvesteeMember |                                                                                                                                                    |   |   |
| Name of Investment                                                                                                                                     | BioProcess H2O LLC                                                                                                                                                |                                                                                                                                                    |   |   |
| Equity method investment, aggregate cost                                                                                                               | 4,000us-gaap_EquityMethodInvestmentAggregateCost/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= us-gaap_EquityMethodInvesteeMember        |                                                                                                                                                    |   |   |
| Equity method investments                                                                                                                              |                                                                                                                                                              | 2,918us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= us-gaap_EquityMethodInvesteeMember          | 3,097us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= us-gaap_EquityMethodInvesteeMember |   |
| Cost-method Investments [Member]                                                                                                                       |                                                                                                                                                              |                                                                                                                                                    |   |   |
| **Investment [Line Items]**                                                                                                                            |                                                                                                                                                              |                                                                                                                                                    |   |   |
| Name of Investment                                                                                                                                     | BioProcess Algae LLC                                                                                                                                              |                                                                                                                                                    |   |   |
| Cost method investment, ownership percentage                                                                                                           | 14.85%clc_CostMethodInvestmentOwnershipPercentage/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember                           |                                                                                                                                                    |   |   |
| Investment in affiliate                                                                                                                                |                                                                                                                                                              | 1,073us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember | 392us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember | 1,114us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember |
| Cost method investments                                                                                                                                |                                                                                                                                                              | 3,277us-gaap_CostMethodInvestments/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember                                | 2,204us-gaap_CostMethodInvestments/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember |   |
| Investment income, dividend                                                                                                                            |                                                                                                                                                              | $ 0us-gaap_InvestmentIncomeDividend/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember                               | $ 0us-gaap_InvestmentIncomeDividend/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember | $ 1,200us-gaap_InvestmentIncomeDividend/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis= us-gaap_CostmethodInvestmentsMember |

| X                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cost Method Investment, Ownership Percentage
+ References
No definition available.
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| X                                                                                                                                                                                                                  |
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| - Definition
Name of Investment
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the aggregate cost of investments 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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of dividend income on nonoperating securities.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).
+ References
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