CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss)	$ 48,446	$ 26,408
Reconciliation of net income (loss) to net cash provided by operating activities
Depreciation and amortization	8,881	6,621
Debt discount and deferred loan cost amortization	42	219
Stock-based compensation	1,676	834
Inventory obsolescence	224	451
Loss on disposal of assets	863	29
Deferred income taxes	(2,796)	963
Loss on debt extinguishment		4,305
Changes in operating assets and liabilities:
Accounts receivable	(15,597)	(419)
Inventories	(8,875)	(5,594)
Prepaid expenses and other assets	2,156	(56)
Accounts payable	192	792
Accrued expenses and other liabilities	737	4,012
Operating lease liabilities	(1,710)
Net cash provided by operating activities	34,239	38,565
Cash flows from investing activities
Capital expenditures and other	(14,655)	(16,127)
Proceeds from sale of assets	808	440
Net cash used in investing activities	(13,847)	(15,687)
Cash flows from financing activities
Principal payments on long-term debt		(248,529)
Payments on capital leases	1,846
Payments on capital leases		(1,266)
Net proceeds from equity offerings		469,621
Distributions to members	(235)	(26,041)
Redemption of CW Units		(216,425)
Repurchase of shares	(1,474)
Net cash used in financing activities	(3,555)	(22,640)
Effect of exchange rate changes on cash and cash equivalents	438	48
Net increase (decrease) in cash and cash equivalents	17,275	286
Cash and cash equivalents
Beginning of period	70,841	7,574
End of period	$ 88,116	$ 7,860