BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, plant and equipment
Property, plant and equipment	$ 4,782,857	$ 4,534,074
Accumulated depreciation and amortization	1,545,828	1,489,216
Net property, plant and equipment	3,237,029	3,044,858
Current assets
Cash and cash equivalents	59,685	3,171
Accounts receivable, net	135,750	356,988
Natural gas in storage	217,320	166,128
Regulatory assets (Note 2)	51,900	21,657
Other current assets	40,527	54,240
Total current assets	505,182	602,184
Goodwill and other assets
Regulatory assets (Note 2)	312,023	23,822
Goodwill	157,953	157,953
Other assets	52,790	17,658
Total goodwill and other assets	522,766	199,433
Total assets	4,264,977	3,846,475
Equity and long-term debt
Preferred stock, $0.01 par value: authorized 50,000,000 shares; no shares issued	0	0
Common stock, $0.01 par value: authorized 250,000,000 shares; issued and outstanding 52,045,742 shares at September 30, 2014; authorized 1,000 shares, issued and outstanding 100 shares at December 31, 2013	520	0
Paid-in Capital	1,755,539	0
Retained earnings	18,486	0
Accumulated other comprehensive income (loss)	(3,549)	0
Owner's net investment	0	1,239,023
Total equity	1,770,996	1,239,023
Long-term debt, excluding current maturities	1,201,313	1,318
Long-term line of credit with ONEOK	0	1,027,631
Total equity and long-term debt	2,972,309	2,267,972
Current liabilities
Current maturities of long-term debt	6	6
Short-term note payable to ONEOK	0	444,960
Affiliate payable	0	22,403
Accounts payable	97,653	169,500
Accrued taxes other than income	43,486	32,426
Accrued liabilities	20,768	4,791
Customer deposits	57,317	57,360
Regulatory liabilities	33,546	17,796
Other current liabilities	21,372	19,835
Total current liabilities	274,148	769,077
Deferred credits and other liabilities [Abstract]
Deferred income taxes	835,345	743,452
Other deferred credits	183,175	65,974
Total deferred credits and other liabilities	1,018,520	809,426
Commitments and contingencies (Note 7)
Total liabilities and equity	$ 4,264,977	$ 3,846,475