Statement of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES:
Net income	$ 83,139	$ 85,663
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	49,398	47,740
Regulatory debits	762	350
Gain on sale of property, plant and equipment	(70)	0
Amortization of deferred charges and credits	704	830
Allowance for equity funds used during construction	(169)	(436)
Changes in current assets and liabilities:
Trade and other accounts receivable	2,775	595
Affiliated receivables	37,737	(570)
Exchange gas due from others	(1,043)	3,647
Materials and supplies	16	(183)
Other current assets	(218)	(990)
Trade accounts payable	(4,062)	(2,686)
Affiliated payables	(622)	(749)
Exchange gas due to others	1,424	(3,647)
Other accrued liabilities	(1,566)	1,974
Changes in noncurrent assets and liabilities:
Deferred charges	(1,885)	(3,434)
Noncurrent liabilities	4,847	4,193
Net cash provided by operating activities	171,167	132,297
FINANCING ACTIVITIES:
Cash distributions to parent	(104,000)	(27,000)
Other	(656)	(2,194)
Net cash used in financing activities	(104,656)	(29,194)
Property, plant and equipment:
Capital expenditures, net of equity AFUDC	(19,756)	(21,898)
Proceeds from sales	2,364	1,651
Advances to affiliates, net	(49,089)	(82,873)
Net cash used in investing activities	(66,481)	(103,120)
NET INCREASE (DECREASE) IN CASH	30	(17)
CASH AT BEGINNING OF PERIOD	133	117
CASH AT END OF PERIOD	163	100
Increases to property, plant and equipment	(20,388)	(27,471)
Changes in related accounts payable and accrued liabilities	632	5,573
Capital expenditures, net of equity AFUDC	$ (19,756)	$ (21,898)