CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 47,087	$ 53,079
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	27,480	31,262
Deferred financing cost amortization	126	126
Stock-based compensation	6,546	6,436
Provision for expected credit losses	112	341
Inventory obsolescence	2,462	3,376
Gain on disposal of assets	(1,136)	(1,810)
Deferred income taxes	(1,404)	5,182
Loss from revaluation of liability related to tax receivable agreement	1,004	555
Changes in operating assets and liabilities:
Accounts receivable	(35,634)	48,190
Inventories	(16,491)	19,188
Prepaid expenses and other assets	(4,239)	1,127
Accounts payable	22,944	(23,753)
Accrued expenses and other liabilities	12,924	(7,607)
Payments pursuant to tax receivable agreement	(9,697)	(14,207)
Net cash provided by operating activities	52,084	121,485
Cash flows from investing activities
Capital expenditures and other	(10,382)	(21,908)
Proceeds from sale of assets	1,965	5,414
Net cash used in investing activities	(8,417)	(16,494)
Cash flows from financing activities
Payments on finance leases	(3,839)	(4,298)
Dividends paid to Class A common stock shareholders	(15,249)	(12,847)
Distributions to members	(8,074)	(15,560)
Repurchases of shares	(3,192)	(1,385)
Net cash used in financing activities	(30,354)	(34,090)
Effect of exchange rate changes on cash and cash equivalents	2	437
Net increase in cash and cash equivalents	13,315	71,338
Cash and cash equivalents
Beginning of period	288,659	202,603
End of period	301,974	273,941
Supplemental disclosure of cash flow information
Property and equipment acquired under finance leases	8,286	2,018
Property and equipment in payables	$ 479	$ 621