STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities
Net income	$ 79,828	$ 73,183
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	98,592	93,995
Deferred income taxes	19,384	2,828
Share-based compensation expense	3,863	5,651
Provision for doubtful accounts	2,951	5,019
Changes in assets and liabilities:
Accounts receivable	220,392	216,219
Materials and supplies	(5,889)	6,238
Income tax receivable	20,075	(4,862)
Natural gas in storage	25,388	(51,192)
Asset removal costs	(33,744)	(34,963)
Accounts payable	(104,948)	(70,063)
Accrued interest	(11,225)	7,521
Accrued taxes other than income	(4,313)	11,060
Accrued liabilities	(8,019)	15,977
Customer deposits	(1,672)	(43)
Regulatory assets and liabilities	64,368	23,308
Other assets and liabilities	(15,493)	(49,868)
Cash provided by operating activities	349,538	250,008
Investing activities
Capital expenditures	(199,678)	(224,619)
Cash used in investing activities	(199,678)	(224,619)
Financing activities
Repayments on notes payable, net	(42,000)	0
Repurchase of common stock	(24,122)	0
Issuance of debt, net of discounts	0	1,199,994
Long-term debt financing costs	0	(11,078)
Cash Payment to ONEOK Upon Separation	0	(1,130,000)
Issuance of common stock	4,471	1,330
Dividends paid	(47,178)	(29,121)
Cash provided by (used in) financing activities	(108,829)	31,125
Change in cash and cash equivalents	41,031	56,514
Cash and cash equivalents at beginning of period	11,943	3,171
Cash and cash equivalents at end of period	$ 52,974	$ 59,685