NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	Mar. 31, 2015 country
Minimum
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of Countries in which Entity Operates	80
Maximum
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Ownership interest in other affiliates to be accounted for at cost (as a percent)	20.00%

Represents the percentage of ownership interest in the investee accounted for under the cost method of accounting.

No definition available.

Name:	chmt_CostMethodInvestmentsOwnershipPercentage
Namespace Prefix:	chmt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant