Regulatory Matters (Tables)

9 Months Ended

Sep. 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 September 30, 2022 and December 31, 2021 and the period we expect to recover or refund such amounts:


	Period of	September 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	$	110,183	$	7,791	$	114,961
Alternative Revenue Program Riders2	Up to 2 years	7,528		1,988		11,889		5,564
Asset Retirement Obligations1	Asset lives	—		1,323		—		742

ISO Cost Recovery Trackers1	Up to 2 years	660		740		—		1,342
Unrecovered Project Costs1	Up to 5 years	320		1,063		2,136		1,455
Deferred Rate Case Expenses1	Various	412		848		607		1,131
Debt Reacquisition Premiums1	10 years	25		222		100		240
Fuel Clause Adjustments1	Up to 1 year	13,185		—		4,819		—
Other1	Various	—		226		—		73
Total Regulatory Assets		$	29,921	$	116,593	$	27,342	$	125,508
Regulatory Liabilities
Deferred Income Taxes	Asset lives	$	—	$	128,397	$	—	$	129,437
Plant Removal Obligations	Asset lives	8,526		106,008		8,306		101,595
Fuel Clause Adjustments	Up to 1 year	—		—		1,554		—
Alternative Revenue Program Riders	Various	4,178		6,048		5,772		3,336
Pension and Other Postretirement Benefit Plans	Up to 1 year	2,603		—		2,603		—


Derivative Instruments	Various	5,532		—		6,214		—
Other	Various	275		92		395		62
Total Regulatory Liabilities		$	21,114	$	240,545	$	24,844	$	234,430

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