XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.19.1

LONG-TERM DEBT - Summary of Components of Long-Term Debt and Capital Leases by Debt Instrument (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 487,802 | $ 555,249
Finance leases maturing through December 2107; bearing interest at a weighted average of 5.3% | 13,504 |
Less—unamortized discount and debt issuance costs | 10,375 | 10,950
Long-term debt and finance leases less unamortized discount and debt issuance costs | 477,427 | 544,299
Less—current maturities of long-term debt and finance leases | 2,694 | 2,298
Non current portion of long term debt and capital lease obligation | $ 474,733 | 542,001
Weighted-average interest rate - finance leases | 5.30% |
Revolving line of credit facility (Revolving Credit Facility) due May 2023; bearing interest at LIBOR plus 2.00% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 0 | $ 69,600
Revolving line of credit facility (Revolving Credit Facility) due May 2023; bearing interest at LIBOR plus 2.00% | LIBOR |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 2.00% | 2.00%
Secured Debt | Term loan A facility (Term Loan Facility) due May 2023; bearing interest at LIBOR plus 2.00% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 350,000 | $ 350,000
Secured Debt | Term loan A facility (Term Loan Facility) due May 2023; bearing interest at LIBOR plus 2.00% | LIBOR |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 2.00% | 2.00%
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 (New York Bonds 2014) due December 2044 - fixed rate interest period through 2019; bearing interest at 3.75% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 25,000 | $ 25,000
Less—unamortized discount and debt issuance costs | $ 801 | $ 847
Stated interest rate | 3.75% | 3.75%
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2 (New York Bonds 2014R-2) due December 2044 - fixed rate interest period through 2026; bearing interest at 3.125% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | $ 15,000
Less—unamortized discount and debt issuance costs | $ 435 | $ 450
Stated interest rate | 3.125% | 3.125%
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-3 (FAME Bonds 2005R-3) due January 2025 - fixed rate interest period through 2025; bearing interest at 5.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 25,000 | $ 25,000
Less—unamortized discount and debt issuance costs | $ 496 | $ 517
Stated interest rate | 5.25% | 5.25%
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-1 (FAME Bonds 2015R-1) due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | $ 15,000
Less—unamortized discount and debt issuance costs | $ 604 | $ 622
Stated interest rate | 5.125% | 5.125%
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-2 (FAME Bonds 2015R-2) due August 2035 - fixed rate interest period through 2025; bearing interest at 4.375% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | $ 15,000
Less—unamortized discount and debt issuance costs | $ 474 | $ 493
Stated interest rate | 4.375% | 4.375%
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 (Vermont Bonds) due April 2036 - fixed rate interest period through 2028; bearing interest at 4.625% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 16,000 | $ 16,000
Less—unamortized discount and debt issuance costs | $ 581 | $ 595
Stated interest rate | 4.625% | 4.625%
Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 (New Hampshire Bonds) due April 2029 - fixed rate interest period through 2019; bearing interest at 4.00% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 11,000 | $ 11,000
Less—unamortized discount and debt issuance costs | $ 276 | $ 308
Stated interest rate | 4.00% | 4.00%
Finance leases maturing through December 2107; bearing interest at a weighted average of 5.3% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease |  | $ 11,248
Weighted average interest rate |  | 5.30%
Notes payable maturing through June 2027; bearing interest at a weighted average of 2.90% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 2,298 | $ 2,401
Weighted average interest rate | 2.90% | 2.90%
Revolving Credit Facility and Term Loan Facility (collectively, the Credit Facility) |  |
Debt Instrument [Line Items] |  |
Less—unamortized discount and debt issuance costs | $ 6,708 | $ 7,118

X
- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Weighted average discount rate for finance lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
Name: | us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer. + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and capital lease obligations including current maturities. + References No definition available. + Details
Name: | us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cwst_TermFacilityDueMay2023TermLoanBFacilityMember
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_FinanceAuthorityofMaineSolidWasteDisposalRevenueBondsSeries2005R3FAMEBonds2005R3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_FinanceAuthorityOfMaineSolidWasteDisposalRevenueBondsSeries2015R1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cwst_FinanceAuthorityOfMaineSolidWasteDisposalRevenueBondsSeries2015R2Member
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_CreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |