CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 223,413	$ 171,144	$ 409,841	$ 326,475
Costs of sales	184,515	136,791	332,512	258,987
Gross profit	38,898	34,353	77,329	67,488
Selling, general and administrative expense	35,048	31,819	70,109	63,506
Acquisition, restructuring and integration expense	2,304	926	4,787	1,943
Loss (gain) on disposal of property, plant and equipment	184	(25)	289	243
Total operating expenses	37,536	32,720	75,185	65,692
Income from operations	1,362	1,633	2,144	1,796
Other (income) expense, net	(133)	(58)	(1,110)	(238)
Interest expense	8,813	8,261	16,861	15,669
Loss before income taxes	(7,318)	(6,570)	(13,607)	(13,635)
Income tax benefit	(1,499)	(502)	(3,083)	(1,443)
Net loss	(5,819)	(6,068)	(10,524)	(12,192)
Net (loss) income attributable to non-controlling interest	(106)	26	65	336
Net loss attributable to unitholders	(5,713)	(6,094)	(10,589)	(12,528)
Accumulating preferred dividends	(7,145)	(6,109)	(13,882)	(11,848)
Net loss attributable to common unitholders	$ (12,858)	$ (12,203)	$ (24,471)	$ (24,376)
Loss per common unit:
Basic (in dollars per unit)	$ (0.04)	$ (0.04)	$ (0.07)	$ (0.07)
Diluted (in dollars per unit)	$ (0.04)	$ (0.04)	$ (0.07)	$ (0.07)
Weighted-average number of units outstanding
Basic (in units)	332,209	329,043	331,195	328,062
Diluted (in units)	332,209	329,043	331,195	328,062