Name:	cap_CapitalLeasesNetInvestmentInCapitalLeaseObligationsFairValueDisclosure
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of net investment in direct finance leases at the balance sheet date.

No definition available.

Name:	cap_CapitalLeasesNetInvestmentInDirectFinancingLeasesFairValueDisclosure
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Collateralized Financing Obligations, At Carrying Value

No definition available.

Name:	cap_CollateralizedFinancingObligationsAtCarryingValue
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This line item represents the fair value equal to the present value (the principal).

No definition available.

Name:	cap_CollateralizedFinancingObligationsFairValueDisclosure
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The fair value as of the balance sheet date of the noncurrent portion of an asset-backed long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount.

No definition available.

Name:	cap_LongTermAssetBackedLineOfCreditFacilityFairValueDisclosure
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The fair value as of the balance sheet date of the noncurrent portion of an senior secured notes.

No definition available.

Name:	cap_SeniorSecuredNotesFairValueDisclosure
Namespace Prefix:	cap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Line-of-Credit Arrangement

-URI http://asc.fasb.org/extlink&oid=6517033

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

Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

No definition available.

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

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

Reference 6: 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