Condensed Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues	$ 199,147	$ 201,728	$ 380,168	$ 368,551
Cost of sales	169,571	161,794	348,582	312,363
Gross profit	29,576	39,934	31,586	56,188
Gain on disposition of assets, net	473	0	473	0
Goodwill impairment	0	0	(6,689)	0
Selling, general and administrative expenses	(15,855)	(16,862)	(32,203)	(32,847)
Income (loss) from operations	14,194	23,072	(6,833)	23,341
Equity in losses of investment	(2)	(29)	(22)	(69)
Net interest expense	(7,063)	(2,205)	(12,809)	(4,303)
Loss on extinguishment of long-term debt	0	(18)	0	(18)
Other expense, net	(2,069)	(1,311)	(12,496)	(145)
Royalty income and other	119	190	2,318	2,535
Income (loss) before income taxes	5,179	19,699	(29,842)	21,341
Income tax provision (benefit)	(271)	2,876	(21,364)	3,200
Net income (loss)	5,450	16,823	(8,478)	18,141
Net loss attributable to redeemable noncontrolling interests	0	(31)	(1,990)	(31)
Net income (loss) attributable to common shareholders	$ 5,450	$ 16,854	$ (6,488)	$ 18,172
Earnings (loss) per share of common stock (in dollars per share)
Basic	$ 0.04	$ 0.11	$ (0.06)	$ 0.12
Diluted	$ 0.04	$ 0.11	$ (0.06)	$ 0.12
Weighted average common shares outstanding (in shares)
Basic	148,971	147,521	148,917	147,471
Diluted	149,691	148,101	148,917	147,931