Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 213,256	$ 169,148
Cost of sales (exclusive of depreciation and amortization shown separately below)	161,269	126,444
Selling, general and administrative expense	28,125	22,177
Acquisition related costs excluded from selling, general and administrative expense	0	1,776
Depreciation and amortization	23,425	14,281
Restructuring and integration expense	(12)	755
Other operating (income) expense, net	(152)	22
Income from operations	601	3,693
Interest expense	13,801	11,996
Loss on extinguishment of debt and write-off of debt issuance costs	2,699	0
Other (income) expense, net	729	(313)
Loss before (provision) benefit for income taxes and share of net income from joint venture	(16,628)	(7,990)
(Provision) benefit for income taxes	(2,241)	1,176
Share of net income from joint venture	269	831
Net loss	(18,600)	(5,983)
Other comprehensive income (loss):
Change in fair value of interest rate swap, net of tax	(3,856)	0
Foreign currency translation gain	1,262	5,465
Other comprehensive income (loss)	(2,594)	5,465
Comprehensive loss	$ (21,194)	$ (518)
Basic net loss per share
Net loss per share (in dollars per share)	$ (0.44)	$ (0.22)
Weighted average shares outstanding (in shares)	41,972	27,597
Diluted net loss per share
Net loss per share (in dollars per share)	$ (0.44)	$ (0.22)
Weighted average shares outstanding (in shares)	41,972	27,597