XML 100 R74.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Long-Term Debt and Capital Leases - Schedule of Future Maturities of Debt (Detail) (USD $) In Thousands, unless otherwise specified | Apr. 30, 2013
--- | ---
Schedule Of Interest Expenses [Line Items] |
2014 | $ 857
2015 | 328
2016 | 123,410
2017 | 28
2018 |
Thereafter | 369,765
Total | $ 494,388

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalAfterYearFive
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalInYearFive
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total obligation related to long-term debt (excluding convertible debt) and capital leases. + References No definition available. + Details
Name: | cwst_LongTermDebtAndCapitalLeaseObligation
Namespace Prefix: | cwst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | cwst_ScheduleOfInterestExpensesLineItems
Namespace Prefix: | cwst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration