CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 53,079	$ 125,029
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	31,262	28,264
Deferred financing cost amortization	126	126
Stock-based compensation	6,436	5,257
Provision for expected credit losses	341	255
Inventory obsolescence	3,376	1,708
(Gain) loss on disposal of assets	(1,810)	820
Deferred income taxes	5,182	15,072
(Gain) loss from revaluation of liability related to tax receivable agreement	555	(558)
Changes in operating assets and liabilities:
Accounts receivable	48,190	(8,326)
Inventories	19,188	(14,513)
Prepaid expenses and other assets	1,127	4,032
Accounts payable	(23,753)	(4,334)
Accrued expenses and other liabilities	(7,607)	4,694
Payments pursuant to tax receivable agreement	(14,207)	(9,335)
Net cash provided by operating activities	121,485	148,191
Cash flows from investing activities
Capital expenditures and other	(21,908)	(40,526)
Proceeds from sale of assets	5,414	2,811
Net cash used in investing activities	(16,494)	(37,715)
Cash flows from financing activities
Payments on finance leases	(4,298)	(5,660)
Dividends paid to Class A common stock shareholders	(12,847)	0
Distributions to members	(15,560)	(5,853)
Repurchases of shares	(1,385)	(1,529)
Net cash used in financing activities	(34,090)	(13,042)
Effect of exchange rate changes on cash and cash equivalents	437	(730)
Net increase in cash and cash equivalents	71,338	96,704
Cash and cash equivalents
Beginning of period	202,603	70,841
End of period	273,941	167,545
Supplemental disclosure of cash flow information
Property and equipment acquired under finance leases	2,018	2,921
Property and equipment in payables	$ 621	$ 4,968