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Development Project Charges | 12 Months Ended
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Apr. 30, 2013
Development Project Charges |
16. | DEVELOPMENT PROJECT CHARGES
In the second quarter of fiscal year 2012, we recorded a charge of $131 for deferred costs associated with certain development projects no longer deemed viable. As of April 30, 2013 and 2012, we had $1,644 and $1,163 of deferred costs associated with development projects included in other non-current assets within our consolidated balance sheets.

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- Definition The entire disclosure for the write-off of deferred costs associated with development projects no longer deemed viable. + References No definition available. + Details
Name: | cwst_AbandonedDevelopmentProjectExpenseTextBlock
Namespace Prefix: | cwst_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration