CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net income	$ 29,910	$ 42,193
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	18,352	21,500
Deferred financing cost amortization	84	84
Stock-based compensation	4,438	4,204
Provision for expected credit losses	149	574
Inventory obsolescence	1,566	2,322
Gain on disposal of assets	(613)	(438)
Deferred income taxes	(4,506)	5,565
(Gain) loss from revaluation of liability related to tax receivable agreement	1,004	(1,310)
Changes in operating assets and liabilities:
Accounts receivable	(27,858)	42,039
Inventories	(2,569)	17,076
Prepaid expenses and other assets	499	2,619
Accounts payable	12,774	(25,686)
Accrued expenses and other liabilities	9,999	(8,193)
Net cash provided by operating activities	43,229	102,549
Cash flows from investing activities
Capital expenditures and other	(5,461)	(18,902)
Proceeds from sale of assets	1,108	2,352
Net cash used in investing activities	(4,353)	(16,550)
Cash flows from financing activities
Payments on finance leases	(2,479)	(3,265)
Dividends paid to Class A common stock shareholders	(9,426)	(8,568)
Distributions to members	(3,560)	(4,712)
Repurchases of shares	(3,174)	(1,385)
Net cash used in financing activities	(18,639)	(17,930)
Effect of exchange rate changes on cash and cash equivalents	186	1
Net increase in cash and cash equivalents	20,423	68,070
Cash and cash equivalents
Beginning of period	288,659	202,603
End of period	309,082	270,673
Supplemental disclosure of cash flow information
Property and equipment acquired under finance leases	6,582	1,896
Property and equipment in payables	$ 694	$ 808