CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
ASSETS
Property, plant and equipment	$ 16,412,507	$ 15,957,221
Less accumulated depreciation and amortization	2,650,364	2,601,874
Net property, plant and equipment	13,762,143	13,355,347
Current assets
Cash and cash equivalents	457,599	20,808
Accounts receivable, net	492,526	230,595
Gas stored underground	99,569	111,950
Other current assets	142,594	107,905
Total current assets	1,192,288	471,258
Goodwill	731,257	731,257
Deferred charges and other assets	790,191	801,170
Total assets	16,475,879	15,359,032
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: 2020 — 125,882,477 shares; 2020 — 125,882,477 shares	641	629
Additional paid-in capital	4,600,314	4,377,149
Accumulated other comprehensive income (loss)	2,532	(57,589)
Retained earnings	2,609,669	2,471,014
Shareholders’ equity	7,213,156	6,791,203
Long-term debt	5,124,862	4,531,779
Total capitalization	12,338,018	11,322,982
Current liabilities
Accounts payable and accrued liabilities	284,995	235,775
Other current liabilities	512,673	546,461
Current maturities of long-term debt	171	165
Total current liabilities	797,839	782,401
Deferred income taxes	1,542,394	1,456,569
Regulatory excess deferred taxes	695,191	697,764
Regulatory cost of removal obligation	456,264	457,188
Deferred credits and other liabilities	646,173	642,128
Total shareholders' equity and liabilities	$ 16,475,879	$ 15,359,032