Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2022

Regulated Operations [Abstract]

Schedule of Regulatory Assets and Liabilities

We had the following regulatory assets and liabilities as of December 31 (in thousands):

	2022			2021
Regulatory assets
Winter Storm Uri (a)	$	347,980		$	509,025
Deferred energy and fuel cost adjustments (b)		72,580			59,973
Deferred gas cost adjustments (b)		12,147			9,488
Gas price derivatives (b)		8,793			2,584
Deferred taxes on AFUDC (b)		7,333			7,457
Employee benefit plans and related deferred taxes (c)		89,259			88,923
Environmental (b)		1,343			1,385
Loss on reacquired debt (b)		19,213			21,011
Deferred taxes on flow-through accounting (b)		69,529			63,243
Decommissioning costs (b)		3,472			5,961
Other regulatory assets (b)		21,332			27,549
Total regulatory assets		652,981			796,599
Less current regulatory assets		(260,312	)		(270,290	)
Regulatory assets, non-current	$	392,669		$	526,309
Regulatory liabilities
Deferred energy and gas costs (b)	$	24,030		$	6,113
Employee benefit plan costs and related deferred taxes (c)		34,258			32,241
Cost of removal (b)		175,614			179,976
Excess deferred income taxes (c)		254,833			264,042
Other regulatory liabilities (c)		29,838			20,579
Total regulatory liabilities		518,573			502,951
Less current regulatory liabilities		(46,013	)		(17,574	)
Regulatory liabilities, non-current	$	472,560		$	485,377

(a)Timing of Winter Storm Uri incremental cost recovery and associated carrying costs vary by jurisdiction. See further information below.

(b)Recovery of costs, but we are not allowed a rate of return.

(c)In addition to recovery or repayment of costs, we are allowed a return on a portion of this amount or a reduction in rate base.