Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidated Balance Sheet (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 3,657,000	$ 15,013,000		$ 2,830,000	$ 6,352,000
Accounts receivable	50,408,000	41,075,000
Prepaid and other current assets	2,888,000	5,054,000
Total current assets	56,953,000	61,142,000
Properties and equipment, net	1,328,395,000	1,293,060,000	[1]
Investments in subsidiaries	0	0
Transportation agreements, net	66,856,000	73,805,000
Goodwill	256,498,000	256,498,000
Equity Method Investments	165,609,000.00	79,438,000
Other assets	9,926,000	13,703,000
Total assets	1,884,237,000	1,777,646,000	[1]
Current liabilities:
Accounts payable	26,942,000	22,583,000	[1]
Accrued interest	18,069,000	6,752,000
Deferred revenue	11,102,000	12,016,000
Accrued property taxes	5,397,000	3,764,000
Other current liabilities	3,225,000	3,809,000
Total current liabilities	64,735,000	48,924,000	[1]
Long-term debt	1,243,912,000	1,008,752,000
Other long-term liabilities	16,445,000	20,744,000
Deferred Revenue	47,035,000	39,063,000
Class B unit	40,319,000	33,941,000
Equity - partners	378,234,000	531,793,000	[1]
Equity - noncontrolling interest	93,557,000	94,429,000
Total liabilities and equity	1,884,237,000	1,777,646,000	[1]
Parent [Member]
Current assets:
Cash and cash equivalents	2,000	2,000		2,000	2,000
Accounts receivable	0	0
Prepaid and other current assets	11,000	174,000
Total current assets	13,000	176,000
Properties and equipment, net	0	0
Investments in subsidiaries	1,086,008,000	834,444,000
Transportation agreements, net	0	0
Goodwill	0	0
Equity Method Investments	0	0
Other assets	725,000	642,000
Total assets	1,086,746,000	835,262,000
Current liabilities:
Accounts payable	0	0
Accrued interest	17,300,000	6,500,000
Deferred revenue	0	0
Accrued property taxes	0	0
Other current liabilities	14,000	7,000
Total current liabilities	17,314,000	6,507,000
Long-term debt	690,912,000	296,752,000
Other long-term liabilities	286,000	210,000
Deferred Revenue	0	0
Class B unit	0	0
Equity - partners	378,234,000	531,793,000
Equity - noncontrolling interest	0	0
Total liabilities and equity	1,086,746,000	835,262,000
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	301,000	5,452,000		2,828,000	1,447,000
Accounts receivable	45,056,000	35,558,000
Prepaid and other current assets	2,633,000	3,634,000
Total current assets	47,990,000	44,644,000
Properties and equipment, net	957,045,000	921,217,000
Investments in subsidiaries	280,671,000	283,287,000
Transportation agreements, net	66,856,000	73,805,000
Goodwill	256,498,000	256,498,000
Equity Method Investments	165,609,000	79,438,000
Other assets	9,201,000	13,061,000
Total assets	1,783,870,000	1,671,950,000
Current liabilities:
Accounts payable	24,245,000	19,448,000
Accrued interest	769,000	252,000
Deferred revenue	8,797,000	6,010,000
Accrued property taxes	4,514,000	2,627,000
Other current liabilities	3,208,000	3,802,000
Total current liabilities	41,533,000	32,139,000
Long-term debt	553,000,000	712,000,000
Other long-term liabilities	15,975,000	20,363,000
Deferred Revenue	47,035,000	39,063,000
Class B unit	40,319,000	33,941,000
Equity - partners	1,086,008,000	834,444,000
Equity - noncontrolling interest	0	0
Total liabilities and equity	1,783,870,000	1,671,950,000
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	3,354,000	9,559,000		0	4,903,000
Accounts receivable	5,554,000	5,715,000
Prepaid and other current assets	244,000	1,246,000
Total current assets	9,152,000	16,520,000
Properties and equipment, net	371,350,000	371,843,000
Investments in subsidiaries	0	0
Transportation agreements, net	0	0
Goodwill	0	0
Equity Method Investments	0	0
Other assets	0	0
Total assets	380,502,000	388,363,000
Current liabilities:
Accounts payable	2,899,000	3,333,000
Accrued interest	0	0
Deferred revenue	2,305,000	6,006,000
Accrued property taxes	883,000	1,137,000
Other current liabilities	3,000	0
Total current liabilities	6,090,000	10,476,000
Long-term debt	0	0
Other long-term liabilities	184,000	171,000
Deferred Revenue	0	0
Class B unit	0	0
Equity - partners	280,671,000	283,287,000
Equity - noncontrolling interest	93,557,000	94,429,000
Total liabilities and equity	380,502,000	388,363,000
Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0		$ 0	$ 0
Accounts receivable	(202,000)	(198,000)
Prepaid and other current assets	0	0
Total current assets	(202,000)	(198,000)
Properties and equipment, net	0	0
Investments in subsidiaries	(1,366,679,000)	(1,117,731,000)
Transportation agreements, net	0	0
Goodwill	0	0
Equity Method Investments	0	0
Other assets	0	0
Total assets	(1,366,881,000)	(1,117,929,000)
Current liabilities:
Accounts payable	(202,000)	(198,000)
Accrued interest	0	0
Deferred revenue	0	0
Accrued property taxes	0	0
Other current liabilities	0	0
Total current liabilities	(202,000)	(198,000)
Long-term debt	0	0
Other long-term liabilities	0	0
Deferred Revenue	0	0
Class B unit	0	0
Equity - partners	(1,366,679,000)	(1,117,731,000)
Equity - noncontrolling interest	0	0
Total liabilities and equity	$ (1,366,881,000)	$ (1,117,929,000)

[1] (1) Retrospectively adjusted as described in Note 2.