Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net Income	$ 28,930	$ 28,664
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,252	11,074
Depreciation and accretion included in other costs	2,361	2,135
Deferred income taxes	5,738	3,430
Realized gain on commodity contracts and sale of assets	(4,458)	(363)
Unrealized loss (gain) on investments and commodity contracts	1,511	(721)
Employee benefits and compensation	11	382
Share-based compensation	1,056	487
Changes in assets and liabilities:
Accounts receivable and accrued revenue	8,139	18,147
Propane inventory, storage gas and other inventory	3,921	7,207
Regulatory assets/liabilities, net	7,309	3,121
Prepaid expenses and other current assets	3,359	11,873
Accounts payable and other accrued liabilities	(4,243)	(44,783)
Income taxes receivable	4,820	6,241
Customer deposits and refunds	(1,817)	(4,445)
Accrued compensation	(8,766)	(5,548)
Other assets and liabilities, net	(1,315)	3,585
Net cash provided by operating activities	58,808	40,486
Investing Activities
Property, plant and equipment expenditures	(35,182)	(43,216)
Proceeds from sale of assets	4,106	115
Environmental expenditures	(422)	(268)
Net cash used in investing activities	(31,498)	(43,369)
Financing Activities
Common stock dividends	(6,483)	(5,877)
Issuance (repurchase) of stock under the Dividend Reinvestment Plan	192	(183)
Tax withholding payments related to net settled stock compensation	(977)	(692)
Change in cash overdrafts due to outstanding checks	(4,727)	84
Net borrowings (repayments) under line of credit agreements	11,695	(18,149)
Proceeds from issuance of long-term debt, net of offering fees	(13)	30,000
Repayment of long-term debt and capital lease obligation	(30,000)	(414)
Net cash (used) provided by financing activities	(30,313)	4,769
Net Increase (Decrease) in Cash and Cash Equivalents	(3,003)	1,886
Cash and Cash Equivalents—Beginning of Period	6,985	6,089
Cash and Cash Equivalents—End of Period	$ 3,982	$ 7,975

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

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell mineral resources, energy, and agricultural products at some future point held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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