CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
PROPERTY, PLANT AND EQUIPMENT
Utility plant, at cost	$ 2,273,071	$ 2,241,324
Construction work in progress	121,679	119,318
Solar and wind equipment, real estate properties and other, at cost	848,900	843,142
Construction work in progress	28,566	7,286
Total property, plant and equipment	3,272,216	3,211,070
Accumulated depreciation and amortization, utility plant	(501,663)	(489,122)
Accumulated depreciation and amortization, solar and wind equipment, real estate properties and other	(121,260)	(112,207)
Property, plant and equipment, net	2,649,293	2,609,741
CURRENT ASSETS
Cash and cash equivalents	4,738	2,226
Customer accounts receivable
Billed	325,406	196,467
Unbilled revenues	70,138	7,202
Allowance for doubtful accounts	(5,274)	(5,181)
Regulatory assets	41,574	50,791
Gas in storage, at average cost	203,447	202,063
Materials and supplies, at average cost	13,121	11,944
Prepaid and accrued taxes	39,581	24,764
Derivatives, at fair value	46,299	30,081
Restricted broker margin accounts	52,850	25,827
Other	34,199	33,260
Total current assets	826,079	579,444
NONCURRENT ASSETS
Investments in equity method investees	179,429	172,585
Regulatory assets	362,150	375,919
Derivatives, at fair value	5,537	9,164
Available for sale securities	55,995	65,752
Intangible assets	37,693	41,084
Other noncurrent assets	70,752	74,818
Total noncurrent assets	711,556	739,322
Total assets	4,186,928	3,928,507
CAPITALIZATION
Common stock, $2.50 par value; authorized 150,000,000 shares; outstanding December 31, 2017 — 87,475,456; September 30, 2017 — 86,555,507	225,095	222,258
Premium on common stock	255,142	219,696
Accumulated other comprehensive loss, net of tax	(8,460)	(3,256)
Treasury stock at cost and other; shares December 31, 2017 — 2,507,313; September 30, 2017 — 2,347,380	(91,859)	(70,039)
Retained earnings	967,852	867,984
Common stock equity	1,347,770	1,236,643
Long-term debt	1,001,183	997,080
Total capitalization	2,348,953	2,233,723
CURRENT LIABILITIES
Current maturities of long-term debt	166,167	165,375
Short-term debt	373,200	266,000
Gas purchases payable	203,401	160,115
Gas purchases payable to related parties	1,150	1,152
Accounts payable and other	75,924	96,878
Dividends payable	23,831	23,586
Accrued taxes	4,430	2,031
Regulatory liabilities	434	78
New Jersey clean energy program	12,626	14,202
Derivatives, at fair value	96,788	46,544
Customers' credit balances and deposits	33,050	26,957
Total current liabilities	991,001	802,918
NONCURRENT LIABILITIES
Deferred income taxes	238,367	514,708
Deferred investment tax credits	4,216	4,297
Deferred gain	27,531	27,728
Derivatives, at fair value	25,759	11,330
Manufactured gas plant remediation	144,046	149,000
Postemployment employee benefit liability	128,574	128,888
Regulatory liabilities	237,838	14,507
Asset retirement obligation	31,792	31,420
Other	8,851	9,988
Total noncurrent liabilities	846,974	891,866
Commitments and contingent liabilities (Note 12)
Total capitalization and liabilities	$ 4,186,928	$ 3,928,507