Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 785,602	$ 801,093
Cost of sales	631,393	646,202
Gross profit	154,209	154,891
Selling, general and administrative expenses	122,370	127,851
Asset impairments (note 4)	65,152
Income (loss) from operations	(33,313)	27,040
Other income (expense)	(4,443)	(2,764)
Earnings (loss) before interest and income taxes	(37,756)	24,276
Interest expense	22,510	21,979
Income (loss) before income taxes	(60,266)	2,297
Provision for income taxes	8,753	10,253
Net loss	$ (69,019)	$ (7,956)
Net loss per share:
Basic (in dollars per share)	$ (3.08)	$ (0.36)
Diluted (in dollars per share)	$ (3.08)	$ (0.36)
Weighted average shares:
Basic (in shares)	22,419,138	22,180,102
Diluted (in shares)	22,419,138	22,180,102
Dividends declared per share (in dollars per share)		$ 0.1175
Product [Member]
Revenues	$ 782,437	$ 797,858
Shipping and Handling [Member]
Revenues	$ 3,165	$ 3,235