CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
ASSETS
Property, plant and equipment	$ 17,258,547	$ 15,539,166
Construction in progress	626,551	418,055
Total property, plant and equipment and construction in progress	17,885,098	15,957,221
Less accumulated depreciation and amortization	2,821,128	2,601,874
Net property, plant and equipment	15,063,970	13,355,347
Current assets
Cash and cash equivalents	116,723	20,808
Accounts receivable, less allowance for uncollectible accounts of $64,471 in 2021 and $29,949 in 2020	342,967	230,595
Gas stored underground	178,116	111,950
Other current assets (See Note 9)	2,200,909	107,905
Total current assets	2,838,715	471,258
Goodwill	731,257	731,257
Deferred charges and other assets (See Note 9)	974,720	801,170
Total assets	19,608,662	15,359,032
Shareholders’ equity
Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: 2021 — 132,419,754 shares; 2020 — 125,882,477 shares	662	629
Additional paid-in capital	5,023,751	4,377,149
Accumulated other comprehensive income (loss)	69,803	(57,589)
Retained earnings	2,812,673	2,471,014
Shareholders’ equity	7,906,889	6,791,203
Long-term debt	4,930,205	4,531,779
Total capitalization	12,837,094	11,322,982
Commitments and contingencies (See Note 13)
Current liabilities
Accounts payable and accrued liabilities	423,222	235,775
Other current liabilities	686,681	546,461
Current maturities of long-term debt	2,400,452	165
Total current liabilities	3,510,355	782,401
Deferred income taxes	1,705,809	1,456,569
Regulatory excess deferred taxes (See Note 14)	549,227	697,764
Regulatory cost of removal obligation	468,688	457,188
Deferred credits and other liabilities	537,489	642,128
Total shareholders' equity and liabilities	$ 19,608,662	$ 15,359,032