Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ (24,328)	$ (17,150)	$ 13,262
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	209,254	158,421	98,804
Loss on disposal or impairment, net	(3,563)	13,333	16,048
Equity earnings from investments	(57,672)	(67,331)	(73,757)
Loss on issuance of common units by equity method investee	0	0	41
Loss on sale or impairment of non-operated equity method investment	0	0	30,644
Distributions from equity investments	57,625	66,748	76,442
Amortization and write down of debt issuance costs	7,651	6,221	7,561
Loss on early extinguishment of debt	0	19,930	0
Deferred tax expense (benefit)	8,311	(9,829)	8,447
Non-cash compensation expense	11,522	10,253	10,216
Provision for uncollectible accounts receivable, net of recoveries	390	165	(527)
Gain on pension curtailment	0	(3,008)	0
Inventory valuation adjustment	5,200	455	0
Foreign currency transaction loss (gain)	9,501	(4,709)	4,759
Changes in operating assets and liabilities (Note 22)	45,813	(33,023)	(21,966)
Net cash provided by operating activities	269,704	140,476	169,974
Cash flows from investing activities:
Capital expenditures	(390,734)	(462,713)	(312,456)
Proceeds from sale of equity method investment and other long-lived assets	1,958	314,821	151
Investments in non-consolidated subsidiaries	(7,781)	(26,444)	(4,188)
Payments to acquire business, net of cash acquired	0	294,239	0
Proceeds from sale of common units of equity method investee	0	0	60,483
Proceeds from Divestiture of Businesses, Net of Cash Divested	147,787	0	0
Distributions from equity method investments in excess of equity in earnings	19,100	28,774	27,726
Net cash provided by (used in) investing activities	(229,670)	(439,801)	(228,284)
Cash flows from financing activities:
Debt issuance costs	(4,720)	(11,116)	(7,728)
Borrowings on credit facilities and issuance of senior unsecured notes	1,258,500	1,525,377	382,500
Principal payments on debt and other obligations	(1,839,894)	(1,052,428)	(396,890)
Debt extinguishment costs	0	(16,293)	0
Proceeds from Noncontrolling Interests	350,000	0	0
Distributions to noncontrolling interests	(2,932)	0	(32,133)
Proceeds from Issuance of Preferred Stock and Preference Stock	342,299	0	0
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(705)	(1,473)	(965)
Dividends paid	(148,482)	(129,925)	(92,910)
Proceeds from issuance of common stock under employee stock purchase plan	930	1,114	1,010
Proceeds from issuance of common shares, net of offering costs	0	0	223,025
Net cash provided by (used in) financing activities	(45,004)	315,256	75,909
Effect of exchange rate changes on cash and cash equivalents	(2,074)	3,552	(1,479)
Change in cash and cash equivalents	(7,044)	19,483	16,120
Cash and cash equivalents at beginning of period	93,699	74,216	58,096
Cash and cash equivalents at end of period	$ 86,655	$ 93,699	$ 74,216