Supplemental Guarantor Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 263,490		$ 30,115	$ 26,534
Restricted cash	96,740		87,354
Accounts and notes receivable, net	76,287		95,795
Other current assets	79,319
Total current assets	515,836		308,521
Property and equipment, net	423,578		461,277
Intangible assets, net	88,036		113,925
Goodwill	739,179		752,592
Operating lease assets	62,418		76,548
Investments in and advances to subsidiaries	0
Intercompany receivable	0
Deferred tax assets, net	17,420		13,159
Prepaid expenses, deferred costs, and other noncurrent assets	20,411		37,936
Total assets	1,866,878		1,763,958
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	183,314
Accounts payable and accrued liabilities	367,083
Total current liabilities	550,397		434,384
Long-term debt	773,857		739,475
Intercompany payable	0
Asset retirement obligations	54,607		55,494
Operating lease liabilities	58,782		69,531
Deferred tax liabilities, net	48,636		46,878
Other long-term liabilities	46,264		37,870
Total liabilities	1,532,543		1,383,632
Shareholders' equity	334,335	$ 308,089	380,326	$ 348,221	$ 361,873	$ 376,772
Total liabilities and shareholders’ equity	1,866,878		1,763,958
Eliminations
ASSETS
Cash and cash equivalents	0
Restricted cash	0
Accounts and notes receivable, net	0
Other current assets	0
Total current assets	0		0
Property and equipment, net	0
Intangible assets, net	0
Goodwill	0
Operating lease assets	0
Investments in and advances to subsidiaries	(919,748)
Intercompany receivable	(1,076,292)
Deferred tax assets, net	0
Prepaid expenses, deferred costs, and other noncurrent assets	0
Total assets	(1,996,040)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	0
Accounts payable and accrued liabilities	(20,909)
Total current liabilities	(20,909)		0
Long-term debt	0
Intercompany payable	(1,076,286)
Asset retirement obligations	0
Operating lease liabilities	0
Deferred tax liabilities, net	0
Other long-term liabilities	0
Total liabilities	(1,097,195)
Shareholders' equity	(898,845)
Total liabilities and shareholders’ equity	(1,996,040)
Parent | Reportable Legal Entities
ASSETS
Cash and cash equivalents	98
Restricted cash	0
Accounts and notes receivable, net	0
Other current assets	0
Total current assets	98		46
Property and equipment, net	0
Intangible assets, net	0
Goodwill	0
Operating lease assets	0
Investments in and advances to subsidiaries	390,948
Intercompany receivable	36,422
Deferred tax assets, net	698
Prepaid expenses, deferred costs, and other noncurrent assets	0
Total assets	428,166
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	0
Accounts payable and accrued liabilities	390
Total current liabilities	390		814
Long-term debt	0
Intercompany payable	93,441
Asset retirement obligations	0
Operating lease liabilities	0
Deferred tax liabilities, net	0
Other long-term liabilities	0
Total liabilities	93,831
Shareholders' equity	334,335
Total liabilities and shareholders’ equity	428,166
Issuer | Reportable Legal Entities
ASSETS
Cash and cash equivalents	186,507
Restricted cash	68,909
Accounts and notes receivable, net	41,057
Other current assets	40,105
Total current assets	336,578		146,768
Property and equipment, net	254,809
Intangible assets, net	26,661
Goodwill	445,046
Operating lease assets	34,239
Investments in and advances to subsidiaries	295,349
Intercompany receivable	510,388
Deferred tax assets, net	0
Prepaid expenses, deferred costs, and other noncurrent assets	12,047
Total assets	1,915,117
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	147,977
Accounts payable and accrued liabilities	240,871
Total current liabilities	388,848		242,735
Long-term debt	773,857
Intercompany payable	310,126
Asset retirement obligations	22,524
Operating lease liabilities	40,617
Deferred tax liabilities, net	46,238
Other long-term liabilities	37,310
Total liabilities	1,619,520
Shareholders' equity	295,597
Total liabilities and shareholders’ equity	1,915,117
Guarantors | Reportable Legal Entities
ASSETS
Cash and cash equivalents	61,756
Restricted cash	2,551
Accounts and notes receivable, net	17,921
Other current assets	2,198
Total current assets	84,426		41,788
Property and equipment, net	50,773
Intangible assets, net	41,048
Goodwill	141,262
Operating lease assets	2,120
Investments in and advances to subsidiaries	188,237
Intercompany receivable	254,500
Deferred tax assets, net	(1,013)
Prepaid expenses, deferred costs, and other noncurrent assets	1,438
Total assets	762,791
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	5,869
Accounts payable and accrued liabilities	62,267
Total current liabilities	68,136		66,766
Long-term debt	0
Intercompany payable	303,654
Asset retirement obligations	1,961
Operating lease liabilities	1,449
Deferred tax liabilities, net	1,660
Other long-term liabilities	2,147
Total liabilities	379,007
Shareholders' equity	383,784
Total liabilities and shareholders’ equity	762,791
Non-Guarantors | Reportable Legal Entities
ASSETS
Cash and cash equivalents	15,129
Restricted cash	25,280
Accounts and notes receivable, net	17,309
Other current assets	37,016
Total current assets	94,734		119,919
Property and equipment, net	117,996
Intangible assets, net	20,327
Goodwill	152,871
Operating lease assets	26,059
Investments in and advances to subsidiaries	45,214
Intercompany receivable	274,982
Deferred tax assets, net	17,735
Prepaid expenses, deferred costs, and other noncurrent assets	6,926
Total assets	756,844
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term liabilities	29,468
Accounts payable and accrued liabilities	84,464
Total current liabilities	113,932		$ 124,069
Long-term debt	0
Intercompany payable	369,065
Asset retirement obligations	30,122
Operating lease liabilities	16,716
Deferred tax liabilities, net	738
Other long-term liabilities	6,807
Total liabilities	537,380
Shareholders' equity	219,464
Total liabilities and shareholders’ equity	$ 756,844