CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 121,373	$ 135,928
Cost of sales	84,932	93,386
Gross margin	36,441	42,542
Selling and administrative expenses	24,393	24,101
Research and development expenses	5,348	5,209
Restructuring and impairment charges	7,384
Operating income (loss)	(684)	13,232
Equity income in unconsolidated joint ventures	657	1,428
Other income (expense), net	(140)	1,351
Realized investment gain (loss):
Increase (decrease) in fair value of investments	(522)	97
Less: Portion reclassified to/from other comprehensive income	2,723	95
Net realized gain (loss)	(3,245)	2
Interest income (expense), net	(1,190)	(1,579)
Income (loss) before income tax expense (benefit)	(4,602)	14,434
Income tax expense (benefit)	(2,902)	3,369
Income (loss) from continuing operations	(1,700)	11,065
Income (loss) from discontinued operations, net of income taxes	(108)	(1,631)
Net income (loss)	(1,808)	9,434
Basic net income (loss) per share:
Income (loss) from continuing operations	$ (0.10)	$ 0.70
Income (loss) from discontinued operations	$ (0.01)	$ (0.10)
Net income (loss)	$ (0.11)	$ 0.60
Diluted net income (loss) per share
Income (loss) from continuing operations	$ (0.10)	$ 0.67
Income (loss) from discontinued operations	$ (0.01)	$ (0.10)
Net income (loss)	$ (0.11)	$ 0.57
Comprehensive income (loss)	$ 5,586	$ 24,480
Shares used in computing:
Basic	16,232,856	15,893,475
Diluted	16,232,856	16,528,710