Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 18,913	$ 13,287	$ 6,941	$ 3,045
Accounts receivable	64,776	68,447
Prepaid and other current assets	7,905	7,629
Total current assets	91,594	89,363
Properties and equipment, net	1,458,934	1,467,099
Operating lease right-of-use assets	3,377	3,255
Net Investment in Lease	168,153	134,886
Investment in subsidiaries	0	0
Intangible assets, net	94,318	101,322
Goodwill	270,336	270,336
Equity method investments	123,299	120,071
Other assets	11,772	12,900
Assets	2,221,783	2,199,232
Current liabilities:
Accounts payable	21,925	34,555
Due to Affiliate	7,300	16,700
Accrued interest	10,683	13,206
Deferred revenue	11,002	10,390
Accrued property taxes	5,526	3,799
Current maturities of operating leases	1,213	1,126
Current maturities of finance leases	3,293	3,224
Other current liabilities	2,975	2,305
Total current liabilities	56,617	68,605
Long-term debt	1,486,648	1,462,031
Noncurrent operating lease liabilities	2,530	2,482
Noncurrent finance lease liabilities	70,039	70,475
Other long-term liabilities	13,689	12,808
Deferred revenue	42,692	45,681
Class B unit	51,062	49,392
Equity - partners	380,723	381,103
Equity - noncontrolling interest	117,783	106,655
Total liabilities and equity	2,221,783	2,199,232
Parent
Current assets:
Cash and cash equivalents	3,927	4,790	2	2
Accounts receivable	0	0
Prepaid and other current assets	337	282
Total current assets	4,264	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	1,868,595	1,844,812
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	0	0
Other assets	5,497	6,722
Assets	1,878,356	1,856,606
Current liabilities:
Accounts payable	0	0
Accrued interest	10,683	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	42	6
Total current liabilities	10,725	13,212
Long-term debt	1,486,648	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	380,723	381,103
Equity - noncontrolling interest	0	0
Total liabilities and equity	1,878,356	1,856,606
Guarantor Restricted Subsidiaries
Current assets:
Cash and cash equivalents	(766)	(709)	1,703	0
Accounts receivable	58,197	60,229
Prepaid and other current assets	6,992	6,710
Total current assets	64,423	66,230
Properties and equipment, net	1,110,139	1,133,534
Operating lease right-of-use assets	3,185	3,243
Net Investment in Lease	168,153	134,886
Investment in subsidiaries	282,348	275,279
Intangible assets, net	94,318	101,322
Goodwill	270,336	270,336
Equity method investments	83,484	82,987
Other assets	6,275	6,178
Assets	2,082,661	2,073,995
Current liabilities:
Accounts payable	14,343	29,895
Accrued interest	0	0
Deferred revenue	10,502	9,740
Accrued property taxes	2,732	2,737
Current maturities of operating leases	1,145	1,114
Current maturities of finance leases	3,293	3,224
Other current liabilities	2,819	2,293
Total current liabilities	34,834	49,003
Long-term debt	0	0
Noncurrent operating lease liabilities	2,530	2,482
Noncurrent finance lease liabilities	70,039	70,475
Other long-term liabilities	12,909	12,150
Deferred revenue	42,692	45,681
Class B unit	51,062	49,392
Equity - partners	1,868,595	1,844,812
Equity - noncontrolling interest	0	0
Total liabilities and equity	2,082,661	2,073,995
Non-Guarantor Non-Restricted Subsidiaries
Current assets:
Cash and cash equivalents	15,752	9,206	5,236	3,043
Accounts receivable	7,840	8,549
Prepaid and other current assets	576	637
Total current assets	24,168	18,392
Properties and equipment, net	348,795	333,565
Operating lease right-of-use assets	192	12
Net Investment in Lease		0
Investment in subsidiaries	0	0
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	39,815	37,084
Other assets	0	0
Assets	412,970	389,053
Current liabilities:
Accounts payable	8,843	4,991
Accrued interest	0	0
Deferred revenue	500	650
Accrued property taxes	2,794	1,062
Current maturities of operating leases	68	12
Current maturities of finance leases	0	0
Other current liabilities	114	6
Total current liabilities	12,319	6,721
Long-term debt	0	0
Noncurrent operating lease liabilities	0	0
Noncurrent finance lease liabilities	0	0
Other long-term liabilities	520	398
Deferred revenue	0	0
Class B unit	0	0
Equity - partners	282,348	275,279
Equity - noncontrolling interest	117,783	106,655
Total liabilities and equity	412,970	389,053
Eliminations
Current assets:
Cash and cash equivalents	0	0	$ 0	$ 0
Accounts receivable	(1,261)	(331)
Prepaid and other current assets		0
Total current assets	(1,261)	(331)
Properties and equipment, net	0	0
Operating lease right-of-use assets	0	0
Net Investment in Lease	0	0
Investment in subsidiaries	(2,150,943)	(2,120,091)
Intangible assets, net	0	0
Goodwill	0	0
Equity method investments	0	0
Other assets	0	0
Assets	(2,152,204)	(2,120,422)
Current liabilities:
Accounts payable	(1,261)	(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	(1,261)	(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	(2,150,943)	(2,120,091)
Equity - noncontrolling interest	0	0
Total liabilities and equity	$ (2,152,204)	$ (2,120,422)