Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 315,334	$ 199,877
Restricted cash	4,216	5,050
Accounts receivable and unbilled revenues, net	435,158	511,903
Available-for-sale investment securities, at fair value	1,419,755	1,429,667
Held-to-maturity investment securities, at amortized cost	1,238,185	1,251,747
Stock in Federal Home Loan Bank, at cost	10,000	26,560
Loans held for investment, net	5,988,058	5,906,690
Loans held for sale, at lower of cost or fair value	660	824
Property, plant and equipment, net of accumulated depreciation	5,778,571	5,687,003
Operating lease right-of-use assets	110,920	115,684
Regulatory assets	247,902	242,513
Other	812,836	824,536
Goodwill	82,190	82,190
Total assets	16,443,785	16,284,244
Liabilities
Accounts payable	237,822	251,460
Interest and dividends payable	41,382	21,333
Deposit liabilities	8,230,601	8,169,696
Short-term borrowings—other than bank	148,802	172,568
Other bank borrowings	680,690	695,120
Long-term debt, net—other than bank	2,480,948	2,384,980
Deferred income taxes	273,081	262,462
Operating lease liabilities	121,323	126,604
Finance lease liabilities	88,024	48,709
Regulatory liabilities	1,069,551	1,055,650
Defined benefit pension and other postretirement benefit plans liability	71,394	71,813
Other	727,919	787,057
Total liabilities	14,171,537	14,047,452
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies (Notes 3 and 4)
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 109,572,075 shares and 109,470,795 shares at March 31, 2023 and December 31, 2022, respectively	1,692,390	1,692,697
Retained earnings	861,105	845,830
Accumulated other comprehensive loss, net of tax benefits	(315,540)	(336,028)
Total shareholders’ equity	2,237,955	2,202,499
Total liabilities and shareholders’ equity	$ 16,443,785	$ 16,284,244