Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales:
Net sales	$ 849,540,000	$ 872,196,000	$ 1,763,092,000	$ 1,802,022,000
Operating income (loss):
Consolidated operating income (loss)	(1,979,000)	21,909,000	8,829,000	40,536,000
Technology Products [Member]
Net sales:
Net sales	745,586,000	792,745,000	1,567,475,000	1,651,008,000
Operating income (loss):
Consolidated operating income (loss)	(3,367,000)	18,942,000	5,432,000	36,682,000
Industrial Products [Member]
Net sales:
Net sales	102,852,000	78,765,000	193,230,000	149,600,000
Operating income (loss):
Consolidated operating income (loss)	6,697,000	8,960,000	14,945,000	15,817,000
Corporate and Other [Member]
Net sales:
Net sales	1,102,000	686,000	2,387,000	1,414,000
Operating income (loss):
Consolidated operating income (loss)	$ (5,309,000)	$ (5,993,000)	$ (11,548,000)	$ (11,963,000)