Represents the Fixed Charge Coverage ratio covenant as defined in the Credit Agreement.

No definition available.

Name:	catm_DebtInstrumentFixedChargeCoverageRatioCovenant
Namespace Prefix:	catm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the Total Net Leverage ratio covenant as defined in the Credit Agreement.

+ References

No definition available.

+ Details

Name:	catm_DebtInstrumentTotalNetLeverageRatioCovenant
Namespace Prefix:	catm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the Total Net Leverage ratio covenant requirement as it relates to restricted payments, as defined in the Credit Agreement.

+ References

No definition available.

+ Details

Name:	catm_DebtInstrumentTotalNetLeverageRatioRelatedToRestrictedPaymentsCovenant
Namespace Prefix:	catm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Accordion Feature, Maximum Borrowing Capacity

+ References

No definition available.

+ Details

Name:	catm_LineofCreditFacilityAccordionFeatureMaximumBorrowingCapacity
Namespace Prefix:	catm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

- 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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: 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(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: 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=6876686&loc=d3e534808-122878

Reference 4: 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=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
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_DebtInstrumentAxis=catm_CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Long-Term Debt - Revolving Credit (Details) - USD ($)	Nov. 19, 2018	Dec. 31, 2019	Sep. 19, 2019	Sep. 18, 2019	Dec. 31, 2018
Long-Term Debt
Long-term debt		$ 739,475,000			$ 818,485,000
Letters of credit outstanding		10,700,000
Revolving Credit Facility
Long-Term Debt
Maximum borrowing capacity		750,000,000.0	$ 750,000,000	$ 600,000,000
Maximum borrowing capacity if accordion feature utilized			$ 850,000,000
Long-term debt		$ 167,227,000			$ 259,081,000
Weighted average interest rate		2.30%			2.80%
Minimum \| Credit Agreement
Long-Term Debt
Interest coverage ratio, debt covenant	3.00
Minimum \| Credit Agreement \| Alternative Base Rate Loans And Canadian Prime Rate Loans
Long-Term Debt
Margin	0.00%
Minimum \| Credit Agreement \| Debt Instruments Bearing Second Specified Variable Interest Rate
Long-Term Debt
Margin	1.00%
Maximum \| Credit Agreement
Long-Term Debt
Total net leverage ratio, debt covenant	4.25
Total net leverage ratio related to restricted payments	3.75
Maximum \| Credit Agreement \| Alternative Base Rate Loans And Canadian Prime Rate Loans
Long-Term Debt
Margin	0.75%
Maximum \| Credit Agreement \| Debt Instruments Bearing Second Specified Variable Interest Rate
Long-Term Debt
Margin	1.75%