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Regulatory Matters

3 Months Ended

Mar. 31, 2025

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Matters

Regulatory Matters

Regulatory Assets and Liabilities

The following presents our current and long-term regulatory assets and liabilities as of March 31, 2025 and December 31, 2024 and the period we expect to recover or refund such amounts:

			Period of						March 31, 2025												December 31, 2024
(in thousands)			Recovery/Refund						Current						Long-Term						Current						Long-Term
Regulatory Assets
Pension and Other Postretirement Benefit Plans1			Various						$	—					$	87,834					$	—					$	88,161
Alternative Revenue Program Riders2			Up to 2 years						4,226						244						4,257						195
Deferred Income Taxes1			Asset lives						—						9,053						—						8,944
Fuel Clause Adjustments1			Up to 1 year						5,418						—						2,218						—
Derivative Instruments1			Up to 2 years						632						1,052						1,989						—
Other1			Various						1,263						1,241						1,498						1,373
Total Regulatory Assets									$	11,539					$	99,424					$	9,962					$	98,673
Regulatory Liabilities
Deferred Income Taxes			Asset lives						$	—					$	128,495					$	—					$	130,387
Plant Removal Obligations			Asset lives						—						126,579						—						126,263
Fuel Clause Adjustments			Up to 1 year						7,169						—						11,432						—
Alternative Revenue Program Riders			Up to 1 year						14,917						—						14,255						—
North Dakota PTC Refunds			Asset lives						—						23,816						—						20,099
Pension and Other Postretirement Benefit Plans			Various						2,547						10,153						2,547						10,758
Other			Various						2,395						1,635						1,073						1,421
Total Regulatory Liabilities									$	27,028					$	290,678					$	29,307					$	288,928
1Costs subject to recovery without a rate of return.
2Amounts eligible for recovery includes an incentive or rate of return.

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- Definition

The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit.

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