Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (33,035)	$ (10,277)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	50,536	24,599
Loss (gain) on disposal or impairment of long-lived assets, net	(3,566)	2,410
Earnings from equity method investments	(12,614)	(17,091)
Distributions from equity method investments	12,605	17,301
Amortization of debt issuance costs and discount	1,796	1,364
Loss on early extinguishment of debt	0	19,922
Deferred tax expense (benefit)	10,044	(634)
Non-cash equity compensation	2,196	2,757
Provision for uncollectible accounts receivable, net of recoveries	(173)	151
Foreign currency transaction loss	3,294	0
Inventory valuation adjustment	0	455
Changes in operating assets and liabilities (Note 13)	52,497	(12,948)
Net cash provided by operating activities	83,580	28,009
Capital expenditures	(131,784)	(92,248)
Proceeds from sale of long-lived assets	16	15,500
Contributions to equity method investments	(309)	(2,490)
Proceeds from the sale of Mexican asphalt business, net	63,830	0
Distributions in excess of equity in earnings of affiliates	6,545	4,392
Net cash used in investing activities	(61,702)	(74,846)
Debt issuance costs	(459)	(4,632)
Borrowings on credit facilities and issuance of senior notes, net of discount	0	437,018
Principal payments on credit facilities and other obligations	(134,246)	(348,278)
Debt extinguishment costs	0	(16,293)
Proceeds from issuance preferred stock, net of offering costs	342,354	0
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(381)	(1,047)
Dividends paid	(37,230)	(29,770)
Proceeds from issuance of common stock under employee stock purchase plan	24	231
Net cash provided by financing activities	170,062	37,229
Effect of exchange rate changes on cash and cash equivalents	(141)	1,248
Change in cash and cash equivalents	191,799	(8,360)
Cash and cash equivalents at beginning of period	93,699	74,216
Cash and cash equivalents at end of period	$ 285,498	$ 65,856