CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 81,334	$ 51,780
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75,550	68,522
Change in value of life insurance contracts	(621)	(3,433)
Allowance for equity funds used during construction	(4,292)	(5,087)
Changes in operating assets and liabilities:
Receivables and unbilled revenue	(41,374)	(29,436)
Accounts payable	7,199	16,735
Other current assets	(536)	(3,937)
Other current liabilities	16,304	11,597
Other changes in noncurrent assets and liabilities	(36,900)	21,602
Net cash provided by operating activities	96,664	128,343
Investing activities:
Utility plant expenditures	(221,261)	(194,942)
Purchase of life insurance contracts	(2,335)	(2,216)
Business acquisition, net of cash acquired	(39,544)	0
Net cash used in investing activities	(263,140)	(197,158)
Financing activities:
Short-term borrowings	270,000	210,000
Repayment of short-term borrowings	(70,000)	(120,000)
Issuance of long-term debt, net of expenses	0	398,431
Repayment of long-term debt	(1,535)	(401,630)
Advances and contributions in aid of construction	19,862	21,266
Refunds of advances for construction	(7,017)	(5,560)
Repurchase of common stock	(1,578)	(2,355)
Issuance of common stock	58,573	1,278
Dividends paid	(31,177)	(28,507)
Net cash provided by financing activities	237,128	72,923
Change in cash, cash equivalents, and restricted cash	70,652	4,108
Cash, cash equivalents, and restricted cash at beginning of period	43,298	47,715
Cash, cash equivalents, and restricted cash at end of period	113,950	51,823
Supplemental information:
Cash paid for interest (net of amounts capitalized)	21,862	22,060
Supplemental disclosure of non-cash activities:
Accrued payables for investments in utility plant	47,015	31,676
Utility plant contribution by developers	$ 22,762	$ 23,955