Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 143,993	$ 137,449	$ 118,947
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	144,220	153,478	156,397
Gain on derivatives, net	(9,173)	(23,226)	(22,782)
Loss on early extinguishment of debt (Note 6)	4,382	300	832
Amortization of deferred financing costs	6,909	6,132	5,332
Changes in assets and liabilities:
Accounts receivable, net	(10,579)	(2,788)	2,168
Accounts receivable - affiliates		4,444	(4,444)
Prepaid expenses and other assets	(4,347)	880	(1,377)
Accounts payable, accrued expenses and other current liabilities	10,207	1,605	(7,838)
Accounts payable - affiliates	9,177	1,513
Deferred revenue	1,659	646	1,040
Other non-current liabilities	788	(141)	(183)
Net cash flows provided by operating activities	297,236	280,292	248,092
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(151,204)	(137,275)	(143,444)
Change in accrued property, plant and equipment	4,890	(315)	(2,574)
Proceeds from sale of assets	272
Acquisition of other intangible assets	(1,559)
Other, net	(688)	19
Net cash flows used in investing activities	(148,289)	(137,571)	(146,018)
CASH FLOWS FROM FINANCING ACTIVITIES:
New borrowings of bank debt	430,125	853,750	835,000
Repayment of bank debt	(557,375)	(1,004,750)	(886,000)
Issuance of senior notes		200,000
Dividend payments on preferred members' interest (Note 7)	(18,000)	(18,000)	(18,000)
Capital distributions to parent (Note 8)	0	(163,300)	(29,000)
Financing costs	(2,299)	(12,480)	(5,284)
Other financing activities	(408)	274	651
Net cash flows used in financing activities	(147,957)	(144,506)	(102,633)
Net increase (decrease) in cash	990	(1,785)	(559)
CASH, beginning of year	9,452	11,237	11,796
CASH, end of year	10,442	9,452	11,237
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest, net of amounts capitalized	$ 82,753	$ 92,739	$ 92,565