Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 124,504	$ 112,690
Accounts receivable—trade, net of allowances for credit losses of $2,930 and $1,053, respectively	58,569	204,413
Accounts and notes receivable—related party	1,314	9,629
Unbilled revenue	8,636	38,868
Inventories	81,167	88,547
Prepaid and other current assets	25,500	34,827
Total current assets	299,690	488,974
Property and equipment, net	613,136	651,703
Other assets	30,704	34,339
Finance lease right-of-use assets	32,921	55,337
Operating lease right-of-use assets	74,669	53,076
Total assets	1,051,120	1,283,429
Current liabilities:
Accounts payable	27,381	117,613
Accrued liabilities:
Accrued vendor invoices	10,854	42,753
Operational accruals	9,496	26,753
Accrued salaries and benefits	8,021	28,805
Accrued interest and other (including payables to related parties of $2,878 and $1,329, respectively)	8,487	10,643
Current portion of long-term debt, net of discount of $1,397 and $1,341, respectively	353	409
Current portion of finance lease liabilities	15,633	23,646
Current portion of operating lease liabilities	20,727	15,873
Total current liabilities	100,952	266,495
Long-term debt, net of discount of $1,745 and $2,485, respectively, less current portion	105,596	105,731
Deferred tax liability	14,887	19,659
Payable pursuant to tax receivable agreements, including payables to related parties of $20,579 and $23,797, respectively	45,678	48,481
Noncurrent portion of finance lease liabilities	12,898	24,884
Noncurrent portion of operating lease liabilities	51,152	36,687
Total liabilities	331,163	501,937
Commitments & contingencies (Note 13)
Stockholders’ equity:
Preferred Stock, $0.01 par value, 10,000 shares authorized and none issued and outstanding	0	0
Common Stock:
Additional paid in capital	435,885	410,596
Retained earnings	94,817	143,105
Total stockholders’ equity	531,831	554,827
Non-controlling interest	188,126	226,665
Total equity	719,957	781,492
Total liabilities and equity	1,051,120	1,283,429
Class A, $0.01 par value, 400,000,000 shares authorized and 84,853,084 issued and outstanding as of June 30, 2020 and 81,885,384 issued and outstanding as of December 31, 2019
Common Stock:
Common stock, par value $0.01	848	819
Class B, $0.01 par value, 400,000,000 shares authorized and 28,080,525 issued and outstanding as of June 30, 2020 and 30,638,960 issued and outstanding as of December 31, 2019
Common Stock:
Common stock, par value $0.01	$ 281	$ 307