Balance Sheet Components

6 Months Ended

Jun. 30, 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 June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30,		December 31,
	2022		2021
Materials and supplies	$	70,601	$	62,003
Fuel stock		5,776		5,126
Stored natural gas		29,414		17,604
Total	$	105,791	$	84,733

Other Current Assets

Other current assets consisted of the following as of June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30,		December 31,
	2022		2021
Collateral posted for derivative instruments after netting with outstanding derivatives	$	7,821	$	21,477
Prepayments		26,437		24,387
Income taxes receivable		29,785		29,615
Derivative assets net of collateral		11,026		1,398
Other		4,161		3,877
Total	$	79,230	$	80,754

Net Utility Property

Net utility property, which is recorded at original cost net of accumulated depreciation, consisted of the following as of June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30,		December 31,
	2022		2021
Utility plant in service	$	7,354,890	$	7,166,580
Construction work in progress		164,999		205,405
Total		7,519,889		7,371,985
Less: Accumulated depreciation and amortization		2,212,483		2,146,470
Total	$	5,307,406	$	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 June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30,		December 31,
	2022		2021
Operating lease ROU assets	$	69,183	$	70,133
Equity investments		111,957		91,057
Finance lease ROU assets		41,876		43,697
Non-utility property		25,459		20,033
Notes receivable		17,049		14,949
Long-term prepaid license fees		15,746		8,465
Investment in affiliated trust		11,547		11,547
Derivative assets net of collateral		11,167		2,659
Deferred compensation assets		7,994		9,513
Other		9,788		8,490
Total	$	321,766	$	280,543

Other Current Liabilities

Other current liabilities consisted of the following as of June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30, 2022		December 31, 2021
Accrued taxes other than income taxes	$	39,754	$	41,706
Derivative liabilities		4,678		28,801
Employee paid time off accruals		30,884		27,741
Accrued interest		20,283		17,538
Deferred derivative revenue		18,824		884
Pensions and other postretirement benefits		13,703		13,582
Other		44,851		38,609
Total	$	172,977	$	168,861

Other Non-Current Liabilities and Deferred Credits

Other non-current liabilities and deferred credits consisted of the following as of June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30, 2022		December 31, 2021
Operating lease liabilities	$	67,145	$	66,068
Finance lease liabilities		44,113		45,730
Deferred investment tax credits		29,038		29,313
Asset retirement obligations		16,322		17,142
Derivative liabilities		2,698		4,525
Other		15,707		15,347
Total	$	175,023	$	178,125

Regulatory Assets and Liabilities

Regulatory assets and liabilities consisted of the following as of June 30, 2022 and December 31, 2021 (dollars in thousands):


	June 30, 2022				December 31, 2021
	Current		Non-Current		Current		Non-Current
Regulatory Assets
Energy commodity derivatives	$	—	$	—	$	12,447	$	2,938
Decoupling surcharge		8,834		3,793		9,907		14,625
Deferred natural gas costs		29,647		11,323		14,095		6,932
Deferred power costs		5,300		1,059		7,334		3,501
Pension and other postretirement benefit plans		—		162,943		—		165,696
Interest rate swaps		—		189,347		—		199,754
Deferred income taxes		—		245,893		—		244,154
Settlement with Coeur d'Alene Tribe		—		38,368		—		38,926
AFUDC above FERC allowed rate		—		50,328		—		48,455
Demand side management programs		—		3,736		—		3,974
Utility plant to be abandoned		—		25,555		—		26,771
COVID-19 deferrals		—		13,963		—		13,591
Unamortized debt repurchase costs		—		6,434		—		6,768
Advanced meter infrastructure		—		34,194		—		36,008
Other regulatory assets		418		52,219		—		48,533
Total regulatory assets	$	44,199	$	839,155	$	43,783	$	860,626
Regulatory Liabilities
Income tax related liabilities	$	73,207	$	416,719	$	56,331	$	458,789
Energy commodity derivatives		1,801		522		—		—
Deferred power costs		—		6,610		6,457		5,434
Decoupling rebate		3,624		16,330		3,049		6,259
Utility plant retirement costs		—		357,367		—		350,190
Interest rate swaps		—		21,270		—		15,062
COVID-19 deferrals		—		12,049		—		12,500
Other regulatory liabilities		15,977		16,006		11,312		13,281
Total regulatory liabilities	$	94,609	$	846,873	$	77,149	$	861,515