| **Derivative Instruments and Hedging - Additional Information (Details) - Foreign Exchange Contract [Member] - USD ($) $ in Thousands** | 9 Months Ended |           |
|-----------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------|
||
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                    |           |      |   |
| Notional amount                                                                                                                         | $ 2,491        |      | $ 7,212 |
| Not Designated as Hedging Instrument [Member]                                                                                           |           |      |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                    |           |      |   |
| Notional amount                                                                                                                         | 25,760         |      | 36,259 |
| Gain (loss) on forward currency contracts                                                                                               | 6,341          | $ 641     |   |
| Gain (loss) on translation of underlying inter-company advances                                                                         | (5,869)        | $ (1,638) |   |
| Fair Value Hedging [Member]                                                                                                             |           |      |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                    |           |      |   |
| Notional amount                                                                                                                         | 4,076          |      | 5,326 |
| Fair Value Hedging [Member] | Not Designated as Hedging Instrument [Member]                                                             |           |      |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                    |           |      |   |
| Notional amount                                                                                                                         | 43,008         |      | 48,797 |
| Cash Flow Hedging [Member]                                                                                                              |           |      |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                    |           |      |   |
| Notional amount                                                                                                                         | $ 10,681       |      | $ 0 |

| X                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Gain Loss on Translation of Underlying Intercompany Advances Not Designated as Hedging Instruments
+ References
No definition available.
+ Details**Name:**clc_GainLossonTranslationofUnderlyingIntercompanyAdvancesNotDesignatedasHedgingInstruments**Namespace Prefix:**clc_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B
+ Details**Name:**invest_DerivativeNotionalAmount**Namespace Prefix:**invest_**Data Type:**xbrli:monetaryItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
+ Details**Name:**us-gaap_DerivativeInstrumentsGainLossLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959
+ Details**Name:**us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |