Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ 13,262	$ 42,812	$ 52,057
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Net unrealized (gain) loss related to derivative instruments	989	2,014	(1,734)
Depreciation and amortization	98,804	100,882	98,397
Loss on disposal or impairment, net	16,048	11,472	32,592
Equity earnings from investments	(73,757)	(81,386)	(64,199)
Loss (gain) on issuance of common units by equity method investee	41	(6,385)	(29,020)
Loss (gain) on sale or impairment of equity method investment	30,644	(14,517)	(34,211)
Distributions from equity investments	76,442	95,429	85,261
Amortization and write down of debt issuance costs	7,561	5,102	3,632
Deferred Income Taxes and Tax Credits	8,447	29,197	36,148
Non-cash compensation expense	10,216	10,617	8,386
Excess tax benefit from equity-based awards	0	0	(1,650)
(Gain) loss on fair value of warrants	0	0	13,423
Provision for uncollectible accounts receivable, net of recoveries	(527)	208	360
Inventory valuation adjustment	0	2,590	5,667
Foreign currency transaction loss (gain)	4,759	(1,067)	(86)
Changes in operating assets and liabilities (Note 22)	(22,955)	(15,206)	(23,365)
Net cash provided by operating activities	169,974	181,762	181,658
Cash flows from investing activities:
Capital expenditures	(312,456)	(479,530)	(270,506)
Proceeds from sale of property, plant and equipment	151	3,688	4,445
Investments in non-consolidated subsidiaries	(4,188)	(46,730)	(71,131)
Payments to acquire businesses	0	0	44,508
Proceeds from sale of common units of equity method investee	60,483	56,318	79,741
Distributions from equity method investments in excess of equity in earnings	27,726	24,113	11,734
Net cash provided by (used in) investing activities	(228,284)	(442,141)	(290,225)
Cash flows from financing activities:
Debt issuance costs	(7,728)	(6,289)	(8,686)
Proceeds from Issuance of Long-term Debt	382,500	867,208	1,254,244
Principal payments on debt and other obligations	(396,890)	(560,049)	(1,102,272)
Distributions to noncontrolling interests	(32,133)	(40,410)	(28,494)
Proceeds from warrant exercises	0	0	1,451
Payments Related to Tax Withholding for Share-based Compensation	(965)	(4,261)	(719)
Dividends paid	(92,910)	(69,514)	(44,206)
Proceeds from issuance of common stock under employee stock purchase plan	1,010	1,223	340
Excess tax benefit from equity-based awards	0	0	1,650
Proceeds from Issuance of Common Stock	223,025	0	0
Proceeds from Issuance of Common Limited Partners Units	0	89,119	0
Net cash provided by (used in) financing activities	75,909	277,027	73,308
Effect of exchange rate changes on cash and cash equivalents	(1,479)	850	(3,494)
Change in cash and cash equivalents	16,120	17,498	(38,753)
Cash and cash equivalents at beginning of period	58,096	40,598	79,351
Cash and cash equivalents at end of period	$ 74,216	$ 58,096	$ 40,598