Condensed Consolidating Guarantor Financial Statements - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Direct Financing Lease, Revenue	$ 3,937	$ 2,646	$ 12,517	$ 2,646
Total Revenues	633,996	545,922	1,891,399	1,475,111
Cost of Goods and Services Sold	468,871	398,252	1,377,092	1,087,357
Expenses:
Operating	64,835	62,666	224,871	188,095
General and administrative	21,904	38,389	71,267	86,920
Depreciation and amortization	53,598	50,135	155,889	100,336
Loss (gain) on disposal or impairment, net	(383)	41,625	(2,125)	43,801
Total expenses	608,825	591,067	1,826,994	1,506,509
Earnings from equity method investments	14,528	17,367	41,493	52,211
Operating income	39,699	(27,778)	105,898	20,813
Other expenses (income), net:
Interest Expense	35,318	32,711	113,683	60,055
Loss on early extinguishment of debt	0	0	0	19,930
Foreign currency transaction loss (gain)	(983)	(747)	4,625	(1,758)
Other expense (income), net	(400)	(3,390)	(1,883)	(4,116)
Total other expenses, net	33,935	28,574	116,425	74,111
Income (loss) from continuing operations before income taxes	5,764	(56,352)	(10,527)	(53,298)
Income tax expense (benefit)	(2,697)	(37,249)	16,773	(33,529)
Net loss	8,461	(19,103)	(27,300)	(19,769)
Other comprehensive income (loss), net of income taxes	(3,352)	(9,230)	(27,703)	(24,215)
Comprehensive income (loss)	11,813	(9,873)	403	4,446
Consolidation, Eliminations [Member]
Revenues:
Direct Financing Lease, Revenue	0	0	0	0
Total Revenues	0	0	0	0
Cost of Goods and Services Sold	0	0	0	0
Expenses:
Operating	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Loss (gain) on disposal or impairment, net	0	0	0	0
Total expenses	0	0	0	0
Earnings from equity method investments	(35,993)	24,393	(197,590)	(22,689)
Operating income	(35,993)	24,393	(197,590)	(22,689)
Other expenses (income), net:
Interest Expense	0	(217)	(240)	(617)
Loss on early extinguishment of debt		0		0
Foreign currency transaction loss (gain)	0	0	0	0
Other expense (income), net	0	217	240	617
Total other expenses, net	0	0	0	0
Income (loss) from continuing operations before income taxes	(35,993)	24,393	(197,590)	(22,689)
Income tax expense (benefit)	0	0	0	0
Net loss	(35,993)	24,393	(197,590)	(22,689)
Other comprehensive income (loss), net of income taxes	0	0	0	0
Comprehensive income (loss)	(35,993)	24,393	(197,590)	(22,689)
Reportable Legal Entities [Member] | Parent Company [Member]
Revenues:
Direct Financing Lease, Revenue	0	0	0	0
Total Revenues	0	0	0	0
Cost of Goods and Services Sold	0	0	0	0
Expenses:
Operating	0	0	0	0
General and administrative	6,174	18,970	19,149	35,513
Depreciation and amortization	719	610	2,213	1,613
Loss (gain) on disposal or impairment, net	1,198	0	133,808	0
Total expenses	8,091	19,580	155,170	37,126
Earnings from equity method investments	28,555	(26,856)	188,136	17,435
Operating income	20,464	(46,436)	32,966	(19,691)
Other expenses (income), net:
Interest Expense	19,341	12,418	50,582	23,009
Loss on early extinguishment of debt		0		19,930
Foreign currency transaction loss (gain)	(961)	0	5,505	0
Other expense (income), net	(40)	(225)	(896)	(669)
Total other expenses, net	18,340	12,193	55,191	42,270
Income (loss) from continuing operations before income taxes	2,124	(58,629)	(22,225)	(61,961)
Income tax expense (benefit)	(6,337)	(39,526)	5,075	(42,192)
Net loss	8,461	(19,103)	(27,300)	(19,769)
Other comprehensive income (loss), net of income taxes	6,111	5,346	16,202	14,296
Comprehensive income (loss)	2,350	(24,449)	(43,502)	(34,065)
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Revenues:
Direct Financing Lease, Revenue	0	0	0	0
Total Revenues	527,368	416,040	1,508,719	1,165,798
Cost of Goods and Services Sold	468,841	361,675	1,350,821	993,838
Expenses:
Operating	27,806	28,645	83,979	84,408
General and administrative	5,640	5,556	17,500	19,805
Depreciation and amortization	19,477	17,580	57,830	52,077
Loss (gain) on disposal or impairment, net	(1,581)	40,161	(152,634)	42,125
Total expenses	520,183	453,617	1,357,496	1,192,253
Earnings from equity method investments	21,966	18,094	50,947	52,063
Operating income	29,151	(19,483)	202,170	25,608
Other expenses (income), net:
Interest Expense	10,400	15,684	45,931	34,355
Loss on early extinguishment of debt		0		0
Foreign currency transaction loss (gain)	0	0	147	0
Other expense (income), net	(9)	(8)	(17)	(13)
Total other expenses, net	10,391	15,676	46,061	34,342
Income (loss) from continuing operations before income taxes	18,760	(35,159)	156,109	(8,734)
Income tax expense (benefit)	0	0	0	0
Net loss	18,760	(35,159)	156,109	(8,734)
Other comprehensive income (loss), net of income taxes	(87)	193	(242)	523
Comprehensive income (loss)	18,847	(35,352)	156,351	(9,257)
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Revenues:
Direct Financing Lease, Revenue	3,937	2,646	12,517	2,646
Total Revenues	106,628	129,882	382,680	309,313
Cost of Goods and Services Sold	30	36,577	26,271	93,519
Expenses:
Operating	37,029	34,021	140,892	103,687
General and administrative	10,090	13,863	34,618	31,602
Depreciation and amortization	33,402	31,945	95,846	46,646
Loss (gain) on disposal or impairment, net	0	1,464	16,701	1,676
Total expenses	80,551	117,870	314,328	277,130
Earnings from equity method investments	0	1,736	0	5,402
Operating income	26,077	13,748	68,352	37,585
Other expenses (income), net:
Interest Expense	5,577	4,826	17,410	3,308
Loss on early extinguishment of debt		0		0
Foreign currency transaction loss (gain)	(22)	(747)	(1,027)	(1,758)
Other expense (income), net	(351)	(3,374)	(1,210)	(4,051)
Total other expenses, net	5,204	705	15,173	(2,501)
Income (loss) from continuing operations before income taxes	20,873	13,043	53,179	40,086
Income tax expense (benefit)	3,640	2,277	11,698	8,663
Net loss	17,233	10,766	41,481	31,423
Other comprehensive income (loss), net of income taxes	(9,376)	(14,769)	(43,663)	(39,034)
Comprehensive income (loss)	26,609	25,535	85,144	70,457
Product [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	487,693	423,531	1,421,751	1,164,898
Product [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Product [Member] | Reportable Legal Entities [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Product [Member] | Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	487,676	381,228	1,390,415	1,055,387
Product [Member] | Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17	42,303	31,336	109,511
Service [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	127,840	105,287	408,699	261,967
Service [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Service [Member] | Reportable Legal Entities [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Service [Member] | Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	39,692	34,812	118,304	110,411
Service [Member] | Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	88,148	70,475	290,395	151,556
Other revenue [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	14,526	14,458	48,432	45,600
Other revenue [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Other revenue [Member] | Reportable Legal Entities [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Other revenue [Member] | Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Other revenue [Member] | Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,526	$ 14,458	$ 48,432	$ 45,600