CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net Sales	$ 76,059	$ 75,903	$ 214,842	$ 226,479
Costs and expenses:
Cost of sales	63,404	63,865	179,587	186,365
Selling, general and administrative	9,851	9,856	28,136	30,327
Restructuring charge	1,778	0	2,160	0
Litigation charges	0	247	26	3,471
Loss on disposal of property, plant and equipment	1	(3)	111	4
Total costs and expenses	75,034	73,965	210,020	220,167
Income from operations	1,025	1,938	4,822	6,312
Impairment of investment	(297)	0	(775)	0
Gain on sale of investment	0	0	0	119
Interest income and other, net	63	120	216	281
Earnings before provision for income taxes	791	2,058	4,263	6,712
(Benefit) provision for income taxes	(1,809)	1,046	(676)	3,030
Net earnings	2,600	1,012	4,939	3,682
Class A [Member]
Costs and expenses:
Net earnings	445	167	834	620
Earnings per share:
Common share - basic and diluted (in dollars per share)	$ 0.20	$ 0.08	$ 0.38	$ 0.29
Weighted-average shares outstanding:
Common share - basic and diluted (in shares)	2,174,912	2,174,912	2,174,912	2,174,912
Dividends paid per share:
Common share (in dollars per share)	$ 0.06	$ 0.06	$ 0.18	$ 0.18
Class B [Member]
Costs and expenses:
Net earnings	$ 2,155	$ 845	$ 4,105	$ 3,062
Earnings per share:
Common share - basic and diluted (in dollars per share)	$ 0.22	$ 0.09	$ 0.42	$ 0.32
Weighted-average shares outstanding:
Common share - basic and diluted (in shares)	9,697,097	9,643,641	9,668,785	9,584,444
Dividends paid per share:
Common share (in dollars per share)	$ 0.07	$ 0.07	$ 0.21	$ 0.21