v3.6.0.2

Earnings Per Share and Stock Repurchase Activity (Narrative) (Details) - USD ($) | Jun. 27, 2016 | Dec. 03, 2016
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Earnings Per Share and Stock Repurchase Activity [Abstract] |  |
Stock repurchase program, authorized amount | $ 250,000,000 |
Stock repurchase program, period in force | 3 years |
Stock repurchase program, remaining authorized repurchase amount |  | $ 219,338,000

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- Definition Earnings Per Share and Stock Repurchase Activity + References No definition available. + Details
Name: | clc_EarningsPerShareAndStockRepurchaseActivityAbstract
Namespace Prefix: | clc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant