Supplemental Guarantor Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 02, 2018	Dec. 31, 2017	Sep. 30, 2017
Assets
Cash and cash equivalents	$ 40,428		$ 51,370	$ 61,498
Accounts and notes receivable, net	87,150		105,245
Other current assets	195,684		158,717
Total current assets	323,262		315,332
Property and equipment, net	457,350		497,902
Intangible assets, net	164,480		209,862
Goodwill	759,191		774,939
Deferred tax asset, net	7,412		6,925
Prepaid expenses, deferred costs, and other noncurrent assets	72,386	$ 62,349	57,756
Total assets	1,784,081		1,862,716
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	19,690		31,370
Accounts payable and accrued liabilities	352,602		351,180
Total current liabilities	372,292		382,550
Long-term debt, noncurrent portion	835,790		917,721
Asset retirement obligations	55,705		59,920
Deferred tax liability, net	48,812	$ 38,709	37,130
Other long-term liabilities	59,744		75,002
Total liabilities	1,372,343		1,472,323
Shareholders' equity	411,738		390,393
Total liabilities and shareholders' equity	1,784,081		1,862,716
Eliminations
Assets
Property and equipment, net	(405)		(168)
Intangible assets, net	(917)		(723)
Goodwill	(525)
Investments in and advances to subsidiaries	(1,500,436)		(1,243,403)
Intercompany receivable	(748,745)		(779,656)
Total assets	(2,251,028)		(2,023,950)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	(12)		(12)
Total current liabilities	(12)		(12)
Intercompany payable	(752,028)		(783,144)
Total liabilities	(752,040)		(783,156)
Shareholders' equity	(1,498,988)		(1,240,794)
Total liabilities and shareholders' equity	(2,251,028)		(2,023,950)
Parent [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	89		89
Other current assets	24		400
Total current assets	113		489
Investments in and advances to subsidiaries	408,015		385,729
Intercompany receivable	16,328		10,231
Deferred tax asset, net	598		332
Total assets	425,054		396,781
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accounts payable and accrued liabilities	587		979
Total current liabilities	587		979
Intercompany payable	12,729		5,409
Total liabilities	13,316		6,388
Shareholders' equity	411,738		390,393
Total liabilities and shareholders' equity	425,054		396,781
Issuer | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	6		7
Other current assets	5,762		1,585
Total current assets	5,768		1,592
Investments in and advances to subsidiaries	754,791		465,347
Intercompany receivable	170,221		211,540
Prepaid expenses, deferred costs, and other noncurrent assets	22,963		12,172
Total assets	953,743		690,651
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	250		4,892
Accounts payable and accrued liabilities	3,084		10,070
Total current liabilities	3,334		14,962
Long-term debt, noncurrent portion	509,624		504,912
Intercompany payable	19,449		4,272
Other long-term liabilities	267		3,997
Total liabilities	532,674		528,143
Shareholders' equity	421,069		162,508
Total liabilities and shareholders' equity	953,743		690,651
Guarantors [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	20,598		15,807
Accounts and notes receivable, net	56,523		55,912
Deferred tax asset, net			(3,466)
Other current assets	91,515		73,847
Total current assets	168,636		142,100
Property and equipment, net	299,744		312,591
Intangible assets, net	128,673		159,248
Goodwill	570,421		572,275
Investments in and advances to subsidiaries	337,630		392,327
Intercompany receivable	86,571		71,477
Deferred tax asset, net	(1,987)		1,343
Prepaid expenses, deferred costs, and other noncurrent assets	27,601		28,763
Total assets	1,617,289		1,680,124
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	15,307		21,746
Accounts payable and accrued liabilities	221,556		205,199
Total current liabilities	236,863		226,945
Long-term debt, noncurrent portion	321,998		394,596
Intercompany payable	638,808		673,053
Asset retirement obligations	25,336		25,424
Deferred tax liability, net	46,284		34,926
Other long-term liabilities	20,168		25,402
Total liabilities	1,289,457		1,380,346
Shareholders' equity	327,832		299,778
Total liabilities and shareholders' equity	1,617,289		1,680,124
Non-Guarantors [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	19,735		35,467
Accounts and notes receivable, net	30,627		49,333
Deferred tax asset, net			3,466
Other current assets	98,383		82,885
Total current assets	148,745		171,151
Property and equipment, net	158,011		185,479
Intangible assets, net	36,724		51,337
Goodwill	189,295		202,664
Intercompany receivable	475,625		486,408
Deferred tax asset, net	8,801		5,250
Prepaid expenses, deferred costs, and other noncurrent assets	21,822		16,821
Total assets	1,039,023		1,119,110
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of other long-term liabilities	4,145		4,744
Accounts payable and accrued liabilities	127,375		134,932
Total current liabilities	131,520		139,676
Long-term debt, noncurrent portion	4,168		18,213
Intercompany payable	81,042		100,410
Asset retirement obligations	30,369		34,496
Deferred tax liability, net	2,528		2,204
Other long-term liabilities	39,309		45,603
Total liabilities	288,936		340,602
Shareholders' equity	750,087		778,508
Total liabilities and shareholders' equity	$ 1,039,023		$ 1,119,110