CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Unaudited - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 53,512	$ 33,585
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	59,016	48,946
Change in value of life insurance contracts	(1,871)	(915)
Allowance for equity funds used during construction	(2,763)	0
Changes in operating assets and liabilities:
Receivables and unbilled revenue	(52,951)	(13,352)
Accounts payable	6,712	8,940
Other current assets	(4,643)	(1,743)
Other current liabilities	10,939	13,982
Other changes in noncurrent assets and liabilities	41,837	34,386
Net cash provided by operating activities	109,788	123,829
Investing activities:
Utility plant expenditures	(180,442)	(166,406)
Life insurance proceeds	1,558	495
Purchase of life insurance contracts	(3,948)	(2,710)
Change in restricted cash	(679)	(685)
Net cash used in investing activities	(183,511)	(169,306)
Financing activities:
Short-term borrowings	185,000	105,100
Repayment of short-term borrowings	(87,000)	(81,615)
Proceeds from long-term debt, net of issuance costs of $0 for 2017 and $177 for 2016	0	49,823
Repayment of long-term debt	(2,797)	(2,865)
Advances and contributions in aid of construction	14,964	18,186
Refunds of advances for construction	(6,316)	(5,194)
Repurchase of common stock	(1,359)	(637)
Dividends paid	(25,920)	(24,807)
Net cash provided by financing activities	76,572	57,991
Change in cash and cash equivalents	2,849	12,514
Cash and cash equivalents at beginning of period	25,492	8,837
Cash and cash equivalents at end of period	28,341	21,351
Supplemental information:
Cash paid for interest (net of amounts capitalized)	17,287	13,889
Income tax refund	(1,697)	0
Supplemental disclosure of non-cash activities:
Accrued payables for investments in utility plant	31,750	26,767
Utility plant contribution by developers	$ 13,022	$ 12,104