Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (63,418)	$ 74,432
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	89,762	78,755
Loss on disposal of assets	232	1,366
Interest expense on finance lease liability	0	1,350
Amortization of debt issuance costs	1,106	1,105
Inventory write-down	770	0
Non-cash lease expense	1,999	2,828
Stock based compensation expense	8,407	6,451
Deferred income taxes	(11,268)	6,895
Loss on tax receivable agreements	169	0
Provision for credit losses	4,678	0
Changes in operating assets and liabilities:
Accounts receivable and unbilled revenue	171,398	(113,559)
Accounts receivable and unbilled revenue—related party	8,314	(462)
Inventories	6,610	(26,785)
Other assets	21,410	18,151
Accounts payable and accrued liabilities	(142,643)	53,343
Accounts payable and accrued liabilities—related party	0	(1,000)
Payment of operating lease liability	(895)	(5,157)
Net cash provided by operating activities	96,631	97,713
Cash flows from investing activities:
Purchases of property and equipment and construction in-progress	(70,460)	(130,408)
Proceeds from sale of assets	463	344
Net cash used in investing activities	(69,997)	(130,064)
Cash flows from financing activities:
Repayments of borrowings on term loan	(875)	(438)
Payments on finance lease obligations	(4,965)	(6,794)
Class A Common Stock dividends	(4,262)	(6,885)
Per unit distributions to non-controlling interest unitholders	(1,532)	(4,357)
Other distributions and advance payments to non-controlling interest unitholders	(2,783)	(547)
Tax withholding on restricted stock unit vesting	(403)	(1,039)
Share repurchases	0	(18,398)
Net cash used in financing activities	(14,820)	(38,458)
Net increase (decrease) in cash and cash equivalents	11,814	(70,809)
Cash and cash equivalents—beginning of period	112,690	103,312
Cash and cash equivalents—end of period	124,504	32,503
Supplemental disclosure of cash flow information:
Cash paid for income taxes	0	1,042
Cash paid for interest	5,649	5,575
Non-cash investing and financing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 7,855	$ 10,353