Condensed Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net revenues	$ 193,490	$ 212,609	$ 573,658	$ 581,160
Cost of sales	158,862	157,535	507,444	469,898
Gross profit	34,628	55,074	66,214	111,262
Gain on disposition of assets, net	440	0	913	0
Goodwill impairment	0	0	(6,689)	0
Selling, general and administrative expenses	(16,053)	(16,076)	(48,256)	(48,923)
Income from operations	19,015	38,998	12,182	62,339
Equity in losses of investment	(11)	(13)	(33)	(82)
Net interest expense	(7,598)	(1,901)	(20,407)	(6,204)
Gain (loss) on extinguishment of long-term debt	9,239	0	9,239	(18)
Other income (expense), net	8,824	(2,285)	(3,672)	(2,430)
Royalty income and other	208	362	2,526	2,897
Income (loss) before income taxes	29,677	35,161	(165)	56,502
Income tax provision (benefit)	5,232	3,539	(16,132)	6,739
Net income	24,445	31,622	15,967	49,763
Net loss attributable to redeemable noncontrolling interests	(54)	(73)	(2,044)	(104)
Net income attributable to common shareholders	$ 24,499	$ 31,695	$ 18,011	$ 49,867
Earnings per share of common stock (in dollars per share)
Basic	$ 0.16	$ 0.21	$ 0.10	$ 0.33
Diluted	$ 0.16	$ 0.21	$ 0.10	$ 0.33
Weighted average common shares outstanding (in shares)
Basic	149,032	147,575	148,956	147,506
Diluted	149,951	148,354	149,824	148,086