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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands | Dec. 31, 2019 | Sep. 30, 2019
--- | --- | ---
PROPERTY, PLANT AND EQUIPMENT |  |
Utility plant, at cost | $ 2,638,798 | $ 2,625,730
Construction work in progress | 267,774 | 232,233
Nonutility plant and equipment, at cost | 1,247,107 | 861,904
Construction work in progress | 81,590 | 62,492
Total property, plant and equipment | 4,235,269 | 3,782,359
Accumulated depreciation and amortization, utility plant | (572,144) | (585,160)
Accumulated depreciation and amortization, nonutility plant and equipment | (166,932) | (156,033)
Property, plant and equipment, net | 3,496,193 | 3,041,166
CURRENT ASSETS |  |
Cash and cash equivalents | 15,666 | 2,676
Customer accounts receivable |  |
Billed | 250,419 | 139,263
Unbilled revenues | 63,656 | 6,510
Allowance for doubtful accounts | (6,423) | (6,148)
Regulatory assets | 24,246 | 32,871
Gas in storage, at average cost | 186,895 | 169,803
Materials and supplies, at average cost | 14,617 | 14,475
Prepaid expenses | 20,815 | 8,333
Prepaid and accrued taxes | 9,162 | 22,602
Derivatives, at fair value | 48,552 | 25,103
Restricted broker margin accounts | 43,112 | 73,723
Other | 21,894 | 22,395
Total current assets | 692,611 | 511,606
NONCURRENT ASSETS |  |
Investments in equity method investees | 202,231 | 200,268
Regulatory assets | 490,283 | 496,637
Derivatives, at fair value | 5,594 | 7,426
Intangible assets, net | 15,757 | 14,611
Operating lease assets | 87,793 |
Other noncurrent assets | 104,704 | 101,271
Total noncurrent assets | 906,362 | 820,213
Total assets | 5,095,166 | 4,372,985
CAPITALIZATION |  |
Common stock, $2.50 par value; authorized 150,000,000 shares; outstanding December 31, 2019 — 95,508,010; September 30, 2019 — 89,998,788 | 240,221 | 226,649
Premium on common stock | 494,265 | 291,331
Accumulated other comprehensive loss, net of tax | (31,028) | (31,787)
Treasury stock at cost and other; shares December 31, 2019 — 580,603; September 30, 2019 —660,734 | (11,130) | (10,436)
Retained earnings | 1,135,475 | 1,075,960
Common stock equity | 1,827,803 | 1,551,717
Long-term debt | 1,537,549 | 1,537,177
Total capitalization | 3,365,352 | 3,088,894
CURRENT LIABILITIES |  |
Current maturities of long-term debt | 21,797 | 21,419
Short-term debt | 390,709 | 25,450
Gas purchases payable | 181,356 | 137,271
Gas purchases payable to related parties | 791 | 790
Accounts payable and other | 91,580 | 129,724
Dividends payable | 29,846 | 28,122
Accrued taxes | 5,342 | 3,394
New Jersey Clean Energy Program | 13,757 | 15,468
Derivatives, at fair value | 36,987 | 57,623
Operating lease liabilities | 3,805 |
Customers' credit balances and deposits | 29,573 | 27,116
Total current liabilities | 805,543 | 446,377
NONCURRENT LIABILITIES |  |
Deferred income taxes | 194,284 | 190,663
Deferred investment tax credits | 3,573 | 3,653
Deferred gain | 1,358 | 1,554
Derivatives, at fair value | 25,073 | 18,821
Manufactured gas plant remediation | 129,241 | 131,080
Postemployment employee benefit liability | 245,455 | 246,517
Regulatory liabilities | 203,313 | 202,435
Asset retirement obligation | 31,503 | 31,046
Operating lease liabilities | 82,909 |
Other | 7,562 | 11,945
Total noncurrent liabilities | 924,271 | 837,714
Commitments and contingent liabilities (Note 13) |  |
Total capitalization and liabilities | $ 5,095,166 | $ 4,372,985

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- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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