Delayed draw term loans

No definition available.

Name:	kldi_DelayedDrawTermLoans
Namespace Prefix:	kldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Initial term loan borrowing.

+ References

No definition available.

+ Details

Name:	kldi_InitialTermLoanBorrowing
Namespace Prefix:	kldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loans amortize rate .

+ References

No definition available.

+ Details

Name:	kldi_LoansAmortizeRate
Namespace Prefix:	kldi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFloorInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=kldi_TermLoansAndDelayedDrawTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=kldi_TwoThousandNineteenIncentiveAwardPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=kldi_TimeBasedOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=kldi_EmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=kldi_PerformanceOrMarketBasedRestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=kldi_TwoThousandTwentyOneCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=kldi_AdjustedEurocurrencyRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions			1 Months Ended	9 Months Ended	12 Months Ended
	Feb. 16, 2021	Feb. 08, 2021	Feb. 28, 2021	Sep. 30, 2021	Dec. 31, 2019
Subsequent Event [Line Items]
Loss on debt extinguishment				$ (7,257)	$ (7,203)
Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Floor interest rate		1.00%
Subsequent Event [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Floor interest rate		1.00%
2019 Plan [Member] \| Subsequent Event [Member] \| Time-based Options [Member] \| Employees [Member]
Subsequent Event [Line Items]
Stock issued during period additional options issued	1.1
2019 Plan [Member] \| Subsequent Event [Member] \| Performance/Market-based Restricted Stock Units [Member] \| Employees [Member]
Subsequent Event [Line Items]
Stock issued during period shares	0.3
2021 Credit Agreement [Member]
Subsequent Event [Line Items]
Delayed draw term loans		$ 50,000
Debt instrument, maturity description		The Initial Term Loans, Delayed Draw Term Loans and Revolving Credit Loans are each scheduled to mature on the earlier of February 16, 2026 or six months prior to maturity of our Debentures (as defined below) due in December 2024. The Initial Term Loans and Delayed Draw Term Loans may be voluntarily repaid at any time but may be subject to a prepayment premium. The Initial Term Loans and Delayed Draw Term Loans are required to be repaid under certain circumstances, including with Excess Cash Flow (as defined in the 2021 Credit Agreement), the proceeds of an Asset Sale or Casualty Event (each as defined in the 2021 Credit Agreement) and the proceeds of certain refinancing indebtedness.
2021 Credit Agreement [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Debt instrument, net leverage ratio		7.00
2021 Credit Agreement [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Debt instrument, net leverage ratio		1.00
2021 Credit Agreement [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loans amortize rate		1.00%
2021 Credit Agreement [Member] \| Adjusted Eurocurrency Rate [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loan variable interest rate		6.50%
2021 Credit Agreement [Member] \| Base Rate [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loan variable interest rate		5.50%
2021 Credit Agreement [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Revolving credit loans		$ 40,000
2021 Credit Agreement [Member] \| Revolving Credit Facility [Member] \| Adjusted Eurocurrency Rate [Member]
Subsequent Event [Line Items]
Loan variable interest rate		4.00%
2021 Credit Agreement [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Subsequent Event [Line Items]
Loan variable interest rate		3.00%
2021 Credit Agreement [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Initial term loan borrowing		$ 300,000
Delayed draw term loans		$ 50,000
Debt instrument, maturity description		The Initial Term Loans, Delayed Draw Term Loans and Revolving Credit Loans are each scheduled to mature on the earlier of February 16, 2026 and or six months prior to maturity of our Debentures due in December 2024. The Initial Term Loans and Delayed Draw Term Loans may be voluntarily repaid at any time, but may be subject to a prepayment premium. The Initial Term Loans and Delayed Draw Term Loans are required to be repaid under certain circumstances, including with Excess Cash Flow (as defined in the 2021 Credit Agreement), the proceeds of an Asset Sale or Casualty Event (each as defined in the 2021 Credit Agreement) and the proceeds of certain refinancing indebtedness.
Debt instrument, closing fees		$ 8,000
Loss on debt extinguishment			$ (7,200)
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Debt instrument, net leverage ratio		7.00
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Debt instrument, net leverage ratio		1.00
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loans amortize rate		1.00%
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Adjusted Eurocurrency Rate [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loan variable interest rate		6.50%
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Base Rate [Member] \| Term Loans and Delayed Draw Term Loans [Member]
Subsequent Event [Line Items]
Loan variable interest rate		5.50%
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Revolving credit loans		$ 40,000
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member] \| Adjusted Eurocurrency Rate [Member]
Subsequent Event [Line Items]
Loan variable interest rate		4.00%
2021 Credit Agreement [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Subsequent Event [Line Items]
Loan variable interest rate		3.00%