Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (112,443)	$ 93,272
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	134,258	121,079
(Gain) loss on disposal of assets	(520)	1,242
Interest expense on finance lease liability	0	2,015
Amortization of debt issuance costs	1,668	1,656
Inventory write-down	770	649
Non-cash lease expense	2,681	3,061
Stock based compensation expense	12,894	9,993
Deferred income taxes	(21,324)	9,194
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	94,573	(4,171)
Accounts receivable and unbilled revenue—related party	9,254	(5,326)
Inventories	10,788	(27,611)
Other assets	16,270	14,479
Accounts payable and accrued liabilities	(82,815)	31,740
Accounts payable and accrued liabilities—related party	0	(1,000)
Payment of operating lease liability	(895)	(5,197)
Net cash provided by operating activities	70,006	245,075
Cash flows from investing activities:
Purchases of property and equipment and construction in-progress	(82,772)	(158,235)
Proceeds from sale of assets	1,501	541
Net cash used in investing activities	(81,271)	(157,694)
Cash flows from financing activities:
Repayments of borrowings on term loan	(1,313)	(1,313)
Payments on finance lease obligations	(6,862)	(10,504)
Class A Common Stock dividends	(4,262)	(10,626)
Per unit distributions to non-controlling interest unitholders	(1,532)	(6,215)
Other distributions and advance payments to non-controlling interest unitholders	(2,234)	(1,104)
Tax withholding on restricted stock unit vesting	(403)	(1,039)
Share repurchases	0	(18,398)
Payment of equity offering costs	0	(1,499)
Net cash used in financing activities	(16,606)	(50,698)
Net increase (decrease) in cash and cash equivalents	(27,871)	36,683
Cash and cash equivalents—beginning of period	112,690	103,312
Cash and cash equivalents—end of period	84,819	139,995
Supplemental disclosure of cash flow information:
Cash paid for income taxes	658	1,042
Cash paid for interest	8,411	9,640
Non-cash investing and financing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 7,824	$ 12,870