CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 67,470	$ 59,215	$ 156,303
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	36,308	40,520	38,854
Deferred financing cost amortization	168	168	168
Stock-based compensation	8,620	8,599	6,995
Provision for expected credit losses	310	342	355
Inventory obsolescence	3,490	4,840	2,552
(Gain) loss on disposal of assets	(1,386)	(2,480)	236
Deferred income taxes	4,829	6,948	25,403
(Gain) loss from revaluation of liability related to tax receivable agreement	(898)	555	(5,336)
Changes in operating assets and liabilities:
Accounts receivable	(45,492)	44,829	4,204
Inventories	(36,083)	18,201	(17,592)
Prepaid expenses and other assets	(2,789)	6,177	438
Accounts payable	22,281	(19,434)	(607)
Accrued expenses and other liabilities	16,628	(10,893)	6,994
Payments pursuant to tax receivable agreement	(9,697)	(14,207)	(9,335)
Net cash provided by operating activities	63,759	143,380	209,632
Cash flows from investing activities
Capital expenditures and other	(13,939)	(24,493)	(59,703)
Proceeds from sale of assets	2,306	6,346	3,755
Net cash used in investing activities	(11,633)	(18,147)	(55,948)
Cash flows from financing activities
Payments on finance leases	(5,205)	(5,317)	(7,484)
Dividends paid to Class A common stock shareholders	(21,158)	(17,140)	(4,244)
Distributions to members	(9,742)	(16,304)	(8,392)
Repurchases of shares	(3,283)	(1,445)	(1,549)
Net cash used in financing activities	(39,388)	(40,206)	(21,669)
Effect of exchange rate changes on cash and cash equivalents	272	1,029	(253)
Net increase in cash and cash equivalents	13,010	86,056	131,762
Cash and cash equivalents
Beginning of period	288,659	202,603	70,841
End of period	$ 301,669	$ 288,659	$ 202,603