Segment Information - Certain Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue from external customers	$ 340,175	$ 401,950	$ 1,017,346	$ 1,144,634
Cost of revenues	225,529	260,056	679,220	764,218
Selling, general, and administrative expenses	41,896	46,132	124,564	131,551
Redomicile-related expenses		22		782
Restructuring expenses	1,058		5,534	8,243	$ 10,400
Acquisition and divestiture-related expenses		2,889	2,633	15,338
Goodwill and intangible asset impairment		194,521		194,521
Loss (gain) on disposal and impairment of assets	466	22,307	15,583	26,170
Adjusted EBITDA	77,433	99,913	224,234	258,820
Depreciation and accretion expense adjustment	30,646	29,805	93,451	88,677
Adjusted EBITA	46,787	70,108	130,783	170,143
Capital expenditures	26,675	41,556	73,357	111,424
Segment Eliminations
Segment Reporting Information [Line Items]
Intersegment revenues	(2,880)	(2,686)	(8,498)	(7,860)
Cost of revenues	(1,699)	(1,785)	(5,173)	(4,964)
Selling, general, and administrative expenses			(14)
Adjusted EBITDA	(1,164)	(894)	(3,268)	(2,889)
Depreciation and accretion expense adjustment	(15)		(69)
Adjusted EBITA	(1,153)	(894)	(3,198)	(2,889)
North America
Segment Reporting Information [Line Items]
Revenue from external customers	206,465	257,258	618,538	745,801
Intersegment revenues	2,283	2,360	6,888	6,731
Cost of revenues	141,169	170,948	426,742	506,956
Selling, general, and administrative expenses	16,762	17,273	49,239	53,300
Restructuring expenses	942		3,072	3,668
Acquisition and divestiture-related expenses		95	(348)	2,243
Loss (gain) on disposal and impairment of assets	246	479	10,880	4,275
Adjusted EBITDA	50,825	71,397	149,445	192,273
Depreciation and accretion expense adjustment	17,405	16,413	51,257	50,967
Adjusted EBITA	33,412	54,984	98,186	141,300
Capital expenditures	14,149	20,658	24,672	60,161
Europe And Africa
Segment Reporting Information [Line Items]
Revenue from external customers	104,241	109,259	309,522	298,857
Intersegment revenues	597	326	1,610	1,129
Cost of revenues	64,603	65,189	191,049	188,889
Selling, general, and administrative expenses	9,079	9,799	27,682	29,516
Redomicile-related expenses		13		36
Restructuring expenses	116		1,292	831
Acquisition and divestiture-related expenses		(245)	1,516	1,748
Loss (gain) on disposal and impairment of assets	232	160	4,613	369
Adjusted EBITDA	31,157	34,596	92,403	81,581
Depreciation and accretion expense adjustment	11,788	11,476	38,286	32,093
Adjusted EBITA	19,369	23,120	54,117	49,489
Capital expenditures	10,931	19,604	29,475	45,814
Australia And New Zealand
Segment Reporting Information [Line Items]
Revenue from external customers	29,469	35,433	89,286	99,976
Cost of revenues	21,227	24,907	66,198	72,400
Selling, general, and administrative expenses	2,362	2,282	7,409	6,633
Acquisition and divestiture-related expenses	285	442	920	2,153
Goodwill and intangible asset impairment		194,521		194,521
Loss (gain) on disposal and impairment of assets	(12)	21,668	90	21,478
Adjusted EBITDA	5,880	8,237	15,678	20,924
Depreciation and accretion expense adjustment	1,265	1,916	3,774	5,617
Adjusted EBITA	4,615	6,321	11,905	15,312
Capital expenditures	1,595	1,294	5,017	5,449
Corporate Segment
Segment Reporting Information [Line Items]
Cost of revenues	229	797	404	937
Selling, general, and administrative expenses	13,693	16,778	40,248	42,102
Redomicile-related expenses		9		746
Restructuring expenses			1,170	3,744
Acquisition and divestiture-related expenses	(285)	2,597	545	9,194
Loss (gain) on disposal and impairment of assets				48
Adjusted EBITDA	(9,265)	(13,423)	(30,024)	(33,069)
Depreciation and accretion expense adjustment	203		203
Adjusted EBITA	$ (9,456)	$ (13,423)	(30,227)	$ (33,069)
Capital expenditures			$ 14,193