XML 50 R31.htm IDEA: XBRL DOCUMENT v3.20.4
Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2020
Regulated Operations [Abstract]  
Schedule of Regulatory Assets and Liabilities
We had the following regulatory assets and liabilities as of December 31 (in thousands):
20202019
Regulatory assets
Deferred energy and fuel cost adjustments (a)
$39,035 $34,088 
Deferred gas cost adjustments (a)
3,200 1,540 
Gas price derivatives (a)
2,226 3,328 
Deferred taxes on AFUDC (b)
7,491 7,790 
Employee benefit plans and related deferred taxes (c)
116,598 115,900 
Environmental (a)
1,413 1,454 
Loss on reacquired debt (a)
22,864 24,777 
Renewable energy standard adjustment (a)
— 1,622 
Deferred taxes on flow-through accounting (c)
47,515 41,220 
Decommissioning costs (a)
8,988 10,670 
Gas supply contract termination (a)
2,524 8,485 
Other regulatory assets (a)
26,404 20,470 
Total regulatory assets278,258 271,344 
Less current regulatory assets(51,676)(43,282)
Regulatory assets, non-current$226,582 $228,062 
Regulatory liabilities
Deferred energy and gas costs (a)
$13,253 $17,278 
Employee benefit plan costs and related deferred taxes (c)
40,256 43,349 
Cost of removal (a)
172,902 166,727 
Excess deferred income taxes (c)
285,259 285,438 
Other regulatory liabilities (c)
21,050 23,860 
Total regulatory liabilities532,720 536,652 
Less current regulatory liabilities(25,061)(33,507)
Regulatory liabilities, non-current$507,659 $503,145 
__________
(a)    Recovery of costs, but we are not allowed a rate of return.
(b)    In addition to recovery of costs, we are 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.