Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 118,415,000	$ 98,906,000
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	108,157,000	108,126,000
Loss (gain) on derivatives, net	4,313,000	(1,165,000)
Loss on early extinguishment of debt (Note 6)	1,156,000
Amortization of deferred financing costs	4,325,000	5,219,000
Changes in assets and liabilities:
Accounts receivable, net	2,436,000	(10,611,000)
Prepaid expenses and other assets	(1,984,000)	(4,349,000)
Accounts payable, accrued expenses and other current liabilities	10,425,000	13,132,000
Accounts payable - affiliates	1,114,000	11,396,000
Deferred revenue	1,749,000	1,182,000
Other non-current liabilities	(94,000)	2,000
Net cash flows provided by operating activities	250,012,000	221,838,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(131,480,000)	(111,386,000)
Change in accrued property, plant and equipment	(503,000)	519,000
Proceeds from sale of assets	159,000	139,000
Acquisition of other intangible assets		(1,559,000)
Net cash flows used in investing activities	(131,824,000)	(112,287,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
New borrowings of bank debt	328,431,000	163,625,000
Repayment of bank debt	(503,181,000)	(259,125,000)
Capital contributions from parent (Notes 6 and 8)	75,000,000	0
Capital distributions to parent (Note 8)	(6,175,000)	0
Dividend payments on preferred members' interest (Note 7)	(13,500,000)	(13,500,000)
Financing costs		(89,000)
Other financing activities	759,000	(210,000)
Net cash flows used in financing activities	(118,666,000)	(109,299,000)
Net change in cash	(478,000)	252,000
CASH, beginning of period	10,442,000	9,452,000
CASH, end of period	9,964,000	9,704,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest, net of amounts capitalized	$ 53,906,000	$ 58,662,000