CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income	$ 42,193	$ 89,196
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	21,500	18,257
Deferred financing cost amortization	84	84
Stock-based compensation	4,204	3,568
Provision for expected credit losses	574	0
Inventory obsolescence	2,322	1,188
(Gain) loss on disposal of assets	(438)	1,403
Deferred income taxes	5,565	7,060
Gain from revaluation of liability related to tax receivable agreement	(1,310)	0
Changes in operating assets and liabilities:
Accounts receivable	42,039	(20,696)
Inventories	17,076	(12,010)
Prepaid expenses and other assets	2,619	1,261
Accounts payable	(25,686)	1,691
Accrued expenses and other liabilities	(8,193)	7,316
Net cash provided by operating activities	102,549	98,318
Cash flows from investing activities
Capital expenditures and other	(18,902)	(29,924)
Proceeds from sale of assets	2,352	1,175
Net cash used in investing activities	(16,550)	(28,749)
Cash flows from financing activities
Payments on finance leases	(3,265)	(3,723)
Dividends paid to Class A common stock shareholders	(8,568)	0
Distributions to members	(4,712)	(3,848)
Repurchases of shares	(1,385)	(1,516)
Net cash used in financing activities	(17,930)	(9,087)
Effect of exchange rate changes on cash and cash equivalents	1	(174)
Net increase in cash and cash equivalents	68,070	60,308
Cash and cash equivalents
Beginning of period	202,603	70,841
End of period	270,673	131,149
Supplemental disclosure of cash flow information
Property and equipment acquired under finance leases	1,896	2,359
Property and equipment in payables	$ 808	$ 3,943