CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Unaudited - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net income	$ 33,585	$ 36,540
Adjustments to reconcile net income to net cash:
Depreciation and amortization	48,946	47,406
Change in value of life insurance contracts	(915)	758
Changes in operating assets and liabilities:
Receivables and unbilled revenue	(13,352)	(18,412)
Accounts payable	8,940	7,245
Other current assets	(1,743)	(2,428)
Other current liabilities	13,982	11,939
Other changes in noncurrent assets and liabilities	33,749	33,476
Net cash provided by operating activities	123,192	116,524
Investing activities:
Utility plant expenditures	(166,406)	(118,309)
Life insurance proceeds	495	0
Purchase of life insurance contracts	(2,710)	(1,855)
Change in restricted cash	(685)	(241)
Net cash used in investing activities	(169,306)	(120,405)
Financing activities:
Short-term borrowings	105,100	82,500
Repayment of short-term borrowings	(81,615)	(25,000)
Proceeds from long-term debt, net of issuance costs of $177 for 2016, $0 for 2015	49,823	50
Short-term borrowings issuance costs	0	(1,197)
Repayment of long-term debt	(2,865)	(2,878)
Advances and contributions in aid of construction	18,186	10,741
Refunds of advances for construction	(5,194)	(5,050)
Dividends paid	(24,807)	(24,047)
Net cash provided by financing activities	58,628	35,119
Change in cash and cash equivalents	12,514	31,238
Cash and cash equivalents at beginning of period	8,837	19,587
Cash and cash equivalents at end of period	21,351	50,825
Supplemental information:
Cash paid for interest (net of amounts capitalized)	13,889	13,618
Supplemental disclosure of non-cash activities:
Accrued payables for investments in utility plant	26,767	24,856
Utility plant contribution by developers	$ 12,104	$ 5,573