XML 80 R66.htm IDEA: XBRL DOCUMENT
v3.6.0.2

LONG TERM DEBT AND CAPITAL LEASES - Components of Long-Term Debt and Capital Leases - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Senior Secured Asset-Backed Credit Facility, Due February 2020; bearing interest at one month LIBOR plus 2.25% |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate |  | 2.25%
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 due December 2044 - fixed rate interest period through 2019; bearing interest at 3.75% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 3.75% | 3.75%
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2 due December 2044 - fixed rate interest period through 2026; bearing interest at 3.125% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 3.125% |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2 due January 2025 - fixed rate interest period through 2017; bearing interest at 6.25% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 6.25% | 6.25%
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015 due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 5.125% | 5.125%
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 due April 2036 - fixed rate interest period through 2018; bearing interest at 4.75% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 4.75% | 4.75%
Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 due April 2029 - fixed rate interest period through 2019; bearing interest at 4.00% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 4.00% | 4.00%
Capital leases maturing through April 2023; bearing interest at up to 7.70% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 7.70% | 7.70%
Notes payable maturing through January 2021; bearing interest at up to 7.00% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 7.00% | 7.00%
Senior Subordinated Notes, Due February 2019; bore interest at 7.75% |  |
Debt Instrument [Line Items] |  |
Debt instrument stated percentage | 7.75% | 7.75%
Unamortized discount | $ 0 | $ 1,372
Revolving Credit Facility due October 2021; bearing interest at LIBOR plus 3.00% | Revolving Credit Facility | Line of Credit |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 3.00% |
Term Loan B Facility due October 2023; bearing interest at LIBOR plus 3.00% | Secured Debt |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 3.00% |
Unamortized discount | $ 1,712 | $ 0

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_SeniorSecuredAssetBasedRevolvingCreditFacilityDueTwoThousandAndTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_RevenueBondsSeriesTwoThousandFourteenDueTwoThousandFortyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_RevenueBondSeriesTwoThousandFourteenRTwoDueTwoThousandFortyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_RevenueBondSeriesTwoThousandFiveRTwoDueTwoThousandTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_RevenueBondsSeriesTwoThousandFifteenDueTwoThousandThirtyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_LongTermRevenueBondSeriesTwoThousandThirteenDueTwoThousandThirtySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_RevenueBondSeriesTwoThousandThirteenDueTwoThousandTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_NotesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_SeniorSubordinatedNotesDueTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cwst_RevolvingCreditFacilitydueOctober2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cwst_TermFacilitydueOctober2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |