CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net sales	$ 121,182	$ 142,015
Cost of sales	98,108	115,202
Gross profit	23,074	26,813
Selling, general and administrative expense	17,670	17,608
Impairment of goodwill and other intangible assets	108,583	0
Restructuring charges	228	158
(Loss) income from operations	(103,407)	9,047
Interest expense	(2,201)	(2,179)
Interest income and other, net	40	402
(Loss) earnings before (benefit) provision for income taxes	(105,568)	7,270
(Benefit) provision for income taxes	(4,872)	1,950
Net (loss) earnings available to common stockholders	(100,696)	5,320
Class A [Member]
Net (loss) earnings available to common stockholders	$ (17,729)	$ 927
Net earnings per common share:
Common share - basic and diluted (in dollars per share)	$ (8.15)	$ 0.43
Weighted-average number of shares outstanding:
Common share - basic and diluted (in shares)	2,175	2,175
Dividends paid per common share:
Common share (in dollars per share)	$ 0.06	$ 0.06
Class B [Member]
Net (loss) earnings available to common stockholders	$ (82,967)	$ 4,393
Net earnings per common share:
Common share - basic and diluted (in dollars per share)	$ (8.55)	$ 0.45
Weighted-average number of shares outstanding:
Common share - basic and diluted (in shares)	9,701	9,670
Dividends paid per common share:
Common share (in dollars per share)	$ 0.07	$ 0.07