Minimum Hours Per Week Required To Participate In ESPP

No definition available.

Name:	cphc_MinimumHoursPerWeekRequiredToParticipateInEspp
Namespace Prefix:	cphc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Fair Market Value Of Common Stock Purchased At By Employees

+ References

No definition available.

+ Details

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

- Definition

Period After Which Common Stock May Be Purchased By Employees

+ References

No definition available.

+ Details

Name:	cphc_PeriodOfIntervalsAfterWhichCommonStockMayBePurchasedByEmployees
Namespace Prefix:	cphc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period Of Service Required To Be Eligible For KSOP

+ References

No definition available.

+ Details

Name:	cphc_PeriodOfServiceRequiredToBeEligibleForKsop
Namespace Prefix:	cphc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Purchased During Period Shares Employee Stock Purchase Plans

+ References

No definition available.

+ Details

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

- Definition

Stock Repurchased During Period, Price Per Share

+ References

No definition available.

+ Details

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

- Definition

Stock Repurchase Program, Number Of Additional Shares Authorized To Be Repurchased

+ References

No definition available.

+ Details

Name:	cphc_StockRepurchaseProgramNumberOfAdditionalSharesAuthorizedToBeRepurchased
Namespace Prefix:	cphc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

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

- Details

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

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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 (a)(3)

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

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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

-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=27012166&loc=d3e187085-122770

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

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

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

+ Details

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

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

+ Details

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

- Details

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

- Details

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

- Details

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

Stockholders' Equity (Details) (USD $)	12 Months Ended
Stockholders' Equity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Aug. 24, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased, value		$ 7,509
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum hours per week required to participate in ESPP	15 hours
Period of intervals after which common stock may be purchased by employees	3 months
Percentage of fair market value of common stock purchased at by employees	90.00%
Number of shares purchased by employees under Employee Stock Purchase Plan	8,380	7,212
Shares issued for Employee Stock Purchase Plan	268,331
Shares available under plan	350,000
KSOP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of service required to be eligible for KSOP	6 months
Employer contributions to 401(k) plan	154,000	134,000
Stock Repurchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized for repurchase			100,000
Shares repurchased	0	809
Shares repurchased, price per share		$ 9.28
Shares repurchased, value		$ 7,509