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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
--- | --- | ---
PROPERTY, PLANT AND EQUIPMENT |  |
Utility plant, at cost | $ 2,800,052 | $ 2,625,730
Construction work in progress | 379,846 | 237,011
Nonutility plant and equipment, at cost | 1,430,723 | 861,904
Construction work in progress | 176,556 | 62,492
Total property, plant and equipment | 4,787,177 | 3,787,137
Accumulated depreciation and amortization, utility plant | (601,635) | (585,160)
Accumulated depreciation and amortization, nonutility plant and equipment | (202,507) | (156,033)
Property, plant and equipment, net | 3,983,035 | 3,045,944
CURRENT ASSETS |  |
Cash and cash equivalents | 117,012 | 2,676
Customer accounts receivable: |  |
Billed | 134,173 | 139,263
Unbilled revenues | 9,226 | 6,510
Allowance for doubtful accounts | (7,242) | (6,148)
Regulatory assets | 36,530 | 32,871
Natural gas in storage, at average cost | 167,504 | 169,803
Materials and supplies, at average cost | 20,406 | 14,475
Prepaid expenses | 6,639 | 8,333
Prepaid and accrued taxes | 24,301 | 22,602
Derivatives, at fair value | 23,310 | 25,103
Restricted broker margin accounts | 69,444 | 73,723
Other current assets | 21,029 | 22,395
Total current assets | 622,332 | 511,606
NONCURRENT ASSETS |  |
Investments in equity investees | 208,375 | 200,268
Regulatory assets | 527,459 | 496,637
Operating lease assets | 131,769 | 0
Derivatives, at fair value | 3,349 | 7,426
Intangible assets | 10,060 | 14,611
Software costs | 4,707 | 1,702
Other noncurrent assets | 78,716 | 94,791
Total noncurrent assets | 964,435 | 815,435
Total assets | 5,569,802 | 4,372,985
CAPITALIZATION |  |
Common stock, $2.50 par value; authorized 150,000,000 shares; outstanding September 30, 2020 — 95,949,183; September 30, 2019 — 89,998,788 | 240,243 | 226,649
Premium on common stock | 491,982 | 291,331
Accumulated other comprehensive loss, net of tax | (44,315) | (31,787)
Treasury stock at cost and other; shares September 30, 2020 — 148,310; September 30, 2019 — 660,734 | 8,485 | (10,436)
Retained earnings | 1,148,297 | 1,075,960
Common stock equity | 1,844,692 | 1,551,717
Long-term debt | 2,259,466 | 1,537,177
Total capitalization | 4,104,158 | 3,088,894
CURRENT LIABILITIES |  |
Current maturities of long-term debt | 27,236 | 21,419
Short-term debt | 125,350 | 25,450
Natural gas purchases payable | 95,945 | 137,271
Natural gas purchases payable to related parties | 791 | 790
Accounts payable and other | 141,500 | 129,724
Dividends payable | 31,902 | 28,122
Accrued taxes | 2,717 | 3,394
Regulatory liabilities | 26,188 | 0
New Jersey Clean Energy Program | 15,570 | 15,468
Derivatives, at fair value | 33,865 | 57,623
Operating lease liabilities | 6,724 | 0
Customers’ credit balances and deposits | 25,934 | 27,116
Total current liabilities | 533,722 | 446,377
NONCURRENT LIABILITIES |  |
Deferred income taxes | 190,610 | 190,663
Deferred investment tax credits | 3,332 | 3,653
Deferred gain | 1,035 | 1,554
Derivatives, at fair value | 13,352 | 18,821
Manufactured gas plant remediation | 150,590 | 131,080
Postemployment employee benefit liability | 237,221 | 246,517
Regulatory liabilities | 196,450 | 202,435
Operating lease liabilities | 95,030 | 0
Asset retirement obligation | 33,723 | 31,046
Other noncurrent liabilities | 10,579 | 11,945
Total noncurrent liabilities | 931,922 | 837,714
Commitments and contingent liabilities |  |
Total capitalization and liabilities | $ 5,569,802 | $ 4,372,985

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