Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 196,813,000	$ 169,208,000
Restricted cash	30,872,000	0
Accounts receivable and unbilled revenues, net	300,794,000	325,672,000
Available-for-sale investment securities, at fair value	1,232,826,000	1,388,533,000
Held-to-maturity investment securities, at amortized cost	139,451,000	141,875,000
Stock in Federal Home Loan Bank, at cost	8,434,000	9,958,000
Loans held for investment, net	5,067,821,000	4,790,902,000
Loans held for sale, at lower of cost or fair value	12,286,000	1,805,000
Property, plant and equipment, net
Land	100,161,000	102,925,000
Plant and equipment	7,545,083,000	7,118,709,000
Construction in progress	229,953,000	267,714,000
Property, plant and equipment, gross	7,875,197,000	7,489,348,000
Less – accumulated depreciation	(2,765,569,000)	(2,659,230,000)
Total property, plant and equipment, net	5,109,628,000	4,830,118,000
Operating lease right-of-use-assets	199,171,000
Regulatory assets	715,080,000	833,426,000
Other	649,885,000	530,364,000
Goodwill	82,190,000	82,190,000
Total assets	13,745,251,000	13,104,051,000
Liabilities
Accounts payable	220,633,000	214,773,000
Interest and dividends payable	24,941,000	28,254,000
Deposit liabilities	6,271,902,000	6,158,852,000
Short-term borrowings—other than bank	185,710,000	73,992,000
Other bank borrowings	115,110,000	110,040,000
Long-term debt, net—other than bank	1,964,365,000	1,879,641,000
Deferred income taxes	379,324,000	372,518,000
Operating lease, liability	199,571,000
Regulatory liabilities	972,310,000	950,236,000
Defined benefit pension and other postretirement benefit plans liability	513,287,000	538,384,000
Other	583,545,000	580,788,000
Total liabilities	11,430,698,000	10,907,478,000
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293,000	34,293,000
Commitments and contingencies
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: 108,973,328 shares and 108,879,245 shares at December 31, 2019 and 2018, respectively	1,678,257,000	1,669,267,000
Retained earnings	622,042,000	543,623,000
Accumulated other comprehensive loss, net of tax benefits
Net unrealized gains (losses) on securities	2,481,000	(24,423,000)
Unrealized losses on derivatives	(1,613,000)	(436,000)
Retirement benefit plans	(20,907,000)	(25,751,000)
Accumulated other comprehensive loss, net of tax benefits	(20,039,000)	(50,610,000)
Total shareholders’ equity	2,280,260,000	2,162,280,000
Total capitalization and liabilities	$ 13,745,251,000	$ 13,104,051,000