Cooperative Marketing Agreement (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended
Jun. 14, 2012	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Obligation under the Agreement to enhance purses for live horse racing meet due current		$ 6,200,000	$ 5,300,000
Amount received under agreement for joint marketing activities		944,000	660,000
Revenues related to marketing payment		65,000cphc_RevenuesRelatedToMarketingPayment	59,000cphc_RevenuesRelatedToMarketingPayment
Advertising and marketing expenses related to marketing payment		8,000cphc_ExpensesRelatedToMarketingPayment	6,000cphc_ExpensesRelatedToMarketingPayment
Depreciation related to marketing payment		57,000	53,000
Stock based compensation expense		75,000	60,000
Expense recorded as an offset to revenue		9,881,038us-gaap_Revenues	9,374,454us-gaap_Revenues
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, other than options granted	165,000
Benefit from appreciation in the value of common stock, per share	$ 14.30
Number of shares of stock each right represents	1
Percentage of the Rights vested	10.00%
Number of the Rights vested	16,500	66,000
Number of remaining Rights vest per year	16,500
Stock based compensation expense		83,000	91,000
Expense recorded as an offset to revenue		83,000	59,000
Other operating expense related to stock appreciation rights			$ 32,000

Amount received under agreement for joint marketing activities.

No definition available.

Name:	cphc_AmountReceivedUnderAgreementForJointMarketingActivities
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Benefit from appreciation in the value of common stock, per share

+ References

No definition available.

+ Details

Name:	cphc_BenefitFromAppreciationInValueOfCommonStockPerShare
Namespace Prefix:	cphc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Depreciation related to marketing payment.

+ References

No definition available.

+ Details

Name:	cphc_DepreciationRelatedToMarketingPayment
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Expenses related to marketing payment

+ References

No definition available.

+ Details

Name:	cphc_ExpensesRelatedToMarketingPayment
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of remaining Rights vest per year

+ References

No definition available.

+ Details

Name:	cphc_NumberOfRemainingRightsVestPerYear
Namespace Prefix:	cphc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of the Rights vested

+ References

No definition available.

+ Details

Name:	cphc_NumberOfRightsVested
Namespace Prefix:	cphc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Shares Of Stock Each Right Represents

+ References

No definition available.

+ Details

Name:	cphc_NumberOfSharesOfStockEachRightRepresents
Namespace Prefix:	cphc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Obligation under the Agreement to enhance purses for live horse racing meet due current

+ References

No definition available.

+ Details

Name:	cphc_ObligationUnderAgreementToEnhancePursesForLiveHorseRacingMeetDueCurrent
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Other operating expense related to stock appreciation rights

+ References

No definition available.

+ Details

Name:	cphc_OtherOperatingExpenseRelatedToStockAppreciationRights
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of the Rights vested

+ References

No definition available.

+ Details

Name:	cphc_PercentageOfRightsVested
Namespace Prefix:	cphc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenues related to marketing payment

+ References

No definition available.

+ Details

Name:	cphc_RevenuesRelatedToMarketingPayment
Namespace Prefix:	cphc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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

- Details

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

- Details

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