Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 18,091	$ 13,287	$ 7,469	$ 3,045
Accounts receivable	60,361	68,447
Prepaid and other current assets	6,282	7,629
Total current assets	84,734	89,363
Properties and equipment, net	1,447,924	1,467,099
Operating lease right-of-use assets	3,164	3,255
Net Investment in Lease	167,238	134,886
Investment in subsidiaries	0	0
Intangible assets, net	90,817	101,322
Goodwill	234,684	270,336
Equity method investments	122,046	120,071
Other assets	11,278	12,900
Assets	2,161,885	2,199,232
Current liabilities:
Accounts payable	27,944	34,555
Due to Affiliate	6,900	16,700
Accrued interest	4,691	13,206
Deferred revenue	11,020	10,390
Accrued property taxes	8,972	3,799
Current maturities of operating leases	1,199	1,126
Current maturities of finance leases	3,459	3,224
Other current liabilities	2,849	2,305
Total current liabilities	60,134	68,605
Long-term debt	1,439,874	1,462,031
Noncurrent operating lease liabilities	2,333	2,482
Noncurrent finance lease liabilities	69,180	70,475
Other long-term liabilities	13,861	12,808
Deferred revenue	41,376	45,681
Class B unit	51,956	49,392
Equity - partners	364,821	381,103
Equity - noncontrolling interest	118,350	106,655
Total liabilities and equity	2,161,885	2,199,232
Parent
Current assets:
Cash and cash equivalents	4,000	4,790	5,603	2
Accounts receivable	0	0
Prepaid and other current assets	149	282
Total current assets	4,149	5,072
Properties and equipment, net	0	0
Operating lease right-of-use assets	0	0
Net Investment in Lease	0	0
Investment in subsidiaries	1,800,621	1,844,812
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	0	0
Other assets	4,879	6,722
Assets	1,809,649	1,856,606
Current liabilities:
Accounts payable	0	0
Accrued interest	4,691	13,206
Deferred revenue	0	0
Accrued property taxes	0	0
Current maturities of operating leases	0	0
Current maturities of finance leases	0	0
Other current liabilities	3	6
Total current liabilities	4,694	13,212
Long-term debt	1,439,874	1,462,031
Noncurrent operating lease liabilities	0	0
Noncurrent finance lease liabilities	0	0
Other long-term liabilities	260	260
Deferred revenue	0	0
Class B unit	0	0
Equity - partners	364,821	381,103
Equity - noncontrolling interest	0	0
Total liabilities and equity	1,809,649	1,856,606
Guarantor Restricted Subsidiaries
Current assets:
Cash and cash equivalents	(1,113)	(709)	(1,043)	0
Accounts receivable	56,434	60,229
Prepaid and other current assets	5,818	6,710
Total current assets	61,139	66,230
Properties and equipment, net	1,096,454	1,133,534
Operating lease right-of-use assets	2,990	3,243
Net Investment in Lease	167,238	134,886
Investment in subsidiaries	280,277	275,279
Intangible assets, net	90,817	101,322
Goodwill	234,684	270,336
Equity method investments	82,389	82,987
Other assets	6,399	6,178
Assets	2,022,387	2,073,995
Current liabilities:
Accounts payable	20,494	29,895
Accrued interest	0	0
Deferred revenue	10,620	9,740
Accrued property taxes	5,377	2,737
Current maturities of operating leases	1,130	1,114
Current maturities of finance leases	3,459	3,224
Other current liabilities	2,748	2,293
Total current liabilities	43,828	49,003
Long-term debt	0	0
Noncurrent operating lease liabilities	2,333	2,482
Noncurrent finance lease liabilities	69,180	70,475
Other long-term liabilities	13,093	12,150
Deferred revenue	41,376	45,681
Class B unit	51,956	49,392
Equity - partners	1,800,621	1,844,812
Equity - noncontrolling interest	0	0
Total liabilities and equity	2,022,387	2,073,995
Non-Guarantor Non-Restricted Subsidiaries
Current assets:
Cash and cash equivalents	15,204	9,206	2,909	3,043
Accounts receivable	4,982	8,549
Prepaid and other current assets	315	637
Total current assets	20,501	18,392
Properties and equipment, net	351,470	333,565
Operating lease right-of-use assets	174	12
Net Investment in Lease		0
Investment in subsidiaries	0	0
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	39,657	37,084
Other assets	0	0
Assets	411,802	389,053
Current liabilities:
Accounts payable	8,505	4,991
Accrued interest	0	0
Deferred revenue	400	650
Accrued property taxes	3,595	1,062
Current maturities of operating leases	69	12
Current maturities of finance leases	0	0
Other current liabilities	98	6
Total current liabilities	12,667	6,721
Long-term debt	0	0
Noncurrent operating lease liabilities	0	0
Noncurrent finance lease liabilities	0	0
Other long-term liabilities	508	398
Deferred revenue	0	0
Class B unit	0	0
Equity - partners	280,277	275,279
Equity - noncontrolling interest	118,350	106,655
Total liabilities and equity	411,802	389,053
Eliminations
Current assets:
Cash and cash equivalents	0	0	$ 0	$ 0
Accounts receivable	(1,055)	(331)
Prepaid and other current assets		0
Total current assets	(1,055)	(331)
Properties and equipment, net	0	0
Operating lease right-of-use assets	0	0
Net Investment in Lease	0	0
Investment in subsidiaries	(2,080,898)	(2,120,091)
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	0	0
Other assets	0	0
Assets	(2,081,953)	(2,120,422)
Current liabilities:
Accounts payable	(1,055)	(331)
Accrued interest	0	0
Deferred revenue	0	0
Accrued property taxes	0	0
Current maturities of operating leases	0	0
Current maturities of finance leases	0	0
Other current liabilities	0	0
Total current liabilities	(1,055)	(331)
Long-term debt	0	0
Noncurrent operating lease liabilities	0	0
Noncurrent finance lease liabilities	0	0
Other long-term liabilities	0	0
Deferred revenue	0	0
Class B unit	0	0
Equity - partners	(2,080,898)	(2,120,091)
Equity - noncontrolling interest	0	0
Total liabilities and equity	$ (2,081,953)	$ (2,120,422)