Balance Sheet Components

3 Months Ended

Mar. 31, 2022

Balance Sheet Related Disclosures [Abstract]

NOTE 3. BALANCE SHEET COMPONENTS

Materials and Supplies, Fuel Stock and Stored Natural Gas

Inventories of materials and supplies, fuel stock and stored natural gas are recorded at average cost for our regulated operations and the lower of cost or net realizable value for our non-regulated operations and consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31,		December 31,
	2022		2021
Materials and supplies	$	67,059	$	62,003
Fuel stock		4,539		5,126
Stored natural gas		4,804		17,604
Total	$	76,402	$	84,733

Other Current Assets

Other current assets consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31,		December 31,
	2022		2021
Collateral posted for derivative instruments after netting with outstanding derivatives	$	4,615	$	21,477
Prepayments		32,126		24,387
Income taxes receivable		34,431		29,615
Derivative assets after netting with outstanding collateral		14,084		1,398
Other		2,887		3,877
Total	$	88,143	$	80,754

Net Utility Property

Net utility property, which is recorded at original cost net of accumulated depreciation, consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31,		December 31,
	2022		2021
Utility plant in service	$	7,195,738	$	7,166,580
Construction work in progress		221,905		205,405
Total		7,417,643		7,371,985
Less: Accumulated depreciation and amortization		2,167,366		2,146,470
Total	$	5,250,277	$	5,225,515

Other Property and Investments-Net and Other Non-Current Assets

Other property and investments-net and other non-current assets consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31,		December 31,
	2022		2021
Operating lease ROU assets	$	69,673	$	70,133
Equity investments		92,795		91,057
Finance lease ROU assets		42,787		43,697
Non-utility property		26,623		20,033
Notes receivable		15,287		14,949
Long-term prepaid license fees		13,030		8,465
Investment in affiliated trust		11,547		11,547
Deferred compensation assets		8,843		9,513
Other		18,023		11,149
Total	$	298,608	$	280,543

Other Current Liabilities

Other current liabilities consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31, 2022		December 31, 2021
Accrued taxes other than income taxes	$	52,546	$	41,706
Derivative liabilities		3,132		28,801
Employee paid time off accruals		29,258		27,741
Accrued interest		31,673		17,538
Pensions and other postretirement benefits		13,399		13,582
Other		40,513		39,493
Total	$	170,521	$	168,861

Other Non-Current Liabilities and Deferred Credits

Other non-current liabilities and deferred credits consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31, 2022		December 31, 2021
Operating lease liabilities	$	66,643	$	66,068
Finance lease liabilities		44,921		45,730
Deferred investment tax credits		29,176		29,313
Asset retirement obligations		16,878		17,142
Derivative liabilities		3,607		4,525
Other		15,821		15,347
Total	$	177,046	$	178,125

Regulatory Assets and Liabilities

Regulatory assets and liabilities consisted of the following as of March 31, 2022 and December 31, 2021 (dollars in thousands):


	March 31, 2022				December 31, 2021
	Current		Non-Current		Current		Non-Current
Regulatory Assets
Energy commodity derivatives	$	—	$	—	$	12,447	$	2,938
Decoupling surcharge		9,798		6,106		9,907		14,625
Deferred natural gas costs		18,353		8,401		14,095		6,932
Deferred power costs		5,978		2,089		7,334		3,501
Pension and other postretirement benefit plans		—		164,207		—		165,696
Interest rate swaps		—		191,087		—		199,754
Deferred income taxes		—		240,502		—		244,154
Settlement with Coeur d'Alene Tribe		—		38,647		—		38,926
AFUDC above FERC allowed rate		—		49,522		—		48,455
Demand side management programs		—		3,003		—		3,974
Utility plant to be abandoned		—		26,238		—		26,771
COVID-19 deferrals		—		15,117		—		13,591
Unamortized debt repurchase costs		—		6,582		—		6,768
Advanced meter infrastructure		—		35,101		—		36,008
Other regulatory assets		604		52,021		—		48,533
Total regulatory assets	$	34,733	$	838,623	$	43,783	$	860,626
Regulatory Liabilities
Income tax related liabilities	$	66,234	$	434,525	$	56,331	$	458,789
Energy commodity derivatives		23,477		1,096		—		—
Deferred power costs		1,540		5,485		6,457		5,434
Decoupling rebate		3,245		14,164		3,049		6,259
Utility plant retirement costs		—		350,592		—		350,190
Interest rate swaps		—		17,348		—		15,062
COVID-19 deferrals		—		12,191		—		12,500
Other regulatory liabilities		14,782		15,301		11,312		13,281
Total regulatory liabilities	$	109,278	$	850,702	$	77,149	$	861,515