Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2022

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets and Liabilities

The following presents our current and long-term regulatory assets and liabilities as of June 30, 2022 and December 31, 2021 and the period we expect to recover or refund such amounts:


	Period of	June 30, 2022				December 31, 2021
(in thousands)	Recovery/Refund	Current		Long-Term		Current		Long Term

Regulatory Assets
Pension and Other Postretirement Benefit Plans1	Various	$	7,791	$	112,011	$	7,791	$	114,961
Alternative Revenue Program Riders2	Up to 2 years	4,695		5,370		11,889		5,564
Asset Retirement Obligations1	Asset lives	—		1,238		—		742

ISO Cost Recovery Trackers1	Up to 2 years	440		726		—		1,342
Unrecovered Project Costs1	Up to 5 years	356		1,136		2,136		1,455
Deferred Rate Case Expenses1	Various	477		943		607		1,131
Debt Reacquisition Premiums1	Up to 11 years	35		228		100		240
Fuel Clause Adjustments1	Up to 1 year	6,797		—		4,819		—
Other1	Various	84		302		—		73
Total Regulatory Assets		$	20,675	$	121,954	$	27,342	$	125,508
Regulatory Liabilities
Deferred Income Taxes	Asset lives	$	—	$	128,836	$	—	$	129,437
Plant Removal Obligations	Asset lives	8,544		101,458		8,306		101,595
Fuel Clause Adjustments	Up to 1 year	1,554		—		1,554		—
Alternative Revenue Program Riders	Various	3,371		5,104		5,772		3,336
Pension and Other Postretirement Benefit Plans	Up to 1 year	2,603		—		2,603		—


Derivative Instruments	Various	3,120		—		6,214		—
Other	Various	266		58		395		62
Total Regulatory Liabilities		$	19,458	$	235,456	$	24,844	$	234,430

1Costs subject to recovery without a rate of return.
2Amount eligible for recovery includes an incentive or rate of return.