Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 17,515	$ (3,872)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	49,801	35,747
MSA Fee Waivers	13,963	18,749
Amortization of debt issuance costs, debt premium and original issue discounts	1,471	899
Unit-based compensation	6,602	3,835
Fair value changes in derivatives	(3,022)	(2,275)
Unrealized (losses) gains on foreign currency transactions, net	73	58
Change in operating assets and liabilities:
Accounts and insurance receivables	(14,361)	9,492
Related-party receivables	(6,621)	1,392
Prepaid expenses and other current and long-term assets	12,238	(212)
Inventories	(15,952)	(10,679)
Derivatives	(250)	1,514
Accounts payable, accrued liabilities and other current liabilities	16,771	(2,247)
Related-party payables	0	(12,025)
Accrued interest	4,820	6,420
Deferred revenue	(4,139)	0
Operating lease liabilities	(3,832)	(3,715)
Other long-term liabilities	(17,570)	(164)
Net cash provided by operating activities	59,190	43,479
Cash flows from investing activities:
Purchases of property, plant and equipment	(76,887)	(81,484)
Payments in relation to the Greenwood Drop-Down, net of cash acquired	(129,631)	0
Payment in relation to the Georgia Biomass Acquisition, net of cash acquired	(163,299)	0
Other	(3,769)	1,502
Net cash used in investing activities	(373,586)	(154,682)
Cash flows from financing activities:
Proceeds from senior secured revolving credit facility, net	105,000	112,000
Proceeds from debt issuance	155,625	0
Principal payments on other long-term debt and finance lease obligations	(3,708)	(2,026)
Cash paid related to debt issuance and deferred offering costs	(3,838)	0
Proceeds from common unit issuances, net	191,113	96,822
Distributions to unitholders, distribution equivalent rights and incentive distribution rights holder	(93,634)	(69,526)
Payment for withholding tax associated with Long-Term Incentive Plan vesting	(3,869)	(1,870)
Net cash provided by financing activities	306,689	111,100
Net decrease in cash, cash equivalents and restricted cash	(7,707)	(103)
Cash, cash equivalents and restricted cash, beginning of period	9,053	2,460
Cash, cash equivalents and restricted cash, end of period	1,346	2,357
Non-cash investing and financing activities:
Property, plant and equipment acquired included in liabilities	18,270	4,391
Supplemental cash flow information:
Interest paid, net of capitalized interest	22,666	19,977
Hamlet Transaction
Payment in relation to the Hamlet Drop-Down	0	(74,700)
Payments for deferred consideration	(40,000)	0
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	0	50,000
Wilmington, LLC Drop-Down
Payments for deferred consideration	0	(24,300)
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 0	$ 49,700