XML 22 R37.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Other Commitments and Contingencies (Details Textual) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2012 Pipeline | Dec. 31, 2011
Other Commitments and Contingencies (Additional Textual) [Abstract] |  |
Aggregate litigation expense legal cost | $ 978,000 |
Litigation expense | 440,000 |
Contract expiration date of natural gas transportation and storage | Mar. 31, 2013 |
Contracts expiration related to natural gas purchase | 2013-05 |
Total liabilities to tangible net worth minimum times | 3.75 |
Fixed charge coverage ratio minimum times | 1.5 |
Time to cure ratio | 30 days |
Funds from operations interest coverage ratio minimum times | 2 |
Total debt to capital maximum | 0.65 |
Maximum authorized liability under such guarantees and letters of credit | 45,000,000 |
Aggregate guaranteed amount | 27,700,000 |
Guarantees expiring date | through June 2013 |
Renewed letter of credit amount to our former primary insurance company | 725,000 |
Expiry date of renewed letter of credit to our former primary insurance company | Jun. 01, 2013 |
Drawn amount on all letter of credit | 0 |
Transportation service contract provided for a term of number of years | 15 years |
Number of interstate upstream pipelines | 3 |
Accruals related to additional sales taxes and gross receipts taxes | 173,000 | 307,000
Estimation of proportionate share pre service cost | 25,500,000 |
Delaware Division [Member] |  |
Other Commitments and Contingencies (Textual) [Abstract] |  |
Additional volume subscribed | 34,100 |
Maryland Division [Member] |  |
Other Commitments and Contingencies (Textual) [Abstract] |  |
Additional volume subscribed | 15,900 |
Letter of Credit One [Member] |  |
Other Commitments and Contingencies (Textual) [Abstract] |  |
Letter of credit amount | 1,000,000 |
Issued letter of credit expiry date | Sep. 12, 2012 |
Letter of Credit Two [Member] |  |
Other Commitments and Contingencies (Textual) [Abstract] |  |
Issued letter of credit expiry date | Dec. 02, 2012 |
Amount of letter of credit to our current primary insurance company | 656,000 |
TETLP [Member] |  |
Other Commitments and Contingencies (Textual) [Abstract] |  |
Provided a letter of credit amount to TETLP related to the Precedent Agreement with TETLP | 2,500,000 |
Expected TETLP's mainline system expansion | 190,000 |
Number of transportation service contract | 2 |
Proportionate share of TETLP's pre-service costs | 25,500,000 |
Proportionate share of TETLPs pre-service costs after TETLP completed its construction of all facilities | $ 50,000,000 |

X
- Definition Additional volume subscribed. + References No definition available. + Details
Name: | cpk_AdditionalVolumeSubscribed
Namespace Prefix: | cpk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate litigation expense legal cost till date. + References No definition available. + Details
Name: | cpk_AggregateLitigationExpenseLegalCostTillDate
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expiration date of contract one. + References No definition available. + Details
Name: | cpk_ExpirationDateOfContractOne
Namespace Prefix: | cpk_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiration date of contract two. + References No definition available. + Details
Name: | cpk_ExpirationDateOfContractTwo
Namespace Prefix: | cpk_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guaranteed amount on electric transmission. + References No definition available. + Details
Name: | cpk_GuaranteedAmountOnElectricTransmission
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Guaranteed amount on primary insurance. + References No definition available. + Details
Name: | cpk_GuaranteedAmountOnPrimaryInsurance
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Guarantees expiring date. + References No definition available. + Details
Name: | cpk_GuaranteesExpiringDate
Namespace Prefix: | cpk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of credit facility provided. + References No definition available. + Details
Name: | cpk_LineOfCreditFacilityProvided
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum authorized amount under corporate guarantees and letters of credit. + References No definition available. + Details
Name: | cpk_MaximumAuthorizedAmountUnderCorporateGuaranteesAndLettersOfCredit
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum days to make default good. + References No definition available. + Details
Name: | cpk_MaximumDaysToMakeDefaultGood
Namespace Prefix: | cpk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum debt to net capital ratio under agreement two. + References No definition available. + Details
Name: | cpk_MaximumDebtToNetCapitalRatioUnderAgreementTwo
Namespace Prefix: | cpk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum expected expansion in mainline systems. + References No definition available. + Details
Name: | cpk_MaximumExpectedExpansionInMainlineSystems
Namespace Prefix: | cpk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum liabilities to tangible net worth ratio under agreement one. + References No definition available. + Details
Name: | cpk_MaximumLiabilitiesToTangibleNetWorthRatioUnderAgreementOne
Namespace Prefix: | cpk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum fixed charge coverage ratio under agreement one. + References No definition available. + Details
Name: | cpk_MinimumFixedChargeCoverageRatioUnderAgreementOne
Namespace Prefix: | cpk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum interest coverage ratio under agreement two. + References No definition available. + Details
Name: | cpk_MinimumInterestCoverageRatioUnderAgreementTwo
Namespace Prefix: | cpk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of interstate upstream pipelines. + References No definition available. + Details
Name: | cpk_NumberOfInterstateUpstreamPipelines
Namespace Prefix: | cpk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of transportation service contracts. + References No definition available. + Details
Name: | cpk_NumberOfTransportationServiceContracts
Namespace Prefix: | cpk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cpk_OtherCommitmentsAndContingenciesAdditionalTextualAbstract
Namespace Prefix: | cpk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cpk_OtherCommitmentsAndContingenciesTextualAbstract
Namespace Prefix: | cpk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period specified in firm transportation service contract. + References No definition available. + Details
Name: | cpk_PeriodSpecifiedInFirmTransportationServiceContract
Namespace Prefix: | cpk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from renewed lines of credit. + References No definition available. + Details
Name: | cpk_ProceedsFromRenewedLinesOfCredit
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proportionate pre-service costs. + References No definition available. + Details
Name: | cpk_ProportionatePreServiceCosts
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Proportionate pre-service costs after completing construction of all facilities. + References No definition available. + Details
Name: | cpk_ProportionatePreServiceCostsAfterCompletingConstructionOfAllFacilities
Namespace Prefix: | cpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Renewed line of credit facility expiration date one. + References No definition available. + Details
Name: | cpk_RenewedLineOfCreditFacilityExpirationDateOne
Namespace Prefix: | cpk_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5 + Details
Name: | us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the expenses incurred by the entity which are directly related and attributable to receiving an award in settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 + Details
Name: | us-gaap_SalesAndExciseTaxPayableCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant