CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
Nov. 30, 2019	Nov. 30, 2018
STATEMENTS OF EQUITY
Change in funded status of pension plans, tax	$ 44	$ 83
Net unrealized gain (loss) on restricted investments, tax	$ 14	$ (7)

Represents the amount of tax expense (benefit) of change in funded status of pension plan.

No definition available.

Name:	ccf_OtherComprehensiveIncomeLossChangeInFundedStatusOfPensionPlanTax
Namespace Prefix:	ccf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration