CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities
Net income	$ 14,909	$ 12,399
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,837	22,857
Gain on sale of non-utility property	(62)
Change in value of life insurance contracts	(40)	83
Other changes in noncurrent assets and liabilities	8,625	(1,008)
Changes in operating assets and liabilities:
Receivables	(11,489)	(2,095)
Accounts payable	10,254	5,327
Other current assets	(3,088)	(1,509)
Other current liabilities	3,735	(1,347)
Other changes, net	(1,014)	(1,851)
Net adjustments	32,758	20,457
Net cash provided by operating activities	47,667	32,856
Investing activities:
Utility plant expenditures	(52,268)	(60,458)
Purchase of life insurance	(1,658)	(1,706)
Proceeds on sale of non-utility property	63
Restricted cash (increase)	(220)	(13)
Net cash used in investing activities	(54,083)	(62,177)
Financing activities:
Short-term borrowings, net	9,010	43,150
Proceeds from long-term debt	110	7,903
Repayment of long-term debt	(1,326)	(12,187)
Advances and contributions in aid of construction	5,061	1,620
Refunds of advances for construction	(3,008)	(3,018)
Dividends paid	(12,826)	(12,367)
Net cash (used in) provided by financing activities	(2,979)	25,101
Change in cash and cash equivalents	(9,395)	(4,220)
Cash and cash equivalents at beginning of period	42,277	9,866
Cash and cash equivalents at end of period	32,882	5,646
Supplemental information
Cash paid for interest (net of amounts capitalized)	12,983	11,316
Cash paid for income taxes	26	45
Refund for income taxes	4,000
Supplemental disclosure of non-cash activities:
Accrued payables for investments in utility plant	6,614	8,755
Utility plant contribution by developers	$ 7,746	$ 23,239