Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment information about the reported product revenues and operating income
Product revenues	$ 141,058	$ 125,639	$ 406,737	$ 238,572
Depreciation and amortization	7,500	9,360	22,902	15,454
Operating income (loss)	10,194	5,814	27,773	11,089
CCS [Member]
Segment information about the reported product revenues and operating income
Product revenues	33,966	30,418	96,117	97,663
Depreciation and amortization	333	309	941	778
Operating income (loss)	9,328	7,527	25,066	24,933
Advanced Technology [Member]
Segment information about the reported product revenues and operating income
Product revenues		99		609
Depreciation and amortization	133	143	399	428
Operating income (loss)	(1,475)	(1,551)	(4,605)	(4,576)
W.E.T. [Member]
Segment information about the reported product revenues and operating income
Product revenues	107,092	95,122	310,620	140,300
Depreciation and amortization	6,692	8,637	20,697	13,967
Operating income (loss)	8,249	3,745	22,274	5,579
Reconciling Items [Member]
Segment information about the reported product revenues and operating income
Depreciation and amortization	342	271	865	551
Operating income (loss)	$ (5,908)	$ (3,907)	$ (14,962)	$ (14,847)