Revenue Recognition Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

for the years ended December 31, 2020, 2019 and 2018:

	For the year ended December 31, 2020
(in thousands)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	63,389	$	—	$	—	$	63,389
Florida natural gas division	30,850		—		—		30,850
FPU electric distribution	76,863		—		—		76,863
FPU natural gas distribution	90,150		—		—		90,150
Maryland natural gas division	21,853		—		—		21,853
Sandpiper natural gas/propane operations	17,214		—		—		17,214
Elkton Gas	2,399						2,399
Total energy distribution	302,718		—		—		302,718
Energy transmission
Aspire Energy	—		27,951		—		27,951
Aspire Energy Express	16		—		—		16
Eastern Shore	75,117		—		—		75,117
Peninsula Pipeline	23,080		—		—		23,080
Total energy transmission	98,213		27,951		—		126,164
Energy generation
Eight Flags	—		16,147		—		16,147
Propane operations
Propane delivery operations	—		100,744		—		100,744
Energy delivery services
Marlin Gas Services	—		7,818		—		7,818
Other and eliminations
Eliminations	(48,185)		(134)		(17,602)		(65,921)
Other	—		—		528		528
Total other and eliminations	(48,185)		(134)		(17,074)		(65,393)
Total operating revenues (1)	$	352,746	$	152,526	$	(17,074)	$	488,198

(1) Total operating revenues for the year ended December 31, 2020, include other revenue (revenues from sources other than contracts with customers) of $1.4 million and $0.2 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for Maryland division and Sandpiper and late fees.

	For the year ended December 31, 2019
(in thousands)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	62,659	$	—	$	—	$	62,659
Florida natural gas division	28,485		—		—		28,485
FPU electric distribution	77,416		—		—		77,416
FPU natural gas distribution	82,418		—		—		82,418
Maryland natural gas division	22,517		—		—		22,517
Sandpiper natural gas/propane operations	19,068		—		—		19,068
Total energy distribution	292,563		—		—		292,563
Energy transmission
Aspire Energy	—		32,493		—		32,493
Aspire Energy Express	—		—		—		—
Eastern Shore	72,924		—		—		72,924
Peninsula Pipeline	16,453		—		—		16,453
Total energy transmission	89,377		32,493		—		121,870
Energy generation
Eight Flags	—		16,749		—		16,749
Propane operations
Propane delivery operations	—		109,614		—		109,614
Energy delivery services
Marlin Gas Services	—		5,702		—		5,702
Other and eliminations
Eliminations	(38,934)		(10,407)		(18,081)		(67,422)
Other	—		—		529		529
Total other and eliminations	(38,934)		(10,407)		(17,552)		(66,893)
Total operating revenues (1)	$	343,006	$	154,151	$	(17,552)	$	479,605

(1) Total operating revenues for the year ended December 31, 2019, include other revenue (revenues from sources other than contracts with customers of $(0.1) million and $0.3 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for Maryland division and Sandpiper and late fees

	For the year ended December 31, 2018
(in thousands)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	70,338	$	—	$	—	$	70,338
Florida natural gas division	25,341		—		—		25,341
FPU electric distribution	79,803		—		—		79,803
FPU natural gas distribution	81,118		—		—		81,118
Maryland natural gas division	24,172		—		—		24,172
Sandpiper natural gas/propane operations	22,088		—		—		22,088
Total energy distribution	302,860		—		—		302,860
Energy transmission
Aspire Energy	—		35,407		—		35,407
Aspire Energy Express	—		—		—		—
Eastern Shore	64,248		—		—		64,248
Peninsula Pipeline	11,927		—		—		11,927
Total energy transmission	76,175		35,407		—		111,582
Energy generation
Eight Flags	—		17,302		—		17,302
Propane operations
Propane delivery operations	—		125,560		—		125,560
Energy delivery services
Marlin Gas Services	—		121		—		121
Other and eliminations
Eliminations	(33,754)		(16,485)		(17,522)		(67,761)
Other	—		—		652		652
Total other and eliminations	(33,754)		(16,485)		(16,870)		(67,109)
Total operating revenues (1)	$	345,281	$	161,905	$	(16,870)	$	490,316

(1) Total operating revenues for the year ended December 31, 2018, include other revenue (revenues from sources other than contracts with customers) of $0.2 million and $0.3 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for Maryland division and Sandpiper and late fees.

Contract with Customer, Asset and Liability [Table Text Block]

The balances of our trade receivables, contract assets, and contract liabilities as of December 31, 2020 and 2019 were as follows:

	Trade Receivables		Contract Assets (Noncurrent)		Contract Liabilities (Current)
(in thousands)
Balance at 12/31/2019	$	47,430	$	3,465	$	589
Balance at 12/31/2020	55,600		4,816		644
Increase (decrease)	$	8,170	$	1,351	$	55

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Revenue for these businesses for the remaining performance obligations at December 31, 2020 are expected to be recognized as follows:

(in thousands)	2021		2022		2023		2024		2025		2026 and thereafter
Eastern Shore and Peninsula Pipeline	$	34,978	$	27,155	$	21,748	$	19,587	$	18,736	$	174,774
Natural gas distribution operations	4,351		5,394		4,937		4,705		4,172		32,996
FPU electric distribution	566		566		566		566		275		825
Total revenue contracts with remaining performance obligations	$	39,895	$	33,115	$	27,251	$	24,858	$	23,183	$	208,595