STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Proceeds from Issuance of Common Stock	$ 2,536	$ 2,390
Operating activities
Net income	118,130	111,254
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,789	78,647
Deferred income taxes	9,401	30,546
Share-based compensation expense	4,911	4,080
Provision for doubtful accounts	3,557	4,071
Changes in assets and liabilities:
Accounts receivable	122,063	130,730
Materials and supplies	(6,011)	3,548
Natural gas in storage	19,060	49,672
Asset removal costs	(24,324)	(25,774)
Accounts payable	(109,340)	(68,428)
Accrued taxes other than income	(10,328)	(6,393)
Customer deposits	(2,352)	438
Regulatory assets and liabilities	25,948	105,967
Other assets and liabilities	1,667	(18,401)
Cash provided by operating activities	241,171	399,957
Investing activities
Capital expenditures	(184,349)	(175,834)
Other	(3,583)	0
Proceeds from Sale of Other Assets, Investing Activities	598	0
Cash used in investing activities	(187,334)	(175,834)
Financing activities
Repayments of notes payable, net	(6,500)	(172,215)
Dividends paid	(52,687)	(48,272)
Tax withholdings related to net share settlements of stock compensation	(7,395)	(7,859)
Cash used in financing activities	(64,046)	(225,956)
Change in cash and cash equivalents	(10,209)	(1,833)
Cash and cash equivalents at beginning of period	21,323	14,413
Cash and cash equivalents at end of period	$ 11,114	$ 12,580