Condensed Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net revenues	$ 161,941	$ 199,147	$ 325,356	$ 380,168
Cost of sales	158,811	169,571	307,602	348,582
Gross profit	3,130	29,576	17,754	31,586
Gain (loss) on disposition of assets, net	(646)	473	(646)	473
Goodwill impairment				(6,689)
Selling, general and administrative expenses	(13,425)	(15,855)	(28,604)	(32,203)
Income (loss) from operations	(10,941)	14,194	(11,496)	(6,833)
Net interest expense	(5,919)	(7,063)	(11,972)	(12,809)
Other income (expense), net	960	(2,069)	2,577	(12,496)
Royalty income and other	249	117	2,306	2,296
Income (loss) before income taxes	(15,651)	5,179	(18,585)	(29,842)
Income tax benefit	(1,968)	(271)	(1,852)	(21,364)
Net income (loss)	(13,683)	5,450	(16,733)	(8,478)
Net income (loss) attributable to redeemable noncontrolling interests	26		(146)	(1,990)
Net income (loss) attributable to common shareholders	$ (13,709)	$ 5,450	$ (16,587)	$ (6,488)
Earnings (loss) per share of common stock:
Basic	$ (0.09)	$ 0.04	$ (0.11)	$ (0.06)
Diluted	$ (0.09)	$ 0.04	$ (0.11)	$ (0.06)
Weighted average common shares outstanding (in shares)
Basic	150,028	148,971	149,982	148,917
Diluted	150,028	149,691	149,982	148,917