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Consolidated Balance Sheets - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 54,161 | $ 59,547
Receivables, net | 946,741 | 873,986
Inventories | 335,609 | 291,167
Current regulatory assets | 118,691 | 68,527
Prepayments and other current assets | 95,741 | 44,120
Total current assets | 1,550,943 | 1,337,347
Noncurrent assets: |  |
Property, plant and equipment | 8,972,849 | 8,300,770
Less accumulated depreciation, depletion and amortization | 3,216,461 | 3,133,831
Net property, plant and equipment | 5,756,388 | 5,166,939
Goodwill | 765,386 | 714,963
Other intangible assets, net | 22,578 | 25,496
Regulatory assets | 357,851 | 379,381
Investments | 175,476 | 165,022
Operating lease right-of-use assets | 124,138 | 120,113
Other | 157,675 | 144,111
Total noncurrent assets | 7,359,492 | 6,716,025
Total assets | 8,910,435 | 8,053,372
Current liabilities: |  |
Short-term borrowings | 0 | 50,000
Long-term debt due within one year | 148,053 | 1,555
Accounts payable | 478,933 | 426,264
Taxes payable | 80,372 | 88,844
Dividends payable | 44,229 | 42,611
Accrued compensation | 81,904 | 90,629
Operating lease liabilities due within one year | 35,368 | 33,655
Regulatory liabilities due within one year | 16,303 | 31,450
Other accrued liabilities | 207,078 | 198,514
Total current liabilities | 1,092,240 | 963,522
Noncurrent liabilities: |  |
Long-term debt | 2,593,847 | 2,211,575
Deferred income taxes | 591,962 | 516,098
Asset retirement obligations | 458,061 | 440,356
Regulatory liabilities | 428,790 | 428,075
Operating lease liabilities | 89,253 | 86,868
Other | 273,408 | 327,773
Total noncurrent liabilities | 4,435,321 | 4,010,745
Commitments and contingencies |  |
Stockholders' equity: |  |
Common stock | 203,889 | 201,061
Other paid-in capital | 1,461,205 | 1,371,385
Retained earnings | 1,762,410 | 1,558,363
Accumulated other comprehensive loss | (41,004) | (48,078)
Treasury stock at cost - 538,921 shares | (3,626) | (3,626)
Total stockholders' equity | 3,382,874 | 3,079,105
Total liabilities and stockholders' equity | $ 8,910,435 | $ 8,053,372
Common Stock, Shares Authorized | 500,000,000 | 500,000,000
Common Stock, Par Value Per Share | $ 1.00 | $ 1.00
Common Stock, Shares, Issued | 203,889,661 | 201,061,198
Treasury Stock, Common, Shares | 538,921 | 538,921
MDU Resources Group, Inc. [Member] |  |
Current assets: |  |
Cash and cash equivalents | $ 6,159 | $ 8,781
Receivables, net | 6,120 | 4,865
Prepayments and other current assets | 2,528 | 1,612
Total current assets | 64,503 | 65,797
Noncurrent assets: |  |
Investments | 55,686 | 52,000
Operating lease right-of-use assets | 114 | 56
Other | 26,558 | 28,866
Total noncurrent assets | 3,458,259 | 3,160,569
Total assets | 3,522,762 | 3,226,366
Current liabilities: |  |
Accounts payable | 2,546 | 2,135
Taxes payable | 1,672 | 4,056
Dividends payable | 44,229 | 42,611
Accrued compensation | 4,098 | 7,825
Operating lease liabilities due within one year | 52 | 40
Other accrued liabilities | 7,309 | 6,881
Total current liabilities | 66,039 | 68,960
Noncurrent liabilities: |  |
Operating lease liabilities | 62 | 16
Other | 73,787 | 78,285
Total noncurrent liabilities | 73,849 | 78,301
Commitments and contingencies |  |
Stockholders' equity: |  |
Common stock | 203,889 | 201,061
Other paid-in capital | 1,461,205 | 1,371,385
Retained earnings | 1,762,410 | 1,558,363
Accumulated other comprehensive loss | (41,004) | (48,078)
Treasury stock at cost - 538,921 shares | (3,626) | (3,626)
Total stockholders' equity | 3,382,874 | 3,079,105
Total liabilities and stockholders' equity | $ 3,522,762 | $ 3,226,366
Common Stock, Shares Authorized | 500,000,000 | 500,000,000
Common Stock, Par Value Per Share | $ 1.00 | $ 1.00
Common Stock, Shares, Issued | 203,889,661 | 201,061,198
Treasury Stock, Common, Shares | 538,921 | 538,921

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