CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net Sales	$ 75,903	$ 85,041	$ 226,479	$ 218,842
Costs and expenses:
Cost of sales	63,865	64,797	186,365	173,524
Selling, general and administrative	9,856	11,181	30,327	30,642
Litigation charges	247	0	3,471	0
(Gain) loss on sale of property, plant and equipment	(3)	(388)	4	(369)
Total costs and expenses	73,965	75,590	220,167	203,797
Income from operations	1,938	9,451	6,312	15,045
Gain on sale of investment	0	0	119	0
Interest income and other, net	120	87	281	325
Earnings before provision for (benefit from) income taxes	2,058	9,538	6,712	15,370
Provision for (benefit from) income taxes	1,046	(463)	3,030	699
Net earnings	$ 1,012	$ 10,001	$ 3,682	$ 14,671
Class A [Member]
Earnings per share:
Common share - basic and diluted (in dollars per share)	$ 0.08	$ 0.82	$ 0.29	$ 1.19
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]
Earnings per share:
Common share - basic and diluted (in dollars per share)	$ 0.09	$ 0.86	$ 0.32	$ 1.27
Weighted-average shares outstanding:
Common share - basic and diluted (in shares)	9,643,641	9,528,303	9,584,444	9,496,367
Dividends paid per share:
Common share (in dollars per share)	$ 0.07	$ 0.07	$ 0.21	$ 0.21