Incentive Plans and Stock-Based Compensation (Employee Stock Purchase Plan) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company stock issued under the plan	$ 6,808	$ 3,209	$ 2,488
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company stock issued under the plan	$ 1,225	$ 1,498	$ 1,338

Aggregate value of stock related to (1) Restricted Stock Awards issued during the period, (2) Aggregate change in value for stock issued during the period as a result of Employee Stock Purchase Plan and (3) Value of stock issued during the period as a result of any Share-Based Compensation plan other than an employee stock ownership plan (ESOP).

No definition available.

Name:	clc_StockIssuedDuringPeriodValueRestrictedStockAwardAndEmployeeStockPurchasePlanAndShareBasedCompensation
Namespace Prefix:	clc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration