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