Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 56,531	$ 112,690
Accounts receivable—trade, net of allowances for credit losses of $3,576 and $1,053, respectively	281,855	204,413
Accounts and notes receivable—related party	1,390	9,629
Unbilled revenue	52,380	38,868
Inventories	87,616	88,547
Prepaid and other current assets	38,201	34,827
Total current assets	517,973	488,974
Property and equipment, net	642,871	651,703
Other assets	32,042	34,339
Finance lease right-of-use assets	52,683	55,337
Operating lease right-of-use assets	52,983	53,076
Total assets	1,298,552	1,283,429
Current liabilities:
Accounts payable	108,136	117,613
Accrued liabilities:
Accrued vendor invoices	67,570	42,753
Operational accruals	20,437	26,753
Accrued salaries and benefits	32,102	28,805
Accrued interest and other (including payables to related parties of $2,998 and $1,329, respectively)	12,638	10,643
Current portion of long-term debt, net of discount of $1,336 and $1,341, respectively	414	409
Current portion of finance lease liabilities	25,036	23,646
Current portion of operating lease liabilities	16,935	15,873
Total current liabilities	283,268	266,495
Long-term debt, net of discount of $2,153 and $2,485, respectively, less current portion	105,625	105,731
Deferred tax liability	28,913	19,659
Payable pursuant to tax receivable agreements, including payables to related parties of $20,601 and $23,797, respectively	42,586	48,481
Noncurrent portion of finance lease liabilities	21,025	24,884
Noncurrent portion of operating lease liabilities	35,682	36,687
Total liabilities	517,099	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	413,664	410,596
Retained earnings	140,581	143,105
Total stockholders’ equity	555,371	554,827
Non-controlling interest	226,082	226,665
Total equity	781,453	781,492
Total liabilities and equity	1,298,552	1,283,429
Class A, $0.01 par value, 400,000,000 shares authorized and 81,920,347 issued and outstanding as of March 31, 2020 and 81,885,384 issued and outstanding as of December 31, 2019
Common Stock:
Common stock, par value $0.01	819	819
Class B, $0.01 par value, 400,000,000 shares authorized and 30,638,960 issued and outstanding as of March 31, 2020 and December 31, 2019
Common Stock:
Common stock, par value $0.01	$ 307	$ 307