Summary Of Significant Accounting Policies Information Of Income Taxes (Details)	Dec. 31, 2012
Percentage the company recognizes the largest amount of benefit that is greater	50

Percentage the company recognizes the largest amount of benefit that is greater

No definition available.

Name:	CSM_PercentageTheCompanyRecognizesTheLargestAmountOfBenefitThatIsGreater
Namespace Prefix:	CSM_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant