Acquisitions Divestitures (Tables)

12 Months Ended

Dec. 31, 2020

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

These acquisitions generated the following operating revenues and income:

	For the Year Ended				For the Year Ended
	December 31, 2020				December 31, 2019
	Operating Revenues		Operating Income		Operating Revenues		Operating Income
(in thousands)
Western Natural Gas	$	555	$	90	$	—	$	—
Elkton Gas	$	2,399	$	418	$	—	$	—
Boulden	$	5,717	$	1,854	$	550	$	239

Disposal Groups, Including Discontinued Operations [Table Text Block]

A summary of discontinued operations presented in the consolidated statements of income includes the following:

	For the Year Ended December 31,
(in thousands)	2020		2019		2018
Operating revenues(1)	$	26	$	161,289	$	258,713
Cost of sales(1)	—		157,646		252,111
Other operating expenses	230		5,221		6,825
Operating loss	(204)		(1,578)		(223)
Interest and other income (expense)	1,013		(297)		(294)
Earnings / (Loss) from Discontinued Operations before income taxes	809		(1,875)		(517)
Gain on sale of Discontinued Operations	200		7,344		—
Income tax (benefit) / expense	153		1,416		(129)
Gain / (Loss) from Discontinued Operations, Net of Tax	$	856	$	4,053	$	(388)

(1) Included in operating revenues and cost of sales for the years ended December 31, 2019 and 2018, is $19.8 million, and $31.5 million respectively, representing amounts which had been previously eliminated in consolidation related to intercompany activity which continued with the buyers after the disposition of the assets of PESCO.

Discontinued Operations [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Discontinued Operations Supplemental Cash Flows Schedule [Table Text Block]

The following table summarizes significant statements of cash flows data related to the discontinued operations of PESCO:

	For the Year Ended December 31,
(in thousands)	2019		2018
Depreciation and amortization	$	477	$	582
Property, plant and equipment expenditures	$	—	$	115
Deferred income taxes	$	(125)	$	1,088
Realized / (loss) gain on commodity contracts	$	(2,161)	$	5,002