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Condensed Consolidated Balance Sheets (unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 13,442 $ 6,356
Restricted cash and equivalents 4,483 4,383
Accounts receivable, net 282,382 265,961
Materials, supplies and fuel 102,603 117,400
Derivative assets, current 1,917 1,848
Income tax receivable, net 18,115 19,446
Regulatory assets, current 129,951 51,676
Other current assets 25,722 26,221
Total current assets 578,615 493,291
Property, plant and equipment 7,415,818 7,305,530
Less: accumulated depreciation and depletion (1,320,525) (1,285,816)
Total property, plant and equipment, net 6,095,293 6,019,714
Other assets:    
Goodwill 1,299,454 1,299,454
Intangible assets, net 11,649 11,944
Regulatory assets, non-current 672,306 226,582
Other assets, non-current 38,882 37,801
Total other assets, non-current 2,022,291 1,575,781
TOTAL ASSETS 8,696,199 8,088,786
Current liabilities:    
Accounts payable 160,179 183,340
Accrued liabilities 230,444 243,612
Derivative liabilities, current 2,526 2,044
Regulatory liabilities, current 13,580 25,061
Notes payable 815,870 234,040
Current maturities of long-term debt 7,000 8,436
Total current liabilities 1,229,599 696,533
Long-term debt, net of current maturities 3,529,158 3,528,100
Deferred credits and other liabilities:    
Deferred income tax liabilities, net 428,127 408,624
Regulatory liabilities, non-current 497,810 507,659
Benefit plan liabilities 150,979 150,556
Other deferred credits and other liabilities 135,224 134,667
Total deferred credits and other liabilities 1,212,140 1,201,506
Commitments, contingencies and guarantees (Note 3)
Equity:    
Common stock $1 par value; 100,000,000 shares authorized; issued 62,909,973 and 62,827,179 shares, respectively 62,910 62,827
Additional paid-in capital 1,658,957 1,657,285
Retained earnings 931,538 870,738
Treasury stock, at cost – 39,940 and 32,492 shares, respectively (2,564) (2,119)
Accumulated other comprehensive income (loss) (26,328) (27,346)
Total stockholders’ equity 2,624,513 2,561,385
Noncontrolling interest 100,789 101,262
Total equity 2,725,302 2,662,647
TOTAL LIABILITIES AND TOTAL EQUITY $ 8,696,199 $ 8,088,786