$CPK
CHESAPEAKE UTILITIES CORP Stock $cpk

$cpk Overview Financials Valuation SEC Filings Company Website

2015 Q4 Form 10-K Financial Statement

#000162828017001844 Filed on February 28, 2017

Income Statement

Concept	2015 Q4	2015 Q3	2015 Q2
Revenue	$104.6M	$91.91M	$92.68M
YoY Change	-13.14%	0.32%	-7.78%
Cost Of Revenue	$45.20M	$41.10M	$41.40M
YoY Change	-28.71%	-10.65%	-22.03%
Gross Profit	$59.40M	$50.80M	$51.30M
YoY Change	4.21%	11.4%	8.23%
Gross Profit Margin	56.81%	55.27%	55.35%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.800M	$7.636M	$7.543M
YoY Change	25.81%	12.73%	11.98%
% of Gross Profit	13.13%	15.03%	14.7%
Operating Expenses	$43.20M	$81.00M	$79.51M
YoY Change	14.59%	-3.37%	-11.69%
Operating Profit	$16.17M	$10.91M	$13.17M
YoY Change	30.33%	40.0%	25.94%
Interest Expense	-$2.600M	$2.492M	$2.485M
YoY Change	4.0%	-0.12%	7.9%
% of Operating Profit	-16.08%	22.84%	18.87%
Other Income/Expense, Net	$300.0K	$36.00K	-$171.0K
YoY Change	-200.0%	-212.5%	-142.22%
Pretax Income	$13.90M	$8.453M	$10.51M
YoY Change	-16.77%	60.55%	22.84%
Income Tax	$5.300M	$3.334M	$4.220M
% Of Pretax Income	38.13%	39.44%	40.14%
Net Earnings	$8.619M	$5.119M	$6.294M
YoY Change	-14.64%	60.97%	22.59%
Net Earnings / Revenue	8.24%	5.57%	6.79%
Basic Earnings Per Share	$0.56	$0.34	$0.41
Diluted Earnings Per Share	$0.56	$0.33	$0.41
COMMON SHARES
Basic Shares Outstanding	15.27M shares	15.26M shares	15.24M shares
Diluted Shares Outstanding		15.31M shares	15.28M shares

Balance Sheet

Concept	2015 Q4	2015 Q3	2015 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.900M	$3.800M	$2.100M
YoY Change	-36.96%	65.22%	-16.0%
Cash & Equivalents	$2.855M	$3.781M	$2.104M
Short-Term Investments
Other Short-Term Assets	$1.044M	$339.0K	$285.0K
YoY Change	435.38%	68.66%	40.39%
Inventory	$13.80M	$12.20M	$11.00M
Prepaid Expenses	$7.146M	$7.507M	$4.223M
Receivables	$41.01M	$39.86M	$42.27M
Other Receivables	$24.90M	$6.900M	$2.500M
Total Short-Term Assets	$111.7M	$87.69M	$78.52M
YoY Change	-8.72%	-0.73%	-2.36%
LONG-TERM ASSETS
Property, Plant & Equipment	$855.0M	$819.2M	$790.4M
YoY Change	23.95%	20.57%	19.64%
Goodwill	$14.55M	$16.05M	$16.05M
YoY Change	193.78%	246.98%	246.98%
Intangibles	$2.222M	$2.317M	$2.415M
YoY Change	-7.57%	-13.38%	-12.97%
Long-Term Investments	$3.600M	$3.400M	$3.700M
YoY Change	-2.7%	-2.86%	5.71%
Other Assets	$77.50M	$77.30M	$77.70M
YoY Change	-0.77%	16.77%	17.19%
Total Long-Term Assets	$955.7M	$920.8M	$892.1M
YoY Change	22.2%	21.28%	20.45%
TOTAL ASSETS
Total Short-Term Assets	$111.7M	$87.69M	$78.52M
Total Long-Term Assets	$955.7M	$920.8M	$892.1M
Total Assets	$1.067B	$1.008B	$970.6M
YoY Change	18.02%	18.98%	18.21%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$39.30M	$41.13M	$38.17M
YoY Change	-11.9%	23.25%	26.47%
Accrued Expenses	$18.40M	$21.60M	$16.50M
YoY Change	2.22%	0.0%	-1.79%
Deferred Revenue
YoY Change
Short-Term Debt	$173.4M	$127.1M	$94.71M
YoY Change	96.53%	78.58%	97.85%
Long-Term Debt Due	$9.151M	$9.139M	$9.127M
YoY Change	0.46%	-17.76%	-17.9%
Total Short-Term Liabilities	$279.6M	$236.9M	$199.6M
YoY Change	43.95%	40.1%	42.56%
LONG-TERM LIABILITIES
Long-Term Debt	$149.0M	$155.9M	$156.2M
YoY Change	-5.98%	-5.53%	-5.52%
Other Long-Term Liabilities	$2.597M	$3.130M	$3.820M
YoY Change	-32.1%	-17.09%	9.42%
Total Long-Term Liabilities	$151.6M	$159.0M	$160.1M
YoY Change	-6.6%	-5.79%	-5.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$279.6M	$236.9M	$199.6M
Total Long-Term Liabilities	$151.6M	$159.0M	$160.1M
Total Liabilities	$431.2M	$395.9M	$359.7M
YoY Change	20.94%	17.17%	16.45%
SHAREHOLDERS EQUITY
Retained Earnings	$166.2M	$162.0M	$161.3M
YoY Change	16.81%	18.98%	15.78%
Common Stock	$197.7M	$196.8M	$195.3M
YoY Change	20.81%	21.08%	22.58%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.883M	$1.863M	$1.843M
YoY Change	49.68%	53.08%	53.33%
Treasury Stock Shares
Shareholders Equity	$358.1M	$353.3M	$351.2M
YoY Change
Total Liabilities & Shareholders Equity	$1.067B	$1.008B	$970.6M
YoY Change	18.02%	18.98%	18.21%

Cashflow Statement

Concept	2015 Q4	2015 Q3	2015 Q2
OPERATING ACTIVITIES
Net Income	$8.619M	$5.119M	$6.294M
YoY Change	-14.64%	60.97%	22.59%
Depreciation, Depletion And Amortization	$7.800M	$7.636M	$7.543M
YoY Change	25.81%	12.73%	11.98%
Cash From Operating Activities	$10.80M	$13.50M	$18.10M
YoY Change	-24.48%	110.94%	43.65%
INVESTING ACTIVITIES
Capital Expenditures	-$46.30M	-$39.90M	-$31.90M
YoY Change	64.77%	52.29%	30.74%
Acquisitions
YoY Change
Other Investing Activities	$0.00	$100.0K	-$21.10M
YoY Change	-100.0%		-5375.0%
Cash From Investing Activities	-$46.30M	-$39.90M	-$53.00M
YoY Change	158.66%	52.29%	120.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	34.60M	28.10M	20.80M
YoY Change	496.55%	43.37%	126.09%
NET CHANGE
Cash From Operating Activities	10.80M	13.50M	18.10M
Cash From Investing Activities	-46.30M	-39.90M	-53.00M
Cash From Financing Activities	34.60M	28.10M	20.80M
Net Change In Cash	-900.0K	1.700M	-14.10M
YoY Change	-140.91%	-950.0%	540.91%
FREE CASH FLOW
Cash From Operating Activities	$10.80M	$13.50M	$18.10M
Capital Expenditures	-$46.30M	-$39.90M	-$31.90M
Free Cash Flow	$57.10M	$53.40M	$50.00M
YoY Change	34.67%	63.8%	35.14%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2015Q4	cpk	Accrued Revenue AccruedRevenue	12452000	USD
CY2016Q4	cpk	Accrued Revenue AccruedRevenue	16986000	USD
CY2016Q4	cpk	Accumulated Other Comprehensive Income Loss Tax Effect AccumulatedOtherComprehensiveIncomeLossTaxEffect	3500000	USD
CY2016	cpk	Amortization Of Pre Merger Regulatory Asset AmortizationOfPreMergerRegulatoryAsset	769000	USD
CY2016Q4	cpk	Annual Estimate Of Volume Of Propane To Be Purchased AnnualEstimateOfVolumeOfPropaneToBePurchased	3400000	gal
CY2013Q2	cpk	Cpk Base Rate Filing Period CPK_BaseRateFilingPeriod	P2Y6M
CY2014	cpk	Capital Expenditure CapitalExpenditure	98057000	USD
CY2015	cpk	Capital Expenditure CapitalExpenditure	142713000	USD
CY2016	cpk	Capital Expenditure CapitalExpenditure	169376000	USD
CY2016Q4	cpk	Common Stock Equity To Total Capitalization CommonStockEquityToTotalCapitalization	0.4
CY2016	cpk	Companys Exposure In Number Of Former Manufactured Gas Plant Sites CompanysExposureInNumberOfFormerManufacturedGasPlantSites	7	site
CY2016Q4	cpk	Cpk Commonstockownershippercentage Cpk_commonstockownershippercentage	0.15
CY2016Q4	cpk	Cumulative Consolidated Net Income CumulativeConsolidatedNetIncome	329400000	USD
CY2016Q4	cpk	Debt Instrument Restrictive Covenants Required Net Book Valueof Regulated Business Assets Percentageof Consolidated Total Assets DebtInstrumentRestrictiveCovenantsRequiredNetBookValueofRegulatedBusinessAssetsPercentageofConsolidatedTotalAssets	0.5
CY2016Q4	cpk	Deferrals Rates After Deferral Period Ends Minimum DeferralsRatesAfterDeferralPeriodEndsMinimum	0.01
CY2015Q4	cpk	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	100764000	USD
CY2016Q4	cpk	Deferred Charges And Other Assets DeferredChargesAndOtherAssets	101404000	USD
CY2016	cpk	Deferred Compensation Employer Matching Contribution Rate DeferredCompensationEmployerMatchingContributionRate	0.06
CY2015Q4	cpk	Deferred Income Tax On Acquisition Adjustment DeferredIncomeTaxOnAcquisitionAdjustment	15490000	USD
CY2016Q4	cpk	Deferred Income Tax On Acquisition Adjustment DeferredIncomeTaxOnAcquisitionAdjustment	14840000	USD
CY2016	cpk	Deferred Revenue Refund Payment Period DeferredRevenueRefundPaymentPeriod	P1Y
CY2015Q4	cpk	Deferred Tax Asset Self Insurance Accruals DeferredTaxAssetSelfInsuranceAccruals	278000	USD
CY2016Q4	cpk	Deferred Tax Asset Self Insurance Accruals DeferredTaxAssetSelfInsuranceAccruals	189000	USD
CY2015Q4	cpk	Deferred Tax Assets Environmental DeferredTaxAssetsEnvironmental	2445000	USD
CY2016Q4	cpk	Deferred Tax Assets Environmental DeferredTaxAssetsEnvironmental	2592000	USD
CY2015Q4	cpk	Deferred Tax Liabilities Loss On Reacquired Debt DeferredTaxLiabilitiesLossOnReacquiredDebt	683000	USD
CY2016Q4	cpk	Deferred Tax Liabilities Loss On Reacquired Debt DeferredTaxLiabilitiesLossOnReacquiredDebt	1846000	USD
CY2015Q4	cpk	Defined Benefit Plan Alternative Investments Fair Valueof Plan Assets DefinedBenefitPlanAlternativeInvestmentsFairValueofPlanAssets	6457000	USD
CY2016Q4	cpk	Defined Benefit Plan Alternative Investments Fair Valueof Plan Assets DefinedBenefitPlanAlternativeInvestmentsFairValueofPlanAssets	6233000	USD
CY2015Q4	cpk	Defined Benefit Plan Fair Valueof Plan Assets Excluding Net Asset Value Investments DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments	44502000	USD
CY2016Q4	cpk	Defined Benefit Plan Fair Valueof Plan Assets Excluding Net Asset Value Investments DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments	45707000	USD
CY2016Q4	cpk	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	3	plan
CY2016Q4	cpk	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	2
CY2016Q4	cpk	Defined Benefit Plan Post Merger Regulatory Assets DefinedBenefitPlanPostMergerRegulatoryAssets	16282000	USD
CY2016Q4	cpk	Defined Benefit Plan Pre Merger Regulatory Assets DefinedBenefitPlanPreMergerRegulatoryAssets	2095000	USD
CY2016Q4	cpk	Defined Benefit Plan Regulatory Assets Before Premerger DefinedBenefitPlanRegulatoryAssetsBeforePremerger	25151000	USD
CY2016	cpk	Defined Contribution Plan Eligibility Threshold Requisite Service Period DefinedContributionPlanEligibilityThresholdRequisiteServicePeriod	P3M
CY2016	cpk	Defined Contribution Plan Maximum Employer Contribution As Percentage Of Eligible Compensation DefinedContributionPlanMaximumEmployerContributionAsPercentageOfEligibleCompensation	1
CY2014	cpk	Depreciation And Accretion Included In Other Costs DepreciationAndAccretionIncludedInOtherCosts	6577000	USD
CY2015	cpk	Depreciation And Accretion Included In Other Costs DepreciationAndAccretionIncludedInOtherCosts	6978000	USD
CY2016	cpk	Depreciation And Accretion Included In Other Costs DepreciationAndAccretionIncludedInOtherCosts	7334000	USD
CY2014	cpk	Dividends Share Based Compensation Dividends And Dividends For Reinvestment Plan DividendsShareBasedCompensationDividendsAndDividendsForReinvestmentPlan	15675000	USD
CY2015	cpk	Dividends Share Based Compensation Dividends And Dividends For Reinvestment Plan DividendsShareBasedCompensationDividendsAndDividendsForReinvestmentPlan	17222000	USD
CY2016	cpk	Dividends Share Based Compensation Dividends And Dividends For Reinvestment Plan DividendsShareBasedCompensationDividendsAndDividendsForReinvestmentPlan	18848000	USD
CY2016	cpk	Employee Deferral Rate EmployeeDeferralRate	0.8
CY2016	cpk	Employee Minimum Age To Participate Under Defined Contribution Plan EmployeeMinimumAgeToParticipateUnderDefinedContributionPlan	P55Y
CY2016	cpk	Expected Amortization Of Pre Merger Regulatory Asset ExpectedAmortizationOfPreMergerRegulatoryAsset	0	USD
CY2016Q4	cpk	Line Of Credit Facility Maximum Borrowing Committed Capacity LineOfCreditFacilityMaximumBorrowingCommittedCapacity	170000000	USD
CY2015Q4	cpk	Longterm Debtand Capital Lease Obligations Netof Current Maturities LongtermDebtandCapitalLeaseObligationsNetofCurrentMaturities	149006000	USD
CY2016Q4	cpk	Longterm Debtand Capital Lease Obligations Netof Current Maturities LongtermDebtandCapitalLeaseObligationsNetofCurrentMaturities	136954000	USD
CY2016	cpk	Maturity Period To Be Considered Cash Equivalents MaturityPeriodToBeConsideredCashEquivalents	3
CY2016	cpk	Maximum Authorized Amount Under Corporate Guarantees And Letters Of Credit MaximumAuthorizedAmountUnderCorporateGuaranteesAndLettersOfCredit	65000000	USD
CY2016	cpk	Maximum Days To Make Default Good MaximumDaysToMakeDefaultGood	P30D
CY2016Q4	cpk	Maximum Debt To Net Capital Ratio Under Agreement Two MaximumDebtToNetCapitalRatioUnderAgreementTwo	65
CY2016Q4	cpk	Maximum Liabilities To Tangible Net Worth Ratio Under Agreement One MaximumLiabilitiesToTangibleNetWorthRatioUnderAgreementOne	3.75
CY2016Q4	cpk	Minimum Fixed Charge Coverage Ratio Under Agreement One MinimumFixedChargeCoverageRatioUnderAgreementOne	1.5
CY2016Q4	cpk	Minimum Interest Coverage Ratio Under Agreement Two MinimumInterestCoverageRatioUnderAgreementTwo	2
CY2014	cpk	Non Cash Performance Incentive Plan Expenses NonCashPerformanceIncentivePlanExpenses	1533000	USD
CY2015	cpk	Non Cash Performance Incentive Plan Expenses NonCashPerformanceIncentivePlanExpenses	1594000	USD
CY2016	cpk	Non Cash Performance Incentive Plan Expenses NonCashPerformanceIncentivePlanExpenses	1027000	USD
CY2014	cpk	Non Cash Retirement Savings Plan Expenses NonCashRetirementSavingsPlanExpenses	602000	USD
CY2015	cpk	Non Cash Retirement Savings Plan Expenses NonCashRetirementSavingsPlanExpenses	690000	USD
CY2016	cpk	Non Cash Retirement Savings Plan Expenses NonCashRetirementSavingsPlanExpenses	777000	USD
CY2016	cpk	Number Of Financial Institutions With Bank Credit Facilities NumberOfFinancialInstitutionsWithBankCreditFacilities	3
CY2016	cpk	Number Of Unsecured Bank Credit Facilities NumberOfUnsecuredBankCreditFacilities	4
CY2013Q2	cpk	Number Of Years To Purchase Propane Under Contract NumberOfYearsToPurchasePropaneUnderContract	P6Y
CY2016	cpk	Number Of Yearsto Collect Benefits NumberOfYearstoCollectBenefits	P20Y
CY2016	cpk	Operating Lease Term OperatingLeaseTerm	P20Y
CY2014	cpk	Operations Operations	102197000	USD
CY2015	cpk	Operations Operations	107562000	USD
CY2016	cpk	Operations Operations	117571000	USD
CY2015	cpk	Other Comprehensive Income Loss Adjustments Aoci Swap Agreements OtherComprehensiveIncomeLossAdjustmentsAOCISwapAgreements	-735000	USD
CY2016Q4	cpk	Participating Lenders In The Revolver ParticipatingLendersInTheRevolver	5
CY2014	cpk	Paymentsto Acquire Capital Leases PaymentstoAcquireCapitalLeases	1100000	USD
CY2015	cpk	Paymentsto Acquire Capital Leases PaymentstoAcquireCapitalLeases	1500000	USD
CY2016Q4	cpk	Preferredstockpriceperunit Preferredstockpriceperunit	70
CY2015Q4	cpk	Receivables And Other Deferred Charges ReceivablesAndOtherDeferredCharges	2831000	USD
CY2016Q4	cpk	Receivables And Other Deferred Charges ReceivablesAndOtherDeferredCharges	2786000	USD
CY2016Q4	cpk	Redemptionpriceperright Redemptionpriceperright	0.01
CY2014	cpk	Regulated Energy Cost Of Sales RegulatedEnergyCostOfSales	134560000	USD
CY2015	cpk	Regulated Energy Cost Of Sales RegulatedEnergyCostOfSales	122814000	USD
CY2016	cpk	Regulated Energy Cost Of Sales RegulatedEnergyCostOfSales	109609000	USD
CY2016Q4	cpk	Required Fixed Charge Coverage Ratio RequiredFixedChargeCoverageRatio	1.2
CY2016Q4	cpk	Restricted Payment RestrictedPayment	157100000	USD
CY2014Q4	cpk	Shares Held In Trust For Deferred Compensation Plan SharesHeldInTrustForDeferredCompensationPlan	57382	shares
CY2015Q4	cpk	Shares Held In Trust For Deferred Compensation Plan SharesHeldInTrustForDeferredCompensationPlan	70631	shares
CY2016Q4	cpk	Shares Held In Trust For Deferred Compensation Plan SharesHeldInTrustForDeferredCompensationPlan	76745	shares
CY2014	cpk	Shares Issued Under Performance Incentive Plan Withheld For Employee Taxes SharesIssuedUnderPerformanceIncentivePlanWithheldForEmployeeTaxes	12687	shares
CY2015	cpk	Shares Issued Under Performance Incentive Plan Withheld For Employee Taxes SharesIssuedUnderPerformanceIncentivePlanWithheldForEmployeeTaxes	12620	shares
CY2016	cpk	Shares Issued Under Performance Incentive Plan Withheld For Employee Taxes SharesIssuedUnderPerformanceIncentivePlanWithheldForEmployeeTaxes	12031	shares
CY2016	cpk	Standby Letters Of Credit StandbyLettersOfCredit	8500000	USD
CY2014	cpk	Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan StockIssuedDuringThePeriodValueRetirementSavingsPlanAndDividendReinvestmentPlan	1860000	USD
CY2015	cpk	Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan StockIssuedDuringThePeriodValueRetirementSavingsPlanAndDividendReinvestmentPlan	2235000	USD
CY2016	cpk	Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan StockIssuedDuringThePeriodValueRetirementSavingsPlanAndDividendReinvestmentPlan	2242000	USD
CY2014	cpk	Stock Splitin Formof Stock Dividend Adjustmentto Retained Earnings StockSplitinFormofStockDividendAdjustmenttoRetainedEarnings	9000	USD
CY2014	cpk	Treasury Stock Activity And Deferred Compensation Plan Activity During Period Value TreasuryStockActivityAndDeferredCompensationPlanActivityDuringPeriodValue	0	USD
CY2015	cpk	Treasury Stock Activity And Deferred Compensation Plan Activity During Period Value TreasuryStockActivityAndDeferredCompensationPlanActivityDuringPeriodValue	0	USD
CY2014	cpk	Unregulated Energy And Other Cost Of Sales UnregulatedEnergyAndOtherCostOfSales	143556000	USD
CY2015	cpk	Unregulated Energy And Other Cost Of Sales UnregulatedEnergyAndOtherCostOfSales	97228000	USD
CY2016	cpk	Unregulated Energy And Other Cost Of Sales UnregulatedEnergyAndOtherCostOfSales	128434000	USD
CY2015Q4	cpk	Unregulated Energy Property Plant And Equipment UnregulatedEnergyPropertyPlantAndEquipment	145734000	USD
CY2016Q4	cpk	Unregulated Energy Property Plant And Equipment UnregulatedEnergyPropertyPlantAndEquipment	196800000	USD
CY2016Q4	cpk	Unrestricted Payment UnrestrictedPayment	172300000	USD
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000019745
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	16308449	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	975600000	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	CHESAPEAKE UTILITIES CORP
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2016	dei	Trading Symbol TradingSymbol	CPK
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	39300000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	56935000	USD
CY2015Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	41007000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	62803000	USD
CY2015Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	8942000	USD
CY2016Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	8592000	USD
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	215313000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	245207000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5676000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5840000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4878000	USD
CY2015Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	190311000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	250967000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1958000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1937000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2367000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1168000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1157000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1415000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	909000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	909000	USD
CY2014	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	396000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	367000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	380000	USD
CY2015	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	1300000	USD
CY2016	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	1400000	USD
CY2016Q4	us-gaap	Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries	45000000	USD
CY2014	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6881000	USD
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	-1500000	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	-130000	USD
CY2015Q4	us-gaap	Assets Assets	1067421000	USD
CY2016Q4	us-gaap	Assets Assets	1229219000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	111707000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	141151000	USD
CY2015Q4	us-gaap	Bank Overdrafts BankOverdrafts	4640000	USD
CY2016Q4	us-gaap	Bank Overdrafts BankOverdrafts	8560000	USD
CY2014Q4	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	0	USD
CY2015Q4	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	30164000	USD
CY2016Q4	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	0	USD
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CY2016	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Cost Expensed BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed	514000	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	7040000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10268000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	9791000	USD
CY2015Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	4824000	USD
CY2016Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	3471000	USD
CY2014	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	6130000	USD
CY2015	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4824000	USD
CY2016	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	3471000	USD
CY2013Q2	us-gaap	Capital Leased Assets Noncurrent Fair Value Disclosure CapitalLeasedAssetsNoncurrentFairValueDisclosure	7100000	USD
CY2015Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	4800000	USD
CY2016Q4	us-gaap	Capital Leases Balance Sheet Assets By Major Class Net CapitalLeasesBalanceSheetAssetsByMajorClassNet	3500000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	3600000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	1500000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	625000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	1500000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	1500000	USD
CY2015Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	507144000	USD
CY2016Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	583040000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3356000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4574000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2855000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4178000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1218000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1719000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1323000	USD
CY2016	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	-233000	USD
CY2016	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	681000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	831183	shares
CY2014	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.0667
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.1325
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.2025
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.4867
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.4867
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	7432000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	7935000	USD
CY2015Q4	us-gaap	Compensation And Benefits Trust CompensationAndBenefitsTrust	1883000	USD
CY2016Q4	us-gaap	Compensation And Benefits Trust CompensationAndBenefitsTrust	2416000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	32949000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	40976000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	45637000	USD
CY2015Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	62774000	USD
CY2016Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	56276000	USD
CY2015Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	1700000	USD
CY2016Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	1000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	434000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4875000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-4898000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1710000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6385000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-2916000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1311000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1533000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2053000	USD
CY2015Q4	us-gaap	Customer Advances And Deposits Current CustomerAdvancesAndDepositsCurrent	27173000	USD
CY2016Q4	us-gaap	Customer Advances And Deposits Current CustomerAdvancesAndDepositsCurrent	29238000	USD
CY2016	us-gaap	Deferred Compensation Arrangement With Individual Requisite Service Period1 DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1	P2Y
CY2015Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	280684000	USD
CY2016Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	312128000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22235000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	20520000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	31257000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	192600000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	222894000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2600000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2100000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2100000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	15467000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18683000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	943000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	952000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	884000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	893000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4078000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4946000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2643000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	6570000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	6230000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	1153000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	1131000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	208067000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	241577000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	485000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	442000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	192600000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	222894000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5961000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6375000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	185448000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	218074000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	27246000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	-8869000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	1101000	USD
CY2016	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-25829000	USD
CY2016	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-678000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	257000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	10000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	321000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	12000	USD
CY2015Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	50959000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	51940000	USD
CY2016	us-gaap	Defined Benefit Plan Future Amortization Of Prior Service Cost Credit DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit	-77000	USD
CY2016	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	1
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	4100000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	4500000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.06
CY2016	us-gaap	Defined Contribution Plan Employers Matching Contribution Annual Vesting Percentage DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage	1
CY2014	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	6600000	USD
CY2015	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7000000	USD
CY2016	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7300000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	26316000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	29972000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	32159000	USD
CY2016	us-gaap	Derivative Nonmonetary Notional Amount Volume DerivativeNonmonetaryNotionalAmountVolume	4100000	gal
CY2015Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	4390000	USD
CY2016Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	4973000	USD
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.48
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.73
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.87
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.47
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.44
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.72
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.86
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3988
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3954
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3881
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2014	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	684000	USD
CY2015	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1235000	USD
CY2016	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1887000	USD
CY2015Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	10014000	USD
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	10496000	USD
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2200000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	790000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	780000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	952000	USD
CY2015Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	433000	USD
CY2016Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	773000	USD
CY2015Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	153000	USD
CY2016Q4	us-gaap	Energy Marketing Contracts Assets Current EnergyMarketingContractsAssetsCurrent	823000	USD
CY2015Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	3410000	USD
CY2016Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	5484000	USD
CY2015Q4	us-gaap	Energy Related Inventory Propane Gas EnergyRelatedInventoryPropaneGas	6619000	USD
CY2016Q4	us-gaap	Energy Related Inventory Propane Gas EnergyRelatedInventoryPropaneGas	6457000	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	5000	USD
CY2016	us-gaap	Gain Loss On Fair Value Hedge Ineffectiveness Net GainLossOnFairValueHedgeIneffectivenessNet	448000	USD
CY2016	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	448000	USD
CY2014	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	7139000	USD
CY2015	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2016	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	8000	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	69000	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	123000	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	82000	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	151000	USD
CY2014Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	287000	USD
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	279000	USD
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	561000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2330000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2709000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	366000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	288000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	353000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	353000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	353000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4552000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	4552000	USD
CY2016Q4	us-gaap	Gain Contingency Unrecorded Amount GainContingencyUnrecordedAmount	650000	USD
CY2014	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7293000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	340000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-695000	USD
CY2016	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	531000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	14548000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	15070000	USD
CY2015Q4	us-gaap	Ground Leases Accumulated Amortization GroundLeasesAccumulatedAmortization	2300000	USD
CY2016Q4	us-gaap	Ground Leases Accumulated Amortization GroundLeasesAccumulatedAmortization	3700000	USD
CY2016Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	57200000	USD
CY2014	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	6881000	USD
CY2015	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2016	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	60037000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	68045000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	73016000	USD
CY2014	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-35000	USD
CY2015	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-23000	USD
CY2016	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-71000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23945000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26905000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28341000	USD
CY2014	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	267000	USD
CY2015	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	263000	USD
CY2016	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	264000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	21121000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	23865000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22759000	USD
CY2014	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	145000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	241000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2424000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2946000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3062000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3422000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	17588000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	11076000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-5308000	USD
CY2015Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	24950000	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	22888000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-13623000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-11916000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	18829000	USD
CY2014	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-20683000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-17097000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	27013000	USD
CY2014	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-927000	USD
CY2015	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	1976000	USD
CY2016	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	2065000	USD
CY2014	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	37000	USD
CY2015	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-331000	USD
CY2016	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	358000	USD
CY2014	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	15936000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	4967000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-2466000	USD
CY2014	us-gaap	Increase Decrease In Intangible Assets Current IncreaseDecreaseInIntangibleAssetsCurrent	-14000	USD
CY2015	us-gaap	Increase Decrease In Intangible Assets Current IncreaseDecreaseInIntangibleAssetsCurrent	0	USD
CY2016	us-gaap	Increase Decrease In Intangible Assets Current IncreaseDecreaseInIntangibleAssetsCurrent	0	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-4177000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1527000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2531000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2944000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3972000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1803000	USD
CY2014	us-gaap	Increase Decrease In Outstanding Checks Financing Activities IncreaseDecreaseInOutstandingChecksFinancingActivities	-921000	USD
CY2015	us-gaap	Increase Decrease In Outstanding Checks Financing Activities IncreaseDecreaseInOutstandingChecksFinancingActivities	2450000	USD
CY2016	us-gaap	Increase Decrease In Outstanding Checks Financing Activities IncreaseDecreaseInOutstandingChecksFinancingActivities	3920000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	699000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	759000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1387000	USD
CY2014	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	11014000	USD
CY2015	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-3883000	USD
CY2016	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	7523000	USD
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	53636	shares
CY2015Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	168757000	USD
CY2016Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	201311000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	48950	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	42552	shares
CY2015Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2222000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1843000	USD
CY2016	us-gaap	Intercompany Agreements Description IntercompanyAgreementsDescription	3
CY2014	us-gaap	Interest Expense InterestExpense	9482000	USD
CY2015	us-gaap	Interest Expense InterestExpense	10006000	USD
CY2016	us-gaap	Interest Expense InterestExpense	10639000	USD
CY2014	us-gaap	Interest Paid InterestPaid	8870000	USD
CY2015	us-gaap	Interest Paid InterestPaid	9497000	USD
CY2016	us-gaap	Interest Paid InterestPaid	10315000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1311000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1312000	USD
CY2015Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	3644000	USD
CY2016Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	4902000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1067421000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1229219000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	279593000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	334051000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	50000	USD
CY2015	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	106000	USD
CY2016	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	144810000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	320000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	118689000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	153700000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	145900000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	158157000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	149053000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	9151000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	12099000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	9151000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	12099000	USD
CY2015Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	165100000	USD
CY2016Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	161500000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	87400000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	12099000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	13600000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	15600000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	11245000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	9421000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	149006000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	136954000	USD
CY2016	us-gaap	Loss On Fair Value Hedge Ineffectiveness LossOnFairValueHedgeIneffectiveness	83000	USD
CY2014	us-gaap	Maintenance Costs MaintenanceCosts	9706000	USD
CY2015	us-gaap	Maintenance Costs MaintenanceCosts	11803000	USD
CY2016	us-gaap	Maintenance Costs MaintenanceCosts	12391000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	8520000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	58697000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	67989000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-81010000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-164539000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-170037000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73708000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	104123000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	103371000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	36092000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	21109000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	6294000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	5119000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	8619000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	41140000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	20367000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	8029000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	4416000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	11863000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	44675000	USD
CY2014	us-gaap	Operating Expenses OperatingExpenses	436555000	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	381486000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	414764000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	62279000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	37508000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	13170000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	10909000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	16171000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	77758000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	36380000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	15742000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	10156000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	21819000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	84096000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	6800000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1400000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	462000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	688000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	848000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1100000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	2300000	USD
CY2016	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	264000	USD
CY2014	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1800000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1700000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2500000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7059000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7063000	USD
CY2015Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1044000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	2470000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-34000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-40000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-48000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-24000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-27000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-29000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-636000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	508000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-164000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	962000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3143000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-164000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	962000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	25151000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	3076000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-103000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-268000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	1997000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-73000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-178000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-33000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-227000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	742000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-22000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-150000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	496000	USD
CY2015Q4	us-gaap	Other Inventory OtherInventory	3803000	USD
CY2016Q4	us-gaap	Other Inventory OtherInventory	4576000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2597000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4750000	USD
CY2014	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-3000	USD
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-47000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	79000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	101000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	293000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-441000	USD
CY2016	us-gaap	Other Restrictions On Payment Of Dividends OtherRestrictionsOnPaymentOfDividends	10.0
CY2014	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	13431000	USD
CY2015	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	-4766000	USD
CY2016	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	-10607000	USD
CY2014	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	233000	USD
CY2015	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	174000	USD
CY2016	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	350000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	13887000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15924000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17482000	USD
CY2014	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2015	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	20930000	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	91588000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	143599000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	169861000	USD
CY2015Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	33481000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	32828000	USD
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2015Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	7146000	USD
CY2016Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	6792000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	57360000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	49975000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	500000	USD
CY2014	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-16513000	USD
CY2015	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	82178000	USD
CY2016	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	32526000	USD
CY2014	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	-165000	USD
CY2015	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	813000	USD
CY2016	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	811000	USD
CY2014	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	10797000	USD
CY2015	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	164000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	174000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1007489000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1175595000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	854950000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	986664000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	18999000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	21114000	USD
CY2015Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	507000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	580000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Gross PropertySubjectToOrAvailableForOperatingLeaseGross	1400000	USD
CY2016	us-gaap	Public Utilities Approved Rate Increase Decrease Amount PublicUtilitiesApprovedRateIncreaseDecreaseAmount	2250000	USD
CY2015Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	842756000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	957681000	USD
CY2016Q4	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	82200000	USD
CY2016Q4	us-gaap	Purchase Obligation Due In Fourth And Fifth Year PurchaseObligationDueInFourthAndFifthYear	39500000	USD
CY2016Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	90000000	USD
CY2016Q4	us-gaap	Purchase Obligation Due In Second And Third Year PurchaseObligationDueInSecondAndThirdYear	94600000	USD
CY2016Q4	us-gaap	Ratio Of Indebtedness To Net Capital1 RatioOfIndebtednessToNetCapital1	0.65
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-472000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-454000	USD
CY2014	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	300442000	USD
CY2015	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	301902000	USD
CY2016	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	305689000	USD
CY2015Q4	us-gaap	Regulatory Assets RegulatoryAssets	85787000	USD
CY2016Q4	us-gaap	Regulatory Assets RegulatoryAssets	84497000	USD
CY2015Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	8268000	USD
CY2016Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	7694000	USD
CY2015Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	77519000	USD
CY2016Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	76803000	USD
CY2015Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	50429000	USD
CY2016Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	44355000	USD
CY2015Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	7365000	USD
CY2016Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	1291000	USD
CY2015Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	43064000	USD
CY2016Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	43064000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	9969000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10820000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	9146000	USD
CY2016Q4	us-gaap	Restricted Investments Percent Of Net Assets RestrictedInvestmentsPercentOfNetAssets	0.10
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	166235000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	192062000	USD
CY2014	us-gaap	Revenues Revenues	498834000	USD
CY2015Q1	us-gaap	Revenues Revenues	170081000	USD
CY2015Q2	us-gaap	Revenues Revenues	92682000	USD
CY2015Q3	us-gaap	Revenues Revenues	91913000	USD
CY2015Q4	us-gaap	Revenues Revenues	104567000	USD
CY2015	us-gaap	Revenues Revenues	459244000	USD
CY2016Q1	us-gaap	Revenues Revenues	146296000	USD
CY2016Q2	us-gaap	Revenues Revenues	102342000	USD
CY2016Q3	us-gaap	Revenues Revenues	108348000	USD
CY2016Q4	us-gaap	Revenues Revenues	141874000	USD
CY2016	us-gaap	Revenues Revenues	498860000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1557000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	278773000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	300322000	USD
CY2015Q4	us-gaap	Sales And Excise Tax Payable Current And Noncurrent SalesAndExciseTaxPayableCurrentAndNoncurrent	310000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	1958000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	1937000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	2367000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	358138000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	446086000	USD
CY2014	us-gaap	Taxes Other TaxesOther	13339000	USD
CY2015	us-gaap	Taxes Other TaxesOther	13607000	USD
CY2016	us-gaap	Taxes Other TaxesOther	14730000	USD
CY2014	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	237000	USD
CY2015	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	7000	USD
CY2016	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	379000	USD
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1883000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	953	shares
CY2015Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	173397000	USD
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	209871000	USD
CY2015Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0130
CY2016Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0143
CY2016	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	960488	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2416000	USD
CY2015Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	333000	USD
CY2016Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	291000	USD
CY2014	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	-501000	USD
CY2015	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	-96000	USD
CY2016	us-gaap	Unrealized Gain Loss On Commodity Contracts UnrealizedGainLossOnCommodityContracts	385000	USD
CY2014	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1084000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	474000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-45000	USD
CY2015	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	30165000	USD
CY2014	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	535000	USD
CY2015	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2016	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2016	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	62.26	USD
CY2014	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1889000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1662000	USD
CY2014	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	184961000	USD
CY2015	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	162108000	USD
CY2016	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	203778000	USD
CY2013Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1635000	USD
CY2014Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1120000	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	909000	USD
CY2014	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	1073000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	979000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	985000	USD
CY2014	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	85000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	246000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	340000	USD
CY2014	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1673000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1436000	USD
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	14604944	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15143373	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15613091	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	14551308	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15094423	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15570539	shares
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates in measuring assets and liabilities and related revenues and expenses. These estimates involve judgments with respect to, among other things, various future economic factors that are difficult to predict and are beyond our control; therefore, actual results could differ from these estimates.</font></div></div>

Files In Submission

Name	View Source	Status
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0001628280-17-001844-index.html	Edgar Link	pending
0001628280-17-001844.txt	Edgar Link	pending
0001628280-17-001844-xbrl.zip	Edgar Link	pending
businessstructurev1.jpg	Edgar Link	pending
cpk-20161231.xml	Edgar Link	completed
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$CPK
CHESAPEAKE UTILITIES CORP Stock $cpk

2015 Q4 Form 10-K Financial Statement

#000162828017001844 Filed on February 28, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CPK CHESAPEAKE UTILITIES CORP Stock $cpk

2015 Q4 Form 10-K Financial Statement

#000162828017001844 Filed on February 28, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CPK
CHESAPEAKE UTILITIES CORP Stock $cpk