Supplemental Guarantor Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 174,242	$ 30,115	$ 39,940
Accounts and notes receivable, net	89,867	95,795
Restricted cash	137,353	87,354	155,470
Other current assets	60,551
Total current assets	462,013	308,521
Property and equipment, net	429,842	461,277
Operating lease assets	60,368	76,548
Intangible assets, net	84,629	113,925
Goodwill	759,102	752,592	749,144
Investments in and advances to subsidiaries	0
Intercompany receivable	0
Deferred tax assets, net	17,382	13,159
Prepaid expenses, deferred costs, and other noncurrent assets	18,109	37,936
Total assets	1,831,445	1,763,958	1,787,344
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	69,799
Accounts payable and accrued liabilities	406,186
Total current liabilities	475,985	434,384
Long-term debt	773,177	739,475
Intercompany payable	0
Asset retirement obligations	56,973	55,494
Deferred tax liabilities, net	51,484	46,878
Noncurrent operating lease liabilities	56,683	69,531
Other long-term liabilities	37,727	37,870
Total liabilities	1,452,029	1,383,632
Shareholders' equity	379,416	380,326	$ 376,772	$ 390,393
Total liabilities and shareholders’ equity	1,831,445	$ 1,763,958
Eliminations
ASSETS
Cash and cash equivalents	0
Accounts and notes receivable, net	0
Restricted cash	0
Other current assets	0
Total current assets	0
Property and equipment, net	0
Operating lease assets	0
Intangible assets, net	0
Goodwill	0
Investments in and advances to subsidiaries	(972,835)
Intercompany receivable	(1,386,823)
Deferred tax assets, net	0
Prepaid expenses, deferred costs, and other noncurrent assets	0
Total assets	(2,359,658)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	0
Accounts payable and accrued liabilities	(17,705)
Total current liabilities	(17,705)
Long-term debt	0
Intercompany payable	(1,386,816)
Asset retirement obligations	0
Deferred tax liabilities, net	0
Noncurrent operating lease liabilities	0
Other long-term liabilities	0
Total liabilities	(1,404,521)
Shareholders' equity	(955,137)
Total liabilities and shareholders’ equity	(2,359,658)
Parent | Reportable Legal Entities
ASSETS
Cash and cash equivalents	87
Accounts and notes receivable, net	0
Restricted cash	0
Other current assets	0
Total current assets	87
Property and equipment, net	0
Operating lease assets	0
Intangible assets, net	0
Goodwill	0
Investments in and advances to subsidiaries	436,598
Intercompany receivable	7,412
Deferred tax assets, net	2
Prepaid expenses, deferred costs, and other noncurrent assets	0
Total assets	444,099
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	0
Accounts payable and accrued liabilities	4,295
Total current liabilities	4,295
Long-term debt	0
Intercompany payable	60,388
Asset retirement obligations	0
Deferred tax liabilities, net	0
Noncurrent operating lease liabilities	0
Other long-term liabilities	0
Total liabilities	64,683
Shareholders' equity	379,416
Total liabilities and shareholders’ equity	444,099
Issuers | Reportable Legal Entities
ASSETS
Cash and cash equivalents	116,386
Accounts and notes receivable, net	47,488
Restricted cash	107,658
Other current assets	27,957
Total current assets	299,489
Property and equipment, net	250,386
Operating lease assets	32,847
Intangible assets, net	23,411
Goodwill	445,046
Investments in and advances to subsidiaries	308,177
Intercompany receivable	461,473
Deferred tax assets, net	0
Prepaid expenses, deferred costs, and other noncurrent assets	10,448
Total assets	1,831,277
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	31,782
Accounts payable and accrued liabilities	278,695
Total current liabilities	310,477
Long-term debt	773,177
Intercompany payable	297,122
Asset retirement obligations	23,304
Deferred tax liabilities, net	49,637
Noncurrent operating lease liabilities	38,843
Other long-term liabilities	29,383
Total liabilities	1,521,943
Shareholders' equity	309,334
Total liabilities and shareholders’ equity	1,831,277
Guarantors | Reportable Legal Entities
ASSETS
Cash and cash equivalents	40,024
Accounts and notes receivable, net	25,558
Restricted cash	4,306
Other current assets	2,503
Total current assets	72,391
Property and equipment, net	53,980
Operating lease assets	2,924
Intangible assets, net	40,089
Goodwill	151,783
Investments in and advances to subsidiaries	175,330
Intercompany receivable	635,270
Deferred tax assets, net	(848)
Prepaid expenses, deferred costs, and other noncurrent assets	1,724
Total assets	1,132,643
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	6,760
Accounts payable and accrued liabilities	61,566
Total current liabilities	68,326
Long-term debt	0
Intercompany payable	638,130
Asset retirement obligations	1,948
Deferred tax liabilities, net	1,516
Noncurrent operating lease liabilities	1,894
Other long-term liabilities	1,932
Total liabilities	713,746
Shareholders' equity	418,897
Total liabilities and shareholders’ equity	1,132,643
Non-Guarantors | Reportable Legal Entities
ASSETS
Cash and cash equivalents	17,745
Accounts and notes receivable, net	16,821
Restricted cash	25,389
Other current assets	30,091
Total current assets	90,046
Property and equipment, net	125,476
Operating lease assets	24,597
Intangible assets, net	21,129
Goodwill	162,273
Investments in and advances to subsidiaries	52,730
Intercompany receivable	282,668
Deferred tax assets, net	18,228
Prepaid expenses, deferred costs, and other noncurrent assets	5,937
Total assets	783,084
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	31,257
Accounts payable and accrued liabilities	79,335
Total current liabilities	110,592
Long-term debt	0
Intercompany payable	391,176
Asset retirement obligations	31,721
Deferred tax liabilities, net	331
Noncurrent operating lease liabilities	15,946
Other long-term liabilities	6,412
Total liabilities	556,178
Shareholders' equity	226,906
Total liabilities and shareholders’ equity	$ 783,084